Double-inching door locking structure

Abstract

The utility model discloses a double-micro-motion door locking structure which comprises a door lock plate arranged on a door frame and provided with a micro switch; the lock hook is arranged on the door body and is matched with the door lock plate; after the door body is closed, the lock hook acts on the microswitch; the microswitch is provided with a first switch and a second switch, a hinge shaft is fixed to the door lock plate, a connecting rod is connected to the hinge shaft, and the connecting rod and the lock hook are arranged in a matched mode. When the door body is closed, the lock hook acts on the first switch and pushes the connecting rod, so that the connecting rod acts on the second switch. The first switch and the second switch are arranged on the door lock plate, the connecting rod is rotationally connected to the door lock plate, when the door body is closed, the lock hook acts on the first switch and pushes the connecting rod at the same time, so that the connecting rod acts on the second switch, and the microwave oven can be started only after the first switch and the second switch are both switched on. The microwave oven can be effectively prevented from being started when the oven door is opened, and the use safety of the microwave oven is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of door lock technology, specifically relating to a double micro-motion lock door structure. Background Technology

[0002] Micro-motion door locks use mechanical structures, such as rollers or pressing devices, to trigger internal micro-switches, generating electronic signals that are transmitted to the control unit for status detection.

[0003] This is especially relevant to the micro-switch door lock of microwave ovens. The micro-switch door lock is a core component for the safe operation of microwave ovens. It uses a micro switch to detect the door lock status and control the circuit. When the door is closed, the microwave heating function is activated; when the door is opened, the power is immediately cut off to prevent leakage.

[0004] In existing technologies, traditional microwave oven door locks mostly use a single micro switch or mechanical latch structure, which poses a risk of accidental triggering due to contact wear, and after long-term use, the door lock is prone to softening or mechanical fatigue, leading to safety hazards. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a double micro-motion door lock structure. By setting switch one and switch two on the door lock plate and rotating the connecting rod on the door lock plate, when the door is closed, the lock hook acts on switch one and pushes the connecting rod at the same time, so that the connecting rod acts on switch two. The microwave oven can only be started when both switch one and switch two are fully connected. This can effectively prevent the microwave oven from being started when the oven door is open, and greatly improve the safety of microwave oven use.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A dual-micro-motion door lock structure includes: a door lock plate mounted on the door frame, equipped with a micro switch; a lock hook mounted on the door body, matched with the door lock plate; when the door is closed, the lock hook acts on the micro switch; the micro switch has a first switch and a second switch; a hinge shaft is fixed on the door lock plate, and a connecting rod is connected to the hinge shaft, matched with the lock hook; when the door is closed, the lock hook acts on the first switch and pushes the connecting rod, causing the connecting rod to act on the second switch. This invention, by setting the first and second switches on the door lock plate and rotating the connecting rod on the door lock plate, ensures that when the door is closed, the lock hook acts on the first switch and simultaneously pushes the connecting rod, causing the connecting rod to act on the second switch. The microwave oven can only be started when both switches are fully activated, effectively preventing the microwave oven from being started with the door open, greatly improving the safety of microwave oven use.

[0008] Furthermore, the connecting rod includes a bushing, a bent section, and a pushing section. The bent section is located between the bushing and the pushing section. The bushing is fitted onto the outside of the hinge shaft. The pushing section is matched with the locking hook, and the bent section is matched with switch two. The bushing, fitted onto the outside of the hinge shaft, enables the rotation of the connecting rod. When the microwave oven door is closed, the locking hook inserts into the door lock plate, causing the end of the locking hook to act on switch one. Simultaneously, the locking hook pushes the connecting rod, causing it to rotate around the hinge shaft, controlling the bending section to act on switch two.

[0009] Furthermore, the outer wall of the bushing is provided with an upper limit block and a lower limit block, with the lower limit block located below the upper limit block. A limiting cavity is formed between the lower and upper limit blocks, and the door lock plate is correspondingly provided with a limiting part, which is limited within the limiting cavity, thereby limiting the bushing to the hinge shaft. By limiting the bushing between the upper and lower limit blocks, the bushing is limited to the outside of the hinge shaft.

[0010] Furthermore, the door lock plate has a locking slot corresponding to the lock hook. The locking slot protrudes away from the lock hook to form a limiting protrusion, which limits the pushing section. The limiting protrusion limits the rotation of the connecting rod, and the locking slot facilitates the insertion of the lock hook. An inclined section is provided on the side of the locking slot near the lock hook, which guides the entry and exit of the lock hook. The inclined section facilitates the insertion of the microwave oven's lock hook into the door lock plate and also provides a guiding function, making it easier for the lock hook to enter and exit the locking slot.

[0011] Furthermore, a pressing plate is formed by protrusions on the door lock plate, and the pressing plate is provided with pressing pieces. The pressing pieces abut against the top surfaces of switch one and switch two and limit them on the door lock plate. The pressing plate abuts against one side of switch one and switch two, and the setting of the pressing pieces limits switch one and switch two on the door lock plate.

[0012] Furthermore, both switch one and switch two are provided with through holes, and the door lock plate is provided with corresponding positioning pins that are inserted into the through holes. The positioning pins, inserted into the through holes, facilitate quick positioning during the installation of switch one and switch two.

[0013] Furthermore, the door lock plate has a positioning part protruding from the pressure plate. The pressure plate abuts against one side of switch one and one side of switch two, while the positioning part abuts against the other side of switch one and the other side of switch two. The positioning part cooperates with the pressure plate to limit and fix both sides of switch one and switch two, thereby fixing switch one and switch two to the door lock plate, eliminating the need for screw fixing. At the same time, switch one and switch two are simple and convenient to assemble and disassemble.

[0014] Furthermore, the lock hook includes a mounting part and a pressing part. The pressing part is connected to the mounting part on the side near the door lock plate. The bottom of the mounting part has a connecting hole for suspending the connecting spring, and the top of the mounting part has a through hole for hinged to the door. When the door is closed, the pressing part acts on switch one and pushes the connecting rod. The mounting part is designed to install and connect the lock hook. When the door is closed, the pressing part inserts into the lock, first acting on switch one, and then pushing the connecting rod, causing the connecting rod to act on switch two. This allows the microwave oven to detect that the door is closed and thus turn on the power for normal operation. The mounting part and the pressing part adopt an integral molding structure. The integral molding structure improves the structural strength of the lock hook and ensures the stability of the door lock operation.

[0015] Furthermore, the hinge shaft has a threaded hole, and a limit screw is connected inside the threaded hole. By screwing in the limit screw, the bushing is limited to the hinge shaft.

[0016] Furthermore, the hinge shaft has a limiting end at the top, and the outer diameter of the limiting end is larger than the inner diameter of the bushing. After the hinge shaft is injection molded, the bushing is fitted onto the outside of the hinge shaft. Then, by hot pressing the top of the hinge shaft, the top of the hinge shaft is deformed to form the limiting end. The outer diameter of the limiting end is larger than the inner diameter of the bushing, thereby limiting the bushing on the hinge shaft.

[0017] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0018] This invention features two switches on a door lock plate, and a connecting rod that rotates on the door lock plate. When the door is closed, the lock hook acts on switch one and simultaneously pushes the connecting rod, causing the connecting rod to act on switch two. The microwave oven can only be started when both switches one and two are fully connected. This effectively prevents the microwave oven from being started with the door open, greatly improving the safety of microwave oven use.

[0019] In this invention, the connecting rod includes a bushing, a bent section, and a pushing section. The bent section is located between the bushing and the pushing section. The bushing is fitted onto the outside of the hinge shaft. The pushing section is matched with a locking hook, and the bent section is matched with a second switch. The bushing, fitted onto the outside of the hinge shaft, enables the rotation of the connecting rod. When the microwave oven door is closed, the locking hook inserts into the door lock plate, causing the end of the locking hook to act on the first switch. Simultaneously, the locking hook pushes the first switch, causing the connecting rod to rotate around the hinge shaft, controlling the bending section to act on the second switch.

[0020] The outer wall of the bushing in this invention is provided with an upper limit block and a lower limit block, with the lower limit block located below the upper limit block. A limiting cavity is formed between the lower and upper limit blocks. The door lock plate is correspondingly provided with a limiting part, which is limited within the limiting cavity, thereby limiting the bushing to the hinge shaft. By limiting the bushing between the upper and lower limit blocks, the limiting part is positioned outside the hinge shaft. Through the cooperation of the upper and lower limit blocks and the limiting part, the bushing and hinge shaft are fixed in place without screws. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of a microwave oven.

[0023] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;

[0024] Figure 3 This is a schematic diagram of the connection between the door lock plate, switch one, and switch two in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of switch two in Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of the connecting rod in Embodiment 1 of this utility model;

[0027] Figure 6 This is a schematic diagram of the locking hook structure in Embodiment 1 of this utility model;

[0028] Figure 7 This is a schematic diagram of the door lock plate in Embodiment 1 of this utility model;

[0029] Figure 8 This is a schematic diagram of the door lock plate, switch one, and switch two in Embodiment 2 of this utility model;

[0030] Figure 9 This is a schematic diagram of the door lock plate in Embodiment 2 of this utility model.

[0031] In the diagram, 1-Door lock plate; 2-Door frame; 3-Door body; 4-Lock hook; 5-Switch 1; 6-Switch 2; 7-Hinge shaft; 8-Connecting rod; 9-Busset; 10-Bending section; 11-Push section; 12-Upper limit block; 13-Lower limit block; 14-Limit cavity; 15-Limit part; 16-Lock opening; 17-Limit protrusion; 18-Inclined part; 19-Pressure plate; 20-Pressure piece; 21-Through hole; 22-Positioning post; 23-Positioning part; 24-Mounting part; 25-Extrusion part; 26-Connecting hole; 27-Spring; 28-Through hole; 29-Threaded hole; 30-Limit screw; 31-Limit end; 32-Microwave oven. Detailed Implementation

[0032] like Figures 1 to 7 As shown, this is Embodiment 1 of the present invention, a double micro-motion door lock structure, including: a door lock plate 3 disposed on the door frame 2, on which a micro switch is installed; a lock hook 4 disposed on the door body 3, the lock hook 4 being matched with the door lock plate 3; when the door body 3 is closed, the lock hook 4 acts on the micro switch; the micro switch includes a first switch 5 and a second switch 6, a hinge shaft 7 is fixed on the door lock plate 3, a connecting rod 8 is connected to the hinge shaft 7, the connecting rod 8 being matched with the lock hook 4; when the door body 3 is closed, the lock hook 4 acts on the first switch 5 and pushes the connecting rod 8, so that the connecting rod 8 acts on the second switch 6.

[0033] Link 8 includes a bushing 9, a bent section 10, and a pushing section 11. The bent section 10 is located between the bushing 9 and the pushing section 11. The bushing 9 is fitted onto the outside of the hinge shaft 7. The pushing section 11 is matched with the locking hook 4, and the bent section 10 is matched with the second switch 6. The bushing 9, fitted onto the outside of the hinge shaft 7, enables the rotation of link 8. When the microwave oven door is closed, the locking hook 4 is inserted into the door lock plate 3, causing the end of the locking hook 4 to act on the first switch 5. At the same time, the locking hook 4 pushes the pushing section 11, causing link 8 to rotate around the hinge shaft 7, controlling the bending section 10 to act on the second switch 6.

[0034] The outer wall of the bushing 9 is provided with an upper limit block 12 and a lower limit block 13. The lower limit block 13 is located below the upper limit block 12, and a limiting cavity 14 is formed between the lower limit block 13 and the upper limit block 12. The door lock plate 3 is provided with a limiting part 15, which is limited within the limiting cavity 14, thereby limiting the bushing 9 to the hinge shaft 7. By limiting the bushing 9 between the upper limit block 12 and the lower limit block 13 through the limiting part 15, the bushing 9 is limited to the outside of the hinge shaft 7.

[0035] The door lock plate 3 has a lock opening 16 corresponding to the lock hook 4. The lock opening 16 protrudes away from the lock hook 4 to form a limiting protrusion 17, which limits the push section 11. The limiting protrusion 17 limits the rotation of the connecting rod 8, and the lock opening 16 facilitates the insertion of the lock hook 4. The lock opening 16 has an inclined part 18 on the side near the lock hook 4, which guides the entry and exit of the lock hook 4. The inclined part 18 facilitates the insertion of the microwave oven's lock hook 4 into the door lock plate 3, and also has a certain guiding function to facilitate the entry and exit of the lock hook 4 from the lock opening 16.

[0036] A pressing plate 19 is protruding on the door lock plate 3. The pressing plate 19 is provided with a pressing piece 20. The pressing piece 20 abuts against the top surface of switch 5 and switch 6 and limits them on the door lock plate 3. The pressing plate 19 abuts against one side of switch 5 and switch 6. The setting of the pressing piece 20 limits switch 5 and switch 6 on the door lock plate 3.

[0037] Both switch 5 and switch 6 have through holes 21, and the door lock plate has corresponding positioning posts 22, which are inserted into the through holes 21. The positioning posts 22, inserted into the through holes 21, facilitate quick positioning of switches 5 and 6 during installation.

[0038] The door lock plate 3 has a positioning part 23 protruding from the pressure plate 19. The pressure plate 19 abuts against one side of switch 5 and one side of switch 6, while the positioning part 23 abuts against the other side of switch 5 and switch 6. The positioning part 23 cooperates with the pressure plate 19 to limit and fix the two sides of switch 5 and switch 6, thereby fixing switch 5 and switch 6 to the door lock plate 3, eliminating the need for screw fixing. At the same time, the installation and removal of switch 5 and switch 6 are simple and convenient.

[0039] The locking hook includes a mounting part 24 and a pressing part 25. The pressing part 25 is connected to the mounting part 24 on the side near the door lock plate 3. The bottom of the mounting part 24 has a connecting hole 26 for suspending the connecting spring 27. The top of the mounting part 24 has a through hole 28 for hinged to the door body 3. When the door body 3 is closed, the pressing part 25 acts on switch 5 and pushes the connecting rod 8. The mounting part 24 is designed to install the locking hook 4. When the door body 3 is closed, the pressing part 25 is inserted into the lock opening 16, first acting on switch 5, and then pushing the connecting rod 8, causing the connecting rod 8 to act on switch 6, thereby enabling the microwave oven to detect that the door body 3 is closed and turn on the power to work normally. The mounting part 24 and the pressing part 25 adopt an integral molding structure. The integral molding structure improves the structural strength of the locking hook 4 and ensures the stability of the door lock operation.

[0040] The hinge shaft 7 has a limiting end 31 at its top, and the outer diameter of the limiting end 31 is larger than the inner diameter of the bushing 9. After the hinge shaft 7 is injection molded, the bushing 9 is fitted onto the outside of the hinge shaft 7. The top of the hinge shaft 7 is then hot-pressed, causing the top of the hinge shaft 7 to deform and form the limiting end 31. The outer diameter of the limiting end 31 is larger than the inner diameter of the bushing 9, thereby limiting the bushing 9 on the hinge shaft 7.

[0041] like Figure 8 and Figure 9 As shown, this is Embodiment 2 of the present invention, which is basically the same in structure as Embodiment 1, except that: the hinge shaft 7 is provided with a threaded hole 29, and a limiting screw 30 is connected inside the threaded hole 29. By screwing in the limiting screw 30, the bushing 9 is limited on the hinge shaft 7.

[0042] This invention features a switch 5 and a switch 6 on the door lock plate 3, with a connecting rod 8 rotatably connected to the door lock plate 3. When the door 3 is closed, the locking hook 4 acts on the switch 5 and simultaneously pushes the connecting rod 8, causing the connecting rod 8 to act on the switch 6. The microwave oven can only be started when both switches 5 and 6 are fully connected, effectively preventing the microwave oven from being started with the door open and greatly improving the safety of microwave oven use.

[0043] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A dual micro-motion lock structure, including: The door lock plate, located on the door frame, is equipped with a micro switch; A locking hook is provided on the door body, and the locking hook is matched with the door lock plate; When the door is closed, the locking hook acts on the micro switch; The feature is that: the micro switch is provided with switch one and switch two; a hinge shaft is fixed on the door lock plate; a connecting rod is connected to the hinge shaft; and the connecting rod is matched with the lock hook; when the door is closed, the lock hook acts on switch one and pushes the connecting rod, so that the connecting rod acts on switch two.

2. The dual micro-motion lock door structure according to claim 1, characterized in that: The connecting rod includes a bushing, a bent section, and a pushing section. The bent section is located between the bushing and the pushing section. The bushing is sleeved on the outside of the hinge shaft. The pushing section is matched with the locking hook, and the bent section is matched with the second switch.

3. The dual micro-motion lock door structure according to claim 2, characterized in that: The outer wall of the bushing is provided with an upper limit block and a lower limit block. The lower limit block is located below the upper limit block, and a limiting cavity is formed between the lower limit block and the upper limit block. The door lock plate is provided with a limiting part, which is limited in the limiting cavity, thereby limiting the bushing on the hinge shaft.

4. The dual micro-motion lock door structure according to claim 2, characterized in that: The door lock plate has a lock opening corresponding to the lock hook. The lock opening protrudes to the side away from the lock hook to form a limiting protrusion. The limiting protrusion limits the pushing section. The lock opening has an inclined part on the side close to the lock hook. The inclined part guides the lock hook to enter and retract.

5. The dual micro-motion lock door structure according to claim 1, characterized in that: A pressing plate is formed by protrusions on the door lock plate. The pressing plate is provided with a pressing piece. The pressing piece abuts against the top surface of the first switch and the second switch and is limited on the door lock plate.

6. The dual micro-motion lock door structure according to claim 1, characterized in that: Both the first switch and the second switch are provided with through holes, and the door lock plate is provided with a corresponding positioning post, which is inserted into the through hole.

7. The dual micro-motion lock door structure according to claim 5, characterized in that: The door lock plate has a positioning part protruding from the pressing plate. The pressing plate abuts against one side of switch one and one side of switch two, and the positioning part abuts against the other side of switch one and the other side of switch two.

8. The dual micro-motion lock door structure according to claim 1, characterized in that: The lock hook includes a mounting part and a pressing part. The pressing part is connected to the mounting part on the side near the door lock plate. The bottom of the mounting part is provided with a connecting hole for suspending a connecting spring. The top of the mounting part is provided with a through hole for hinged to the door body. When the door body is closed, the pressing part acts on the switch and pushes the connecting rod. The mounting part and the pressing part adopt an integral molding structure.

9. The dual micro-motion lock door structure according to claim 2, characterized in that: The hinge shaft is provided with a threaded hole, and a limit screw is connected in the threaded hole.

10. The dual micro-motion lock door structure according to claim 2, characterized in that: The hinge shaft has a limiting end at the top, and the outer diameter of the limiting end is larger than the inner diameter of the bushing.

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