TWI849985B - Coupling electronic seal - Google Patents

Abstract

The contents of the present invention are as follows:

(1) The present invention provides a circuit device that comprises a radiation frequency circuit in a receiving hole of a bolt pin, and the circuit device is electrically connected with a radiation unit, and the radiation unit and a hole body of the receiving hole generate an effect of coupling feed so as to transmit an electromagnetic wave signal by means of frequency response to thereby make the bolt pin forming an upper monopole antenna of the circuit device. As such, instability of a production process of the prior art device in which a top end of the receiving hole of the bolt pin must be in tight engagement with the upper lid can be alleviated, and various issues related to contact between the top end of the circuit device and the upper lid can be removed to thereby effectively lower down the production cost of an electronic seal and improve yield.

(2) An effect of coupling feed can be established between the radiation unit and a bottom of the hole body. Accordingly, when a lower portion of the bolt pin inserts into and locks up a locking hole of the bolt seat to have the circuit device electrically connected with a lower monopole antenna of the bolt seat, the upper and lower monopole antennas jointly form a standard dipole antenna, and thus, the entirety of operation of the present invention surely provides an antenna gain over the prior art device and sufficing to alleviate the issue of poor performance of the top end of the circuit device of the prior art device electrically connecting with the upper lid.

Description

Coupled electronic seal

The present invention particularly refers to a circuit device that uses a coupling feed effect of a radiation unit to enable the bolt to form an electronic seal on a monopole antenna.

Please refer to the previous case US09508271 approved by the inventor. The previous case plug 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 to the lower monopole antenna inside the lock seat, thereby sending a signal for the customs host to monitor. At this time, the circuit device will switch to an electrical connection with the upper cover, which is a direct contact method feed, so that the bolt forms an upper monopole antenna to amplify the signal.

However, the previous case has the following aspects that need to be improved:

1. The part where the circuit device contacts the upper cover needs to be copper-plated on the side. This process makes it impossible to reduce the cost of the circuit device.

Second, the circuit device and the upper cover must have a structure that can be precisely disengaged in order to control the timing of the bolt forming the upper monopole antenna. This structure configuration causes the overall production cost to be uneconomical.

3. When the bolt is sealed and covered, there will be progressive tolerance or poor sealing, resulting in insufficient reading distance.

4. 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 is used in conjunction with the lower monopole antenna, it is a non-standard dipole antenna. Its antenna gain is much smaller than that of the standard dipole antenna configuration, and it has the disadvantage of insufficient reading distance.

5. Because the lower contacts of the circuit device are exposed, it is very easy to provide hand tools to hold and apply force, forcing the circuit device to be pulled out of the bolt hole, which may cause the structure to be easily damaged and scattered. In addition, if the lower contacts touch any conductive material or skin, there will be safety concerns about accidentally triggering a signal.

Contents of this invention:

1. The present invention installs a circuit device with a radio frequency circuit on the bolt hole. The circuit device is further electrically connected to a radiation unit, which controls the radiation unit to produce a coupling feed effect with the hole body of the hole, and transmits electromagnetic wave signals through frequency response, so that the bolt constitutes the upper monopole antenna of the circuit device. It improves the unstable process of the top of the bolt hole of the front case that needs to be tightly closed with the upper cover, and eliminates many problems of the top of the circuit device contacting the upper cover, thereby effectively reducing the production cost of electronic seals and improving the yield rate.

Second, the radiation unit is further controlled to produce a coupling feedback effect with the bottom edge of the hole body. Accordingly, when the lower part of the bolt is locked in the lock hole of the lock seat, the circuit device is electrically connected to the monopole antenna under the lock seat, so that the upper and lower monopole antennas are combined into a standard dipole antenna, so that the overall operation of the present invention has antenna gain (Gain) compared to the previous case, which is enough to improve the poor performance of the top electrical connection cover of the circuit device in the previous case.

A: Plug in

10: Bolts

11:Shaft

12: Hat head

13: Volume

131: Hole top

132: Bottom of hole

133: Hole

14: Upper buckle

20: Circuit device

20A: Front

20B: Back

211: Male plug

212: Female plug

213: Through hole

214: Tips

22: Main circuit

221: Lower contact

222: Matching line

223: Bridge line

23: Radiation Unit

24: RFID chip

241: Main signal pin

242: Auxiliary signal pin

243: Fixed foot

25: Conductive part

251: Leading line

252: Rear conductor

26: Isolation area

H: latch area

B: Lock seat

30: Shell

31: Box Room

32: Keyhole

33: Shoulders

34: Bottom cover

40: Base

41: First hole

42: Second hole

43: The third hole

44: The fourth hole

50: Lower buckle

51:Block ring

511: The fifth hole

512: Push-pull hole

52: Buckle

60: Place an order for the polar line

61: Spring

62: Slider

621: Sudden Edge

C: Door bolt

Figure 1 is a schematic diagram of the decomposition of the present invention.

Figure 2 is a front view schematic diagram of the circuit device of the present invention.

Figure 3 is a schematic diagram of the back side of the circuit device of the present invention.

Figure 4 is a schematic diagram of the positions of the bolt, lock base and door bolt of the present invention.

Figure 5 is a schematic cross-sectional view of Figure 4.

Figure 6 is a schematic cross-sectional view of the A-A position in Figure 5.

Figure 7 is a combined schematic diagram of Figure 5.

Figure 8 is a schematic diagram of the position of the radiation unit when the bolt and the lock base of the present invention are locked.

Figure 9 is a schematic diagram of the electromagnetic wave operation of the standard dipole antenna model of the present invention.

As shown in Figure 4, 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 close the container door bolt C, so that the customs host can monitor whether the container door bolt C is opened normally.

Please refer to Figures 1 to 7, the plug A is composed of a circuit device 20 installed inside a plug 10; wherein;

The bolt 10 is made of a conductive metal material, and has a rod body 11, a cap head 12 that expands outwardly at the top of the rod body 11, a downwardly opening receiving hole 13, and a buckle 14 that is concave on the outer circumference of the lower part of the rod body 11. The receiving hole 13 is axially arranged along the rod body 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 connects 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, a spray material or a wire. It is defined by a front surface 20A and a back surface 20B opposite to the front surface 20A, so that it can be inserted into the receiving hole 13 from bottom to top, and then completely embedded in the hole body 133. The fixing method is between the front surface 20A and one side of the hole body 133. A male plug 211 is provided, and a female plug 212 is provided between the back surface 20B and the other side of the hole body 133, and the circuit device 20 is provided with a through hole 213 for the 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 line 222 is provided at the top of the circuit device 20, and a bridge line 223 is provided between the lower contact 221 and the middle point of the matching line 222, so that the matching line 222 and the bridge line 223 can be longitudinally connected in a large range. Arranged at a position relative to the shaft 11, the shaft 11 can interrupt the main circuit 22 when it is cut to meet the need to open 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, which is convenient for the following operation; the main circuit 22 and the radiation unit 23 are electrically connected to an RFID chip 24 to form a radio frequency circuit (Radio Frequency Circuit). The RFID chip 24 is installed on the top edge of the front 20A and has a main signal pin 241 connected to one end of the matching line 222, a secondary signal pin 242 connected to the other end of the matching line 222, and a fixed pin 243 for providing auxiliary support;

The circuit device 20 has a hole-shaped conductive portion 25 passing through the top edge. The conductive portion 25 has a front conductive wire 251 connected to one end of the matching line 222 at the front end, and a rear conductive wire 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 and the lower contact 221 to maintain an isolation zone 26 as shown in FIG. 3, so as to avoid the radiation unit 23 and the lower contact 221 from being electrically connected. 21 forms a short circuit. It is particularly noted that the main circuit 22, the RFID chip 24 and the conductive part 25 cannot be directly electrically connected to the plug 10 to prevent the circuit device 20 from sending out signals due to the accidental contact with the plug 10. The present invention mainly controls the area parameter of the planar radiation unit 23 and the relative position parameter of the planar radiation unit 23 in 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 plug 10 constitutes a monopole antenna on 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, and is used to transmit the electromagnetic wave signal to reach the hole 133 of the electrical connection bolt 10. At this time, the upper monopole antenna cannot directly activate the RFID chip 24 due to the low gain. It should be specially stated here that when the area of the radiation unit 23 exceeds the area parameter, it will directly form an antenna effect. At this time, the signal of the RFID chip 24 will be blocked in the metal hole 13 and cannot be received and sent 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 still cannot receive and send signals through the bolt 10;

The lock base B is composed of an outer shell 30, a base 40, a lower buckle 50 and a lower monopole antenna 60;

The outer shell 30 is generally cylindrical and has a box chamber 31 that is concave from bottom to top and a lock hole 32 that extends upward from the top of the box chamber 31. The lock hole 32 has a diameter 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 through a bottom cover 34;

The base 40 is fixed in the chamber 31 so that it is positioned between the shoulder 33 and the bottom cover 34. The base 40 is connected to the first hole 41, the second hole 42, the third hole 43, and the fourth hole 44 coaxially arranged with the lock hole 32 from top to bottom. The diameter of the second hole 42 is controlled to be equal to the diameter of the lock hole 32 for the bottom end of the bolt 10 to be inserted. The diameter of the first hole 41 is larger than the diameter of the second hole 42 for providing installation for the lower buckle 50 described later. The diameter of the third hole 43 is controlled to be smaller than the diameter of the second hole 42. As for the diameter of the fourth hole 44, it is larger than the diameter 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 baffle 51 and a retaining ring 52. The baffle 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 is gradually expanded downward. The retaining ring 52 is installed within the range of 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, so that the retaining ring 52 can limit the bolt 10 from escaping from the lock seat B;

The lower monopole antenna 60 is composed of a spring 61 mounted on the fourth hole 44 and a slider 62 slidably matched in the third hole 43. The spring 61 is in contact between the bottom cover 34 and the bottom of the slider 62. The bottom of the slider 62 has a flange 621 extending radially outward, so that the spring 61 provides a preload to the slider 62, urging the flange 621 of the slider 62 to stop at the top of the fourth hole 44, so as to control the top of the slider 62 to remain suspended and positioned in the second hole 42 at any time, so that it can be inserted into the sleeve area H and match the lower contact 221;

Please refer to Figures 4 to 7. When the lower portion of the bolt 10 is inserted into the lock hole 32 to lock the container door bolt C, the top of the slider 62 will relatively enter the locking area H and abut the lower contact 221 during the process of the lower portion of the bolt 10 being inserted into the lock hole 32. Then, the preload of the spring 61 is overcome to allow the lower portion 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 at the locking area. The lower buckle 50 is used to lock the bolt 10 to the lock seat B and prevent it from coming out, 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 form the lower monopole antenna 60 for activating the RFID chip 24, thereby amplifying the upper monopole antenna, so that the upper monopole antenna and the lower monopole antenna 60 are combined into a standard dipole antenna as shown in Figures 8 and 9. Antenna) to send out RFID frequency band or microwave frequency band signals that can be recognized 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 break the bolt 10 from the middle to cut off the main circuit 22 and thus interrupt the signal. It is particularly explained here that the present invention can be used through the The area parameter setting and the distance parameter setting of the lower contact 221 and the top of the lower monopole antenna 60 are used to control the lower contact 221 and the top of the lower monopole antenna 60 to produce a coupling feedback effect without contact when the bolt 10 locks the lock seat B, so that the lower contact 221 transmits an electromagnetic wave signal to the top of the lower monopole antenna 60, thereby electrically connecting them to each other.

The present invention does have the following advantages:

1. The present invention controls the radiation unit to produce a coupling feed-back effect with the hole of the bolt to transmit electromagnetic wave signals, so that the bolt forms a monopole antenna on the circuit device. This technology allows the circuit device to be made without direct electrical connection to the bolt, so the circuit device of the previous case needs to go through the side copper plating process, and the separation structure between the circuit device and the upper cover of the previous case is simplified, and the requirement that the bolt of the front case must be sealed to the upper cover is eliminated. Therefore, this case is more economical than the previous case.

2. Please refer to Figures 8 and 9. The present invention can easily control the radiation unit and the bottom edge of the hole body to produce a coupling feedback effect, so that the bolts form an upper monopole antenna, which can form a standard dipole antenna mode when used with the lower monopole antenna. In contrast, the previous proposal 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.

3. In addition to completely hiding the lower contact of the circuit device in the bolt receiving hole, the present invention also controls the lower contact and the bottom of the receiving hole to maintain a locking area. This configuration can indeed eliminate the problem of the circuit device being easily pulled out and accidentally triggering a signal. In addition, during the process of the bolt locking the seat, the top of the lower monopole antenna is controlled to relatively enter the locking area, so that the lower monopole antenna and the lower contact can be electrically connected. The overall configuration is quite reasonable and has great industrial applicability and advancement.

Fourth, the present invention uses the spring directly as the lower monopole antenna, so that the spring not only provides the pre-stress 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; in addition, 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, so that the material volume and manufacturing cost of the lock seat can be greatly reduced.

A: Plug in

10: Bolts

11:Shaft

12: Hat head

131: Hole top

133: Hole

14: Upper buckle

20: Circuit device

20A: Front

214: Tips

22: Main circuit

221: Lower contact

222: Matching line

223: Bridge line

24: RFID chip

241: Main signal pin

242: Auxiliary signal pin

243: Fixed foot

B: Lock seat

30: Shell

31: Box Room

32: Keyhole

33: Shoulders

34: Bottom cover

40: Base

42: Second hole

43: The third hole

44: The fourth hole

50: Lower buckle

51:Block ring

512: Push-pull hole

52: Buckle

61: Spring

62: Slider

621: Sudden Edge

C: Door bolt

Claims (8)

A coupled electronic seal, which at least includes: A plug, which is composed of a bolt and a circuit device; the bolt has an upper buckle and a receiving hole capable of installing the circuit device, the receiving hole defines a hole body arranged along the axial direction, and further defines a hole bottom connecting the inside and the 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 feed effect with the hole body of the bolt, so that the bolt constitutes the upper monopole antenna of the circuit device: A lock base with a lower monopole antenna installed, which has a lock hole for the lower part of the bolt to be inserted, and a lower buckle for the upper buckle to be positioned, so that the bolt can be locked on the lock base, and the lower monopole antenna is controlled to be electrically connected to the lower contact point, thereby activating the RFID chip, so that the upper monopole antenna and the lower monopole antenna can form a dipole antenna. As in the coupled electronic seal of claim 1, 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 aperture, the radiation unit is used to generate a frequency response with the aperture body when not in contact with the aperture body, so as to achieve a coupled feedback effect. As in the coupled electronic seal of claim 1, the radiation unit generates a coupled feedback effect with the bottom edge of the aperture body, so that the upper monopole antenna and the lower monopole antenna can form a dipole antenna with a standard configuration when enabled. For example, in the coupled electronic seal of claim 1, 2 or 3, the circuit device is defined as a front side and a back side opposite to the front side, the front side is provided with the main circuit, and the main circuit is provided with a lower contact at the bottom of the circuit device; the back side is provided with the radiation unit, and the radiation unit and the lower contact are controlled to maintain an isolation zone. For example, in the coupled electronic seal of claim 4, the main circuit has a matching circuit at the top of the circuit device, and a bridge circuit 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 also has a conductive part, which is connected to a front conductive line connected to one end of the matching circuit and a rear conductive line connected to the radiation unit. For the coupled electronic seal of claim 1, 2 or 3, the lower contact and the top of the lower monopole antenna are set by area parameters and spacing parameters to control the lower contact and the top of the lower monopole antenna to produce a coupling feedback effect without contact when the bolt locks the lock seat, thereby electrically connecting them to each other. For the coupled electronic seal of claim 1, 2 or 3, 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. For the coupled electronic seal of claim 1, 2 or 3, 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 a pre-stress 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.

Images