TW201307659A - Plug assembling method of electronic seal and structure thereof - Google Patents

Abstract

A plug assembling method of electronic seal comprises steps of: (A) preparing a plug body, the plug body comprising a shaft having a bottom end for insertion into a plug seat, a borehole extending through the bottom end of the shaft, a first retention section provided in the borehole; (B) preparing a circuit unit having a control circuit, the control circuit being composed of circuit wiring, a lower contact point, and an RFID chip; (C) preparing an inner bar having a second retention section, to make the circuit unit being mounted first in the inner bar, followed by inserting the inner rod with the circuit unit mounted therein into the borehole from the bottom end of the shaft and making the first and second retention section collectively positioning the inner bar so that when the shaft is inserted into and cannot detach from the plug seat, the lower contact point to actuates the control circuit of the circuit unit. The plug so assembled allows the inner bar and the circuit unit to be directly and forcibly pulled out of the borehole from the bottom when the plug fails tests, and a new set of inner bar and circuit unit can be set in place. Such a replacement method is extremely useful for industrial applications.

Description

Plug method for electronic seal and its structure

The present invention is specifically directed to a plug for an electronic seal, and more particularly to a special technique in which the inner rod is inserted from the bottom end of the plug body.

Our application No. 099142305 discloses a new type of electronic seal, the plug (10) having a specific structure as shown in the first and second figures, comprising: a plug body (11) having a shaft (111), a cap (112) radially outwardly extending from the top end of the shaft (111), a bore (113) extending axially through the shaft (111) and the cap (112), and a radial expansion of the bore (113) a top hole (113A), a set of collars (114) fitted to the outer circumference of the shaft (111); a flexible circuit board (12) having a control loop, the control loop It consists of a printed circuit (121), a lower contact (122), and an RFID chip (123); an inner rod (13), the circuit board (12) is mounted on the inner rod (13), and then the inner rod (13) Inserting into the bore (113) from the top end of the plug body (11), the inner rod (13) has a shaft portion (131) limited to the bottom of the countersink (113A) and a shaft portion of the joint end (131) ( 132), so that the bottom end of the shaft portion (132) protrudes below the hole (113), and the contact point (122) of the circuit board (12) is located at the bottom end of the shaft portion (132); 14), after the inner rod (13) is installed to the bore (113), the upper cover (14) can be closed to the countersunk head (113A), and the upper cover (14) the bottom surface abuts against the top end of the inner rod (13) (131); a plastic waterproof sleeve (15) which is thermoformed and covers the upper half of the plug body (11) for airtight closing collar (114), the upper cover (14) and the countersink (113A), and the bottom edge of the waterproof cover (15) forms a dense interface (151) which is gradually diverged downward.

The plug (10) consisting of the plug body (11), the circuit board (12), the inner rod (13), the upper cover (14) and the waterproof sleeve (15), and the lower half of the plug body (11) Inserted into a shaft hole (21) of a socket (20), and the bolt body (11) is fixed in the shaft hole (21) and cannot be disengaged, and the bolt seat (20) has a flexible interface (151). The mating horn (22) is such that the combined plug (10) and the socket (20) can meet the requirements of waterproofing; the plug (20) is further provided with an antenna (30) inside the plug body. (11) After inserting the shaft hole (21), the antenna (30) can be electrically connected to the RFID chip (123), so that the identification host installed by the customs can quickly recognize and manage the container function, however, After the normal exit and want to open the container, it only needs to cut the plug (10) to make the printed circuit (121) open, so that the antenna (30) and the RFID chip (123) can be interrupted. Electrical connection status.

However, when I made the plug (10), I found the following problems to be overcome:

1. The circuit board (12) and the inner rod (13) are pre-installed in the hole (113) of the plug body (11), and then the waterproof sleeve (15) is thermoformed on the plug body (113). The assembly sequence causes the RFID chip (123) to withstand the temperature of the waterproof sleeve (15) at the thermoforming temperature, causing the RFID chip (123) to fail, and the RFID chip (123) is actually found by the inventors. The damage situation is as high as 10%, which not only reduces the production efficiency, but also the material cost and the labor cost are unnecessarily degraded, which is very troublesome.

2. When the test board (12) fails, and a new circuit board (12) has to be replaced, it must be disassembled in a waterproof case → remove the cover and other procedures, and the new circuit board is replaced. After that, it is necessary to re-form a waterproof jacket (15). This type of replacement not only accumulates working hours due to the increase in the number of movements, but also makes it difficult to increase the economic benefits. This is where the current processing technology cannot break through.

In view of the problem that the RFID chip or the circuit board has a high defect rate due to the assembly of the conventional plug, and the replacement of the circuit board has the disadvantages of time and labor, so that the cost of the plug can not be further reduced, the inventors have years of professional experience and experience. The invention has been developed through continuous conception and research.

The main object of the present invention is to provide a method for assembling a plug of an electronic seal, which forcibly combines the shape of the inner rod together with the circuit unit, and can only be inserted into the hole through the bottom end of the plug body, and the plug body and the inner rod are preset. The first and second buckles are positioned, and the structure is configured such that the plug body can be thermoformed before the inner rod and the circuit unit are installed. The reverse change of the assembly method can make the RFID chip on the circuit unit of the invention not to withstand the temperature of the thermoforming of the waterproof sleeve, thereby greatly improving the damage of the conventional RFID chip or the circuit unit, and further, after assembly. When the plug has poor test, the invention can directly force the inner rod and the circuit unit to be pulled out from the bottom end of the hole without disassembling the waterproof sleeve and the upper cover, so that the new set of inner rods and circuit units can be replaced again. Therefore, the assembly method of the present invention can eliminate the problem of conventional assembly, effectively improve the quality, improve the production efficiency, and indeed provide an effective solution for the plug assembly of the electronic seal.

Another object of the present invention is to provide a plug for an electronic seal, which mainly controls the overall shape of the inner rod after mounting the circuit unit so as to be inserted into the hole through the bottom end of the plug body, and the plug body and the inner rod are further provided. The first and second fastening portions are matched for positioning the inner rod. The structural arrangement is such that the plug body of the present invention can be thermoformed with a waterproof sleeve before the inner rod and the circuit unit are installed, thereby improving the damage of the conventional RFID chip. And the shortcomings that are not easy to replace.

Please refer to the third to ninth drawings. The "Electrical Seal Plug (40) Assembly Method" of the present invention includes:

(A) Preparing a conductive plug body (41): Please refer to the third and sixth figures. The plug body (41) has a shaft (411) and a radial extension to the shaft (411). a top cap (412), a bore (413) axially extending through the shaft (411) and the cap (412), and a collar (414) fitted to the outer circumference of the shaft (411), The top edge of the bore (413) has a countersunk hole (413A) having a larger aperture, and the countersink (413A) forms a first buckle and a radial expansion at the top edge of the countersunk (413A). a positioning hole (413B), the positioning hole (413B) can be closed by a magnet (415), and the outer side of the bottom edge of the shaft (411) is mounted with a buckle (416) with an outer diameter protruding; As shown in the third, fifth and sixth figures, the upper part of the plug body (41) is more thermoformed with a plastic waterproof cover (42) which is capable of airtightly covering the collar (414) and the upper cover ( 415), and forming a downward diverging dense interface (421) at the bottom edge;

(B) preparing a circuit unit (43): as shown in the third figure, the circuit unit (43) has a control loop, which is a circuit wiring (431) punched by a conductive plate, a connecting circuit a contact (432) under the wiring (431), a contact (433) on a communication circuit wiring (431), and an RFID chip (434) assembled in the circuit wiring (431);

(C) Preparing an insulated inner rod (44): Referring to the fourth figure, the inner rod (44) has a shaft portion (441) and a second buckle portion connected to the top end of the shaft portion (441). The two buckle portions are formed by a connecting piece (442) which bends the connecting shaft portion (441) outwardly, a buckle piece (443) at the top end of a protruding connecting piece (442), an extending piece (444) of a longitudinal connecting shaft portion, and a The elastic piece (445) is arranged on the top of the extending piece (444), and the connecting piece (442) and the extending piece (444) are arranged in a bifurcation so as to have the potential to open outward at any time, and the circuit unit is (43) The circuit wiring (431) is adhered to the shaft portion (441) of the inner rod (44) such that the lower joint (432) is located at the bottom end of the shaft portion (441), and the upper joint (433) is located at the upper elastic sheet. (445), and then, as shown in the sixth figure, the connecting piece (442) is closed toward the extending piece (444), so that the inner rod (44) of the mounting circuit unit (43) has an overall shape sufficient by the plug body (41) The bottom end is inserted into the hole (413). As shown in the seventh figure, when the lower buckle piece (443) reaches the position of the countersink (413A), the connecting piece (442) can be moved away from the extending piece (444). ) the direction is opened so that the lower cleat (443) can be buckled into the sinking hole (413A) In a buckle, at the same time, the top edge of the upper elastic piece (445) can abut against the bottom surface of the upper cover (415), so that the inner rod (44) can be positioned so that the inner rod (44) is not restricted by the hole ( 413) The bottom end is disengaged, and the bottom end of the shaft portion (441) and the lower contact point (432) of the circuit unit (43) protrude below the hole (413) to maintain a protruding amount (A), and the control is located on the upper elastic piece. (445) The upper contact (433) is not electrically connected to the upper cover (415) such that when the plug (40) is not inserted into the socket (20), the plug body (41) is not formed with the RFID chip ( 434) External antenna for electrical connection.

Please cooperate with the third, eighth and ninth views. After the lower half of the plug body (41) of the present invention is inserted into the shaft hole (21) of the bolt seat (20), the bottom end of the shaft portion (441) and the circuit unit (43) The lower contact (432) can be pressed against the bottom surface of the shaft hole (21) for reacting to push the inner rod (44) upward for a short distance, and the bottom end of the shaft portion (441) still retains the protruding bolt body (41). The state of the bottom end, but the amount of protrusion (B) is reduced to provide a predetermined elastic force for making the lower contact (432) and the bottom surface of the shaft hole (21) more stable to contact the antenna (30) At the same time, correspondingly increasing the area of the upper elastic piece (445) contacting the upper cover (415), so that the contact point (433) located above the upper elastic piece (445) can be electrically connected with the upper cover (415), so that the plug body (41) An external antenna is electrically connected to the RFID chip (434), and at the same time, the buckle (416) of the plug body (41) is coupled with the buckle seat (23) in the shaft hole (21) to make the plug body ( 41) The lower half is fixed in the shaft hole (21) and cannot be disengaged, and the horn (22) of the socket (20) is closely adhered to the waterproof sleeve (42) and the dense interface (421), so that The combined plug (40) and the socket (20) can meet the requirements of waterproofing, The base (20) is further provided with an antenna (30). The antenna (30) can be electrically connected to the RFID chip (434) through the lower contact (432) when the plug body (41) is inserted into the shaft hole (21). Connected so that the identification host installed by the Customs can achieve the function of identifying and managing the container. However, when the container is to be opened after normal customs clearance, it only needs to cut the plug body (41), and then The internal circuit wiring (431) is disconnected, so that the antenna (30), the RFID chip (434), and the plug body (41) can be electrically disconnected.

As described above, the "plug of electronic seal" is defined as: a conductive plug body (41) having a shaft (411) and a radially outwardly extending rod a cap (412) at the top of the body (411), a bore (413) extending axially through the shaft (411) and the cap (412), and a collar (414) fitted to the outer circumference of the shaft (411). The top edge of the bore (413) has a countersunk hole (413A) having a larger aperture, such that the countersink (413A) forms a first buckle of the plug body (41), and the countersink (413A) The top edge further has a positioning hole (413B) having a larger aperture. The positioning hole (413B) can be closed by a top cover (415) formed by a magnet, and the shaft body (411) is mounted on the outer periphery of the bottom edge. a protruding ring (416); the upper part of the plug body (41) is thermoformed with a plastic waterproof cover (42) capable of hermetically covering the collar (414) and the upper cover (415), and the waterproof cover ( 42) The bottom edge forms a downwardly divergent dense interface (421); a circuit unit (43) having a control loop, the control loop being a circuit wiring (431) punched by a conductive plate, a connecting circuit Wiring (432) under the wiring (431), a connecting circuit wiring (431) upper contact ( 433), an RFID chip (434) assembled in the circuit wiring (431); and an insulated inner rod (44) for providing the circuit unit (43) to be mounted, having a shaft portion (441) and a connection a second fastening portion at the top end of the shaft portion (441), the second fastening portion is formed by a connecting piece (442) that bends the connecting shaft portion (441) outwardly, and a buckle piece (443) at the top end of a protruding connecting piece (442). , an extension piece (444) longitudinally engaging the shaft portion, and a spring piece (445) attached to the top end of the extension piece (444), the connecting piece (442) and the extending piece (444) are bifurcated The setting is made to be able to open outward at any time, and the lower contact (432) of the circuit unit (43) is disposed at the bottom end of the shaft portion (441), and the upper contact (433) is located at the upper elastic piece (445). , as shown in the sixth figure, the connecting piece (442) is closed toward the extending piece (444), so that the inner rod (44) of the mounting circuit unit (43) has an overall shape sufficient to be inserted by the bottom end of the plug body (41). In the hole (413), as shown in the seventh figure, when the lower buckle piece (443) reaches the position of the countersink (413A), the connecting piece (442) can be automatically opened away from the extending piece (444). So that the lower buckle piece (443) can be buckled into the sinking head (413A) In the first buckle portion, at the same time, the top edge of the upper elastic piece (445) can abut against the bottom surface of the upper cover (415), so that the inner rod (44) can be positioned, so that the inner rod (44) is not caused by The hole (413) is disengaged, and the bottom end of the inner rod (44) and the lower joint (432) of the circuit unit (43) protrude from the bottom end of the plug body (41) to maintain a protruding amount (A), and the control is located at The upper contact (433) of the upper elastic piece (445) is not electrically connected to the upper cover (415), so that the lower half of the plug body (41) does not insert the plug seat (20), and the plug body (41) does not Forming an external antenna electrically connected to the RFID chip (434), but after the lower half of the plug (40) is inserted into the shaft hole (21) of the socket (20), the RFID chip (434) can be coupled to the socket ( 20) The internal antenna (30) is electrically connected, and the inner rod (44) can be pushed upward by a small distance, and the bottom end of the inner rod (44) still maintains the state of the bottom end of the bolt body (41). In order to provide a predetermined elastic force, the lower contact (432) and the bottom surface of the shaft hole (21) can more stably contact the antenna (30), and correspondingly increase the area of the upper elastic piece (445) contacting the upper cover (415). , so that the joint (433) on the upper elastic piece (445) can be matched with the upper cover (41) 5) making an electrical connection such that the plug body (41) is electrically connected to the RFID chip (434) to form an external antenna, and at the same time, the buckle body (416) of the plug body (41) is in the shaft hole (21). The buckle seat (23) is combined so that the lower half of the plug body (41) is fixed in the shaft hole (21) and cannot be disengaged, and the socket (22) of the bolt seat (20) and the waterproof sleeve (42) It is closely adhered to the dense interface (421), so that the combined plug (40) and the socket (20) can meet the requirements of waterproofing.

Please refer to the tenth and eleventh drawings for explaining that the lock bar (50) of the container can be held between the bolt seat (20) and the bolt (40) collar (414). Regardless of whether the plug (40) is located above the socket (20), or the plug (40) is in a state of use below the socket (20).

Please refer to the twelfth figure, which further illustrates that the connecting piece (442) and the extending piece (444) are arranged in a three-prong shape, so that the shape of the second fastening part can be arbitrarily changed, and only the body of the plug can be used. The first buckle portion is combined, and the second buckle portion can be detached from the first buckle portion when the second buckle portion is subjected to a certain pulling force toward the bottom end of the hole (413), which is the present invention.

Please refer to the seventh and thirteenth views. The plug body (41) of the present invention is further selected from a magnetic material, and the upper cover (415) is a magnet which can be used for the bolt seat (20) or the mounting bolt seat (20). The carrier (24) is provided with a triggering device (60), which can select the most common reed switch for inserting the plug (40) into the socket (20) without being able to retreat The plug (40) can be magnetically transmitted through the upper cover of the magnet (415), and the trigger device (60) is additionally turned on, so that the trigger device (60) can activate an external circuit correspondingly, so that the external circuit can reach the external circuit. Required monitoring function. Specifically, the external circuit may include: a GPS chip module, a display interface capable of indicating a state, a battery capable of supplying a GPS chip module and a display interface power source, thereby causing the trigger device (60) to activate the After the external circuit, the external circuit can receive the satellite signal and transmit a positioning signal to display the coordinates of the plug (40) and the socket (20), so that the container can be prevented from being lost and used. By the same token, the external circuit can also be a device that can achieve the light monitoring function.

According to the foregoing, the "integration method and structure of the plug of the electronic seal" has the following advantages:

1. The plug (40) of the present invention adopts the process of first forming a thermoformed waterproof sleeve, and then installing the inner rod (44) and the circuit unit (43). This assembly method is reversed from the previous patent application case. Such a change can prevent the circuit unit (43) and the RFID chip (434) from being subjected to the thermoforming temperature of the waterproof cover (42), thereby greatly improving the damage of the conventional RFID chip, so that the assembly process of the present invention is It can break through the problem of poor quality deterioration in reforms.

2. Even if the plug (40) of the present invention has a bad test condition, the present invention can directly form a protruding hole with a needle-nosed pliers or a vise without disassembling the waterproof sleeve (42) and the upper cover (415). The inner rod (44) of (413) is then pulled downward to close the connecting piece (442) toward the extending piece (444), so that the lower cleat piece (443) is separated from the countersink (413A). The first buckle portion, so that the inner rod (44) and the circuit unit (43) are disengaged from the hole (413) toward the bottom end, so that the new set of inner rods and circuit units can be replaced again, and the replacement is performed. Quite convenient and fast, the invention can indeed bring about a revolutionary high degree of creation and economic benefits.

3. The circuit wiring (431) of the circuit unit (43) of the present invention is mainly formed by punching a conductive plate, and the circuit wiring (431) is directly mounted on the inner rod (44) of the insulation, so that The circuit unit (43) is capable of producing the desired control, which is much more cost effective and lighter in weight than mounting the board directly on the inner pole.

In summary, the assembly process of the present invention has the high efficiency of replacement and high quality, and is a high-level creation of a technical concept, which should meet the requirements of a patent application, and apply in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the equivalent variations and modifications of the scope of the present invention should still be within the scope of the present invention.

(customized part)

(10). . . Plug

(11). . . Bolt body

(111). . . Shaft

(112). . . Hat head

(113). . . Hole

(113A). . . Shentou

(114). . . Collar

(12). . . Circuit board

(121). . . Printed circuit

(122). . . Lower contact

(123). . . RFID chip

(13). . . Inner rod

(131). . . Head end

(132). . . Shaft

(14). . . Upper cover

(15). . . Waterproof Case

(151). . . Secret interface

(20). . . Stitch

(twenty one). . . Shaft hole

(twenty two). . . Horn seat

(twenty three). . . Buckle

(twenty four). . . Carrier

(30). . . antenna

(50). . . Lock lever

(part of the invention)

(40). . . Plug

(41). . . Bolt body

(411). . . Shaft

(412). . . Hat head

(413). . . Hole

(413A). . . Shentou

(413B). . . Positioning hole

(414). . . Collar

(415). . . Upper cover

(416). . . Buckle

(42). . . Waterproof Case

(421). . . Secret interface

(43). . . Circuit unit

(431). . . Circuit wiring

(432). . . Lower contact

(433). . . Upper contact

(434). . . RFID chip

(44). . . Inner rod

(441). . . Shaft

(442). . . Connecting piece

(443). . . Bottom clip

(444). . . Extension piece

(445). . . Upper shrapnel

(A)(B). . . Prominent amount

(60). . . Trigger device

First and second figures: a schematic diagram of the structure of the patent application No. 099142305.

Third Figure: is an exploded schematic view of the present invention.

The fourth figure is a three-dimensional combination diagram of the inner rod and the circuit unit of the present invention.

Figure 5 is a schematic view of a partial combination of the present invention.

Fig. 6 is a schematic cross-sectional view showing the inner rod and the circuit unit of the present invention just inserted into the plug body.

Figure 7 is a schematic cross-sectional view showing the combination of the plug of the present invention.

The eighth figure is a schematic view of the action of the plug of the present invention mounted on the bolt seat.

Ninth view: A schematic cross-sectional view of a plug and a plug of the present invention.

Tenth and Eleventh drawings are schematic views of an embodiment of the present invention.

Twelfth Diagram: A schematic view of another embodiment of the inner rod of the present invention.

Thirteenth Diagram: A schematic view of still another embodiment of the plug of the present invention.

(20). . . Stitch

(twenty one). . . Shaft hole

(twenty two). . . Horn seat

(twenty three). . . Buckle

(30). . . antenna

(40). . . Plug

(41). . . Bolt body

(411). . . Shaft

(412). . . Hat head

(413). . . Hole

(413A). . . Shentou

(413B). . . Positioning hole

(414). . . Collar

(415). . . Upper cover

(416). . . Buckle

(42). . . Waterproof Case

(421). . . Secret interface

(43). . . Circuit unit

(432). . . Lower contact

(433). . . Upper contact

(434). . . RFID chip

(44). . . Inner rod

(441). . . Shaft

(442). . . Connecting piece

(443). . . Bottom clip

(444). . . Extension piece

(445). . . Upper shrapnel

Claims (10)

A method for assembling a plug of an electronic seal comprises the steps of: (A) preparing a plug body: the plug body has a bottom end capable of being inserted into the shaft of the bolt seat, and a hole penetrating through the bottom end of the shaft body, and is disposed in the body a first fastening portion in the hole; (B) a circuit unit is prepared: the control circuit is composed of a circuit wiring, a contact under the communication circuit wiring, and an RFID chip mounted on the circuit wiring; (C) preparing an inner rod: the inner rod has a second buckle portion matched with the first buckle portion, so that the circuit unit is first mounted on the inner rod, and then the inner rod of the mounted circuit unit can be bottomed from the shaft end The hole is inserted, and the inner rod is assembled by the first and second buckle portions, so that the lower joint can activate the control circuit of the circuit unit when the shaft is inserted into the socket and cannot be disengaged. According to the plug assembly method of the electronic seal of claim 1, the plug body is thermoformed on the body of the rod and is covered with a plastic waterproof cover, and the bottom edge of the waterproof sleeve is formed with a gas-tight combination with the seat. The secret interface. According to the plug assembly method of the electronic seal according to claim 1 or 2, the inner rod is an insulating material, and the circuit wiring of the circuit unit is punched out by a conductive plate, and the circuit wiring is directly Installed on the inner rod of the insulation. According to the plug assembling method of the electronic seal according to claim 1 or 2, after the first and second fastening portions are combined, the bottom end of the inner rod and the lower contact point of the circuit unit are protruded from the bottom end of the protruding hole. The plug of the electronic seal comprises: a plug body having a bottom end capable of inserting the shaft of the bolt seat, a hole extending through the bottom end of the shaft body, and a first buckle portion disposed in the hole; a circuit unit having a control loop formed by a circuit wiring, a contact under the communication circuit wiring, an RFID chip mounted on the circuit wiring, and an inner pole having a circuit unit mounted a shaft portion, a second buckle portion matching the first buckle portion, and the lower contact point of the circuit unit is located at the bottom end of the shaft portion, and the overall shape of the circuit unit and the inner rod is sufficient to be inserted into the hole through the bottom end of the shaft body And the second buckle portion can be combined with the first buckle portion for positioning the inner rod so that the lower joint can activate the control loop of the circuit unit when the shaft is inserted into the socket and cannot be disengaged. According to the plug of the electronic seal of the fifth aspect of the patent application, the bottom end and the lower contact of the shaft portion are protruded and positioned below the hole. According to the plug of the electronic seal of claim 5, an antenna is arranged inside the socket, and when the shaft is inserted into the socket and cannot be detached, the antenna can be electrically connected to the RFID chip through the lower joint. Connecting; the plugging system adopts a conductive material, and the control circuit of the circuit unit has another upper contact, the upper contact is connected to the circuit wiring, and the upper contact is not electrically connected with the plug body, but When the plug is inserted into the socket and cannot be detached, the upper contact connects the plug body, so that the plug body forms an external antenna electrically connected to the RFID chip, so that the external antenna can simultaneously act with the antenna inside the socket. . According to the plug of the electronic seal of claim 5, the plug system further selects a magnetic conductive material and additionally has a magnet, so that the plug can transmit magnetic permeability when the plug is inserted into the plug and cannot be detached. The additional opening and closing device fixes the triggering device outside the socket, so that the triggering device can activate an external circuit correspondingly, so that the external circuit can achieve the required monitoring function. According to the plug of the electronic seal of claim 5, the plug body forms a countersunk hole with a larger aperture at the top edge of the hole, so that the countersunk hole forms the first buckle of the plug body, and the countersunk head The top edge of the hole is further provided with a positioning hole having a larger aperture so as to provide an upper cover closure; the inner rod has a shaft portion and a second buckle portion connected to the top end of the shaft portion, and the second buckle portion is bent outwardly a connecting piece connecting the shaft portion, a buckle piece at the top end of the protruding connecting piece, an extending piece extending longitudinally to the shaft portion, and an elastic piece connected to the top end of the extending piece, the connecting piece and the extending piece are bifurcated Providing that after the connecting piece is closed toward the extending piece, the circuit unit and the inner rod can be inserted into the hole through the bottom end of the plug body, and the lower buckle piece is buckled into the first buckle formed by the countersunk hole. The top edge of the upper shrapnel abuts against the bottom surface of the upper cover. According to the plug of the electronic seal of claim 5, the plug body is covered with a plastic waterproof cover on the half of the body of the rod, and the bottom edge of the waterproof sleeve is formed with a dense interface capable of airtight combination with the seat.