Electromagnetic lock and self-service vending device

Abstract

The utility model relates to the technical field of automatic vending, in particular to an electromagnetic lock and a self-service vending device. The electromagnetic lock comprises a shell, an electromagnet, a spring bolt and an emergency part, the electromagnet is arranged in the shell and comprises a solenoid, an armature and a compressed spring, the armature is connected with the solenoid in an inserted mode and can move relative to the solenoid to have a first position and a second position, and the first end of the armature is in transmission connection with the spring bolt in the moving direction of the armature; when the armature is located at the first position, the armature drives the spring bolt to stretch out of the shell, when the armature is located at the second position, the armature drives the spring bolt to retract back to the shell, the armature is sleeved with the compressed spring and used for making the armature always have the trend of moving towards the first position, and the emergency piece is linear and extends in the moving direction of the armature. The first end of the emergency piece is connected with the second end of the armature, and the second end of the emergency piece extends out of the shell. According to the electromagnetic lock, the service life of the electromagnet is ensured, so that the service lives of the electromagnetic lock and the self-service vending device applying the electromagnetic lock are long.

Description

Technical Field

[0001] This utility model relates to the field of automatic vending technology, and in particular to an electromagnetic lock and an unmanned vending device. Background Technology

[0002] Existing unmanned vending machines, such as self-service lockers and vending machines, typically use electromagnetic locks to lock the doors. The electromagnetic lock is usually installed in the cabinet and includes a housing and an electromagnet and latch installed within the housing. The electromagnet includes a solenoid, an armature, and a compression spring. The first end of the armature is inserted into the solenoid, and the compression spring is sleeved on the armature and abuts against the solenoid. The pressure of the compression spring causes the armature to always tend to extend out of the solenoid. When the solenoid is energized, it drives the armature to retract against the pressure of the compression spring; when the solenoid is de-energized, the armature extends under the pressure of the compression spring. The latch is connected to the second end of the armature via a transmission mechanism. When the armature extends or retracts, it drives the latch to extend or retract relative to the housing. A corresponding locking element is installed on the cabinet door. When the cabinet door is in the closed position, the extended latch engages with the locking element to lock the door in place. To prevent cabinet doors from becoming unopenable due to abnormal power outages, existing electromagnetic locks typically include an emergency unlocking mechanism. This mechanism is connected to the second end of the armature. In the event of a power outage, pulling the emergency unlocking mechanism retracts the bolt relative to the housing, thus separating the bolt from the locking element. However, when this type of electromagnetic lock pulls the emergency unlocking mechanism, the force exerted on the armature by the mechanism forms an angle with the direction of the armature's extension and retraction. This causes the armature to deflect relative to the solenoid, resulting in one side of the armature rubbing against the solenoid. Prolonged use will affect the electromagnet's lifespan, thus leading to a short service life for this type of electromagnetic lock. Utility Model Content

[0003] The purpose of this invention is to provide an electromagnetic lock and an unmanned vending device to improve the service life of the electromagnetic lock.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An electromagnetic lock includes a housing, an electromagnet, a latch, and an emergency component. The electromagnet is disposed within the housing and includes a solenoid, an armature, and a compression spring. The armature is inserted into the solenoid and is movable relative to the solenoid, having a first position and a second position. Along the direction of movement of the armature, the first end of the armature is throttle-connected to the latch. When the armature is in the first position, the armature drives the latch to extend out of the housing; when the armature is in the second position, the armature drives the latch to retract into the housing. The compression spring is sleeved on the armature to ensure that the armature always has a tendency to move towards the first position. The emergency component is linear and extends along the direction of movement of the armature. The first end of the emergency component is connected to the second end of the armature, and the second end of the emergency component extends outside the housing.

[0006] As an alternative, the housing includes a first wall and a second wall that are spaced apart from each other along the direction of movement of the armature, the second end of the emergency component extends through the first wall to the outside of the housing, and the latch extends out of or retracts from the housing through the second wall.

[0007] As an alternative, the housing includes a first housing and a second housing, the first housing having an opening, the second housing being detachably connected to the first housing and used to close the opening; the electromagnet also includes a frame, the solenoid being fixedly connected to the frame, and the frame being detachably connected to the first housing through the opening.

[0008] As an optional embodiment, the first housing is rectangular in shape, and the opening includes a first opening and a second opening that are interconnected. The first housing includes a first wall and a third wall that are connected at an angle, with the first wall opposite to the first opening and the third wall opposite to the second opening. The first wall has a slot that communicates with the second opening. The second housing includes a second wall and a fourth wall that are connected at an angle, with the second wall used to close the first opening and the fourth wall used to close the second opening. The second wall has a through hole, through which the latch extends or retracts into the housing, and the second end of the emergency component protrudes from the housing through the slot.

[0009] As an optional solution, the electromagnetic lock also includes a plug and a power cord. The plug is embedded in the slot and arranged side by side with the emergency component in the slot. The plug is provided with a wire hole. The first end of the power cord is connected to the solenoid and the second end of the power cord extends out of the housing through the wire hole.

[0010] As an optional solution, the second housing further includes a sleeve connected to the second wall, the sleeve being coaxial with and communicating with the through hole; the locking tongue is inserted into the sleeve, and the locking tongue is always located inside the sleeve when it extends or retracts relative to the housing.

[0011] As an optional solution, the armature is driven to the latch via a linkage assembly. The linkage assembly includes a first link and a second link. The first end of the first link is hinged to the first end of the armature via a first shaft, and the second end of the first link is hinged to the second link via a second shaft. The second link is rotatably mounted on the housing via a pivot, and the pivot and the second shaft are parallel and spaced apart. The second link is also driven to the latch. When the armature moves between the first position and the second position, the first link drives the second link to rotate around the axis of the pivot, causing the second link to extend and retract the latch relative to the housing.

[0012] As an alternative, along the direction of movement of the armature, a first opening and a second opening are respectively provided at both ends of the solenoid, the first end of the armature extends out of the solenoid through the first opening, and the second end of the armature extends out of the solenoid through the second opening.

[0013] As an optional solution, the emergency component is a nylon rope.

[0014] An unmanned vending machine includes a cabinet, a cabinet door, and an electromagnetic lock as described above. The front of the cabinet has a retrieval slot, and the top of the cabinet has an emergency exit and an emergency cover for closing the emergency exit. The cabinet door is pivotally connected to the cabinet and can rotate about the pivot axis. The cabinet door has an open position for opening the retrieval slot and a closed position for closing the retrieval slot. A locking element is installed on the cabinet door. The electromagnetic lock is installed on the cabinet, and the second end of the emergency element extends into the emergency exit. When the cabinet door is in the closed position and the latch is extended, the latch engages with the locking element to lock the position of the cabinet door.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides an electromagnetic lock, which includes a housing, an electromagnet, a latch, and an emergency component. The electromagnet is disposed inside the housing and includes a solenoid, an armature, and a compression spring. The armature is inserted into the solenoid and can move relative to the solenoid to have a first position and a second position. Along the movement direction of the armature, the first end of the armature is drivenly connected to the latch. When the armature is in the first position, the armature drives the latch to extend out of the housing. When the armature is in the second position, the armature drives the latch to retract into the housing. The compression spring is sleeved on the armature to ensure that the armature always has a tendency to move towards the first position. The emergency component is linear and extends along the movement direction of the armature. The first end of the emergency component is connected to the second end of the armature, and the second end of the emergency component extends outside the housing. In the electromagnetic lock provided in this embodiment, the emergency component is connected to the second end of the armature. The emergency component extends along the movement direction of the armature. When the emergency component is pulled to unlock, the force exerted by the emergency component on the armature is in the same direction as the movement of the armature. The armature will not be deflected, and therefore will not rub against the solenoid, thus ensuring the lifespan of the electromagnet. Therefore, the electromagnetic lock has a long service life.

[0017] This utility model also provides an unmanned vending device. By applying the aforementioned electromagnetic lock, the unmanned vending device ensures the lifespan of the electromagnet, thereby improving the service life of both the electromagnetic lock and the unmanned vending device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the unmanned vending device provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the electromagnetic lock provided in an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the electromagnetic lock provided in this embodiment of the present invention when the bolt is in the first position;

[0021] Figure 4 This is a cross-sectional view of the electromagnetic lock provided in this embodiment of the present invention when the bolt is in the second position;

[0022] Figure 5 This is a first exploded view of the electromagnetic lock provided in this embodiment of the present invention;

[0023] Figure 6 This is an exploded view of the second structure of the electromagnetic lock provided in this embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the first structure of the first housing of the electromagnetic lock provided in this embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the second structure of the first housing of the electromagnetic lock provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 10. Electromagnetic lock; 20. Cabinet body; 201. Retrieval port; 30. Cabinet door; 40. Locking components; 50. Mechanical lock; 60. Handle; 70. Emergency cover;

[0028] 1. Shell; 11. First shell; 111. First opening; 112. Second opening; 113. First wall; 105. Slot; 114. Third wall; 101. Through hole; 102. Boss; 103. Limiting groove; 12. Second shell; 121. Second wall; 104. Through hole; 122. Fourth wall; 123. Sleeve;

[0029] 2. Electromagnet; 21. Solenoid; 22. Armature; 23. Compression spring; 24. Frame;

[0030] 3. Locking tongue; 31. Limiting pin;

[0031] 4. Emergency parts; 41. Pull ring;

[0032] 5. Linkage assembly; 51. First link; 52. Second link; 53. First shaft; 54. Second shaft; 55. Pivot;

[0033] 6. End cap; 61. Wiring hole; 7. Sensor; 8. Control board; 9. Signal receiver. Detailed Implementation

[0034] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figure 1 As shown, this embodiment provides an unmanned vending device, which includes a cabinet 20, a cabinet door 30, and an electromagnetic lock 10. The front of the cabinet 20 is provided with a retrieval port 201, and the top of the cabinet 20 is provided with an emergency port and an emergency cover 70 for closing the emergency port. The cabinet door 30 is pivotally connected to the cabinet 20 and can rotate around the pivot axis. The cabinet door 30 has an open position for opening the retrieval port 201 and a closed position for closing the retrieval port 201. A locking member 40 is installed on the cabinet door 30. The electromagnetic lock 10 is installed on the cabinet 20. When the cabinet door 30 is in the closed position and the locking tongue 3 is extended, the locking tongue 3 and the locking member 40 are engaged to lock the position of the cabinet door 30.

[0039] like Figures 1 to 8 As shown, the electromagnetic lock 10 provided in this embodiment includes a housing 1, an electromagnet 2, a latch 3, and an emergency component 4. The electromagnet 2 is disposed inside the housing 1 and includes a solenoid 21, an armature 22, and a compression spring 23. The solenoid 21 is fixedly connected to the housing 1. The armature 22 is inserted into the solenoid 21 and can move relative to the solenoid 21 to have a first position and a second position. Along the movement direction of the armature 22, the first end of the armature 22 is connected to the latch 3. When the armature 22 is in the first position, the armature 22 drives the latch 3 to extend out of the housing 1. When the armature 22 is in the second position, the armature 22 drives the latch 3 to retract into the housing 1. The compression spring 23 is sleeved on the armature 22 to make the armature 22 always have a tendency to move towards the first position. The emergency component 4 is linear and extends along the movement direction of the armature 22. The first end of the emergency component 4 is connected to the second end of the armature 22. The second end of the emergency component 4 extends outside the housing 1 and into the emergency opening.

[0040] When the cabinet door 30 is closed, the solenoid 21 is de-energized. The armature 22 moves to the first position under the pressure of the compression spring 23. The armature 22 drives the latch 3 to extend out of the housing 1. The latch 3 cooperates with the locking element 40 on the cabinet door 30 to lock the position of the cabinet door 30. When the door needs to be opened, the solenoid 21 is energized to attract the armature 22, causing the armature 22 to move to the second position against the pressure of the compression spring 23. The armature 22 drives the latch 3 to retract into the housing 1, and the latch 3 separates from the locking element 40. At this time, the cabinet door 30 can be opened. If there is an unexpected power outage and the solenoid 21 cannot be energized, the maintenance personnel open the emergency cover 70 and pull the second end of the emergency element 4, which can move the armature 22 to the second position. The armature 22 drives the latch 3 to retract into the housing 1, and the latch 3 separates from the locking element 40, so the cabinet door 30 can be opened. In the electromagnetic lock 10 provided in this embodiment, the emergency component 4 is connected to the second end of the armature 22. The emergency component 4 is linear and extends along the movement direction of the armature 22. When the emergency component 4 is pulled to unlock, the force exerted by the emergency component 4 on the armature 22 is in the same direction as the movement of the armature 22. The armature 22 will not deflect, and therefore will not rub against the solenoid 21, ensuring the lifespan of the electromagnet 2. Therefore, the electromagnetic lock 10 has a long service life. The unmanned vending device provided in this embodiment, by applying the above-mentioned electromagnetic lock 10, ensures the lifespan of the electromagnet 2, thereby improving the service life of the unmanned vending device.

[0041] Optionally, in this embodiment, the extension and retraction direction of the latch 3 is parallel to the movement direction of the armature 22, thereby reducing the size of the electromagnetic lock 10 along the movement direction perpendicular to the armature 22.

[0042] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, the emergency component 4 is a nylon rope. Nylon rope has the advantages of low cost, strong installation adaptability, and is suitable for transmitting external force over long distances. Optionally, the second end of the emergency component 4 is provided with a pull ring 41, which extends into the emergency opening for gripping and pulling the emergency component 4. In other embodiments, the emergency component 4 may be a rod-shaped structure or a plate-shaped structure.

[0043] In this embodiment, as Figure 3 and Figure 4As shown, the housing 1 includes a first wall 113 and a second wall 121 spaced apart from each other along the direction of movement of the armature 22. The second end of the emergency component 4 extends out of the housing 1 through the first wall 113, and the latch 3 extends out of or retracts from the housing 1 via the second wall 121. The latch 3 extends out of or retracts from the housing 1 via the second wall 121, and the second wall 121 and the first wall 113 are spaced apart along the direction of movement of the armature 22, thus reducing the size of the electromagnetic lock 10 perpendicular to the direction of movement of the armature 22. In other embodiments, the latch 3 extends out of or retracts from the housing 1 via a third wall 114 connected at an angle to the first wall 113, and the extension / retraction direction of the latch 3 is perpendicular to the direction of movement of the armature 22.

[0044] In this embodiment, as Figures 2-5 As shown, the housing 1 includes a first housing 11 and a second housing 12. The first housing 11 has an opening, and the second housing 12 is detachably connected to the first housing 11 and used to close the opening. The electromagnet 2 also includes a frame 24, and a solenoid 21 is fixedly connected to the frame 24. The frame 24 is detachably connected to the first housing 11 through the opening. In this embodiment, when installing the electromagnet 2, the electromagnet 2 is installed inside the first housing 11 through the opening, then the frame 24 is fastened to the first housing 11 with screws, and finally the second housing 12 is connected to the first housing 11, making the installation simple.

[0045] Optionally, such as Figures 6-8 As shown, the first housing 11 is rectangular in shape, with openings including a first opening 111 and a second opening 112 that are interconnected. The first housing 11 includes a first wall 113 and a third wall 114 that are connected at an angle. The first wall 113 is opposite to the first opening 111, and the third wall 114 is opposite to the second opening 112. The first wall 113 has a slot 105 that is connected to the second opening 112. The second housing 12 includes a second wall 121 and a fourth wall 122 that are connected at an angle. The second wall 121 is used to close the first opening 111, and the fourth wall 122 is used to close the second opening 112. The second wall 121 has a through hole 104. The locking tongue 3 extends out of or retracts into the housing 1 through the through hole 104, and the second end of the emergency component 4 protrudes out of the housing 1 through the slot 105. When installing the electromagnetic lock 10, first connect the emergency component 4 to the second end of the armature 22. Then, place the electromagnet 2 and the emergency component 4 together inside the first housing 11 through the opening. The emergency component 4 is directly installed into place through the second opening 112 and the slot 105, making installation simple. Optionally, the third wall 114 is provided with a through hole 101, through which fasteners pass and are securely connected to the frame 24 of the electromagnet 2. Optionally, the inner wall of the third wall 114 is also provided with a boss 102, which is inserted into the positioning hole on the frame 24 to position the frame 24 within the first housing 11.

[0046] Optionally, such as Figure 3 and Figure 4 As shown, the latch 3 is provided with a limiting post 31, which extends in a direction perpendicular to the extension and retraction of the latch 3. The third wall 114 is provided with a limiting groove 103, which extends in a direction perpendicular to the extension and retraction of the latch 3. The limiting post 31 is inserted into the limiting groove 103 to limit the extension and retraction direction of the latch 3 and to provide guidance for the extension and retraction movement of the latch 3.

[0047] Optionally, such as Figure 4 and Figure 6 As shown, the electromagnetic lock 10 also includes a plug 6 and a power cord (not shown in the figure). The plug 6 is embedded in the slot 105, and the plug 6 and the emergency component 4 are arranged side by side in the slot 105. The plug 6 is provided with a wire hole 61. The first end of the power cord is connected to the solenoid 21, and the second end of the power cord passes through the wire hole 61 and extends to the outside of the housing 1. In this embodiment, by arranging the plug 6 and the emergency component 4 side by side in the slot 105, the plug 6 occupies part of the space in the slot 105, making the range of movement of the emergency component 4 in the slot 105 small and its position relatively stable. Moreover, the power cord of the electromagnet 2 passes through the wire hole 61, avoiding contact wear between the power cord and the emergency component 4. Specifically, in this embodiment, the electromagnetic lock 10 also includes a control board 8, which is fixedly connected to the first housing 11 and / or the second housing 12, and electrically connected to the solenoid 21. Optionally, the electromagnetic lock 10 also includes a signal receiver 9, which is a magnetic signal or radio frequency signal receiver. A signal transmitter is correspondingly provided on the cabinet door 30. When the cabinet door 30 is closed, the signal transmitter and the signal receiver 9 are opposite each other. The signal receiver 9 receives the signal emitted by the signal transmitter, and can determine that the cabinet door 30 is closed. The armature 22 is driven to move to the first position, so that the bolt 3 extends. Optionally, the electromagnetic lock 10 also includes a sensor 7, which is electrically connected to the control board 8. The sensor 7 is installed in the housing 1 and is used to detect whether the bolt 3 extends.

[0048] In this embodiment, as Figure 5 and Figure 6 As shown, the second housing 12 also includes a sleeve 123, which is connected to the second wall 121. The sleeve 123 is coaxial with and communicates with the through hole 104. The locking tongue 3 is inserted into the sleeve 123, and the locking tongue 3 is always located inside the sleeve 123 when it extends or retracts relative to the housing 1. By setting the sleeve 123, the extension and retraction direction of the locking tongue 3 is restricted, ensuring the smoothness and reliability of the extension and retraction movement of the locking tongue 3. Specifically, the first end of the sleeve 123 is connected to the second wall 121, and the second end of the sleeve 123 extends into the housing 1.

[0049] In this embodiment, as Figures 3-5As shown, the armature 22 is connected to the latch 3 via a linkage assembly 5. The linkage assembly 5 includes a first link 51 and a second link 52. The first end of the first link 51 is hinged to the first end of the armature 22 via a first shaft 53, and the second end of the first link 51 is hinged to the second link 52 via a second shaft 54. The second link 52 is rotatably mounted on the housing 1 via a pivot 55, with the pivot 55 and the second shaft 54 ​​arranged parallel and spaced apart. The second link 52 is also connected to the latch 3. When the armature 22 moves between the first position and the second position, the first link 51 drives the second link 52 to rotate around the axis of the pivot 55, causing the second link 52 to extend and retract the latch 3 relative to the housing 1. In this embodiment, the linkage assembly 5 is used to achieve the transmission connection between the first end of the armature 22 and the latch 3, which can change the stroke of the latch 3 and has a simple structure.

[0050] Optionally, in this embodiment, as Figure 3 and Figure 4 As shown, along the direction of movement of the armature 22, the two ends of the solenoid 21 are respectively provided with a first opening and a second opening. The first end of the armature 22 extends out of the solenoid 21 through the first opening, and the second end of the armature 22 extends out of the solenoid 21 through the second opening. This arrangement allows the first end of the armature 22 to be connected to the locking tongue 3 outside the solenoid 21, and the second end of the armature 22 to be connected to the emergency component 4 outside the solenoid 21. Therefore, the size of the solenoid 21 can be kept relatively small along the direction of movement perpendicular to the armature 22.

[0051] Optionally, such as Figure 1 As shown, the unmanned vending device also includes a mechanical lock 50, which is installed on the cabinet 20 or the emergency cover 70 and is used to lock the position of the emergency cover 70 when the emergency opening is closed. Since the specific structure of the mechanical lock 50 is prior art, it will not be described in detail here.

[0052] Optionally, in this embodiment, the side wall of the cabinet 20 includes an outer wall, an inner wall, a cabinet opening strip, and a foam layer. The foam layer fills the space between the outer wall and the inner wall. The cabinet opening strip connects the ends of both the inner wall and the outer wall. The side wall has a groove that penetrates the inner wall, the cabinet opening strip, and the foam layer. The housing 1 is embedded in the groove and is fastened to the housing 1 by fasteners passing through the inner wall. The foam layer contains a long tube that connects the housing 1 and the emergency outlet. The second end of the emergency component 4 extends through the long tube into the emergency outlet.

[0053] Optionally, in this embodiment, a handle 60 is provided on the cabinet door 30, so that the cabinet door 30 can be operated by holding the handle 60, so that the cabinet door 30 can be rotated to the open position or the closed position.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic lock, characterized in that, The device includes a housing (1), an electromagnet (2), a locking tongue (3), and an emergency component (4). The electromagnet (2) is disposed inside the housing (1). The electromagnet (2) includes a solenoid (21), an armature (22), and a compression spring (23). The armature (22) is inserted into the solenoid (21) and can move relative to the solenoid (21) to have a first position and a second position. Along the direction of movement of the armature (22), the first end of the armature (22) is connected to the locking tongue (3). When the armature (22) is in the first position, the armature (22)... 2) Drive the latch (3) to extend out of the housing (1). When the armature (22) is in the second position, the armature (22) drives the latch (3) to retract into the housing (1). The compression spring (23) is sleeved on the armature (22) to make the armature (22) always have a tendency to move towards the first position. The emergency component (4) is linear and extends along the movement direction of the armature (22). The first end of the emergency component (4) is connected to the second end of the armature (22), and the second end of the emergency component (4) extends out of the housing (1).

2. The electromagnetic lock according to claim 1, characterized in that, The housing (1) includes a first wall (113) and a second wall (121) that are spaced apart from each other along the direction of movement of the armature (22). The second end of the emergency component (4) extends through the first wall (113) to the outside of the housing (1). The latch (3) extends out of or retracts from the housing (1) through the second wall (121).

3. The electromagnetic lock according to claim 1, characterized in that, The housing (1) includes a first housing (11) and a second housing (12). The first housing (11) has an opening, and the second housing (12) is detachably connected to the first housing (11) and used to close the opening. The electromagnet (2) also includes a frame (24). The solenoid (21) is fixedly connected to the frame (24), and the frame (24) is detachably connected to the first housing (11) through the opening.

4. The electromagnetic lock according to claim 3, characterized in that, The first housing (11) is rectangular in shape. The opening includes a first opening (111) and a second opening (112) that are interconnected. The first housing (11) includes a first wall (113) and a third wall (114) that are connected at an angle. The first wall (113) is opposite to the first opening (111), and the third wall (114) is opposite to the second opening (112). The first wall (113) is provided with a slot (105), and the slot (105) is connected to the second opening (112). 12) Connected; the second housing (12) includes a second wall (121) and a fourth wall (122) connected at an angle, the second wall (121) is used to close the first opening (111), the fourth wall (122) is used to close the second opening (112), the second wall (121) is provided with a through hole (104), the latch (3) extends out of or retracts into the housing (1) through the through hole (104), and the second end of the emergency component (4) passes through the housing (1) through the slot (105).

5. The electromagnetic lock according to claim 4, characterized in that, The electromagnetic lock also includes a plug (6) and a power cord. The plug (6) is embedded in the slot (105). The plug (6) and the emergency component (4) are arranged side by side in the slot (105). The plug (6) is provided with a wire hole (61). The first end of the power cord is connected to the solenoid (21). The second end of the power cord passes through the wire hole (61) and extends to the outside of the housing (1).

6. The electromagnetic lock according to claim 4, characterized in that, The second housing (12) further includes a sleeve (123), which is connected to the second wall (121). The sleeve (123) is coaxial with and communicates with the through hole (104). The locking tongue (3) is inserted into the sleeve (123), and the locking tongue (3) is always located inside the sleeve (123) when it extends or retracts relative to the housing (1).

7. The electromagnetic lock according to any one of claims 1 to 6, characterized in that, The armature (22) is connected to the latch (3) via a linkage assembly (5). The linkage assembly (5) includes a first link (51) and a second link (52). The first end of the first link (51) is hinged to the first end of the armature (22) via a first shaft (53). The second end of the first link (51) is hinged to the second link (52) via a second shaft (54). The second link (52) is rotatably mounted on the housing (1) via a pivot (55), and the pivot (55) and the second shaft (54) are parallel and spaced apart. The second link (52) is also connected to the latch (3). When the armature (22) moves between the first position and the second position, the first link (51) drives the second link (52) to rotate around the axis of the pivot (55), causing the second link (52) to extend and retract the latch (3) relative to the housing (1).

8. The electromagnetic lock according to any one of claims 1 to 6, characterized in that, Along the direction of movement of the armature (22), a first opening and a second opening are respectively provided at both ends of the solenoid (21). The first end of the armature (22) extends out of the solenoid (21) through the first opening, and the second end of the armature (22) extends out of the solenoid (21) through the second opening.

9. The electromagnetic lock according to any one of claims 1 to 6, characterized in that, The emergency component (4) is a nylon rope.

10. An unmanned vending machine, characterized in that, The system includes a cabinet (20), a cabinet door (30), and an electromagnetic lock as described in any one of claims 1 to 9. The cabinet (20) has a retrieval port (201) at the front and an emergency port and an emergency cover (70) for closing the emergency port at the top. The cabinet door (30) is pivotally connected to the cabinet (20) and can rotate around the pivot axis. The cabinet door (30) has an open position for opening the retrieval port (201) and a closed position for closing the retrieval port (201). A locking element (40) is installed on the cabinet door (30). The electromagnetic lock is installed on the cabinet (20), and the second end of the emergency element (4) extends into the emergency port. When the cabinet door (30) is in the closed position and the latch (3) is extended, the latch (3) engages with the locking element (40) to lock the position of the cabinet door (30).

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