A low voltage power rail system
The conductive strips wrapped in conductive rubber are used to form a conductive dielectric in the low-voltage power-taking track system, which solves the problem of short circuit in humid environments and the increase in impedance of conductive rubber, and achieves efficient and safe power transmission.
Patent Information
- Application Number
- CN201811618665.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-12-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2038-12-27
AI Technical Summary
In humid environments, low-voltage power-taking track systems are prone to short-circuits due to contact between copper strips and liquid, resulting in frequent failures, and the impedance of conductive rubber increases during long-distance power transmission, affecting efficiency.
The first and second conductive strips wrapped in conductive rubber are formed by extrusion contact to form a conductive dielectric to avoid direct contact between the copper strip and air, ensuring the isolation function of the conductive rubber in a humid environment, and reducing the resistance value when under pressure Improve conductive properties.
Effectively prevent short circuits, expand the scope of application to humid environments, and improve power transmission efficiency and safety performance.
Smart Images
Figure CN109921245B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of lighting, and in particular to a low-voltage power rail system. Background Art
[0002] Low-voltage power rail systems are widely used in commercial lighting fields such as supermarket shelves and freezer shelves. In order to ensure good electrical contact, low-voltage power rail systems generally use bare copper bars as positive and negative electrodes, and in order to improve the effective utilization of electricity, pure copper is often used.
[0003] However, copper strips exposed to air are prone to patina, which increases the contact impedance between the power plug and the electrode, affecting the power supply effect. In order to overcome the above problems, the surface of the copper strips is often electroplated, but this still cannot solve the problem that a humid environment will cause liquid to form on the surface of the track. The exposed positive and negative electrodes of the copper strips are easily short-circuited by the liquid, causing frequent failures of the low-voltage power supply track system, making the low-voltage power supply track system only suitable for dry environments.
[0004] Conductive rubber is rubber evenly doped with metal conductive particles. Currently, the industry mainly uses it for small current applications such as shielding, anti-interference, contact buttons, signal conduction, etc., that is, it is used in non-power devices, but not for power devices for power transmission. The main reason is that the impedance of pure wire rubber is relatively large. Although the impedance is very small after squeezing, when it is directly used as a conductive component for long-distance power transmission, its impedance will increase with the increase of distance, resulting in very large losses. The so-called long distance here is relatively close in the traditional sense, such as 10 centimeters. Summary of the invention
[0005] In view of the above problems, an object of the present invention is to provide a low-voltage power rail system with a wide range of applications, high power transmission efficiency and good safety performance.
[0006] In particular, a low-voltage power rail system of the present invention comprises a power rail and a power plug connected to the power rail, wherein a first conductive strip is provided on the surface of the power rail, and a second conductive strip that can contact the first conductive strip to draw power is provided in the power plug, and is characterized in that:
[0007] The surfaces of the first conductive strip and the second conductive strip are both wrapped with conductive rubber. When the power plug is connected to the transmission track, the conductive rubber on the second conductive strip squeezes and contacts the conductive rubber on the first conductive strip. The resistance of the part of the conductive rubber squeezed and contacted is reduced to form a conductive medium.
[0008] Preferably, the second conductive bar is bent toward the first conductive bar to form a bent portion parallel to the first conductive bar, and the bent portion squeezes and contacts the first conductive bar when the power plug is assembled with the transmission track; the shape of the conductive rubber on the surface of the second conductive bar is adapted to the deformation of the second conductive bar.
[0009] Preferably, the second conductive strip extends out of the power plug, and a common rubber layer surrounds the outer periphery of the extended portion.
[0010] Preferably, the second conductive bar extends out of the power taking plug, and a limiting portion extending toward the second conductive bar is provided in the power taking plug, and the lower end of the limiting portion contacts the second conductive bar and applies pressure thereto toward the transmission track.
[0011] Preferably, the power plug includes an upper end cover and a lower end cover fixedly assembled with the upper end cover;
[0012] The lower end cover is provided with an opening, and the bent portion is exposed outside the power plug through the opening.
[0013] Preferably, the power plug is connected to the power transmission track by means of a fixture fixedly mounted thereon;
[0014] The power transmission track is provided with a clamping portion, and the lower ends of the two clamping plates of the clamp pass through the power plug from top to bottom and are clamped on both sides of the clamping portion.
[0015] Compared with the prior art, the advantages of the present invention are: wrapping the copper bar with conductive rubber can enable the conductive rubber to play a protective and isolating role, avoid direct contact between the copper bar and the air to produce copper rust, and prevent the copper bar from causing short circuit problems due to liquid condensed on the guide rail in a humid environment. At the same time, it can fully utilize the characteristic of conductive rubber having good conductivity when under pressure. When the power plug contacts the track, it acts as a conductive medium to assist the copper bar in transmitting electricity. This enables the low-voltage power rail system to be safely used in a humid environment, expands the scope of application, and effectively ensures the power transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of the low-voltage power rail system for this application.
[0017] Figure 2 for Figure 1 Exploded diagram.
[0018] Figure 3 for Figure 2 A first angle schematic diagram of .
[0019] Figure 4 for Figure 2 A second angle schematic diagram of . DETAILED DESCRIPTION
[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0021] For introductory explanations, Figure 1-4 An embodiment of the low-voltage power rail system of the present application is shown. The low-voltage power rail system includes a transmission rail 1, a power plug 2 assembled and connected to the transmission rail 1, a first conductive strip 11 is provided on the surface of the transmission rail 1, and a second conductive strip 21 is provided in the power plug 2 that can contact the first conductive strip 11 to draw power. The low-voltage power rail system also includes a connection part 3 for an external low-voltage power supply, such as Figure 1 As shown, of course, the low-voltage power rail system also includes other components, such as corner connectors between transmission rails, etc., but since these are not the focus of this application, they will not be expanded in detail here. As for the connecting part 3, it will be briefly explained below.
[0022] like Figure 1 As shown, the connection part 3 is located at one end of the transmission track 1, and the connection part 3 is connected to a low-voltage power supply through a copper bar 5. The low-voltage power supply is generally 24V or 48V. The copper bar 5 is electrically connected to the transmission track 3 by welding. The copper bar 5 transmits the power from the power supply end to the transmission track 3, and the power plug 2 takes power from the transmission track 3 to supply power to the lighting end. Of course, the copper bar 5 can also be electrically connected to the transmission track 3 in other ways. This technology is well known to those skilled in the art, so it is not described in detail here.
[0023] In the present application, the surfaces of the first conductive strip 11 and the second conductive strip 21 are both wrapped with conductive rubber 4. When the power plug 2 is connected to the transmission track 1, the conductive rubber 4 on the second conductive strip 21 squeezes and contacts the conductive rubber 4 on the first conductive strip 11. The resistance of the part of the conductive rubber 4 that is squeezed and contacted is reduced to form a conductive medium. For details, please refer to Figure 3-4 .
[0024] The conductive rubber has a large resistance when it is not under pressure. When it is wrapped on the surface of the conductive strip, the conductive rubber can play the insulating function of rubber and good sealing performance to isolate the conductive strip from the air. Even if the low-voltage power rail system is used in a humid environment, the conductive rubber can effectively prevent the conductive strip from contacting the liquid condensed on the track to form a short circuit due to the isolation and insulation effect of the conductive rubber, avoid causing failures, improve safety, overcome the problem that the low-voltage power rail system can only be applied to dry environments in the past, and expand the scope of application of the low-voltage power rail system. At the same time, when the conductive rubber is subjected to a certain pressure, the resistance of the squeezed part will decrease, and it has good conductivity. In this way, when the second conductive strip is squeezed and contacted with the first conductive strip, the resistance of the squeezed part of the conductive rubber is reduced to form a conductive medium, thereby serving as a bridge for power transmission between the first conductive strip and the second conductive strip, while the resistance of other parts that are not directly contacted and squeezed remains basically unchanged, and continues to play the insulation isolation function. In this way, the conductive strip can complement the conductive rubber and have good power transmission performance while being applicable to humid environments.
[0025] In order to enable the conductive rubber on the second conductive bar to be effectively squeezed and contacted with the conductive rubber on the first conductive bar, the second conductive bar 21 is bent toward the first conductive bar 11 to form a bent portion 211 parallel to the first conductive bar 11. When the power plug 2 is assembled with the transmission track 1, the bent portion 211 squeezes and contacts the first conductive bar 11. The shape of the conductive rubber 4 on the surface of the second conductive bar 21 is adapted to the deformation of the second conductive bar 21, that is, the conductive rubber 4 on the second conductive bar 21 is bent following the deformation of the second conductive bar 21, and the formed bent portion squeezes and contacts the conductive rubber 4 on the first conductive bar 11 to form a conductive medium.
[0026] The second conductive strip 21 extends out of the power plug 2. Figure 1 As shown, in order to facilitate long-term use in a humid environment, the outer periphery of the extended portion of the second conductive strip 2 is surrounded by a common rubber layer. Figure 2-4 The power plug 2 includes an upper end cover 22 and a lower end cover 23 fixedly assembled with the upper end cover 22. A limiting portion 24 extending toward the second conductive bar 11 is provided in the power plug 1. The lower end of the limiting portion 24 contacts the second conductive bar 11 and applies pressure toward the transmission track 1. Since the limiting portion can apply a force toward the track to the conductive bar, it can effectively prevent the conductive bar from being pulled out due to excessive external force, and has a good anti-pull-off effect. The limiting portion 24 can be arranged perpendicular to the second conductive bar 11, that is, the limiting portion 24 is perpendicular to the inner wall of the upper end cover 22. At the same time, the limiting portion 24 is a limiting bar, such as Figure 3 As shown, it may also be other structures that can achieve the anti-pull-off effect.
[0027] At the same time, it should be mentioned that in order to achieve the squeeze contact between the second conductive strip 21 and the first conductive strip 11, it is obvious that an opening 231 needs to be provided on the lower end cover 23 of the power plug 2, and the bent portion 211 of the second conductive strip 21 wrapped with the conductive rubber 4 is exposed outside the power plug 1 through the opening 231. Figure 3 That is, it shows a schematic diagram of the structure between the lower end cover 23 and the opening 231 .
[0028] In order to facilitate maintenance, in this embodiment, the power plug 2 is detachably connected to the transmission track 1, so that only the faulty part can be removed without overhauling the entire system, saving costs. Specifically in this embodiment, the power plug 2 is assembled and connected to the transmission track 1 through a clamp 6 fixedly installed thereon, and a clamping portion 12 is provided on the transmission track 1. The lower ends of the two clamps 61 of the clamp 6 pass through the power plug 2 from top to bottom and are clamped on both sides of the clamping portion 12. Of course, other connection methods can also be used to make the power plug detachably connected to the transmission track. There are many specific methods, which can be designed according to the actual situation, but this is not the focus of protection of this application, so it is not listed here one by one.
[0029] In addition to the above improvements, other similar improvements are also included in the scope of improvement of the present invention, which will not be described in detail here. Although the embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principles and purpose of the present invention.
Claims
1. A low-voltage power rail system, comprising a power rail (1) and a power plug (2) assembled and connected to the power rail (1), wherein a first conductive strip (11) is provided on the surface of the power rail (1), and a second conductive strip (21) is provided in the power plug (2) that can contact the first conductive strip (11) to draw power, characterized in that: The surfaces of the first conductive strip (11) and the second conductive strip (21) are both wrapped with conductive rubber (4); when the power plug (2) is connected to the power transmission track (1), the conductive rubber (4) on the second conductive strip (21) squeezes and contacts the conductive rubber (4) on the first conductive strip (11); the resistance of the portion of the conductive rubber (4) that is squeezed and contacted is reduced to form a conductive medium; wherein: The second conductive strip (21) is bent toward the first conductive strip (11) to form a bent portion (211) parallel to the first conductive strip (11); when the power plug (2) is assembled with the power transmission track (1), the bent portion (211) presses and contacts the first conductive strip (11); the shape of the conductive rubber (4) on the surface of the second conductive strip (21) is adapted to the deformation of the second conductive strip (21); The second conductive bar (21) extends out of the power plug (2), and a limiting portion (24) extending in the direction of the second conductive bar (21) is provided in the power plug (2), wherein the lower end of the limiting portion (24) contacts the second conductive bar (21) and applies pressure thereto in the direction of the power transmission track (1).
2. The low-voltage power rail system according to claim 1, characterized in that: The second conductive strip (21) extends out of the power plug (2), and a common rubber layer surrounds the outer periphery of the extended portion.
3. The low-voltage power rail system according to claim 1, characterized in that: The power plug (2) comprises an upper end cover (22) and a lower end cover (23) fixedly assembled with the upper end cover (22); The lower end cover (23) is provided with an opening (231), and the bent portion (211) is exposed outside the power plug (2) through the opening (231).
4. The low-voltage power rail system according to claim 1, characterized in that: The power plug (2) is assembled and connected to the power transmission track (1) via a fixture (6) fixedly mounted thereon; The power transmission track (1) is provided with a clamping portion (12), and the lower ends of the two clamping plates (61) of the clamp (6) pass through the power plug (2) from top to bottom and are clamped on both sides of the clamping portion (12).