Self-service refrigerator door lock control device and method

Abstract

The invention discloses an unmanned selling refrigerator door lock control device and method, and relates to the technical field of electromagnetic locks, the unmanned selling refrigerator door lock control device comprises a door lock, the door lock comprises a mounting seat and a housing, the surface of the housing is provided with a bolt hole, the side wall of the housing is provided with a lock hook channel, and the housing is internally provided with a switch assembly and an energy-saving assembly. An electromagnetic push rod is controlled to be electrified to move a movable seat, a lock hook at the top of the movable seat performs self-locking on a lock hook groove of a cabinet door, the electromagnetic push rod is powered off after self-locking is completed, a limiting spring is limited through a permanent magnet, meanwhile, a copper sheet is arranged at the end of the electromagnetic push rod, the penetrating power of the magnet is increased, and the lock hook is kept in a self-locking state; and when the lock hook enters or extends out of the housing to achieve opening and closing of the door lock, the electromagnetic push rod does not need to be continuously powered on, and therefore the service life of the door lock is prolonged.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic lock technology, and in particular to a control device and method for door locks of unmanned refrigerated display cases. Background Technology

[0002] With the rapid iteration of IoT, AI and edge computing technologies, the unmanned retail industry has ushered in large-scale expansion and become one of the core tracks of digital transformation in the retail industry. Cabinet door lock control devices are the core security and operation support components of unmanned vending freezers. Their performance is directly related to the anti-theft security of goods, the smoothness of the transaction process and the efficiency of equipment operation and maintenance. At the same time, they need to adapt to the special requirements of the low-temperature working environment of freezers and take into account both protection reliability and ease of operation.

[0003] Traditional electromagnetic locks still have some problems in practical use:

[0004] 1. Traditional electromagnetic locks require continuous power to maintain the locked state. Long-term uninterrupted power supply leads to high energy consumption, which not only increases the overall operating energy cost of unmanned refrigerated cabinets, but also causes the coil inside the lock body to heat up continuously. Long-term high-temperature operation can easily cause coil aging and insulation layer damage, significantly shortening the service life of the door lock.

[0005] 2. Due to the weight of the cabinet door itself, the door is prone to sag and shift when it locks itself, causing misalignment between the electromagnetic lock tongue and the latch. This results in problems such as difficulty in unlocking and incomplete locking, requiring maintenance personnel to conduct regular on-site calibration and adjustment, which increases the cost of manual maintenance. Summary of the Invention

[0006] In order to overcome the above-mentioned defects in the prior art, the present invention provides a door lock control device and method for unmanned vending machines.

[0007] To achieve the above objectives, the present invention provides a door lock control device for unmanned refrigerated display cases, including a door lock. The door lock includes a mounting base, a cover, and a mating component. The cover has bolt holes on its surface and a hook channel on its side wall. The cover contains a switch assembly and an energy-saving assembly. The switch assembly includes a movable base inside the mounting base. The movable base has a limit groove on its surface. A limit post is provided between the limit groove and the cover. The movable base has a hook on its surface. The hook is connected to the energy-saving assembly via a transmission assembly. The energy-saving assembly controls the hook to pop out or retract into the cover via the transmission assembly. The top of the cover has an adjustment port. A redundant component is provided inside the adjustment port. The redundant component is used to open the door lock from inside the refrigerated display case. The mating component has a lock groove at its end.

[0008] Furthermore, the mounting base is equipped with a circuit controller, which is connected to a network and electrically connected to the switching assembly.

[0009] Furthermore, the latch pops out vertically upwards, and is supported by a latch groove on the surface of the cabinet door.

[0010] Furthermore, the energy-saving component includes an electromagnetic push rod, a limiting spring at the end of the electromagnetic push rod, a snap-fit ​​plate at the end of the electromagnetic push rod, and the snap-fit ​​plate is connected to the end of the movable seat. When the electromagnetic push rod extends or retracts, it drives the snap-fit ​​plate to push the movable seat to move.

[0011] Furthermore, a permanent magnet is provided at the top of the electromagnetic push rod. The permanent magnet is used to control the limiting spring to maintain its extension and retraction state. A copper sheet is provided at the end of the permanent magnet to increase the magnetic penetration of the permanent magnet.

[0012] Furthermore, the redundant component includes a lever disposed inside the housing, the lever sliding inside the housing, and a top plate at the end of the lever, the top plate being fixedly connected to the end of the electromagnetic push rod.

[0013] Furthermore, the housing is equipped with an RFID tag, which is used to read the locking status of the electromagnetic lock.

[0014] The second objective of this invention is to provide a method for controlling the door lock of an unmanned refrigerated display case, including the unmanned refrigerated display case door lock control device described in any one of the above-mentioned methods, comprising the following steps:

[0015] S1. During use, the freezer door is automatically locked via a switch assembly.

[0016] S2. When scanning the code to open the cabinet door for shopping, the opening and closing of the freezer door is achieved through energy-saving components, and the power consumption of the switching components during the self-locking process is reduced through energy-saving components.

[0017] S3. When the operator enters the freezer to perform maintenance, if the door lock is self-locking, the operator can unlock the door from the inside using redundant components to prevent the operator from being trapped.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In the door lock control device of this unmanned vending machine, the door lock needs to be in a self-locking state at all times, that is, the push rod of the electromagnetic push rod is in the extended state, the lock hook extends to the outside of the cover and cooperates with the lock groove corresponding to the vending machine door to form a locked state. Since the lock opening of the lock hook is upward, it can self-lock and support the lock hook groove set on the surface of the door, reduce the deformation of the door caused by its own weight, and reduce the maintenance cost of the vending machine.

[0020] 2. In this unmanned refrigerated cabinet door lock control device, when the cabinet door is closed, the electromagnetic push rod is energized to move the moving seat, causing the locking hook on the top of the moving seat to self-lock against the locking hook groove of the cabinet door. After self-locking, the electromagnetic push rod is de-energized, and the limit spring is limited by the permanent magnet. At the same time, a copper sheet is set at the end of the electromagnetic push rod to increase the penetrating force of the magnet and keep the locking hook in the self-locking state, thereby reducing the power consumption of the door lock during self-locking. When the locking hook enters or extends out of the cover to open or close the door lock, it is not necessary to continuously energize the electromagnetic push rod, thereby improving the service life of the door lock. Attached Figure Description

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

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is one of the schematic diagrams of the switching assembly structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the energy-saving component structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the mating component structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the freezer door lock structure of the present invention;

[0027] Figure 6 This is the second schematic diagram of the switching assembly structure of the present invention.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Mounting bracket; 11. Circuit controller;

[0030] 2. Cover; 21. Bolt hole; 22. Adjustment port; 23. Locking hook channel;

[0031] 3. Switch assembly; 31. Movable base; 32. Limit groove; 33. Limit post; 34. Locking hook; 35. Snap-fit ​​plate;

[0032] 4. Energy-saving components; 41. Electromagnetic push rod; 42. Limit spring; 43. Permanent magnet; 44. Copper sheet;

[0033] 5. Redundant components; 51. Paddle shifter; 52. Top plate;

[0034] 6. Fitting parts. Detailed Implementation

[0035] 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.

[0036] Example 1

[0037] A type of unmanned refrigerated display case door lock control device, based on Figure 1-5 As shown, the device includes a door lock, which comprises a mounting base 1, a cover 2, and a mating component 6. The cover 2 has bolt holes 21 on its surface and a lock hook channel 23 on its side wall. Inside the cover 2, there is a switch assembly 3 and an energy-saving assembly 4. The switch assembly 3 includes a movable base 31 located inside the mounting base 1. The movable base 31 has a limiting groove 32 on its surface, and a limiting post 33 is provided between the limiting groove 32 and the cover 2. The movable base 31 has a lock hook 34 on its surface, and the lock hook 34 is connected to the energy-saving assembly 4 through a transmission assembly. The energy-saving assembly 4 controls the lock hook 34 to pop out or retract into the cover 2 through the transmission assembly. The top of the cover 2 has an adjustment port 22, and inside the adjustment port 22, there is a redundant component 5. The redundant component 5 is used to open the door lock from inside the freezer. The mating component 6 has a lock groove at its end.

[0038] Customers obtain product information by scanning a QR code. The circuit controller 11 controls the retraction of the push rod at the end of the electromagnetic push rod 41. The retraction of the electromagnetic push rod 41 compresses the limit spring 42. When the electromagnetic push rod 41 retracts, it causes the locking plate 35 to move closer to the electromagnetic push rod 41. At this time, the moving seat 31 slides inside the mounting base 1 and moves the locking hook 34 away from the locking hook groove of the cabinet door, causing the cabinet door to open automatically. When the cabinet door is open, the electromagnetic push rod 41 is de-energized, and the permanent magnet 43 limits the push rod at the end of the electromagnetic push rod 41, thus keeping the cabinet door always open. When the shopping is completed and the cabinet door is closed, the electromagnetic push rod 41 is energized to move the movable base 31, causing the locking hook 34 on the top of the movable base 31 to self-lock against the locking hook groove of the cabinet door. After self-locking, the electromagnetic push rod 41 is de-energized, and the permanent magnet 43 limits the limit spring 42. At the same time, a copper sheet 44 is set at the end of the electromagnetic push rod 41 to increase the penetrating force of the magnet, keeping the locking hook 34 in a self-locking state, thereby reducing the power consumption of the door lock during self-locking. When the locking hook 34 enters or extends into the cover to open or close the door lock, it is not necessary to continuously energize the electromagnetic push rod 41, thereby improving the service life of the door lock.

[0039] The door lock needs to be in a self-locking state for a long time, that is, the push rod of the electromagnetic push rod 41 is in the extended state, the lock hook 34 extends to the outside of the cover 2 and cooperates with the lock groove corresponding to the vending cabinet door to form a locked state. Since the lock opening of the lock hook 34 is upward, it can self-lock and support the lock hook groove set on the surface of the cabinet door, reduce the deformation of the cabinet door caused by its own weight, and reduce the maintenance cost of the freezer.

[0040] When the operator enters the freezer to repair the door lock self-locking, the operator moves the lever 51 that passes through the outside of the cover 2, so that the top plate 52 at the end of the lever 51 pushes the push rod at the end of the electromagnetic push rod 41, thereby causing the moving base 31 to slide on one side of the electromagnetic push rod 41, so that the lock hook 34 releases the self-locking state of the lock hook groove of the cabinet door, thereby allowing the operator to quickly get out of the freezer.

[0041] In order to facilitate customers to scan the code to take the product and realize quick transactions during the use of the unmanned vending freezer, the mounting base 1 is equipped with a circuit controller 11. The circuit controller 11 is electrically connected to the switch assembly 3. The customer obtains product information by scanning the code. The circuit controller 11 controls the push rod at the end of the electromagnetic push rod 41 to retract and drive the moving base 31 to move. During the movement of the moving base 31, the limiting groove 32 is limited by the limiting post 33 to move horizontally. During the movement of the limiting groove 32, the locking hook 34 rotates into the cover 2, thereby releasing the self-locking state of the locking hook groove of the lock hook 34 on the cabinet door, so that the freezer door lock opens automatically and realizes quick transactions.

[0042] Considering that the door lock is mainly used on the doors of vending machines, and the doors are prone to sagging due to gravity over time, requiring regular maintenance and increasing operating costs, the locking hook 34 is designed to extend vertically upwards. The locking hook 34 supports the locking hook groove on the door surface. Since the door lock needs to be in a self-locking state for extended periods (i.e., the electromagnetic push rod 41 is extended), the locking hook 34 extends outside the housing 2 and engages with the corresponding locking groove on the vending machine door to form a locked state. Because the locking opening of the locking hook 34 faces upwards, it can self-lock and support the locking hook groove on the door surface, reducing deformation caused by the door's own weight and lowering the maintenance costs of the refrigerated display case.

[0043] When the freezer is small, if the maintenance personnel cannot fully enter the cabinet, the cabinet door cannot lock itself when it is open for maintenance, so there is no need to install redundant components 5 inside the cover 2.

[0044] In practical use, the RFID card serves as the identification signal for the lock to close. After scanning the code, the lock automatically unlocks, allowing the door to be opened and products to be freely taken out. Once the products are taken out, the door automatically closes. At this time, the RFID card will reach the RFID sensing area of ​​the lock as the door closes. After the lock detects the RFID, the locking hook 34 engages and reports the door closing and locking signal to the vending machine for settlement and deduction.

[0045] In practical use, to ensure smooth door lock operation during opening and closing, the electromagnetic push rod 41 needs to be continuously energized. This can easily cause the coil in the electromagnetic push rod 41 to overheat, increasing power consumption and affecting the lifespan of the door lock. Therefore, the energy-saving component 4 includes an electromagnetic push rod 41, with a limiting spring 42 at its end and a locking plate 35 at its end. The locking plate 35 is connected to the end of the movable base 31. When the electromagnetic push rod 41 extends or retracts, it drives the locking plate 35. 5. The moving base 31 is pushed to move. The top of the electromagnetic push rod 41 is provided with a permanent magnet 43. The permanent magnet 43 is used to control the limit spring 42 to maintain its extension state. The end of the permanent magnet 43 is provided with a copper plate 44. The copper plate 44 increases the magnetic penetration force of the permanent magnet 43. Under the resistance of the elastic element, the push arm of the switch assembly 3 is in the extended state. The redundant locking hook assembly 5 extends to the outside of the cover 2 and cooperates with the corresponding locking groove on the vending machine to form a locked state. When scanning the code to open the cabinet door for shopping, the electromagnetic push rod 41 pushes... The rod retracts and compresses the limiting spring 42. When the electromagnetic push rod 41 retracts, it drives the locking plate 35 to move closer to the electromagnetic push rod 41. At this time, the moving seat 31 slides inside the mounting base 1 and drives the locking hook 34 to rotate away from the locking hook groove of the cabinet door, so that the cabinet door opens automatically. When the cabinet door is open, the electromagnetic push rod 41 is de-energized, and the permanent magnet 43 limits the push rod at the end of the electromagnetic push rod 41, so that the cabinet door is always in the open state. When the shopping is completed and the cabinet door is closed, the electromagnetic push rod 41 is energized to move the moving seat 31 closer to the mounting base 1. 1. Move the locking hook 34 on the top of the moving base 31 to rotate the locking hook of the cabinet door into the groove for self-locking. After self-locking, de-energize the electromagnetic push rod 41 and limit the limit spring 42 through the permanent magnet 43. At the same time, a copper sheet 44 is set at the end of the electromagnetic push rod 41 to increase the penetration force of the magnet and keep the locking hook 34 in the self-locking state, thereby reducing the power consumption of the door lock during self-locking. When the locking hook 34 enters or extends into the cover to open or close the door lock, it is not necessary to continuously energize the electromagnetic push rod 41, thereby improving the service life of the door lock.

[0046] Considering that during freezer maintenance, the door may lock itself when the operator enters the freezer, trapping the operator inside and causing inconvenience, the redundant component 5 includes a lever 51 located inside the housing 2. The lever 51 slides inside the housing 2, and its end has a top plate 52 fixedly connected to the end of the electromagnetic push rod 41. When the operator enters the freezer for maintenance and the door lock locks itself, the operator can move the lever 51, which extends through the outside of the housing 2, causing the top plate 52 at the end of the lever 51 to push the push rod at the end of the electromagnetic push rod 41. This causes the moving base 31 to slide on one side of the electromagnetic push rod 41, releasing the lock hook 34 from the lock hook groove of the freezer door, allowing the operator to quickly exit the freezer.

[0047] Example 2

[0048] To prevent unauthorized unlocking of the freezer during use, please refer to the following: Figure 6 As shown, two positive and negative wires are added inside the electromagnetic push rod 41 and pulled to the top of the cabinet, so that maintenance personnel can connect the power supply to directly control the coil to unlock, bypassing the control system of the vending machine. This function is known only to maintenance personnel, so there is no need to worry about the door lock being damaged. At the same time, the redundant component 5 inside the cover 2 does not need to be set.

[0049] The second objective of this invention is to provide a method for controlling the door lock of an unmanned refrigerated display case, including the unmanned refrigerated display case door lock control device described in any one of the above-mentioned methods, comprising the following steps:

[0050] S1. During use, the freezer door is automatically locked via switch assembly 3.

[0051] S2. When scanning the code to open the cabinet door for shopping, the opening and closing of the freezer door is achieved through the energy-saving component 4, and the power consumption of the switch component 3 during the self-locking process is reduced through the energy-saving component 4.

[0052] S3. When the operator enters the freezer to perform maintenance, if the door lock is self-locking, the operator can unlock the door from the inside using the redundant component 5 to prevent the operator from being trapped.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A door lock control device for an unmanned refrigerated display case, characterized in that: The lock includes a mounting base (1), a housing (2), and a mating component (6). The housing (2) has bolt holes (21) on its surface and a lock hook channel (23) on its side wall. Inside the housing (2) are a switch assembly (3) and an energy-saving assembly (4). The switch assembly (3) includes a movable base (31) located inside the mounting base (1). A limiting groove (32) is formed on the surface of the movable base (31), and a limiting post is provided between the limiting groove (32) and the housing (2). 33), the surface of the movable seat (31) is provided with a locking hook (34), the locking hook (34) and the energy-saving component (4) are connected by a transmission component, the energy-saving component (4) controls the locking hook (34) to pop out or retract into the cover (2) through the transmission component, the top of the cover (2) is provided with an adjustment port (22), the adjustment port (22) is provided with a redundant component (5), the redundant component (5) is used to open the door lock from inside the freezer, and the end of the mating part (6) is provided with a lock groove.

2. The unmanned refrigerated display case door lock control device according to claim 1, characterized in that, The mounting base (1) is equipped with a circuit controller (11), which is connected to the network and electrically connected to the switching assembly (3).

3. The unmanned refrigerated display case door lock control device according to claim 2, characterized in that, The locking hook (34) pops out vertically upward, and supports the locking hook groove of the mating part (6) on the surface of the cabinet door through the locking hook (34).

4. The unmanned refrigerated display case door lock control device according to claim 1, characterized in that, The energy-saving component (4) includes an electromagnetic push rod (41), the end of which is provided with a limiting spring (42), and the end of which is provided with a snap-fit ​​plate (35). The snap-fit ​​plate (35) is connected to the end of the movable seat (31). When the electromagnetic push rod (41) moves in extension and retraction, it drives the snap-fit ​​plate (35) to push the movable seat (31) to move.

5. The unmanned refrigerated display case door lock control device according to claim 4, characterized in that, The electromagnetic push rod (41) is provided with a permanent magnet (43) at the top. The permanent magnet (43) is used to control the limiting spring (42) to maintain the extension state. The permanent magnet (43) is provided with a copper sheet (44) at the end. The copper sheet (44) increases the magnetic penetration of the permanent magnet (43).

6. The unmanned refrigerated display case door lock control device according to claim 1, characterized in that, The redundant component (5) includes a paddle (51) disposed inside the housing (2), the paddle (51) slides inside the housing (2), and the end of the paddle (51) is provided with a top plate (52), the top plate (52) being fixedly connected to the end of the electromagnetic push rod (41).

7. The unmanned refrigerated display case door lock control device according to claim 1, characterized in that, The housing (2) is equipped with an RFID tag, which is used to read the locking status of the electromagnetic lock.

8. A method for controlling the door lock of an unmanned refrigerated display case, implemented by the unmanned refrigerated display case door lock control device according to any one of claims 1-7, characterized in that: Includes the following steps: S1. During use, the freezer door is self-locked by the switch assembly (3); S2. When scanning the code to open the cabinet door for shopping, the opening and closing of the freezer door is achieved through the energy-saving component (4), and the power consumption of the switching component (3) during the self-locking process is reduced through the energy-saving component (4). S3. When the operator enters the freezer to perform maintenance, the door lock is self-locked. The operator can unlock the door from the inside through the redundant component (5) to avoid the operator being trapped.

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