Electromagnetic lock with limiting function, lock-camera industrial control all-in-one machine and selling cabinet

Abstract

The utility model relates to the technical field of intelligent retail cabinets, in particular to an electromagnetic lock with a limiting function, a lock camera industrial control all-in-one machine and a selling cabinet. Comprising an electromagnetic lock piece, the electromagnetic lock piece comprises a lock body and a lock plate, and a limiting electromagnet is arranged on one side of the lock body; the lock body comprises a lock cover, an electromagnet and a sensor plate are installed on the lock cover side by side, and a position detection sensor and a Hall sensor are installed on the sensor plate side by side. And a sensing device is mounted on the locking plate. According to the utility model, through the annular magnet, when the circular spring bolt rotates to any angle, the Hall sensor can accurately detect the rotation, and a stuck lock can be accurately identified; a two-section coil structure with a positioning hole is matched with a sliding rod with a groove and a spring bolt to be combined into a whole, telescopic limiting of a sliding rod assembly of an electromagnet is achieved in cooperation with the limiting electromagnet, the locking action of the spring bolt is completed, and the structure is simple; and the Hall sensor is used for directly detecting the position of the spring bolt, so that the space occupation of the detection device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent retail cabinets, and in particular to an electromagnetic lock with a limit function, a lock-camera industrial control all-in-one machine, and a vending cabinet. Background Art

[0002] Current smart retail lockers often rely on multiple devices, including smart locks, industrial computers, and cameras, to provide unmanned vending services. Electromagnetic locks, which lock and unlock by retracting and retracting a bolt driven by an electromagnet, are widely used in existing smart retail lockers.

[0003] Traditional smart locks require electromagnets to drive the lock tongue, which extends and locks through a series of mechanical connections and transformations. These locks are complex, bulky, and prone to failure. They also lack or only have the ability to detect a single state of the lock tongue. To address this, we propose an electromagnetic lock with a limit function, a lock-camera industrial control unit, and a vending machine. Utility Model Content

[0004] The purpose of the present utility model is to provide an electromagnetic lock with a limit function, a lock-camera industrial control integrated machine and a vending cabinet, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, one of the purposes of the present utility model is to provide an electromagnetic lock with a limit function, including an electromagnetic lock member, the electromagnetic lock member including a lock body and a lock plate arranged opposite to each other in upper and lower directions, and a limit electromagnet is provided on one side of the lock body;

[0006] The lock body includes a lock cover, on which an electromagnet and a sensor plate are mounted side by side by screws, and a position detection sensor and a Hall sensor are mounted side by side on the sensor plate;

[0007] The limit electromagnet is vertically mounted on the outer side wall of the mounting shell sleeved on the outer side of the electromagnet by screws;

[0008] The locking piece is provided with a sensing device corresponding to the position of the position detection sensor.

[0009] Furthermore, the electromagnet includes a two-section coil with a limiting hole at the central axis and a slide rod assembly slidably inserted into the limiting hole of the two-section coil; the slide rod assembly is inserted into the middle of the electromagnet and slides by electromagnetic force;

[0010] The slide bar assembly includes a grooved slide bar, a lock tongue fixedly inserted at the lower end of the grooved slide bar, and an annular magnet embedded and sleeved on the outer side of the upper end of the lock tongue; the outer diameters of the annular magnet and the lock tongue are both smaller than the outer diameter of the grooved slide bar, and the top end of the annular magnet contacts the bottom end of the grooved slide bar, so that the Hall sensor can stably receive its magnetic signal regardless of the angle to which the lock tongue is rotated;

[0011] A coil frame is fixed between the two sections of the two-section coil; the installation position of the limit electromagnet corresponds to the position of the coil frame;

[0012] A circular groove structure is provided at the center of the outer side wall of the grooved sliding rod.

[0013] Furthermore, a limiting rod with a movable end extending into the coil frame is slidably inserted into the limiting electromagnet, a positioning hole for accommodating the insertion of the limiting rod is opened in the center of the side wall of the coil frame, and a compression spring is fixedly sleeved on the outer side of one end of the limiting rod close to the limiting electromagnet;

[0014] The width of the groove structure of the grooved sliding rod is greater than or equal to the outer diameter of the limiting rod. When the grooved sliding rod slides up and down until the groove structure and the positioning hole are in the same horizontal plane, the end of the limiting rod can pass through the side wall of the mounting shell and the positioning hole of the coil skeleton in sequence and be inserted into the groove structure of the grooved sliding rod, thereby realizing the telescopic limitation of the sliding rod assembly in the electromagnet and completing the locking action of the lock tongue.

[0015] Furthermore, the Hall sensor is installed on a side close to the electromagnet. When the slide rod assembly is fully extended downward, the annular magnet corresponds to the position of the Hall sensor, ensuring that the Hall sensor can stably receive magnetic signals to control the operation of the lock tongue and the limit electromagnet.

[0016] Furthermore, the position detection sensor is installed on a side away from the electromagnet, and the position detection sensor is a Hall sensor or an RFID transmitting and receiving sensor; the position detection sensor is used to detect the opening and closing status of the cabinet door by detecting the corresponding position of the sensing device when the cabinet door of the retail cabinet is closed.

[0017] Furthermore, a through hole is coaxially opened on the lock cover corresponding to the limiting hole of the two-section coil, and a shaft sleeve is installed in the through hole. The inner diameter of the shaft sleeve is greater than or equal to the outer diameter of the annular magnet and smaller than the outer diameter of the bottom end of the grooved sliding rod.

[0018] Furthermore, a spring is provided in the limiting hole between the top inner end of the mounting shell outside the electromagnet and the top end of the slide bar assembly, and the outer diameter of the spring is smaller than the inner diameter of the limiting hole.

[0019] Furthermore, the four corners of the locking plate are provided with mounting holes for mounting on an external vending cabinet by screws, and the locking plate is provided with a lock hole corresponding to the slide rod assembly, and the inner hole size of the lock hole is greater than or equal to the end face size of the lock tongue.

[0020] The second object of the present invention is to provide a lock-camera industrial control all-in-one computer for realizing the switch lock control of the above-mentioned electromagnetic lock with a limit function, comprising a lock-camera industrial control all-in-one computer unit, the lock-camera industrial control all-in-one computer unit comprising a housing for mounting the electromagnetic lock element, the housing being fixed to the lock cover by screws and enclosing all components of the electromagnetic lock element except the lock cover and the lock plate, and the housing also regularly mounting a camera, a main control board, a battery and a speaker;

[0021] The lock cover is also provided with an opening for ensuring the field of view of the camera, and the camera is installed at the opening with its lens facing the lock hole;

[0022] The main control board is respectively connected to the electromagnet, the position detection sensor, the Hall sensor, the limit electromagnet, the induction device, the camera, the battery and the speaker through signal lines;

[0023] The battery is electrically connected to the two-segment coil, the position detection sensor, the Hall sensor, the limit electromagnet, the induction device, the camera, the main control board and the speaker through wires.

[0024] The third purpose of the present utility model is to provide a vending cabinet equipped with the above-mentioned lock and camera industrial control integrated machine, including a vending cabinet main body, the vending cabinet main body including a cabinet body, a cabinet door installed at the opening of the cabinet body, and the lock and camera industrial control integrated machine unit installed between the cabinet body and the movable end of the cabinet door.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In this electromagnetic lock, lock-camera industrial control computer, and vending machine with a limit function, the traditional lock tongue is simply a stainless steel cylinder. This solution adds a ring-shaped magnet, allowing the Hall effect sensor to accurately detect whether the circular lock tongue is fully extended at any angle, thereby identifying the lock and accurately controlling the limit position of the limit electromagnet.

[0027] 2. In the electromagnetic lock, lock camera industrial control integrated computer and vending cabinet with limit function, the traditional electromagnetic lock is mainly composed of electromagnet, slide bar, spring, movable link, roller, fixed shaft, roller bracket, lock tongue and shaft sleeve and other parts; the locking structure is complex, and its working principle is: the lock tongue is provided with special-shaped grooves and inclined surfaces, and the shaft sleeve is provided with a retaining edge; the slide bar of the electromagnet pushes the movable link under the action of the spring, and the movable link pushes the roller bracket, and the roller bracket equipped with the roller rotates around the fixed shaft When the lock tongue rotates, the roller presses against the special-shaped groove of the lock tongue to push the lock tongue up. When the line connecting the fixed shaft and the roller axis is perpendicular to the inclined surface of the lock tongue, the rib of the shaft sleeve blocks the roller and prevents it from rotating further. At this time, the dead point of the mechanical structure movement is generated and the lock tongue is locked. This solution uses an improved two-stage coil structure with positioning holes to design the grooved slide rod to be integrated with the lock tongue. The limit electromagnet is combined to realize the extension and extension limit of the slide rod assembly of the electromagnet to complete the locking action of the lock tongue. The structure is simple.

[0028] 3. In this electromagnetic lock with a limit function, lock-camera industrial control integrated computer, and vending cabinet, traditional electromagnetic locks use the lock tongue connecting rod to detect whether the optical sensor is blocked. This solution uses a Hall effect sensor to directly detect the lock tongue position, thereby reducing the space occupied by the detection device and achieving a smaller lock body volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional structural diagram of an exemplary vending cabinet body in the present invention;

[0030] Figure 2 This is a structural diagram of an exemplary vending cabinet body in the present invention in a closed door state;

[0031] Figure 3 This is a structural diagram of an exemplary vending cabinet body in the present invention in an open door state;

[0032] Figure 4 This is a three-dimensional structural diagram of the locking and camera industrial control all-in-one unit in the present utility model;

[0033] Figure 5 This is a three-dimensional structural diagram of the electromagnetic lock component in the utility model;

[0034] Figure 6 This is an exploded structural diagram of the electromagnetic lock component in the present utility model;

[0035] Figure 7 This is a cross-sectional structural diagram of the electromagnetic lock element in the locked state of the utility model;

[0036] Figure 8 For this utility model Figure 7 The enlarged structure diagram of position Ⅰ in the middle;

[0037] Figure 9For this utility model Figure 7 The enlarged structure diagram at the middle II;

[0038] Figure 10 This is a cross-sectional structural diagram of the electromagnetic lock element in the unlocked state of the utility model;

[0039] Figure 11 For this utility model Figure 10 The enlarged structure diagram of the center Ⅲ;

[0040] Figure 12 This is the overall structural diagram of the slide bar assembly in the present utility model;

[0041] Figure 13 This is a cross-sectional structural diagram of the slide bar assembly in the present utility model;

[0042] Figure 14 This is a three-dimensional structural diagram of the two-section coil in the utility model;

[0043] 1. Electromagnetic lock components; 11. Lock body; 111. Electromagnet; 1111. Two-stage coil; 11111. Coil skeleton; 1112. Slide bar assembly; 11121. Slide bar with groove; 11122. Ring magnet; 11123. Lock tongue; 112. Sensor plate; 1121. Position detection sensor; 1122. Hall effect sensor; 113. Lock cover; 114. Bushing; 115. Spring; 116. Screw; 12. Limiting electromagnet; 121. Limiting rod; 122. Compression spring; 13. Locking plate; 131. Inductive device;

[0044] 2. Lock and camera industrial control all-in-one unit; 21. Housing; 22. Camera; 23. Main control board; 24. Battery; 25. Speaker;

[0045] 3. Sales cabinet body; 31. Cabinet door; 32. Cabinet body. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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. Example

[0047] like Figure 1-Figure 3 As shown, this embodiment provides a vending cabinet equipped with a locking and photographing industrial control all-in-one unit 2, including a vending cabinet body 3, the vending cabinet body 3 including a cabinet body 32, a cabinet door 31 being installed at the opening of the cabinet body 32, and the locking and photographing industrial control all-in-one unit 2 being installed between the cabinet body 32 and the movable end of the cabinet door 31.

[0048] Specifically, the vending cabinet is a type of vending cabinet with a self-service vending function; the vending cabinet can be a vertical self-service vending cabinet, a horizontal self-service vending cabinet, a self-service refrigerated cabinet, a self-service frozen cabinet, a beverage self-service vending cabinet, a food self-service vending cabinet or a comprehensive self-service vending cabinet, etc.

[0049] Among them, as the preferred embodiment of the present invention, the vending cabinet body 3 is a vertical self-service vending cabinet; it can be understood that, Figure 1-Figure 3 Only some components of the vending cabinet body 3 are shown schematically. The actual shape, size, position and structure of these components are not affected by the actual shape, size, position and structure of the vending cabinet body 3. Figure 1-Figure 3 restrictions.

[0050] Furthermore, the cabinet door 31 is used to protect the internal space of the vending cabinet body 3 and provide users with a path for goods to enter and exit the vending cabinet body 3; the materials of the cabinet door 31 include but are not limited to glass, plastic and rubber, so that users can clearly see the goods in the cabinet and provide an enclosed space for the vending cabinet body 3.

[0051] Illustratively, the locking piece 13 used in conjunction with the electromagnetic lock element 1 is installed on a side wall of the cabinet door 31 away from the hinge end to ensure that the cabinet door 31 can be reliably locked in the closed state.

[0052] Furthermore, the cabinet 32 ​​is used to accommodate goods for sale and provide installation space for the lock-camera industrial control all-in-one unit 2.

[0053] like Figure 4 As shown, this embodiment provides a lock-camera industrial control all-in-one computer for realizing switch lock control of an electromagnetic lock with a limit function, including a lock-camera industrial control all-in-one computer unit 2. The lock-camera industrial control all-in-one computer unit 2 includes a shell 21 for installing the electromagnetic lock component 1. The shell 21 is fixed to the lock cover 113 by screws 116, and wraps all components of the electromagnetic lock component 1 except the lock cover 113 and the lock plate 13. A camera 22, a main control board 23, a battery 24 and a speaker 25 are also regularly installed in the shell 21; the lock-camera industrial control all-in-one computer unit 2 is used to realize various functions of the electromagnetic lock component 1 and the vending cabinet body 3, including opening and closing of the door lock, feedback on the cabinet door 31 and the door lock status, etc.

[0054] In this embodiment, the lock cover 113 is further provided with an opening for ensuring the field of view of the camera 22. The camera 22 is installed at the opening with its lens facing the lock hole position, and is used to take pictures to monitor the locked or unlocked state of the electromagnetic lock element 1;

[0055] The main control board 23 is connected to the electromagnet 111, the position detection sensor 1121, the Hall sensor 1122, the limit electromagnet 12, the induction device 131, the camera 22, the battery 24 and the speaker 25 through signal lines. The main control board 23 receives sensor signals, processes information and sends action instructions to the actuators;

[0056] The battery 24 is electrically connected to the two-segment coil 1111, the position detection sensor 1121, the Hall sensor 1122, the limit electromagnet 12, the induction device 131, the camera 22, the main control board 23 and the speaker 25 through wires, and the battery 24 provides power to the electrical components in the entire lock-camera industrial control integrated machine.

[0057] For example, the lock-camera industrial control all-in-one unit 2 is installed on one side of the cabinet 32 ​​and is connected to the background server through a network or other means to achieve real-time data transmission and remote management.

[0058] The electromagnetic lock 1 is used to intelligently lock and unlock the vending cabinet 3. The electromagnetic lock 1 receives instructions from the main control board 23 and continuously feeds back the cabinet door 31 and its own working status to the main control board 23, thereby achieving control over the vending cabinet 3.

[0059] In some embodiments, the lock-camera industrial control unit 2 is mounted on the left side of the vending cabinet body 3. For example, the electromagnetic lock 1 is mounted to the vending cabinet body 3 via screws 116. The lock body 11 is mounted above the cabinet body 32 near the cabinet door 31. The cabinet door 31 is equipped with a locking plate 13 that cooperates with the electromagnetic lock 1. The lock body 11, locking plate 13, and limit electromagnet 12 work together to ensure that the cabinet door 31 is securely locked when closed.

[0060] like Figure 5-Figure 14 As shown, this embodiment provides an electromagnetic lock with a limit function, including an electromagnetic lock element 1, the electromagnetic lock element 1 includes a lock body 11 and a lock plate 13 arranged opposite to each other in the upper and lower directions, and a limit electromagnet 12 is provided on one side of the lock body 11;

[0061] The lock body 11 includes a lock cover 113 , on which an electromagnet 111 and a sensor plate 112 are mounted side by side via screws 116 , and on the sensor plate 112 , a position detection sensor 1121 and a Hall sensor 1122 are mounted side by side;

[0062] The limit electromagnet 12 is vertically mounted on the outer wall of the mounting shell that is sleeved on the outer side of the electromagnet 111 by means of screws 116;

[0063] A sensing device 131 corresponding to the position of the position detection sensor 1121 is mounted on the locking piece 13 .

[0064] In this embodiment, the electromagnet 111 includes a two-section coil 1111 with a limiting hole at the central axis and a sliding rod assembly 1112 slidably inserted into the limiting hole of the two-section coil 1111; the sliding rod assembly 1112 is inserted in the middle of the electromagnet 111 and slides by electromagnetic force.

[0065] It is understandable that Figure 5 and Figure 6 Only some components of the electromagnetic lock 1 are shown schematically, and the actual shape, size, position and structure of these components are not affected by the present invention. Figure 5 and Figure 6 In some embodiments, the electromagnetic lock element 1 may also not include the sleeve 114 and the spring 115.

[0066] In some embodiments, see Figure 7-Figure 9 At this point, the cabinet door 31 is in the closed position. The position detection sensor 1121 can detect the signal from the inductive device 131 on the lock plate 13 in the closed position of the cabinet door. At this point, the spring 115 of the lock body 11 applies force downward, pushing the slide bar assembly 1112 downward to its limit position. The Hall sensor 1122 detects the annular magnet 11122 on the slide bar assembly 1112. The sensor board 112 issues a command to control the limit electromagnet 12. The compression spring 122 pushes the limit bar 121 to the left to its limit position, locking the grooved slide bar 11121 of the slide bar assembly 1112. This locks the lock tongue 11123, completing the closure of the vending cabinet body 3.

[0067] See also Figure 10-11 At this time, the cabinet door 31 is in the fully open position, and the sensor board 112 sends a command to control the limit rod 121 of the limit electromagnet 12 to retract to the right. The limit rod 121 is disengaged from the groove structure of the grooved slide bar 11121. The magnetic field generated by the power supply of the electromagnet 111 sucks the slide bar assembly 1112 back upward and maintains this state.

[0068] like Figure 12-13 As shown, the slide bar assembly 1112 includes a grooved slide bar 11121, a lock tongue 11123 fixedly inserted into the lower end of the grooved slide bar 11121, and an annular magnet 11122 embedded and sleeved on the outer side of the upper end of the lock tongue 11123; the outer diameters of the annular magnet 11122 and the lock tongue 11123 are both smaller than the outer diameter of the grooved slide bar 11121, and the top end of the annular magnet 11122 contacts the bottom end of the grooved slide bar 11121; so that no matter what angle the lock tongue 11123 is rotated to, the Hall sensor 1122 can stably receive its magnetic signal;

[0069] Among them, the material of the lock tongue 11123 is stainless steel, etc., the material of the annular magnet 11122 is neodymium iron boron, etc., and the material of the grooved sliding rod 11121 is carbon steel, etc., which are not specifically limited here.

[0070] Specifically, the annular magnet 11122, the lock tongue 11123 and the grooved slide rod 11121 can be formed into a whole through processes such as insert molding, gluing, and clamping.

[0071] It is understandable that Figure 12 and Figure 13 Only some of the components of the slide bar assembly 1112 are shown schematically, and the actual shape, size, position and configuration of these components are not affected by the present invention. Figure 12 and Figure 13 In some embodiments, the annular magnet 11122 in the slide bar assembly 1112 may also be fan-shaped or semicircular.

[0072] like Figure 14 As shown, a coil skeleton 11111 is fixed between the two sections of the two-section coil 1111, and the installation position of the limit electromagnet 12 corresponds to the position of the coil skeleton 11111; a limit rod 121 with a movable end that can extend into the coil skeleton 11111 is slidably inserted into the limit electromagnet 12, and a positioning hole for accommodating the insertion of the limit rod 121 is opened in the center of the side wall of the coil skeleton 11111, serving as a movement channel for the limit rod 121 of the limit electromagnet 12, and a compression spring 122 is fixedly sleeved on the outer side of one end of the limit rod 121 close to the limit electromagnet 12; the compression spring 122 is used to provide external force for the extension of the limit rod 121;

[0073] A circular groove structure is provided in the center of the outer wall of the grooved slide rod 11121. The width of the groove structure of the grooved slide rod 11121 is greater than or equal to the outer diameter of the limiting rod 121. When the grooved slide rod 11121 slides up and down until the groove structure and the positioning hole are in the same horizontal plane, the end of the limiting rod 121 can pass through the side wall of the mounting shell and the positioning hole of the coil skeleton 11111 in turn and be inserted into the groove structure of the grooved slide rod 11121, thereby realizing the telescopic limitation of the slide rod assembly 1112 in the electromagnet 111 and completing the locking action of the lock tongue 11123.

[0074] Furthermore, the Hall sensor 1122 is installed on a side close to the electromagnet 111. When the slide rod assembly 1112 is fully extended downward, the annular magnet 11122 corresponds to the position of the Hall sensor 1122, ensuring that the Hall sensor 1122 can stably receive the magnetic signal to control the operation of the lock tongue 11123 and the limit electromagnet 12.

[0075] Furthermore, the position detection sensor 1121 is installed on a side away from the electromagnet 111, and the position detection sensor 1121 is a Hall sensor or an RFID transmitting and receiving sensor; the position detection sensor 1121 is used to detect the opening and closing status of the cabinet door 31 by detecting the corresponding position of the sensing device 131 when the cabinet door 31 of the retail cabinet is closed.

[0076] Furthermore, a through hole is coaxially opened on the lock cover 113 at the limiting hole corresponding to the two-section coil 1111, and a shaft sleeve 114 is installed in the through hole. The inner diameter of the shaft sleeve 114 is greater than or equal to the outer diameter of the annular magnet 11122 and smaller than the outer diameter of the bottom end of the grooved slide bar 11121, so that when the slide bar assembly 1112 extends to the outermost end, the annular magnet 11122 slides into the shaft sleeve 114, and the shaft sleeve 114 is used to limit the further sliding of the grooved slide bar 11121 to prevent the slide bar assembly 1112 from slipping.

[0077] Furthermore, a spring 115 is provided in the limiting hole between the top of the mounting shell outside the electromagnet 111 and the top of the slide assembly 1112. The outer diameter of the spring 115 is smaller than the inner diameter of the limiting hole. The spring 115 is used to provide external force for the extension action of the slide assembly 1112.

[0078] In this embodiment, mounting holes for mounting on an external vending cabinet via screws 116 are provided at the four corners of the locking plate 13. A locking hole is provided at the corresponding slide assembly 1112 of the locking plate 13. The inner dimension of the locking hole is greater than or equal to the end face dimension of the lock tongue 11123, so that the lock tongue 11123 extends into the lock hole, thereby realizing the locking action of the electromagnetic lock component 1.

[0079] According to the above description, the improvements of the electromagnetic lock, lock-camera industrial control integrated machine and vending cabinet with a limiting function proposed in this embodiment are: the traditional electromagnetic lock telescopic and locking structure is improved; the lock tongue 11123 part of the electromagnet 111 is improved into a grooved slide rod 11121 and a combined limiting electromagnet 12 to achieve the locking of the lock tongue 11123; the structure is simple to implement and the volume is small.

[0080] The above shows and describes 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 above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic lock with a limit function, characterized by: The electromagnetic lock component (1) comprises a lock body (11) and a lock plate (13) arranged opposite to each other in the upper and lower parts, and a limiting electromagnet (12) is provided on one side of the lock body (11); The lock body (11) includes a lock cover (113), an electromagnet (111) and a sensor plate (112) are mounted side by side on the lock cover (113) via screws (116), and a position detection sensor (1121) and a Hall sensor (1122) are mounted side by side on the sensor plate (112); The electromagnet (111) comprises a two-section coil (1111) with a limiting hole at the central axis and a sliding rod assembly (1112) slidably inserted into the limiting hole of the two-section coil (1111); The slide bar assembly (1112) comprises a grooved slide bar (11121), a lock tongue (11123) fixedly plugged into the lower end of the grooved slide bar (11121), and an annular magnet (11122) embedded and sleeved on the outer side of the upper end of the lock tongue (11123); the outer diameters of the annular magnet (11122) and the lock tongue (11123) are both smaller than the outer diameter of the grooved slide bar (11121), and the top end of the annular magnet (11122) contacts the bottom end of the grooved slide bar (11121); The limiting electromagnet (12) is vertically mounted on the outer wall of the mounting shell sleeved on the outer side of the electromagnet (111) via screws (116); A sensing device (131) corresponding to the position of the position detection sensor (1121) is mounted on the locking piece (13).

2. The electromagnetic lock with a limit function according to claim 1, characterized in that: A coil frame (11111) is fixed between the two segments of the two-segment coil (1111); the installation position of the limiting electromagnet (12) corresponds to the position of the coil frame (11111); A circular groove structure is provided in the center of the outer wall of the grooved slide bar (11121).

3. The electromagnetic lock with a limit function according to claim 2, characterized in that: A limiting rod (121) is slidably inserted into the limiting electromagnet (12), the movable end of which can extend into the coil frame (11111), a positioning hole for accommodating the insertion of the limiting rod (121) is provided at the center of the side wall of the coil frame (11111), and a compression spring (122) is fixedly sleeved on the outer side of one end of the limiting rod (121) close to the limiting electromagnet (12); The width of the groove structure of the grooved slide bar (11121) is greater than or equal to the outer diameter of the limiting rod (121). When the grooved slide bar (11121) slides up and down until the groove structure and the positioning hole are in the same horizontal plane, the end of the limiting rod (121) can pass through the side wall of the mounting shell and the positioning hole of the coil skeleton (11111) in sequence and be inserted into the groove structure of the grooved slide bar (11121).

4. The electromagnetic lock with a limit function according to claim 3, characterized in that: The Hall sensor (1122) is installed on a side close to the electromagnet (111), and when the slide bar assembly (1112) is fully extended downward, the positions of the annular magnet (11122) and the Hall sensor (1122) correspond.

5. The electromagnetic lock with a limit function according to claim 4, characterized in that: The position detection sensor (1121) is installed on a side away from the electromagnet (111), and the position detection sensor (1121) is a Hall sensor or an RFID transmitting and receiving sensor.

6. The electromagnetic lock with a limit function according to claim 5, characterized in that: A through hole is coaxially provided on the lock cover (113) at the limiting hole corresponding to the two-section coil (1111), and a shaft sleeve (114) is installed in the through hole. The inner diameter of the shaft sleeve (114) is greater than or equal to the outer diameter of the annular magnet (11122) and smaller than the outer diameter of the bottom end of the grooved slide rod (11121).

7. The electromagnetic lock with a limit function according to claim 6, characterized in that: A spring (115) is provided in the limiting hole between the top end of the mounting shell outside the electromagnet (111) and the top end of the slide assembly (1112), and the outer diameter of the spring (115) is smaller than the inner diameter of the limiting hole.

8. The electromagnetic lock with a limit function according to claim 7, characterized in that: The locking plate (13) is provided with mounting holes at the four corners for mounting on an external vending cabinet via screws (116), and a locking hole is provided at the locking plate (13) corresponding to the slide assembly (1112), and the inner size of the locking hole is greater than or equal to the end face size of the locking tongue (11123).

9. A lock-camera industrial control all-in-one computer for realizing the on / off lock control of an electromagnetic lock with a limit function as claimed in any one of claims 1 to 8, comprising a lock-camera industrial control all-in-one computer unit (2), characterized in that: The lock-camera industrial control all-in-one unit (2) comprises a housing (21) for mounting the electromagnetic lock component (1); the housing (21) is fixed to the lock cover (113) by screws (116) and encloses all components of the electromagnetic lock component (1) except the lock cover (113) and the lock plate (13); a camera (22), a main control board (23), a battery (24) and a speaker (25) are also regularly mounted in the housing (21); The lock cover (113) is also provided with an opening for ensuring the field of view of the camera (22), and the camera (22) is installed at the opening with its lens facing the lock hole; The main control board (23) is respectively connected to the electromagnet (111), the position detection sensor (1121), the Hall sensor (1122), the limit electromagnet (12), the induction device (131), the camera (22), the battery (24) and the speaker (25) through signal lines; The battery (24) is electrically connected to the two-segment coil (1111), the position detection sensor (1121), the Hall sensor (1122), the limit electromagnet (12), the induction device (131), the camera (22), the main control board (23) and the speaker (25) through wires.

10. A vending cabinet equipped with the lock-camera industrial control integrated machine according to claim 9, comprising a vending cabinet body (3), characterized in that: The vending cabinet body (3) comprises a cabinet body (32), a cabinet door (31) is installed at the opening of the cabinet body (32), and the lock-camera industrial control all-in-one unit (2) is installed between the cabinet body (32) and the movable end of the cabinet door (31).

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