Electronic seal with spring type antenna

Abstract

The anti-theft lock comprises a plug and a lock seat, wherein the plug consists of a plug piece and a circuit device; the bolt piece is provided with an upper buckle and a containing hole provided with the circuit device. The circuit device is provided with an RFID chip and a lower contact; the lock seat is provided with a lower monopole antenna, a lock hole for inserting the lower part of the bolt piece, and a lower buckle for positioning the upper buckle, so that the bolt piece can be locked on the lock seat, and the lower monopole antenna is controlled to be electrically connected with the lower contact to start the RFID chip; the lower polar antenna is composed of at least one spring, and the spring is installed at the position corresponding to the lock hole, provides pre-pressure for electrical connection between the lower polar antenna and the lower contact, and controls the spring to be matched with a frequency band monitored by a customs host. According to the electronic seal with the spring type antenna, the spring is used as the single-pole antenna under the electronic seal, economic benefits are met, the assembling accuracy is effectively improved, high quality is maintained, and automatic production can be achieved.

Description

Technical Field

[0001] The invention relates to the field of electronic seals, in particular to an electronic seal with a spring antenna. Background Art

[0002] The prior art, such as the US patent US010510272 which has been granted to the present applicant, has the following disadvantages after market feedback: 1. The lower monopole antenna of the front case is composed of an aluminum sticker pasted to the slider of the lock seat, and then the slider is pressed by a spring to maintain the electrical connection with the circuit board of the bolt. The aluminum sticker must be manually adjusted and pasted to the slider, which is not only very time-consuming, but also the efficiency of pasting the aluminum sticker cannot be improved, and it is even more difficult to increase economic benefits. This is the point where the current production technology cannot break through. It is specially explained here that the spring of the front case is not the lower monopole antenna, it only provides the slider with pre-pressure.

[0003] Second, in the previous case, when the aluminum sticker is manually pasted to the slider, since the aluminum sticker is very thin, it is very easy to break and wrinkle during the pasting process. In addition, manual labor is inevitably prone to carelessness, emotional instability or lack of technical skills, resulting in the aluminum sticker not being pasted in the correct position, so the quality is difficult to control. As a result, when the electronic seal is used for customs clearance, the customs host may be unable to read or difficult to read, which is very troublesome for users.

[0004] 3. During the production of the aluminum sticker of the previous case, a large amount of release paper that needs to be discarded will be generated, which will inevitably cause environmental problems, and the material cost of the aluminum sticker also has the problem that it cannot be further reduced.

[0005] Fourth, the aluminum sticker of the front case needs to have a certain length to match the length of the bolt and the frequency band of the customs host, so the slider of the lock seat needs to provide enough area for the aluminum sticker to stick on. As a result, the volume of the lock seat cannot be effectively reduced, resulting in the inability to fully reduce the material cost of the lock seat.

[0006] 5. The above case is for locking the bolt hole of the container door bolt. When the container is transported, the bolt will inevitably rotate within the bolt hole due to the force generated by the transportation, so the lock seat and the aluminum sticker will also be driven by the bolt and rotate together. However, since the aluminum sticker is not symmetrically arranged around the central axis of the bolt and the lock seat, the aluminum sticker will inevitably be relatively close to or relatively far from the container door, causing the frequency of the lower monopole antenna to be extremely unstable, resulting in the disadvantages of difficulty in reading or insufficient reading distance when passing through the customs host. In particular, when the customs host adopts the European standard frequency band with an extremely narrow bandwidth, this disadvantage is more serious. Summary of the invention

[0007] To solve the above problems, the present invention provides an electronic seal with a spring antenna that uses a spring as a monopole antenna under an electronic seal, which is economically efficient, effectively improves assembly accuracy, maintains high quality, and can be automatically produced.

[0008] The electronic seal with a spring antenna of the present invention mainly comprises: 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 circuit device is provided with an RFID chip and a lower contact; 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 is provided with 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 to the lower contact to activate the RFID chip; 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 a pre-pressure for the electrical connection between the lower monopole antenna and the lower contact, the spring is further controlled to be sufficient to match the frequency band monitored by the customs host.

[0009] After adopting the above scheme, through the overall configuration of the plug, lock seat, lock hole and spring, the lower monopole antenna can be automatically installed to the predetermined position of the lock seat. It is naturally more convenient and faster than the previous case disclosed above, which requires too much manual work in the production process, and greatly improves the production efficiency, making the present invention economically progressive; removing the process of manually pasting the lower monopole antenna, its accuracy is bound to be better than the conventional manual pasting, and it can avoid product defects caused by manual haste, carelessness, negligence, emotional instability or lack of technical skills; in addition to greatly saving labor hours and improving efficiency, the present invention can also achieve economic principles and effectively improve quality under automated production, thereby greatly improving the defects of the previous case disclosed above, and indeed provides a novel technology for manufacturing electronic seals with an effective solution.

[0010] Furthermore, the spring matches the frequency band monitored by the customs host by controlling its total length, which is the size of the spring when it is stretched into a straight line.

[0011] Furthermore, the total length of the spring and the frequency band of the customs host are set to one eighth of the wavelength.

[0012] Furthermore, the spring is a compression coil spring, and the compression coil spring and the bolt are arranged on the same central axis, so that the compression coil spring is symmetrically arranged around the central axis of the bolt.

[0013] Furthermore, the circuit device is provided with a main circuit, the main circuit is provided with a lower contact at the bottom of the circuit device, a matching circuit is provided at the top of the circuit device, and a bridge circuit is provided between the lower contact and the midpoint of the matching circuit, and 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.

[0014] Furthermore, the circuit device is fed into the bolt so that the bolt forms an upper monopole antenna matched with the lower monopole antenna, thereby forming a dipole antenna mode.

[0015] Furthermore, the lower contact is located in the receiving hole, and a locking area is maintained between the lower contact and the bottom end of the receiving hole, and the top end of the lower monopole antenna is suspended in the locking hole so that when the bolt is locked in the lock seat, the top end of the lower monopole antenna can pass through the locking area relatively and then be electrically connected to the lower contact.

[0016] Furthermore, the lower monopole antenna has a slider which is slidably matched with the lock seat, so that the spring links the slider and controls the slider to be suspended and positioned in the lock hole to provide electrical connection for the lower contact.

[0017] The present invention controls the spring and the bolt to be arranged on the same central axis so that the spring is symmetrically arranged around the central axis of the bolt, so that the spring will not change the relative position of the lower monopole antenna to the container door due to the rotation of the bolt and the lock seat. Therefore, it can effectively improve the disadvantage of the easy deviation of the previous case disclosed above, so that the customs host can read more smoothly, and the accuracy of the present invention is sufficient to provide both European and American customs host monitoring. Therefore, the present invention has the advantages of high precision and wide application range. In addition to completely hiding the lower contact of the circuit device in the bolt hole, the present invention controls the lower contact and the bottom of the hole to maintain a locking area. Such a configuration can eliminate the problem of the previous case circuit device being easily pulled out and erroneously triggering a signal. Moreover, in the process of locking the bolt and the lock 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 advancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the decomposition of the present invention.

[0019] Figure 2 It is a front schematic diagram of the circuit device of the present invention.

[0020] Figure 3 It is a schematic diagram of the back side of the circuit device of the present invention.

[0021] Figure 4 It is a schematic diagram of the positions of the bolt, the lock seat and the door bolt of the present invention.

[0022] Figure 5 yes Figure 4 Schematic cross-section diagram of .

[0023] Figure 6 yes Figure 5 Schematic diagram of the cross section at the AA position.

[0024] Figure 7 yes Figure 5 Schematic diagram of the combination.

[0025] Figure 8 It is a schematic diagram of the position of the radiation unit when the bolt and the lock base are locked.

[0026] Fig. 9 It is a schematic diagram of the electromagnetic wave operation of the standard dipole antenna mode of the present invention.

[0027] 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

[0028] 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.

[0029] 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, 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. The aforementioned area parameters and relative position parameters are set by those skilled in the art according to the adaptability of the 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. At this time, 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 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. The bottom of the box chamber 31 can be closed by installing 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 keep suspended and positioned in the second hole 42 at any time, so that it can match the lower contact 221 relative to the insertion sleeve area H; it is particularly explained here that the present invention further defines that the spring 61 is a compression coil spring, and the compression coil spring and the bolt 10 are arranged on the same central axis, so that the compression coil spring is symmetrically arranged around the central axis of the bolt 10, so that the compression coil spring does not The position of the lower monopole antenna 60 relative to the container door will change due to the rotation of the bolt 10 and the lock seat B. More importantly, the present invention further controls the total length of the spring 61 to match the frequency band monitored by the customs host. The total length is the size of the spring 61 when it is stretched into a straight line. Specifically, the total length of the spring 61 and the frequency band of the customs host are set to one-eighth of the wavelength. Further, the wavelength is the speed of light divided by the frequency of the customs host. When the monopole antenna is in the air without metal shielding, its optimal frequency response is one-quarter of the wavelength. However, the present invention is used on a container door with a large metal surface, so that the frequency response of the lower monopole antenna 60 is offset to about one-eighth of the wavelength. Because the spring 61 will not be offset with the rotation of the bolt 10 and the lock seat B, a fixed frequency response can be obtained, and its bandwidth is sufficient to cover the frequency bands of the US and European customs hosts.

[0030] 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. 9The 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 uses the overall configuration of the plug, the lock seat, the lock hole, and the spring to automatically install the lower monopole antenna to the predetermined position of the lock seat. This is naturally more convenient and faster than the previous case disclosed above, which requires too much manual work during the production process, greatly improves production efficiency, and makes the present invention progressive and economically beneficial.

[0032] Second, the present invention eliminates the process of manually pasting the monopole antenna, so its accuracy is definitely better than the conventional manual pasting, and avoids product defects caused by manual haste, carelessness, negligence, emotional instability or lack of technical skills.

[0033] 3. The present invention controls the spring and the bolt to be arranged on the same central axis so that the spring is symmetrically arranged around the central axis of the bolt, so that the spring will not change the position of the lower monopole antenna relative to the container door due to the rotation of the bolt and the lock seat. Therefore, it can effectively improve the disadvantage of easy deviation of the above-mentioned previous case, and the accuracy of the present invention is sufficient to provide both European and American customs host monitoring. Therefore, the present invention has the advantages of high precision and wide application range.

[0034] Fourth, 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 to maintain a locking area between the lower contact and the bottom of the receiving 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.

Claims

1. An electronic seal with a spring antenna, 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 circuit device is provided with an RFID chip and a lower contact; A lock base with a lower monopole antenna installed thereon, which has a lock hole for the lower part of the bolt to be inserted into, and is provided with 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 to the lower contact to activate the RFID chip; 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.

2. The electronic seal with a spring antenna according to claim 1, characterized in that: The spring matches the frequency band monitored by the customs host by controlling its total length, which is the size of the spring when stretched into a straight line.

3. The electronic seal with a spring antenna according to claim 2, characterized in that: The total length of the spring and the frequency band of the customs host are set to one eighth of the wavelength.

4. The electronic seal with a spring antenna according to claim 1, 2 or 3, characterized in that: The spring adopts a compression coil spring, and the compression coil spring and the bolt are arranged on the same central axis, so that the compression coil spring is symmetrically arranged around the central axis of the bolt.

5. The electronic seal with a spring antenna according to claim 1, 2 or 3, characterized in that: The circuit device is provided with a main circuit, the main circuit is provided with a lower contact at the bottom of the circuit device, a matching circuit is provided 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.

6. The electronic seal with a spring antenna according to claim 1, 2 or 3, characterized in that: The circuit device is fed into the bolt so that the bolt forms an upper monopole antenna matched with a lower monopole antenna, thereby forming a dipole antenna mode.

7. The electronic seal with a spring antenna according to claim 1, 2 or 3, characterized in that: The lower contact is located in the receiving hole and has a locking area between it and the bottom of the receiving hole, and the top of the lower monopole antenna is suspended in the locking hole 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 electronic seal with a spring antenna according to claim 1, 2 or 3, characterized in that: The lower monopole antenna has a slider which is slidably matched with the lock seat, so that the spring links the slider and controls the slider to be suspended and positioned in the lock hole to provide electrical connection for the lower contact.

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