LED straight lamp

Abstract

An LED lamp comprises a lamp body (10), two lamp caps (20), two power modules (30) and a light source module (40). The lamp caps (20) are arranged at the two ends of the lamp body (10), the power module (30) comprises a power circuit board (310) and an electronic component (320), and the power module (30) is at least located in one of two containing spaces formed by the lamp body (10) and the lamp caps (20). The light source module (40) is located in the lamp body (10), the light source module (40) comprises a lamp panel (410) and a light source (420), the light source (420) is arranged on the lamp panel (410), the lamp panel (410) is provided with a connecting area (411) and a light emitting area (412), the connecting area (411) is connected with the power supply circuit board (310) and forms a folding area (60), the connecting area (411) located in the folding area (60) is provided with a first bending part (4111) and a second bending part (4112), and the first bending part (4111) and the second bending part (4112) are connected with the light emitting area (412). By at least one method of arranging a piece arrangement prohibiting area in a folding area (60), arranging an isolation object (4113) in the folding area (60) and changing the shape of the folding area (60) in a lamp body (10), the electrical distance between a first bending part (4111) and a power supply module (30) and the electrical distance between a second bending part (4112) and a lamp panel (410) located below the second bending part (4112) are increased, and therefore the lamp panel (410) can be turned on or off. The phenomenon of sparking or arc discharge when the LED lamp works is avoided, and the safety of the LED lamp is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of LED lighting devices, and particularly to an LED straight tube lamp. Background Art

[0002] LED lamps have many advantages such as long service life, small size, energy saving, etc., so they are widely used in the market and gradually replace the existing incandescent lamps and fluorescent lamps.

[0003] When a flexible circuit board is used as part or the whole of the lamp strip board in an LED straight tube lamp product, there are often folding areas at both ends of the LED straight tube lamp. This folding area is similar to an "S" shape, which makes the electrical spacing in this area smaller. The electrical spacing includes the spacing formed by the flexible circuit board in the folding area and the spacing between the flexible circuit board and the power circuit board. Usually, the phenomenon of arcing may occur occasionally when using a general driving scheme. If a boost driving scheme (boost boost) is adopted, the phenomenon of arcing is more likely to occur. At this time, the output voltage at the LED end will be higher than the input voltage of the LED straight tube lamp from the outside. In this way, there is a risk and potential safety hazard of arcing and arc-drawing on the flexible circuit board.

[0004] In summary, in view of the deficiencies and defects of the existing LED straight tube lamps in the prior art, how to design an LED lamp to reduce the phenomenon of arcing and arc-drawing during use and improve safety is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the related art, the purpose of the present invention is to provide an LED straight tube lamp to avoid the phenomenon of arcing or arc-drawing during the use of the LED lamp.

[0006] To achieve the above and other related objectives, the first aspect of the present application discloses an LED straight tube lamp, which is characterized in that it includes: a lamp body having opposite first and second ends; two lamp heads respectively provided at the first and second ends of the lamp body; a power module including a circuit board, electronic components and welding points, the electronic components and the welding points are arranged on the circuit board, the power module is arranged in the accommodation space formed by the lamp body and the lamp head, the power module has a first surface and a second surface, the first surface and the second surface are arranged in parallel, the electronic components are at least arranged on the first surface, and the second surface includes a first area and a second area; a light source module located in the lamp body, the light source module includes a lamp board and a light source, the light source is arranged on the lamp board, the lamp board has a connection area and a light-emitting area, the connection area is connected to the power module and forms a folding area, the folding area overlaps with the second area in the radial direction of the lamp body, and no electronic components and welding points are arranged in the second area.

[0007] In some embodiments disclosed in the first aspect of the present application, the light source is arranged in the light-emitting area, and the light-emitting area does not overlap with the circuit board in the radial direction of the lamp body.

[0008] The second aspect of the present application discloses an LED straight tube lamp, which is characterized in that it includes: a lamp body having opposite first and second ends; two lamp heads respectively provided at the first and second ends of the lamp body; a power module including a circuit board, the power module is arranged in the accommodation space formed by the lamp body and the lamp head; a light source module located in the lamp body, the light source module includes a lamp board and a light source, the lamp board has a connection area and a light-emitting area, the light source is arranged in the light-emitting area of the lamp board, the connection area is connected to the power module and forms a folding area, the folding area overlaps with the circuit board in the radial direction of the lamp body, and an isolator is respectively arranged between the folding area and the circuit board or between the folding area and the lamp board below it.

[0009] In some embodiments disclosed in the second aspect of the present application, for the LED straight tube lamp as claimed in claim 3, it is characterized in that the folding area located in the connection area has a first bending part and a second bending part, and an isolator is arranged on the surface of the circuit board facing the first bending part, and an isolator is arranged on the surface of the lamp board facing the second bending part.

[0010] In some embodiments disclosed in the second aspect of the present application, the isolator is a high-temperature tape.

[0011] In certain embodiments disclosed in the second aspect of the present application, the folding area located in the connection area has a first bending part and a second bending part, and an isolator is provided on the surface of the first bending part close to the circuit board, and an isolator is provided on the surface of the second bending part close to the lamp board.

[0012] In certain embodiments disclosed in the second aspect of the present application, the isolator is white glue.

[0013] In certain embodiments disclosed in the second aspect of the present application, the isolator is attached to the connection area of the lamp board.

[0014] In certain embodiments disclosed in the second aspect of the present application, the isolator is a cover film.

[0015] In certain embodiments disclosed in the second aspect of the present application, based on the LED straight tube lamp disclosed in the above second aspect, the circuit board includes a first surface and a second surface, the first surface and the second surface are arranged in parallel, and no electronic components and welding points are provided in the overlapping part of the folding area and the second surface in the radial direction of the lamp body, the light source is arranged in the light emitting area, and the light emitting area does not overlap with the circuit board.

[0016] The third aspect of the present application discloses an LED straight tube lamp, which is characterized in that it includes: a lamp body having opposite first and second ends; two lamp heads respectively provided at the first and second ends of the lamp body; a power module including a circuit board, the power module is arranged in the accommodation space formed by the lamp body and the lamp head; a light source module, the light source module is located in the lamp body, the light source module includes a lamp board and a light source, the light source is arranged on the light emitting surface of the lamp board, the lamp board has a connection area and a light emitting area, the connection area is connected to the power module and forms a folding area, and the folding area is in a "Z" shape.

[0017] In certain embodiments disclosed in the third aspect of the present application, the unfolded length of the folding area is 25 - 35 mm.

[0018] In certain embodiments disclosed in the third aspect of the present application, the unfolded length of the folding area is 30 mm.

[0019] In certain embodiments disclosed in the third aspect of the present application, an isolator is provided between the folding area and the circuit board, and an isolator is provided between the folding area and the lamp board below it.

[0020] In some embodiments disclosed in the third aspect of the present application, based on the LED straight tube lamp disclosed in the above third aspect, it is characterized in that the circuit board includes a first surface and a second surface, the first surface and the second surface are arranged in parallel, no electronic components and soldering points are provided in the overlapping part of the folding area and the second surface in the radial direction of the lamp body, the light source is arranged in the light emitting area, and the light emitting area does not overlap with the circuit board. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the LED lamp according to an embodiment of the present application.

[0022] Figure 2 is a sectional view of the LED lamp according to an embodiment of the present application.

[0023] Figure 3 is Figure 2 an enlarged view of part A of

[0024] Figure 4 is an exploded schematic diagram of the LED lamp according to an embodiment of the present application.

[0025] Figure 5 is another embodiment of the present application Figure 2 an enlarged view of part A of

[0026] Figure 6 is another embodiment of the present application Figure 2 an enlarged view of part A of. And

[0027] Figure 7 is another embodiment of the present application Figure 2 an enlarged view of part A of

[0028] In the figure: 10, lamp body; 110, first end; 120, second end; 20, lamp head; 30, power module; 310, power circuit board; 320, electronic components; 40, light source module; 410, lamp board; 411, connection area; 4111, first bending part; 4112, second bending part; 4113, isolator; 412, light emitting area; 420, light source; 50, conductive pin; 60, folding area. Detailed Embodiments

[0029] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant accompanying drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described below. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive. Directions such as "first", "second", "third", "axial direction", "above", "below", etc. in the following text are for more clearly indicating the structural position relationship and are not limitations to the present application. In the present application, the definitions of "vertical", "horizontal", and "parallel" are as follows: including the cases of ±30% based on the standard definitions. For example, vertical generally refers to an angle of 90 degrees relative to the reference line, but in the present application, vertical refers to the cases within 60 degrees to 120 degrees.

[0030] Referring to Figures 1 to 3 , which is one of the embodiments of the present application. The LED lamp includes: a lamp body 10, two lamp heads 20, a power module 30, and a light source module 40. The two lamp heads 20 are respectively arranged at both ends of the lamp body 10. The power module 30 is located in the accommodation space formed by the lamp heads 20 and is electrically connected to the light source module 40. The light source module 40 is located inside the lamp body 10. The number of the power modules 30 is one or two. When the number of the power modules 30 is two, they are respectively located in the accommodation spaces of the two lamp heads 20 and are electrically connected to both ends of the light source module 40.

[0031] Specifically, the lamp body 10 has opposite first end 110 and second end 120. On the one hand, the lamp body 10 is used to protect the light source module 40, prevent the light source module 40 from being damaged and contaminated by foreign objects, and extend the service life of the light source module 40. On the other hand, it adjusts the light emitted by the light source module 40, diffuses the light emitted by the light source module 40, makes the light softer, avoids direct glare of the LED light, and also has a decorative function, etc. The lamp body 10 can be cylindrical, cuboid, U-shaped, etc. In this embodiment, the lamp body 10 is a slender cylinder. The material of the lamp body 10 can be plastic, glass, or PC material, etc. In this embodiment, the lamp body 10 is made of glass material with a reinforcement part to avoid the problems of easy breakage of traditional glass lamp tubes, electric shock accidents caused by breakage and leakage, and easy heat deformation of plastic lamp tubes.

[0032] Two lamp holders 20 are respectively sleeved on the first end 110 and the second end 120 of the lamp body 10 and have accommodating spaces. The joining manner of the lamp holder 20 and the lamp body 10 can be through adhesives or snap joints, etc. Among them, one lamp holder 20 is arranged at the first end 110 of the lamp body 10, and the other lamp holder 20 is arranged at the second end 120 of the lamp body 10. Conductive pins 50 are also arranged on the lamp holder 20. The conductive pins 50 are arranged at the end of the lamp holder 20. Two conductive pins 50 are arranged on each lamp holder 20. The conductive pins 50 are used for electrically connecting with an external power supply. The conductive pins 50 can be solid conductive pins 50 or hollow conductive pins 50. Although this embodiment is described in the form of conductive pins, as long as there is a structural design with the function of electrically connecting with the outside world, it belongs to the concept of this application, and other implementation modes will not be listed here. In other embodiments of this application, ventilation holes (not shown) are also arranged at the end of the lamp holder 20. The ventilation holes are used for gas flow. The gas can be air. The air can flow from the inside of the LED lamp to the outside of the LED lamp through the hollow holes, or from the outside of the LED lamp to the inside of the LED lamp through the hollow holes. The flowing gas can take away the heat inside the LED lamp, effectively reducing the temperature of the LED lamp and improving the service life of the LED lamp. The lamp holder 20 can be made of metal material, plastic material or a composite material of metal and plastic.

[0033] The power supply module 30 is used to convert an external power supply (mains electricity) into a specific voltage and current to drive the light source module 40 to emit light. The power supply module 30 is at least located in one of the two accommodating spaces formed by the lamp holder 20 and the lamp body 10. Since there may be an overlapping area in the connection between the lamp holder 20 and the lamp body 10, the specific position of the power supply module 30 may be at least partially accommodated in the end area of the lamp body 10. To make it easy for those skilled in the art to understand, the following description uses a unified narrative method that the power supply module 30 is arranged in the accommodating space inside the lamp holder, but other possible situations are not excluded. This is specially stated here. When the number of power supply modules 30 is two, one power supply module 30 is close to the first end 110 of the lamp body 10, and the other power supply module 30 is close to the second end 120 of the lamp body 10. When the number of power supply modules 30 is one, either end of the lamp body 10 can have the power supply module 30. The power supply module 30 can be connected to the two lamp holders 20 respectively by means of snap connection, bonding or other methods. In other embodiments of this application, the power supply module 30 can also be directly placed in the accommodating space of the lamp holder 20 and only complete the electrical connection with the conductive pins 30 and the light source module 40. The conductive pins 50 pass through the end of the lamp holder 20 and are electrically connected to the power supply module 30. The power supply module 30 includes a power supply circuit board 310 and electronic components 320. The electronic components 320 are arranged on the power supply circuit board 310. The electronic components 320 include but are not limited to voltage conversion devices. The power supply module 30 is respectively connected to the external power supply through the conductive pins 50 and supplies power to the light source module 40.

[0034] Please also refer to Figure 4, the light source module 40 is located inside the lamp body 10. In a specific embodiment of the present application, the light source module 40 includes a lamp board 410 and a light source 420. The light source 420 is disposed on the lamp board 410. The light source 420 can be an LED lamp bead, and it can emit light for illumination when powered on. Any end of the lamp board 410 has a connection area 411 and a light-emitting area 412 connected to the connection area 411. The light-emitting area 412 can be the area where the light source 420 is disposed, and the connection area 411 can be the area where the light source 420 is not disposed. In other specific embodiments of the present application, when the number of power modules 30 is two, the lamp board 410 has two connection areas 411, which are respectively connected to the two power modules 30, and the light-emitting area 412 is disposed between the two connection areas 411. Before the connection area 411 is connected to the power circuit board 310, the end of the connection area 411 exposes the first end 110 or the second end 120 of the lamp body 10, and the end of the connection area 411 exposed from the lamp body 10 is connected to the power circuit board 310. The connection methods include soldering or electrical connection through other conductive materials. Then, the connection area 411 and the power circuit board 310 are installed into the lamp head 20 or the lamp body 10 together to form a folding area 60. When the number of power modules 30 is two, there is a folding area 60 at each of the first end 110 and the second end 120 of the lamp body 10. Please refer to Figure 3 as shown. The connection area 411 located in the folding area 60 has a first bending portion 4111 and a second bending portion 4112. In the unfolded (non-bent) state of the lamp board 410, the distance between the area where the first bending portion 4111 is located and the power circuit board 310 is greater than the distance between the area where the second bending portion 4112 is located and the power circuit board 310. In other words, the area where the second bending portion 4112 is located is closer to the power circuit board 310 than the area where the first bending portion 4111 is located. After the folding area 60 is formed, the first bending portion 4111 is close to the end 110 / 120 of the lamp body 10, and the second bending portion 4112 is away from the end 110 / 120 of the lamp body 10.

[0035] No light source 420 is provided on the connection area 411 located in the folding area 60, and a light source 420 is provided on the light-emitting area 412. When powered on, the light-emitting area 412 can emit light for illumination, and the light-emitting area 412 can be fixed to the inner peripheral surface of the lamp body 10 by an adhesive. The connection area 411 is mainly made of a flexible material. The light-emitting area 412 can be made of a flexible material or a rigid material, preferably a flexible material. Conductors are provided in the connection area 411 and the light-emitting area 412. The conductors can be buried in the insulating material of the plate body or formed on the surface of the plate body. The conductors can be copper wires formed by printing or plating. The conductors are electrically connected to the power supply circuit board 310 and the light source 420 respectively. When both the two connection areas 411 and the light-emitting area 412 are made of flexible materials, the two connection areas 411 and the light-emitting area 412 can be integrally formed, and the connection area 411 and the light-emitting area 412 do not need to be connected by welding. On the one hand, it is convenient for production and cost-saving, and on the other hand, the performance of the lamp board 410 can be made more stable. In another embodiment of the present application, the connection area 411 and the light-emitting area 412 of the lamp board 410 are independent components of different materials. For example, the light-emitting area 412 is a rigid substrate (FR4, aluminum substrate, etc.), and the connection area 411 is a flexible circuit board (FPC). The two are electrically connected by welding or other connection methods.

[0036] Referring to Figure 3 , the distance between the first bending portion 4111 of the connection area 411 and the power supply circuit board 310 is very close, resulting in a small electrical distance between the first bending portion 4111 of the connection area 411 and the power supply circuit board 310. When powered on, arcing or sparking is likely to occur between the first bending portion 4111 and the power supply circuit board 310. In addition, the distance between the second bending portion 4112 of the connection area 411 and the lamp board 410 below the second bending portion 4112 is also very close, resulting in a small electrical distance between the second bending portion 4112 of the connection area 411 and the lamp board 410 below the second bending portion 4112. When powered on, arcing or sparking is likely to occur between the second bending portion 4112 and the lamp board 410 below the second bending portion 4112. The electrical distance refers to the air gap distance with a very low probability of discharge between live parts or between a live part and a grounded component during live working. In particular, when the power supply module 30 adopts a boost scheme, the LED lamp is more likely to generate arcing or sparking, and at this time, a larger electrical distance is required to effectively avoid the generation of arcing and sparking.

[0037] Specifically, a component-free area is provided on the power circuit board 310 in the folding area 60. In an embodiment provided by the present application, the power circuit board 310 includes a first surface 3101 and a second surface 3102, the first surface 3101 and the second surface 3102 are arranged in parallel, the second surface 3102 faces the connection area 411 of the lamp board 410, and the first surface 3101 faces away from the connection area 411 of the lamp board 410. The first bending portion 4111 has circuit traces on the side facing the power circuit board 310. The component-free area means that no electronic components 320 and soldering points 330 are provided at the corresponding positions of the circuit traces in the diameter direction (such as Figure 3 the a direction in Figure 3 , that is, the direction perpendicular to the circuit board), and the power circuit board 310 and the first bending portion 4111 are kept at a distance of 0.5 mm or more. In another embodiment of the present application, no electronic components 320 and soldering points 330 are provided in the area where the second surface 3102 of the power circuit board 310 overlaps with the connection area 411 in the diameter direction (such as Figure 3 the a direction in Figure 3 ), and the power circuit board and the first bending portion 4111 are kept at a distance of 0.5 mm or more. These designs ensure that there is sufficient electrical distance between the first bending portion 4111 and the electronic components 320, and avoid the occurrence of arcing or sparking between the first bending portion 4111 and the electronic components 320. As a preferred method, no electronic components 320 are provided on the power circuit board 310 in the folding area 60, which further increases the electrical distance between the first bending portion 4111 and the electronic components 320, and avoids the occurrence of arcing or sparking between the first bending portion 4111 and the electronic components 320.

[0038] In another embodiment of the present application, the power supply circuit board 310 includes a first surface 3101 and a second surface 3102. The first surface 3101 and the second surface 3102 are arranged in parallel. The second surface 3102 faces the connection area 411 of the lamp board 410, and the first surface 3101 faces away from the connection area 411 of the lamp board 410. The second surface 3102 includes a first area 31021 and a second area 31022. The second area 31022 overlaps with the connection area 411 of the lamp board 410 in the radial direction (diameter direction) of the lamp body 10, and the first area 31021 does not overlap with the connection area 411 of the lamp board 410 in the radial direction of the lamp body 10. In this embodiment, the electronic components 320 and the welding points 330 are only arranged on the first surface 3101 of the power supply circuit board 310 and the first area 31021 of the second surface 3102, and no electronic components 320 and welding points 330 are arranged in the second area 31022 of the second surface 3102. Moreover, the power supply circuit board maintains a distance of 0.5 mm or more from the first bending portion 4111. Since the second area 31022 of the second surface 3102 is closest to the first bending portion 4111, the occurrence of arcing or sparking between the first bending portion 4111 and the electronic components 320 and the welding points 330 can be effectively avoided without arranging any electronic components 320 and welding points 330.

[0039] In addition, the light source 420 may not be arranged in the area of the lamp board 410 below the second bending portion 4112, that is, the light source 420 is not arranged in the area where the lamp board 410 overlaps with the power supply circuit board 310 in the radial direction of the lamp body 10. Or it is defined that only the connection area 411 of the lamp board 410 overlaps with the power supply circuit board 310, the light-emitting area 412 of the lamp board 410 does not overlap with the power supply circuit board 310, and the light source 420 is only arranged in the light-emitting area 412 of the lamp board 410. In this way, a sufficient electrical distance is ensured between the second bending portion 4112 and the light source 420, and the occurrence of arcing or sparking between the second bending portion 4112 and the light source 420 is avoided. As a preferred method, the light source 420 is not arranged on the lamp board 410 in the folding area 60, which further increases the electrical distance between the second bending portion 4112 and the light source 420 and avoids the occurrence of arcing or sparking between the second bending portion 4112 and the light source 420.

[0040] Reference Figure 5, in another embodiment of the present application, an isolator 4113 is provided at a position or area where arcing is likely to occur, that is, the isolator is provided between the power supply circuit board 310 and the connection area 411 of the lamp board 410. The isolator 4113 is made of an insulating material. On the one hand, the isolator 4113 has a certain thickness to increase the electrical distance. On the other hand, by improving the insulation grade of the isolator 4113, the phenomena of arcing and flashover are avoided. The isolator 4113 can be a high-temperature tape, white glue, insulating cover film, insulating glue or insulating sleeve, etc. In one embodiment, the isolator 4113 can be provided on the power supply circuit board 310 above the first bending portion 4111, at least an isolator 4113 is provided on the surface of the power supply circuit board 310 facing the first bending portion 4111. For example Figure 6 As shown, at least an isolator 4113 is provided in the second area 31022 of the second surface 3102 of the power supply circuit board 310, and the isolator 4113 is, for example, a high-temperature tape. The high-temperature tape is preferably provided at a flat position, which is beneficial to its stable and firm isolation effect. In another embodiment, the isolator 4113 can also be provided on the surface of the first bending portion 4111 facing the power supply circuit board 310, and the isolator 4113 is, for example, white glue. The isolator 4113 provided at the above two positions or areas can effectively increase the electrical distance between the first bending portion 4111 and the power supply circuit board 310, and avoid the phenomena of arcing and flashover between the first bending portion 4111 and the power supply circuit board 310.

[0041] The isolator can also be provided between the second bending portion 4112 and the lamp board 410 below it. In another embodiment of the present application, the isolator 4113 can also be provided on the lamp board 410 below the second bending portion 4112, as Figure 6 shown, at least an isolator 4113 is provided on the surface of the lamp board 410 facing the second bending portion 4112, and the isolator 4113 is, for example, a high-temperature tape; the isolator 4113 can also be provided on the surface of the second bending portion 4112 facing the lamp board below it, and the isolator 4113 is, for example, white glue. The isolator 4113 provided at the above two positions or areas can effectively increase the electrical distance between the second bending portion 4112 and the lamp board 410 below the second bending portion 4112, and avoid the phenomena of arcing and flashover between the second bending portion 4112 and the lamp board 410 below the second bending portion 4112.

[0042] In some embodiments, if the isolator 4113 is a cover film, it can be attached to the connection area 411 of the lamp board 410 (not shown in the figure) to effectively avoid the phenomena of arcing and flashover between the first bending portion 4111 and the second bending portion 4112 and the power supply circuit board 310 and the lamp board 410 below the second bending portion 4112, and the cover film can also be applied to the entire lamp board 410.

[0043] In addition, in another embodiment of the present application, with reference to Figure 7 , by changing the shape of the connection area 411 in the lamp body 10, the positions of the first bending part 4111 and the second bending part 4112 are changed, so that the first bending part 4111 is far away from the power supply circuit board 310, thereby increasing the electrical distance between the first bending part 4111 and the light source module 40, and avoiding the occurrence of arcing or flashover between the first bending part 4111 and the power supply circuit board 310; the second bending part 4112 is far away from the lamp board 410 located below the second bending part 4112, so as to increase the electrical distance between the second bending part 4112 and the lamp board 410 located below the second bending part 4112, and avoid the occurrence of arcing or flashover between the second bending part 4112 and the lamp board 410 located below the second bending part 4112. As a preferred method, the connection area 411 is in a "Z" shape in the lamp body 10, which can maximize the distance between the first bending part 4111 and the power supply circuit board 310 and the distance between the second bending part 4112 and the lamp board 410 located below the second bending part 4112.

[0044] More specifically, the fixing points of the lamp board 410 and the lamp body 10 can be moved towards the first end 110 and the second end 120 of the lamp body 10 respectively, so that the connection area 411 is in a "Z" shape in the lamp body 10. It is also possible to reduce the length of the folding area 60 of the lamp board 410, so that the folding area 60 is in a "Z" shape in the lamp body 10. As an example, the original unfolded length of the folding area 60 is 35 - 40 mm. In order to present the "Z" shape effect, the unfolded length of the folding area 60 is reduced to 25 - 35 mm, preferably 30 mm, so that the length of the folding area 60 along the length direction of the lamp body 10 remains unchanged. If the reduced length is too long, the folding area 60 still presents an "S" shape, and the electrical distance cannot be effectively increased, thus the occurrence of arcing and flashover cannot be avoided; if the reduced length is too short, the folding area 60 is stretched too tightly, and during the process of pulling or shaking, the first bending part 4111 and the second bending part 4112 are prone to breakage, reducing the service life of the LED lamp. Therefore, by converting the original "S" shape of the folding area 60 into a "Z" shape, a safe electrical distance is provided between the first bending part 4111 and the power supply circuit board 310, and a safe electrical distance is provided between the second bending part 4112 and the lamp board 410 located below the second bending part 4112. At the same time, it can also prevent the folding area 60 from deforming in the lamp body 10 and causing the electrical distance to become smaller.

[0045] In summary, the present application increases the electrical distance between the first bending portion 4111 and the power module 30 and increases the electrical distance between the second bending portion 4112 and the lamp board 410 located below the second bending portion 4112 by at least one of the following methods: setting a prohibited fabric area in the folding area 60, setting a spacer 4113 in the folding area 60, and changing the shape of the folding area 60 in the lamp body 10, thereby avoiding the occurrence of arcing or sparking between the first bending portion 4111 and the power circuit board 310 and between the second bending portion 4112 and the lamp board 410 located below the second bending portion 4112, making the LED lamp operate more safely and avoiding safety accidents.

[0046] It should be particularly noted that the above features of the present application can be arbitrarily combined and used for the improvement of LED lamps, and the above embodiments are only described by way of example. The present application is not limited thereto, and many variations are possible without departing from the spirit of the present application and the scope defined by the appended claims.

Claims

1. An LED straight tube lamp, characterized in that: include: a lamp body having a first end and a second end opposite to each other; Two lamp caps, the first end and the second end of the lamp body being respectively provided with the lamp caps; A power module, including a power circuit board, wherein the power module is arranged in a housing space formed by the lamp body and the lamp holder; A light source module, wherein the light source module is located in the lamp body, the light source module includes a lamp board and a light source, the lamp board has a connection area and a light-emitting area, the light source is arranged in the light-emitting area of ​​the lamp board, the connection area is connected to the power module and forms a folding area, the folding area overlaps with the power circuit board in the radial direction of the lamp body, and an insulator is respectively arranged between the folding area and the power circuit board or between the folding area and the lamp board therebelow.

2. The LED straight tube lamp according to claim 1, characterized in that: The folding area located in the connection area has a first bending portion and a second bending portion, an insulator is arranged on the surface of the power circuit board facing the first bending portion, and an insulator is arranged on the surface of the light board facing the second bending portion.

3. The LED straight tube lamp as claimed in claim 2, characterized in that: The insulator is a high temperature tape.

4. The LED straight tube lamp according to claim 1, characterized in that: The folding area located in the connection area has a first bending portion and a second bending portion, a spacer is arranged on a surface of the first bending portion close to the power circuit board, and a spacer is arranged on a surface of the second bending portion close to the light board.

5. The LED straight tube lamp as claimed in claim 4, characterized in that: The spacer is white glue.

6. The LED linear lamp according to claim 1, characterized in that, The spacer is attached to the connection area of ​​the light board.

7. The LED straight tube lamp as claimed in claim 6, characterized in that: The spacer is a covering film.

8. The LED straight tube lamp according to claim 1, characterized in that, The folding area is in a "Z" shape.

9. The LED straight tube lamp according to claim 8, characterized in that: The unfolded length of the folded area is 25-35 mm.

10. The LED straight tube lamp according to claim 9, characterized in that: The unfolded length of the folding area is 30 mm.

11. The LED straight tube lamp according to any one of claims 1 to 10, characterized in that: The power circuit board includes a first surface and a second surface, the first surface and the second surface are arranged in parallel, the part where the folding area and the second surface overlap in the radial direction of the lamp body has no electronic components and welding points, and the light source is arranged in the light-emitting area, and the light-emitting area does not overlap with the power circuit board.

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