Coupling type electronic seal

Abstract

The anti-theft lock comprises a plug and a lock seat, the plug is composed of a plug piece and a circuit device. The bolt piece is provided with a containing hole capable of installing a circuit device, the containing hole defines a hole body arranged in the axial direction, and a hole bottom communicated with the inside and the outside is defined at the bottom end of the hole body. The circuit device is provided with an RFID chip used for being electrically connected with a main circuit and a radiation unit, the main circuit is provided with a lower contact, and the radiation unit is controlled to generate a coupling feed-in effect with the hole body, so that the bolt piece forms an upper monopole antenna of the circuit device; and the lock seat is provided with a lower polar antenna and is provided with a lock hole for locking the bolt piece, so that when the lower polar antenna is controlled to be electrically connected with the lower contact, the upper polar antenna and the lower polar antenna are combined to form a standard dipole antenna, and the standard dipole antenna is enough to send out a signal capable of being monitored. And the coupling type electronic sealing strip is used for enabling the bolt piece to form an upper monopole antenna.

Description

Technical Field

[0001] The present invention relates to the field of electronic seals, and in particular to a circuit device which is a coupled electronic seal that uses a radiation unit coupling feeding effect to enable a bolt to form an upper monopole antenna. Background Art

[0002] Please refer to the US patent US09508271 that has been authorized by the applicant. The bolt of the previous case is provided with a bolt, a circuit device and an upper cover. The lower contact of the circuit device is an exposed protruding bolt, so that when the bolt is locked in the lock seat and the container door bolt is closed, it is used to electrically connect the lower monopole antenna inside the lock seat, thereby sending a signal for monitoring by the customs host. At this time, the circuit device will switch to an electrical connection with the upper cover, which is a direct contact feed, so that the bolt forms an upper monopole antenna to amplify the signal.

[0003] However, the previous case has the following aspects to be improved: First, the part where the circuit device contacts the upper cover needs to be copper plated on the side, which makes it impossible to reduce the cost of the circuit device.

[0004] Second, the circuit device and the upper cover must have a precise clutch structure to control the timing of the bolt forming the upper monopole antenna. This structure causes the overall production cost to be uneconomical.

[0005] 3. When the bolt seals the cover, there will be cumulative tolerances or poor sealing, resulting in insufficient reading distance.

[0006] Fourth, when the bolt forms an upper monopole antenna, it is electrically connected to the upper cover through the top of the circuit device, so that the bolt is configured as an inverted L-shaped antenna that sends signals from the top downward. When it works in conjunction with the lower monopole antenna, it is a non-standard dipole antenna, and its antenna gain is much smaller than that of the standard dipole antenna configuration, and has the disadvantage of insufficient reading distance.

[0007] 5. Because the lower contacts of the circuit device are exposed, it is very easy for hand tools to grip and apply force, forcing the circuit device to be pulled out of the bolt receiving hole, which may cause the structure to be easily damaged and disassembled. In addition, if the lower contacts come into contact with any conductive material or skin, there will be safety concerns about false triggering of signals. Summary of the invention

[0008] To solve the above problems, the present invention provides a circuit device which is a coupled electronic seal for forming a bolt into an upper monopole antenna through a coupling feeding effect of a radiation unit.

[0009] The present invention includes: A plug, mainly composed of a bolt and a circuit device; the bolt has an upper buckle and a receiving hole for installing the circuit device, the receiving hole defines a hole body arranged along the axial direction, and further defines a hole bottom communicating with the inside and outside at the bottom end of the hole body; the circuit device is installed with an RFID chip, and further has a main circuit and a radiation unit electrically connected to the RFID chip, the main circuit has a lower contact, and further controls the radiation unit to generate a coupling feeding effect with the hole body of the bolt, so that the bolt constitutes an upper monopole antenna of the circuit device; A lock base with a lower monopole antenna installed has a lock hole for the lower part of the bolt to be inserted, and a lower buckle for positioning the upper buckle, so that the bolt can be locked on the lock base, and the lower monopole antenna is controlled to be electrically connected with the lower contact to activate the RFID chip, thereby combining the upper monopole antenna and the lower monopole antenna into a dipole antenna.

[0010] By adopting the above structure, the present invention installs a circuit device with a radio frequency circuit in the bolt hole. The circuit device is further electrically connected to a radiation unit, and the radiation unit is controlled to produce a coupling feed effect with the hole body of the hole. The electromagnetic wave signal is transmitted through the frequency response, so that the bolt constitutes the upper monopole antenna of the circuit device. This technology enables the circuit device to be made without directly electrically connecting the bolt, so the circuit device of the previous case needs to undergo a copper plating process on the side, and the unstable process of the top of the bolt hole needs to be tightly closed with the upper cover can be improved. The clutch structure between the circuit device and the upper cover of the previous case is further simplified, and the requirement that the bolt of the previous case needs to completely seal the upper cover is eliminated. By eliminating many problems of contact between the top of the device and the upper cover, the production cost of the electronic seal is effectively reduced and the yield rate is improved. Therefore, this case is more economical than the previous case.

[0011] Furthermore, the radiation unit is arranged in a planar shape, and by controlling the area parameters of the radiation unit and the relative position parameters of the radiation unit in the receiving hole, the radiation unit is sufficient to generate a frequency response with the hole body without contacting the hole body, so as to produce a coupled feeding effect.

[0012] Furthermore, the radiation unit generates a coupling feeding effect with the bottom edge of the hole body, so that the upper monopole antenna and the lower monopole antenna can form a dipole antenna with a standard configuration when combined.

[0013] Furthermore, the circuit device is defined with a front side and a back side opposite to the front side. The main circuit is arranged on the front side and a lower contact is arranged on the bottom of the circuit device. The radiation unit is arranged on the back side and an isolation area is maintained between the radiation unit and the lower contact.

[0014] Furthermore, the main circuit is provided with a matching circuit at the top of the circuit device, and a bridge circuit is provided between the lower contact and the midpoint of the matching circuit. The RFID chip has a main signal pin connected to one end of the matching circuit and an auxiliary signal pin connected to the other end of the matching circuit. The circuit device is also provided with a conductive part, which is connected to a front conductor connected to one end of the matching circuit and a rear conductor connected to the radiation unit.

[0015] Furthermore, by controlling the area parameters of the lower contact and the spacing parameters between the lower contact and the top of the lower monopole antenna, when the bolt is locked and locked, the lower contact and the top of the lower monopole antenna are controlled to produce a coupling feeding effect without contact, thereby achieving mutual electrical connection.

[0016] Furthermore, a locking area is maintained between the lower contact and the bottom of the hole, and the top of the lower monopole antenna is suspended and positioned in the lock seat, so that when the bolt is locked in the lock seat, the top of the lower monopole antenna can pass through the locking area relatively and then be electrically connected to the lower contact.

[0017] Furthermore, the lower monopole antenna is composed of at least one spring, which is installed at a position corresponding to the lock hole, so that the spring not only provides pre-pressure for the electrical connection between the lower monopole antenna and the lower contact, but also further controls the spring to match the frequency band monitored by the customs host.

[0018] By adopting the above structure, the present invention can easily control the coupling feeding effect between the radiation unit and the bottom edge of the hole body, so that the bolt constitutes an upper monopole antenna, which can form a standard dipole antenna mode when combined with the lower monopole antenna. In contrast, the previous case uses the top of the circuit device to electrically connect the upper cover, which cannot form a standard dipole antenna mode at all. Therefore, the dipole antenna formed by the present invention can indeed obtain high antenna gain and have a better reading distance. In addition to completely hiding the lower contact of the circuit device in the bolt hole, the present invention also controls the lower contact and the bottom of the hole to maintain a locking area. Such a configuration can indeed eliminate the problem that the circuit device of the previous case is easily pulled out and triggers the signal by mistake, and Then, during the process of locking the bolt and the lock seat, the top end of the lower monopole antenna is controlled to relatively enter the sleeve area, so that the lower monopole antenna can be electrically connected to the lower contact. The overall configuration is quite reasonable and has great industrial applicability and progress. The present invention uses a spring directly as a lower monopole antenna, so that the spring not only provides a pre-pressure for the electrical connection between the lower monopole antenna and the lower contact, but also further controls the spring to match the frequency band monitored by the customs host. This design is unprecedented. Furthermore, the present invention uses the number of spring coils and diameters to further control the total length of the spring to match the bolt length of the upper monopole antenna in a limited space, thereby greatly reducing the material and manufacturing costs of the lock seat. In summary, by further controlling the radiation unit to produce a coupling feeding effect with the bottom edge of the hole body, when the lower portion of the bolt is locked in the lock hole of the lock seat to electrically connect the circuit device to the lower monopole antenna of the lock seat, the upper and lower monopole antennas are combined into a standard dipole antenna (Dipole Antenna), so that the overall operation of the present invention has a better antenna gain than the previous case, which is sufficient to improve the poor performance of the top electrical connection cover of the circuit device in the previous case. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the decomposition of the present invention.

[0020] Figure 2 It is a front schematic diagram of the circuit device of the present invention.

[0021] Figure 3 It is a schematic diagram of the back side of the circuit device of the present invention.

[0022] Figure 4 It is a schematic diagram of the positions of the bolt, the lock seat and the door bolt of the present invention.

[0023] Figure 5 yes Figure 4 Schematic cross-section diagram of .

[0024] Figure 6 yes Figure 5 Schematic diagram of the cross section at the AA position.

[0025] Figure 7 yes Figure 5 Schematic diagram of the combination.

[0026] Figure 8 It is a schematic diagram of the position of the radiation unit when the bolt and the lock base are locked.

[0027] Fig. 9 It is a schematic diagram of the electromagnetic wave operation of the standard dipole antenna mode of the present invention.

[0028] Description of Figure Numbers: A plug; 10 bolt; 11 shaft; 12 cap head; 13 receiving hole; 131 hole top; 132 hole bottom; 133 hole body; 14 upper buckle; 20 circuit device; 20A front; 20B back; 211 male plug; 212 female plug; 213 through hole; 214 tip; 22 main circuit; 221 lower contact; 222 matching circuit; 223 bridge circuit; 23 radiation unit; 24 RFID chip; 241 main signal pin; 242 auxiliary signal pin; 243 fixing foot; 25 conductive part; 251 front conductor; 252 rear conductor; 26 isolation area; H sleeve latch area; B lock seat; 30 shell; 31 box chamber; 32 lock hole; 33 shoulder; 34 bottom cover; 40 base; 41 first hole; 42 second hole; 43 third hole; 44 fourth hole; 50 lower buckle; 51 retaining ring; 511 fifth hole; 512 push-pull hole; 52 buckle; 60 lower monopole antenna; 61 spring; 62 slider; 621 flange; C bolt. DETAILED DESCRIPTION

[0029] like Figure 4 As shown, the electronic seal of the present invention is composed of a plug A and a lock base B. The plug A can lock the lock base B from top to bottom to lock the container door bolt C, so that the customs host can monitor whether the container door bolt C is opened normally.

[0030] Please see Figures 1 to 7 The plug A is mainly composed of a circuit device 20 installed inside a plug member 10, wherein: The bolt 10 is made of a metal conductive material, and comprises a shaft 11, a cap 12 radially expanding outwardly at the top of the shaft 11, a receiving hole 13 with an opening facing downward, and an upper buckle 14 concave at the outer circumference of the lower part of the shaft 11. The receiving hole 13 is arranged along the axial direction of the shaft 11, and defines a closed hole top 131, an open hole bottom 132, and a hole body 133 between the hole top 131 and the hole bottom 132, so that the hole bottom 132 communicates with the inside and outside of the bottom end of the hole body 133; The circuit device 20 is made of a double-layer printed circuit board, and can also be made of a flexible circuit board, spray material or wire method. It is defined by a front face 20A and a back face 20B opposite to the front face 20A, so that it can be inserted into the hole 13 from bottom to top, and then completely embedded in the hole body 133. The fixing method is that a male plug 211 is provided between the front face 20A and one side of the hole body 133, and a female plug 212 is provided between the back face 20B and the other side of the hole body 133. The circuit device 20 is provided with a through hole 213 for a pin 214 to install the male plug 211 and the female plug 212 on the circuit device 20, so that the male plug 211 and the female plug 212 can withstand the radial tightening of the hole body 133, thereby clamping the circuit device 20; The circuit device 20 uses etching technology to set a main circuit 22 on the front side 20A, and a planar radiation unit 23 is set on the bottom edge of the back side 20B; the main circuit 22 is provided with a lower contact 221 at the bottom of the circuit device 20, a matching circuit 222 is provided at the top of the circuit device 20, and a bridge circuit 223 is provided between the lower contact 221 and the middle point of the matching circuit 222, so that the matching circuit 222 and the bridge circuit 223 can be arranged longitudinally in a large range relative to the shaft 11, so that the shaft 11 can interrupt the main circuit 22 when it is cut to meet the needs of opening the container. In addition, since the circuit device 20 is completely embedded and fixed in the container hole 13, the present invention can control the lower contact 221 and the bottom of the container hole 13 to maintain a set of control area H, so as to facilitate the operation described later; the main circuit 22 and the radiation unit 23 are electrically connected to an RFID chip 24 to form a radio frequency circuit (Radio FrequencyCircuit), the RFID chip 24 is mounted on the top edge of the front side 20A, and has a main signal pin 241 connected to one end of the matching circuit 222, a sub-signal pin 242 connected to the other end of the matching circuit 222, and a fixing pin 243 for providing auxiliary support; The circuit device 20 has a hole-shaped conductive portion 25 extending through the top edge. The conductive portion 25 has a front lead 251 connected to one end of the matching circuit 222 at the front end, and a rear lead 252 connected to the radiation unit 23 at the rear end of the conductive portion 25, so as to provide electrical connection between the RFID chip 24, the main circuit 22 and the radiation unit 23, and to control the radiation unit 23 to maintain a connection with the lower contact 221. Figure 3The isolation area 26 shown is to prevent the radiation unit 23 from forming a short circuit with the lower contact 221. It is particularly noted that the main circuit 22, the RFID chip 24 and the conductive portion 25 cannot be directly electrically connected to the bolt 10 to prevent the circuit device 20 from easily sending a signal due to accidentally touching the bolt 10. The present invention mainly controls the area parameters of the planar radiation unit 23 and the relative position parameters of the hole 13 so that the radiation unit 23 is sufficient to generate a coupling feed effect with the hole body 133 when it does not contact the hole body 133, so that the bolt 10 constitutes the upper monopole antenna of the circuit device 20. The coupling feed effect is not a capacitive energy storage effect of a general electronic circuit, but a frequency response (Frequency) generated by the radiation unit 23 and the hole body 133. response), so that the signal of the RF circuit is coupled and fed in, so as to transmit the electromagnetic wave signal to reach the hole 133 of the electrical connection bolt 10, and at this time, the upper monopole antenna cannot directly activate the RFID chip 24 due to the low gain (Gain); the aforementioned area parameters and relative position parameters are set by those skilled in the art according to the adaptability of product size; it should be specially stated here that when the area of ​​the radiation unit 23 exceeds the area parameter, an antenna effect will be directly formed, and the signal of the RFID chip 24 will be blocked in the metal hole 13, and it is impossible to send and receive signals through the bolt 10. In addition, when the area of ​​the radiation unit 23 is smaller than the area parameter, the radiation unit 23 cannot generate a frequency response with the bolt 10, so it is still impossible to send and receive signals through the bolt 10; The lock base B is composed of a housing 30, a base 40, a lower buckle 50 and a lower monopole antenna 60; The housing 30 is generally cylindrical and has a box chamber 31 that is concave upward from the bottom, and a lock hole 32 that extends upward from the top of the box chamber 31. The lock hole 32 has a diameter that is large enough for the lower part of the bolt 10 to be inserted and is smaller than the diameter of the box chamber 31. Therefore, a shoulder 33 is formed at the top of the box chamber 31. As for the bottom of the box chamber 31, it can be installed and closed by a bottom cover 34. The base 40 is fixed in the chamber 31 so as to be positioned between the shoulder 33 and the bottom cover 34. The base 40 is connected with a first hole 41, a second hole 42, a third hole 43, and a fourth hole 44 which are coaxially arranged with the lock hole 32 in sequence from top to bottom. The aperture of the second hole 42 is controlled to be equal to the aperture of the lock hole 32 for inserting the bottom end of the bolt 10. The aperture of the first hole 41 is larger than the aperture of the second hole 42 for providing installation for the lower buckle 50 described later. The aperture of the third hole 43 is controlled to be smaller than the aperture of the second hole 42. As for the aperture of the fourth hole 44, it is larger than the aperture of the third hole 43 so that the third hole 43 and the fourth hole 44 can be installed for the lower monopole antenna 60 described later. The lower buckle 50 is composed of a retaining ring 51 and a buckle 52. The retaining ring 51 is placed in the first hole 41, and the top end is positioned at the shoulder 33. It has a fifth hole 511 for the bottom end of the bolt 10 to pass through. The bottom end of the fifth hole 511 is coaxially connected to a push-out hole 512. The diameter of the push-out hole 512 gradually expands downward. As for the buckle 52, it is installed within the push-out hole 512. Its outer diameter is larger than the second hole 42, so that it can be engaged with the upper buckle 14 when it is opposite to the buckle 14, so that the buckle 52 can limit the bolt 10 from escaping from the lock seat B. The lower monopole antenna 60 is composed of a spring 61 installed in the fourth hole 44 and a slider 62 slidably fitted in the third hole 43. The spring 61 is in contact between the bottom cover 34 and the bottom end of the slider 62. The bottom end of the slider 62 is radially extended with a flange 621, so that the spring 61 provides a pre-pressure to the slider 62, and the flange 621 of the slider 62 is actuated to stop at the top end of the fourth hole 44, so as to control the top end of the slider 62 to be suspended and positioned in the second hole 42 at any time, so as to be able to be inserted into the sleeve area H and match with the lower contact 221; Please cooperate Figures 4 to 7 It can be seen that when the lower part of the bolt 10 is to be inserted into the lock hole 32 to lock the container door bolt C, during the process of the lower part of the bolt 10 continuing to be inserted into the lock hole 32, the top of the slider 62 will relatively enter the sleeve area H and abut the lower contact 221, and then overcome the pre-pressure of the spring 61 to allow the lower part of the bolt 10 to continue to be inserted downward into the lock hole 32, so that the upper buckle 14 is locked and positioned on the lower buckle 50, so that the bolt 10 is locked to the lock seat B and cannot be disengaged, so that the top of the slider 62 remains electrically connected to the lower contact 221, so that the spring 61 and the slider 62 constitute the lower monopole antenna 60 that activates the RFID chip 24, thereby gaining the upper monopole antenna, so that the upper monopole antenna and the lower monopole antenna 60 are combined into a Figure 8 and Fig. 9 The standard dipole antenna shown in the figure can emit RFID frequency band or microwave frequency band signals that can be identified and managed by the customs host, thereby ensuring effective monitoring of the container lock. If the container door bolt C is to be opened normally, it is only necessary to use a hydraulic shear to destroy the bolt 10 from the middle to cut off the main circuit 22, thereby interrupting the signal; it is particularly explained here that the present invention can control the lower contact 221 and the top of the lower monopole antenna 60 to produce a coupling feeding effect without contact when the bolt 10 locks the lock seat B, so that the lower contact 221 transmits electromagnetic wave signals to the top of the lower monopole antenna 60, thereby achieving mutual electrical connection. The aforementioned area parameters and spacing parameters are set by those skilled in the art according to the adaptability of product size.

[0031] The present invention does have the following advantages: 1. The present invention controls the radiation unit to produce a coupling feeding effect with the hole of the bolt to transmit electromagnetic wave signals, so that the bolt constitutes the upper monopole antenna of the circuit device. This technology enables the circuit device to be made without directly electrically connecting the bolt, so the side copper plating process of the circuit device of the previous case can be eliminated, and the clutch structure between the circuit device and the upper cover of the front case is further simplified, and the requirement that the bolt of the front case must completely seal the upper cover is eliminated. Therefore, this case is more economical than the previous case.

[0032] 2. Please cooperate Figure 8 and Fig. 9 It can be seen that the present invention can easily control the coupling feeding effect between the radiation unit and the bottom edge of the hole body, so that the bolt constitutes an upper monopole antenna, which can form a standard dipole antenna mode when combined with the lower monopole antenna. In contrast, the previous case uses the top of the circuit device to electrically connect the upper cover, which cannot form a standard dipole antenna mode at all. Therefore, the dipole antenna formed by the present invention can indeed obtain high antenna gain and have a better reading distance.

[0033] 3. In addition to completely hiding the lower contact of the circuit device in the bolt hole, the present invention also controls the lower contact to maintain a locking area between the lower contact and the bottom of the hole. Such a configuration can indeed eliminate the problem that the circuit device of the previous case is easily pulled out and the signal is triggered by mistake. Furthermore, during the process of locking the bolt and locking the seat, the top of the lower monopole antenna is controlled to relatively enter the locking area, so that the lower monopole antenna can be electrically connected to the lower contact. Such overall configuration is quite reasonable and has great industrial applicability and progress.

[0034] Fourth, the present invention utilizes the spring directly as the lower monopole antenna, so that the spring not only provides the pre-pressure for the electrical connection between the lower monopole antenna and the lower contact, but also further controls the spring to match the frequency band monitored by the customs host. This design is unprecedented; furthermore, the present invention uses the number of spring coils and diameters to further control the total length of the spring to match the length of the bolt of the upper monopole antenna in a limited space, thereby greatly reducing the material and manufacturing costs of the lock seat.

Claims

1. A coupled electronic seal, characterized in that: include: A plug, mainly composed of a bolt and a circuit device; the bolt has an upper buckle and a receiving hole for installing the circuit device, the receiving hole defines a hole body arranged along the axial direction, and further defines a hole bottom communicating with the inside and outside at the bottom end of the hole body; the circuit device is installed with an RFID chip, and further has a main circuit and a radiation unit electrically connected to the RFID chip, the main circuit has a lower contact, and further controls the radiation unit to generate a coupling feeding effect with the hole body of the bolt, so that the bolt constitutes an upper monopole antenna of the circuit device; A lock base with a lower monopole antenna installed has a lock hole for the lower part of the bolt to be inserted, and a lower buckle for positioning the upper buckle, so that the bolt can be locked on the lock base, and the lower monopole antenna is controlled to be electrically connected with the lower contact to activate the RFID chip, thereby combining the upper monopole antenna and the lower monopole antenna into a dipole antenna.

2. The coupled electronic seal according to claim 1, characterized in that: The radiation unit is arranged in a planar shape, and by controlling the area parameter of the radiation unit and the relative position parameter of the radiation unit in the receiving hole, the radiation unit is used to generate a frequency response with the hole body when not in contact with the hole body, so as to produce a coupling feeding effect.

3. The coupled electronic seal according to claim 1, characterized in that: The radiation unit generates a coupling feeding effect with the bottom edge of the hole body, so that the upper monopole antenna and the lower monopole antenna can form a dipole antenna with a standard configuration when combined.

4. The coupled electronic seal according to claim 1, 2 or 3, characterized in that: The circuit device is defined by a front side and a back side opposite to the front side. The main circuit is arranged on the front side and a lower contact is arranged on the bottom of the circuit device. The radiation unit is arranged on the back side and an isolation area is maintained between the radiation unit and the lower contact.

5. The coupled electronic seal according to claim 4, characterized in that: The main circuit is provided with a matching circuit at the top of the circuit device, and a bridge circuit is provided between the lower contact and the middle point of the matching circuit. The RFID chip has a main signal pin connected to one end of the matching circuit and a secondary signal pin connected to the other end of the matching circuit. The circuit device is also provided with a conductive part, which is connected to a front conductor connected to one end of the matching circuit and a rear conductor connected to the radiation unit.

6. The coupled electronic seal according to claim 1, 2 or 3, characterized in that: By controlling the area parameter of the lower contact and the spacing parameter between the lower contact and the top of the lower monopole antenna, when the bolt is locked and locked, the lower contact and the top of the lower monopole antenna are controlled to produce a coupling feeding effect without contact, thereby achieving mutual electrical connection.

7. The coupled electronic seal according to claim 1, 2 or 3, characterized in that: A locking area is maintained between the lower contact and the bottom of the hole, and the top of the lower monopole antenna is suspended and positioned in the lock seat, so that when the bolt is locked in the lock seat, the top of the lower monopole antenna can pass through the locking area relatively and then be electrically connected to the lower contact.

8. The coupled electronic seal according to claim 1, 2 or 3, characterized in that: The lower monopole antenna is composed of at least one spring, which is installed at a position corresponding to the lock hole. In addition to providing pre-pressure for the electrical connection between the lower monopole antenna and the lower contact, the spring is further controlled to match the frequency band monitored by the customs host.

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