Electromagnetic lock and vending cabinet

Abstract

The present invention relates to the technical field of electromagnetic locks, and more specifically, to an electromagnetic lock and a vending cabinet, comprising a cabinet body, wherein the cabinet body is composed of a box body and a hollow door, wherein the box body is symmetrically provided with two electromagnetic lock assemblies up and down, wherein the electromagnetic lock assembly comprises a fixed plate, a lock tongue structure arranged on the fixed plate, and a lock core structure arranged at the rear end of the fixed plate, and a main electromagnet for controlling the upward and downward movement of the lock core structure is arranged above the lock core structure. The vending cabinet can achieve the locking of the hollow door and the box body by using an electromagnetic lock, and at the same time, the electromagnetic lock can still remain locked in the event of a power outage or circuit failure, thereby avoiding the situation where the hollow door is directly opened after the power is cut off and the magnetic force is lost, and the safety is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic locks, in particular to an electromagnetic lock and a vending cabinet. Background Art

[0002] The back of the vending cabinet is equipped with a door for inspecting the interior and filling goods, which is generally locked by a mechanical lock or an electromagnetic lock. Electromagnetic locks include electric bolt locks that lock through mechanical movement after power is turned on and magnetic locks that lock directly through the magnetic attraction of an electromagnet.

[0003] For example, the invention patent with the authorization announcement number CN117846422A discloses an electromagnetic lock structure and an electromagnetic lock system in the field of electromagnetic lock technology. The electromagnetic lock structure includes a mounting frame, a mobile frame, a first locking assembly, a second locking assembly and an electromagnet; the mobile frame is slidably arranged on the mounting frame, and a limiting column is arranged on the mobile frame; the first locking assembly includes a first locking plate, and the second locking assembly includes a second locking plate, the first locking plate is provided with a first locking groove and a second locking groove, and the second locking plate is provided with a third locking groove and a fourth locking groove; in the unlocked state, an opening is formed between the first locking groove and the third locking groove, and the first locking plate and the second locking plate are both in contact with the limiting column; in the locked state, a first limiting structure is formed between the first locking groove and the third locking groove, a second limiting structure is formed between the second locking groove and the fourth locking groove, and the limiting column is located in the second limiting structure.

[0004] Combining the above cases and actual situations, we found the following problems: when the electromagnetic lock is in use, it is powered directly by batteries or other power sources. When encountering situations such as low power, power outages or circuit failures, it cannot continue to be locked, which can easily lead to property loss. Summary of the invention

[0005] The object of the present invention is to provide an electromagnetic lock and a vending cabinet to solve the above-mentioned problems in the prior art.

[0006] To achieve the above object, the present invention provides an electromagnetic lock, including an electromagnetic lock assembly, characterized in that: the electromagnetic lock assembly includes a fixed plate, a lock tongue structure arranged on the fixed plate, and a lock core structure arranged at the rear end of the fixed plate, a main electromagnet for controlling the upward and downward movement of the lock core structure is arranged above the lock core structure, and a matching lock buckle is arranged on the lock tongue structure;

[0007] The lock tongue structure includes a lock plate and a plurality of tooth blocks fixed on the outer edge of the lock plate, the lock plate is provided with a first entrance for the lock buckle to enter, the fixed plate is provided with two first driven teeth symmetrically arranged front and back on the right side of the lock plate, the right side of the first driven teeth is provided with second driven teeth meshing with each other, and a driving tooth is provided between the second driven teeth;

[0008] The lock core structure includes a rotating seat and a lock core rod with a bottom end arranged in the rotating seat, the bottom surface of the rotating seat is coaxially fixed with the active tooth, the fixed plate is symmetrically fixed with sliding rods on the left and right sides of the rotating seat, the outer wall of the lock core rod is symmetrically fixed with limit rods near the top, the sliding rod passes through the corresponding limit rod and the two are slidably connected, a second spring is sleeved between the top of the sliding rod and the limit rod, the side wall of the bottom end of the lock core rod is symmetrically fixed with wing rods, and the inner wall of the rotating seat is symmetrically provided with card grooves adapted to the wing rods.

[0009] In the technical solution of the present invention, the fixing plate is composed of a mounting portion at the right end and a locking portion at the left end, and a second entrance is provided on the front side of the locking portion for facilitating the entry and exit of the lock buckle, the first entrance and the second entrance are both U-shaped and the centers of the circles at the bending points of the two are located on the same vertical line, the opening widths of the first entrance and the second entrance are greater than the diameter of the lock buckle, a rotating groove is provided on the top surface of the locking portion, and a limiting ring is fixed on the bottom surface of the lock plate, and the limiting ring is provided with a notch corresponding to the first entrance.

[0010] In the technical solution of the present invention, a plurality of the tooth blocks are meshed with the first driven teeth, and a distance between the centers of two of the first driven teeth is greater than an opening width of the first inlet.

[0011] In the technical solution of the present invention, the lower half of the slot is a spiral slot with a spiral turn of one quarter, the spiral direction of the slot is counterclockwise from bottom to top, and the upper half of the slot is a vertical slot.

[0012] In the technical solution of the present invention, a safety mechanism is symmetrically arranged on the front and back of the lock core rod wall, and the safety mechanism includes an auxiliary electromagnet, a fixed rod fixed at the top and the middle of the bottom surface of the auxiliary electromagnet, and a permanent magnet sleeved outside the fixed rod. The auxiliary electromagnet and the lock core rod wall are fixedly connected by setting a connecting rod.

[0013] In the technical solution of the present invention, the permanent magnet is cylindrical and is adsorbed on the bottom surface of the auxiliary electromagnet when energized, the bottom end of the fixed rod is arranged in the permanent magnet and the two are slidably connected, and a third spring is arranged between the bottom surface of the fixed rod and the inner bottom surface of the permanent magnet.

[0014] In the technical solution of the present invention, the top magnetic pole of the auxiliary electromagnet and the bottom magnetic pole of the main electromagnet attract each other and the attractive force is greater than the elastic force of the second spring, and the elastic force between the auxiliary electromagnet and the permanent magnet is greater than the elastic force of the third spring.

[0015] In the technical solution of the present invention, a latching hole is provided on the second driven tooth, and the position of the latching hole corresponds to the permanent magnet when locking, and the distance between the bottom surface of the permanent magnet and the top surface of the second driven tooth is equal to the distance between the bottom end of the lock core rod and the bottom end of the latching groove.

[0016] In the technical solution of the present invention, an abutment mechanism is provided at the bend of the second inlet, and the abutment mechanism includes a pad adapted to the curvature of the second inlet and an insertion rod fixed to the middle part of the rear side wall of the pad, the insertion rod is inserted into the second inlet, and a first spring is provided between the rear end of the insertion rod and the second inlet.

[0017] In addition, the present invention also provides a vending cabinet, including a cabinet body, which is composed of a box body and a hollow door, and the box body is symmetrically provided with two electromagnetic lock assemblies up and down, the lock buckle is fixed on the right edge of the hollow door and the position number corresponds to the electromagnetic lock assembly, and the box body is provided with an installation groove adapted to the position of the electromagnetic lock assembly, the main electromagnet is fixed on the top surface of the installation groove, the installation part is fixed on the bottom surface of the installation groove, and the lock mouth part extends out of the left side wall of the installation groove.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, the electromagnetic lock is provided with a lock tongue structure and a lock core structure. When locking, the main electromagnet is connected through the induction device, the main electromagnet and the auxiliary electromagnet attract each other to drive the lock core rod to move upward and compress the second spring, and the lock core rod drives the rotating seat to rotate clockwise when passing through the spiral groove, and drives the lock plate to rotate counterclockwise through the transmission of the active tooth, the first driven tooth, the second driven tooth and the tooth block. At this time, the first inlet and the second inlet are cross-arranged at 90 degrees to lock the lock buckle 3, and the operation is simple and convenient.

[0020] 2. In the present invention, by setting a safety mechanism, when the main electromagnet and the auxiliary electromagnet cannot be energized and lose magnetic force due to power outage or line failure, the third spring will push the permanent magnet to move downward. Since the permanent magnet falls faster, when the permanent magnet reaches the card hole, the wing rod is still in the vertical groove above. At this time, the permanent magnet restricts the rotation of the second driven tooth, thereby preventing the entire lock tongue structure from moving, and then continues to lock, avoiding the situation where the hollow door is directly opened due to power failure and causing property loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a partial cross-sectional view of the vending cabinet of the present invention;

[0023] Figure 3 This is a schematic diagram of the locked state of the electromagnetic lock in the present invention;

[0024] Figure 4 This is a schematic diagram of the unlocking state of the electromagnetic lock in the present invention;

[0025] Figure 5 It is an exploded view of the lock tongue structure in the present invention;

[0026] Figure 6 An exploded view of the lock core structure in the present invention;

[0027] Figure 7 It is a schematic diagram of the lock core rod in the present invention;

[0028] Figure 8 It is a cross-sectional view of the rotating seat in the present invention;

[0029] Fig. 9 It is a cross-sectional view of the insurance mechanism in the present invention;

[0030] Fig.10 It is a cross-sectional view of the lock portion of the present invention;

[0031] Description of reference numerals:

[0032] 1. Cabinet body; 11. Box body; 12. Hollow door; 13. Installation slot;

[0033] 2. Electromagnetic lock assembly; 21. Fixing plate; 211. Mounting portion; 212. Locking portion; 213. Rotating groove; 214. First inlet; 215. Abutting mechanism; 2151. Backing plate; 2152. Inserting rod; 2153. First spring; 22. Lock tongue structure; 221. Locking plate; 2211. Tooth block; 2212. Second inlet; 2213. Limiting ring; 222. First driven tooth; 223. Second driven tooth; 2231, card hole; 224, active tooth; 23, lock core structure; 231, rotating seat; 2311, card slot; 232, lock core rod; 2321, limit rod; 2322, connecting rod; 2323, wing rod; 233, slide rod; 234, second spring; 235, safety mechanism; 2351, auxiliary electromagnet; 2352, permanent magnet; 2353, fixed rod; 2354, third spring; 24, main electromagnet;

[0034] 3. Lock. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0036] Unless explicitly stated otherwise, throughout the specification, the term “comprise” or variations thereof such as “include” or “comprising” will be understood as including the stated elements or components but not excluding other elements or components.

[0037] Reference Figure 1-Figure 10 As shown, this embodiment provides a technical solution:

[0038] An electromagnetic lock and a vending cabinet, comprising a cabinet body 1, the cabinet body 1 is composed of a box body 11 and a hollow door 12, the box body 11 is provided with two electromagnetic lock assemblies 2 symmetrically up and down, and the box body 11 is provided with a mounting groove 13 adapted to the position of the electromagnetic lock assembly 2;

[0039] The box body 11 and the hollow door 12 are locked by an electromagnetic lock assembly 2 symmetrically arranged up and down. The hollow door 12 is provided with a lock buckle 3 adapted to the electromagnetic lock assembly 2. The lock buckle 3 is vertically concave, and the horizontal section is fixed to the edge of the hollow door 12, and the vertical section is adapted to the lock tongue structure 22. The electromagnetic lock assembly 2 includes a fixed plate 21, a lock tongue structure 22 arranged on the fixed plate 21, and a lock core structure 23 arranged on the fixed plate 21 at the rear end. A main electromagnet 24 for controlling the lock core structure 23 to move up and down is provided above the lock core structure 23. When locked normally, the main electromagnet 24 and the auxiliary electromagnet 2351 are both in an energized state. At this time, the two attract each other and drive the lock core structure 23 to move up, and then drive the lock tongue structure 22 to buckle the lock buckle 3 to lock the box body 11 and the hollow door 12;

[0040] The lock core structure 23 includes a rotating seat 231 and a lock core rod 232 with a bottom end disposed in the rotating seat 231. The bottom surface of the rotating seat 231 is coaxially fixed with the active tooth 224. Slide rods 233 are symmetrically fixed on the left and right sides of the rotating seat 231 on the fixed plate 21. Limiting rods 2321 are symmetrically fixed on the outer side wall of the lock core rod 232 near the top. The sliding rod 233 passes through the corresponding limiting rod 2321 and the two are slidably connected. The sliding rod 233 prevents the lock core rod 232 from rotating, which makes it impossible to drive the rotating seat 231. The second spring 234 is sleeved between the top of the slide bar 233 and the limit rod 2321, and the wing rod 2323 is fixed symmetrically on the side wall of the bottom end of the lock core rod 232. The inner wall of the rotating seat 231 is symmetrically provided with a slot 2311 adapted to the wing rod 2323. When the main electromagnet 24 and the auxiliary electromagnet 2351 attract each other, the lock core rod 232 will be moved upward and compress the second spring 234. At the same time, the wing rod 2323 will drive the rotating seat 231 to rotate clockwise under the restriction of the slot 2311.

[0041] The lock tongue structure 22 includes a lock plate 221 and a plurality of tooth blocks 2211 fixed to the outer edge of the lock plate 221. The lock plate 221 is provided with a first entrance 214 for the lock buckle 3 to enter. The fixed plate 21 is provided with two first driven teeth 222 symmetrically arranged front and back on the right side of the lock plate 221. The right side of the first driven teeth 222 is provided with second driven teeth 223 meshing with each other. A driving tooth 224 is provided between the second driven teeth 223. The rotating shafts of the first driven teeth 222, the second driven teeth 223 and the driving teeth 224 are all embedded in the fixed plate 21 and can only rotate. When the rotating seat 231 rotates clockwise, the lock plate 221 will be driven to rotate counterclockwise through the transmission of the driving teeth 224, the first driven teeth 222, the second driven teeth 223 and the tooth block 2211.

[0042] In addition, if Figure 1-Figure 5 As shown, a mounting groove 13 is provided in the box body 11 at a position corresponding to the position of the electromagnetic lock assembly 2, and the fixing plate 21 is composed of a mounting portion 211 at the right end and a locking portion 212 at the left end. The main electromagnet 24 is fixed to the top surface of the mounting groove 13, and the mounting portion 211 is fixed to the bottom surface of the mounting groove 13. The locking portion 212 passes through the left groove wall of the mounting groove 13, and the locking portion 212 is arranged outside the box body 11, so that the lock buckle 3 can enter the locking portion 212 conveniently when closing the door.

[0043] Specifically, a second entrance 2212 is provided on the front side of the lock portion 212 for convenient entry and exit of the lock buckle 3. The first entrance 214 and the second entrance 2212 are both U-shaped, and the centers of the circles at the bending parts of the two are located on the same vertical line. When the door is not locked, the openings of the first entrance 214 and the second entrance 2212 are both facing forward. When the door is closed, the lock buckle 3 can directly enter the first entrance 214 and the second entrance 2212 through the openings. The opening widths of the first entrance 214 and the second entrance 2212 are larger than the diameter of the lock buckle 3. Since the hollow door 12 rotates when the door is closed, the larger opening can prevent the lock buckle 3 from moving with the hollow door 12. When the core door 12 rotates, it collides with the first inlet 214 and the second inlet 2212. A rotation groove 213 is provided on the top surface of the lock portion 212, and a limiting ring 2213 is fixed on the bottom surface of the lock plate 221. By setting the limiting ring 2213 and the rotation groove 213, the lock plate 221 can be limited without affecting the rotation of the lock plate 221. The limiting ring 2213 is provided with a notch corresponding to the first inlet 214, and the notch corresponds to the position of the second inlet 2212 to prevent the limiting ring 2213 from blocking the lock buckle 3 from entering. When locked, the first inlet 214 and the second inlet 2212 are cross-arranged at 90 degrees. Figure 3 , the vertical section of the lock buckle 3 is located in the middle.

[0044] Furthermore, a plurality of tooth blocks 2211 are meshed with the first driven teeth 222. When the first driven teeth 222 rotate, the lock plate 221 can be driven to rotate by the tooth blocks 2211. The distance between the centers of the two first driven teeth 222 is greater than the opening width of the first inlet 214, so as to avoid the situation that the first inlet 214 is too wide and the two first driven teeth 222 cannot contact the tooth blocks 2211, thereby causing the entire electromagnetic lock assembly 2 to be unable to be opened.

[0045] In addition, if Figure 6-Figure 9 As shown, the lower half of the slot 2311 is a spiral groove and the number of spiral turns is a quarter of a turn. The spiral direction of the slot 2311 is counterclockwise from bottom to top, and the upper half of the slot 2311 is a vertical slot. When locking, the lock core rod 232 moves upward, and the wing rod 2323 passes through the spiral groove first and then the vertical groove. When passing through the spiral groove, it will drive the rotating seat 231 to rotate clockwise, thereby achieving locking.

[0046] Furthermore, a safety mechanism 235 is symmetrically arranged on the front and rear sides of the rod wall of the lock core rod 232. The safety mechanism 235 includes a secondary electromagnet 2351, a fixing rod 2353 fixed at the top and the middle of the bottom surface of the secondary electromagnet 2351, and a permanent magnet 2352 sleeved outside the fixing rod 2353. The secondary electromagnet 2351 is fixedly connected to the rod wall of the lock core rod 232 by setting a connecting rod 2322. In the normal locking state, the main electromagnet 24 and the secondary electromagnet 2351 are both energized, so that the lock core rod 232 is always in the upper position. And compress the second spring 234. When the door needs to be opened, the main electromagnet 24 will be powered off and lose its magnetic force. At this time, under the action of the restoring force of the second spring 234, the lock core rod 232 will be pressed down. When the wing rod 2323 moves to the spiral groove, it will drive the rotating seat 231 to rotate counterclockwise. Finally, the driving tooth 224, the first driven tooth 222, the second driven tooth 223 and the tooth block 2211 drive the lock plate 221 to rotate clockwise, so that the first entrance 214 and the second entrance 2212 are parallel and opened.

[0047] Specifically, the permanent magnet 2352 is cylindrical and is adsorbed on the bottom surface of the auxiliary electromagnet 2351 when energized. The bottom end of the fixed rod 2353 is arranged in the permanent magnet 2352 and the two are slidably connected. A third spring 2354 is arranged between the bottom surface of the fixed rod 2353 and the inner bottom surface of the permanent magnet 2352. When a power outage or line failure causes the main electromagnet 24 and the auxiliary electromagnet 2351 to be unable to be energized and thus lose magnetic force, the permanent magnet 2352 loses the attraction of the auxiliary electromagnet 2351, and the third spring 2354 will push the permanent magnet 2352 to move downward. It should be noted that the second spring 234 will simultaneously push the lock core rod 232 downward, and the permanent magnet 2352 is also affected by the third spring 2354, so its falling speed will be greater than the falling speed of the lock core rod 232.

[0048] Furthermore, a latch hole 2231 is provided on the second driven tooth 223, and the position of the latch hole 2231 corresponds to the permanent magnet 2352 when locked. When the permanent magnet 2352 falls into the latch hole 2231, the second driven tooth 223 will be restricted so that it cannot rotate. At this time, the second spring 234 cannot push the wing rod 2323 into the spiral groove, thereby ensuring that the entire electromagnetic lock assembly 2 is still in a locked state, avoiding property losses caused by power outages or line failures. The distance between the bottom surface of the permanent magnet 2352 and the top surface of the second driven tooth 223 is equal to the distance between the bottom end of the lock core rod 232 and the bottom end of the latch groove 2311, avoiding the permanent magnet 2352 entering the latch hole 2231 during normal use, thereby causing the entire electromagnetic lock assembly 2 to be unable to be used normally.

[0049] It should be noted that the top magnetic pole of the auxiliary electromagnet 2351 and the bottom magnetic pole of the main electromagnet 24 attract each other and the attractive force is greater than the elastic force of the second spring 234, so as to avoid the lock core rod 232 being unable to be attracted upward during normal use, and the elastic force between the auxiliary electromagnet 2351 and the permanent magnet 2352 is greater than the elastic force of the third spring 2354, so as to avoid the permanent magnet 2352 and the auxiliary electromagnet 2351 being unable to form a whole during normal use. In addition, when both the main electromagnet 24 and the auxiliary electromagnet 2351 cannot be energized, since the permanent magnet 2352 falls faster, when the permanent magnet 2352 reaches the locking hole 2231, the wing rod 2323 is still in the vertical groove above, so as to avoid the wing rod 2323 having entered the spiral groove and driving the rotating seat 231 to rotate, causing the permanent magnet 2352 to be unable to enter the locking hole 2231, so that the hollow door 12 can be directly opened.

[0050] In addition, if Fig.10 As shown, an abutment mechanism 215 is provided at the bend of the second entrance 2212, and the abutment mechanism 215 includes a pad 2151 adapted to the curvature of the second entrance 2212 and an insertion rod 2152 fixed at the middle of the rear side wall of the pad 2151, the insertion rod 2152 is inserted into the second entrance 2212, and a first spring 2153 is provided between the rear end of the insertion rod 2152 and the second entrance 2212. When the vertical section of the lock buckle 3 enters the second entrance 2212, it presses the pad 2151 inwardly, and a sensing device is provided between the pad 2151 and the second entrance 2212. When the pad 2151 is squeezed and moves inwardly, the main electromagnet 24 is turned on to complete the locking. Controlling the circuit by the sensing device is an existing mature technology and will not be elaborated here.

[0051] The working principle of the electromagnetic lock and the vending cabinet of the present invention is specifically as follows:

[0052] When the hollow door 12 is closed, the vertical section of the lock catch 3 enters the second inlet 2212 and presses the pad 2151 inward, and the main electromagnet 24 is connected through the induction device. At this time, the main electromagnet 24 and the auxiliary electromagnet 2351 attract each other and drive the lock core rod 232 to move upward and compress the second spring 234. When the lock core rod 232 passes through the spiral groove, it drives the rotating seat 231 to rotate clockwise, and drives the lock plate 221 to rotate counterclockwise through the transmission of the active tooth 224, the first driven tooth 222, the second driven tooth 223 and the tooth block 2211. At this time, the first inlet 214 and the second inlet 2212 are cross-arranged at 90 degrees to lock the lock catch 3;

[0053] When the hollow door 12 needs to be opened, the main electromagnet 24 is powered off and loses its magnetic force. At this time, under the action of the restoring force of the second spring 234, the lock core rod 232 will be pressed down. When the wing rod 2323 moves to the spiral groove, it will drive the rotating seat 231 to rotate counterclockwise, and finally drive the lock plate 221 to rotate clockwise. At this time, the first inlet 214 and the second inlet 2212 are arranged in parallel, and can be contact locked;

[0054] When a power outage or line failure causes the main electromagnet 24 and the auxiliary electromagnet 2351 to be unable to be energized and thus lose magnetic force, the permanent magnet 2352 loses the attraction of the auxiliary electromagnet 2351, and the third spring 2354 will push the permanent magnet 2352 to move downward. It should be noted that the second spring 234 will also push the lock core rod 232 downward, and the permanent magnet 2352 is also affected by the third spring 2354, and the falling speed will be greater than the falling speed of the lock core rod 232. Since the permanent magnet 2352 falls faster, when the permanent magnet 2352 is in the card hole 2231, the wing rod 2323 is still in the vertical groove above. At this time, the permanent magnet 2352 restricts the rotation of the second driven tooth 223, thereby preventing the entire lock tongue structure 22 from moving, and then continues to lock, thereby avoiding the hollow door 12 from being directly opened due to power failure.

[0055] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. An electromagnetic lock, comprising an electromagnetic lock assembly (2), characterized in that: The electromagnetic lock assembly (2) comprises a fixed plate (21), a lock tongue structure (22) arranged on the fixed plate (21), and a lock core structure (23) arranged on the fixed plate (21) at the rear end, a main electromagnet (24) for controlling the upward and downward movement of the lock core structure (23) being arranged above the lock core structure (23), and a matching lock buckle (3) being arranged on the lock tongue structure (22); The lock tongue structure (22) comprises a lock plate (221) and a plurality of tooth blocks (2211) fixed to the outer edge of the lock plate (221); the lock plate (221) is provided with a first entrance (214) for the lock buckle (3) to enter; the fixed plate (21) is provided with two first driven teeth (222) symmetrically arranged front and back on the right side of the lock plate (221); second driven teeth (223) meshing with each other are provided on the right side of the first driven teeth (222); and driving teeth (224) are provided between the second driven teeth (223); The lock core structure (23) comprises a rotating seat (231) and a lock core rod (232) whose bottom end is arranged in the rotating seat (231); the bottom surface of the rotating seat (231) is coaxially fixed with the active tooth (224); sliding rods (233) are symmetrically fixed on the fixed plate (21) on the left and right sides of the rotating seat (231); a limit rod (2321) is symmetrically fixed on the outer wall of the lock core rod (232) near the top; the sliding rod (233) passes through the corresponding limit rod (2321) and the two are slidably connected; a second spring (234) is sleeved between the top of the sliding rod (233) and the limit rod (2321); a wing rod (2323) is symmetrically fixed on the side wall of the bottom end of the lock core rod (232); and a card slot (2311) adapted to the wing rod (2323) is symmetrically provided on the inner wall of the rotating seat (231).

2. The electromagnetic lock according to claim 1, characterized in that: The fixing plate (21) is composed of a mounting portion (211) at the right end and a locking portion (212) at the left end; a second inlet (2212) is provided on the front side of the locking portion (212) for facilitating the entry and exit of the lock buckle (3); the first inlet (214) and the second inlet (2212) are both U-shaped and the centers of the circles at the bending points of the two are located on the same vertical line; the opening widths of the first inlet (214) and the second inlet (2212) are greater than the diameter of the lock buckle (3); a rotation groove (213) is provided on the top surface of the locking portion (212); a limiting ring (2213) is fixed on the bottom surface of the locking plate (221); and the limiting ring (2213) is provided with a notch corresponding to the first inlet (214).

3. The electromagnetic lock according to claim 2, characterized in that: A plurality of the tooth blocks (2211) mesh with the first driven teeth (222), and the distance between the centers of two of the first driven teeth (222) is greater than the opening width of the first inlet (214).

4. The electromagnetic lock according to claim 3, characterized in that: The lower half of the slot (2311) is a spiral slot with a spiral turn of one quarter of a turn. The spiral direction of the slot (2311) is counterclockwise from bottom to top. The upper half of the slot (2311) is a vertical slot.

5. The electromagnetic lock according to claim 4, characterized in that: The lock core rod (232) has a safety mechanism (235) symmetrically arranged on the front and rear sides of the rod wall. The safety mechanism (235) comprises an auxiliary electromagnet (2351), a fixing rod (2353) fixed at the top and the middle of the bottom surface of the auxiliary electromagnet (2351), and a permanent magnet (2352) sleeved outside the fixing rod (2353). The auxiliary electromagnet (2351) and the lock core rod (232) are fixedly connected by a connecting rod (2322).

6. The electromagnetic lock according to claim 5, characterized in that: The permanent magnet (2352) is cylindrical and is adsorbed on the bottom surface of the auxiliary electromagnet (2351) when energized. The bottom end of the fixing rod (2353) is arranged in the permanent magnet (2352) and the two are slidably connected. A third spring (2354) is arranged between the bottom surface of the fixing rod (2353) and the inner bottom surface of the permanent magnet (2352).

7. The electromagnetic lock according to claim 6, characterized in that: The top magnetic pole of the secondary electromagnet (2351) and the bottom magnetic pole of the main electromagnet (24) attract each other and the attractive force is greater than the elastic force of the second spring (234), and the elastic force between the secondary electromagnet (2351) and the permanent magnet (2352) is greater than the elastic force of the third spring (2354).

8. The electromagnetic lock according to claim 7, characterized in that: The second driven tooth (223) is provided with a latching hole (2231), the position of the latching hole (2231) corresponding to the permanent magnet (2352) when locked, and the distance between the bottom surface of the permanent magnet (2352) and the top surface of the second driven tooth (223) is equal to the distance between the bottom end of the lock core rod (232) and the bottom end of the latching groove (2311).

9. The electromagnetic lock according to claim 8, characterized in that: An abutment mechanism (215) is provided at the bending portion of the second inlet (2212), the abutment mechanism (215) comprising a pad (2151) adapted to the curvature of the second inlet (2212) and an insertion rod (2152) fixed to the middle of the rear side wall of the pad (2151), the insertion rod (2152) being inserted into the second inlet (2212), and a first spring (2153) being provided between the rear end of the insertion rod (2152) and the second inlet (2212).

10. A vending cabinet, equipped with the electromagnetic lock according to claim 9, comprising a cabinet body (1), characterized in that: The cabinet body (1) is composed of a box body (11) and a hollow door (12); the box body (11) is symmetrically provided with two electromagnetic lock assemblies (2) at the top and bottom; the lock buckle (3) is fixed to the right edge of the hollow door (12) and the position and number of the lock buckles (3) correspond to the electromagnetic lock assemblies (2); the box body (11) is provided with a mounting groove (13) matched with the position of the electromagnetic lock assembly (2); the main electromagnet (24) is fixed on the inner top surface of the mounting groove (13); the mounting portion (211) is fixed on the inner bottom surface of the mounting groove (13); and the lock opening portion (212) extends out of the left side wall of the mounting groove (13).

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