TWI669438B - Electronic seal improvement - Google Patents

Abstract

The invention consists of a plug and a socket. The plug includes a conductor and a circuit board; the conductor has a first buckle, a through hole extending through the upper and lower holes, and a top cover of the closed hole; the circuit board is suspended from the hole, and is provided with an RFID chip and a matching upper cover Pointing and protruding the contact point below the bottom end of the hole, the RFID chip takes out the first and second legs, and the RFID chip passes through the first leg, the upper contact, the upper cover and the conductor to form a first far-field antenna loop. The bolt seat is equipped with an elastic device and an internal antenna, and has a socket for inserting a lower portion of the conductor, and a second buckle for positioning the first buckle, thereby controlling the elastic device to provide a pre-pressure to the internal antenna and the lower joint The electrical connection is made, the RFID chip is activated, the internal antenna forms a second far-field antenna loop, and the first far-field antenna loop is synchronously activated, and the first and second far-field antenna loops can be cut off when the upper cover is worn.

Description

Electronic seal improvement

The present invention is directed to the technical field in which a thief can completely cut off the electromagnetic wave output when the electronic seal is broken.

US 9508271 "Electronic bolt seal" patent for better reading distance, while configuring near field antenna (Near Field Aantenna) and far field antenna (Far Field Antenna), as shown in Figure 1, the patent circuit board 90 An upper contact 91, a lower contact 92, and an RFID chip 93 are provided. A trace 94 is bridged between the upper contact 91 and the RFID chip 93, and a U-shaped near field is disposed between the lower contact 92 and the RFID chip 93. The antenna 95 and the RFID chip 93 are bridged to the feeding portion of the near field antenna 95 for normally closing the near field antenna 95, electrically connecting the conductor at the upper contact 91, and electrically connecting the internal antenna of the socket to the lower contact 92. , can constitute the operation of the far-field antenna loop.

In the patent case, after the thief grinds the top end of the plug, the circuit board 90 cuts off the far-field antenna loop. However, the near-field antenna loop can still continuously emit electromagnetic waves, which may cause the customs identification host to misjudge.

The main content of the present invention is to provide an electronic seal which can overcome the missing of the US 9508271 case. When the thief grinds the top end of the plug and removes the electronic seal from the container, it can surely cut off all electromagnetic wave output, thus removing the US 9508271 case. The misjudgment of the continuous operation of the near field antenna loop.

A‧‧‧ plug

10‧‧‧Conductor

11‧‧‧ shaft

12‧‧‧ hat head

13‧‧‧ hole

13A‧‧‧ head hole

13B‧‧‧ Covering

13C‧‧‧Sink

14‧‧‧ collar

15‧‧‧Upper cover

16‧‧‧First buckle

17‧‧‧Insulation sleeve

20‧‧‧ boards

21‧‧‧ first side

22‧‧‧ second side

231‧‧‧ first hole

232‧‧‧second hole

233‧‧‧ third hole

24‧‧‧Contacts

25‧‧‧Contacts

26‧‧‧RFID chip

261‧‧‧ first foot

262‧‧‧second foot

271‧‧‧ first line

272‧‧‧Second line

273‧‧‧ impedance matching area

30‧‧‧Upper preloading department

31‧‧‧Insulation board

311‧‧‧ Linked Column

32‧‧‧First fastener

321, 322, 323 ‧ ‧ shrapnel

33‧‧‧Second buckle

331‧‧‧ Guide surface

332‧‧‧ slots

B‧‧‧ pedestal

41‧‧‧ first housing

42‧‧‧Second housing

43‧‧‧Shell

44‧‧‧ bottom cover

45‧‧‧ jack

50‧‧‧Flexible device

51‧‧‧ first unit

511‧‧‧ class holes

512‧‧‧ Slider

513 ‧ ‧ spring

52‧‧‧Second unit

521‧‧‧Reed

522‧‧‧guide hole

60‧‧‧Internal antenna

70‧‧‧Second buckle

71‧‧‧ Ring groove

72‧‧‧ buckle

C‧‧‧door bolt

C1‧‧‧Bolt hole

Conventional part:

90‧‧‧ boards

91‧‧‧Contacts

92‧‧‧Contacts

93‧‧‧RFID chip

94‧‧‧Metal routing

95‧‧‧ Near Field Antenna

Figure 1 is a schematic diagram of a circuit board of the US 9508271 patent.

Figure 2 is a schematic exploded view of the present invention.

Figures 3 and 4 are exploded views of the circuit board and the upper pre-compression portion of the present invention.

Figure 5 is a schematic cross-sectional view of a plug seat of the present invention.

Figure 6 is a schematic view showing the relative positions of the plug, the container door bolt and the bolt seat of the present invention.

Figure 7 is a schematic cross-sectional view of Figure 6.

Figure 8 is a schematic cross-sectional view showing the first and second snaps of the present invention after positioning.

Figure 9 is a schematic cross-sectional view of the present invention after the thief has polished the tip of the plug.

Referring to Figures 6 and 9, the electronic seal of the present invention is composed of a plug A and a bolt B. The plug A can be inserted into the bolt hole C1 and the bolt seat B of the container door bolt C from the top to the bottom. To lock the container for the customs identification host to determine whether the container is normally opened.

Referring to FIGS. 2-7, the plug A is mainly composed of a metal conductor 10, a circuit board 20 and an upper pre-compression portion 30; wherein the conductor 10 has a shaft 11 and a radial extension to the top of the shaft 11 The cap 12, an axially extending bore 13, and a collar 14 abutting the bottom end of the cap 12, the cap 12 is of sufficient diameter to abut the latch C, and the top edge of the bore 13 has a The larger diameter of the head hole 13A, the top edge 13A top edge has a larger diameter cover hole 13B, the bottom edge of the hole 13 is additionally provided with a larger inner diameter of the hole 13C, the cover hole 13B for a conductivity The upper cover 15 is closed, and the shaft 11 is recessed with a first buckle 16 on the outer peripheral ring of the lower portion, and an insulating sleeve 17 covering the collar 14 and the upper cover 15 is further disposed on the outer periphery of the upper portion of the conductor 10. The circuit board 20 is pre-stressed through the upper cover. The portion 30 is suspended from the hole 13 and has a first surface 21 and a second surface 22 opposite to each other, and a first hole 231 and a second hole 232 extending through the first surface 21 and the second surface 22 are further disposed. A plurality of third holes 233, the upper end of the circuit board 20 is further provided with an upper contact 24, and the bottom end is provided with a lower contact 25, and the RFID chip 26 is mounted on the first surface 21 of the circuit board 20. The RFID chip 26 has a positioning capability. The first leg 261 of the first hole 231 and the second leg 262 of the second hole 232, the first leg 261 and the second leg 262 of the RFID chip 26 maintain a normally open contact (Normal Open), The first surface 21 bridges the first trace 271 between the first leg 261 and the upper contact 23, and the second surface 22 bridges the second trace 272 between the lower contact 25 and the second leg 262. And an area-enhanced impedance matching area 273 is defined in the lower half of the second trace 272. The RFID chip 26 is connected to the feeding portion of the first trace 271 and the second trace 272. Line 271, second The wire 272 is non-conducting; the upper pre-pressing portion 30 is composed of an insulating plate 31, and the insulating plate 31 is provided with a connecting post 311 for mounting the third hole 233 of the circuit board 20, so that the insulating plate 31 is flat on the circuit board. The second surface 22, in turn, isolates the inside and outside of the second trace 272, so that the second trace 272 does not short-circuit with the conductor 10. Further, the insulating plate 31 is provided with a first fastener 32 that can be suspended from the head hole 13A, The second fastening portion 33 can enter and exit the cavities 13C; the first fastening member 32 is a fork-shaped elastic piece 321 , 322 , 323 extending downwardly from the bottom end of the joint hole 13A, and the upper contact point 24 abuts the upper cover 15 The bottom surface is such that the conductor 10 and the RFID chip 26 constitute a first far-field antenna loop that cannot output power, and at the same time, the lower contact 25 is downwardly protruded. Position of the cavities 13C; please cooperate with the figures 2, 3, 4, 8 and 9 to show that the second fastening portion 33 is radially protruded from the bottom end of the insulating plate 31, and has a downwardly tapered outer diameter guide. The lead surface 331 has a slot 332 extending through the upper and lower sides. The slot 332 is for the circuit board 20 to pass, so that the lower contact 25 slightly protrudes from the bottom surface of the second buckle portion 33, and the top outer diameter of the second buckle portion 33 is between Between the cavities 13C and the apertures of the apertures 13 and controlling the upper contacts 24 to electrically open the bottom surface of the upper cover 15, the lower portion of the second fastening portion 33 protrudes from the bottom end of the cavities 13C, and when the upper cover 15 is detached, it can pass through The first buckle portion 32 is released to urge the top of the second buckle portion 33 to slide upward along the cavities 13C, so that the insulating plate 31 and the circuit board 20 cannot be pulled out from the top end of the hole 13 and the lower joint 25 is crushed upward. a distance, thereby synchronously cutting off the second trace 272, the RFID wafer 26 and a second far-field antenna loop formed by the internal antenna 52 described later; the plug B is engaged by the first housing 41 and the second housing 42. Then, it is placed in a casing 43 and is closed by closing a bottom end of the casing 43 with a bottom cover 44. The socket B is provided at the upper portion with a socket 45 for inserting a lower portion of the conductor 10, and is further connected to the socket B. An elastic device 50 and an internal antenna 60 are disposed in the interior; the elastic device 50 is composed of a first unit 51 and a second unit 52. The first unit 51 includes a class hole 511, a slider 512 and a spring 513. The 511 series coaxially communicates directly under the insertion hole 45, and the slider 512 is slidable along the top dead center to the bottom dead center of the class hole 511. The spring 513 is attached to the bottom end of the slider 512 and the bottom end of the class hole 511. The inner antenna 60 is coupled to the top end and the outer circumference of the slider 512, and the second unit 52 is integrally formed with a reed 521, which is integrally formed with the first housing 41. The utility model is disposed between the upper portion of the slider 512 and the lower portion of the insertion hole 45, and has a guiding hole 522. When the insertion hole 45 is inserted into the lower portion of the conductor 10, the guiding hole 522 can be correspondingly connected to the lower connector 25 of the plug A. Pass and advance The second fastening portion 33 of the second fastening portion 33 can not pass through the guiding hole 522, and the reed 521 can be deformed to provide a negative pre-stressing pre-plug A; the socket B is further provided with a second buckle 70, and the second buckle The 70 series has a ring groove 71 extending radially outward of the insertion hole 45. The ring groove 71 is provided with a buckle 72, and when the bottom end of the plug A is inserted into the cargo bolt hole C1 and the socket 45 from the top to the bottom, The lower contact 25 urges the internal antenna 60 and the slider 512 to move downward by a predetermined stroke through the guide hole 522. Then, the first buckle 16 is positioned at the second buckle 70, and the electronic seal can be operated to lock the container door bolt. C, at this time, the first unit 51 can provide a positive pre-pressure to the internal antenna 60 and the lower contact 25 to electrically connect, so that the RFID chip 26 and the internal antenna 60 form a second far-field antenna loop, prompting the first and the first The two far field antenna loops can synchronously initiate the transmission and reception of the identification electromagnetic waves to provide automated management of the identification of the customs; in addition, the second unit 52 can apply to the plug A before the first buckle 16 is positioned at the second buckle 70. Negative preload; as shown in Figures 8 and 9, when the thief grinds the diameter of the cap 12 of the plug A to less than the bolt hole C1 with a grinder, The cover 15 will be disengaged, thereby interrupting the first far-field antenna loop. In addition, the grinder will generate high temperature during the destruction of the upper cover 15, which will damage the elasticity and shape of the first fastener 32, and the plug A in the second unit 52. Under the application of the negative preload, 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, thus eliminating the misjudgment problem of the US 9508271 patent, and then, The first far field antenna loop and the second far field antenna loop form an asymmetric antenna configuration, and the second far field antenna loop output power is controlled to be greater than the first far field antenna loop output power, so that when the conductor 10 is cut, The first far field antenna loop and the second far field antenna loop can also be cut off simultaneously.

Claims (10)

An electronic seal improvement comprising at least: a plug consisting of a conductor and a circuit board; the conductor having a hole with an opening facing downward, the top end of the hole is closed by the upper cover, and the lower part of the conductor is provided with a first buckle; The plate system is mounted on the hole, and is provided with an RFID chip, and is further provided with a contact point on the upper cover and a contact point under the bottom end of the protruding hole. The RFID chip receives the first leg and the second leg to pass the RFID chip. The first leg, the upper contact, the upper cover and the conductor form a first far-field antenna loop, and the second leg electrically connects the lower contact; and a socket, which is provided with an elastic device and an internal antenna, and has a lower portion for the conductor Inserting the jack, and further providing a second buckle for positioning the first buckle, according to which the elastic device can provide pre-pressure to the internal antenna and the lower contact electrical connection, and the RFID chip and the internal antenna are formed. The far field antenna loop synchronously activates the first far field antenna loop, and when the upper cover is detached, the first far field antenna loop and the second far field antenna loop can be simultaneously cut off. 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 second far field antenna loop power system is controlled to be greater than the first far field antenna loop power. In order to cut off the first far field antenna loop and the second far field antenna loop simultaneously when the conductor is cut. According to the electronic seal of claim 2, the first leg and the second leg of the RFID chip maintain a normally open contact. The electronic seal of claim 1, 2 or 3, wherein the elastic device is composed of a first unit and a second unit; when the first and second far field antenna loops are activated, The first unit is provided with the forward pre-pressure required for the electrical connection of the internal antenna and the lower contact, but when the upper cover is worn, the second unit can provide the negative pre-pressure required for the lower contact to be disengaged from the internal antenna. The electronic seal is improved according to claim 4, wherein the second unit is provided with a reed inside the plug seat, and the reed is located between the inner antenna and the lower side of the jack, and is provided with a guide hole. When a buckle and a second buckle are positioned, the guide hole can pass through the lower contact, but the bottom end of the conductor cannot pass, so that the bottom end of the conductor can push the deformation of the spring to provide a negative preload. The bottom end of the conductor. The electronic seal of claim 5 is improved by the first housing and the second housing, and then placed in a hollow housing and closed by a bottom cover to close the bottom end of the housing; The socket is provided with a socket for inserting the lower portion of the conductor at the upper portion, and the reed is integrally formed on the first housing. The electronic seal is improved according to claim 4, wherein the conductor is further provided with a hole having a larger inner diameter than the hole at the bottom edge of the hole; the circuit board is mounted on the hole through an insulating plate, and the bottom of the plate The second end portion is provided with a second buckle portion having a slot for the lower joint to pass from the top to the bottom, and when the upper joint abuts the upper cover, the second buckle portion is at the bottom end of the protruding cavities The position, but after the upper cover is detached, the second unit can provide a negative preload to the bottom end of the conductor so that the sink can limit the second buckle. The electronic seal is improved according to claim 1, 2 or 3, wherein the circuit board has a first trace between the first leg and the upper contact, and a second between the second leg and the lower contact. Traces. The electronic seal of claim 8, wherein the circuit board has a first surface and a second surface opposite to each other, and a first hole and a second hole extending through the first surface and the second surface are further spaced apart. The chip system is mounted on the first side, and the first leg is positioned in the first hole, The second leg is positioned on the second hole, the first surface is provided with a first trace between the first foot and the upper contact, and the second side is provided with a second walk between the lower contact and the second foot The circuit board is mounted on the hole through an insulating plate, and the insulating plate is disposed on the second side of the circuit board to isolate the second wire. According to the improvement of the electronic seal of claim 9, the conductor is provided with a head hole having a larger inner diameter than the hole at the top edge of the hole, and a cover hole having a larger inner diameter than the head hole is provided at the top edge of the head hole. The hole is closed by the upper cover; the circuit board is mounted on the through hole through an insulating plate, and the insulating plate is disposed on the second side of the circuit board to isolate the second wire, and the insulating plate is further installed The first fastener of the head hole is composed of at least one downwardly extending elastic piece, so that the bottom end of the elastic piece abuts against the bottom end of the joint hole, and the upper contact point drives the upper contact point to abut the upper cover.