CN1830731A - Electronic seal - Google Patents

Abstract

The present invention is an electronic seal, involving two technologies, radio frequency identification and seal. It has a radio frequency identification chip and a matching antenna device, and the radio frequency identification chip and antenna device provide a radio frequency identification function during the period when the electronic seal seals a door, and stop providing the radio frequency identification function when the electronic seal is cut. Therefore, it is easy to determine whether the door has been invaded through the radio frequency identification function.

Description

Electronic seal

technical field

The invention relates to two technologies of radio frequency identification (RFID, Radio Frequency Identification) and seal.

Background technique

There are some things that need to remain untouched for a period of time, such as containers temporarily stored at customs. For this purpose, a mechanical seal with an identification code attached to the outside is currently used to seal the container.

This kind of mechanical seal requires a lot of manpower and time to be identified and managed according to the identification code.

In addition, the identification code is exposed, and some people with ulterior motives can copy the mechanical seal with the same identification code to replace the damaged original mechanical seal. Therefore, the security of this mechanical seal is very low.

Contents of the invention

The main purpose of the present invention is to provide an electronic seal, which has a radio frequency identification chip and a matching antenna device, and the radio frequency identification chip and antenna device provide a radio frequency during the electronic seal sealing an article identification function, and stop providing the radio frequency identification function when the electronic seal is cut. Therefore, the radio frequency identification function can not only manage and identify the item, but also easily determine whether the item has been invaded.

In a preferred embodiment, the electronic seal includes a bolt seat and a plug, and the bolt seat includes a seat for the plug to be inserted, a fastening device is fixed in the seat, and an antenna device is assembled in the seat body, and a radio frequency identification device is assembled in the seat. Wherein, the engaging device buckles the plug when the plug is inserted, so that the plug cannot retreat from the seat. More importantly, the radio frequency identification device forms an electrical connection with the antenna device in a state where the buckling device buckles the plug, and interrupts the electrical connection when the plug is cut off.

After the radio frequency identification device is electrically connected with the antenna device, it can receive a host electromagnetic wave emitted by an identification host, and transmit an identification electromagnetic wave containing an identification code according to the energy provided by the host electromagnetic wave for the identification host to receive. Therefore, through the manner in which the identification host receives the identification code, each article sealed by the electronic seal can be easily identified and managed, and whether the electronic seal has been changed can also be detected.

More importantly, when the plug is cut off, the radio frequency identification device will leave the antenna device and no longer emit the identification electromagnetic wave. Therefore, it can be judged whether the identification host has received the identification code. Whether the seal itself has been breached.

Description of drawings

Fig. 1 shows the first preferred embodiment of the present invention;

Fig. 2 shows the use situation of this first preferred embodiment;

Figure 3 shows the interaction between the first preferred embodiment and a host;

Fig. 4 is a schematic cross-sectional view showing a second preferred embodiment of the present invention;

Fig. 5 shows the third preferred embodiment of the present invention;

Figure 6 is a sectional view showing the plug of the third preferred embodiment;

Fig. 7 shows the use situation of this third preferred embodiment;

Fig. 8 is a three-dimensional exploded view showing the bolt seat of the third preferred embodiment;

Fig. 9 shows the bolt seat and an elastic element of the third preferred embodiment;

Fig. 10 is the A-A section showing the bolt seat of the third preferred embodiment;

Figure 11 is a partially enlarged view of Figure 10;

Fig. 12 shows the B-B section of the bolt seat of the third preferred embodiment;

Fig. 13 shows the situation that the plug of the third preferred embodiment is inserted into the plug seat;

Figure 14 is a partially enlarged view of Figure 13;

Fig. 15 shows the situation that the expansion seat of the third preferred embodiment is stretched;

Fig. 16 shows the situation that the plug of the third preferred embodiment is cut off;

Figure 17 is a partially enlarged view of Figure 16;

Fig. 18 shows the bounce-up situation of the slide seat after the plug is cut off according to the third preferred embodiment;

19-20 are cross-sectional diagrams showing the fourth preferred embodiment of the present invention and its operation.

Detailed ways

Please refer to FIG. 1 , which discloses a first preferred embodiment of the present invention. Therein, a plug seat 1 and a plug 2 are shown, and an antenna device 31 is located on the plug 2 , and a radio frequency identification chip 30 and a fastening device 12 are located on the plug seat 1 .

Please refer to FIG. 2 , which shows a door catch 4 that uses the plug 2 and the bolt seat 1 to seal the door of a container.

Please refer to Figure 3, which shows that in the state where the plug 2 is buckled in the bolt seat 1, the plug 2 is locked by the engaging device 12 and cannot retreat from the bolt seat 1, and the antenna device 31 passes through The two pins 31a touch the two pins 30a of the RFID chip 30 . This means that the RFID chip 30 is electrically connected to the antenna device 31 . At this time, as long as an identification host 5 emits a host electromagnetic wave 5a for the antenna device 31 to receive, the radio frequency identification chip 30 can convert the energy provided by the host electromagnetic wave 5a into a voltage, and use the voltage to store in the radio frequency identification An identification code of the chip 30 is modulated into an identification electromagnetic wave 3 a which is emitted by the antenna device 31 . After the identification host 5 receives and demodulates the identification electromagnetic wave 3a, it can obtain the identification code, and learn the identity of the container according to the identification code. This means that the container will be easily identified and managed. This advantage can greatly save manpower and time in management especially in the case of customs management of containers.

More importantly, if the plug 2 is cut off, the two pins 31a will also be cut off together, which makes the electrical connection between the radio frequency identification chip 30 and the antenna device 31 interrupted and the identification electromagnetic wave cannot be sent. 3a. Of course, the identification host 5 cannot read any identification code. In addition, if both the plug seat 1 and the plug 2 have been replaced, the identification code read by the identification host 5 is of course unexpected. Therefore, no matter whether the present invention is damaged or replaced, it can be detected quickly through the identification host 5. This advantage is very helpful in preventing smuggling of illegal or dangerous goods in the case of customs management of containers.

In addition, the antenna device 31 can also be installed on the plug seat 1, and the radio frequency identification chip 30 can be installed on the plug 2. In this way, the function of the first preferred embodiment can also be achieved.

Please refer to Fig. 4, which shows a second preferred embodiment of the present invention, its structure is roughly the same as that of the first preferred embodiment, but the difference is that the plug 2a in the second preferred embodiment has a A bolt 20 is formed, and the two pins 301a of the radio frequency identification chip 301 in the bolt seat 1a extend to the position facing the bolt 20 . When the plug 2a is inserted into the plug seat 1a, the plug rod 20 will touch the two pins 301a to form an electrical connection with the RFID chip 30 . In this way, the claimed effect of the first preferred embodiment can also be achieved.

Please refer to Fig. 5, which discloses the third preferred embodiment of the present invention, which shows a plug 6 and a plug seat 7, and can understand that the plug 6 includes a plug shell 60 and a bolt rod 61, a A hook 62 and a waterproof ring 63 . Wherein, the shell 60 further includes:

a head 600, made of thermoplastic material;

a body 601 made of thermoplastic material extending from the head 600; and

A tail portion 602 is made of conductive metal and connected to the body portion 601 , and a groove 603 is formed outside the tail portion 602 .

The hook 62 extends from the head 600 , and the waterproof ring 63 is sleeved on the body 601 .

Please refer to FIG. 6, which is a cross-sectional view of the plug 6, which shows that a protective block 64 made of a hard material is embedded in the head 600, and a first groove 601a is formed in the body 601 along its length direction. A second slot 602a is formed in the tail portion 602, and the first slot 601a and the second slot 602a are connected to form a bolt groove for the bolt rod 61 to pass through. Wherein, the bolt rod 61 is made of conductive metal, and its top end is fixed to the protection block 64 inside the head 600 , and its bottom end protrudes from the tail portion 602 .

Please refer to FIG. 7 , which shows a door catch 4a for sealing the door of a container by using the plug 6 and the bolt seat 7 .

Please refer to Figure 8, which shows that the bolt seat 7 includes:

The seat body 70 is composed of a first seat shell 701 and a second seat shell 702, on which two antennas are respectively a first antenna 71 and a second antenna 72, and the first antenna 71 is assembled on the second The outer wall of a housing 701 is pressed by a sign 73 , and the second antenna 72 is assembled inside the second housing 702 .

A radio frequency identification device includes a circuit board 740 , a sliding seat 75 , and an elastic element 77 . The circuit board 740 is formed with a radio frequency identification chip 74 (RFID Chip) and two conductive pins 741 electrically connected to the radio frequency identification chip 74 respectively. The sliding seat 75 is composed of a base 750 and a cover 751 buckled together. The circuit board 740 is fixed on the base 750 , and the two conductive pins 741 extend to the outer wall of the cover 751 .

A fastening device 78 is composed of a fixing seat 780, a buckle ring 781 and a gasket 782. A channel 780a is formed inside the fixing seat 780 for inserting the buckle ring 781. The gasket 782 has a hole 782a. And cover on the bottom surface of the fixing base 780 .

An expansion seat 79 has an inlet 791 and a slot 792 connected thereto. The slot 792 divides the expansion seat 79 into two pieces along the longitudinal axis.

When assembling the above-mentioned parts, the fastening device 78 is directly put into the first seat shell 701 after being assembled, and the sliding seat 75 carrying the circuit board 740 is first put into the expansion seat 79 after being assembled. Then put it into the first seat shell 701 together with the expansion seat 79 and an elastic element 77. When the second seat shell 702 is covered with the first seat shell 701 to form the seat body 70 , a slot 703 is formed on the seat body 70 as shown in FIG. 9 . Finally, after inserting an elastic stopper 76 into the seat body 70 through the slot 703, a transparent shell 80 can be covered on the seat body 70 composed of the first seat shell 701 and the second seat shell 702. superior.

Please refer to FIG. 10 , which shows the A-A sectional view of the bolt seat 7 . It is pointed out that the interior of the seat body 70 is connected to form a first chamber 703 and a second chamber 704 to form an insertion hole for the plug 6 to be inserted, and it is pointed out that the transparent shell 80 has an outer shell portion 801 and an inner shell portion 802, the outer shell portion 801 covers the outer wall of the base body 70, and presses against the nameplate 73 and the first antenna 71, and the inner shell portion 802 extends into the base body 70 from the opening, and covers the Part of the wall surface of the first chamber 703 presses against the fixing seat 780 . The fixing seat 780 then presses the spacer 782 , and the spacer 782 then presses the expansion seat 79 . Wherein, the fixing seat 780 is made of conductive metal, and presses the second antenna 72 , and the buckle 781 is located in the channel 780 a and is interposed between the washer 782 and the fixing seat 780 .

Please refer to FIG. 11 , which is a partially enlarged view of FIG. 10 . It is pointed out that part of the first antenna 71 and the second antenna 72 respectively extend to the wall of the second chamber 704, and are electrically connected to the two conductive pins 741 of the radio frequency identification chip 74, and do not enter the second chamber. 704 contacts the first antenna 71 and the second antenna 72 . This means that when the sliding seat 75 is in a home position shown in Figures 10 and 11, the radio frequency identification chip 74 does not form an electrical connection with the first antenna 71 and the second antenna 72, therefore, the radio frequency identification chip 74 It will not receive any electromagnetic waves, nor will it emit any electromagnetic waves. It should be noted that when the sliding seat 75 is in the original position, the elastic element 77 is compressed for the first time to accumulate some elastic force.

Please refer to FIG. 12 , which shows a B-B sectional view of the bolt seat 7 , and for simplicity of description, only a small part of the seat body 70 is shown in the figure. Wherein, the inlet 791 and the sectional groove 792 of the expansion seat 79 are more clearly indicated, and a space 793 and a retaining edge 794 are formed inside the expansion seat 79 enough to accommodate the sliding seat 5 . Wherein, the retaining edge 794 blocks the sliding seat 75 so that the sliding seat 75 stays at the original position. In addition, FIG. 12 also indicates that after the elastic stopper 76 is inserted into the seat body 70 , it will just clamp the sliding seat 5 .

Please refer to FIG. 13 , which shows the situation that the plug 6 is inserted into the plug seat 7 and cut along the line A-A. It is pointed out that the tail part 602 is inserted into the seat body 70 and reaches the position. At this time, the buckle 781 snaps into the groove 603 so that the whole plug 6 cannot retreat from the seat body 70 . Simultaneously, along with this insertion action, the bottom end of the bolt rod 61 also pushes the sliding seat 75 to a predetermined position. At this time, the elastic element 77 is compressed for the second time to accumulate more elastic force.

Please refer to Fig. 14, which shows the result of enlarging the part of Fig. 13 . Wherein it is pointed out that when the sliding seat 75 is at the predetermined position, the bottom end of the bolt bar 61 presses the sliding seat 75, and the two conductive pins 741 electrically connected to the radio frequency identification chip 74 follow the sliding seat 75 Then enter the second chamber 704 and touch the first antenna 71 and the second antenna 72 respectively.

Since the fixing seat 780, the clasp 781 and the tail 602 are all made of conductive metal, and the fixing seat 780 presses the second antenna 72, when the sliding seat 75 is at the predetermined position, the radio frequency identification chip 74 is not only electrically connected to the first antenna 71 and the second antenna 72, but also electrically connected to the bolt 61 via the second antenna 72. At this time, the bolt 61 is also used as an antenna, therefore, the radio frequency identification chip 74 can receive the host mentioned in the above-mentioned embodiment through the first antenna 71, the second antenna 72 and the bolt 61. electromagnetic waves, and emitting the identification electromagnetic waves mentioned in the above embodiments.

Please refer to FIG. 15 , which shows the situation that the plug 6 is inserted into the plug seat 7 and cut along the line B-B, and only a small part of the seat body 70 is shown in the figure for simplicity of illustration. It is pointed out that when the tail portion 602 is inserted into the seat body 70 and reaches the position, it is just inserted into the expansion seat 79 from the inlet 791, and because the outer diameter of the tail portion 602 is greater than the inner diameter of the inlet 791, the expansion seat 79 along the Cut groove 792 and be strutted, so, this retaining edge 794 just leaves original position along with this strutting action and no longer blocks this slide seat 75. Nevertheless, the sliding seat 75 is still supported by the bolt rod 61 and stays at the predetermined position.

Please refer to FIG. 16 , which shows the situation that the plug 6 is inserted into the plug seat 7 and cut along the line A-A. Wherein it is pointed out that when the plug 6 was cut off by the middle, the bolt rod 61 was also cut off thereupon. At this time, the elastic element 77 uses the elastic force accumulated in the second compression to return the sliding seat 75 to the original position, and then uses the elastic force accumulated in the first compression to bounce the sliding seat 75 to a higher level. s position. Although the plug 6 cannot withdraw from the seat body 70 because of the buckle 781 , the bolt rod 61 is pushed into the tail portion 602 by the sliding seat 75 because of being sheared off.

Please refer to Fig. 17, which shows the result of enlarging the part of Fig. 16. Wherein it can be clearly seen that the sliding seat 75 has almost completely popped out of the second chamber 704, and at this moment, the two conductive pins 741 electrically connected to the radio frequency identification chip 74 leave the second chamber 704 along with the sliding seat 75. The second chamber 704 is no longer electrically connected to the first antenna 71 and the second antenna 72 . This means that once the plug 6 is cut off, the RFID chip 74 will neither receive nor emit any electromagnetic waves.

Please refer to FIG. 18 , which shows the situation that the plug 6 is inserted into the plug seat 7 and cut along the line B-B, and for simplicity of illustration, only a small part of the seat body 70 is shown in the figure. It is pointed out that the expansion seat 79 has been stretched so that the retaining edge 794 no longer blocks the sliding seat 75, so the sliding seat 75 can be bounced to a higher position by the elastic element 77. It should be particularly noted that after the sliding seat 75 is bounced to a higher position, it will leave the second chamber 704 and the elastic stopper 76, so that the elastic stopper 76 is pinched inward to block into the The entrance of the second chamber 704 . This means that the sliding seat 75 cannot return after leaving the second chamber 704 .

It can be understood from the above description that the third preferred embodiment not only has all the functions of the above-mentioned preferred embodiments, but also can ensure that the radio frequency identification chip 74 can only be inserted and buckled in the plug seat 7 when the plug 6 Then start to work, meanwhile, once the plug 6 is cut off, the radio frequency identification chip 74 stops working. More particularly, utilize this elastic retainer 76 and this expansion seat 79 to constitute a guarantee mechanism, in order to guarantee that once this slide seat 75 leaves this second chamber 704 just can't return, this makes nobody can utilize the bolt that is cut off The rod 61 pushes the sliding seat 75 into the second chamber 704 again.

Please refer to FIG. 19, which shows a fourth preferred embodiment of the present invention, wherein a bolt 6a is inserted and buckled in a bolt seat 7a, and the bolt seat 7a includes:

a seat 70a;

A fastening device (not shown in the figure), is fixed in this seat body 70a, in order to fasten it when this plug 6a is inserted;

A radio frequency identification chip 74a, fixed on the base body 70a;

two antennas 71a, each fixed on the base body 70a, and each electrically connected to the radio frequency identification chip 74a; and

A short-circuit device 9 is assembled in the base body 70a in a movable manner, and short-circuits the two antennas 71a when the plug 6a is fastened by the fastening device before being cut off, as shown in FIG. 20 . Indicates that at this moment, the radio frequency identification chip 74a is unable to operate.

It is also worth mentioning that the radio frequency identification chips 30, 74, and 74a are all RFID chips commonly known in the industry, and existing products can be used, such as EM 4222, EM 4422, and EM 4223 produced by EM Microelectronic, and produced by Philips. SL 3 ICS 30, and XRA00 produced by ST Microelectronicsco., Ltd.

Claims (13)

1. An electronic seal, characterized in that it comprises: A plug, comprising a shell and a shank, the shank passing through the shell, partly fixed to the shell and partly protruding from the shell; and A hitch, including: A base body, the inside of which forms a first chamber and a second chamber, the first chamber communicates with the external space, and the second chamber communicates with the first chamber; a buckling device, fixed in the first chamber, and buckles the bolt shell when the bolt shell is inserted into the buckling device; An antenna device is fixed on the base and partially extends to the second chamber; and A radio frequency identification device, comprising: A sliding seat is movably assembled in the first chamber and is located between the fastening device and the second chamber, and the sliding seat is held in the state where the fastening device fastens the shell The bolt moves to a predetermined position; A radio frequency identification chip is fixed inside the sliding seat, and enters the second chamber when the sliding seat is pushed to the predetermined position to form an electrical connection with the antenna device; and An elastic element is fixed in the second chamber, and accumulates an elastic force when the slide is pushed to the predetermined position, and pushes the slide away from the slide by the elastic force when the plug is cut off. Book a spot. 2. The electronic seal according to claim 1, wherein the fastening device comprises: A fixing seat, fixed in the first chamber of the seat body, and forming a channel inside for the bolt shell to pass through; a buckle, located in the channel of the holder, for fastening the shell as it passes; and A spacer is fixed in the channel of the fixing base to seal the buckle, and the spacer has a hole for the shell to pass through. 3. The electronic seal according to claim 2, characterized in that, the bolt rod, the part of the bolt case in contact with the fastening device, and the fastening device all have electrical conductivity, and the fixing seat does not press against the fastening device. the second antenna. 4. The electronic seal according to claim 1, 2, or 3, wherein the bolt seat further includes: A guarantee mechanism is installed in the first chamber of the seat body, and blocks the sliding seat from returning to the predetermined position when the sliding seat is pushed away from the predetermined position by the elastic element. 5. A bolt, including a bolt shell and a bolt rod, characterized in that: The shell includes: a head, made of thermoplastic material; a body made of thermoplastic material extending from the head and defining a first channel inside the body along its length; and a tail made of conductive metal and joined to the body, and the tail has a groove formed on the outside and a second channel connected to the first channel on the inside; and The bolt rod is passed through the first and second grooves, and has a top end and a bottom end, the top end is fixed on the head, and the bottom end protrudes from the tail. 6. A bolt seat, characterized by comprising: The base body has a socket for a plug to be inserted into; a fastening device, fixed in the socket, and fastens the plug when the plug is inserted; two antennas, each fixed on the base body, and a part of each extending to the jack; and A radio frequency identification device is movably assembled in the socket, and is pushed by the plug to a predetermined position where it forms an electrical connection with the two antennas when the fastening device fastens the plug, And in the state that the plug is cut off, withdraw from the predetermined position. 7. The bolt seat according to claim 6, wherein the radio frequency identification device comprises: A sliding seat is movably assembled in the socket, and the sliding seat is pushed to the predetermined position by the plug when the fastening device buckles the plug; A circuit board, fixed inside the slider, on which is formed a radio frequency identification chip and two conductive pins, the two conductive pins are respectively electrically connected to the radio frequency identification chip, and when the slider is pushed to the predetermined position are respectively electrically connected to the first and second antennas; and An elastic element is fixed in the socket, and accumulates an elastic force when the sliding seat is pushed to the predetermined position, and pushes the sliding seat away from the predetermined position by the elastic force when the plug is cut off. Location. 8. The bolt socket as claimed in claim 7, further comprising: A guarantee mechanism is installed in the insertion hole of the seat body, and blocks the sliding seat from returning to the predetermined position when the sliding seat is pushed away from the predetermined position by the elastic element. 9. The bolt seat according to claim 8, wherein said securing mechanism comprises: An expansion seat is fixed in the socket of the seat body, and is located between the fastening device and the slide seat, and the expansion seat has an inlet and a slot connected thereto, and a foot is formed inside for covering The space of the sliding seat and a retaining edge, wherein the split groove divides the expansion seat into two pieces along the longitudinal axis, the retaining edge blocks the sliding seat, and inserts the entrance of the bolt shell to expand the two pieces Leave the slide under the state of the body; and An elastic stopper is fixed in the socket of the seat body and clamps the sliding seat. 10. The bolt socket as claimed in claim 6, wherein said engaging means is electrically conductive and presses against one of the antennas. 11. An electronic seal, characterized in that it has a radio frequency identification chip and a matching antenna device, and the radio frequency identification chip and antenna device provide a radio frequency identification function when the electronic seal seals a door, and when the electronic seal seals a door This RFID function ceases to be available when the e-seal is cut. 12. An electronic seal, characterized by comprising: a plug; an antenna device fixed on the plug; and A hitch, including: a seat for insertion of the plug; a fastening device, fixed in the seat, and fastens the plug when the plug is inserted into the fastening device; and A radio frequency identification device assembled in the seat; Wherein, the radio frequency identification chip and the antenna device provide a radio frequency identification function when the fastening device buckles the plug, and stop providing the radio frequency identification function when the plug is cut off. 13. An electronic seal, characterized by comprising: a plug; and A hitch, including: a seat for insertion of the plug; a buckling device, fixed in the seat, and buckles the plug when the plug is inserted; a radio frequency identification chip fixed on the base; two antennas, each fixed on the base, and each electrically connected to the radio frequency identification chip; and A short-circuit device is assembled in the base in a movable manner, and short-circuits the two antennas when the plug is clipped by the fastening device.

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