A power supply rail system for active electronic tags

Abstract

The application relates to the field of electronic tags, in particular to a power supply rail system of an active electronic tag. The power supply rail system comprises a power supply rail and an electronic tag body, and the two are connected through a detachable plug-in structure, can be quickly disassembled and maintained, the inner side of the power supply rail is provided with independent double-layer air slots, and the positive and negative conductive strips are embedded and isolated, so that short circuit is effectively reduced; the power supply cover plate is provided with positive and negative metal conductive springs, the two respectively extend into the first air slot and the second air slot and elastically abut against the corresponding conductive strips, the electronic tag is installed in contact with the conductive strips and is powered on at any position of the power supply rail, the power supply cover plate is provided with an elastic clamp and a protrusion, and the protrusion and the fixed clamping groove arranged on the inner side of the power supply rail form a releasable buckling locking connection. Therefore, the integrated coupling design of quick disassembly, reliable locking, transverse position adjustment and continuous power supply of the electronic tag at any position of the rail guarantees the continuous display and stable power supply of the electronic tag, and is suitable for high-frequency change scenes such as retail and storage.

Description

Technical Field

[0001] This application relates to the field of electronic tags, and more specifically, to a power supply rail system for active electronic tags. Background Technology

[0002] With the development of the Internet of Things (IoT), electronic tags are widely used in retail, warehousing, and terminal management scenarios to display prices, inventory, identification information, or equipment status. Passive tags are battery-powered, which results in frequent battery replacements and high maintenance costs. Actively powered electronic tags use external rail power supply, which reduces the burden of battery maintenance, but the rail power supply structure places higher demands on installation convenience, contact reliability, and safety isolation.

[0003] Clip-on rail-powered electronic tags, exemplified by US12118904B2, typically require precise alignment of the tag's contacts with pre-set power contacts or conductive parts on the rail. This necessitates repeated adjustments during installation or replacement, resulting in low efficiency. When the tag needs to be moved laterally along the rail, the local contact power supply structure is prone to power outages or poor contact. Furthermore, if the positive and negative conductive parts are too close together or excessively exposed, it can increase the risk of accidental contact, dust accumulation leading to short circuits, and assembly short circuits. Over time, wear, vibration, or human error can cause loosening, unstable contact, and decreased maintenance efficiency.

[0004] A Chinese invention with publication number CN109784460A proposes a rail-type electronic tag that relies on the elastic box of the cantilever housing and the rib slot for positioning. This solution makes the electronic tag prone to slippage and displacement when subjected to shelf vibration or collisions with foreign objects. Furthermore, frequent tag removal and installation in supermarket settings can cause repeated deformation, fatigue, and loss of elasticity of the plastic cantilever, leading to the failure of the locking mechanism and causing the conductive spring to detach from the PCB copper foil, resulting in power outages. In addition, the rail is rigidly connected to the shelf by hard clips or screws without a buffer and shock absorption structure. Vibrations from forklifts and trolleys are directly transmitted to the PCB and conductive spring inside the rail, causing the spring to detach from the copper foil momentarily and frequently resulting in power outages. In addition, when the label is laterally adjusted on the guide rail, the conductive spring continuously slides on the PCB copper foil surface. Affected by bumps or slight deviations, it is very easy to cause a loose connection and power failure. The arc-shaped conductive spring is also prone to jumping out of the bus line during the sliding process, causing power interruption. At the same time, the long-term friction of the spring will wear down the copper foil on the PCB surface. In addition, all power and communication lines are located in a single cavity without the isolation of separate slots. Dust condensation can easily cause copper foil oxidation and corrosion and short circuits. Furthermore, long guide rails require multiple PCB sections to be spliced ​​and assembled. After the splicing points are vibrated, aged and loosened, segmented power failure problems will occur.

[0005] While some existing guide rail fasteners incorporate buffer and shock-absorbing structures to enhance connection stability, these fasteners and shock-absorbing components are separate from the conductive structure. The mechanical locking and the conductive layout of the guide rail are disconnected, allowing only for simple mechanical engagement and limiting, and cannot be integrated with conductive power supply and position sliding functions. In retail and warehousing scenarios, electronic tags require frequent adjustments to their installation position based on product placement, and their screens must remain continuously lit to display prices and inventory data. However, the electronic tag display requires continuous power to stably display price tag information; any momentary power outage will cause screen flickering, blackouts, and information loss. In addition, from the perspective of safety and display stability, the disassembly and assembly of electronic tags requires strict control of electrical continuity to prevent accidental contact of metal contacts during disassembly and assembly, which could lead to arcing or leakage. At the same time, it is necessary to avoid repeated switching on and off during disassembly and assembly, which could damage the LCD screen. Therefore, the clip structure used on electronic tags not only requires high efficiency in disassembly and assembly, but also has stringent requirements for the continuity and stability of power supply during movement, as well as the coordinated control of disassembly and assembly actions and electrical continuity and off. Existing split clips are obviously not suitable for the above-mentioned usage conditions. If this type of clip is applied to a guide rail structure similar to CN109784460A, on the one hand, it cannot change the inherent structural defects of the PCB copper foil. Even with the addition of shock-absorbing components, the spring and copper foil will still separate momentarily after the shelf is hit by a trolley or vibrated by a forklift, causing intermittent power supply and resulting in frequent screen flickering and blackouts. On the other hand, because the clip locking action cannot constrain the contact state of the conductive spring, it is impossible to achieve synchronous control of disassembly and circuit switching. During disassembly and assembly, the contacts can open and close arbitrarily, which can easily lead to arcing and leakage. In particular, during disassembly and assembly, the spring misalignment can easily cause intermittent and repeated power supply, accelerating the aging and damage of the LCD screen. In addition, the original guide rail uses a single cavity shared cavity wiring, which cannot achieve positive and negative polarity isolation. The shelf environment is dusty and prone to condensation due to day and night temperature differences, resulting in a high rate of short circuit failures and significantly increasing the cost of later inspection and maintenance.

[0006] In summary, existing fixed-position snap-on and conventional rail-type powered electronic tags generally suffer from problems such as cumbersome disassembly and repositioning, inconvenient alignment and installation, unreliable snap-on fixation, easy power outages caused by vibration, easy wear and oxidation of conductive contact surfaces, high risk of short circuits due to lack of isolation protection for the circuit, and easy contact failure at the splicing points of long rails. They are difficult to meet the comprehensive requirements of electronic tags in retail and warehousing scenarios for rapid disassembly and assembly, stable display, safe power supply, and uninterrupted power supply during relocation.

[0007] Therefore, the electronic tag industry urgently needs an active electronic tag power supply rail system that can be quickly installed at any position on the rail, has reliable locking, continuous power supply during lateral adjustment, and can effectively reduce the risk of short circuits and poor contact. Summary of the Invention

[0008] To address the problems of cumbersome installation and alignment, inconvenient disassembly and replacement, easy power outage during adjustment, poor display stability, and insufficient safety protection of existing electronic tags, this invention provides a power supply rail system for active electronic tags. It integrates mechanical locking, conductive power supply, and sliding adjustment functions into a single design, enabling tags to be quickly inserted, reliably locked, easily disassembled, and continuously powered at any position on the rail. At the same time, structural isolation and action linkage ensure the display stability and power safety of the electronic tags, making it suitable for high-frequency changing scenarios such as retail and warehousing.

[0009] To achieve the above objectives, this application provides a power supply rail system for an active electronic tag, comprising: a power supply rail, the power supply rail having an inverted U-shaped cross-section, a conductive mechanism on one side of the U-shaped inner cavity of the power supply rail, and a locking mechanism on the opposite side; the conductive mechanism includes a first slot and a second slot, the first slot and the second slot being located on the inner cavity sidewall of the power supply rail and horizontally arranged along the length of the inner cavity sidewall of the power supply rail, the first slot and the second slot respectively partially enclosing or enclosing a positive conductive strip and a negative conductive strip; the locking mechanism includes a fixing slot, the fixing slot being located at the opening end of the U-shaped inner cavity of the power supply rail; The electronic tag includes a body that is detachably mounted to the power supply rail; a power supply cover plate located on the body, the cover plate having an L-shaped cross-section, which is inserted into the power supply rail and electrically connected to the conductive mechanism, and also has a snap-fit ​​mechanism that cooperates with the locking mechanism for locking; a metal conductive spring located on the power supply cover plate, comprising a positive and a negative metal conductive spring, the ends of which are respectively positioned towards the first and second slots, and elastically abutting against the positive and negative conductive strips; and a snap-fit ​​mechanism including a spring clip connected to the top of the power supply cover plate, the spring clip surrounding the power supply cover plate, and a protrusion located on the side of the spring clip away from the body, which snaps and locks with the fixing slot.

[0010] Furthermore, the elastic clip can undergo elastic deformation under external force to drive the protrusion to move out of place. After the external force is removed, the elastic clip returns to its original position by its own elasticity, driving the protrusion to engage with the fixed slot and lock itself. The power supply cover plate and the locking panel where the fixed slot of the power supply guide rail is located fit together and limit each other.

[0011] Furthermore, the elastic clip undergoes elastic deformation under external force, causing the protrusion to move out of the fixed slot, thereby unlocking and separating the electronic tag body from the power supply rail.

[0012] Furthermore, the interval between the positive electrode conductive strip and the negative electrode conductive strip is 1–10 mm.

[0013] Furthermore, a fixing plate is provided on the outer side of the power supply rail away from the conductive mechanism, and a connector is provided on the fixing plate. One end of the connector is connected to the power supply rail, and the other end is connected to the fixing plate.

[0014] Furthermore, the connector is made of a soft material.

[0015] Furthermore, the positive and negative conductive strips are made of stainless steel.

[0016] Furthermore, the power supply rail is made of flame-retardant material.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: First, the power supply rail system for the active electronic tag of this invention integrates mechanical locking, conductive conduction, disassembly / unlocking, and sliding adjustment into a single, coupled design. Through structural design, the conductive spring is simultaneously pressed and connected when the latch is locked, and expands outward from the conductive surface when the latch is pressed to unlock, achieving a natural linkage between mechanical action and conductive state. This method avoids safety hazards such as partial contact, loose connection, and arcing during disassembly / unlocking, while ensuring a continuous and stable power supply to the electronic tag in the locked state. It fundamentally reduces problems such as screen flickering, black screen, and display abnormalities caused by poor contact or momentary power outages, ensuring that displayed information remains consistently stable and reliable.

[0018] Secondly, the power supply rail system for the active electronic tag of the present invention allows the electronic tag to be directly inserted at any position on the rail without aligning it with a preset contact point, truly achieving tool-free, quick disassembly and replacement by hand, greatly simplifying the operation process when goods are frequently adjusted in retail and warehousing scenarios, and significantly improving the efficiency of on-site setup and subsequent maintenance.

[0019] Third, the power supply rail system of the active electronic tag of the present invention adopts a structural layout with independent cavity isolation for positive and negative poles, which effectively isolates the conductive components from external dust, water vapor and condensation, significantly reducing the risk of short circuit; at the same time, the integrated locking structure can firmly constrain the contact state of the conductive spring, making it more resistant to shelf vibration and trolley impact, and less prone to problems such as poor contact, wear and oxidation of conductive surfaces during long-term use, thus significantly improving the system stability and service life.

[0020] Fourth, the power supply rail system for the active electronic tag of the present invention supports the electronic tag to slide arbitrarily on the entire rail and be continuously powered throughout the process. It can flexibly adapt to the actual use needs of dynamic adjustment of the storage location and frequent product change. There is no need to re-plug and reposition, which reduces the impact on the internal circuit of the electronic tag and significantly reduces the cost of later inspection, maintenance and replacement. It is more suitable for long-term use in high-density and high-turnover commercial scenarios. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a power supply rail system for an active electronic tag according to an embodiment of this application; Figure 2 This is a schematic diagram of the power supply rail system for an active electronic tag according to an embodiment of this application; Figure 3 This is a cross-sectional schematic diagram of a power supply rail system for an active electronic tag according to an embodiment of this application; Figure 4 This is a left view of the power supply rail provided according to an embodiment of this application; Figure 5 This is a left view of the body of the electronic tag provided according to an embodiment of this application; Figure 6 This is a rear view of the body of the electronic tag provided according to an embodiment of this application.

[0022] Reference numerals: 1. Power supply rail; 11. Locking mechanism; 111. Fixing slot; 12. Positive conductive strip; 13. Negative conductive strip; 2. Conductive mechanism; 21. First slot; 22. Second slot; 23. Fixing plate; 24. Connector; 3. Body; 31. Power supply cover plate; 32. Buckling mechanism; 33. Metal conductive spring; 34. Positive metal conductive spring; 35. Negative metal conductive spring; 36. Elastic clip; 37. Protrusion. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] In addition, the term "multiple" should mean two or more.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] A power supply rail system for active electronic tags, such as Figure 1 and Figure 2 As shown, the device includes a power supply rail 1 and an electronic tag body 3. The body 3 and the power supply rail 1 are connected by a detachable plug-in connection, which enables quick installation, fixing, disassembly and maintenance, and provides a continuous and stable external power supply for the active electronic tag.

[0030] like Figure 3 , Figure 4 and Figure 5As shown, the power supply rail 1 has an inverted U-shaped cross section. The body 3 of the electronic tag is provided with a power supply cover plate 31 with an L-shaped cross section. The L-shaped power supply cover plate 31 is inserted into the opening groove of the U-shaped power supply rail 1. It is positioned by relying on the two U-shaped wing plates. The L-shaped right angle surface is attached and fixed to the two side walls inside the U-shaped cavity. The two constrain each other, and the overall structure is evenly stressed and has excellent anti-loosening ability. A conductive mechanism 2 is provided on one side of the U-shaped inner cavity of the power supply rail 1, and a locking mechanism 11 is provided at the opening end of the U-shaped inner cavity on the other side. A metal conductive spring 33 is provided on one side of the power supply cover plate 31, and a buckling mechanism 32 is provided at the other end. During installation, the metal conductive spring 33 is electrically connected to the conductive mechanism 2 to provide power support for the electronic tag. The buckling mechanism 32 and the locking mechanism 11 work together to lock, realizing the mechanical locking and conductive conduction of the power supply rail 1 and the body 3 simultaneously. This ensures that the electronic tag is continuously and stably powered in the locked state, reducing problems such as screen flickering, black screen, and display abnormalities caused by poor contact and instantaneous power failure, and ensuring that the displayed information such as price and inventory is always clear and reliable.

[0031] Specifically, such as Figure 2 and Figure 4 As shown, the conductive mechanism 2 includes a first slot 21 and a second slot 22. The first slot 21 and the second slot 22 are horizontally distributed and extend along the length of the power supply rail 1. By setting the two layers of slots in a layered manner without crossing or overlapping, the positive and negative conductive strips are physically isolated, effectively avoiding the risk of short circuit. The first slot 21 and the second slot 22 respectively enclose the positive conductive strip 12 and the negative conductive strip 13. Subsequently, the positive conductive strip 12 and the negative conductive strip 13 also extend along the length of the power supply rail 1. The insulating slots physically enclose the conductive strips to prevent the conductive strips from being exposed and causing electric shock, and also to ensure that the rail has continuous power supply capability throughout the entire length. The metal conductive spring 33 includes a positive metal conductive spring 34 and a negative metal conductive spring 35. The ends of the electronic tag face the first slot 21 and the second slot 22 respectively. The positive metal conductive spring 34 and the negative metal conductive spring 35 are in contact with the positive conductive strip 12 and the negative conductive strip 13 to conduct electricity. In order to meet the needs of different retail warehousing scenarios, the body 3 of the electronic tag can be installed at any position of the power supply rail 1. Alternatively, after the body 3 is installed, the electronic tag is normally powered on and working. Without power interruption, the position of the electronic tag on the power supply rail 1 can be slid to install the electronic tag in the designated position without re-insertion and repositioning. It can flexibly adapt to the actual use needs of dynamic adjustment of the storage location and frequent product change. It reduces the impact on the internal circuit of the electronic tag and greatly reduces the cost of later inspection, maintenance and replacement. It is more suitable for long-term use in high-density and high-turnover commercial scenarios.

[0032] Specifically, such as Figure 3 and Figure 4As shown, the locking mechanism 11 includes a fixing slot 111, which is located at the end of the U-shaped inner cavity opening of the power supply rail 1. The latching mechanism includes a spring clip 36, as shown. Figure 2 and Figure 6 As shown, the elastic clip 36 is integrally connected to the top of the power supply cover plate 31. The elastic clip 36 is made of highly elastic plastic material and has good elastic deformation and rebound performance. The elastic clip 36 has an integrally formed protrusion 37 on its outer side. When the main body 3 is inserted into the power supply rail 1, the protrusion 37 contacts and presses against the inner wall of the power supply rail 1, causing the elastic clip 36 to deform inward to avoid contact. Alternatively, the elastic clip 36 can be pressed to deform and avoid contact. When inserted into place, the protrusion 37 faces the fixed slot 111, and the elastic clip 36 springs back, causing the protrusion 37 to lock into the fixed slot 111. This effectively prevents the main body 3 from loosening, shifting, or falling off during operation, resulting in extremely strong assembly stability and forming a high-strength mechanical lock that is vibration-resistant, tensile-resistant, and ensures a secure and non-loosening condition for long-term use. At the same time, the elastic clip 36 can be pressed to unlock it, facilitating disassembly, maintenance, and replacement later. During disassembly, simply press the elastic clip 36, and the protrusion 37 will disengage from the fixed slot, allowing the electronic tag to be pulled out directly, achieving elastic unlocking and quick disassembly of the electronic tag. The design integrates the mechanical locking, conductive power supply, and sliding adjustment functions of the power supply rail and electronic tag, enabling the electronic tag to be quickly inserted, reliably locked, easily disassembled, and continuously powered at any position on the rail. At the same time, structural isolation and action linkage ensure the display stability and power safety of the electronic tag.

[0033] like Figure 2 As shown, both the positive conductive strip 12 and the negative conductive strip 13 are integrally molded from stainless steel, preferably 304 stainless steel, which possesses excellent conductivity, corrosion resistance, oxidation resistance, and fatigue resistance. It can adapt to complex working conditions such as humidity, dust, and large temperature variations, and is not prone to rust or wear even after long-term use, maintaining stable conductivity and significantly extending the equipment's service life. Simultaneously, the spacing between the positive conductive strip 12 and the negative conductive strip 13 is strictly controlled within the range of 1–10 mm. This spacing is within the safe conductivity range, avoiding electrical short circuits caused by excessively small spacing while ensuring sufficient conductive contact area to guarantee continuous power supply. In this embodiment, a 5 mm spacing is preferred as the optimal adaptation parameter.

[0034] like Figure 1 As shown, in this embodiment, the power supply rail 1 is injection molded from flame-retardant material, preferably UL94-V0 grade flame-retardant ABS material, which has excellent insulation, flame retardant and anti-aging properties, can effectively prevent fire accidents caused by circuit overload and short circuit, improve the safety of equipment use, and is suitable for various complex indoor and outdoor working environments.

[0035] In addition, such as Figure 2 and Figure 4As shown, a fixing plate 23 is provided on the outer wall of the power supply rail 1 away from the conductive mechanism 2. The fixing plate 23 is a flat mounting base plate, which can be attached to various mounting carriers such as walls, shelves, and equipment racks to achieve the overall fixed installation of the power supply rail 1. A connector 24 is provided between the fixing plate 23 and the power supply rail 1. One end of the connector 24 is fixedly connected to the outer wall of the power supply rail 1, and the other end is fixedly connected to the inner side surface of the fixing plate 23. In this embodiment, as... Figure 3 As shown, connector 24 is made of soft insulating materials such as silicone and rubber, which has good elastic buffering and deformation adaptability. It can effectively absorb the vibration force generated by equipment operation and environmental vibration, and avoid vibration causing the conductive contacts to loosen or have poor contact. At the same time, the soft material has good insulation properties and will not interfere with the power supply circuit, further improving the stability and safety of equipment operation.

[0036] Working principle: First, the power supply rail 1 is installed in the designated position through the flexible connector 24 and the fixing plate 23. Then, the active electronic tag body 3 is aligned with the port of the inverted U-shaped power supply rail 1 and inserted.

[0037] During insertion, the protrusion 37 on the top elastic clip 36 of the power supply cover 31 is squeezed by the inner wall of the fixing slot 111 of the guide rail or by pressing the elastic clip 36, causing the elastic clip 36 to deform and avoid until the main body 3 is inserted into place. At this time, the protrusion 37 aligns with the fixing slot 111, the elastic clip 36 springs back to its original position, and the protrusion 37 and the fixing slot 111 form a snap lock, completing the quick fixation of the main body 3.

[0038] After assembly, the positive metal conductive spring 34 and the negative metal conductive spring 35 on the inner side of the power supply cover 31 are in elastic and tight contact with the positive conductive strip 12 and the negative conductive strip 13 in the first slot 21 and the second slot 22, respectively. The external power supply forms a complete power supply circuit through the positive conductive strip 12, the positive metal conductive spring 34, the negative metal conductive spring 35, and the negative conductive strip 13, and continuously provides stable power to the active electronic tag.

[0039] During equipment operation, the stainless steel conductive strip is wear-resistant and oxidation-resistant, the flame-retardant guide rail eliminates electrical safety hazards, and the snap-locking structure ensures that the main body does not loosen or fall off, comprehensively guaranteeing the long-term, stable, and safe operation of the equipment. When disassembly and maintenance are required, simply press the spring clip 36 to disengage the protrusion 37 from the fixing slot 111. The electronic tag body is instantly de-energized at the moment of pressing, and the main body 3 can be directly pulled out. The operation is simple and efficient. At the same time, the power supply rail opening faces downwards, making disassembly even more time-saving and labor-saving.

[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power supply rail system for an active electronic tag, characterized in that, include: The power supply guide rail (1) has an inverted U-shaped cross section. One side of the U-shaped inner cavity of the power supply guide rail (1) is provided with a conductive mechanism (2), and the other side is provided with a locking mechanism (11). The conductive mechanism (2) includes a first slot (21) and a second slot (22). The first slot (21) and the second slot (22) are located on the inner wall of the power supply rail (1) and are horizontally arranged along the length of the inner wall of the power supply rail (1). The first slot (21) and the second slot (22) respectively partially or completely enclose the positive electrode conductive strip (12) and the negative electrode conductive strip (13). The locking mechanism (11) includes a fixing slot (111), which is located at the end of the U-shaped inner cavity opening of the power supply guide rail (1); The electronic tag body (3) is detachably installed with the power supply rail (1); Power supply cover plate (31), the power supply cover plate (31) is located on the body (3), the power supply cover plate (31) has an L-shaped cross section, the power supply cover plate (31) is inserted into the power supply guide rail (1) and electrically connected to the conductive mechanism (2), and the power supply cover plate (31) is provided with a buckle mechanism (32) to cooperate with the locking mechanism (11) for locking; Metal conductive spring (33) is located on the power supply cover plate (31). The metal conductive spring (33) includes a positive metal conductive spring (34) and a negative metal conductive spring (35). The ends of the positive metal conductive spring (34) and the negative metal conductive spring (35) are respectively arranged facing the first slot (21) and the second slot (22). The positive metal conductive spring (34) and the negative metal conductive spring (35) are elastically abutted against the positive conductive strip (12) and the negative conductive strip (13). The latching mechanism (32) includes an elastic clip (36), which is connected to the top of the power supply cover plate (31). The elastic clip (36) surrounds the power supply cover plate (31). The elastic clip (36) has a protrusion (37) on it. The protrusion (37) is located on the side of the elastic clip (36) away from the body (3). The protrusion (37) is latched and locked with the fixing slot (111).

2. The power supply rail system for an active electronic tag as described in claim 1, characterized in that, The elastic clip (36) can undergo elastic deformation under external force to drive the protrusion (37) to move out of place. After the external force is removed, the elastic clip (36) returns to its original position by its own elasticity, causing the protrusion (37) to be snapped into the fixed slot (111) for self-locking. The power supply cover plate (31) and the locking panel where the fixed slot (111) of the power supply guide rail (1) is located fit together and limit each other.

3. The power supply rail system for an active electronic tag as described in claim 2, characterized in that, The elastic clip (36) undergoes elastic deformation under external force, causing the protrusion (37) to give way and disengage from the fixed slot (111), thereby unlocking and separating the electronic tag body (3) from the power supply rail (1).

4. The power supply rail system for an active electronic tag as described in claim 1, characterized in that, The interval between the positive electrode conductive strip (12) and the negative electrode conductive strip (13) is 1–10 mm.

5. The power supply rail system for an active electronic tag as described in claim 1, characterized in that, A fixing plate (23) is provided on the outside of the power supply rail (1) away from the conductive mechanism (2). A connector (24) is provided on the fixing plate (23). One end of the connector (24) is connected to the power supply rail (1), and the other end is connected to the fixing plate (23).

6. The power supply rail system for an active electronic tag as described in claim 5, characterized in that, The connector (24) is made of a soft material.

7. The power supply rail system for an active electronic tag as described in claim 1, characterized in that, The positive electrode conductive strip (12) and the negative electrode conductive strip (13) are made of stainless steel.

8. The power supply rail system for an active electronic tag as described in claim 1, characterized in that, The power supply rail (1) is made of flame-retardant material.

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