A theft-proof device and method for a delivery port of an unmanned cabinet

Abstract

This invention relates to the field of junction boxes, specifically to an anti-theft device and method for the retrieval port of an unmanned vending machine. The device includes a retrieval port with an inner rotating shaft rotatably connected inside. A retrieval push plate is fixedly installed outside the inner rotating shaft. An outer anti-pull plate is detachably connected to the outer side of the retrieval port via fixing bolts. First arc-shaped grooves and second arc-shaped grooves are formed on both outer sides of the retrieval port. This invention uses a telescopic cylinder to slide the inner anti-theft push plate down before retrieval, causing it to engage with the anti-theft insert of the retrieval push plate. This not only strengthens the anti-theft capability of the retrieval port before retrieval, but also increases the resistance of the retrieval push plate by the fit between the anti-theft insert and the inner anti-theft push plate, reducing damage to the interior of the unmanned vending machine caused by forceful retrieval from the outer port when no goods are retrieved.

Description

Technical Field

[0001] This invention relates to the field of unmanned vending machines, and specifically to an anti-theft device and method for the pickup slot of an unmanned vending machine. Background Technology

[0002] Unmanned vending machines, also known as self-service vending cabinets or automatic vending machines, are 24-hour self-service intelligent retail devices that do not require human supervision. Users can select and pay for goods by scanning codes, facial recognition, or entering passwords. They are suitable for various scenarios such as office buildings, shopping malls, hospitals, schools, and scenic spots. Their core lies in achieving automated operation through technologies such as the Internet of Things and artificial intelligence, reducing labor costs and improving service efficiency. The anti-theft device at the vending machine's pickup port ensures the safety of goods through the integration of multiple technologies, with the core function of preventing unauthorized access and theft.

[0003] Patent application CN109637011B discloses a highly reliable unmanned vending machine with anti-theft functionality. The device includes a main body, a shelf, and a display glass. The display glass is mounted on the main body, and the shelf is located on the inner wall of the main body on the side furthest from the display glass. The shelf is equipped with a power unit. The main body contains a control system, and a retrieval port is located on the side of the main body closest to the display glass, below the glass. The main body also includes an auxiliary mechanism and a security mechanism. The auxiliary mechanism includes a tray and two drive components, while the security mechanism includes a rotating shaft, a protective plate, a locking plate, a support plate, two reset components, and two control components. This highly reliable unmanned vending machine with anti-theft functionality achieves the function of transporting goods through the auxiliary mechanism, preventing goods from falling directly and causing damage, thus improving reliability. Furthermore, the security mechanism enhances safety.

[0004] The existing anti-theft devices at the pickup slots of unmanned vending machines rely solely on a single layer of anti-theft measures before pickup and a single layer of enclosed pickup space after pickup. This makes the pickup slots vulnerable to forced entry and destruction. Furthermore, the current designs mostly use electronic controls, which are easily tampered with by external means. Over time, this leads to an over-reliance on electronic means for anti-theft, and the single anti-theft method increases the probability of the vending machine being stolen through the pickup slot.

[0005] Therefore, it is necessary to invent an anti-theft device and method for the pickup slot of an unmanned locker to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide an anti-theft device and method for the pickup slot of an unmanned vending machine. By combining dual anti-theft measures when no one is picking up the goods and dual sealing measures when picking up the goods, the anti-theft device not only strengthens the sealing of the pickup slot but also reduces the possibility of unauthorized theft by increasing resistance. The enhanced anti-theft measures when no goods are picked up and the dual sealing measures when picking up the goods also make this anti-theft device applicable to scenarios such as office buildings, shopping malls, and scenic spots. This addresses the problem that existing anti-theft devices for unmanned vending machines rely solely on a single layer of anti-theft measures before picking up the goods and a single layer of sealing the pickup space after picking up the goods. This makes the pickup slot vulnerable to forced entry and damage. Furthermore, existing designs often use electronic control, which is easily tampered with by external means. Over-reliance on electronic anti-theft methods in the long run increases the probability of the vending machine being stolen through the pickup slot.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an anti-theft device for the pickup port of an unmanned cabinet, comprising a pickup port, an inner rotating shaft rotatably connected inside the pickup port, a pickup push plate fixedly installed outside the inner rotating shaft, an outer anti-pull plate detachably connected to the outer side of the pickup port by fixing bolts, a first arc-shaped groove on both outer sides of the pickup port, and a second arc-shaped groove on both outer sides of the pickup port.

[0008] The anti-theft inserts located on both sides of the outer side of the picking push plate include a first linkage shaft, which is located inside the first arc-shaped groove. A linkage push rod is rotatably connected to the outside of the first linkage shaft, and a second linkage shaft is rotatably connected to the other end of the linkage push rod.

[0009] The fixed rotating shaft inside the rack retrieval port includes a rear stacked push plate. An arc-shaped push frame is fixedly installed on the outside of the fixed rotating shaft. A telescopic cylinder is fixedly installed above the inside of the rack retrieval port. An inner anti-theft push plate is fixedly installed at the bottom output end of the telescopic cylinder. Limiting grooves are opened on both sides inside the rack retrieval port. Limiting sliders are slidably connected inside the limiting grooves. Push racks are fixedly installed on both sides outside the inner anti-theft push plate.

[0010] Preferably, the linkage push rod is located inside the first arc-shaped groove, and the second linkage rotating shaft is located inside the second arc-shaped groove.

[0011] Preferably, the end of the second linkage shaft is fixedly connected to the outside of the rear stacked push plate, and the outside of the second linkage shaft is rotatably connected to the arc-shaped push frame.

[0012] Preferably, the inner anti-theft push plate is slidably connected to the cabinet's loading port, and the limiting slider is slidably connected to the inner anti-theft push plate.

[0013] Preferably, magnetic blocks are fixedly installed on the outer surface of the picking push plate, and an inner magnetic groove is opened at the bottom of the rear stacking push plate.

[0014] Preferably, the magnetic block fixedly installed on the outside of the picking push plate is magnetically connected to the inner magnetic groove opened at the bottom of the rear stacked push plate, and the inner anti-theft push plate is used in conjunction with the anti-theft plug.

[0015] Preferably, an inner anti-theft frame is fixedly installed on both sides above the loading port of the cabinet, and a first rotating rod is rotatably connected inside the inner anti-theft frame, with a first gear fixedly installed at the front end of the first rotating rod.

[0016] Preferably, a second gear is fixedly installed at the rear end of the first rotating rod, a linkage gear is externally meshed with the second gear, and a linkage anti-theft rod is fixedly installed externally on the linkage gear.

[0017] Preferably, an inner limit push plate is fixedly installed on the outside of the linkage anti-theft rod, and the inner limit push plate is rotatably connected to the inner anti-theft frame.

[0018] A method for preventing theft at the dispensing slot of an unmanned vending machine includes the anti-theft device for the dispensing slot of the unmanned vending machine as described above, and the specific processing steps are as follows:

[0019] Step 1: Before anyone picks up the goods, the pick-up pusher is in a vertically downward position at the pick-up port of the cabinet. The telescopic cylinder drives the inner anti-theft pusher to slide downward, so that the inner anti-theft pusher blocks inside the pick-up pusher, forming a double anti-theft system. The lower end of the inner anti-theft pusher is inserted into the anti-theft insert of the pick-up pusher, which increases the strong pushing resistance of the pick-up pusher and forms anti-theft before the goods are picked up.

[0020] Step 2: To retrieve the goods, slide the inner anti-theft push plate upward to unlock the retrieval push plate. The push rack on the outside of the inner anti-theft push plate meshes and rotates with the first gear, causing the second gear fixedly installed at the rear end of the first rotating rod to rotate synchronously. At the same time, the second gear drives the linkage gear below to rotate through meshing connection.

[0021] Step 3: During the retrieval process, the linkage anti-theft bar located below the first rotating rod inside the inner anti-theft rack is rotated by the linkage gear, causing the inner limit push plate to rotate and unfold outside the linkage anti-theft bar. After rotation, the parallel limit is located on both sides above the retrieval push plate and the rear stacked push plate, thus limiting the internal retrieval channel against theft.

[0022] Step 4: During the retrieval process, the retrieval pusher is pushed inward by manpower at the retrieval port of the cabinet. This causes the linkage mechanism formed by the first linkage shaft, the linkage push rod, and the second linkage shaft to synchronously drive the rear stack pusher to rotate upward. This allows the retrieval pusher and the rear stack pusher to overlap, sealing off the upper space of the cabinet retrieval port and forming an anti-theft system. Furthermore, the inner limit pusher is above the retrieval pusher and the rear stack pusher, preventing further forceful upward pushing of the retrieval pusher and the rear stack pusher, or the use of tools to pry open the retrieval pusher and the rear stack pusher, thus forming an anti-theft system for retrieval.

[0023] Compared with the prior art, the technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0024] Before retrieval, a telescopic cylinder drives the inner anti-theft push plate downwards, locking it into the anti-theft insert of the retrieval push plate. This not only strengthens the anti-theft capability of the inner anti-theft push plate at the retrieval opening before retrieval, but the engagement of the anti-theft insert and the inner anti-theft push plate also increases the resistance of the retrieval push plate, reducing damage to the interior of the retrieval box caused by forceful retrieval from the outside when no goods are retrieved. During retrieval, as the inner anti-theft push plate rises, it drives the meshing of the rack and pinion and the first gear, causing the second gear and the linkage gear to rotate synchronously. This unfolds the inner limit push plate from a vertical position to a position parallel to the upper sides of the retrieval push plate and the subsequent stacking push plate. Pushing the retrieval push plate inwards causes the subsequent stacking push plate and the retrieval push plate to overlap via the linkage push rod. Afterwards, it not only blocks the upward space of the unmanned locker's pickup opening, but also provides a good anti-theft effect when thieves use tools or force to push upwards and stack the push plate and pickup push plate. This prevents external thieves from stealing from inside the unmanned locker while picking up goods. In this way, the dual anti-theft measures when no one is picking up goods and the dual sealing measures when picking up goods work together to make the anti-theft device of the unmanned locker's pickup opening not only strengthen the sealing of the pickup opening, but also reduce the possibility of external people forcibly stealing goods from the pickup opening by increasing resistance. The enhanced anti-theft when no goods are picked up and the dual sealing when picking up goods also make the anti-theft device of the unmanned locker's pickup opening applicable to office buildings, shopping malls, scenic spots and other scenarios, especially suitable for the anti-theft needs of high-value goods, and has strong overall resistance to damage. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2This is a schematic diagram of the picking-up pusher structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the first linkage shaft structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the post-stacked pusher structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the internal anti-theft push plate structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the rack and pinion structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the inner limiting push plate structure of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Cabinet loading port; 2. Inner rotating shaft; 3. Loading push plate; 4. Fixing bolt; 5. Outer anti-pull plate; 6. First arc-shaped groove; 7. Second arc-shaped groove; 8. Anti-theft insert; 801. First linkage rotating shaft; 802. Linkage push rod; 803. Second linkage rotating shaft; 9. Fixed rotating shaft; 10. Rear stacking push plate; 11. Arc-shaped push frame; 12. Telescopic cylinder; 13. Inner anti-theft push plate; 1301. Limiting slide groove; 1302. Limiting slider; 14. Magnetic block; 15. Inner magnetic groove; 16. Push rack; 17. Inner anti-theft frame; 18. First rotating rod; 1801. First gear; 1802. Second gear; 1803. Linkage gear; 1804. Linkage anti-theft rod; 19. Inner limit push plate. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] This invention provides, for example Figure 1-7 The above-described anti-theft device for the pickup port of an unmanned cabinet includes a pickup port 1, an inner rotating shaft 2 rotatably connected inside the pickup port 1, a pickup push plate 3 fixedly installed outside the inner rotating shaft 2, an outer anti-pull plate 5 detachably connected to the outer side of the pickup port 1 by fixing bolts 4, a first arc-shaped groove 6 and a second arc-shaped groove 7 are provided on both sides of the outer side of the pickup port 1.

[0037] By using the first arc-shaped groove 6 and the second arc-shaped groove 7 set outside the rack retrieval port 1, the retrieval pusher 3 is pushed inward during retrieval, which in turn pushes up the stacking pusher 10 connected to the retrieval pusher 3, thereby overlapping and sealing the internal retrieval space.

[0038] The anti-theft inserts 8 located on both sides of the outside of the picking push plate 3 include a first linkage shaft 801. The first linkage shaft 801 is located inside the first arc groove 6. The outside of the first linkage shaft 801 is rotatably connected to a linkage push rod 802. The other end of the linkage push rod 802 is rotatably connected to a second linkage shaft 803.

[0039] By pushing the picking-up push plate 3, the first linkage shaft 801 connected to the picking-up push plate 3 slides inside the first arc-shaped groove 6 and moves along the internal trajectory of the first arc-shaped groove 6, causing the linkage push rod 802 to simultaneously pull the second linkage shaft 803, thereby lifting the superimposed push plate 10.

[0040] The fixed rotating shaft 9 located inside the rack access port 1 includes a rear stacked push plate 10. An arc-shaped push frame 11 is fixedly installed on the outside of the fixed rotating shaft 9. A telescopic cylinder 12 is fixedly installed on the upper part of the rack access port 1. An inner anti-theft push plate 13 is fixedly installed on the bottom output end of the telescopic cylinder 12. Limiting grooves 1301 are opened on both sides of the rack access port 1. Limiting sliders 1302 are slidably connected inside the limiting grooves 1301. Push racks 16 are fixedly installed on both sides of the inner anti-theft push plate 13.

[0041] The telescopic cylinder 12, used before pickup, causes the inner anti-theft push plate 13 to slide down, locking it into the anti-theft insert 8 of the pickup push plate 3. This strengthens the anti-theft capability of the inner anti-theft push plate 13 at the pickup slot of the self-service locker before pickup.

[0042] Furthermore, in the above structure, the linkage push rod 802 is located inside the first arc-shaped groove 6, and the second linkage rotating shaft 803 is located inside the second arc-shaped groove 7.

[0043] Furthermore, in the above structure, the end of the second linkage shaft 803 is fixedly connected to the outside of the rear stacked push plate 10, and the outside of the second linkage shaft 803 is rotatably connected to the arc-shaped push frame 11.

[0044] By pushing the picking-up push plate 3 inward, the first linkage shaft 801 and the second linkage shaft 803 both move upward in the first arc groove 6 and the second arc groove 7. Then, through the linkage push rod 802, the superimposed push plate 10 and the picking-up push plate 3 overlap, sealing the space above the picking-up port of the unmanned cabinet.

[0045] Furthermore, in the above structure, the inner anti-theft push plate 13 is slidably connected to the cabinet loading port 1, and the limiting slider 1302 is slidably connected to the inner anti-theft push plate 13.

[0046] The upper and lower sliding trajectory of the inner anti-theft push plate 13 is restricted by the limiting slide groove 1301 and the limiting slider 1302, so that the inner anti-theft push plate 13 engages with the anti-theft plug block 8 and locks itself after sliding down.

[0047] Furthermore, in the above structure, magnetic blocks 14 are fixedly installed on the outer surface of the picking push plate 3, and the bottom of the stacked push plate 10 is provided with an inner magnetic groove 15.

[0048] Furthermore, in the above structure, the magnetic block 14 fixedly installed on the outside of the picking push plate 3 is magnetically connected to the inner magnetic groove 15 opened at the bottom of the rear stacked push plate 10, and the inner anti-theft push plate 13 is used in conjunction with the anti-theft plug 8.

[0049] After the picking pusher 3 overlaps with the rear stacking pusher 10, the magnetic block 14 and the inner magnetic groove 15 magnetically attract each other, thus avoiding the need for manual lifting of the picking pusher 3, freeing up the picking space of the unmanned cabinet and making it convenient for shoppers to pick up goods.

[0050] Furthermore, in the above structure, an inner anti-theft frame 17 is fixedly installed on both sides above the cabinet loading port 1. The inner anti-theft frame 17 is rotatably connected to a first rotating rod 18, and a first gear 1801 is fixedly installed at the front end of the first rotating rod 18.

[0051] Furthermore, in the above structure, a second gear 1802 is fixedly installed at the rear end of the first rotating rod 18, a linkage gear 1803 is externally meshed with the second gear 1802, and a linkage anti-theft rod 1804 is fixedly installed on the outside of the linkage gear 1803.

[0052] Furthermore, in the above structure, an inner limit push plate 19 is fixedly installed on the outside of the linkage anti-theft rod 1804, and the inner limit push plate 19 is rotatably connected to the inner anti-theft frame 17.

[0053] By sliding the inner anti-theft push plate 13 upward, the inner limit push plate 19 unfolds under the linkage rotation of the second gear 1802 and the linkage gear 1803. After closing the internal retrieval space of the retrieval push plate 3 and the rear stacked push plate 10, it continues to push upward to block and isolate the current retrieval space.

[0054] A method for preventing theft at the pickup slot of an unmanned vending machine includes the anti-theft device for the pickup slot of the unmanned vending machine as described above, and the specific processing steps are as follows:

[0055] Step 1: Before anyone picks up the goods, the picking push plate 3 is in a vertically downward position at the picking port 1 of the cabinet. The telescopic cylinder 12 drives the inner anti-theft push plate 13 to slide downward, so that the inner anti-theft push plate 13 blocks inside the picking push plate 3 and forms a double anti-theft system with the picking push plate 3. The lower end of the inner anti-theft push plate 13 is inserted into the anti-theft plug 8 of the picking push plate 3, which increases the strong pushing anti-theft resistance of the picking push plate 3 and forms anti-theft before picking up the goods.

[0056] Step 2: Take the goods. The inner anti-theft push plate 13 slides upward to unlock the take-up push plate 3. The push rack 16 on the outside of the inner anti-theft push plate 13 meshes and rotates with the first gear 1801, causing the second gear 1802 fixedly installed at the rear end of the first rotating rod 18 to rotate synchronously. At the same time, the second gear 1802 drives the linkage gear 1803 below to rotate through meshing connection.

[0057] Step 3: During the retrieval process, the linkage anti-theft rod 1804 located below the first rotating rod 18 inside the inner anti-theft frame 17 is rotated by the linkage gear 1803, causing the inner limit push plate 19 to rotate and unfold outside the linkage anti-theft rod 1804. After rotation, it is parallel to the upper sides of the retrieval push plate 3 and the rear stacked push plate 10, thus limiting the internal retrieval channel against theft.

[0058] Step 4: During the retrieval process, the retrieval pusher 3 is pushed inward by manpower at the retrieval port 1 of the cabinet. This causes the linkage mechanism formed by the first linkage shaft 801, the linkage push rod 802, and the second linkage shaft 803 to synchronously drive the rear stacked pusher 10 to rotate upward. This allows the retrieval pusher 3 and the rear stacked pusher 10 to overlap, sealing off the upper space of the retrieval port 1 of the cabinet and forming an anti-theft system. Furthermore, the inner limit pusher 19 is above the retrieval pusher 3 and the rear stacked pusher 10, which can prevent the retrieval pusher 3 and the rear stacked pusher 10 from being pushed upward by force, or the retrieval pusher 3 and the rear stacked pusher 10 from being pried open by tools, thus forming an anti-theft system for retrieval.

[0059] Working principle of this invention:

[0060] Refer to the instruction manual appendix Figure 1 - Figure 7When using the anti-theft device at the pickup slot of the self-service locker, under normal conditions, the telescopic cylinder 12 drives the inner anti-theft push plate 13 to slide down before pickup, causing the inner anti-theft push plate 13 to lock into the anti-theft insert 8 of the pickup push plate 3. This not only strengthens the anti-theft capability of the inner anti-theft push plate 13 at the pickup slot before pickup, but also increases the resistance of the pickup push plate 3 by the fit between the anti-theft insert 8 and the inner anti-theft push plate 13, reducing the damage to the inside of the self-service locker caused by forceful pickup from the outside when pickup is not made. After the purchaser has paid, the goods fall into the pickup slot of the self-service locker, and then the self-service locker controls the telescopic cylinder 12 to extend and retract, causing the inner anti-theft push plate 13 to slide upward and unlock. Then, the inner anti-theft push plate 13 rises and unlocks. The meshing of the push racks 16 on both sides and the first gear 1801 drives the second gear 1802 and the linkage gear 1803 to rotate synchronously, causing the inner limit push plate 19 to unfold from a vertical state to a state parallel to the upper sides of the picking push plate 3 and the rear stacked push plate 10. In this way, the external picking personnel can normally push the picking push plate 3 inward to make the first linkage shaft 801 and the second linkage shaft 803 move upward in the first arc groove 6 and the second arc groove 7. After being linked by the linkage push rod 802, the rear stacked push plate 10 and the picking push plate 3 overlap, closing the space above the picking port of the unmanned cabinet. At this time, as the rear stacked push plate 10 and the picking push plate 3 overlap, the magnetic block 14 and the inner magnetic groove 15 magnetically attract each other. This avoids the need for manual lifting of the retrieval pusher 3, freeing up space at the retrieval opening of the unmanned vending machine and making it easier for shoppers to retrieve their goods. Furthermore, the inner limit pusher 19, after overlapping with the rear stacked pusher 10 and the retrieval pusher 3, not only blocks the upward movement of the retrieval opening but also provides good anti-theft protection against thieves using tools or force to push upwards on the rear stacked pusher 10 and the retrieval pusher 3. This prevents external thieves from stealing from the unmanned vending machine. After retrieval, the telescopic cylinder 12 simply moves the inner anti-theft pusher 13 downwards, and the inner limit pusher 19, which rotates and engages with the inner anti-theft pusher 13, also resets downwards, thus providing protection for the overlapping rear stacked pusher 10 and the retrieval pusher 3. The downward pressure of plate 3 separates the magnetically attached rear stacked push plate 10 and the retrieval push plate 3, causing the retrieval push plate 3 and the rear stacked push plate 10 to slide downwards and reset due to gravity. This allows the inner anti-theft push plate 13 to form a double anti-theft system inside the retrieval push plate 3. In this way, the double anti-theft system when no one is retrieving the goods and the double sealing system when retrieving the goods work together to not only enhance the sealing of the retrieval opening but also reduce the possibility of external personnel forcibly stealing the goods from the retrieval opening by increasing resistance. The enhanced anti-theft system when no goods are retrieved and the double sealing system when retrieving the goods make the retrieval opening anti-theft system applicable to office buildings, shopping malls, scenic spots and other scenarios. It is especially suitable for the anti-theft needs of high-value goods and has strong overall resistance to damage.

[0061] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An anti-theft device for the pickup slot of an unmanned vending machine, comprising a pickup slot (1) of the vending machine, characterized in that: The cabinet retrieval port (1) is internally connected to an inner rotating shaft (2), and a retrieval push plate (3) is fixedly installed on the outside of the inner rotating shaft (2). An outer anti-pull plate (5) is detachably connected to the outside of the cabinet retrieval port (1) by a fixing bolt (4). A first arc-shaped groove (6) is provided on both sides of the outside of the cabinet retrieval port (1), and a second arc-shaped groove (7) is provided on both sides of the outside of the cabinet retrieval port (1). The anti-theft inserts (8) set on both sides of the outside of the picking push plate (3) include a first linkage shaft (801), the first linkage shaft (801) is located inside the first arc groove (6), the outside of the first linkage shaft (801) is rotatably connected to a linkage push rod (802), and the other end of the linkage push rod (802) is rotatably connected to a second linkage shaft (803). The fixed rotating shaft (9) located inside the rack retrieval port (1) includes a rear stacked push plate (10). An arc-shaped push frame (11) is fixedly installed on the outside of the fixed rotating shaft (9). A telescopic cylinder (12) is fixedly installed above the inside of the rack retrieval port (1). An inner anti-theft push plate (13) is fixedly installed at the bottom output end of the telescopic cylinder (12). Limiting grooves (1301) are opened on both sides inside the rack retrieval port (1). Limiting sliders (1302) are slidably connected inside the limiting grooves (1301). Push racks (16) are fixedly installed on both sides outside the inner anti-theft push plate (13). An inner anti-theft frame (17) is fixedly installed on both sides above the rack retrieval port (1). The frame (17) is internally rotatably connected to a first rotating rod (18). A first gear (1801) is fixedly installed at the front end of the first rotating rod (18). The push rack (16) outside the inner anti-theft push plate (13) meshes and rotates with the first gear (1801). A second gear (1802) is fixedly installed at the rear end of the first rotating rod (18). A linkage gear (1803) is meshed and connected to the outside of the second gear (1802). A linkage anti-theft rod (1804) is fixedly installed outside the linkage gear (1803). An inner limit push plate (19) is fixedly installed outside the linkage anti-theft rod (1804). The inner limit push plate (19) is rotatably connected to the inner anti-theft frame (17).

2. The anti-theft device for the pickup slot of an unmanned locker according to claim 1, characterized in that: The linkage push rod (802) is located inside the first arc groove (6), and the second linkage rotating shaft (803) is located inside the second arc groove (7).

3. The anti-theft device for the pickup slot of an unmanned locker according to claim 2, characterized in that: The end of the second linkage shaft (803) is fixedly connected to the outside of the rear stacked push plate (10), and the outside of the second linkage shaft (803) is rotatably connected to the arc-shaped push frame (11).

4. The anti-theft device for the pickup slot of an unmanned locker according to claim 1, characterized in that: The inner anti-theft push plate (13) is slidably connected to the cabinet loading port (1), and the limiting slider (1302) is slidably connected to the inner anti-theft push plate (13).

5. The anti-theft device for the pickup slot of an unmanned vending machine according to claim 1, characterized in that: The outer surface of the picking push plate (3) is fixedly equipped with magnetic blocks (14), and the bottom of the rear stacking push plate (10) is provided with an inner magnetic groove (15).

6. The anti-theft device for the pickup slot of an unmanned vending machine according to claim 5, characterized in that: The magnetic block (14) fixedly installed on the outside of the picking push plate (3) is magnetically connected to the inner magnetic groove (15) opened at the bottom of the rear stacked push plate (10). The inner anti-theft push plate (13) is used in conjunction with the anti-theft plug (8).

7. A method for preventing theft at the pickup slot of an unmanned vending machine, comprising the anti-theft device for the pickup slot of the unmanned vending machine as described in any one of claims 1-6, characterized in that: The specific processing steps are as follows: Step 1: Before anyone picks up the goods, the pick-up pusher (3) is in a vertically downward position at the pick-up port (1) of the cabinet. The telescopic cylinder (12) drives the inner anti-theft pusher (13) to slide downward, so that the inner anti-theft pusher (13) blocks inside the pick-up pusher (3) and forms a double anti-theft system with the pick-up pusher (3). The lower end of the inner anti-theft pusher (13) is inserted into the anti-theft insert (8) of the pick-up pusher (3), which enhances the strong push anti-theft resistance of the pick-up pusher (3) and forms anti-theft before picking up the goods. Step 2: Take the goods. The inner anti-theft push plate (13) slides upward to unlock the take-up push plate (3), so that the second gear (1802) fixedly installed at the rear end of the first rotating rod (18) also rotates synchronously. At the same time, the second gear (1802) drives the linkage gear (1803) below to rotate through meshing connection. Step 3: During the retrieval process, the linkage anti-theft bar (1804) located below the first rotating rod (18) inside the inner anti-theft frame (17) is rotated by the linkage gear (1803), causing the inner limit push plate (19) to rotate and unfold outside the linkage anti-theft bar (1804). After rotation, the parallel limit is located on both sides above the retrieval push plate (3) and the rear stacked push plate (10), thus limiting the internal retrieval channel against theft. Step 4: During the picking process, the picking push plate (3) is pushed inward by manpower at the picking port (1) of the cabinet, so that the linkage mechanism formed by the first linkage shaft (801), the linkage push rod (802) and the second linkage shaft (803) drives the rear stacked push plate (10) to rotate upward, so that the picking push plate (3) and the rear stacked push plate (10) overlap each other, which can close the upper space of the picking port (1) of the cabinet, forming an anti-theft system. In addition, the inner limit push plate (19) is above the picking push plate (3) and the rear stacked push plate (10), which can prevent the picking push plate (3) and the rear stacked push plate (10) from being violently pushed upward, or tools can be used to pry open the picking push plate (3) and the rear stacked push plate (10) to form an anti-theft system for picking.

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