An electronic tag

Abstract

The present invention belongs to the technical field of radio frequency identification, and specifically is an electronic tag, comprising a magnetic bar coil and an RFID chip; a shell is arranged outside the magnetic bar coil and the RFID chip, an end cap matched therewith is arranged at the open end of the shell, the outer diameter of the end cap is the same as that of the shell, and the thickness of the side wall of the end cap is greater than the thickness of the side wall of the shell, a protrusion is arranged at the open end of the end cap, the outer diameter of the protrusion is the same as the inner diameter of the shell, two groups of card slots are symmetrically arranged on the protrusion and the side wall of the open end of the shell, and card columns are inserted in the card slots; the present invention arranges a shell and an end cap that match each other, so that the end cap can be effectively fixed at the opening of the shell and achieve the effect of sealing it, which is convenient and quick, and also reduces the quality problems of the electronic tag caused by high-temperature sealing, thereby improving the production quality and service life of the electronic tag.

Description

Technical Field

[0001] The invention belongs to the technical field of radio frequency identification, in particular to an electronic tag. Background Art

[0002] RFID electronic tags are currently widely used in the fields of commodity logistics tracking, anti-counterfeiting, personnel identification, and automatic identification of animals and objects. There are various types of RFID electronic tags, and a standard tag is needed to meet the secondary development needs of users. Due to the needs of this market, it is necessary to produce tubular electronic tags as a standard part of the RFID industry.

[0003] There are also some technical solutions for electronic tags in the prior art, such as a Chinese patent with the patent number of 2006100239253, which proposes a tubular electronic tag, which includes a tubular shell, a magnetic bar coil, an RFID chip and a capacitor synthesis module, and a shockproof material. The magnetic bar coil, the RFID chip and the capacitor synthesis module are arranged in the tubular shell, and the shockproof material is filled in the space around the magnetic bar coil, the RFID chip and the capacitor synthesis module. The present invention can be used for subcutaneous injection of animals and various tags in animal husbandry, and can become a standard product in the RFID industry. A large number of users use this standard product for secondary development. The present invention is easy to use for users, economical and practical, and has a good market prospect.

[0004] However, the shell in the above technology adopts an inorganic glass tube sealing end. Since the sealing temperature is relatively high and the enameled wire on the magnetic rod in the glass tube is not resistant to high temperature, although the glass tube end can be melted by instantaneous heating with a laser beam, the heat does not have time to be transferred to other parts. The present invention uses a method in which the workpiece is rotated and instantly heated with a laser beam to melt the glass tube end and seal the end to complete the sealing. However, this method is difficult to operate, the sealing end is unstable, and there is a risk of damage to the parts inside the shell, thereby affecting the production quality and service life of the electronic tag.

[0005] In view of this, the present invention provides an electronic tag, which, by providing a shell and an end cover that cooperate with each other, enables the end cover to be effectively fixed at the opening of the shell and achieve the effect of sealing it. While being convenient and quick, it also reduces the quality problems of the electronic tag caused by high-temperature sealing, thereby improving the production quality and service life of the electronic tag. Summary of the invention

[0006] In order to make up for the shortcomings of the prior art, the present invention provides an electronic tag. By arranging a shell and an end cover that cooperate with each other, the end cover can be effectively fixed at the opening of the shell and achieve the effect of sealing the end. While being convenient and fast, it also reduces the quality problems of the electronic tag caused by high-temperature sealing, thereby improving the production quality and service life of the electronic tag.

[0007] The technical solution adopted by the present invention to solve its technical problems is: an electronic tag, including a magnetic bar coil and an RFID chip; the magnetic bar coil and the RFID chip are provided with a tubular shell outside, the open end of the shell is provided with a tubular end cap matched therewith, the outer diameter of the end cap is the same as the outer diameter of the shell, and the thickness of the side wall of the end cap is greater than the thickness of the side wall of the shell, a protrusion is provided on the inner wall of the open end of the end cap, the outer diameter of the protrusion is the same as the inner diameter of the shell, the protrusion and the side wall of the open end of the shell are symmetrically provided with two groups of connecting card slots, the card slots are interspersed with card columns matched therewith, and the length of the card columns is between the inner diameter length and the outer diameter length of the shell; when working, the shell in the prior art adopts an inorganic glass tube sealing end. Due to the high sealing temperature, the enameled wire on the magnetic bar in the glass tube is not resistant to high temperature. Although the glass tube port can be melted by instantaneous heating by a laser beam, the heat has not yet been transferred to other parts. The present invention uses a method in which the workpiece is rotated and heated instantly by a laser beam to melt the glass tube mouth to seal the head, but this method is difficult to operate, the head seal is unstable, and there is a risk of damage to the parts inside the shell, thereby affecting the production quality and service life of the electronic tag; while the electronic tag in the present invention is produced, first the rod coil and the RFID chip are installed inside the shell, then the protrusion of the end cover is inserted into the open end of the shell, and the protrusion is aligned and connected with the slot on the shell, then the card column is passed through the two connected groups of slots respectively, and the ends of the card column are respectively located in the slots on the shell, so that the card column can be respectively engaged with the protrusion and the shell, at this time, the end cover is effectively fixed at the opening of the shell under the limiting effect of the card column and the head seal is achieved, which is convenient and fast, and also reduces the quality problems of the electronic tag caused by high-temperature head sealing, further improving the production quality and service life of the electronic tag.

[0008] Preferably, a positioning groove with a circular cross-section is provided in the middle of the inner end of the end cover, a positioning rod is provided inside the end cover, and an elastic layer is wrapped on the side wall of the positioning rod. The inner end of the positioning rod is interference-fitted inside the positioning groove, and a slide groove matching with it is provided on the top surface of the clamping column corresponding to the outer end of the positioning rod. The outer end of the positioning rod is located inside the slide groove, and when the outer end of the positioning rod is in contact with the inner end side wall of the slide groove, the two ends of the clamping column are respectively located in the clamping groove on the shell; when working, by providing a positioning rod matching with the clamping column on the end cover When the card column moves from one group of card slots to the other group of card slots, the slide groove on the card column can gradually cooperate with the positioning rod fixed inside the end cover, so that the positioning rod slides relative to the slide groove. When the outer end of the positioning rod fits with the inner end side wall of the slide groove, the two ends of the card column can be effectively located inside the two card slots on the shell and play a certain positioning effect, preventing the card column from being insufficiently or excessively inserted into the card slot, resulting in the failure of fixing the shell and the end cover, thereby further improving the stability and effectiveness of the electronic tag during production.

[0009] Preferably, the cross-sectional shapes at both ends of the card column are respectively set to a trapezoidal shape, and the end of the card column gradually shrinks from the inside to the outside; when working, by setting the shapes of the two ends of the card column, the end of the card column gradually shrinks from the inside to the outside, thereby facilitating the easy and stable insertion of the end of the card column from the slot opening, reducing the situation where the card column and the slot are difficult to insert due to insufficient alignment during cooperation, and further improving the convenience of the electronic tag during production.

[0010] Preferably, inclined guide surfaces are respectively provided on both side walls of the outer end of the slide slot, and the guide surfaces make the slot opening of the slide slot gradually larger from the inside to the outside; during operation, in order to make the outer end of the slide slot on the clamping column more effectively and stably cooperate with the bottom end of the positioning rod, a guide surface that can gradually increase the slot opening is provided at the outer end of the slide slot, so that the positioning rod can stably enter the interior of the slide slot by sliding on the inclined guide surface, so that the positioning rod can cooperate with the slide slot more stably and effectively, further improving the stability and effectiveness of the electronic tag during production.

[0011] Preferably, the positioning rod is slidably connected to a pressure plate at one end close to the end cover opening, and a spring is provided between the inner end of the pressure plate and the inner end of the end cover; during operation, when the card column moves from the card slot on one side to the card slot on the other side, the inclined surface at the end of the card column can apply pressure to the pressure plate, so that the pressure plate is forced to slide toward the top of the positioning rod and apply pressure to the spring. After the card column and the card slots on both sides are matched, the pressure plate applies reverse pressure to the card column under the rebound force of the spring, so that the two ends of the card column can be effectively pressed on the bottom surface of the card slot and play a certain fixing effect, preventing the card column from moving in the card slot under the influence of the outside world and causing the connection between the shell and the end cover to fail, further improving the stability of the electronic tag during production and use.

[0012] Preferably, an inclined plate is provided on the side of the pressure plate away from the outer end of the slide groove, and the inclined plate is parallel to the inclined surface that cooperates with the end of the card column and the inclined plate; during operation, in order to enable the card column to more effectively drive the pressure plate to move upward during movement, an inclined plate is provided on one side of the pressure plate, so that the card column can drive the pressure plate to move through the full fit and extrusion of its own inclined surface and the inclined plate, thereby preventing the card column and the pressure plate from being stuck due to direct extrusion, thereby further improving the stability of the electronic tag during production.

[0013] Preferably, a sealing layer is pasted on the outside of the card slot, and the outer surface of the sealing layer is flush with the outer wall of the shell; when working, in order to improve the sealing effect of the chamber composed of the shell and the end cover, after the shell and the end cover are matched, the sealing layer coated with glue is pasted on the outside of the card slot to prevent external dust or moisture from entering the inside of the shell through the card slot, thereby greatly improving the protective effect of the chamber composed of the shell and the end cover on its internal structure. At the same time, since the outer surface of the sealing layer is flush with the outer wall of the shell, the sealing layer is prevented from protruding outside the shell and easily falling off due to external force interference, thereby further improving the stability of the electronic tag in use.

[0014] Preferably, the positioning groove is arranged in the form of a through hole, and when the bottom end of the positioning rod is in contact with the bottom surface of the slide groove, the top surface of the positioning rod is flush with the top end of the end cover; during operation, by setting the positioning groove in the form of a through hole, it is not only convenient for processing, but also convenient for the positioning rod to be inserted from the positioning groove notch outside the shell and assembled with it. At the same time, when the bottom end of the positioning rod is inserted to fit with the bottom surface of the slide groove, the top surface of the positioning rod is just flush with the top end of the end cover, preventing the top end of the positioning rod from protruding outside the end cover and being easily affected by external interference, thereby further improving the stability of the electronic tag during use.

[0015] Preferably, the length of the elastic layer is the same as the depth of the positioning groove, and the top of the elastic layer is flush with the top of the positioning rod; during operation, by shortening the length of the elastic layer, not only is material greatly saved, but it also makes it easier for the bottom end of the positioning rod that is not wrapped with the elastic layer to pass through the positioning groove. At the same time, when the bottom end of the positioning rod is inserted to fit with the bottom surface of the slide groove, the elastic layer can be just interference-fitted inside the positioning groove and have a limiting and fixing effect on the positioning rod, further improving the speed of electronic tags during production.

[0016] Preferably, the bottom end of the elastic layer is arranged to be funnel-shaped, and the outer diameter of the bottom end of the elastic layer is the same as the diameter of the positioning rod; during operation, by setting the bottom end of the elastic layer to be funnel-shaped and making a smooth transition between the bottom end of the elastic layer and the positioning rod, the bottom end of the elastic layer at the positioning rod can be more easily inserted into the positioning groove, thereby allowing the entire elastic layer to be more stably and conveniently installed in the positioning groove.

[0017] Preferably, the protrusion is arranged in a ring shape; when working, by arranging the protrusion in a ring shape, not only the overall strength of the protrusion is enhanced, and the protrusion cooperating with the outer shell is prevented from breaking under the influence of the outside world, but also the annular protrusion can fit more fully with the inner wall of the outer shell, so that the protrusion can more comprehensively seal the position where the outer shell and the end cover fit, further improving the protective effect of the chamber composed of the outer shell and the end cover on the internal structure.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention provides a shell and an end cover that cooperate with each other, so that the end cover can be effectively fixed at the opening of the shell and achieve the effect of sealing the end cover. While being convenient and quick, it also reduces the quality problems of the electronic tag caused by high-temperature sealing, thereby improving the production quality and service life of the electronic tag.

[0020] 2. The present invention provides a positioning column on the end cover that cooperates with the card column, so that the two ends of the card column can be effectively located inside the two card slots on the shell and play a certain positioning effect, preventing the card column from being insufficiently or excessively inserted into the card slot, resulting in the failure of fixing the shell and the end cover, thereby further improving the stability and effectiveness of the electronic tag during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 is an exploded schematic diagram of the present invention;

[0024] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0025] Figure 4 yes Figure 2 The enlarged view of point B in the middle;

[0026] Figure 5 It is a schematic diagram of the structure of the present invention;

[0027] In the figure: magnetic bar coil 1, RFID chip 2, shell 3, end cover 4, protrusion 41, card slot 42, positioning slot 43, card column 5, slide slot 51, guide surface 52, positioning rod 6, elastic layer 61, pressure plate 62, spring 63, inclined plate 64, sealing layer 7. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with the implementation methods.

[0029] like Figure 1-Figure 5 As shown, an electronic tag described in the present invention comprises a magnetic bar coil 1 and an RFID chip 2; a tubular shell 3 is provided outside the magnetic bar coil 1 and the RFID chip 2, and a tubular end cap 4 is provided at the open end of the shell 3 to match therewith, the outer diameter of the end cap 4 is the same as the outer diameter of the shell 3, and the thickness of the side wall of the end cap 4 is greater than the thickness of the side wall of the shell 3, a protrusion 41 is provided on the inner wall of the open end of the end cap 4, the outer diameter of the protrusion 41 is the same as the inner diameter of the shell 3, and two groups of communicating card grooves 42 are symmetrically provided on the protrusion 41 and the side wall of the open end of the shell 3, and the card groove 42 is interspersed with a card column 5 to match therewith, and the length of the card column 5 is between the inner diameter length and the outer diameter length of the shell 3; when working, the shell 3 in the prior art adopts an inorganic glass tube sealing end. Due to the high sealing temperature, the enameled wire on the magnetic bar in the glass tube is not resistant to high temperature. Although the glass tube end can be melted by instantaneous heating by a laser beam, the heat has not yet been transferred to other parts. The present invention adopts The workpiece is heated instantly by a laser beam while rotating, and the glass tube mouth is melted to seal the head, so that the sealing can be completed. However, this method is difficult to operate, the sealing head is unstable, and there is a risk of damaging the parts inside the shell 3, thereby affecting the production quality and service life of the electronic tag. When the electronic tag in the present invention is produced, the rod coil and the RFID chip 2 are first installed inside the shell 3, and then the protrusion 41 of the end cover 4 is inserted into the open end of the shell 3, and the protrusion 41 is aligned and connected with the card groove 42 on the shell 3, and then the card column 5 is passed through the two connected groups of card grooves 42 respectively, and the ends of the card column 5 are respectively located in the card grooves 42 on the shell 3, so that the card column 5 can be respectively engaged with the protrusion 41 and the shell 3. At this time, the end cover 4 is effectively fixed at the opening of the shell 3 under the limiting effect of the card column 5 and the sealing effect is achieved. While being convenient and fast, it also reduces the quality problems of the electronic tag caused by high-temperature sealing, and further improves the production quality and service life of the electronic tag.

[0030] As an embodiment of the present invention, a positioning groove 43 with a circular cross-section is provided in the middle of the inner end of the end cover 4, a positioning rod 6 is provided inside the end cover 4, and an elastic layer 61 is wrapped on the side wall of the positioning rod 6. The inner end of the positioning rod 6 is interference-fitted inside the positioning groove 43, and a slide groove 51 is provided on the top surface of the card column 5 corresponding to the outer end of the positioning rod 6. The outer end of the positioning rod 6 is located inside the slide groove 51, and when the outer end of the positioning rod 6 is in contact with the inner end side wall of the slide groove 51, the two ends of the card column 5 are respectively located in the card groove 42 on the housing 3; when working, by providing a positioning rod 6 on the end cover 4 to match the card column 5 When the card column 5 moves from one group of card slots 42 to another group of card slots 42, the slide groove 51 on the card column 5 can gradually cooperate with the positioning rod 6 fixed inside the end cover 4, so that the positioning rod 6 slides relative to the slide groove 51. When the outer end of the positioning rod 6 fits with the inner end side wall of the slide groove 51, the two ends of the card column 5 can be effectively located inside the two card slots 42 on the shell 3 and play a certain positioning effect, preventing the card column 5 from being insufficiently or excessively inserted into the card slot 42, resulting in the fixing failure of the shell 3 and the end cover 4, thereby further improving the stability and effectiveness of the electronic tag during production.

[0031] As an embodiment of the present invention, the cross-sectional shapes of the two ends of the card column 5 are respectively set to a trapezoidal shape, and the ends of the card column 5 gradually shrink from the inside to the outside; when working, by setting the shapes of the two ends of the card column 5, the ends of the card column 5 gradually shrink from the inside to the outside, thereby facilitating the end of the card column 5 to easily and stably penetrate into the notch of the card slot 42, reducing the situation where the card column 5 and the card slot 42 are difficult to insert due to insufficient alignment during cooperation, and further improving the convenience of the electronic tag during production.

[0032] As an embodiment of the present invention, inclined guide surfaces 52 are respectively provided on both side walls of the outer end of the slide groove 51, and the guide surfaces 52 make the notch of the slide groove 51 gradually larger from the inside to the outside; during operation, in order to make the outer end of the slide groove 51 on the card column 5 more effectively and stably cooperate with the bottom end of the positioning rod 6, at this time, a guide surface 52 that can gradually increase the notch is provided at the outer end of the slide groove 51, so that the positioning rod 6 can rely on sliding on the inclined guide surface 52 to stably enter the interior of the slide groove 51, so that the positioning rod 6 can more stably and effectively cooperate with the slide groove 51, further improving the stability and effectiveness of the electronic tag during production.

[0033] As an embodiment of the present invention, one end of the positioning rod 6 close to the opening of the end cover 4 is slidably connected with a pressure plate 62, and a spring 63 is provided between the inner end of the pressure plate 62 and the inner end of the end cover 4; during operation, when the card column 5 moves from the card slot 42 on one side to the card slot 42 on the other side, the inclined surface at the end of the card column 5 can apply pressure to the pressure plate 62, so that the pressure plate 62 is forced to slide toward the top of the positioning rod 6 and apply pressure to the spring 63. After the card column 5 and the card slots 42 on both sides are matched, the pressure plate 62 applies reverse pressure to the card column 5 under the rebound force of the spring 63, so that the two ends of the card column 5 can be effectively pressed on the bottom surface of the card slot 42 and play a certain fixing effect, preventing the card column 5 from moving in the card slot 42 under the influence of the outside world, thereby causing the connection between the shell 3 and the end cover 4 to fail, further improving the stability of the electronic tag during production and use.

[0034] As an embodiment of the present invention, an inclined plate 64 is provided on one side of the pressure plate 62 away from the outer end of the slide groove 51, and the inclined plate 64 is parallel to the inclined surface of the end of the card column 5 and the inclined plate 64; during operation, in order to enable the card column 5 to more effectively drive the pressure plate 62 to move upward during movement, an inclined plate 64 is provided on one side of the pressure plate 62, so that the card column 5 can drive the pressure plate 62 to move through the full fit and extrusion of its own inclined surface and the inclined plate 64, thereby preventing the card column 5 from directly squeezing the pressure plate 62 and causing it to get stuck, thereby further improving the stability of the electronic tag during production.

[0035] As an embodiment of the present invention, a sealing layer 7 is respectively pasted on the outside of the card slot 42, and the outer surface of the sealing layer 7 is flush with the outer wall of the shell 3; during operation, in order to improve the sealing effect of the chamber composed of the shell 3 and the end cover 4, after the shell 3 and the end cover 4 are matched, the sealing layer 7 coated with glue is pasted on the outside of the card slot 42 to prevent external dust or moisture from entering the inside of the shell 3 from the card slot 42, thereby greatly improving the protective effect of the chamber composed of the shell 3 and the end cover 4 on its internal structure. At the same time, since the outer surface of the sealing layer 7 is flush with the outer wall of the shell 3, the sealing layer 7 is prevented from protruding outside the shell 3 and easily falling off under the interference of external force, thereby further improving the stability of the electronic tag in use.

[0036] As an embodiment of the present invention, the positioning groove 43 is arranged in the form of a through hole, and when the bottom end of the positioning rod 6 is in contact with the bottom surface of the slide groove 51, the top surface of the positioning rod 6 is flush with the top end of the end cover 4; during operation, by setting the positioning groove 43 in the form of a through hole, it is not only convenient for processing, but also convenient for the positioning rod 6 to be inserted from the notch of the positioning groove 43 outside the shell 3 and assembled with it. At the same time, when the bottom end of the positioning rod 6 is inserted to fit with the bottom surface of the slide groove 51, the top surface of the positioning rod 6 is just flush with the top end of the end cover 4, preventing the top end of the positioning rod 6 from protruding outside the end cover 4 and being easily affected by external interference, thereby further improving the stability of the electronic tag during use.

[0037] As an embodiment of the present invention, the length of the elastic layer 61 is the same as the depth of the positioning groove 43, and the top of the elastic layer 61 is flush with the top of the positioning rod 6; when working, by shortening the length of the elastic layer 61, not only the material is greatly saved, but also the bottom end of the positioning rod 6 not wrapped with the elastic layer 61 is easier to pass through the positioning groove 43. At the same time, when the bottom end of the positioning rod 6 is inserted to fit the bottom surface of the slide groove 51, the elastic layer 61 can be just interference installed inside the positioning groove 43 and play a limiting and fixing effect on the positioning rod 6, further improving the speed of electronic tags during production.

[0038] As an embodiment of the present invention, the bottom end of the elastic layer 61 is set to be funnel-shaped, and the outer diameter of the bottom end of the elastic layer 61 is the same as the diameter of the positioning rod 6; when working, by setting the bottom end of the elastic layer 61 to be funnel-shaped and making a smooth transition between the bottom end of the elastic layer 61 and the positioning rod 6, the bottom end of the elastic layer 61 at the positioning rod 6 can be more easily inserted into the positioning groove 43, thereby making the entire elastic layer 61 able to be more stably and conveniently installed in the positioning groove 43.

[0039] As an embodiment of the present invention, the protrusion 41 is arranged in a ring shape; when working, by setting the protrusion 41 in a ring shape, not only the overall strength of the protrusion 41 is enhanced, and the protrusion 41 that cooperates with the outer shell 3 is prevented from breaking under the influence of the outside world, but also the annular protrusion 41 can fit more fully with the inner wall of the outer shell 3, so that the protrusion 41 can more comprehensively seal the position where the outer shell 3 and the end cover 4 fit, further improving the protective effect of the chamber composed of the outer shell 3 and the end cover 4 on the internal structure.

[0040] During operation, first install the rod coil and the RFID chip 2 inside the shell 3, then insert the protruding portion 41 of the end cover 4 into the open end of the shell 3, and align and connect the protruding portion 41 with the card slot 42 on the shell 3, then pass the card column 5 through the two connected card slots 42 respectively, and make the ends of the card column 5 respectively located in the card slots 42 on the shell 3, so that the card column 5 can be respectively engaged with the protruding portion 41 and the shell 3. At this time, the end cover 4 is effectively fixed at the opening of the shell 3 under the limiting effect of the card column 5 and realizes the effect of sealing the head. While being convenient and fast, it also reduces the quality problems of the electronic tag caused by high-temperature sealing, and further improves the production quality of the electronic tag. The amount and service life of the card column 5 are improved, and a positioning column matched with the card column 5 is arranged on the end cover 4. When the card column 5 moves from one group of card slots 42 to another group of card slots 42, the slide groove 51 on the card column 5 can gradually cooperate with the positioning rod 6 fixed inside the end cover 4, so that the positioning rod 6 slides relative to the slide groove 51. When the outer end of the positioning rod 6 fits with the inner end side wall of the slide groove 51, the two ends of the card column 5 can be effectively located inside the two card slots 42 on the shell 3 and play a certain positioning effect, thereby preventing the card column 5 from being insufficiently or excessively inserted in the card slot 42, resulting in the fixing failure of the shell 3 and the end cover 4, thereby further improving the stability and effectiveness of the electronic tag during production.

[0041] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An electronic tag, comprising a magnetic bar coil (1) and an RFID chip (2); characterized in that: The magnetic bar coil (1) and the RFID chip (2) are provided with a tubular shell (3) outside, the open end of the shell (3) is provided with a tubular end cover (4) matched therewith, the outer diameter of the end cover (4) is the same as the outer diameter of the shell (3), and the thickness of the side wall of the end cover (4) is greater than the thickness of the side wall of the shell (3), a protrusion (41) is provided on the inner wall of the open end of the end cover (4), the outer diameter of the protrusion (41) is the same as the inner diameter of the shell (3), two groups of communicating card slots (42) are symmetrically provided on the protrusion (41) and the side wall of the open end of the shell (3), and a card column (5) matched therewith is inserted inside the card slot (42), and the length of the card column (5) is between the inner diameter length and the outer diameter length of the shell (3); A positioning groove (43) with a circular cross-section is provided at the middle of the inner end of the end cover (4), a positioning rod (6) is provided inside the end cover (4), the side wall of the positioning rod (6) is wrapped with an elastic layer (61), the inner end of the positioning rod (6) is interference-fitted inside the positioning groove (43), and a slide groove (51) matching with the outer end of the positioning rod (6) is provided on the top surface of the clamping column (5) corresponding to the outer end of the positioning rod (6), the outer end of the positioning rod (6) is located inside the slide groove (51), and when the outer end of the positioning rod (6) is in contact with the inner end side wall of the slide groove (51), the two ends of the clamping column (5) are respectively located in the clamping groove (42) on the housing (3); The cross-sectional shapes of the two ends of the clamping column (5) are respectively set to be trapezoidal, and the ends of the clamping column (5) gradually decrease from the inside to the outside; Inclined guide surfaces (52) are respectively provided at the two side walls of the outer end of the slide groove (51), and the guide surfaces (52) make the notch of the slide groove (51) gradually increase in size from the inside to the outside; One end of the positioning rod (6) close to the opening of the end cover (4) is slidably connected to a pressure plate (62), and a spring (63) is provided between the inner end of the pressure plate (62) and the inner end of the end cover (4); An inclined plate (64) is provided on one side of the pressure plate (62) away from the outer end of the slide groove (51), and the inclined plate (64) is parallel to the inclined surface of the end of the clamping column (5) and the inclined plate (64); A sealing layer (7) is pasted on the outside of the card slot (42), and the outer surface of the sealing layer (7) is flush with the outer wall of the housing (3); The positioning groove (43) is configured in the form of a through hole, and when the bottom end of the positioning rod (6) is in contact with the bottom surface of the slide groove (51), the top surface of the positioning rod (6) is flush with the top end of the end cover (4); The length of the elastic layer (61) is the same as the depth of the positioning groove (43), and the top end of the elastic layer (61) is flush with the top end of the positioning rod (6); The bottom end of the elastic layer (61) is configured to be funnel-shaped, and the outer diameter of the bottom end of the elastic layer (61) is the same as the diameter of the positioning rod (6); The protrusion (41) is arranged in a ring shape; At this time, by arranging a guide surface (52) at the outer end of the slide groove (51) so that the notch thereof can be gradually enlarged, the positioning rod (6) can stably enter the interior of the slide groove (51) by sliding on the inclined guide surface (52), so that the positioning rod (6) can cooperate with the slide groove (51) more stably and effectively; The pressure plate (62) applies reverse pressure to the clamping column (5) under the rebound force of the spring (63), so that the two ends of the clamping column (5) can be effectively pressed on the bottom surface of the clamping groove (42) and play a certain fixing effect, thereby preventing the clamping column (5) from moving in the clamping groove (42) under the influence of the outside world, thereby causing the connection between the housing (3) and the end cover (4) to fail; By arranging an inclined plate (64) on one side of the pressing plate (62), the clamping column (5) can drive the pressing plate (62) to move through the full fit and compression between its own inclined surface and the inclined plate (64), thereby preventing the clamping column (5) and the pressing plate (62) from being stuck due to direct compression; During operation, the rod coil and the RFID chip (2) are first installed inside the housing (3), and then the protruding portion (41) of the end cover (4) is inserted into the open end of the housing (3), and the protruding portion (41) is aligned and connected with the card slot (42) on the housing (3). Then, the card column (5) is passed through the two connected card slots (42) respectively, and the ends of the card column (5) are respectively located in the card slots (42) on the housing (3), so that the card column (5) can be respectively engaged with the protruding portion (41) and the housing (3). At this time, the end cover (4) is fixed at the opening of the housing (3) under the limit of the card column (5) to achieve the head sealing, and the card column (5) is inserted into the end cover. A positioning column (4) is provided on the housing (3) to cooperate with the card column (5). When the card column (5) moves from one group of card slots (42) to another group of card slots (42), the slide groove (51) on the card column (5) can gradually cooperate with the positioning rod (6) fixed inside the end cover (4), so that the positioning rod (6) slides relative to the slide groove (51). When the outer end of the positioning rod (6) fits with the inner end side wall of the slide groove (51), the two ends of the card column (5) can be located inside the two card slots (42) on the housing (3), preventing the card column (5) from being inserted insufficiently or excessively into the card slot (42), resulting in failure of fixing the housing (3) and the end cover (4).

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