Anti-theft label and electric unlocking device thereof

Abstract

The invention relates to an anti-theft label and an electric unlocking device thereof. The electric unlocking device corresponds to a locking mechanism of the anti-theft label, the unlocking device motor is combined with the annular magnet, when the electric unlocking device is started, the annular magnet in the electric unlocking device rotates in the circumferential direction to drive an iron annular rotor and a rotary inclined pressing piece in the locking mechanism to rotate in the same direction, and due to the fact that the rotary inclined pressing piece is limited by a positioning shaft, the anti-theft label is locked. During rotation, the positioning shaft relatively moves from the highest point to the lowest point of the chute, the rotary inclined pressing piece is driven to move upwards to abut against the upper positioning seat, then the pressing block is pressed to drive the lock cylinder to move downwards to compress the spring, and when the positioning shaft moves to the lowest point of the chute, the lock cylinder moves downwards to an unlocking position; and when the locking mechanism leaves the electric unlocking device or closes the electric unlocking device, the magnetic force effect is lost, the lock cylinder is propped and reset by the spring, and the positioning shaft is reset to the highest point of the chute. Due to the fact that the iron annular rotor is adopted in the anti-theft label, cost is lower, safe unlocking can be achieved only by adopting an electric unlocking mechanism, and the anti-theft effect is greatly improved.

Description

Technical Field

[0001] This invention relates to an anti-theft tag and its electric unlocking device, which is widely used for anti-theft of goods in stores or supermarkets. Background Technology

[0002] Anti-theft tags are a widely used anti-theft product in shopping malls. They are attached to goods for sale, and when a product passes through a mall exit without the tag being removed by a cashier, an alarm signal is triggered, alerting mall security personnel. However, the security of anti-theft tags generally decreases after several years of use; therefore, new anti-theft tag products are constantly being developed and updated.

[0003] The inventor of this application has been dedicated to the research and development and production of anti-theft tags for many years. Their invention patent number ZL20091004745.43 discloses a magnetic thrust anti-theft tag, comprising a shell consisting of a top cover and a base. A coil alarm and an anti-theft nail locking mechanism are located between the top cover and the base. The anti-theft nail is inserted into the shell from the top cover and positioned by the locking mechanism. The locking mechanism includes: a trapezoidal locking bead cap, a locking bead fixing seat matching the inner cavity of the locking bead cap, at least three locking beads, and a spring device abutting against the locking bead fixing seat. A magnetic unlocking device corresponds to the locking mechanism and opens it. The locking mechanism is equipped with a magnetic switch device. A magnetic block within the magnetic switch device is pushed away from the magnet by a magnet within the unlocking device, causing the magnetic block to push the locking mechanism open. This method opens the locking mechanism through magnetic thrust rather than traditional magnetic attraction, providing a simple, easy, safe, and reliable form for commonly used anti-theft tags.

[0004] Subsequently, the applicant improved the aforementioned anti-theft structure, and the invention patent number 201320522186.8 describes an anti-theft tag, including a shell and an anti-theft nail locking mechanism. The anti-theft nail is inserted into the shell and locked in place by the locking mechanism, and unlocked by a magnetic unlocking device. The locking mechanism, from top to bottom, includes: a locking bead cap, a locking bead fixing seat matching the inner cavity of the locking bead cap, no less than three locking beads, and a spring abutting against the locking bead fixing seat. Below the locking bead fixing seat... A limiting device is fitted onto the base, and the limiting device has a through hole inside and a pair of radially symmetrical wing-shaped inclined surfaces that are flat on top and converge downwards on the outer periphery. The protruding part of the bottom of the locking ball fixing seat is fitted onto the through hole, and a spring passes through the through hole. At least one steel ball is supported on the bottom surface of the limiting device. The steel ball is placed at the lowest point of the inclined surface of the base and can roll along the inclined surface under the action of magnetic force, thereby losing support for the limiting device and achieving safe unlocking.

[0005] However, the applicant's aforementioned anti-theft tag products all use a combination of magnets to form a unlocking mechanism. With the understanding of the magnetic unlocking mechanism and the availability of magnets on the market, the original anti-theft effect of the anti-theft tag is weakened through combination.

[0006] Therefore, the applicant disclosed an electric anti-theft tag in its invention patent number 202110892379.1. This tag utilizes a brushless motor. When powered on, the winding stator in the motor generates an electromagnetic field that drives the magnetic rotor inside the anti-theft tag to rotate and unlock. The locking mechanism includes a lock cylinder, a conical steel cup at the top of the lock cylinder, an annular magnetic rotor fixed to the lock cylinder, and a spring at the bottom of the lock cylinder. When the electric unlocking device is triggered, the brushless motor, when powered on, generates a rotating electromagnetic field in the winding stator, driving the annular magnetic rotor located at the center of the magnetic field to rotate circumferentially. Since the lock cylinder cannot rotate circumferentially, the movement of the protrusion and cam causes the lock cylinder to move upwards, which in turn presses the cam, causing the lock cylinder to move downwards and compress the spring. When the protrusion moves to near the crest, the lock cylinder moves downwards to the unlocking position of the lower positioning seat, unlocking the tag. When the locking mechanism leaves the electric unlocking device or the electric unlocking device is closed, the power and magnetism are lost, the lock cylinder is pushed back to its original position by the spring, and the protrusion naturally slides down to the trough of the cam, causing the annular magnetic rotor to reset.

[0007] However, during the patent application process, the applicant discovered that the aforementioned electric anti-theft tag and its unlocking device significantly increased in cost compared to the original magnetic anti-theft tag and its unlocking device. Therefore, it is necessary to further improve the unlocking structure of the anti-theft tag and its electric unlocking device.

[0008] However, during the patent process, the inventors discovered that the inclined rotor inside the anti-theft tag requires multiple permanent magnets, and the cost of just these magnets exceeds the price of finished anti-theft tags on the market. Therefore, it is necessary to further improve the unlocking structure of the anti-theft tag and its unlocking device. Summary of the Invention

[0009] To address the aforementioned shortcomings, the present invention aims to provide an anti-theft tag that, through improvements to the locking bead-stopping locking mechanism, allows the locking bead to be moved away only through electric unlocking, thus achieving secure unlocking of the locking mechanism, while also being cost-effective.

[0010] Another object of the present invention is to provide an electric unlocking device corresponding to the above-mentioned anti-theft tag.

[0011] The objective of this invention is achieved through the following technical solution: an anti-theft tag, comprising a shell consisting of a top cover and a bottom shell, wherein an anti-theft nail locking mechanism is provided between the top cover and the bottom shell, the anti-theft nail is inserted into the shell from the top cover and locked in place by the locking mechanism, and unlocked by an electric unlocking device, wherein: the locking mechanism is fixed between upper and lower positioning seats inside the shell, and includes: A lock cylinder with a central through hole and three locking bead embedding parts evenly distributed around the upper part of the lock cylinder. The locking bead embedding parts contain non-magnetic locking beads, and the outer side has a lock cylinder step part with a narrower radius at the top and a wider radius at the bottom. A conical steel bowl is fixed inside the upper positioning seat and fastened to the upper part of the lock cylinder. The locking ball is limited by the conical surface of the inner wall of the steel bowl. A pressure block has a central through hole and positioning shafts on both sides. It is fitted around the outside of the lock cylinder from top to bottom. The inner side of the central through hole of the pressure block has a pressure block step that is narrower at the top and wider at the bottom. The lock cylinder step and the pressure block step limit each other. During assembly, the positioning shaft is stuck in the positioning groove of the upper or lower positioning seat, so that the pressure block can only move up and down along the positioning groove and cannot rotate circumferentially. A rotating inclined pressing component is provided with a central through hole, a fixed annular rotor is embedded in the upper part, and two symmetrical inclined grooves are provided in the lower part. It is fitted around the outside of the pressing block from top to bottom, and the positioning shaft is embedded in the inclined groove, so that the rotating inclined pressing component can only rotate under the mutual restriction of the positioning shaft and the space in the inclined groove. A spring is located at the bottom of the lock cylinder. The lower end of the spring abuts against the upper surface inside the lower positioning seat, and the upper end of the spring lifts the lock cylinder, forcing the locking ball on the lock cylinder to be pressed inward by the inner wall of the steel cup to tighten the anti-theft pin. When the anti-theft pin is inserted, the locking ball clamps the anti-theft pin, and at the same time, the lock cylinder lifts the pressure block. Under the combined action of the gravity of the rotating inclined pressure component and the elastic force of the spring, the positioning shaft is always at the highest point of the inclined groove. The combination of the motor and the ring magnet in the electric unlocking device corresponds to the locking mechanism in the anti-theft tag. When the electric unlocking device is activated, the ring magnet inside the electric unlocking device rotates circumferentially, driving the rotating inclined pressure component with the ring rotor fixed inside the locking mechanism to rotate circumferentially. Since the rotating inclined pressure component is limited by the positioning shaft, the positioning shaft moves relative to the lowest point of the inclined groove during rotation, causing the rotating inclined pressure component to move upward to abut against the upper positioning seat, and then presses the pressure block to drive the lock cylinder downward to compress the spring. When the positioning shaft moves to the lowest point of the inclined groove, the lock cylinder moves downward to the unlock position. When the locking mechanism of the anti-theft tag leaves the electric unlocking device or the electric unlocking device is closed, it loses its magnetic force, the lock cylinder is pushed back by the spring, and the positioning shaft is reset to the highest point of the inclined groove.

[0012] Because anti-theft tags must be unlocked electrically, their security and reliability are improved; the ring magnet in the electric unlocking device is less expensive than a wound stator.

[0013] Based on the above scheme, a limiting groove is provided at the highest point of the inclined groove so that when the external magnetic force does not meet the set magnetic force Gauss strength, the rotating inclined pressure component cannot rotate and the positioning shaft cannot leave the highest point of the inclined groove.

[0014] Based on the above scheme, the upper positioning seat and the top cover of the label are integrated into one structure, and the lower positioning seat and the bottom shell of the label are integrated into one structure.

[0015] Based on the above scheme, the annular rotor is an iron annular rotor composed of one or more iron balls, iron blocks, iron pillars, or iron sheets, or a magnetic ring composed of one or more magnetic balls, magnetic blocks, magnetic pillars, or magnetic rings with N, N poles, a split magnetic ring, an integral magnetic ring, a multi-pole magnetic ring, multiple magnetic rings, or magnetic rings magnetized in different directions, which are fixed on the rotating inclined pressure component.

[0016] In the design of the anti-theft tag of this invention, when the annular rotor is composed of multiple iron parts, the cost can be greatly reduced, and the market prospect is very broad.

[0017] Based on the above solution, the bottom shell of the anti-theft tag and the top cover of the electric unlocking device are provided with corresponding protrusions and grooves. Only when the protrusions and grooves are engaged can the circumferential rotation of the annular magnet inside the electric unlocking device drive the annular rotor inside the anti-theft tag to rotate in the same direction to unlock it.

[0018] Based on the above solution, the anti-theft tag is equipped with AM and RF coils. If someone attempts to take the anti-theft tag out of the store, an alarm will be automatically triggered.

[0019] The present invention also provides an electric unlocking device for unlocking the aforementioned anti-theft tag. The electric unlocking device corresponds to the locking mechanism of the anti-theft tag. The electric unlocking device includes a top cover, a ring magnet, a motor, and a controller. The controller controls the motor to start, causing the ring magnet to rotate circumferentially, driving the ring rotor inside the anti-theft tag to rotate in the same direction to unlock it.

[0020] The control system in the electronic lock pick is set to unlock by rotating forward, and can also be rotated backward to assist in resetting the lock cylinder of the anti-theft tag.

[0021] The top cover of the electric unlocking device has a concave or convex surface that matches the shape of the bottom shell of the anti-theft tag. The concave / convex surface and the bottom shell of the anti-theft tag have corresponding protrusions or grooves, and the corresponding protrusions or grooves can be quickly positioned.

[0022] Only when the protrusion and the groove are engaged can the circumferential rotation of the annular magnet inside the electric unlocking device drive the annular rotor inside the anti-theft tag to rotate in the same direction. The rotating oblique pressing part inside the anti-theft tag rotates and unlocks the device in accordance with the annular magnet of the electric unlocking device.

[0023] The magnetic force between the annular magnet in the electric lock pick and the annular rotor of the anti-theft tag ensures that the protrusions and grooves fit together tightly. When the mall closes and the power is cut off or there is an emergency power outage, if someone attempts to forcefully rotate the anti-theft tag on the electric lock pick to unlock it, the tag will bounce up and down, causing the annular rotor in the tag to become misaligned with the annular magnet in the lock pick. This prevents it from rotating smoothly and affects the magnetic attraction between the annular magnet and the annular rotor, thus making it impossible to unlock.

[0024] Based on the above solution, the controller includes a pressure-sensitive switch that extends from the center of the concave surface. When the bottom shell of the anti-theft tag engages with the corresponding protrusions and grooves on the top cover of the unlocker, the pressure-sensitive switch is triggered, controlling the motor to start unlocking. The anti-theft tag automatically shuts off when it is removed from the power source, making operation more convenient.

[0025] Based on the above scheme, the annular magnet is fixed inside the magnet fixing component, and the magnet fixing component is connected to the drive shaft of the motor.

[0026] Based on the above scheme, the annular magnet is a Hellbeck array magnet. Several magnets with different magnetization directions are combined using the Hellbeck array method, and the magnetic poles of the magnetic ring can be set on the inner wall of the annular magnet hole or on the surface of the annular magnet. The setting of the magnetic ring pole face can be matched according to the different positions of the upper, middle, and lower parts of the annular rotor in the rotating inclined pressure component of the anti-theft tag.

[0027] The inner hole of the Heilbeck magnet has a magnetic attraction function. When the anti-theft tag is placed on the electric unlocking device, it is immediately attracted by the magnetic force of the inner hole of the Heilbeck magnet, so that the protrusion and the groove are engaged and positioned.

[0028] When the electric unlocking device is triggered, the annular magnet inside the unlocking device drives the rotating inclined pressure component embedded in the annular rotor in the anti-theft tag locking mechanism to rotate circumferentially. Since the rotating inclined pressure component is limited by the positioning shaft, the positioning shaft moves relative to the highest point of the inclined groove during rotation, causing the rotating inclined pressure component to move upward to abut against the upper positioning seat, and then presses the pressure block to drive the lock cylinder to move downward to compress the spring. When the positioning shaft moves to the lowest point of the inclined groove, the lock cylinder moves downward to the unlock position. When the anti-theft tag locking mechanism is disengaged from the electric unlocker or the unlocker is closed, it loses its magnetic force, the lock cylinder is pushed back by the spring, and the positioning shaft is reset to the highest point of the inclined groove.

[0029] The beneficial effects of this invention are: the anti-theft tag of this invention uses an iron ring rotor or other iron components, which is cheaper, and an electric unlocking mechanism is required to drive the ring rotor to rotate, so that the lock cylinder moves down, loosens the anti-theft nail, and achieves safe unlocking of the locking mechanism, thus greatly improving the anti-theft effect. At the same time, the ring magnet in the electric unlocking device also greatly reduces the cost of the electric unlocking device compared to the wound stator. Attached Figure Description

[0030] Figure 1 Example 1: Schematic diagram of the anti-theft tag disassembly; Figure 2 Example 1: Schematic diagram of the rotating oblique pressure component structure; Figure 3 Example 1: Schematic diagram of the cross-sectional structure of the anti-theft tag in the uninserted state; Figure 4 Example 1: Cross-sectional view of the anti-theft tag pin in locked state; Figure 5 Example 1: Exploded view of the electric unlocking device; Figure 6 Example 1: Schematic diagram of the cross-sectional structure of the electric unlocking device in the unlocked state; Figure 7 Example 2: Schematic diagram of the rotating inclined pressure component structure; Explanation of the labels in the diagram: 100 - Anti-theft tag; 110 - Anti-theft nails; 120 — casing; 121 – Top cover; 122 – Bottom shell; 123 – Groove; 130 — Upper positioning seat; 140 - Steel bowl; 150 — Lock cylinder; 151 – Lock cylinder step section; 152 – Locking bead insertion section; 153 – Locking bead; 160 — Pressed block; 161—Step section of the pressing block; 162—Positioning shaft; 170, 170' — Rotating oblique pressing component; 171, 171' – Annular rotor; 172, 172' – Inclined slots; 180—Spring; 190 – Lower positioning seat; 191—Positioning groove; 200—Electric lock pick; 210—Top cover; 211 – concave surface; 212 – convex surface; 220—Toroidal magnet; 221—Magnet fixing component; 230 — Electric motor; 240 — Controller; 241 — Touch switch. Detailed Implementation

[0031] Example 1 like Figure 1-6 As shown, this embodiment is an anti-theft tag 100 and its matching electric unlocking device 200.

[0032] like Figures 1 to 4As shown, the anti-theft tag 100 includes a housing 120 composed of a top cover 121 and a bottom cover 122. An anti-theft nail locking mechanism is provided between the top cover 121 and the bottom cover 122. An anti-theft nail 110 is inserted into the housing from the top cover 121 and locked in place by the locking mechanism. It is unlocked by an electric unlocking device 200. The electric unlocking device 200 corresponds to the locking mechanism of the anti-theft tag 100. The locking mechanism is fixed between an upper positioning seat 130 and a lower positioning seat 190 within the housing 120 and includes: A lock cylinder 150 has a central through hole and three locking bead embedding parts 152 are evenly distributed around the upper part of the lock cylinder. The locking bead embedding parts 152 have non-magnetic locking beads 153 inside and a lock cylinder step part 151 with a narrower radius at the top and a wider radius at the bottom on the outside. A conical steel cup 140 is fixed inside the upper positioning seat 130 and fastened to the upper part of the lock cylinder 150. The locking ball 153 is limited by the conical surface of the inner wall of the steel cup 140. A pressure block 160 has a central through hole and positioning shafts 162 on both sides. It is fitted around the lock cylinder 150 from top to bottom. The inner side of the central through hole of the pressure block 150 has a pressure block step 161 that is narrow at the top and wide at the bottom. The lock cylinder step 151 and the pressure block step 161 limit each other. During assembly, the positioning shafts 162 are locked in the positioning groove 191 of the lower positioning seat 190, so that the pressure block 160 can only move up and down along the positioning groove 191 and cannot rotate circumferentially. A rotating oblique pressing component 170, such as Figure 1 and 2 As shown, a rotating inclined pressing component has a central through hole, an annular rotor 171 is fixed on the upper part, the annular rotor 171 consists of six evenly distributed annular iron balls, and two symmetrical inclined grooves 172 are provided on the lower part. The highest point of the inclined groove 172 is provided with a limiting groove, which is sleeved on the outside of the pressing block 160 from top to bottom. The positioning shaft 162 is embedded in the inclined groove 172, so that the rotating inclined pressing component 170 can only rotate under the mutual limiting of the positioning shaft 162 and the space within the inclined groove 172. A spring 180 is located at the bottom of the lock cylinder 150. The lower end of the spring 180 abuts against the upper surface inside the lower positioning seat 190, and the upper end of the spring 180 pushes up the lock cylinder 180, forcing the locking ball 153 on the lock cylinder 150 to be pressed inward by the inner wall of the steel cup 140. When the anti-theft nail 110 is inserted, the locking ball 153 clamps the anti-theft nail 110. At the same time, the lock cylinder 150 pushes up the pressure block 160. Under the combined action of the gravity of the rotating inclined pressure member 170 and the elastic force of the spring 180, the positioning shaft 162 is always at the highest point of the inclined groove 172. Electric lock pick 200, such as Figure 5As shown, the device includes a top cover 210, an annular magnet 220, a motor 230, and a controller 240. The top cover 210 has a concave surface 211 that matches the shape of the bottom shell 122 of the anti-theft tag 100. The concave surface 211 and the bottom shell 122 have corresponding protrusions 212 and grooves 123. The annular magnet 220 is a Heilbeck magnet and is fixed in a magnet fixing member 221. The magnet fixing member 221 is connected to the drive shaft of the motor 230. The controller 240 includes a touch switch 241 that extends from the center of the concave surface 211. When the protrusion 212 of the electric unlocking device engages with the groove 123 of the anti-theft tag, as... Figure 6 As shown, when the touch switch 241 is triggered, the control motor 230 starts, causing the annular magnet 220 to rotate circumferentially, driving the rotating inclined pressing member 170, which has an annular rotor 171 fixed inside the locking mechanism, to rotate in the same direction. Since the rotating inclined pressing member 170 is limited by the positioning shaft 162, when rotating, the positioning shaft 162 moves relative to the lowest point of the inclined groove 172, causing the rotating inclined pressing member 170 to move upward to abut against the upper positioning seat 130, and then presses the pressing block 160, causing the lock cylinder 150 to move downward to compress the spring 180. When the positioning shaft 162 moves to the lowest point of the inclined groove 172, the lock cylinder 150 moves downward to the unlocked position. When the locking mechanism is disengaged from the electric unlocking device 200 or when the electric unlocking device 200 is closed, it loses its magnetic force, the lock cylinder 150 is pushed back by the spring 180, and the positioning shaft 162 is reset to the highest point of the inclined groove 172.

[0033] The controller 240 in the electric unlocking device 200 sets the motor 230 to rotate forward to unlock, and can also rotate backward to assist the lock cylinder 150 of the anti-theft tag 100 in resetting.

[0034] The inner hole of the Helbeck magnet has a magnetic downward attraction effect. When the anti-theft tag is placed on the electric unlocking device, it is immediately attracted downward by the magnetic force of the inner hole of the Helbeck magnet, causing the protrusion and groove to engage tightly. When the mall closes and the power is cut off or there is an emergency power outage, if someone attempts to forcibly turn the anti-theft tag on the electric unlocking device to unlock it, the anti-theft tag will bounce up and down, causing the annular rotor in the anti-theft tag to become misaligned with the annular magnet in the unlocking device. This prevents it from rotating smoothly, affecting the magnetic attraction between the annular magnet and the annular rotor, and thus making it impossible to unlock.

[0035] The annular magnet 220 inside the electric unlocking device 200 and the locking mechanism inside the anti-theft tag 100 are carefully designed to prevent ordinary people from easily obtaining them. Since the anti-theft tag 100 must be unlocked electrically, its security and reliability are enhanced. Furthermore, the annular magnet 220 in the electric unlocking device 200 is less expensive than a wound stator.

[0036] The electric unlocking device 200 corresponds to the locking mechanism of the anti-theft tag 100. The unlocking device motor 230 and the annular magnet 220 are combined. When the electric unlocking device is started, the annular magnet 220 rotates circumferentially, driving the annular rotor 171 and the rotating inclined pressure member 170 in the locking mechanism to rotate in the same direction. Since the rotating inclined pressure member 170 is limited by the positioning shaft 162, the positioning shaft 162 moves relative to the lowest point of the inclined groove 172 during rotation, driving the rotating inclined pressure member 170 to move upward to abut against the upper positioning seat 130, and then pressing the pressure block 160 to drive the lock cylinder 150 to move downward to compress the spring 180. When the positioning shaft 162 moves to the lowest point of the inclined groove 172, the lock cylinder 150 moves downward to the unlock position. When the locking mechanism of the anti-theft tag 100 is removed from the electric unlocker 200 or the electric unlocker 200 is closed, it loses its magnetic force, the lock cylinder 150 is pushed back by the spring 180, and the positioning shaft 162 is reset to the highest point of the inclined groove 172.

[0037] In this embodiment, the anti-theft tag 100 is equipped with an AM or RF coil. If the anti-theft tag 100 is taken out of the store without being removed from the product, an alarm will be automatically triggered.

[0038] Example 2 An anti-theft tag, whose structure is basically the same as that of Embodiment 1, except that the rotating inclined pressing member 170' has a six-claw iron plate type annular rotor 171' fixed on its upper part, as shown below. Figure 7 As shown, the other structures are the same as in Example 1.

[0039] When the protrusion 212 of the electric unlocking device 200 engages with the groove 123 of the anti-theft tag 100, as Figure 6 As shown, when the touch switch 241 is triggered, the control motor 230 starts, causing the annular magnet 220 to rotate circumferentially, driving the rotating inclined pressure member 170', which has an annular rotor 171' fixed inside the locking mechanism, to rotate in the same direction. Since the rotating inclined pressure member 170' is limited by the positioning shaft 162, the positioning shaft 162 moves relative to the lowest point of the inclined groove 172' during rotation, causing the rotating inclined pressure member 170' to move upward to abut against the upper positioning seat 130, and then presses the pressure block 160, causing the lock cylinder 150 to move downward to compress the spring 180. When the positioning shaft 162 moves to the lowest point of the inclined groove 172', the lock cylinder 150 moves downward to the unlocked position. When the locking mechanism is disengaged from the electric unlocking device 200 or when the electric unlocking device 200 is closed, it loses its magnetic force, the lock cylinder 150 is pushed back by the spring 180, and the positioning shaft 162 is reset to the highest point of the inclined groove 172'.

[0040] The controller 240 in the electric unlocking device 200 sets the motor 230 to rotate forward to unlock, and can also rotate backward to assist the lock cylinder 150 of the anti-theft tag 100 in resetting.

Claims

1. An anti-theft tag, comprising a housing consisting of a top cover and a bottom cover, wherein an anti-theft pin locking mechanism is provided between the top cover and the bottom cover, the anti-theft pin is inserted into the housing from the top cover and locked in place by the locking mechanism, and unlocked by an electric unlocking device, characterized in that: The locking mechanism is fixed between the upper and lower positioning seats inside the housing, and includes: A lock cylinder with a central through hole and three locking bead embedding parts evenly distributed around the upper part of the lock cylinder. The locking bead embedding parts have non-magnetic locking beads inside, and the outer side has a lock cylinder step part that is narrower at the top and wider at the bottom. A conical steel bowl is fixed inside the upper positioning seat and fastened to the upper part of the lock cylinder. The locking ball is limited by the conical surface of the inner wall of the steel bowl. A pressure block has a central through hole and positioning shafts on both sides. It is fitted around the outside of the lock cylinder from top to bottom. The inner side of the central through hole of the pressure block has a pressure block step that is narrower at the top and wider at the bottom. The lock cylinder step and the pressure block step limit each other. During assembly, the positioning shaft is stuck in the positioning groove of the upper or lower positioning seat, so that the pressure block can only move up and down along the positioning groove and cannot rotate circumferentially. A rotating inclined pressing component is provided with a central through hole, a fixed annular rotor is embedded in the upper part, and two symmetrical inclined grooves are provided in the lower part. It is fitted around the outside of the pressing block from top to bottom, and the positioning shaft is embedded in the inclined groove, so that the rotating inclined pressing component can only rotate under the mutual restriction of the positioning shaft and the space in the inclined groove. A spring is located at the bottom of the lock cylinder. The lower end of the spring abuts against the upper surface inside the lower positioning seat, and the upper end of the spring lifts the lock cylinder, forcing the locking ball on the lock cylinder to be pressed inward by the inner wall of the steel cup to tighten the anti-theft pin. When the anti-theft pin is inserted, the locking ball clamps the anti-theft pin, and at the same time, the lock cylinder lifts the pressure block. Under the combined action of the gravity of the rotating inclined pressure component and the elastic force of the spring, the positioning shaft is always at the highest point of the inclined groove. The electric unlocking device corresponds to the locking mechanism. The unlocking device motor and the ring magnet are combined. When the electric unlocking device is started, the ring magnet inside the electric unlocking device rotates circumferentially, driving the ring rotor and the rotating inclined pressure member inside the locking mechanism to rotate in the same direction. Since the rotating inclined pressure member is limited by the positioning shaft, the positioning shaft moves relative to the lowest point of the inclined groove during rotation, driving the rotating inclined pressure member to move upward to abut against the upper positioning seat, and then pressing the pressure block to drive the lock cylinder to move downward to compress the spring. When the positioning shaft moves to the lowest point of the inclined groove, the lock cylinder moves downward to the unlock position. When the locking mechanism is disengaged from the electric unlocking device or the electric unlocking device is closed, it loses its magnetic force, the lock cylinder is pushed back by the spring, and the positioning shaft is reset to the highest point of the inclined groove.

2. The anti-theft tag according to claim 1, characterized in that: The highest point of the inclined groove is provided with a limiting groove so that the positioning shaft cannot disengage from the highest point of the inclined groove when the external magnetic force does not meet the set strength.

3. The anti-theft tag according to claim 1 or 2, characterized in that: The annular rotor is an iron annular rotor composed of one or more iron beads, iron blocks, iron pillars, or iron sheets, or a magnetic ring consisting of one or more magnetic beads, magnetic blocks, magnetic pillars, magnetic sheets, split magnetic rings with N and N poles, integral magnetic rings, multi-pole magnetic rings, multiple magnetic rings, or magnetic rings magnetized in different directions, fixed on a rotating inclined pressure member.

4. The anti-theft tag according to claim 1 or 2, characterized in that: The bottom shell of the anti-theft tag and the top cover of the electric unlocking device are provided with corresponding protrusions and grooves. Only when the protrusions and grooves are engaged can the circumferential rotation of the annular magnet inside the electric unlocking device drive the annular rotor inside the anti-theft tag to rotate in the same direction to unlock it.

5. The anti-theft tag according to any one of claims 1 or 2, characterized in that: The anti-theft tag contains AM and RF coils.

6. An electric unlocking device for unlocking an anti-theft tag according to any one of claims 1 to 5, wherein the unlocking device corresponds to the locking mechanism of the anti-theft tag, characterized in that: The electric unlocking device includes a top cover, an annular magnet, a motor, and a controller. The controller controls the motor to start. The bottom shell of the anti-theft tag and the top cover of the unlocking device have corresponding protrusions and grooves. When the protrusions and grooves are engaged, the anti-theft tag and the unlocking device rotate relative to each other. At the same time, the annular magnet inside the unlocking device drives the annular rotor inside the anti-theft tag to rotate in the same direction to unlock the device.

7. The electric unlocking device according to claim 6, characterized in that: The unlocking device has a concave or convex surface on its top cover that matches the shape of the bottom shell of the anti-theft tag. The concave / convex surface and the bottom shell of the anti-theft tag have corresponding protrusions or grooves. Only when the protrusions and grooves are engaged can the circumferential rotation of the annular magnet inside the electric unlocking device drive the annular rotor inside the anti-theft tag to rotate in the same direction. The rotating inclined pressing part inside the anti-theft tag rotates and unlocks the device in accordance with the annular magnet of the electric unlocking device.

8. The electric unlocking device according to claim 7, characterized in that: The controller includes a pressure switch that extends from the center of the concave surface. When the bottom shell of the anti-theft tag engages with the corresponding protrusions and grooves on the top cover of the unlocker, the pressure switch is triggered, controlling the motor to start.

9. The electric unlocking device according to claim 6, characterized in that: The ring-shaped magnet is fixed inside a magnet fixing component, which is connected to the drive shaft of the motor.

10. The electric unlocking device according to any one of claims 6 to 9, characterized in that: The ring magnet is a Helbeck array magnet.

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