Screw top piece composite transmission type electric suction lock

Abstract

The invention discloses a screw top piece composite transmission type electric suction lock which comprises a base plate, a cover plate, a lock piece composite transmission mechanism, a screw electric pushing mechanism and an electric control system. The locking plate composite transmission mechanism is composed of a driving locking plate and a non-return locking plate, and the locking plate composite transmission mechanism is endowed with a reverse rotation trend through a torsion spring. The screw electric pushing mechanism drives the movable seat to move through the screw, and the unlocking top sheet at the lower part of the movable seat can respectively push the driving locking sheet to rotate clockwise for locking or push the non-return locking sheet to rotate anticlockwise for releasing; the electric control system detects the positions of the locking plate and the rack through the three microswitches and controls the motor to rotate forwards and backwards so as to achieve automatic switching of the unlocking state, the semi-locking state and the full-locking state. The locking device is compact in structure, reliable in transmission and capable of accurately recognizing and executing the locking state, the safety is improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of electric suction lock technology, specifically relating to a screw-top plate composite transmission type electric suction lock. Background Technology

[0002] Medical consumable cabinets are crucial equipment in medical institutions for storing important supplies such as medicines, reagents, and medical devices. Besides meeting the requirements of a clean and stable storage environment, they also need reliable safety protection and convenient operation. With the development of medical technology, electromagnetic compatibility (EMC) requirements in hospital environments are increasingly stringent. Especially in critical areas such as operating rooms, if electromagnetic wave signals from the ultra-high frequency antenna inside the consumable cabinet leak out, it can easily interfere with surrounding precision equipment. Therefore, it is essential to effectively shield electromagnetic waves inside the cabinet.

[0003] In addition, to ensure the rapid access of consumables in emergency medical situations, the cabinet door lock design must take into account both the reliability of locking and the convenience of emergency opening. The rationality of the door lock structure has become a key factor affecting the overall performance of the medical consumable cabinet.

[0004] Currently, there are two main solutions for selecting door locks for medical consumable cabinets in the industry, both of which have significant technical flaws: The first solution borrows from automotive electric suction locks. However, existing automotive electric suction locks are mostly custom-developed for specific car models, with their installation dimensions, locking stroke, and control logic deeply tied to the vehicle model, resulting in poor versatility and difficulty in adapting to medical consumable cabinets of different structures and specifications. More importantly, the emergency opening mechanism of this type of electric suction lock usually relies on the vehicle's own electronic control system. In abnormal situations such as power outages or system malfunctions, the cabinet door cannot be opened quickly by manual means, seriously affecting the efficiency of retrieving supplies in emergency medical scenarios and posing significant safety hazards.

[0005] The second type of solution uses ordinary electronic locks, whose locking structure is simple and can only achieve basic "lock-unlock" functions, failing to ensure a tight fit between the door panel and the cabinet. This defect leads to two problems: firstly, a gap exists between the door panel and the cabinet, interrupting the electromagnetic wave shielding path, and the shielding effect cannot meet the high standards required for medical scenarios; secondly, a large external force is required to fully engage the latch when closing the door, making operation laborious and prone to incomplete locking due to insufficient closing force, which not only affects the user experience but also further weakens the cabinet's sealing and electromagnetic shielding performance.

[0006] In summary, existing door lock solutions have shortcomings in terms of universal compatibility, emergency operation, locking tightness, and electromagnetic shielding effectiveness. There is an urgent need for a new type of electric suction lock structure that can comprehensively solve the above problems. Summary of the Invention

[0007] This invention aims to provide a screw-top plate composite transmission type electric suction lock, which solves the technical problems of poor versatility, inconvenience in emergency opening, and insufficient electromagnetic shielding effect caused by loose locking in existing electric suction locks for medical consumable cabinets.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A screw-top plate composite transmission type electric suction lock includes a base plate, on which a locking plate composite transmission mechanism, an electric control system and a screw electric push mechanism are provided, and a locking slot is provided at the bottom of the base plate; The locking plate composite transmission mechanism includes a driving locking plate and a check locking plate. The driving locking plate is pivotally connected to the base plate via a first pivot. A first torsion spring is provided on the first pivot to give the driving locking plate a counterclockwise rotation tendency. The lower end of the check locking plate is pivotally connected to the base plate via a second pivot and is located to the left of the driving locking plate. A second torsion spring is provided on the second pivot to give the check locking plate a clockwise rotation tendency. The lower end of the drive lock plate forms a hook lock groove for accommodating the bolt, and the hook lock groove corresponds to the position of the lock opening; the upper end of the drive lock plate forms a push tooth, and the left outer edge of the drive lock plate is provided with a half lock tooth and a full lock tooth, with the half lock tooth located in the clockwise direction of the full lock tooth; the right side of the check lock plate is provided with a locking tooth that selectively engages with the half lock tooth and the full lock tooth. The screw electric actuator mechanism is located above the base plate. This mechanism includes a motor and a screw. The motor is fixed to the base plate, and its main shaft is equipped with a driving gear. Both ends of the screw are mounted on the base plate via bearing seats and bearings, respectively. The end of the screw has a driven gear that meshes with the driving gear. A movable seat is provided on the screw, threadedly engaged with it. An unlocking top plate is located at the lower part of the movable seat. When the movable seat moves to the right, the unlocking top plate contacts the driven gear and pushes the drive locking plate to rotate clockwise. When the movable seat moves to the left, the unlocking top plate contacts the upper end of the check lock plate and pushes it to rotate counterclockwise. The electronic control system includes a control motherboard, a first switch, a second switch, and a third switch. The first switch, the second switch, and the third switch are all micro switches. The first switch is located on the left side of the check lock plate to detect its position. The second switch is located on the upper side of the screw to detect the reset position of the movable seat. The third switch is located on the right side of the drive lock plate to detect the fully locked position of the drive lock plate. The control board is electrically connected to the first switch, the second switch, the third switch, and the motor.

[0009] Furthermore, the substrate has a first arc-shaped hole and a second arc-shaped hole. The center of the first arc-shaped hole is located on the axis of the first pivot, and the center of the second arc-shaped hole is located on the axis of the second pivot. A fourth press-fit stud is fixed on the drive locking plate and extends into the first arc-shaped hole. A fifth press-fit stud is fixed at the upper end of the check lock plate and extends into the second arc-shaped hole.

[0010] Furthermore, the control board is configured to receive signals from the first switch, the second switch, and the third switch, and control the forward and reverse rotation of the motor to achieve the following state switching: Unlocked state: First switch closed, second switch closed, third switch open; Half-locked state: First switch is open, second switch is closed, third switch is open; Full lock state: First switch is open, second switch is open, third switch is closed.

[0011] Furthermore, the aforementioned screw-top plate composite transmission electric suction lock also includes an emergency unlocking mechanism, which includes a connecting rod, an operating rod, and a movable plate. Two end plates are sleeved on the screw, and the two end plates can move around the screw. A guide rod is fixed between the two end plates. The unlocking top plate is located on the movable seat and sleeved on the screw. The unlocking top plate is provided with a through hole for the guide rod to pass through. The connecting rod, operating rod, and movable plate are all located on the back of the base plate; a first elongated hole is opened on the upper part of the base plate, and a first press-fit stud is connected to the end of the operating rod, which moves in the first elongated hole; the operating rod is connected to one of the end plates through a flexible pull rod. The substrate has a second elongated hole, and the right end of the movable plate is fixed with a second press-fit stud. The second press-fit stud is located in the second elongated hole and can move left and right in the second elongated hole. The left side of the movable plate has a third elongated hole, and the end of the fifth press-fit stud is located in the third elongated hole. The upper end of the connecting rod is connected to a first press-fit stud, which moves in the first elongated hole; the movable plate is also provided with a third press-fit stud, and the lower end of the connecting rod is connected to the third press-fit stud.

[0012] Furthermore, the substrate is also provided with a first cover plate and a second cover plate. The first cover plate covers the locking plate composite transmission mechanism, and the second cover plate covers the screw electric actuator mechanism.

[0013] Compared with existing technologies, the advantages of this invention are as follows: Under normal operating conditions, this invention, through a composite transmission design of the drive lock plate, the check lock plate, and the screw electric actuator mechanism, combined with real-time detection of the lock plate and rack position by three microswitches, achieves automatic identification and switching between three states: unlocked, half-locked, and fully locked. This effectively avoids security risks caused by the door not being fully closed. The unlocking top plate, in the reciprocating motion of the movable seat, respectively pushes the drive lock plate to lock and pushes the check lock plate to release, resulting in a compact structure and efficient transmission. Simultaneously, the arc-shaped hole and the press-fit bolt mechanically limit the rotation angle of the lock plate, ensuring precise and reliable operation. The overall structure improves locking security while offering advantages such as smooth operation, low energy consumption, and long service life.

[0014] In terms of status recognition and locking assurance, the system can obtain the position information of the lock plate, anti-return lock plate, and rack in real time according to the on / off status of each switch, thereby accurately determining whether the electric suction lock is in an open, partially locked, or fully locked state. When the electric suction lock is detected to be in a partially locked state, the system can automatically drive the lock plate to complete the full locking action through the drive component, ensuring a tight fit between the door panel and the cabinet, and effectively improving the electromagnetic wave shielding effect of the medical consumables cabinet.

[0015] When a power outage or system failure occurs and emergency unlocking is required, pull the flexible lever. The flexible lever pulls the guide rod through the end plate to rotate, causing the unlocking top plate to lift up and move out of the working area. It is then moved by the connecting rod and finally reset by the push tooth, thus achieving emergency unlocking. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an isometric view of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 2 An isometric view of a screw-top plate composite transmission type electric suction lock of the present invention after removing the first cover plate and the second cover plate; Figure 3 This is a diagram showing the unlocking state of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 4 This is a diagram showing the unlocking standby state of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 5 This is a diagram showing the semi-locked state of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 6 This is a diagram showing the full lock state of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 7 This is a diagram showing the fully locked standby state of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 8 This is an emergency unlocking state diagram of a screw-top plate composite transmission type electric suction lock according to the present invention; Figure 9 for Figure 8 Rear view.

[0017] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. First cover plate; 3. Second cover plate; 4. Locking port; 6. Drive locking plate; 7. Anti-return locking plate; 8. First pivot; 9. First torsion spring; 10. Second pivot; 11. Second torsion spring; 12. Hook lock groove; 13. Pushed tooth; 14. Half locking tooth; 15. Full locking tooth; 16. Locking tooth; 18. Motor; 19. Screw; 20. Drive gear; 21. Bearing housing; 22. Bearing; 23. Driven gear; 24. Movable 25. Seat; 26. Unlocking top plate; 27. First switch; 28. Second switch; 29. ​​Third switch; 30. First arc-shaped hole; 31. Second arc-shaped hole; 32. Fourth press-fit stud; 33. Fifth press-fit stud; 34. Connecting rod; 35. Operating rod; 36. Movable plate; 37. End plate; 38. Guide rod; 39. First elongated hole; 40. First press-fit stud; 41. Flexible pull rod; 42. Second elongated hole; 43. Second press-fit stud; 44. Third elongated hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described in detail below with reference to the embodiments.

[0020] like Figure 1-9 As shown, the present invention provides a screw-top plate composite transmission type electric suction lock, which mainly includes a base plate 1, a first cover plate 2, a second cover plate 3, a lock plate composite transmission mechanism, a screw electric push mechanism, and an electric control system.

[0021] The base plate 1 and the first cover plate 2 are respectively provided with locking slots 4 at corresponding positions below them, for the bolts on the door to extend into. The first cover plate 2 covers the base plate 1, forming an installation area between them to accommodate the locking plate composite transmission mechanism.

[0022] The locking plate composite transmission mechanism is the core of the locking action, including a driving locking plate 6 and a check locking plate 7. The driving locking plate 6 is pivotally connected between the base plate 1 and the first cover plate 2 via a first pivot 8. A first torsion spring 9 is sleeved on the first pivot 8, which causes the driving locking plate 6 to always be subjected to a counterclockwise rotational tendency. The lower end of the check locking plate 7 is pivotally connected between the base plate 1 and the first cover plate 2 via a second pivot 10, and is located to the left of the driving locking plate 6. A second torsion spring 11 is sleeved on the second pivot 10, which causes the check locking plate 7 to always be subjected to a clockwise rotational tendency.

[0023] Specifically, the lower end of the driving locking plate 6 forms a hook locking groove 12 for accommodating the bolt, which corresponds to the position of the locking opening 4 below the base plate 1. The upper end of the driving locking plate 6 forms a push tooth 13, and its left outer edge is provided with a half locking tooth 14 and a full locking tooth 15 (e.g., Figure 2 As shown in the figure, the half-locking tooth 14 is located clockwise from the full-locking tooth 15. The right side of the anti-return locking plate 7 is provided with a locking tooth 16, which can selectively engage with the half-locking tooth 14 or the full-locking tooth 15 on the drive locking plate 6 to achieve different locking states.

[0024] The second cover plate 3 covers the upper part of the base plate 1, forming an installation area between them for accommodating the screw electric actuator mechanism. The screw electric actuator mechanism includes a motor 18 and a screw 19. The motor 18 is fixed on the base plate 1, and its main shaft is equipped with a drive gear 20. The two ends of the screw 19 are respectively mounted on the base plate 1 through bearing seats 21 and bearings. The end of the screw 19 is provided with a driven gear 23 that meshes with the drive gear 20. The screw 19 is provided with a movable seat 24, which is threadedly engaged with the screw 19. The lower part of the movable seat 24 is provided with an unlocking top plate 25. The unlocking top plate 25 has a compound function: when the movable seat 24 moves to the right, the unlocking top plate 25 can contact the pushed tooth 13 and push the drive locking plate 6 to rotate clockwise; when the movable seat 24 moves to the left, the unlocking top plate 25 can contact the upper end of the check lock plate 7 and push it to rotate counterclockwise.

[0025] The electronic control system includes a control board (not shown in the figure), a first switch 26, a second switch 27, and a third switch 28, all of which are microswitches. The first switch 26 is located to the left of the check lock plate 7 and is used to detect the position of the check lock plate 7. The second switch 27 is located above the screw 19 and is used to detect whether the movable seat 24 has reset. The third switch 28 is located to the right of the drive lock plate 6 and is used to detect whether the drive lock plate 6 has reached the fully locked position. The control board is electrically connected to the first switch 26, the second switch 27, the third switch 28, and the motor 18, respectively, and is used to receive switch signals and control the forward and reverse rotation of the motor 18.

[0026] As a preferred embodiment, such as Figure 3 As shown, the substrate 1 also has a first arc-shaped hole 29 and a second arc-shaped hole 30. The center of the first arc-shaped hole 29 is located on the axis of the first pivot 8, and a fourth rivet stud 31 extending into the first arc-shaped hole 29 is fixed on the drive locking plate 6. The center of the second arc-shaped hole 30 is located on the axis of the second pivot 10, and a fifth rivet stud 32 extending into the second arc-shaped hole 30 is fixed at the upper end of the check lock plate 7. The fourth rivet stud 31 and the fifth rivet stud 32 slide in the arc-shaped holes to limit the rotation angle of the drive locking plate 6 and the check lock plate 7, ensuring accurate and reliable motion trajectory.

[0027] The working principle and process of this invention are as follows: 1. From fully locked standby state to unlocked state (see...) Figure 3 ): The movable seat 24 moves to the left, and the unlocking top plate 25 pushes the upper end of the check lock plate 7. The check lock plate 7 rotates counterclockwise, pressing the first switch 26 (closed). The locking teeth 16 and the full locking teeth 15 disengage from the locked state, driving the lock plate 6 to rotate counterclockwise under the action of the first torsion spring 9, and the lock opening 4 is opened. During the movement of the movable seat 24, the second switch 27 is pressed (closed). The third switch 28 is not triggered and is in the open state. That is, the unlocking state signal is: the first switch 26 is closed, the second switch 27 is closed, and the third switch 28 is open. Then the movable seat 24 moves to the right a certain distance, but does not disengage from the second switch 27. At this time, it is in the unlocking standby state (e.g., Figure 4 (as shown) 2. Half-locked state (see...) Figure 5 ): When the door is closed, the bolt enters the lock slot 4 and strikes the lower end of the drive lock plate 6, pushing it to rotate clockwise. The check lock plate 7, under the action of the second torsion spring 11, rebounds clockwise, and its locking teeth 16 engage with the half-locking teeth 14 of the drive lock plate 6, achieving initial locking. At this time, the check lock plate 7 separates from the first switch 26, the first switch 26 is open, the second switch 27 remains closed, and the third switch 28 remains open. The control board detects the half-lock signal indicating that the first switch 26 is open, the second switch 27 is closed, and the third switch 28 is open.

[0028] 3. Fully locked state (see...) Figure 6 ): Upon receiving the half-lock signal, the control motherboard starts the motor 18 to rotate forward, driving the movable seat 24 to move to the right. After moving, the movable seat 24 first separates from the second switch 27 (the second switch 27 is open). Subsequently, the unlocking top plate 25 on the movable seat 24 contacts and pushes the pushed tooth 13 of the drive lock plate 6, causing the drive lock plate 6 to continue rotating clockwise until it presses against the third switch 28 (the third switch 28 is closed). During this process, the bolt is pulled deeper into the lock mouth 4, and the door is tightly locked. At the same time, the locking tooth 16 of the check lock plate 7 slides on the outer edge of the drive lock plate 6 and finally engages with the full lock tooth 15, completing the final locking. At this instant, the state is: the first switch 26 is open, the second switch 27 is open, and the third switch 28 is closed.

[0029] 4. Full lock standby mode (see...) Figure 7 ): After the door is fully locked, the main control board immediately reverses the motor 18, driving the movable seat 24 to move and reset. The unlocking top plate 25 disengages from the driving lock plate 6, which attempts to spring back counterclockwise under the action of the first torsion spring 9. However, its full locking teeth 15 are locked by the locking teeth 16 of the check lock plate 7, thus maintaining the lock. When the movable seat 24 returns to its initial position and presses the second switch 27, the motor 18 stops. The system eventually stabilizes in the reset state: the first switch 26 is open, the second switch 27 is closed, and the third switch 28 is closed. At this time, the check lock plate 7 is locking the full locking teeth 15, and the door is reliably locked.

[0030] Under normal conditions, the electric locking mechanism of this invention uses the reciprocating motion of the unlocking top plate 25 of the movable base 24 to achieve the locking and unlocking functions. However, under abnormal conditions such as circuit failure, the unlocking top plate 25 may remain in any position, resulting in the inability to unlock normally. To solve this problem, this device further optimizes and integrates an emergency unlocking mechanism.

[0031] like Figure 8 and Figure 9 As shown, the emergency unlocking mechanism includes a connecting rod 33, an operating rod 34, and a movable plate 35. Two end plates 36 are sleeved on the screw 19. The two end plates 36 can move around the screw 19. A guide rod 37 is fixed between the two end plates 36. The unlocking top plate 25 is located on the movable seat 24 and sleeved on the screw 19. The unlocking top plate 25 is provided with a through hole for the guide rod 37 to pass through. The connecting rod 33, the operating rod 34, and the movable plate 35 are all located on the back of the base plate 1; a first elongated hole 39 is provided on the upper part of the base plate 1, and a first press-fit stud 40 is connected to the upper end of the connecting rod 33. The first press-fit stud 40 moves in the first elongated hole 39; the operating rod 34 is connected to one of the end plates 36 through a flexible pull rod 41. The substrate 1 has a second elongated hole 42. The right end of the movable plate 35 is fixed with a second riveting stud 43. The second riveting stud 43 is located in the second elongated hole 42 and can move left and right in the second elongated hole 42. The left side of the movable plate 35 has a third elongated hole 44. The end of the fifth riveting stud 32 is located in the third elongated hole 44. The connecting rod 33 is arranged at an angle, and the movable plate 35 is provided with a third press-fit stud (45). The lower end of the connecting rod 33 is connected to the third press-fit stud (45). In this embodiment, all press-fit studs are provided with bolts that cooperate with them. The specific details are conventional technology and will not be described in detail.

[0032] The emergency unlocking mechanism works as follows: Pulling the operating lever 34 upwards causes the end plate 36 to rotate via the flexible pull rod 41. The end plate 36 then causes the guide rod 37 to flip outwards, which in turn causes the unlocking top plate 25 to rotate around the screw 19, ultimately disengaging the unlocking top plate 25 from its original working position. Simultaneously, through the connecting rod 33, the movable plate 35 is moved to the left, which in turn pulls the fifth rivet stud 32 through the third elongated hole 44, causing the check lock plate 7 to rotate counterclockwise, releasing the restriction on the lock teeth 15. The drive lock plate 6 then springs open counterclockwise under the action of the first torsion spring 9, disengaging its lower hook lock groove 12 from the lock opening 4, thus achieving manual emergency unlocking.

[0033] It should be noted that, in this article, the directional terms such as 'left,' 'right,' 'up,' and 'down' are defined based on the perspective of the main view; terms such as 'comprising,' 'including,' or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw-top plate composite transmission type electric suction lock, characterized in that: Includes a base plate (1), on which a locking plate composite transmission mechanism, an electronic control system and a screw electric push mechanism are provided, and a locking port (4) is provided at the bottom of the base plate (1); The locking plate composite transmission mechanism includes a driving locking plate (6) and a check locking plate (7). The driving locking plate (6) is pivotally connected to the base plate (1) via a first pivot (8). A first torsion spring (9) is provided on the first pivot (8) to give the driving locking plate (6) a counterclockwise rotation tendency. The lower end of the check locking plate (7) is pivotally connected to the base plate (1) via a second pivot (10) and is located to the left of the driving locking plate (6). A second torsion spring (11) is provided on the second pivot (10) to give the check locking plate (7) a clockwise rotation tendency. The lower end of the drive lock plate (6) forms a hook lock groove (12) for accommodating the bolt, and the hook lock groove (12) corresponds to the position of the lock opening (4); the upper end of the drive lock plate (6) forms a push tooth (13), and the left outer edge of the drive lock plate (6) is provided with a half lock tooth (14) and a full lock tooth (15), with the half lock tooth (14) located in the clockwise direction of the full lock tooth (15); the right side of the check lock plate (7) is provided with a locking tooth (16) that selectively engages with the half lock tooth (14) and the full lock tooth (15); The screw electric actuator is located above the base plate (1). The screw electric actuator includes a motor (18) and a screw (19). The motor (18) is fixed to the base plate (1), and its main shaft is equipped with a drive gear (20). Both ends of the screw (19) are mounted on the base plate (1) via bearing seats (21) and bearings (22), respectively. The end of the screw (19) is provided with a driven gear (23) that meshes with the drive gear (20). 19) is provided with a movable seat (24), which is threadedly engaged with the screw (19). The lower part of the movable seat (24) is provided with an unlocking top plate (25). When the movable seat (24) moves to the right, the unlocking top plate (25) can contact the pushed tooth (13) and push the drive lock plate (6) to rotate clockwise. When the movable seat (24) moves to the left, the unlocking top plate (25) can contact the upper end of the check lock plate (7) and push it to rotate counterclockwise. The electronic control system includes a control motherboard, a first switch (26), a second switch (27), and a third switch (28). The first switch (26), the second switch (27), and the third switch (28) are all micro switches. The first switch (26) is located on the left side of the check lock plate (7) to detect its position. The second switch (27) is located on the upper side of the screw (19) to detect the reset position of the movable seat (24). The third switch (28) is located on the right side of the drive lock plate (6) to detect the fully locked position of the drive lock plate (6). The control board is electrically connected to the first switch (26), the second switch (27), the third switch (28), and the motor (18).

2. The screw-top plate composite transmission type electric suction lock according to claim 1, characterized in that: The substrate (1) has a first arc-shaped hole (29) and a second arc-shaped hole (30). The center of the first arc-shaped hole (29) is located on the axis of the first pivot (8), and the center of the second arc-shaped hole (30) is located on the axis of the second pivot (10). A fourth press-fit stud (31) extending into the first arc-shaped hole (29) is fixed on the drive locking plate (6), and a fifth press-fit stud (32) extending into the second arc-shaped hole (30) is fixed at the upper end of the check lock plate (7).

3. The screw-top plate composite transmission type electric suction lock according to claim 1, characterized in that: The control board is configured to receive signals from the first switch (26), the second switch (27), and the third switch (28), and control the forward and reverse rotation of the motor (18) to achieve the following state switching: Unlocked state: First switch (26) closed, second switch (27) closed, third switch (28) open; Half-locked state: First switch (26) is open, second switch (27) is closed, and third switch (28) is open; Full lock state: First switch (26) is open, second switch (27) is open, and third switch (28) is closed.

4. The screw-top plate composite transmission type electric suction lock according to claim 1, characterized in that: It also includes an emergency unlocking mechanism, which includes a connecting rod (33), an operating rod (34) and a movable plate (35). Two end plates (36) are sleeved on the screw (19). The two end plates (36) can move around the screw (19). A guide rod (37) is fixed between the two end plates (36). The unlocking top plate (25) is located on the movable seat (24) and sleeved on the screw (19). The unlocking top plate (25) is provided with a through hole for the guide rod (37) to pass through. The connecting rod (33), the operating rod (34) and the movable plate (35) are all located on the back of the base plate (1); the base plate (1) has a first elongated hole (39) on its upper part; the operating rod (34) is connected to one of the end plates (36) through a flexible pull rod (41); The substrate (1) has a second elongated hole (42), and the right end of the movable plate (35) is fixed with a second riveting stud (43). The second riveting stud (43) is located in the second elongated hole (42) and can move left and right in the second elongated hole (42). The left side of the movable plate (35) has a third elongated hole (44), and the end of the fifth riveting stud (32) is located in the third elongated hole (44). The upper end of the connecting rod (33) is connected to a first press-fit stud (40), which moves in the first elongated hole (39); the movable plate (35) is also provided with a third press-fit stud (45), and the lower end of the connecting rod (33) is connected to the third press-fit stud (45).

5. The screw-top plate composite transmission type electric suction lock according to claim 1, characterized in that: The substrate (1) is also provided with a first cover plate (2) and a second cover plate (3). The first cover plate (2) is fastened on the locking plate composite transmission mechanism, and the second cover plate (3) is fastened on the screw electric push mechanism.

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