Electric anti-theft label

Abstract

The present invention relates to an electric anti-theft tag. After a brushless motor is energized, a wound stator in the motor generates an electromagnetic field to drive a magnetic rotor inside the anti-theft tag to rotate and unlock. The locking mechanism comprises: a lock core, a conical steel bowl on the top of the lock core, an annular magnetic rotor fixed to the outer shell of the lock core, and a spring at the bottom of the lock core. When the electric unlocking device is triggered, after the brushless motor is energized, the wound stator in the motor generates a rotating electromagnetic field, which drives the annular magnetic rotor located at the center of the magnetic field to rotate circumferentially. Since the lock core cannot rotate circumferentially, the movement of the protrusion and the cam portion drives the lock core to move upward, and then compresses the cam to drive the lock core to move downward and compress the spring. When the protrusion moves to a position close to the wave crest, the lock core moves downward to the unlocking position against the lower positioning seat and unlocks. When the locking mechanism leaves the electric unlocking device or is turned off, the power and magnetism are lost, the lock core is reset by the spring, and the protrusion naturally slides to the wave trough of the cam portion, driving the annular magnetic rotor to reset.

Description

Technical Field

[0001] The invention relates to an anti-theft label, which is widely used for the anti-theft of goods in stores or supermarkets, and in particular to an electric anti-theft label. Background Art

[0002] Anti-theft tags are widely used in the marketplace. They are attached to merchandise for sale. If a merchandise passes through a mall exit without the tag being removed by a cashier, an alarm will sound, alerting security personnel. However, these tags typically lose their security after several years of use. Consequently, new products are constantly being developed.

[0003] Application No. 201711054179.9 provides a pin-locked anti-theft tag and its unlocking device. The pin-locked anti-theft tag comprises a housing, a lock cylinder disposed within the housing for locking the anti-theft pin, unlocked by a magnetic unlocking device, and a locking element for locking the anti-theft pin. The lock cylinder is also equipped with a lock element support device that cooperates with a rotating magnetic field. The lock element support device can convert rotational motion into lifting motion under the influence of the rotating magnetic field, thereby locking and unlocking multiple locking elements thereon. Due to the novel unlocking method, existing unlocking devices on the market cannot unlock the tag, thereby improving the product's anti-theft capability.

[0004] Utility model patent No. 201720795856.1 relates to an anti-theft device. The purpose is to provide an anti-theft tag with an improved structure, which should have two unlocking structures, and have a simple structure, easy to use, and reliable and stable performance. The technical solution is: a double-unlocking anti-theft tag, including a nail rod with a nail cap and a tag seat with a steel ball lock cylinder; a vertically slidable movable block is also positioned between the steel ball lock cylinder and the wall of the tag seat, one end of the movable block is placed on the top of the steel ball lock cylinder, and the pressure end of the movable block can be vertically slidably positioned in the slideway outside the steel ball lock cylinder; an unlocking track is provided in the tag seat, one end of the unlocking track extends to the pressure end of the movable block, and the other end of the unlocking track is connected to the unlocking port on the surface of the tag seat; there is also an unlocking rod that matches the cross-sectional shape of the unlocking port.

[0005] The applicant, in its invention patent number ZL20091004745.43, discloses a magnetic thrust anti-theft tag comprising a housing consisting of an upper cover and a base, with a coil alarm and an anti-theft nail locking mechanism disposed between the upper cover and the base. The anti-theft nail is inserted into the housing from the upper cover and positioned by the locking mechanism. The locking mechanism comprises: a locking bead cap with a trapezoidal cross-section, a locking bead retaining seat that matches the inner cavity of the locking bead cap, at least three locking beads, and a spring device that abuts the locking bead retaining seat. A magnetic unlocking device corresponds to the locking mechanism and is used to unlock the locking mechanism. The locking mechanism is equipped with a magnetic switch device. A magnet within the magnetic switch device is pushed away from the magnet by the magnet within the unlocking device, thereby pushing the locking mechanism to open. The locking mechanism is unlocked by magnetic thrust rather than conventional magnetic suction, providing a simple, easy-to-use, and secure form of anti-theft tag.

[0006] In addition, the applicant has improved the above-mentioned anti-theft structure and invented patent number 201320522186.8, 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 unlocker. The locking mechanism includes, from top to bottom, 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 against the locking bead fixing seat. Under the locking bead fixing seat, A limiting kit is provided, which is limited by the base. A through hole is provided inside the limiting kit, and a pair of radially symmetrical wing-shaped inverted inclined surfaces are provided on the outer periphery, which are flat on the top and converge downward. The protruding part of the bottom of the locking bead fixing seat is inserted above the through hole, and a spring is passed through the through hole. At least one steel ball is supported on the bottom surface of the limiting kit; 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, and loses support for the limiting kit, thereby achieving safe unlocking.

[0007] The applicant has been committed to the research and development and production of anti-theft tags for many years. Currently, all anti-theft tags on the market, including the applicant's previous anti-theft tag products, use an unlocking device composed of a combination of magnets to unlock. With the understanding of the magnetic unlocking mechanism and the easy purchase of magnets on the market, the original anti-theft effect of the anti-theft tags has been weakened through the combination.

[0008] For this reason, it is necessary to reform the unlocking structure of the anti-theft label. Summary of the Invention

[0009] In view of the above-mentioned defects, the present invention aims to provide an electric anti-theft tag. By improving the locking mechanism of the locking bead, the locking bead can be removed only by electric unlocking, thereby achieving safe unlocking of the locking mechanism.

[0010] The object of the present invention is achieved through the following technical solution: an electric anti-theft tag, including a housing composed of an upper cover and a bottom shell, an anti-theft nail locking mechanism is provided between the upper cover and the bottom shell, the anti-theft nail is inserted into the housing through the upper cover and locked in place by the locking mechanism, wherein: an electric unlocking device corresponds to the locking mechanism, and when a brushless motor is energized, the wound stator in the motor generates an electromagnetic field to drive the magnetic rotor inside the anti-theft tag to unlock, and the locking mechanism is fixed between the upper and lower positioning seats, and includes:

[0011] A lock core with a central through hole and three locking through holes evenly distributed circumferentially on the upper portion of the lock core, each of which has a built-in non-magnetic locking bead; a circumferential positioning portion and a cam portion having at least two or more identical crests and troughs are fixed to the outer side, and when assembled, the circumferential positioning portion is clamped in the positioning groove of the upper positioning seat or the lower positioning seat and is circumferentially fixed, so that the lock core cannot rotate circumferentially;

[0012] A conical steel bowl is fixed in the upper seat and buckled on the upper part of the lock core, and the locking bead is limited by the conical surface of the inner wall of the steel bowl;

[0013] An annular magnetic rotor is sleeved on the exterior of the lock core and contains an annular magnet or induction magnetized coil. Protrusions corresponding to the cam portion are evenly distributed on the rotor. The protrusions are embedded between the troughs of the cam portion. The lower positioning seat is provided with a limit step to limit the maximum downward displacement of the annular magnetic rotor. This prevents the annular magnetic rotor from pressing the troughs of the cam portion under the action of gravity or other downward external forces to move the lock core downward to the bottom unlocking position against the lower positioning seat.

[0014] A spring is provided at the bottom of the lock core, the lower end of the spring abuts against the upper surface of the lower positioning seat, and the upper end of the spring pushes up the lock core, forcing the locking bead on the lock core to be pressed inward by the inner wall of the steel bowl to tighten the anti-theft nail. When the anti-theft nail is inserted, the locking bead clamps the anti-theft nail;

[0015] When the electric unlocking device is triggered, the brushless motor is energized, and the wound stator in the motor generates a rotating electromagnetic field, which drives the annular magnetic rotor at the center of the magnetic field to rotate circumferentially. Since the lock core cannot rotate circumferentially, the protrusion moves from the trough to the peak of the cam, driving the annular magnetic rotor to move upward until it hits the limit ring at the bottom of the upper positioning seat, and then presses the cam to drive the lock core downward to compress the spring. When the protrusion moves close to the peak of the wave, the lock core moves down to the unlocking position at the bottom of the lower positioning seat.

[0016] When the locking mechanism leaves the electric unlocking device or the electric unlocking device is turned off, the power and magnetism are lost, the lock cylinder is pushed back by the spring, and the protrusion naturally slides to the trough of the cam part, driving the annular magnetic rotor to reset.

[0017] Since the anti-theft tag of the present invention must be unlocked electrically, the safety and reliability of the anti-theft tag are improved, and the cost of the unlocking device can also be reduced.

[0018] On the basis of the above scheme, the lower positioning seat is a claw-shaped structure with more than two openings facing upward and has a lock core movement limiting support column or limiting part inside. The claw shape buckles the bottom outer ring of the upper positioning seat, and there is a gap groove between each claw. The circumferential positioning buckle on the base below the lock core is stuck between the gap grooves, so that the lock core is positioned by the circumferential buckle; the top of the annular magnetic rotor is limited by the bottom of the upper positioning seat, and the bottom edge of the annular magnetic rotor is supported by the support column. The lock core is circumferentially positioned when rotating, and can only be pressed downward under the push of the protrusion at the bottom of the annular magnetic rotor. The distance the lock core moves downward is not greater than the height of the wave peak.

[0019] Furthermore, the lower positioning seat gap groove is provided with a beveled opening. When the annular magnetic rotor rotates and the bottom protrusion squeezes the lock core, the beveled opening presses the lock core positioning buckle downward, and the friction force is converted into squeezing power.

[0020] Based on the above solution, the upper positioning seat and the upper cover are made into an integrated structure, and / or the lower positioning seat and the bottom shell are made into an integrated structure, thereby reducing assembly costs and parts costs.

[0021] The inner wall of the upper positioning seat is provided with a flange. When the steel bowl is pushed into the upper positioning seat, the bottom edge of the steel bowl is clamped on the flange and is fixed in the upper positioning seat.

[0022] The lower positioning seat is provided with a spring seat for fixing the spring.

[0023] Based on the above scheme, the annular magnetic rotor is composed of a rotor fixing base and a structurally symmetrical magnet arranged in the rotor fixing base. The magnet is a magnetic bead, a magnetic block, a magnetic column, a magnetic sheet, a split magnetic ring with NS poles including multiple magnetic rings and semicircular magnetic rings, an integral magnetic ring, a multi-pole magnetic ring or a magnetic ring magnetized in different directions, which is fixed in the rotor fixing base.

[0024] Furthermore, the rotor fixing seat has an annular evenly distributed magnetic block or magnetic bead fixing groove, and multiple magnetic blocks, magnetic sheets, magnetic columns or magnetic beads are symmetrically fixed in the fixing groove; or, the fixing seat is provided with an annular groove, and a split magnetic ring or an integral magnetic ring with NS poles is directly placed in the annular groove.

[0025] Alternatively, the annular magnetic rotor is composed of a rotor fixing seat and an integral magnetic ring sleeved on the fixing seat, one end of the fixing seat fixes the integral magnetic ring, and the other end is fixed to a cam, and the cam is engaged with the protrusion of the circumferential positioning part.

[0026] The annular magnetic rotor described in the present invention can be matched with a synchronous motor, an asynchronous motor, a shaded pole motor, a disc motor, a transverse flux motor, or an axial flux motor, and can be used as a driving stator in an electric unlocking device to unlock the lock.

[0027] The present invention provides an electric unlocking device, which corresponds to the above-mentioned anti-theft tag structure. The electric unlocking device consists of a base, a ring-shaped motor stator coil distributed inside the base and electrically connected, and an upper cover with a concave annular surface in the center. A touch-type electric switch extends from the center of the annular concave surface. When the anti-theft tag is pressed on the concave surface, the switch is triggered and the motor starts. The magnetic field generated after the motor starts drives the annular magnetic rotor in the anti-theft tag to rotate and unlock; the type of motor in the electric unlocking device matches the annular magnetic rotor.

[0028] The beneficial effects of the present invention are as follows: the anti-theft tag cannot be opened by the magnet combination, and an electric unlocking mechanism must be adopted. Only the electric unlocking device matched with the present invention can drive the annular magnetic rotor to rotate, move the lock core downward, and loosen the anti-theft nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Example 1: Schematic diagram of an electric anti-theft tag;

[0030] Figure 2 Top view of magnetic ring rotor;

[0031] Figure 3 Schematic diagram of the lower positioning seat;

[0032] Figure 4 Exploded diagram of electric unlocking device;

[0033] Figure 5 Schematic diagram of the appearance of the electric lock opener after assembly;

[0034] Figure 6 Schematic diagram of the cross-sectional structure of the anti-theft tag in the locked state (magnetic ring in Example 1);

[0035] Figure 7 Schematic diagram of the second cross-sectional structure of the anti-theft tag in the locked state;

[0036] Figure 8 Schematic diagram of the anti-theft tag unlocking state;

[0037] Figure 9 Schematic diagram of the second unlocked state of the anti-theft tag;

[0038] Figure 10 Schematic diagram of the motor driving the rotor to rotate;

[0039] Figure 11 Top view of the magnetic rotor in Example 2;

[0040] Figure 12 Schematic diagram of the magnetic rotor decomposition of Example 2;

[0041] Figure 13 Example 3: Top view of the semicircular magnetic ring rotor;

[0042] Figure 14 - Schematic diagram of the magnetic bead rotor;

[0043] Figure 15 -Top view of magnetic bead rotor;

[0044] Figure 16 Example 5: Schematic diagram of an exploded electric anti-theft tag;

[0045] Figure 17 Schematic diagram of the driving principle of the motor stator 1 corresponding to the electric anti-theft tag in Example 5;

[0046] Figure 18 Schematic diagram of the driving principle of the motor stator 2 corresponding to the electric anti-theft tag in Example 5;

[0047] Description of the numbers in the figure:

[0048] 100, 100' - anti-theft tag;

[0049] 101 - anti-theft nails;

[0050] 102——Upper cover;

[0051] 103, 103' - upper positioning seat;

[0052] 1031——flange; 1032——bottom outer ring; 1033'——positioning groove;

[0053] 104 – Steel bowl;

[0054] 105——lock cylinder;

[0055] 1051——Center through hole; 1052——Locking bead embedding part;

[0056] 1053——Lock cylinder base;

[0057] 10531, 10531' - circumferential positioning portion; 10532, 10532' - inclined projection or cam;

[0058] 106 - locking bead assembly;

[0059] 107 - spring;

[0060] 108, 108' - lower positioning seat;

[0061] 1081 - Positioning claw; 1082 - Support column or limiting step; 1083 - Bevel mouth;

[0062] 109——bottom shell;

[0063] In Example 1,

[0064] 200——Annular magnetic rotor 1;

[0065] 201——rotor fixing seat; 2011——cam;

[0066] 202——Circular magnetic ring;

[0067] In Example 2,

[0068] 400——Ring magnetic rotor II;

[0069] 401——Rotor fixing seat;

[0070] 402, 403 - first and second magnetic blocks;

[0071] In Example 3,

[0072] 300 - Ring magnetic rotor three;

[0073] 301——rotor fixing seat; 4011——downward protrusion;

[0074] 302, 303 - first and second semicircular magnetic rings;

[0075] In Example 4,

[0076] 500 - Ring magnetic rotor four;

[0077] 501——rotor fixing seat; 5011——downward protrusion;

[0078] 502, 503——first and second magnetic beads;

[0079] In Example 5,

[0080] 900 - Ring Magnetic Rotor Five;

[0081] 901——Rotor fixing seat; 9011——Center through hole; 9012——Downward protruding shaft;

[0082] 902——Circular magnetic ring;

[0083] Electric lock opener

[0084] 600 – Electric lock opener;

[0085] 601——concave annular upper cover;

[0086] 602——Rubber ring;

[0087] 603——Motor stator coil assembly;

[0088] 6031——Motor stator coil group 1;

[0089] 6032——Motor stator coil group 2;

[0090] 604——base;

[0091] 700——switch;

[0092] 800——Power cord. DETAILED DESCRIPTION Example 1

[0093] like Figure 1 Example 1: Schematic diagram of electric anti-theft tag decomposition, Figure 2 Top view of magnetic ring rotor, Figure 3 Schematic diagram of the lower positioning seat, Figure 4 Schematic diagram of electric lock opener Figure 5 Schematic diagram of the appearance of the electric lock opener after assembly, Figure 6 Schematic diagram of the cross-section structure of the anti-theft tag in the locked state (magnetic ring in embodiment 1), Figure 7 Schematic diagram of the second cross-section structure of the anti-theft tag in the locked state, Figure 8 Anti-theft tag unlocking status diagram and Figure 9 The second diagram of the anti-theft tag unlocking state is as follows:

[0094] An electric anti-theft tag 100, such as Figure 1 As shown, the housing comprises an upper cover 102 and a bottom shell 109, an anti-theft nail locking mechanism is provided between the upper cover 102 and the bottom shell 109, the anti-theft nail 101 is inserted into the housing from the upper cover 102 and locked in place by the locking mechanism, the electric unlocking device 600 corresponds to the locking mechanism, and the locking mechanism is opened or locked by the electric unlocking device 600. In this embodiment, the locking mechanism is fixed between the upper and lower positioning seats 103 and 108, and includes:

[0095] A lock core 105 has a central through hole 1051, a locking bead embedding portion 1052 on the upper part of the lock core, and a built-in non-magnetic locking bead assembly 106; after the anti-theft nail 101 is inserted into the central through hole 1051, it can be placed in the locking bead assembly 106 composed of three locking beads in the locking bead embedding portion 1052 to lock or release; the base 1053 below the lock core 105 outside the locking bead embedding portion 1052 has a circumferential positioning portion 10531 (or called a circumferential positioning buckle) and a cam portion with two or more identical structures and at least one side of the inclined surface protrusion 10532 distributed along the upper surface of the outer edge. When assembled, the circumferential positioning buckle 10531 is stuck in the gap between the positioning claws 1081 of the lower positioning seat 108 and is fixed circumferentially, so that the lock core cannot rotate circumferentially. The structure of the lower positioning seat 108 is as shown in FIG. Figure 3 As shown;

[0096] A conical steel bowl 104 is fixed in the upper seat 103 and buckled on the upper part of the lock core 105. The locking bead assembly 106 is limited by the conical surface of the inner wall of the steel bowl 104 and pressed inward to clamp the anti-theft nail 101. In this embodiment, the locking bead assembly 106 is three non-magnetic steel balls of the same structure;

[0097] A ring-shaped magnetic rotor 200, such as Figure 2 As shown, the annular magnetic rotor 100 of this embodiment is sleeved on the outside of the lock core 105. It is composed of a rotor fixing base 201 and a magnetic ring 202 embedded in the rotor fixing base 201. The rotor fixing base 201 has a downward protrusion 2011, which is a bump corresponding to the peaks and valleys of the cam portion. The number of downward protrusions 2011 is the same as the number of inclined protrusions 10532 of the lock core. After the annular magnetic rotor 1000 is sleeved on the lock core 105, the downward protrusion 2011 on its bottom surface is embedded between the valleys of the inclined protrusions 10532.

[0098] A spring 107 is provided at the bottom of the lock core 105 and abuts against the upper surface of the lower positioning seat 108. The upper end of the spring pushes up the lock core 105, forcing the locking bead assembly 106 on the lock core 105 to be pressed inwardly against the anti-theft nail 101 by the inner wall of the steel bowl 104. When the anti-theft nail 101 is inserted, the locking bead assembly 106 clamps the anti-theft nail 101; the lock core 105 is pushed upward, so that the locking bead assembly 106 is pressed inwardly against the anti-theft nail 101 by the inner wall of the steel bowl 104;

[0099] The lower positioning seat 108 is as shown Figure 3 As shown, it is a claw-shaped structure surrounded by three positioning claws 1081 and opening upward. There is a supporting column 1082 or a limiting step inside the positioning claws 1081. The bottom of the gap between the positioning claws 1081 is provided with a bevel opening 1083, which serves as the bottom unlocking position; limiting the maximum downward displacement of the annular magnetic rotor 200, so that the annular magnetic rotor 200 cannot move the lock core downward to the bottom unlocking position against the lower positioning seat by compressing the trough of the cam portion under the action of gravity or other downward external forces;

[0100] In this embodiment, Figure 1 As shown, the inner wall of the upper positioning seat 103 has a flange 1031 . When the steel bowl 104 with the bottom outer ring 1032 is pushed into the upper positioning seat 103 , the bottom edge of the steel bowl 104 is stuck on the flange 1031 and is fixed in the upper positioning seat 103 .

[0101] When the anti-theft tag 100 is assembled, the positioning claws 1081 buckle the bottom outer ring 1032 of the upper positioning seat 103, and there is a gap between each positioning claw 1081. The bottom edge of the annular magnetic rotor 200 is supported by the support column 1082 or the step. The downward protrusion 2011 of the annular magnetic rotor 200 is at the bottom between the inclined protrusions 10532 of the lock core 105. The bottom of the lock core 105 is pushed upward by the spring 107, and the circumferential positioning buckle 10531 of the lock core is pressed down at the inclined mouth 1083 at the bottom of the gap between the positioning claws 1081, so that the lock core 105 is circumferentially buckled and positioned; the upper part of the annular magnetic rotor 200 is limited by the bottom of the upper positioning seat 103. When the annular magnetic rotor 200 rotates, the lock core 105 is circumferentially positioned, and can only be pressed down under the push of the protrusion at the bottom of the annular magnetic rotor 200. The distance the lock core moves downward is not greater than the height of the inclined protrusion, that is, the height of the wave peak.

[0102] An electric unlocking device 600 that cooperates with the anti-theft tag 100, such as Figure 4 and Figure 5 As shown, it consists of an annular base 604, a motor stator coil 603 distributed in the groove of the annular base 604, and an upper cover 603 with a concave arc surface in the center. The power cord 800 is led out from the bottom of the annular base 604, and the motor stator coil 603 is connected to the power cord 800 via a touch-type electric switch 700. The touch-type electric switch 700 extends from the center of the concave arc surface. When the anti-theft tag 100 is placed on the concave arc surface, the switch 400 triggers the motor to start, triggering the electric unlocking device 600. The rotating magnetic field generated by the motor stator coil 603 when the motor is energized drives the annular magnetic rotor to rotate 200 degrees in the circumferential direction. Figure 10 As shown, since the lock core 105 cannot rotate circumferentially, the protrusion moves from the trough of the cam portion to the peak, driving the annular magnetic rotor to move upward to the bottom limit ring of the upper positioning seat, and then compressing the cam to drive the lock core 105 to move downward to compress the spring 107. When the protrusion moves close to the peak, the lock core 105 moves downward to the unlocking position at the bottom of the lower positioning seat.

[0103] When the anti-theft tag 100 leaves the electric unlocking device 600 or is turned off, the power is lost and the magnetism is lost. The lock cylinder 105 is pushed back by the spring 107 and the protrusion naturally slides to the trough of the cam part, driving the annular magnetic rotor to reset. Figure 6 and 7 As shown, it is a schematic diagram of the cross-sectional structure of the anti-theft tag 100 at different angles. The anti-theft tag 100 is above the electric unlocking device 600, and its bottom has not yet touched the contact of the switch 700, that is, the anti-theft tag 100 is not unlocked above the electric unlocking device 600.

[0104] The unlocking status of the anti-theft tag 100 is as follows Figure 8 and 9As shown in the schematic diagram, the anti-theft tag 100 is placed on the electric unlocking device 600. The bottom of the anti-theft tag 100 touches the contact of the switch 700. The electric unlocking device 600 unlocks the anti-theft tag 100. The electromagnetic field generated by the motor stator coil 603 drives the annular magnetic rotor 200 to rotate. Figure 10 As shown, the downward protrusion 2011 of the rotor fixing seat 201 rotates at high speed along the inclined direction of the inclined protrusion 10532, the lock cylinder 105 is pressed down, and the locking bead assembly 106 releases the anti-theft nail 101; leave the electric unlocking device 600, or turn off the motor switch, as shown Figure 6 Or in the state shown in 7, the power and magnetism are lost, the lock core 105 is pushed back by the spring 107, and the locking bead assembly 106 is squeezed inward by the conical surface of the steel bowl to clamp the anti-theft nail 101.

[0105] When the anti-theft tag 100 is placed on the electric unlocking device 600, Figure 8 and 9 As shown in the figure, after the motor is started, a rotating magnetic field is generated on the electronic stator coil, and the magnetic field drives the rotor to rotate 200 degrees.

[0106] The motor can be a commercially available product, which can reduce the cost of the unlocking device compared to the unlocking device with a specially designed magnet combination structure.

[0107] The present invention adopts a motor to unlock, which needs to be connected to the mains electricity, preventing individuals from using a magnetic structure combination to unlock, thereby improving the anti-theft effect.

[0108] The upper positioning seat 103 and the upper cover 102 can be integrally formed to form a whole structure.

[0109] The lower positioning seat 108 and the bottom shell 109 are made into an integral structure.

[0110] This embodiment uses an electric unlocking device 600 driven by AC power through a power cord 800, corresponding to the above-mentioned anti-theft tag structure. The electric unlocking device 600 consists of a base 604, a ring-shaped motor stator coil 603 distributed in the base 604 and electrically connected, and a cover 601 with a concave annular surface in the center. A touch-type electric switch 700 extends from the center of the annular concave surface. When the anti-theft tag is pressed on the concave surface, the switch 700 is triggered and the motor starts. The magnetic field generated after the motor starts drives the annular magnetic rotor 200 in the anti-theft tag to rotate and unlock. The type of motor in the electric unlocking device 600 matches the annular magnetic rotor 200.

[0111] For an electric unlocking device using a disc motor, the center upper cover can be a flat surface, and the magnetic ring can be a multi-pole magnetic ring. Example 2

[0112] like Figure 12 This is a schematic diagram of the magnetic rotor decomposition of this embodiment and Figure 13The top view of the magnetic rotor in this embodiment is shown as follows:

[0113] The rest is the same as that of Example 1, except that the annular magnetic rotor 400 is sleeved on the lock core 105. The annular magnetic rotor 400 of this embodiment is composed of a rotor fixing base 401, and first and second magnetic blocks 402 and 403 symmetrically embedded in the rotor fixing base 401. The first and second magnetic blocks 402 and 403 form the N pole and S pole, respectively. The rotor fixing base 401 has a downward protrusion 4011. The number of the downward protrusions 3011 is the same as the number of the inclined protrusions 10532 of the lock core 105. After the annular magnetic rotor 400 is sleeved on the lock core 105, the downward protrusion 4011 on the lower surface of its bottom is embedded between the inclined protrusions 10532.

[0114] The unlocking method is the same as that of embodiment 1, except that the motor type in the electric unlocking device 600 matches the annular magnetic rotor 2 400. Example 3

[0115] like Figure 11 The electromagnetic rotor structure of Example 3 is shown in the assembly structure diagram of the NS pole semicircular magnetic ring.

[0116] The rest of the embodiment is the same as that of Example 1, except that the annular magnetic rotor 300 is mounted on the lock core 105. The annular magnetic rotor 300 of this embodiment comprises a rotor holder 301, and first and second semicircular magnetic rings 302 and 303 embedded in the rotor holder 301. The first and second semicircular magnetic rings 302 and 303 form the north and south poles. The rotor holder 301 has downward protrusions (not shown). The number of downward protrusions is the same as the number of inclined protrusions 10532 of the lock core 105. After the annular magnetic rotor 300 is mounted on the lock core 105, the downward protrusion on the bottom surface of the annular magnetic rotor 300 is embedded between the inclined protrusions 10532.

[0117] The unlocking method is the same as that of embodiment 1, except that the motor type in the electric unlocking device 600 matches the annular magnetic rotor 300. Example 4

[0118] like Figure 14 - Magnetic bead rotor decomposition diagram and Figure 15 -Top view of magnetic bead rotor:

[0119] The rest is the same as Example 1, except that the annular magnetic rotor 500 is sleeved on the lock core 105. The annular magnetic rotor 500 of this embodiment is composed of a rotor fixing base 501, and first and second magnetic beads 502 and 503 embedded in the rotor fixing base 501. The rotor fixing base 501 has downward protrusions 5011, and the number of downward protrusions 5011 is the same as the number of inclined protrusions 10532 of the lock core 105. After the annular magnetic rotor 500 is sleeved on the lock core 105, the downward protrusion 5011 on the lower surface of its bottom is embedded between the inclined protrusions 10532.

[0120] The unlocking method and principle are the same as those in Example 1, except that the motor type in the electric unlocking device 600 matches the annular magnetic rotor 4500. Example 5

[0121] like Figure 16 The exploded diagram of the electric anti-theft tag of this embodiment is shown as follows: the upper and lower positioning seats 103', 108', the lock core 105' structure, and the annular magnetic rotor 200' are different from those of the first embodiment.

[0122] An electric anti-theft tag 100', such as Figure 16 As shown, the housing comprises an upper cover 102 and a bottom shell 109. An anti-theft nail locking mechanism is provided between the upper cover 102 and the bottom shell 109. The anti-theft nail 101 is inserted into the housing from the upper cover 102 and locked in place by the locking mechanism. The electric unlocker corresponds to the locking mechanism and is used to open or lock the locking mechanism. In this embodiment, the locking mechanism is fixed between the upper and lower positioning seats 103' and 108'. The lock core 105' is assembled with the following components from top to bottom:

[0123] An upper positioning seat 103', compared with the structure of the upper positioning seat 103 in Example 1, has a flange 1031 on the inner side of the side wall and a bottom outer ring 1032 with the bottom of the side wall turned outward, but has positioning grooves 1033' evenly distributed on the side wall for securing the circumferential positioning portion 10531';

[0124] The circumferential positioning portion 10531' of this embodiment is a positioning ring, with a circumferential positioning buckle provided on the upper end, which is locked in the positioning groove 1033', and a downward protrusion on the lower end;

[0125] A conical steel bowl 104 is fixed in the upper seat 103', with its bottom edge resting on the flange 1031 and buckled onto the upper part of the lock core 105'. The locking ball assembly 106 is limited and pressed inward by the conical surface of the inner wall of the steel bowl. In this embodiment, the locking ball assembly 106 is three non-magnetic steel balls of the same structure;

[0126] A lock core 105' with a central through hole, a locking bead embedding portion 1052 is provided on the upper portion of the lock core 105', and a non-magnetic locking bead assembly 106 is built in; after the anti-theft nail 101 is inserted into the central through hole, it can be placed in the locking bead assembly 106 of the locking bead embedding portion 1052 to lock or release; the outer side of the lock core 105 has a circumferential positioning portion 10531', a cam 10532' with at least two or more identical crests and troughs in structure, and an annular magnetic rotor 5900 from top to bottom. The number of downward protrusions of the circumferential positioning portion 10531' of this embodiment corresponds to the number of crests and troughs of the cam 10532'; the cam 10532' The sleeve is fixed on the outside of the lock core 105', and the upper part is provided with two or more crests and valleys of the same structure, and the bottom is a wheel axle fixed on the inner ring wall of the annular magnetic rotor 5 200'; when assembled, the circumferential positioning buckle of the circumferential positioning portion 10531' is clamped in the positioning groove 1033' of the upper positioning seat 103', and the number of the positioning grooves 1033' is not less than that of the circumferential positioning buckle, or is the same; the downward protrusion is embedded in the valley of the cam 10532', so that the lock core cannot rotate circumferentially, such as Figure 16 As shown;

[0127] The annular magnetic rotor 5 900 is sleeved on the outside of the lock core 105' and includes a rotor fixing seat 901 and a circular magnetic ring 902. The rotor fixing seat 901 is provided with a central through hole 9011 and a downward protruding shaft 9012. The central through hole 9011 matches the outer diameter of the rim of the cam 10532'. The rim of the cam 10532' is inserted into the central through hole 9011 from above the rotor fixing seat 201', thereby fixing the annular magnetic rotor 5 900 and the cam portion as a whole. The circular magnetic ring 902 is fixed to the downward protruding shaft 9012.

[0128] The annular magnetic rotor is composed of a rotor fixing seat and an integral magnetic ring sleeved on the fixing seat. One end of the fixing seat fixes the integral magnetic ring and the other end is fixed to a cam. The cam is engaged with the protrusion of the circumferential positioning part.

[0129] The lower positioning seat 108 has the same or similar structure as that of embodiments 1 to 4, and includes at least a positioning claw 1081 and a support column or a limiting step 1082. The limiting step on the lower positioning seat limits the maximum downward displacement of the annular magnetic rotor, so that the annular magnetic rotor cannot, under the action of gravity or other downward external forces, press the trough of the cam portion to move the lock core downward to the bottom unlocking position against the lower positioning seat.

[0130] A spring 107 is provided at the bottom of the lock core 105'. The lower end of the spring 107 abuts against the upper surface of the lower positioning seat 108. The upper end of the spring 107 pushes up the lock core, forcing the locking bead assembly 106 on the lock core to be pressed inward by the inner wall of the steel bowl 104 to tighten the anti-theft nail 101. When the anti-theft nail 101 is inserted, the locking bead clamps the anti-theft nail 101;

[0131] The electric unlocking device 600 is the same as that of the embodiment 1. When the electric unlocking device 600 is triggered, the rotating magnetic field generated by the stator when the motor is energized is used to drive the annular magnetic rotor to rotate in five directions. The principle is as follows: Figure 10 As shown, since the lock core 105' cannot rotate circumferentially, the protrusion moves from the trough to the crest of the cam portion, driving the annular magnetic rotor 5 900 to move downward, driving the lock core to move downward and compress the spring until the lock core abuts against the limit portion of the lower positioning seat 108. When the protrusion moves close to the crest of the wave, the lock core 105' moves downward to the bottom unlocking position against the lower positioning seat 108.

[0132] When the locking mechanism leaves the electric unlocking device 600 or the electric unlocking device 600 is turned off, the anti-theft tag of this embodiment loses power and magnetism, the lock cylinder 105' is pushed back by the spring 107, and the protrusion naturally slides to the trough of the cam portion, driving the annular magnetic rotor 5 900 to reset.

[0133] The electric unlocking device can also be other stator structures, such as the driving principle diagram of the electric anti-theft tag corresponding to the motor stator 1, such as Figure 17 As shown; and the driving principle diagram of the electric anti-theft tag corresponding to the motor stator 2, as shown Figure 18 shown.

Claims

1. An electric anti-theft tag, comprising a housing consisting of an upper cover and a bottom shell, with an anti-theft nail locking mechanism provided between the upper cover and the bottom shell. The anti-theft nail is inserted into the housing through the upper cover and locked in place by the locking mechanism, characterized in that: The electric unlocking device corresponds to the locking mechanism. When the brushless motor is powered, the winding stator in the motor generates an electromagnetic field to drive the magnetic rotor inside the anti-theft tag to unlock. The locking mechanism is fixed between the upper and lower positioning seats and includes: A lock core with a central through hole and three locking through holes evenly distributed circumferentially on the upper portion of the lock core, each of which has a built-in non-magnetic locking bead; a circumferential positioning portion and a cam portion having at least two or more identical crests and troughs are fixed to the outer side, and when assembled, the circumferential positioning portion is clamped in the positioning groove of the upper positioning seat or the lower positioning seat and is circumferentially fixed, so that the lock core cannot rotate circumferentially; A conical steel bowl is fixed in the upper seat and buckled on the upper part of the lock core, and the locking bead is limited by the conical surface of the inner wall of the steel bowl; An annular magnetic rotor is sleeved on the exterior of the lock core and contains an annular magnet or induction magnetized coil. Protrusions corresponding to the cam portion are evenly distributed on the rotor. The protrusions are embedded between the troughs of the cam portion. The lower positioning seat is provided with a limit step to limit the maximum downward displacement of the annular magnetic rotor. This prevents the annular magnetic rotor from pressing the troughs of the cam portion under the action of gravity or other downward external forces to move the lock core downward to the bottom unlocking position against the lower positioning seat. A spring is provided at the bottom of the lock core, the lower end of the spring abuts against the upper surface of the lower positioning seat, and the upper end of the spring pushes up the lock core, forcing the locking bead on the lock core to be pressed inward by the inner wall of the steel bowl to tighten the anti-theft nail. When the anti-theft nail is inserted, the locking bead clamps the anti-theft nail; When the electric unlocking device is triggered, the brushless motor is energized, and the wound stator in the motor generates a rotating electromagnetic field, which drives the annular magnetic rotor at the center of the magnetic field to rotate circumferentially. Since the lock core cannot rotate circumferentially, the protrusion moves from the trough of the cam to the peak, driving the annular magnetic rotor to move upward to the limit part of the lower positioning seat, and then presses the cam to drive the lock core to move downward to compress the spring. When the protrusion moves close to the peak, the lock core moves down to the bottom unlocking position against the lower positioning seat. When the locking mechanism leaves the electric unlocking device or the electric unlocking device is turned off, the power and magnetism are lost, the lock cylinder is pushed back by the spring, and the protrusion naturally slides to the trough of the cam part, driving the annular magnetic rotor to reset.

2. The electric anti-theft tag according to claim 1, characterized in that: The lower positioning seat is a claw-shaped structure with more than two openings facing upward and has a lock core movement limiting support column or limiting part inside. The claw shape buckles the bottom outer ring of the upper positioning seat, and there is a gap groove between each claw. The circumferential positioning buckle on the base below the lock core is clamped between the gap grooves, so that the lock core is positioned by the circumferential buckle; the top of the annular magnetic rotor is limited by the bottom of the upper positioning seat, and the bottom edge of the annular magnetic rotor is supported by the support column. When rotating, the lock core is circumferentially positioned, and can only be pressed down under the push of the protrusion at the bottom of the annular magnetic rotor. The distance the lock core moves downward is not greater than the height of the wave peak.

3. The electric anti-theft tag according to claim 2, characterized in that: The lower positioning seat gap groove is provided with a beveled opening. When the annular magnetic rotor rotates and the bottom protrusion squeezes the lock core, the beveled opening presses the lock core positioning buckle downward, converting the friction force into squeezing power.

4. The electric anti-theft tag according to claim 1, characterized in that: The upper positioning seat and the upper cover are prepared into an integral structure, and / or the lower positioning seat and the bottom shell are prepared into an integral structure.

5. The electric anti-theft tag according to claim 1, characterized in that: The annular magnetic rotor is composed of a rotor fixing base and a structurally symmetrical magnet arranged in the rotor fixing base. The magnet is a magnetic bead, a magnetic block, a magnetic column, a magnetic sheet, a split magnetic ring with NS poles, an integral magnetic ring, a multi-pole magnetic ring, multiple magnetic rings or a magnetic ring magnetized in different directions, which is fixed in the rotor fixing base.

6. The electric anti-theft tag according to claim 5, characterized in that: The rotor fixing seat has an annular evenly distributed magnetic block or magnetic bead fixing groove, with a protrusion on the bottom surface, and the magnetic blocks or magnetic beads are symmetrically fixed in the fixing groove with a protrusion on the bottom surface; or, the fixing seat is provided with an annular groove, and a split magnetic ring or an integral magnetic ring with NS poles is directly placed in the annular groove.

7. The electric anti-theft tag according to claim 1, characterized in that: The annular magnetic rotor is composed of a rotor fixing seat and an integral magnetic ring sleeved on the fixing seat. One end of the fixing seat fixes the integral magnetic ring and the other end is fixed to a cam. The cam is engaged with the protrusion of the circumferential positioning part.

8. The electric anti-theft tag according to any one of claims 1 to 6, characterized in that: The locking mechanism is fixed between the upper and lower positioning seats and includes: A lock core with a central through hole, a locking bead embedding portion on the upper portion of the lock core, and a built-in non-magnetic locking bead assembly; after the anti-theft nail is inserted into the central through hole, the locking bead assembly composed of three locking beads placed in the locking bead embedding portion is locked and released; the base below the lock core has a circumferential positioning buckle and a cam portion with two or more identically structured inclined surface protrusions and at least one side of which is an inclined surface, which are distributed along the upper surface of the outer edge. When assembled, the circumferential positioning buckle is clamped in the gap between the positioning claws of the lower positioning seat and is circumferentially fixed, so that the lock core cannot rotate circumferentially. The structure of the lower positioning seat; A conical steel bowl is fixed in the upper seat and buckled on the upper part of the lock core. The locking bead assembly is limited by the conical surface of the inner wall of the steel bowl and pressed inward to clamp the anti-theft nail; An annular magnetic rotor is sleeved on the outside of the lock core. The rotor fixing seat has downward protrusions. The number of downward protrusions is the same as the number of inclined protrusions on the lock core. After the annular magnetic rotor is sleeved on the lock core, the downward protrusion on the bottom surface of the annular magnetic rotor is embedded between the troughs of the inclined protrusions. The lower positioning seat is a claw-shaped structure surrounded by three positioning claws and opening upward. There is a supporting column or a limiting step inside the positioning claws. The bottom of the gap between the positioning claws is provided with a bevel opening, which serves as the bottom unlocking position; limiting the maximum downward displacement of the annular magnetic rotor, so that the annular magnetic rotor cannot move the lock core downward to the bottom unlocking position against the lower positioning seat by compressing the trough of the cam part under the action of gravity or other downward external forces; The inner wall of the upper positioning seat has a flange. When the outer ring steel bowl at the bottom is pushed into the upper positioning seat, the bottom edge of the steel bowl is stuck on the flange and is fixed in the upper positioning seat. When the anti-theft tag is assembled, the positioning claws of the lower positioning seat buckle the bottom outer ring of the upper positioning seat, and the gaps between the positioning claws serve as positioning grooves. The bottom edge of the annular magnetic rotor is supported by a supporting column or a step, and the downward protrusion of the annular magnetic rotor is at the bottom between the inclined protrusions of the lock core. The bottom of the lock core is pushed upward by a spring, and the circumferential positioning buckle of the lock core is pressed down on the inclined mouth at the bottom of the gap of the positioning claws, so that the lock core is positioned by the circumferential buckle; the upper part of the annular magnetic rotor is limited by the bottom of the upper positioning seat. When the annular magnetic rotor rotates, the lock core is circumferentially positioned, and it can only be pressed down under the push of the protrusion at the bottom of the annular magnetic rotor. The distance the lock core moves downward is not greater than the height of the inclined protrusion, that is, the height of the wave crest.

9. The electric anti-theft tag according to any one of claims 1 to 4 or 7, characterized in that: The locking mechanism is fixed between the upper and lower positioning seats, and the lock core is assembled with the following components from top to bottom: An upper positioning seat, with a flange on the side wall, a bottom outer ring and a positioning groove, for clamping the circumferential positioning part; The circumferential positioning portion is a positioning ring, with a circumferential positioning buckle at the upper end, which is stuck in the positioning groove, and a downward protrusion at the lower end; A conical steel bowl is fixed in the upper seat, with its bottom edge resting on the flange and buckled on the upper part of the lock core. The locking bead assembly is limited by the conical surface of the inner wall of the steel bowl and pressed inward; The lock core is provided with a central through hole, and a locking bead embedding portion is provided on the upper part of the lock core, and a non-magnetic locking bead assembly is built in; after the anti-theft nail is inserted into the central through hole, it can be placed on the locking bead embedding portion to lock or release the lock; the outer side of the lock core is provided with a circumferential positioning portion, a cam with at least two or more crests and troughs of the same structure, and an annular magnetic rotor five from top to bottom, the number of downward protrusions of the circumferential positioning portion corresponds to the number of crests and troughs of the cam; the cam sleeve is fixed to the outer side of the lock core, and the upper part is provided with two or more crests and troughs of the same structure, and the bottom is an axle fixed to the inner ring wall of the annular magnetic rotor; when assembled, the circumferential positioning buckle of the circumferential positioning portion is clamped in the positioning groove of the upper positioning seat, and the number of positioning grooves is not less than or the same as the circumferential positioning buckle; the downward protrusion is embedded in the trough of the cam, so that the lock core cannot rotate circumferentially; In the annular magnetic rotor, the rotor fixing seat is provided with a central through hole and a downward convex shaft. The central through hole matches the outer diameter of the cam wheel ring. The cam wheel ring is inserted into the central through hole from above the rotor fixing seat, so that the annular magnetic rotor and the cam portion are fixed as one. The circular magnetic ring is fixed on the downward convex shaft. The lower positioning seat includes at least a positioning claw and a supporting column or a limiting step. Since the lower positioning seat is provided with a limiting step, the maximum downward displacement of the annular magnetic rotor is limited, so that the annular magnetic rotor cannot move the lock core downward to the bottom unlocking position against the lower positioning seat by compressing the trough of the cam portion under the action of gravity or other downward external forces; A spring is arranged at the bottom of the lock core, with its lower end abutting against the upper surface in the lower positioning seat and its upper end lifting the lock core.

10. The electric anti-theft tag according to claim 1, characterized in that: The electric unlocking device consists of a base, a motor stator coil arranged in a ring and electrically connected inside the base, a concave annular surface or a flat upper cover in the center, and a touch-type electric switch extending from the center of the annular concave surface. When the anti-theft tag is pressed on the concave surface, the switch is triggered and the motor starts. The magnetic field generated after the motor starts drives the annular magnetic rotor in the anti-theft tag to rotate and unlock; the motor type in the electric unlocking device matches the annular magnetic rotor.

Images