Electromagnetic lock
By introducing transmission components and manual unlocking mechanisms into the electromagnetic lock, the problem of unblocking in the event of power failure or failure is solved, and the reliability and safety of the vending cabinet is achieved, preventing losses and theft.
Patent Information
- Application Number
- CN202510870077.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-26
- Publication Date
- 2025-08-05
AI Technical Summary
The existing electromagnetic lock cannot be unlocked normally in the event of power outage or failure, resulting in the automatic vending cabinet being unable to sell normally, especially the refrigerated food being unable to be taken out in time, resulting in losses.
An electromagnetic lock is designed, including a component mount, a cover, an electromagnetic push rod, a lock hook and an adjustment slider. Through the cooperation of the transmission assembly and the elastic member, manual unlocking is achieved, and a movable connection groove and a check section are set on the lock hook to prevent theft.
In the event of power outage or failure, it can be unlocked manually in time to prevent losses and prevent illegal unlocking through mechanical structures, improving safety and reliability.
Smart Images
Figure CN120425949A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of safety locks, in particular to an electromagnetic lock. Background Art
[0002] In modern retail environments, the rapid development of unmanned shopping technology has led to the widespread use of smart refrigerators. These devices are typically equipped with electromagnetic door locks, allowing customers to unlock them by scanning a QR code or paying with NFC, allowing them to easily access the items inside.
[0003] A self-service kiosk is an intelligent retail device that uses a built-in control system and payment module to automatically display, sell, and deliver merchandise. It typically consists of a cabinet, cooling (or heating) system, aisles, display screens, and payment terminals. Consumers can select their desired products without human intervention. After payment, an electromagnetic lock unlocks the cabinet door, allowing them to retrieve the items. The entire shopping process is efficient and convenient, and service is available 24 hours a day in a variety of scenarios, improving shopping convenience and security, and ensuring that items are not removed without permission.
[0004] In the existing technology, the electromagnetic lock can only be unlocked normally when there is power. The main reason is that the electromagnetic push rod's push arm drives the lock hook to rotate and unlock, and it cannot be unlocked quickly when the power is off. In addition, if the electromagnetic push rod fails and cannot drive the push arm to retract, it will also cause the lock to be unable to be unlocked. The inability to unlock will cause the automatic vending machine to be unable to sell goods normally. At the same time, some fresh-keeping foods that need to be refrigerated cannot be taken out in time, which will cause the food in the vending machine to spoil and cause losses. Summary of the Invention
[0005] The object of the present invention is to provide an electromagnetic lock to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an electromagnetic lock, comprising a component mounting seat and a cover shell that cooperates with the component mounting seat, an electromagnetic push rod is provided on the component mounting seat and located inside the cover shell, a lock hook is also rotatably provided inside the component mounting seat, the electromagnetic push rod and the lock hook are connected by a transmission component, and the electromagnetic push rod drives the lock hook to extend or enter the cover shell through the transmission component; an adjustment slider is also slidably provided on the component mounting seat for pushing the push arm of the electromagnetic push rod to retract, and an adjustment port corresponding to the adjustment slider is provided on the cover shell; an elastic member is also provided on the outer side of the push arm of the electromagnetic push rod for preventing the push arm of the electromagnetic push rod from retracting.
[0007] Preferably, a fixed shaft is provided on the component mounting seat, and a shaft hole 1 for rotationally cooperating with the fixed shaft is provided on the locking hook, and the locking hook is rotationally connected to the fixed shaft through the shaft hole 1.
[0008] Preferably, the transmission component includes an adjustment plate slidably arranged on the component mounting seat, one end of the adjustment plate is fixedly connected to the push arm of the electromagnetic push rod, an adjustment rod with a columnar structure is fixedly arranged on the adjustment plate, a movable connecting groove is provided on the lock hook, and the adjustment rod extends into the movable connecting groove.
[0009] Preferably, the movable connection groove includes an interference elimination section and a non-return section. After the lock hook is fully extended out of the cover shell, the extension direction of the non-return section and the sliding direction of the adjustment rod are arranged parallel to each other.
[0010] Preferably, an NFC circuit controller is provided in the component mounting seat, and the NFC circuit controller is connected to the network and electrically connected to the electromagnetic push rod.
[0011] Preferably, a travel switch is integrated on the NFC circuit controller, and a travel detection piece for detecting the travel switch is fixed on the adjustment plate.
[0012] Preferably, the locking hook includes a rotating arm and a hook arm, the hook arm is rotatably connected to the rotating arm via a hinge shaft, the rotating arm is provided with a limiting elastic sheet for hindering the rotation of the hinge shaft, and the hinge shaft is circumferentially provided with two limiting grooves that cooperate with the limiting elastic sheet.
[0013] Preferably, a hinge interface is provided on the rotating arm, and a second shaft hole connected to the hinge interface is also provided on the rotating arm. One end of the hook arm connected to the rotating arm is located in the hinge interface, and the hinge shaft is cooperatively connected with the second shaft hole.
[0014] Preferably, the rotating arm is also provided with a receiving groove connected to the second shaft hole, the limiting elastic piece is arranged in the receiving groove, the middle section of the limiting elastic piece is arranged into an arc structure and extends into the second shaft hole through the connecting part of the receiving groove and the second shaft hole.
[0015] Preferably, an adjusting head is coaxially fixed to the top end of the hinge shaft, a square head countersunk hole is provided on the adjusting head, and an adjusting port 2 corresponding to the adjusting head is provided on the cover shell.
[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, an adjustment slider is provided in the electromagnetic lock for manually adjusting the retraction of the push arm of the electromagnetic push rod. When a power outage or electromagnetic push rod failure occurs, the electromagnetic lock can be opened by manually pushing the adjustment slider, so that the vending machine can be opened in time to avoid unnecessary losses.
[0017] 2. In the present invention, when the electromagnetic lock fails, such as the electromagnetic lock transmission component is stuck, the lock hook rotation connection is stuck, the push arm of the electromagnetic push rod is stuck, and such situations cannot be automatically unlocked by the electromagnetic push rod or unlocked by adjusting the slider, unlocking can be completed by adjusting the hook arm to rotate into the cover, preventing the lock from being unable to be unlocked due to mechanical failures other than power failure.
[0018] 3. In the present invention, the electromagnetic push rod and the lock hook are transmitted through the adjustment plate, and the lock hook is connected with the adjustment rod on the adjustment plate through a movable connection groove. The movable connection groove is composed of an interference elimination section and a non-return section. When the lock hook is in a locked state, the lock hook is directly rotated by an external force, and the adjustment rod will form rotational interference with the non-return section. The non-return section has the effect of preventing theft, preventing someone from inserting objects such as cards into the door gap of the vending machine to drive the lock hook to rotate and open the door to steal goods. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is an appearance diagram of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention Figure 1 (Normal locking state); Figure 3 Schematic diagram of the internal structure of the present invention Figure 2 (Normal unlock state); Figure 4 Schematic diagram of the internal structure of the present invention Figure 3 (Unlock the state by adjusting the slider); Figure 5 Schematic diagram of the internal structure of the present invention Figure 4 (Unlock state by adjusting the head); Figure 6 This is a diagram showing the matching relationship between the component mounting base and the adjustment plate of the present invention; Figure 7 It is a structural schematic diagram of the lock hook of the present invention; Figure 8 It is a structural schematic diagram of the rotating arm of the present invention; Figure 9 It is a structural schematic diagram of the hook arm of the present invention; Figure 10 The rotation state of the hook arm of the present invention Figure 1 (The limiting elastic piece does not enter the limiting groove); Figure 11 The rotation state of the hook arm of the present invention Figure 2 (The limiting elastic piece enters the limiting groove and is locked); Figure 12 The rotation state of the hook arm of the present invention Figure 3 (The limiting elastic piece enters the limiting groove and is in unlocked state); Figure 13 It is a structural diagram of the lock hook cover of the present invention.
[0020] In the picture: 1- component mounting seat, 11- fixed shaft, 12- slideway 1, 13- through hole, 14- limit column, 15- slideway 2, 2- cover, 21- adjustment port 1, 22- adjustment port 2, 23- countersunk hole, 24- lock hook channel, 3-electromagnetic push rod, 31-spring, 4-adjustment plate, 41-adjustment rod, 42-limiting groove, 43-stroke detection piece, 5-lock hook, 51-rotating arm, 511-movable connection groove, 5111-interference elimination section, 5112-check section, 512-axis hole 1, 513-axis hole 2, 514-hinge interface, 515-accommodating groove, 516-limiting elastic sheet, 517-adjusting head, 52-hook arm, 521-hinge shaft, 522-limiting groove, 6-NFC circuit controller, 61-travel switch, 7-adjustment slider, 71-paddle, 72-top plate; 8-lock hook cover, 81-RFID cover, 82-lock hook slot. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] like Figures 1 to 6 As shown, an electromagnetic lock comprises a component mounting base 1 and a cover shell 2 matched with the component mounting base 1, an electromagnetic push rod 3 is provided on the component mounting base 1 and located in the cover shell 2, a lock hook 5 is also rotatably provided in the component mounting base 1, the electromagnetic push rod 3 and the lock hook 5 are connected by a transmission component, and the electromagnetic push rod 3 drives the lock hook 5 to extend or enter the cover shell 2 through the transmission component; an adjusting slider 7 is also slidably provided on the component mounting base 1 for pushing the push arm (moving iron core) of the electromagnetic push rod 3 to retract, and an adjusting port 21 corresponding to the adjusting slider 7 is provided on the cover shell 2, and the adjusting slider 7 can be pushed from the outside of the cover shell 2 through the adjusting port 21 to drive the push arm of the electromagnetic push rod 3 to retract, and the lock hook 5 is retracted through the transmission component during the retraction process of the push arm of the electromagnetic push rod 3; an elastic member for hindering the retraction of the push arm of the electromagnetic push rod 3 is also provided on the outside of the push arm of the electromagnetic push rod 3
[0023] like Figure 1As shown, the cover shell 2 is provided with a lock hook channel 24 for the lock hook 5 to pass through, so as to allow the lock hook 5 to enter or extend from the cover shell 2 .
[0024] It should be noted that the electromagnetic lock designed in the present invention is mainly used on the door of the vending machine, so the electromagnetic lock is in a normally locked state, that is, under the obstruction of the elastic member, the push arm of the electromagnetic push rod 3 is in an extended state, the lock hook 5 extends to the outside of the cover 2 and cooperates with the corresponding lock slot on the vending machine to form a locked state. Figure 13 As shown, according to the adaptive design, a lock hook cover 8 is provided on the vending machine body, and a lock hook groove 82 is provided on the lock hook cover 8 to cooperate with the lock hook 5. When the cabinet door is closed, the lock hook 5 cooperates with the lock hook groove 82 to form a locked state of the cabinet door; an RFID cover 81 is provided on the lock hook cover 8, and an RFID can be set in the RFID cover 81 for reading the locked state of the electromagnetic lock.
[0025] Pushing the adjustment slider 7 from the outside of the cover shell 2 drives the push arm of the electromagnetic push rod 3 to retract. During the retraction process of the push arm of the electromagnetic push rod 3, the lock hook 5 is driven to retract through the transmission component. This process is to manually adjust the electromagnetic lock to unlock. It is mainly used for manual unlocking when the power is off and the electromagnetic push rod 3 cannot be used to unlock the lock.
[0026] As a specific implementation method, Figure 2 、 Figure 3 、 Figure 6 and Figure 7 As shown, a fixed shaft 11 is provided on the component mounting seat 1, and an axial hole 512 is provided on the locking hook 5 for rotationally cooperating with the fixed shaft 11. The locking hook 5 is rotationally connected to the fixed shaft 11 through the axial hole 512.
[0027] As a specific implementation method, Figure 2 、 Figure 3 、 Figure 6 and Figure 7 As shown, the transmission assembly includes an adjustment plate 4 slidably mounted on the assembly mounting base 1. The sliding direction of the adjustment plate 4 is consistent with the extension and retraction direction of the push arm of the electromagnetic push rod 3. Specifically, the assembly mounting base 1 is provided with a second slide groove 15, and the adjustment plate 4 is slidably mounted within the second slide groove 15. One end of the adjustment plate 4 is fixedly connected to the push arm of the electromagnetic push rod 3. A columnar adjustment rod 41 is fixedly mounted on the adjustment plate 4. The lock hook 5 is provided with a movable connection groove 511, and the adjustment rod 41 extends into the movable connection groove 511. The electromagnetic push rod 3 drives the adjustment plate 4 to move, and the adjustment rod 41 moves synchronously with the adjustment plate 4. During the movement of the adjustment rod 41, the lock hook 5 is driven to rotate through the movable connection groove 511.
[0028] In this embodiment, Figure 6As shown, the adjustment plate 4 is provided with a limit slot 42 extending along the sliding direction of the adjustment plate 4. The component mounting base 1 is fixed with a limit post 14 extending into the limit slot 42. When the two ends of the limit slot 42 contact the limit post 14, the limit post 14 interferes with the movement of the adjustment plate 4. The interference contact points are when the lock hook 5 is fully extended from the cover 2 and fully retracted into the cover 2. The length of the limit slot 42 is adaptively designed based on the corresponding travel of the adjustment plate 4 and the diameter of the limit post 14. This limiting action prevents lock body malfunction caused by excessive rotation of the lock hook 5.
[0029] Furthermore, if Figure 2 and Figure 7 As shown, the movable connection groove 511 in this embodiment includes an interference elimination section 5111 and a non-return section 5112. The interference elimination section 5111 extends parallel or nearly parallel to the radial direction of the fixed shaft 11. Its primary function is to achieve connection between the locking hook 5 and the adjusting rod 41. Furthermore, when the locking hook 5 rotates, the adjusting rod 41 can move along the interference elimination section 5111, thereby preventing rotational interference caused by the rotation of the locking hook 5. After the locking hook 5 is fully extended from the housing 2, the non-return section 5112 extends parallel to the sliding direction of the adjusting rod 41. As a result, when the locking hook 5 is fully extended from the housing 2, the elastic member compresses the adjusting rod 41 within the non-return section 5112. Thus, when the locking hook 5 is directly rotated without driving the adjusting rod 41 into the interference elimination section 5111, the adjusting rod 41 will cause rotational interference with the non-return section 5112. Therefore, the function of the non-return section 5112 is to prevent theft, and to prevent someone from inserting an object such as a card into the door gap of the vending machine to drive the lock hook 5 to rotate, open the door, and steal goods.
[0030] Specifically, the adjustment plate 4 is provided with an upwardly bent and extending ear plate (not shown in the figure) on the side facing the electromagnetic push rod 3. The push arm of the electromagnetic push rod 3 is provided with a bayonet (not shown in the figure), and the ear plate is snapped into the bayonet. Of course, the fixed connection between the adjustment plate 4 and the push arm of the electromagnetic push rod 3 can also be achieved by welding, riveting, screw connection, etc. The specific arrangement method is not unique and is not limited.
[0031] Furthermore, according to the main application scenario of the vending machine of the present invention, an NFC circuit controller 6 is provided in the component mounting seat 1. The NFC circuit controller 6 is connected to the network and electrically connected to the electromagnetic push rod 3, so that customers can unlock the vending machine by using the NFC payment method.
[0032] Furthermore, the NFC circuit controller 6 is integrated with a travel switch 61, and the adjustment plate 4 is fixed with a travel detection piece 43 for detection by the travel switch 61. The travel distance of the adjustment plate 4 required for the lock hook 5 to move from the locked state to the unlocked state is the detection distance of the travel switch 61. The travel switch 61 is used to detect the travel of the adjustment plate 4, thereby controlling the electromagnetic push rod 3 to more accurately drive the lock hook 5 to open or close.
[0033] As a specific implementation method, Figure 1 、 Figure 4 and Figure 6 As shown, the component mounting base 1 is provided with a slide groove 12, the extension direction of which is consistent with the sliding direction of the adjustment plate 4, and the adjustment slider 7 is slidably provided in the slide groove 12. In this embodiment, a paddle 71 is provided at the top of the adjustment slider 7, and the paddle 71 is located in the adjustment port 21. Manually shifting the paddle 71 drives the adjustment slider 7 to move; the adjustment slider 7 is provided with a top plate 72 on the side facing the electromagnetic push rod 3, and the suspended end of the top plate 72 is connected to the push arm of the electromagnetic push rod 3. The top plate 72 and the electromagnetic push rod 3 can be connected by contact or fixed connection, and the specific connection method is not limited. It should be noted that the movement adjustment distance of the adjustment plate 4 required for the lock hook 5 to move from the locked state to the unlocked state is the minimum movable distance of the adjustment slider 7, which prevents the adjustment slider 7 from interfering with the movement of the push arm of the electromagnetic push rod 3 without human intervention.
[0034] The paddle 71 is manually moved from the outside of the cover 2 to drive the adjustment slider 7 to move, so that the adjustment slider 7 moves toward the direction of the electromagnetic push rod 3. The adjustment slider 7 drives the push arm of the electromagnetic push rod 3 to retract through the top plate 72. When the electromagnetic push rod 3 retracts, it drives the adjustment plate 4 and the adjustment rod 41 to move. Driven by the adjustment rod 41, the lock hook 5 is driven to rotate and retract into the cover 2 to achieve manual unlocking. This situation is suitable for when the electromagnetic push rod 3 fails or the power is off and the lock hook 5 cannot be opened normally by the electromagnetic push rod 3.
[0035] Specifically in this embodiment, Figure 2As shown, the elastic member is a spring 31. In the non-manual intervention state and the non-contracted state of the electromagnetic push rod 3, the spring 31 stretches and is used to keep the push arm of the electromagnetic push rod 3 in an extended state. Preferably, the spring 31 is sleeved on the outside of the push arm of the electromagnetic push rod 3, one side of the spring 31 is in contact with the main body of the electromagnetic push rod 3, and a baffle (not shown in the figure) is provided on the push arm of the electromagnetic push rod 3 and near the suspended end of the push arm. The other end of the spring 31 is in contact with the baffle. In this way, under the limitation of the baffle and the main body of the electromagnetic push rod 3, when the push arm of the electromagnetic push rod 3 contracts, the spring 31 is forced to contract at the same time. After the manual intervention or the contraction force of the electromagnetic push rod 3 is cancelled, the push arm of the electromagnetic push rod 3 is pushed out again under the elastic force of the spring 31 and the locking state of the lock hook 5 is maintained.
[0036] Furthermore, a spring is additionally provided between the adjusting slider 7 and the component mounting base 1 (not shown in the figure, it should be noted that the above-mentioned spring is provided separately and has a different structure from the spring 31). The main function of the spring between the adjusting slider 7 and the component mounting base 1 is to prevent the adjusting slider 7 from approaching the electromagnetic push rod 3, ensuring that the adjusting slider 7 does not interfere with the electromagnetic push rod 3 under normal conditions.
[0037] Furthermore, a retaining spring (not shown in the figures) is provided between the fixed shaft 11 and the locking hook 5 to increase the axial connection stability between the fixed shaft 11 and the locking hook 5 .
[0038] Furthermore, if Figure 2 、 Figure 5 、 Figures 7 to 12 As shown, the locking hook 5 includes a rotating arm 51 and a hook arm 52, and the shaft hole 512 and the movable connecting groove 511 are both arranged on the rotating arm 51; the hook arm 52 is rotatably connected to the rotating arm 51 through a hinge shaft 521, and a limiting elastic piece 516 is provided on the rotating arm 51 for hindering the rotation of the hinge shaft 521, and two limiting grooves 522 are provided on the circumference of the hinge shaft 521 to cooperate with the limiting elastic piece 516.
[0039] In the fault-free state: when the push arm of the electromagnetic push rod 3 is in the extended state (that is, the lock hook 5 is in the locked state), the rotating arm 51 is located inside the cover 2, the hook arm 52 is located outside the cover 2, and the limiting elastic piece 516 is engaged with a limiting groove 522. At this time, the hook arm 52 cooperates with the external lock groove to form a locked state (such as Figure 2 and Figure 11 shown).
[0040] Fault state: When the electromagnetic lock fails, for example, the transmission component (adjustment plate 4) is stuck, the rotation connection of the lock hook 5 (fixed shaft 11 and shaft hole 1 512) is stuck, etc., in such cases, the electromagnetic push rod 3 cannot be automatically unlocked, and the manual unlocking by adjusting the slider 7 cannot be performed. The unlocking is completed by rotating the hook arm 52 into the cover 2. At this time, the limiting elastic piece 516 is engaged with another corresponding limiting groove 522 (such as Figure 5 and Figure 12 shown).
[0041] As a specific implementation method, Figures 7 to 9 As shown, a hinge port 514 is provided on the rotating arm 51, and a second shaft hole 513 connected to the hinge port 514 is also provided on the rotating arm 51. One end of the hook arm 52 connected to the rotating arm 51 is located in the hinge port 514, and the hinge shaft 521 is cooperatively connected with the second shaft hole 513.
[0042] As a specific implementation method, Figure 8 As shown, the rotating arm 51 is also provided with a receiving groove 515 connected to the second shaft hole 513, and the limiting elastic piece 516 is arranged in the receiving groove 515. The middle section of the limiting elastic piece 516 is arranged into an arc structure and extends into the second shaft hole 513 through the connecting part of the receiving groove 515 and the second shaft hole 513.
[0043] To facilitate the adjustment of the rotation of the hook arm 52, Figure 1 、 Figures 7 to 9 As shown, an adjustment head 517 is coaxially fixed to the top end of the hinge shaft 521. The adjustment head 517 is provided with a square countersunk hole. The cover 2 is provided with a second adjustment opening 22 corresponding to the adjustment head 517. The square countersunk hole takes a hexagonal countersunk hole as an example. After the above-mentioned fault state occurs, an Allen wrench is inserted through the second adjustment opening 22 and into the hexagonal countersunk hole on the adjustment head 517. The Allen wrench is then rotated to drive the hinge shaft 521 and the hook arm 52 to rotate through the adjustment head 517 until the limiting elastic piece 516 disengages from the corresponding limiting groove 522 and re-enters the other limiting groove 522.
[0044] The limiting elastic piece 516 is located in the corresponding limiting groove 522. Under the obstruction of the limiting elastic piece 516, the hook arm 52 is prevented from rotating. When the hook arm 52 is rotated by manual intervention and adjustment, the limiting elastic piece 516 is compressed into the receiving groove 515 under the action of the driving force (such as Figure 10 As shown), the limiting elastic piece 516 disengages from the corresponding limiting groove 522, and continues to rotate so that the limiting elastic piece 516 overlaps with another limiting groove 522. Then, the limiting elastic piece 516 recovers its deformation and re-engages into the corresponding limiting groove 522 to form a new positioning effect of the hook arm 52.
[0045] In this embodiment, Figure 1 and Figure 6 As shown, the cover shell 2 is provided with a countersunk hole 23, and the component mounting base 1 is provided with a through hole 13 corresponding to the countersunk hole 23. The countersunk hole 23 and the through hole 13 are used to facilitate the use of fasteners (such as bolts, screws, etc.) to fix the electromagnetic lock to the installation location such as the vending cabinet.
[0046] It should be noted that when installing this electromagnetic lock on the door of a vending machine, a sealing cover plate is required to conceal the side with the first and second adjustment openings 21 and 22. This prevents non-work management personnel from manually adjusting the adjustment slider 7 or the adjustment head 517 to unlock the door, thereby preventing items from being stolen. The sealing cover plate on the door can be designed and installed adaptively according to the installation location of the electromagnetic lock.
[0047] Furthermore, in this embodiment, paddles 71 are provided on both sides of the adjustment slider 7. Both paddles 71 extend to the outside of the electromagnetic lock, allowing personnel to access the paddles 71 from the outside of the electromagnetic lock. After the electromagnetic lock is installed on the door of the vending machine, the paddles 71 facing the outside of the door are used by the administrator to unlock the door in the event of a power outage, etc.; the paddles facing the inside of the door are not hidden. In some larger vending machines, the administrator may be accidentally locked in while tidying up or repairing the vending machine, or a child may accidentally enter the vending machine and be locked in. In this case, the adjustment slider 7 can be operated by the paddles 71 facing the inside of the door to open the electromagnetic lock from inside the vending machine.
[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in the claims should not be construed as limiting the claim to which it relates.
Claims
1. An electromagnetic lock, characterized in that: The invention comprises a component mounting seat (1) and a cover shell (2) matched with the component mounting seat (1); an electromagnetic push rod (3) is provided on the component mounting seat (1) and located in the cover shell (2); a lock hook (5) is also rotatably provided in the component mounting seat (1); the electromagnetic push rod (3) and the lock hook (5) are matched and connected via a transmission component; the electromagnetic push rod (3) drives the lock hook (5) to extend or enter the cover shell (2) via the transmission component; an adjusting slider (7) is also slidably provided on the component mounting seat (1) for pushing the push arm of the electromagnetic push rod (3) to retract; an adjusting port (21) corresponding to the adjusting slider (7) is provided on the cover shell (2); an elastic member is also provided on the outer side of the push arm of the electromagnetic push rod (3) for preventing the push arm of the electromagnetic push rod (3) from retracting.
2. The electromagnetic lock according to claim 1, characterized in that: A fixed shaft (11) is provided on the component mounting seat (1), and a shaft hole (512) is provided on the locking hook (5) for rotationally cooperating with the fixed shaft (11). The locking hook (5) is rotationally connected to the fixed shaft (11) through the shaft hole (512).
3. The electromagnetic lock according to claim 1, characterized in that: The transmission assembly comprises an adjustment plate (4) slidably arranged on the assembly mounting seat (1), one end of the adjustment plate (4) is fixedly connected to the push arm of the electromagnetic push rod (3), an adjustment rod (41) with a columnar structure is fixedly arranged on the adjustment plate (4), and a movable connecting groove (511) is provided on the lock hook (5), and the adjustment rod (41) extends into the movable connecting groove (511).
4. The electromagnetic lock according to claim 3, characterized in that: The movable connection groove (511) comprises an interference elimination section (5111) and a non-return section (5112), and when the lock hook (5) is fully extended from the cover shell (2), the extension direction of the non-return section (5112) and the sliding direction of the adjustment rod (41) are arranged parallel to each other.
5. The electromagnetic lock according to claim 1, characterized in that: An NFC circuit controller (6) is provided in the component mounting seat (1), and the NFC circuit controller (6) is connected to a network and electrically connected to the electromagnetic push rod (3).
6. The electromagnetic lock according to claim 5, characterized in that: A travel switch (61) is integrated on the NFC circuit controller (6), and a travel detection piece (43) for detecting the travel switch (61) is fixed on the adjustment plate (4).
7. The electromagnetic lock according to claim 1, characterized in that: The locking hook (5) comprises a rotating arm (51) and a hook arm (52), wherein the hook arm (52) is rotatably connected to the rotating arm (51) via a hinge shaft (521), and a limiting elastic piece (516) is provided on the rotating arm (51) for hindering the rotation of the hinge shaft (521), and two limiting grooves (522) are provided on the circumference of the hinge shaft (521) and are matched with the limiting elastic piece (516).
8. The electromagnetic lock according to claim 7, characterized in that: The rotating arm (51) is provided with a hinge interface (514), and the rotating arm (51) is also provided with a second shaft hole (513) connected to the hinge interface (514). One end of the hook arm (52) connected to the rotating arm (51) is located in the hinge interface (514), and the hinge shaft (521) is cooperatively connected to the second shaft hole (513).
9. The electromagnetic lock according to claim 8, characterized in that: The rotating arm (51) is further provided with a receiving groove (515) communicating with the second shaft hole (513), and the limiting elastic piece (516) is arranged in the receiving groove (515). The middle section of the limiting elastic piece (516) is arranged in an arc structure and extends into the second shaft hole (513) through the communicating portion between the receiving groove (515) and the second shaft hole (513).
10. The electromagnetic lock according to claim 8, characterized in that: An adjusting head (517) is coaxially fixed to the top end of the hinge shaft (521), a square head countersunk hole is provided on the adjusting head (517), and an adjusting port 2 (22) corresponding to the adjusting head (517) is provided on the cover shell (2).