CN110826677A

CN110826677A - Improved electronic seal

Info

Publication number: CN110826677A
Application number: CN201810920818.3A
Authority: CN
Inventors: 陈志权
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-14
Filing date: 2018-08-14
Publication date: 2020-02-21
Anticipated expiration: 2038-08-14
Also published as: CN110826677B

Abstract

The invention discloses an improved electronic seal, which at least comprises a plug and a plug seat. The plug comprises a conductor and a circuit board; the conductor is provided with a first buckle, a containing hole penetrating through the upper part and the lower part, and an upper cover for sealing the top end of the containing hole; the circuit board is suspended in the containing hole and is provided with an RFID chip, an upper contact matched with the upper cover and a lower contact protruding out of the bottom end of the containing hole, the RFID chip is connected with a first pin and a second pin, and the RFID chip forms a first far-field antenna loop through the first pin, the upper contact, the upper cover and the conductor. The bolt seat is provided with an elastic device and an internal antenna, and is also provided with a jack for inserting the lower part of the conductor, and a second buckle for positioning the first buckle, so as to control the elastic device to provide pre-pressure for the internal antenna and the lower contact to be electrically connected, so as to start the RFID chip and the internal antenna to form a second far-field antenna loop, synchronously start the first far-field antenna loop, and cut off the first and the second far-field antenna loops when the upper cover is worn.

Description

Improved electronic seal

Technical Field

The invention relates to an improvement of an electronic seal, in particular to the technical field that a thief can completely cut off the output of electromagnetic waves when breaking the electronic seal.

Background

In order to obtain a better reading distance, the conventional U.S. Pat. No. 9508271 "Electronic book seal" is provided with a Near Field Antenna (Near Field Antenna) and a Far Field Antenna (Far Field Antenna), as shown in fig. 1, a circuit board 90 of the patent is provided with an upper contact 91, a lower contact 92 and an RFID chip 93, a trace 94 is bridged between the upper contact 91 and the RFID chip 93, a U-shaped Near Field Antenna 95 is provided between the lower contact 92 and the RFID chip 93, the RFID chip 93 is bridged to a feed portion of the Near Field Antenna 95 to normally close the starting Near Field Antenna 95, the upper contact 91 is electrically connected to a conductor, and the lower contact 92 is electrically connected to the Antenna inside the socket, so as to form the operation of the Far Field Antenna loop.

In this patent, after the thief grinds the plug tip, the circuit board 90 will cut off the far-field antenna loop, but the near-field antenna loop will still continuously emit electromagnetic waves, which may cause misjudgment of the customs identification host.

Disclosure of Invention

The present invention is directed to an improved electronic seal capable of overcoming the defect of the U.S. Pat. No. 9508271, which can surely cut off all electromagnetic wave outputs when a thief grinds the top end of a plug and unloads the electronic seal from a container, thereby eliminating the misjudgment problem of the continuous operation of the U.S. Pat. No. 9508271 near-field antenna loop.

Based on the above, the present invention mainly adopts the following technical means to achieve the above object.

An electronic seal improvement, comprising at least: the plug consists of a conductor and a circuit board; the conductor is provided with a containing hole with a downward opening, the top end of the containing hole is closed by an upper cover, and the lower part of the conductor is provided with a first buckle; the circuit board is arranged in the containing hole, the circuit board is provided with an RFID chip, an upper contact matched with the upper cover and a lower contact protruding out of the bottom end of the containing hole, the RFID chip is connected with a first pin and a second pin, the RFID chip forms a first far-field antenna loop through the first pin, the upper contact, the upper cover and the conductor, and the second pin is electrically connected with the lower contact; and the bolt seat is provided with an elastic device, an internal antenna, a jack for inserting the lower part of the conductor and a second buckle for positioning the first buckle, pre-pressure can be provided for the internal antenna and the lower connection point to be electrically connected by controlling the elastic device so as to start the RFID chip and the internal antenna to form a second far-field antenna loop, the first far-field antenna loop is started synchronously, and the first far-field antenna loop and the second far-field antenna loop can be cut off simultaneously when the upper cover is separated.

Furthermore, the first far-field antenna loop and the second far-field antenna loop form an asymmetric antenna configuration, and the power of the second far-field antenna loop is controlled to be larger than that of the first far-field antenna loop, so that when the conductor is cut off, the first far-field antenna loop and the second far-field antenna loop can be cut off simultaneously.

Further, the first pin and the second pin of the RFID chip keep normally open contacts.

Furthermore, the elastic device consists of a first unit and a second unit; when the first and second far-field antenna loops are started, the first unit is enabled to provide positive pre-pressure required by the electrical connection of the internal antenna and the lower contact, but when the upper cover is worn, the second unit is enabled to provide negative pre-pressure required by the lower contact to be separated from the internal antenna.

Furthermore, the second unit is provided with a reed inside the bolt seat, the reed is positioned between the upper part of the internal antenna and the lower part of the jack, and a guide hole is arranged in the second unit in a penetrating way, when the first buckle and the second buckle are positioned, the guide hole can be used for a lower connection point to pass through, but can not be used for the bottom end of the conductor to pass through, so that the bottom end of the conductor can push the reed to deform, and negative pre-pressure is provided for the bottom end of the conductor.

Furthermore, the bolt seat is formed by the involution of a first shell seat and a second shell seat, then the involution is placed into a hollow shell, and the bottom end of the shell is sealed by a bottom cover; the upper part of the bolt seat is provided with a jack for inserting the lower part of the conductor, and the reed is integrally formed on the first shell seat.

Furthermore, the bottom edge of the containing hole of the conductor is additionally provided with a sinking hole with an inner diameter larger than that of the containing hole; the circuit board is arranged in the accommodating hole through an insulating plate, a second buckling part is arranged at the bottom end of the insulating plate, the second buckling part is provided with a slot through which a lower contact can pass from top to bottom, when the upper contact abuts against the upper cover, the second buckling part is positioned at the position protruding out of the bottom end of the sinking hole, and after the upper cover is separated from the lower cover, the second unit can provide negative pre-pressure to the bottom end of the conductor, so that the sinking hole can limit the second buckling part.

Furthermore, the circuit board is bridged with a first wire between the first pin and the upper contact, and a second wire is arranged between the second pin and the lower contact.

The RFID chip is arranged on the first surface, so that the first pin is positioned in the first hole, the second pin is positioned in the second hole, a first routing is arranged between the first pin and the upper contact on the first surface, and a second routing is arranged between the lower contact and the second pin on the second surface; the circuit board is arranged in the accommodating hole through an insulating plate, and the insulating plate is assembled on the second surface of the circuit board and used for isolating the second routing.

Furthermore, the top edge of the hole of the conductor is provided with a head cavity with an inner diameter larger than that of the hole, and the top edge of the head cavity is provided with a cover cavity with an inner diameter larger than that of the head cavity, and the cover cavity is used for sealing the upper cover; the circuit board is arranged in the accommodating hole through an insulating plate, the insulating plate is assembled on the second surface of the circuit board and used for isolating the second wiring, the insulating plate is provided with a first fastener capable of being arranged in the head cavity, the first fastener at least comprises a downwardly extending elastic sheet, and the bottom end of the elastic sheet is abutted against the bottom end of the head cavity so as to drive the upper contact to abut against the upper cover.

By adopting the technical means, the plug and the socket are structurally designed, the plug can be sequentially inserted into the plug hole and the plug seat of the door bolt of the container from top to bottom to lock the container so as to be used for the customs identification host to judge whether the container is normally opened, when a thief destroys the plug to a certain extent by a grinder, the upper cover can be separated, and further the first far-field antenna loop is interrupted, in addition, high temperature can be generated in the process that the grinder destroys the upper cover, the circuit board is damaged, and under the condition that the elastic device exerts pre-pressure on the plug, the lower connection point cannot be electrically connected with the internal antenna of the plug seat, so that the second far-field antenna loop is completely cut off, and the problem of misjudgment of the US9508271 patent can be solved.

Drawings

Fig. 1 is a schematic diagram of a circuit board of the US9508271 patent.

FIG. 2 is an exploded view of the present invention.

Fig. 3 and 4 are exploded schematic views of the circuit board and the upper pre-pressing portion of the invention.

FIG. 5 is a cross-sectional view of the key seat of the present invention.

FIG. 6 is a schematic diagram showing the relative positions of the bolt, the container door bolt, and the bolt seat according to the present invention.

Fig. 7 is a schematic cross-sectional view of fig. 6.

FIG. 8 is a cross-sectional view of the first and second clips after being positioned.

FIG. 9 is a schematic assembled cross-sectional view of the present invention after a thief grinds the plug tip.

[ notation ] to show

A bolt

10 conductor 11 shaft

12 cap head and 13 containing holes

13A head Point 13B Cap Point

13C sink 14 collar

15 first buckle of upper cover 16

17 insulating sleeve

20 first side of circuit board 21

22 second face 231 first aperture

232 second hole 233 third hole

24 upper contact, 25 lower contact

26 RFID wafer 261 first leg

262 second leg 271 first trace

272 second trace 273 impedance matching region

30 upper prepressing part 31 insulation board

311 first fastener of connecting column 32

321. 322, 323 spring piece 33 second buckle part

331 guide surface 332 slot

B bolt seat

41 first housing seat 42 second housing seat

43 outer shell 44 bottom cover

45 jack

50 elastic means 51 first unit

511-step hole 512 sliding block

513 spring 52 second unit

521 spring 522 guide hole

60 internal antenna

70 second snap ring 71 ring groove

72 buckle ring

C door bolt C1 bolt hole

The practice is as follows:

90 circuit board 91 upper contact

92 lower contact 93RFID chip

Metal traces 94 95 near field antenna.

Detailed Description

Referring to fig. 6 and 9, the improved electronic seal of the present invention comprises a bolt a and a bolt seat B, wherein the bolt a can be inserted into a bolt hole C1 of a container bolt C and the bolt seat B from top to bottom in sequence to lock the container, so that the customs identification host can determine whether the container is normally opened.

Referring to fig. 2 to 7, the plug a is mainly composed of a metal conductor 10, a circuit board 20 and an upper pre-pressing portion 30; wherein;

the conductor 10 has a shaft 11, a cap 12 expanding outward in the top of the shaft 11 radially, a hole 13 running through axially, a lantern ring 14 abutting against the bottom of the cap 12, the diameter of the cap 12 is enough to abut against the keeper C, the top edge of the hole 13 has a head cavity 13A with larger diameter, the top edge of the head cavity 13A has a cover cavity 13B with larger diameter, the bottom edge of the hole 13 is provided with a sinking cavity 13C with larger inner diameter, the cover cavity 13B is used for sealing an upper cover 15 with conductivity, the shaft 11 is concave with a first buckle 16 on the lower peripheral ring, and the upper peripheral ring of the conductor 10 is provided with an insulating sleeve 17 for covering the lantern ring 14 and the upper cover 15;

the circuit board 20 is suspended in the accommodating hole 13 through the upper pre-pressing portion 30, and has a first surface 21 and a second surface 22 opposite to each other, and further has a first hole 231, a second hole 232 and a plurality of third holes 233 penetrating through the first surface 21 and the second surface 22, the top end of the circuit board 20 is further provided with an upper contact 24, the bottom end is provided with a lower contact 25, the first surface 21 of the circuit board 20 is further provided with an RFID chip 26, the RFID chip 26 has a first pin 261 capable of being positioned in the first hole 231 and a second pin 262 positioned in the second hole 232, the first pin 261 and the second pin 262 of the RFID chip 26 maintain a normally Open contact (Normal Open), the first surface 21 is bridged between the first pin 261 and the upper contact 23 with a first trace 271, the second surface 22 is bridged between the lower contact 25 and the second trace 262 with a second trace 272, and the second trace 272 has an impedance matching region 273 with an enlarged area, and the RFID chip 26 is bridged across the first trace 271, At the feeding portion of the second trace 272, the first trace 271 and the second trace 272 are not conducted with each other;

the upper pre-pressing portion 30 is composed of an insulating plate 31, the insulating plate 31 is provided with a connecting column 311 for installing the third hole 233 of the circuit board 20, the insulating plate 31 is flatly attached to the second surface 22 of the circuit board 20, and further the inside and the outside of the second trace 272 are isolated, so that the second trace 272 does not generate short circuit with the conductor 10, in addition, the insulating plate 31 is provided with a first fastener 32 capable of being suspended in the head cavity 13A, and a second fastening portion 33 capable of passing in and out of the sinking cavity 13C; the first buckle 32 extends downward to form two bifurcated elastic pieces 321, 322, 323 abutting against the bottom end of the head cavity 13A, so as to drive the upper contact 24 to abut against the bottom surface of the upper cover 15, so that the conductor 10, the upper cover 15, the upper contact 23, the first trace 271, the first pin 261 and the RFID chip 26 form a first far-field antenna loop which cannot output power, and at the same time, the lower contact 25 is located at a position protruding downward out of the cavity 13C; as shown in fig. 2, fig. 3, fig. 4, fig. 8 and fig. 9, the second buckle portion 33 is radially protruded from the bottom end of the insulating plate 31, the second buckle part 33 has a guide surface 331 with a downward tapered outer diameter, and has a slot 332 penetrating through the upper and lower parts, the slot 332 is used for the circuit board 20 to pass through, so that the lower contact 25 slightly protrudes from the bottom surface of the second buckle part 33, the outer diameter of the top of the second buckle portion 33 is between the hole 13C and the aperture of the receiving hole 13, and controls the upper contact 24 to electrically connect the bottom of the upper cover 15, the lower part of the second buckle part 33 protrudes out of the bottom end of the sinking hole 13C, and when the upper cover 15 is separated, it can release the first buckle part 32 to actuate the top of the second buckle part 33 to slide upwards along the sinking hole 13C, so that the insulation board 31 and the circuit board 20 can not be drawn out from the top of the containing hole 13, and further the lower contact 25 is driven to collapse upwards for a certain distance, thereby cutting off the second far-field antenna loop formed by the second trace 272, the RFID chip 26 and the internal antenna 60;

the bolt seat B is formed by the involution of a first shell seat 41 and a second shell seat 42, then is arranged in a shell 43, and the bottom end of the shell 43 is sealed by a bottom cover 44; the upper part of the bolt seat B is provided with a jack 45 for inserting the lower part of the conductor 10, and the interior of the bolt seat B is provided with an elastic device 50 and an internal antenna 60; the elastic device 50 is composed of a first unit 51 and a second unit 52, wherein the first unit 51 includes a step hole 511, a slider 512 and a spring 513, the step hole 511 is coaxially connected to the right lower portion of the insertion hole 45, the sliding block 512 can slide along the step hole 511 from the top dead center to the bottom dead center, the spring 513 is installed between the bottom end of the sliding block 512 and the bottom end of the step hole 511 to push the sliding block 512 to be positioned at the top dead center, the internal antenna 60 is combined with the top end and the periphery of the sliding block 512, and the second unit 52 is integrally formed with a spring plate 521 on the first housing base 41, the spring plate 521 is obliquely arranged between the upper part of the sliding block 512 and the lower part of the insertion hole 45, and a guide hole 522 penetrates through, when the lower part of the conductor 10 is inserted into the insertion hole 45, the guide hole 522 is made to pass through the lower contact 25 of the plug A, and further controls the guiding surface 331 of the second buckling part 33 not to pass through the guiding hole 522, so that the spring plate 521 can be deformed to provide negative pre-pressure to the plug A;

the bolt seat B is further provided with a second buckle 70, the second buckle 70 is provided with a ring groove 71 radially expanded outside the jack 45, the ring groove 71 is provided with a retaining ring 72, when the bottom end of the bolt A is sequentially inserted into the bolt hole C1 and the jack 45 from top to bottom, the lower contact 25 is enabled to force the internal antenna 60 and the slide block 512 to move downwards for a preset stroke through the guide hole 522, then the first buckle 16 is enabled to be positioned at the second buckle 70, the electronic seal can be operated to lock the door bolt C of the container, at the moment, the first unit 51 can provide a positive pre-pressure for the electrical connection between the internal antenna 60 and the lower contact 25, the RFID chip 26 and the internal antenna 60 form a second far-field antenna loop, and the first far-field antenna loop and the second far-field antenna loop can be enabled to synchronously start receiving and transmitting identification electromagnetic waves so as to provide automatic management for the; furthermore, before first catch 16 is positioned in second catch 70, the aforesaid second unit 52 can exert a negative pre-pressure on plug a;

as shown in fig. 8 and 9, when a thief grinds the cap head 12 of the plug a to be smaller than the plug hole C1 with a grinder, the upper cover 15 is separated, further, the first far-field antenna loop is interrupted, and high temperature is generated during the process of damaging the upper cover 15 by the grinder, which damages the elasticity and shape of the first fastener 32, under negative pre-stress applied by the second unit 52 to the plug a, it is ensured that the lower contact 25 cannot be electrically connected to the internal antenna 60 of the socket B, thereby completely cutting off the second far-field antenna loop, so as to eliminate the misjudgment problem of the US9508271 patent, and further, the first far-field antenna loop and the second far-field antenna loop form an asymmetric antenna configuration, and the output power of the second far-field antenna loop is controlled to be larger than that of the first far-field antenna loop, so that the first far-field antenna loop and the second far-field antenna loop can be cut off simultaneously even when the conductor 10 is cut off.

Claims

1. An improved electronic seal, comprising:

the plug consists of a conductor and a circuit board; the conductor is provided with a containing hole with a downward opening, the top end of the containing hole is closed by an upper cover, and the lower part of the conductor is provided with a first buckle; the circuit board is arranged in the containing hole, the circuit board is provided with an RFID chip, an upper contact matched with the upper cover and a lower contact protruding out of the bottom end of the containing hole, the RFID chip is connected with a first pin and a second pin, the RFID chip forms a first far-field antenna loop through the first pin, the upper contact, the upper cover and the conductor, and the second pin is electrically connected with the lower contact; and

the bolt seat is provided with an elastic device, an internal antenna, a jack for inserting the lower part of the conductor and a second buckle for positioning the first buckle, pre-pressure can be provided for the internal antenna and the lower connection point to be electrically connected by controlling the elastic device so as to start the RFID chip and the internal antenna to form a second far-field antenna loop, the first far-field antenna loop is started synchronously, and the first far-field antenna loop and the second far-field antenna loop can be cut off simultaneously when the upper cover is separated.

2. The electronic seal improvement according to claim 1, wherein: the first far-field antenna loop and the second far-field antenna loop form an asymmetric antenna configuration, and the power of the second far-field antenna loop is controlled to be larger than that of the first far-field antenna loop, so that the first far-field antenna loop and the second far-field antenna loop can be cut off simultaneously when the conductor is cut off.

3. The electronic seal improvement according to claim 2, wherein: the first pin and the second pin of the RFID chip keep normally open contacts.

4. The improvement of the electronic seal according to any one of claims 1 to 3, characterized in that: the elastic device consists of a first unit and a second unit; when the first and second far-field antenna loops are started, the first unit is enabled to provide positive pre-pressure required by the electrical connection of the internal antenna and the lower contact, but when the upper cover is worn, the second unit is enabled to provide negative pre-pressure required by the lower contact to be separated from the internal antenna.

5. The electronic seal improvement according to claim 4, wherein: the second unit is provided with a reed inside the bolt seat, the reed is positioned between the upper part of the internal antenna and the lower part of the jack and is penetrated with a guide hole, when the first buckle and the second buckle are positioned, the guide hole can be used for a lower connection point to pass through but can not be used for the bottom end of the conductor to pass through, so that the bottom end of the conductor can push the reed to deform, and negative pre-pressure is provided for the bottom end of the conductor.

6. The electronic seal improvement according to claim 5, wherein: the bolt seat is formed by the involution of a first shell seat and a second shell seat, then the involution is placed into a hollow shell, and the bottom end of the shell is sealed by a bottom cover; the upper part of the bolt seat is provided with a jack for inserting the lower part of the conductor, and the reed is integrally formed on the first shell seat.

7. The electronic seal improvement according to claim 4, wherein: the conductor is additionally provided with a sinking hole with an inner diameter larger than that of the containing hole at the bottom edge of the containing hole; the circuit board is arranged in the accommodating hole through an insulating plate, a second buckling part is arranged at the bottom end of the insulating plate, the second buckling part is provided with a slot through which a lower contact can pass from top to bottom, when the upper contact abuts against the upper cover, the second buckling part is positioned at the position protruding out of the bottom end of the sinking hole, and after the upper cover is separated from the lower cover, the second unit can provide negative pre-pressure to the bottom end of the conductor, so that the sinking hole can limit the second buckling part.

8. The improvement of the electronic seal according to any one of claims 1 to 3, characterized in that: the circuit board is bridged with a first wire between the first pin and the upper contact, and a second wire is arranged between the second pin and the lower contact.

9. The electronic seal improvement according to claim 8, wherein: the circuit board is provided with a first surface and a second surface which are opposite to each other, and a first hole and a second hole which penetrate through the first surface and the second surface are arranged at intervals; the circuit board is arranged in the accommodating hole through an insulating plate, and the insulating plate is assembled on the second surface of the circuit board and used for isolating the second routing.

10. The electronic seal improvement according to claim 9, wherein: the top edge of the hole is provided with a head cavity with an inner diameter larger than that of the hole, and the top edge of the head cavity is provided with a cover cavity with an inner diameter larger than that of the head cavity, and the cover cavity is used for sealing the upper cover; the circuit board is arranged in the accommodating hole through an insulating plate, the insulating plate is assembled on the second surface of the circuit board and used for isolating the second wiring, the insulating plate is provided with a first fastener capable of being arranged in the head cavity, the first fastener at least comprises a downwardly extending elastic sheet, and the bottom end of the elastic sheet is abutted against the bottom end of the head cavity so as to drive the upper contact to abut against the upper cover.