Tamper-evident electronic lead seal

Abstract

The application provides a tamper-proof electronic lead seal, which comprises a shell, a lead seal rope and a lead seal label, the lead seal label comprises a chip, an antenna circuit and a power supply and a power switch and a potential detection circuit, the power supply is arranged on a circuit electrically connected with the chip, the potential detection circuit is electrically connected with the antenna circuit and the chip, fixing holes and locking holes are arranged in the shell corresponding to the potential detection circuit and the power switch, the fixed end of the lead seal rope is clamped in the shell through the fixing holes, and the locking end is fixedly connected with the shell and closes the power switch when passing through the locking holes, when the lead seal rope is cut, the fixed end of the lead seal rope is released to cause the hook blade at one end of the compression spring to damage the potential detection circuit, so that different potential detection circuit on-off and power switch on-off combinations are generated in the three states of the electronic lead seal, irreversible physical change marks in the electronic lead seal are formed, and then the use state of the electronic lead seal can be accurately marked, and the electronic lead seal can be prevented from being tampered with or recycled.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of RFID electronic seals, in particular to an anti-tampering electronic seal. BACKGROUND

[0002] The existing RFID electronic seal needs to rely on the RFID tag to identify whether it has been used in combination with the appearance of the seal, that is, to judge by the number of times the RFID tag is read in combination with the appearance of the seal on the appearance state of "not used", "locked in use" and "already removed". In the use process of the seal, it must be ensured that it has been read more than once by the RFID reader each time. If the operator does not comply with the use process to read, it is easy to cause the current marking state of the seal to be inconsistent with the actual state, so it is easy to be artificially tampered with or counterfeited by taking advantage of this point, resulting in a low safety factor of the seal, and it is difficult to avoid cheating behavior in the logistics transportation system and cause economic losses such as loss of protected goods. SUMMARY

[0003] The technical problem to be solved by the present application is to provide an anti-tampering electronic seal that can accurately mark the actual state of the seal, prevent tampering and reuse, and improve the safety performance of the electronic seal.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is:

[0005] An anti-tampering electronic seal, comprising a shell, a seal rope and a seal tag arranged in the shell, the seal tag comprising a chip, an antenna circuit, a power supply, a power switch and a potential detection circuit;

[0006] The antenna circuit is electrically connected to the chip, the power supply is electrically connected to the chip through the power switch, and the two ends of the potential detection circuit are respectively electrically connected to the antenna circuit and the chip;

[0007] The potential detection circuit is provided with a fixing hole adjacent to it in the shell, and a locking hole is provided in the shell corresponding to the power switch, the fixed end of the seal rope passes through the fixing hole and is clamped in the shell, the locking end of the seal rope passes through the locking hole and is fixedly connected to the shell and closes the power switch, and when the middle part of the seal rope is disconnected, the end of the seal rope passing through the fixing hole moves to the potential detection circuit and disconnects the potential detection circuit.

[0008] The beneficial effects of the present application are that the RFID tag in the electronic lead seal adopts a semi-active electronic tag, and a potential detection circuit is arranged in the semi-active tag and a power supply switch is arranged in the power supply circuit, so that two actual use state "sensor switches" are formed through the power supply switch and the potential detection circuit in the semi-active tag, two-by-two physical state marks are generated through the on-off of the potential detection circuit and the on-off of the power supply switch, so that the lead seal tag has different irreversible physical change marks in the three states of not being locked, being locked, and being damaged or unlocked, and then the use state of the electronic lead seal can be accurately marked, the electronic lead seal is avoided from being tampered with or recycled and reused, and the supervision safety performance of the electronic lead seal is improved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 A circuit principle diagram of the tamper-proof electronic lead seal of the first embodiment of the present application;

[0010] Fig. 2 A lead seal tag structure schematic diagram of the tamper-proof electronic lead seal of the first embodiment of the present application;

[0011] Fig. 3 An internal structure schematic diagram of the tamper-proof electronic lead seal of the first embodiment of the present application.

[0012] REFERENCE NUMERALS:

[0013] 1, shell; 11, locking block; 111, fixing hole; 112, locking hole; 2, lead seal rope; 21, outer sheath; 22, inner rope; 23, compression spring; 24, hook blade; 3, lead seal tag; 31, chip; 32, antenna circuit; 33, power supply; 34, power supply switch; 341, insulating sheet; 342, power supply line; 35, potential detection circuit; 36, through hole. DETAILED DESCRIPTION

[0014] In order to explain the technical content, the purposes and effects of the present application in detail, the following will be described in combination with the embodiments and the accompanying drawings.

[0015] A tamper-proof electronic lead seal, comprising a shell, a lead seal rope and a lead seal tag arranged in the shell, the lead seal tag comprising a chip, an antenna circuit, a power supply, a power supply switch and a potential detection circuit;

[0016] The antenna circuit is electrically connected with the chip, the power supply is electrically connected with the chip through the power supply switch, and two ends of the potential detection circuit are respectively electrically connected with the antenna circuit and the chip;

[0017] The fixed hole is arranged adjacent to the potential detection line in the shell, and the locking hole is arranged at the position corresponding to the power switch in the shell, the fixed end of the lead seal rope is inserted into the shell through the fixed hole, the locking end of the lead seal rope is fixedly connected with the shell through the locking hole and closes the power switch, and the end of the lead seal rope passing through the fixed hole is moved to the potential detection line and breaks the potential detection line when the middle part of the lead seal rope is broken.

[0018] The working principle of the present application is as follows: when the electronic lead seal is not used, the power supply of the semi-active tag is not conducted with the chip and is in a passive mode (working mode state code 0x0000), when the electronic lead seal is used, the lead seal rope is wound around the monitored lock structure and inserted into the locking hole of the shell to be fixed, the lead seal rope passes through the locking hole and triggers the power switch to be closed, so that the power supply is conducted to supply power to the chip, and the tag is in a semi-active working mode (working mode state code 0x0003), at this time, the potential detection line of the electronic lead seal is in a perfect state (state code 0xB000). When the lead seal rope of the electronic lead seal is cut off to unlock the monitored object, the fixed end of the lead seal rope in the electronic lead seal is released to cause the hook knife at one end of the compression spring to damage the potential detection line, at this time, the chip will detect that the potential detection line is damaged (new state code 0xB0FF).

[0019] As can be seen from the above description, the present application has the beneficial effects that: the RFID tag in the electronic lead seal adopts a semi-active electronic tag, and a potential detection line is arranged in the semi-active tag and a power switch is arranged in the power supply line, so that two actual use state "sensor switches" are formed through the power switch and the potential detection line in the semi-active tag, two by two physical state marks are generated through the on-off of the potential detection line and the on-off of the power switch, so that the lead seal tag has different irreversible physical change marks in the three states of not being locked, being locked and being damaged or unlocked, and the use state of the electronic lead seal can be accurately marked, the electronic lead seal is prevented from being tampered with or recycled, and the safety performance of the electronic lead seal is improved.

[0020] Further, the lead seal rope comprises an outer sheath and an inner rope slidably arranged in the outer sheath, the outer sheath is clamped in the fixed hole, and the end of the inner rope extends into the shell through the fixed hole, the end of the inner rope extending into the shell is sleeved with a compression spring, the end of the compression spring away from the fixed hole is fixedly connected with the inner rope, the outer diameter of the compression spring is greater than the inner diameter of the fixed hole, and the inner rope drives the compression spring to be compressed when the locking end of the lead seal rope passes through the locking hole to be fixed.

[0021] From the above description, it can be seen that the lead seal rope is provided as a two-part structure of an outer sheath and an inner rope, the inner rope is inserted into the fixed hole, and the fixed end of the lead seal rope is fixed by connecting the compression spring clamped on the side of the fixed hole facing the inside of the shell. The inner rope can move in the outer sheath, so that when the locking end of the lead seal rope is inserted into the locking hole for fixation, the inner rope pulls outwards in the outer sheath, the end of the compression spring facing the fixed hole is pressed against the fixed hole, the other end of the compression spring is pulled by the inner rope and is compressed, and the compression spring is stored in a compressed state to store elastic potential energy in the locked state of the electronic lead seal. When the inner rope of the lead seal rope is broken, the elastic force of the compression spring in the original state rebounds the inner rope and the hook knife of the compression spring to the adjacent potential detection circuit, thereby damaging the potential detection circuit to generate an unlocking mark.

[0022] Preferably, the inner rope is made of a steel wire rope to avoid easy breakage of the lead seal rope, and the potential detection circuit is made of a fragile circuit to ensure that it will break under the impact of the spring and the inner rope.

[0023] Further, the lead seal tag is provided with through holes on both sides corresponding to the potential detection circuit, the end of the compression spring away from the fixed hole is provided with a hook knife, and one end of the hook knife passes through the through hole.

[0024] From the above description, the through holes provided on both sides of the potential detection circuit of the circuit board carried on the lead seal tag make the potential detection circuit thinner at the position, and when the lead seal rope is cut, the end of the compressed compression spring is provided with a cutting hook knife, so that the lead seal rope is more easily cut after being cut, and the potential detection circuit is ensured to be accurately marked in the actual physical state.

[0025] Further, the power switch includes an insulating sheet and a power line, one end of the power line is electrically connected to the chip, the other end of the power line is pressed against the positive or negative pole of the power supply on both sides of the insulating sheet, and one side of the insulating sheet is fixed on the shell and the middle part is located in the path through which the locking end of the lead seal rope passes.

[0026] From the above description, the power switch adopts an insulating sheet structure that blocks the conduction of two poles, and the insulating sheet is clamped between the power line connected to the chip and one pole of the power supply. When the insulating sheet is removed, the power supply and the power line are conductive to supply power to the chip, and the power switch is located adjacent to the path through which the locking end of the lead seal rope passes. One side of the insulating sheet extends through the path and is fixed on the shell on the other side of the path, so that when the lead seal rope passes through the locking hole of the locking end and hits the middle part of the insulating sheet, the insulating sheet clamped between the power line and one pole of the power supply is pulled out, thereby conducting the power supply and supplying power to the chip, so that the working state of the lead seal is switched from the original passive working state to the semi-active working state (the working state code is changed from 0x0000 to 0x0003).

[0027] Further, the power line is an elastic conductive sheet of a bending type or a compression spring type, one end of the elastic conductive sheet is electrically connected with the chip, and the other end is pressed against one side of the insulating sheet.

[0028] From the above description, the power line is set as an elastic conductive sheet, and the insulating sheet is reliably and stably turned on after being moved away by the elastic pressing, so that the working state code of the lead seal can be accurately recognized.

[0029] Further, a one-way locking mechanism is arranged in the locking hole, and the locking end of the lead seal rope passes through the one-way locking mechanism and is reversely locked and fixed.

[0030] From the above description, the one-way locking mechanism is arranged in the locking hole, and the locking end of the lead seal rope is fixed in the shell and cannot be withdrawn again through the one-way locking mechanism, so that the electronic lead seal can only be cut when being unlocked, thereby ensuring the safety performance of the electronic lead seal.

[0031] Further, the power source is a disposable battery.

[0032] From the above description, the power source is set as a disposable battery, preferably, a battery with low capacity and only meeting one use cycle is selected, thereby improving the anti-tampering performance of the electronic lead seal.

[0033] The electronic lead seal of the present application can be used for logistics or asset management, especially in long-distance transportation of valuable or important goods, the electronic lead seal of the present application can accurately mark the actual state through physical change, and the physical mark cannot be changed, thereby effectively playing the effects of anti-tampering and recycling, and the supervision safety performance of the electronic lead seal is high, thereby providing effective protection for the safety supervision of goods.

[0034] Please refer to Figs. 1 to 3 The embodiment one of the present application is:

[0035] A tamper-proof electronic lead seal comprises a shell 1, a lead seal rope 2 and a lead seal label 3, and the lead seal label 3 is arranged in the shell 1.

[0036] Among them, as Fig. 2As shown, the lead seal label 3 includes a chip 31, an antenna line 32, a power supply 33, a power switch 34, and a potential detection line 35. Chip 31 is a four-pin chip with two general-purpose input ports, specifically a first pin, a second pin, a third pin, and a fourth pin. Antenna line 32 is an ultra-high frequency antenna including a first arm and a second arm, with the port near the center electrically connected to the first and second pins of chip 31. Power supply 33 is a low-capacity disposable battery; the positive terminal of power supply 33 is connected to the third pin of chip 31 via a circuit, and the negative terminal of power supply 33 is connected to the first pin of chip 31 via power switch 34. The two ends of potential detection line 35 are connected to the fourth pin of chip 31 and the first arm of antenna line 32, respectively, with the fourth pin serving as the detection input pin.

[0037] like Fig. 3 As shown, the main circuit board of the lead seal label 3 is set in the square outer casing 1 by supporting ribs. The power supply 33 and the potential detection line 35 are located adjacent to each other on the side of the circuit board facing the top of the outer casing 1. A through hole 36 is opened on each side of the potential detection line 35 on the circuit board, making the potential detection line a thinner short line. A blocking block 11 is set near the top of the outer casing 1. The blocking block 11 has a fixing hole 111 and a locking hole 112 that pass through both ends of the outer casing 1. The fixing hole 111 is a stepped hole facing the potential detection line 35, and the inner diameter of the fixing hole 111 facing the middle of the outer casing 1 is smaller than the inner diameter facing the top of the outer casing 1. The two ends of the lead seal rope 2 are a fixing end and a locking end, respectively. Specifically, it includes an outer sheath 21 and an inner rope 22. The outer sheath 21 is sleeved on the inner rope 22, and the inner rope 22 can move in the outer sheath 21. The outer sheath 21 of the lead seal rope 2 is engaged in the fixing hole 111, and the inner rope 22 extends into the outer casing 1 through the fixing hole 111. A compression spring 23 is fitted onto the end of the inner rope 22 extending into the outer casing 1. A T-shaped block with a foot inserted into the compression spring 23 is connected to the end of the inner rope 22 near the end of the compression spring 23 facing away from the fixing hole 111 to press against the end of the compression spring 23. A hook 24 is provided at the end of the compression spring 23 near the potential detection line 35. One end of the hook 24 passes through a through hole 36 on the circuit board relatively close to the compression spring 23. The outer diameter of the compression spring 23 is larger than the inner diameter of the fixing hole 111 facing the center. A one-way locking mechanism (not shown in the figure) is provided in the locking hole 112. The locking end of the lead seal rope 2 passes through the one-way locking mechanism and is locked in the opposite direction, meaning that the locking end of the lead seal rope 2 cannot be withdrawn after passing through the locking hole 112. Preferably, the inner rope 22 is made of steel wire rope.

[0038] The power switch 34 includes an insulating sheet 341 and a power line 342, one end of the power line 342 is electrically connected with the chip 31, the other end of the power line 342 is pressed against the negative pole of the power supply 33 on both sides of the insulating sheet 341, that is, the insulating sheet 341 is clamped between the other end of the power line 342 and the negative pole of the power supply 33, cutting off the passage of the power line 342 and the power supply 33, and the power switch 34 is in an open state; when the insulating sheet 341 is removed, the power supply 33 is in conduction with the power line 342 to supply power to the chip 31, and the power switch 34 is in a permanently closed state. The power line 342 can be a flexible conductive copper sheet in a bending type / pressure spring type, which is pressed against the other side of the insulating sheet 341 through its elasticity to realize conduction by pressing against the negative pole of the power supply 33 after the insulating sheet 341 is removed, and the insulating sheet 341 can be an insulating plastic film. One side of the insulating sheet 341 is extended to the locking end of the lead seal rope 2 through the path, and the other side of the extended path is fixed on the shell 1, so that when the locking end of the lead seal rope 2 is fixed through the locking hole 112, the middle part of the insulating sheet 341 is top-charged to make the insulating sheet 341 clamped between the power line 342 and the negative pole of the power supply 33 be pulled out, so as to make the power supply 33 and the chip 31 in conduction, and the locking of the external structure of the lead seal triggers the change of the marking state of the internal label at the same time.

[0039] When the locking end of the lead seal rope 2 is inserted into the locking hole 112 for fixation, the inner rope 22 is pulled outwards in the outer sheath 21 to the outside of the shell 1, the compression spring 23 is pressed against the fixed hole 111 at one end thereof, the other end of the compression spring 23 is compressed by being pulled by the inner rope 22, and the inner rope 22 is kept in tension through the one-way locking mechanism, so as to keep the compression state to store elastic potential energy in the state of the electronic lead seal being locked. When the inner rope 22 of the lead seal rope 2 is disconnected, the elastic force of the compression spring 23 in the original state rebounds the inner rope 22 and the compression spring 23 to the adjacent potential detection line 35, and then the hook on the potential detection line 35 cuts off the thinner short line part of the potential detection line 35 to damage the potential detection line 35, thereby generating an unlocking mark. Preferably, the potential detection line 35 is a fragile line.

[0040] In summary, the electronic lead seal provided by the present application sets a semi-active electronic label including a potential detection line and a power switch in the electronic lead seal, and the lead seal rope structure of the electronic lead seal acts on the potential detection line and the power switch, the on-off of the potential detection line and the on-off of the power switch generate four physical state marks, so that the electronic lead seal has different irreversible physical change marks in the three states of being not locked, being locked and being damaged or unlocked, thereby being able to accurately mark the use state of the electronic lead seal, avoiding the electronic lead seal being tampered with or recycled, and improving the supervision safety performance of the electronic lead seal.

[0041] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A tamper-proof electronic lead seal, characterized in that, It includes a housing, a lead seal cord, and a lead seal label disposed in the housing. The lead seal label includes a chip, antenna circuitry, power supply, power switch, and potential detection circuitry. The antenna circuit is electrically connected to the chip, the power supply is electrically connected to the chip via a power switch, and the two ends of the potential detection circuit are electrically connected to the antenna circuit and the chip, respectively. A fixing hole is provided inside the housing adjacent to the potential detection line, and a locking hole is provided inside the housing corresponding to the power switch. The fixing end of the lead seal rope passes through the fixing hole and is locked inside the housing. When the locking end of the lead seal rope passes through the locking hole, it is fixedly connected to the housing and closes the power switch. When the middle of the lead seal rope is broken, the end of the lead seal rope passing through the fixing hole moves toward the potential detection line and disconnects the potential detection line.

2. The tamper-proof electronic seal according to claim 1, characterized in that, The lead seal rope includes an outer sheath and an inner rope slidably disposed in the outer sheath. The end of the outer sheath is engaged in the fixing hole and the end of the inner rope extends into the outer shell through the fixing hole. A compression spring is sleeved on the end of the inner rope extending into the outer shell. The end of the compression spring facing away from the fixing hole is fixedly connected to the inner rope. The outer diameter of the compression spring is larger than the inner diameter of the fixing hole. When the locking end of the lead seal rope passes through the locking hole and is fixed, the inner rope drives the compression spring to compress.

3. The tamper-proof electronic seal according to claim 2, characterized in that, The lead seal label has through holes on both sides corresponding to the potential detection line. The end of the compression spring away from the fixing hole is provided with a hook, and one end of the hook passes through the through hole of the detection line.

4. The tamper-proof electronic seal according to claim 1, characterized in that, The power switch includes an insulating sheet and a power cord. One end of the power cord is electrically connected to the chip, and the other end of the power cord is pressed against both sides of the insulating sheet with the positive or negative terminal of the power supply. One side of the insulating sheet is fixed to the outer casing, and the middle part is located in the path through which the locking end of the lead sealing rope passes.

5. The tamper-proof electronic seal according to claim 4, characterized in that, The power cord is a bent or spring-type elastic conductive sheet, one end of which is electrically connected to the chip and the other end is pressed against one side of the insulating sheet.

6. The tamper-proof electronic seal according to claim 1, characterized in that, The locking hole is equipped with a one-way locking mechanism, and the locking end of the lead seal rope passes through the one-way locking mechanism and is locked and fixed in the reverse direction.

7. The tamper-proof electronic lead seal according to claim 1, characterized in that, The power source is a disposable battery.

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