An LED lamp tube

Abstract

The utility model discloses a kind of LED lamp tubes, including lighting lamp, electric connector and two lamp cap assemblies, two lamp cap assemblies are respectively fixed in the two ends of lighting lamp;Lamp cap assembly includes lamp cap main body and lamp cap, one end of lamp cap main body is fixedly connected with lighting lamp, lamp cap is set to the other end of lamp cap main body, and lamp cap can rotate relative to lamp cap main body, electric connector is set on lamp cap, for realizing the electric connection of LED lamp tube and external device;The LED lamp tube disclosed in the present application, compared with the existing fixed type lamp cap, the simple design of the present application through the rotation of lamp cap relative to lamp cap main body, the relative angle adjustment of electric connector and external lamp holder can be realized, so as to change the light emitting direction of lighting lamp;Compared with complex rotary type lamp cap, the present application can realize direction adjustment due to only need lamp cap and lamp cap main body direct rotation cooperation, reduce the complexity of structure, reduce manufacturing cost, and there is no fragile part, no need for regular maintenance, significantly reduce use cost.

Description

Technical Field

[0001] This utility model relates to the field of lighting device technology, and in particular to an LED lamp tube. Background Technology

[0002] T8 LED tubes are a common type of LED fluorescent tube. The lamp holder designs of existing T8 LED tubes are mainly divided into two categories: fixed type and complex rotating type.

[0003] Among them, the fixed lamp head adopts an integrated injection molding or snap-on connection structure, and the lamp head and the lamp tube body remain relatively fixed, making it impossible to actively adjust the light direction. While it reduces assembly complexity and failure risk by simplifying mechanical parts, it is difficult to adapt to scenarios that require precise directional lighting, such as industrial workbenches, medical diagnostic equipment, and commercial display cabinets, because it cannot adjust the light direction.

[0004] Complex rotating lamp heads achieve continuous angle adjustment in the horizontal and vertical directions through damping shafts, gear transmissions, or multi-joint connection mechanisms, which can meet the precise needs of task lighting or directional lighting and are suitable for scenarios such as industrial workbenches, medical diagnostic equipment, and commercial display cases. However, their high structural complexity leads to increased manufacturing costs, and regular maintenance is required to maintain adjustment flexibility, which increases usage costs and maintenance burden.

[0005] In summary, existing fixed lamp heads cannot meet the needs of light direction adjustment, while complex rotating lamp heads have problems such as complex structure, high cost and troublesome maintenance. There is an urgent need for a T8 LED tube lamp head design that can both achieve light direction adjustment to adapt to directional lighting scenarios and simplify the structure, reduce costs and reduce maintenance requirements.

[0006] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0007] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an LED tube that can flexibly adjust the direction of light and has the advantage of simple structure, thus solving the technical problems of existing fixed lamp heads that cannot be adjusted and complex rotating lamp heads that are costly and difficult to maintain.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An LED tube includes a lighting tube, an electrical connector, and two lamp head assemblies, which are respectively fixed at both ends of the lighting tube. Each lamp head assembly includes a lamp head body and a lamp head cover. One end of the lamp head body is fixedly connected to the lighting tube, and the lamp head cover is disposed at the other end of the lamp head body and is rotatable relative to the lamp head body. The electrical connector is disposed on the lamp head cover and is used to realize the electrical connection between the LED tube and an external device.

[0009] The LED tube includes a tube body and a lamp plate. The two ends of the tube body are fixedly connected to the two lamp head assemblies, and the lamp plate is fixedly disposed inside the tube body.

[0010] The LED tube also includes a driver board, which is disposed within any of the lamp head bodies and is electrically connected to the electrical connector and the lamp board respectively.

[0011] In the LED tube, a limiting block is provided on one inner wall of the tube body, and a first limiting groove is provided in the middle of the limiting block. The lamp board is located in the first limiting groove, and the lamp board is fixedly connected to the inner wall of the tube body by thermally conductive adhesive. The lamp board is an LED aluminum substrate lamp board, and multiple LED beads are evenly arranged on the lamp board.

[0012] In the LED tube, the main body of the tube is a glass tube, a plastic tube, or a semi-plastic aluminum tube, and the outer surface of the main body of the tube is covered with a high-transparency film.

[0013] In the LED tube, limit groups are respectively provided on the inner walls of both sides of the lamp head body. The limit group includes two limit strips arranged opposite each other, and a second limit groove is formed between the two limit strips. The two sides of the drive plate are respectively connected to the two second limit grooves.

[0014] In the LED tube, a positioning platform is provided at one end of the lamp head body, a rotating platform is provided at the other end of the lamp head body, and a rotating block is provided on the lamp head cover; the end of the lamp tube body abuts against the positioning platform, and the rotating block slides with the inner side of the rotating platform to drive the lamp head cover to rotate relative to the lamp head body.

[0015] In the LED tube, two first positioning blocks and multiple guide blocks are provided on the inner sidewall of the lamp head body, and two second positioning blocks are provided on the lamp head cover. The first positioning blocks and the guide blocks are located between the rotating platform and the lamp head cover. The multiple guide blocks are evenly arranged around the inner sidewall of the lamp head body, and guide grooves are formed between adjacent guide blocks. Two first positioning blocks are arranged opposite each other, and the first positioning blocks are located in any of the guide grooves. The second positioning blocks are connected to any of the guide grooves, and the first positioning blocks cooperate with the second positioning blocks to realize the rotation limit of the lamp head cover. In the LED tube, multiple first indicator grooves are formed on the outer wall of the lamp head cover, and the number of the first indicator grooves is the same as the number of the guide grooves; the outer wall of the lamp head body is provided with a second indicator groove, and the first indicator groove and the second indicator groove cooperate to indicate the rotation angle of the lamp head cover.

[0016] In the LED tube, the electrical connector includes two copper pins, and the lamp head cover has two connection holes. The two copper pins are respectively connected to the two connection holes, and the two copper pins are respectively electrically connected to the driver board. A limit ring is provided on the copper pin, and the diameter of the limit ring is larger than the diameter of the connection hole.

[0017] Beneficial effects: This utility model provides an LED tube that, compared to existing fixed lamp heads, features a simple design where the lamp head cover can rotate relative to the lamp head body. This allows for adjustment of the relative angle between the electrical connector and the external lamp holder, thereby changing the light emission direction of the lamp tube and meeting the directional lighting needs of scenarios such as industrial workbenches and medical diagnostic equipment. Compared to complex rotating lamp heads, this design eliminates the need for complex components such as damping shafts and gear transmissions. Direction adjustment can be achieved simply by the direct rotation of the lamp head cover and the lamp head body. This reduces structural complexity, manufacturing costs, and the absence of easily damaged parts, eliminating the need for regular maintenance and significantly reducing operating costs. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the LED tube provided by this utility model; Figure 2 An exploded view of the LED tube and any lamp holder assembly provided by this utility model; Figure 3 A schematic diagram of the connection structure between the driver board and the lamp holder assembly provided by this utility model.

[0019] Explanation of main component symbols: 1-Lighting tube, 11-Lamp tube body, 111-Limiting block, 21-Copper needle, 211-Limiting ring, 3-Lamp head assembly, 31-Lamp head body, 311-Limiting group, 312-Positioning platform, 313-Rotating platform, 314-First positioning block, 315-Guide block, 316-Second indicator groove, 32-Lamp head cover, 321-Rotating block, 322-Second positioning block, 323-First indicator groove, 4-Drive board. Detailed Implementation

[0020] This utility model provides an LED tube. To make the purpose, technical solution and effect of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments.

[0021] In the description of this utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation" and "connection", etc. should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Please see Figures 1 to 3 This utility model provides an LED tube, including a lighting tube 1, an electrical connector, and two lamp head assemblies 3. The two lamp head assemblies 3 are respectively fixed at both ends of the lighting tube 1. Each lamp head assembly 3 includes a lamp head body 31 and a lamp head cover 32. One end of the lamp head body 31 is fixedly connected to the lighting tube 1, and the lamp head cover 32 is disposed at the other end of the lamp head body 31. The lamp head cover 32 can rotate relative to the lamp head body 31. The electrical connector is disposed on the lamp head cover 32 and is used to realize the electrical connection between the LED tube and an external device.

[0023] This application discloses an LED lamp tube. Compared with existing fixed lamp heads, this application has a simple design where the lamp head cover 32 can rotate relative to the lamp head body 31. This allows for adjustment of the relative angle between the electrical connector and the external lamp holder, thereby changing the light emission direction of the lighting tube 1 and meeting the directional lighting needs of scenarios such as industrial workbenches and medical diagnostic equipment. Compared with complex rotating lamp heads, this application eliminates the need for complex components such as damping shafts and gear transmissions. Direction adjustment can be achieved simply by the direct rotation of the lamp head cover 32 and the lamp head body 31. This reduces structural complexity, manufacturing costs, and the absence of easily damaged parts, eliminating the need for regular maintenance and significantly reducing operating costs.

[0024] In this embodiment, the two lamp head assemblies 3 are respectively fixedly disposed at both ends of the lighting tube 1 by snap-fit ​​connection or adhesive bonding, forming an integrated structure of the lamp tube body 11 and the lamp head assemblies 3 at both ends; each lamp head assembly 3 consists of a lamp head body 31 and a lamp head cover 32. One end of the lamp head body 31 is positioned and fixed to the end of the lighting tube 1 by means of a positioning platform 312, and the other end of the lamp head body 31 is an open structure; the lamp head cover 32 covers the open area and forms a rotational fit with the lamp head body 31, so that the lamp head cover 32 can rotate around the axis of the lamp head body 31; the electrical connector is disposed on the lamp head cover 32 to realize the electrical connection between the LED tube and the external power supply device, such as the lamp holder, to provide working power to the LED tube.

[0025] Further, please refer to Figure 1 and Figure 2 The lighting tube 1 includes a tube body 11 and a lamp plate. The two ends of the tube body 11 are respectively fixedly connected to the two lamp head assemblies 3, and the lamp plate is fixedly installed inside the tube body 11.

[0026] In this embodiment, the lamp tube body 11 is a hollow strip structure, and its two ends are fixedly connected to the lamp head body 31 of the two lamp head assemblies 3 to form the outer shell support of the lamp tube; the lamp plate is strip-shaped and adapted to the lamp tube body 11. It is fixed in the internal cavity of the lamp tube body 11 by pasting, and the light-emitting surface of the lamp plate faces the light-transmitting side of the lamp tube body 11.

[0027] Further, please refer to Figure 3 The LED tube also includes a driver board 4, which is disposed in any of the lamp head bodies 31 and is electrically connected to the electrical connector and the lamp board respectively.

[0028] In this embodiment, the driver board 4 is the existing T8 LED tube driver board 4, and the circuit structure of the driver board 4 is not improved in this embodiment. The driver board 4 is set inside any lamp head body 31. Its input end is electrically connected to the electrical connector through a wire to receive external AC power. Its output end is electrically connected to the electrode of the lamp board through a wire to convert the AC power into the DC power required by the lamp beads. By setting the driver board 4 inside the lamp head body 31, the interference of external dust and moisture on the driving circuit can be avoided. At the same time, the lamp head body 31 can buffer the impact and reduce the risk of damage to the driver board 4.

[0029] Further, please refer to Figure 2A limiting block 111 is provided on one inner wall of the lamp tube body 11. A first limiting groove is provided in the middle of the limiting block 111. The lamp plate is located in the first limiting groove and is fixedly connected to the inner wall of the lamp tube body 11 by thermally conductive adhesive. The lamp plate is an LED aluminum substrate lamp plate, and multiple LED beads are evenly arranged on the lamp plate.

[0030] In this embodiment, the limiting block 111 extends along the length of the lamp tube body 11, and its cross-section is U-shaped with a first limiting groove in the middle; the lamp plate is embedded in the first limiting groove to achieve radial positioning; at the same time, thermally conductive adhesive, such as silicone-based thermally conductive adhesive, is filled between the back of the lamp plate and the inner wall of the lamp tube body 11, and the thermally conductive adhesive is pressed and cured to achieve a tight connection between the lamp plate and the lamp tube body 11.

[0031] In this embodiment, the lamp tube body 11 can effectively block external mechanical impact, dust erosion and moisture penetration, providing protection for the lamp board. At the same time, the radial movement of the lamp board is restricted by the precise cooperation between the limiting block 111 on the inner wall of the lamp tube body 11 and the first limiting groove. Combined with the curing and bonding effect of the thermally conductive adhesive, the axial movement and shaking of the lamp board are restricted, thus achieving rigid fixation of the lamp board inside the lamp tube body 11. This avoids the risk of displacement under vibration environment and ensures the stability of light emission. Furthermore, the heat conduction path of the thermally conductive adhesive optimizes the heat dissipation efficiency of the lamp board, preventing local overheating of the lamp board from causing light decay or damage to the LED beads, and ensuring long-term stable operation of the LED lamp tube.

[0032] In this embodiment, the lamp board adopts an LED aluminum substrate structure. The aluminum substrate lamp board, through close cooperation with the thermally conductive adhesive and the lamp tube body 11, forms a complete heat conduction path of lamp beads, aluminum substrate, thermally conductive adhesive, and lamp tube body 11. Its heat dissipation efficiency is significantly higher than that of traditional FR4 substrate lamp boards. On the light-emitting surface of the lamp board, multiple LED beads are evenly arranged through a reflow soldering process. The lamp beads are connected in series or a series-parallel hybrid connection to ensure that the overall lighting function is not affected when a single lamp bead fails. Moreover, their uniform distribution effectively avoids the formation of light spots or dark areas. Combined with the optimized design of the high-transparency film, the spatial illumination uniformity of the lamp tube is greatly improved, meeting the requirements of light consistency for directional lighting applications.

[0033] Preferably, the lamp tube body 11 is a glass tube, a plastic tube, or a semi-plastic aluminum tube, and the outer surface of the lamp tube body 11 is covered with a high-transparency film.

[0034] In this embodiment, the glass tube is preferably high borosilicate glass, suitable for commercial display cases, offices and other scenarios where high light transmittance is required; the plastic tube is preferably polycarbonate or acrylic, suitable for humid, vibrating industrial workshops or outdoor scenarios; the semi-plastic aluminum tube has a plastic outer layer and an aluminum foil or aluminum tube inner layer, suitable for high-temperature environments or high-power lamp tubes with high heat dissipation requirements; regardless of the material of the lamp tube body 11, the outer surface of the lamp tube body 11 is covered with a high-transmittance film, such as a PET-based high-transmittance film. The high-transmittance film improves the light utilization rate while preventing scratches and yellowing on the outer surface of the lamp tube body 11 due to friction or ultraviolet radiation, thus extending the appearance life and light transmittance stability of the LED lamp tube.

[0035] Further, please refer to Figure 2 and Figure 3 The inner walls on both sides of the lamp head body 31 are respectively provided with limit groups 311. The limit group 311 includes two limit strips arranged opposite each other, and a second limit groove is formed between the two limit strips. The two sides of the drive plate 4 are respectively connected to the two second limit grooves.

[0036] In this embodiment, to prevent the drive plate 4 from shaking inside the lamp head body 31 and causing poor wire contact, limit groups 311 are integrally formed on both sides of the inner wall of the lamp head body 31. Each limit group 311 consists of two oppositely arranged limit strips, which extend along the length of the lamp head body 31, and a second limit groove is formed between the two limit strips. The two sides of the drive plate 4 are respectively embedded in the two second limit grooves, and the radial positioning of the drive plate 4 is achieved through the second limit grooves, so as to avoid wire pulling and poor contact caused by the displacement of the drive plate 4 during transportation or use. At the same time, the ends of the drive plate 4 can be further fixed by hot melt glue or buckles.

[0037] Further, please refer to Figure 2 and Figure 3 One end of the lamp head body 31 is provided with a positioning platform 312, and the other end of the lamp head body 31 is provided with a rotating platform 313. The lamp head cover 32 is provided with a rotating block 321. The end of the lamp tube body 11 abuts against the positioning platform 312, and the rotating block 321 slides with the inner side of the rotating platform 313 to drive the lamp head cover 32 to rotate relative to the lamp head body 31.

[0038] In this embodiment, a positioning platform 312 and a rotating platform 313 are integrally formed at both ends of the lamp head body 31. The positioning platform 312 is located at the end of the lamp head body 31 close to the lamp tube body 11, and its end face is an annular stepped surface. The end of the lamp tube body 11 abuts against the stepped surface to achieve coaxial positioning of the lamp tube body 11 and the lamp head body 31. The rotating platform 313 is located at the end of the lamp head body 31 away from the lamp tube body 11, and its inner sidewall is a smooth annular surface. A rotating block 321 is integrally formed on the inner side of the lamp head cover 32, that is, on the side of the lamp head cover 32 facing the lamp head body 31. The rotating block 321 is embedded between the inner sidewall of the rotating platform 313 and the inner wall of the lamp head body 31 to form a sliding fit, so that the lamp head cover 32 can rotate smoothly around the axis of the lamp head body 31 without radial shaking, improving the user's adjustment experience.

[0039] Further, please refer to Figure 2 and Figure 3 The lamp head body 31 has two first positioning blocks 314 and multiple guide blocks 315 on its inner sidewall, and the lamp head cover 32 has two second positioning blocks 322. The first positioning blocks 314 and the guide blocks 315 are located between the rotating platform 313 and the lamp head cover 32. The multiple guide blocks 315 are evenly arranged around the inner sidewall of the lamp head body 31, and guide grooves are formed between adjacent guide blocks 315. The two first positioning blocks 314 are arranged opposite to each other, and the first positioning blocks 314 are located in any of the guide grooves. The second positioning blocks 322 are connected to any of the guide grooves. The first positioning blocks 314 and the second positioning blocks 322 cooperate to realize the rotation limit of the lamp head cover 32. To prevent excessive rotation of the lamp head cover 32 from causing internal wire entanglement or damage, an angle limiting structure is designed in this embodiment. Specifically, two first positioning blocks 314 and multiple guide blocks 315 are integrally formed on the inner wall of the lamp head body 31, in the area between the rotating platform 313 and the lamp head cover 32. The guide blocks 315 are evenly arranged around the inner wall of the lamp head body 31, and guide grooves are formed between adjacent guide blocks 315. The two first positioning blocks 314 are arranged opposite each other, and each first positioning block 314 is located in the middle of any guide groove. Two second positioning blocks 314 are integrally formed on the inner wall of the lamp head cover 32. Positioning blocks 322, two of the second positioning blocks 322 are respectively embedded in any one of the guide grooves; when the lamp head cover 32 rotates, the second positioning block 322 slides along the guide groove, adjusting the angle range from 0° to 90°, until it abuts against the first positioning block 314, at which point the lamp head cover 32 can no longer rotate; through the cooperation of the first positioning block 314 and the second positioning block 322, the rotation angle of the lamp head cover 32 can be limited to avoid wire tangling, and the cooperation of the guide block 315 and the guide groove can guide the sliding direction of the second positioning block 322, preventing the lamp head cover 32 from shifting or getting stuck during rotation, thus improving the user experience.

[0040] Further, please refer to Figure 2 The lamp head cover 32 has multiple first indicator grooves 323 on its outer side wall, and the number of first indicator grooves 323 is the same as the number of guide grooves; the lamp head body 31 has a second indicator groove 316 on its outer side wall, and the first indicator grooves 323 and the second indicator grooves 316 cooperate to indicate the rotation angle of the lamp head cover 32.

[0041] In this embodiment, the first indicator groove 323 is evenly distributed around the lamp head cover 32, and the second indicator groove 316 is one or two marking lines on the outer wall of the lamp head body 31. When the lamp head cover 32 is rotated to a specific angle, a certain first indicator groove 323 aligns with the second indicator groove 316. The rotation angle is quantitatively indicated by visual alignment, allowing the user to intuitively judge the current angle through the alignment of the indicator grooves without the need for additional tools to measure, thus improving adjustment efficiency. At the same time, the number of indicator grooves corresponds one-to-one with the guide grooves, which can synchronously reflect the limit position, realize the visualization and precision of angle adjustment, avoid angle deviation caused by blind adjustment, and improve the ease of use of the product.

[0042] Further, please refer to Figure 2 The electrical connector includes two copper pins 21. The lamp cap 32 has two connection holes. The two copper pins 21 are respectively connected to the two connection holes and are electrically connected to the drive plate 4. A limit ring 211 is provided on the copper pin 21. The diameter of the limit ring 211 is larger than the diameter of the connection hole.

[0043] In this embodiment, the electrical connector uses two copper pins 21. Two connection holes are opened in the central area of ​​the lamp head cover 32. The diameter of the connection holes matches the diameter of the copper pins 21. The two copper pins 21 are inserted into the two connection holes respectively, and the flat end of the copper pin 21 extends out of the inner side of the lamp head cover 32. They are electrically connected to the input wire of the driver board 4 by welding. A limiting ring 211 is integrally formed in the middle of the copper pin 21. The limiting ring 211 fits against the outer wall of the lamp head cover 32 to realize the installation limit of the copper pin 21 and prevent the flat end of the copper pin 21 from extending excessively out of the inner side of the lamp head cover 32, which would damage the driver board 4.

[0044] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. An LED tube, characterized in that, The device includes a lighting tube, an electrical connector, and two lamp holder assemblies, which are respectively fixed at both ends of the lighting tube. Each lamp holder assembly includes a lamp holder body and a lamp holder cover. One end of the lamp holder body is fixedly connected to the lighting tube, and the lamp holder cover is disposed at the other end of the lamp holder body and is rotatable relative to the lamp holder body. The electrical connector is disposed on the lamp holder cover and is used to realize the electrical connection between the LED tube and an external device.

2. The LED tube according to claim 1, characterized in that, The lighting tube includes a tube body and a lamp plate. The two ends of the tube body are respectively fixedly connected to the two lamp head assemblies, and the lamp plate is fixedly disposed inside the tube body.

3. The LED tube according to claim 2, characterized in that, It also includes a driver board, which is disposed in any of the lamp head bodies and is electrically connected to the electrical connector and the lamp board respectively.

4. An LED tube according to claim 2, characterized in that, A limiting block is provided on one side of the inner wall of the lamp tube body, and a first limiting groove is provided in the middle of the limiting block. The lamp plate is located in the first limiting groove, and the lamp plate is fixedly connected to the inner wall of the lamp tube body by thermally conductive adhesive. The lamp plate is an LED aluminum substrate lamp plate, and multiple LED beads are evenly arranged on the lamp plate.

5. An LED tube according to claim 2, characterized in that, The main body of the lamp tube is a glass tube, a plastic tube, or a semi-plastic aluminum tube, and the outer surface of the main body of the lamp tube is covered with a high-transparency film.

6. An LED tube according to claim 3, characterized in that, Limiting groups are provided on the inner walls of both sides of the lamp head body. Each limiting group includes two opposing limiting strips, and a second limiting groove is formed between the two limiting strips. The two sides of the drive plate are respectively connected to the two second limiting grooves.

7. An LED tube according to claim 2, characterized in that, A positioning platform is provided at one end of the lamp head body, and a rotating platform is provided at the other end of the lamp head body. A rotating block is provided on the lamp head cover. The end of the lamp tube body abuts against the positioning platform, and the rotating block slides with the inner side of the rotating platform to drive the lamp head cover to rotate relative to the lamp head body.

8. An LED tube according to claim 7, characterized in that, The lamp head body has two first positioning blocks and multiple guide blocks on its inner sidewall, and the lamp head cover has two second positioning blocks. The first positioning blocks and the guide blocks are located between the rotating platform and the lamp head cover. The multiple guide blocks are evenly arranged around the inner sidewall of the lamp head body, and guide grooves are formed between adjacent guide blocks. The two first positioning blocks are arranged opposite each other, and the first positioning blocks are located in any of the guide grooves. The second positioning blocks are connected to any of the guide grooves, and the first positioning blocks cooperate with the second positioning blocks to limit the rotation of the lamp head cover.

9. An LED tube according to claim 8, characterized in that, The outer wall of the lamp head cover has multiple first indicator grooves, the number of which is the same as the number of guide grooves; the outer wall of the lamp head body is provided with a second indicator groove, the first indicator groove and the second indicator groove cooperate to indicate the rotation angle of the lamp head cover.

10. An LED tube according to claim 3, characterized in that, The electrical connector includes two copper pins, and the lamp cap has two connection holes. The two copper pins are respectively connected to the two connection holes, and the two copper pins are respectively electrically connected to the drive board. A limit ring is provided on the copper pin, and the diameter of the limit ring is larger than the diameter of the connection hole.

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