LED straight lamp

Abstract

The utility model discloses an LED lamp which comprises a lamp body, two lamp caps, two power modules and a light source module. The lamp caps are arranged at the two ends of the lamp body, the power module comprises a power circuit board and an electronic component, and the power module is at least located in one of two containing spaces formed by the lamp body and the lamp caps. The light source module is located in the lamp body and comprises a lamp panel and a light source, the light source is arranged on the lamp panel, the lamp panel is provided with a connecting area and a light-emitting area, the connecting area is connected with the power circuit board and forms a folding area, and the connecting area located in the folding area is provided with a first bending part and a second bending part. Through at least one method of arranging a piece arrangement prohibiting area on a power supply circuit board, arranging an isolation object in a folding area and changing the shape of the folding area in a lamp body, the electrical distance between a first bending part and a power supply module and the electrical distance between a second bending part and a lamp panel located below the second bending part are increased; the phenomenon of sparking or arc discharge when the LED lamp works is avoided, and the safety of the LED lamp is improved.

Description

[0001] The utility model application is submitted to China Patent Bureau on November 14, 2023, application number

[0002] It is the divisional application of "202390000114.9", and the name is "a LED straight pipe lamp". TECHNICAL FIELD

[0003] The present application relates to the technical field of LED lighting device, especially to a LED straight pipe lamp. BACKGROUND

[0004] The LED lamp has many advantages such as long service life, small size, energy saving and so on, so it is widely used in the market and gradually replaces the existing incandescent lamp and fluorescent lamp.

[0005] In the LED straight pipe lamp product, the flexible circuit board is used as part or whole of the lamp strip board, and there is often a folding area at both ends of the LED straight pipe lamp, which is similar to "S" shape, so that the electrical spacing of this area will be smaller. The electrical spacing includes the spacing formed by the flexible circuit board in the folding area, the spacing between the flexible circuit board and the power circuit board. In general, occasional sparking phenomenon may occur in the general driving scheme, and if the boost driving scheme (boost) is used, the sparking phenomenon is more likely to occur. At this time, the output voltage of the LED end will be higher than the input voltage from the outside of the LED straight pipe lamp, so there is a risk of sparking and arcing on the flexible circuit board and safety hazards.

[0006] In view of the deficiencies and shortcomings of the prior art LED straight pipe lamp, how to design the LED lamp to reduce the occurrence of sparking and arcing in use and improve safety is a technical problem that needs to be solved by the technical personnel in the field. SUMMARY

[0007] In view of the shortcomings of the above-mentioned related art, the purpose of the present application is to provide a LED straight pipe lamp to avoid the phenomenon of sparking or arcing of the LED lamp during use.

[0008] To achieve the above object and other related objects, the first aspect of the present application discloses a LED straight tube lamp, characterized in that comprising: a lamp body, the lamp body having opposite first and second ends; two lamp holders, the first and second ends of the lamp body are respectively provided with the lamp holders; a power module, comprising 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 accommodating space formed by the lamp body and the lamp holder, the circuit board has a first surface and a second surface, the first surface and the second surface are arranged in parallel, the electronic components are arranged at least on the first surface, and the second surface comprises a first area and a second area; a light source module, the light source module is located in the lamp body, the light source module comprises a lamp panel and a light source, the light source is arranged on the lamp panel, the lamp panel has a connecting area and a light-emitting area, the connecting area is connected with 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 the second area is not provided with any electronic components and welding points.

[0009] In some embodiments of 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.

[0010] In some embodiments of the first aspect of the present application, the light source is arranged in the light-emitting area of the lamp panel, the folding area overlaps with the circuit board in the radial direction of the lamp body, and a spacer is arranged between the folding area and the circuit board or between the folding area and the lamp panel below the folding area.

[0011] In some embodiments of the first aspect of the present application, the folding area in the connecting area has a first bending part and a second bending part, a spacer is arranged on the surface of the circuit board facing the first bending part, and a spacer is arranged on the surface of the lamp panel facing the second bending part.

[0012] In some embodiments of the first aspect of the present application, the spacer is a high-temperature adhesive tape.

[0013] In some embodiments of the first aspect of the present application, the folding area in the connecting area has a first bending part and a second bending part, a spacer is arranged on the surface of the circuit board facing the first bending part, and a spacer is arranged on the surface of the lamp panel facing the second bending part.

[0014] In some embodiments of the first aspect of the present application, the spacer is white glue.

[0015] In some embodiments of the first aspect of the present application, the spacer is attached to the connecting area of the lamp panel.

[0016] In some embodiments of the first aspect disclosed in the application, the isolator is a covering film.

[0017] In some embodiments of the first aspect disclosed in the application, the folding area is in the shape of a "Z".

[0018] In some embodiments of the first aspect disclosed in the application, the unfolding length of the folding area is 25-35mm.

[0019] In some embodiments of the first aspect disclosed in the application, the unfolding length of the folding area is 30mm.

[0020] In some embodiments of the first aspect disclosed in the application, an isolator is arranged between the folding area and the circuit board, and an isolator is arranged between the folding area and the lamp plate below the folding area.

[0021] Compared with the prior art, the application has at least the following beneficial effects:

[0022] By at least one of the following methods: arranging a forbidden layout area on the circuit board, arranging an isolator in the folding area, and changing the shape of the folding area in the lamp body, the electrical distance between the first bending part and the power module is increased, and the electrical distance between the second bending part and the lamp plate below the second bending part is increased, thereby avoiding the phenomenon of sparking or arcing when the LED lamp is working, and improving the safety of the LED lamp. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of an LED lamp of an embodiment of the application.

[0024] Figure 2 is a sectional view of an LED lamp of an embodiment of the application.

[0025] Figure 3 is Figure 2 is an enlarged view of A of

[0026] Figure 4 is an exploded schematic diagram of an LED lamp of an embodiment of the application.

[0027] Figure 5 is an enlarged view of A of another embodiment of the application Figure 2 .

[0028] Figure 6 is an enlarged view of A of another embodiment of the application Figure 2 .

[0029] Figure 7 is an enlarged view of A of another embodiment of the application Figure 2 .

[0030] In the figure: 10, lamp body; 110, first end; 120, second end; 20, lamp cap; 30, power module; 310, power circuit board; 320, electronic components; 40, light source module; 410, lamp plate; 411, connecting area; 4111, first bending part; 4112, second bending part; 4113, separator; 412, light emitting area; 420, light source; 50, conductive needle; 60, folding area. DETAILED DESCRIPTION

[0031] For the convenience of understanding the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized 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. In the following, the directions such as "first", "second", "third", "axial direction", "upper", "lower", etc. are used to more clearly indicate the positional relationship of the structure, and are not a limitation on the present application. In the present application, the "vertical", "horizontal", "parallel" are defined as: including the case of ± 30% on the basis of the standard definition. For example, vertical usually means that the included angle with the reference line is 90 degrees, but in the present application, vertical means including the case of 60 degrees to 120 degrees.

[0032] Reference Figures 1 to 3 , is one of the embodiments of the present application. The LED lamp comprises: a lamp body 10, two lamp caps 20, a power module 30 and a light source module 40, the two lamp caps 20 are respectively arranged at the two ends of the lamp body 10, the power module 30 is located in the accommodation space formed by the lamp cap 20 and is electrically connected with the light source module 40, and the light source module 40 is located in the lamp body 10. The number of the power module 30 is one or two, and when the number of the power module 30 is two, the power module 30 is respectively located in the accommodation space of the two lamp caps 20 and forms electrical connection with the two ends of the light source module 40.

[0033] 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, avoid the light source module 40 from being damaged and contaminated by foreign matters, prolong the service life of the light source module 40, on the other hand, adjust the light emitted by the light source module 40, diffuse the light emitted by the light source module 40, make the light more soft, avoid the direct and glaring LED light, and also have a decorative effect, etc. The lamp body 10 can be cylindrical, cuboid or U-shaped, etc. In the present embodiment, the lamp body 10 is slender cylindrical. The material of the lamp body 10 can be plastic material, glass material or PC material lamp, in the present embodiment, the lamp body 10 adopts glass material with reinforcing part, to avoid the traditional glass lamp tube easy to break and the electric shock accident caused by breakage and electric leakage, and the problem that the plastic lamp tube is easy to deform due to heat.

[0034] 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 connection mode of the lamp holder 20 and the lamp body 10 can be through an adhesive or a buckle connection and the like. The first end 110 of the lamp body 10 is provided with one lamp holder 20, and the second end 120 of the lamp body 10 is provided with another lamp holder 20. The lamp holder 20 is further provided with a conductive pin 50, and the conductive pin 50 is arranged at the end of the lamp holder 20. Two conductive pins 50 are arranged on each lamp holder 20, and the conductive pin 50 is used for electrical connection with an external power supply. The conductive pin 50 can be a solid conductive pin 50 or a hollow conductive pin 50. Although the conductive pin is described in the embodiment, as long as the structure design has the function of electrical connection with the outside, it belongs to the concept of the application, and other implementation forms are not listed here. In other embodiments of the application, the end of the lamp holder 20 is further provided with a gas permeable hole (not shown), and the gas permeable hole is used for gas flow. The gas can be air, which can flow from the inside of the LED lamp to the outside of the LED lamp through the hollow hole, or from the outside of the LED lamp to the inside of the LED lamp through the hollow hole. The flowing gas can take away the heat in the LED lamp, effectively reduce the temperature of the LED lamp, and can improve the service life of the LED lamp. The lamp holder 20 can be a metal material, a plastic material or a composite material of metal and plastic.

[0035] The power supply module 30 is used for converting an external power supply (mains) into a specific voltage and current to drive the light source module 40 to emit light. The power supply module 30 is located in at least one of the two accommodating spaces formed by the lamp holder 20 and the lamp body 10. Since the connection of the lamp holder 20 and the lamp body 10 can have an overlapping area, the specific position of the power supply module 30 can be at least partially accommodated in the end region of the lamp body 10. In order to make the skilled person easy to understand, the following description is uniformly described as the power supply module 30 being arranged in the accommodating space of the lamp holder, but other possible cases are not excluded, which are particularly described here. When the number of the power supply module 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 the power supply module 30 is one, the lamp body 10 has the power supply module 30 at any end. The power supply module 30 can be connected with the two lamp holders 20 respectively through clamping, bonding or other ways. In other embodiments of the application, the power supply module 30 can also be directly placed in the accommodating space of the lamp holder 20, and only the electrical connection with the conductive pin 30 and the light source module 40 is needed. The conductive pin 50 penetrates the end of the lamp holder 20 and is electrically connected with the power supply module 30. The power supply module 30 includes a power supply circuit board 310 and electronic components 320, and 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 connected with the external power supply through the conductive pin 50 and supplies power for the light source module 40.

[0036] Please also refer to Figure 4The light source module 40 is located in the lamp body 10. In an embodiment, the light source module 40 includes a lamp plate 410 and light sources 420. The light sources 420 are arranged on the lamp plate 410. The light sources 420 can be LED lamp beads. When powered, the light sources 420 can emit light. Either end of the lamp plate 410 has a connecting area 411 and a light-emitting area 412 connected to the connecting area 411. The light-emitting area 412 can be an area where the light sources 420 are arranged. The connecting area 411 can be an area where the light sources 420 are not arranged. In other embodiments, when the number of power modules 30 is two, the lamp plate 410 has two connecting areas 411, which are connected to two power modules 30, respectively. The light-emitting area 412 is arranged between the two connecting areas 411. Before the connecting area 411 is connected to the power circuit board 310, the end of the connecting area 411 is exposed from the first end 110 or the second end 120 of the lamp body 10. The end of the connecting area 411 exposed from the lamp body 10 is connected to the power circuit board 310. The connection mode includes welding or electrically connecting through other conductive materials. Then, the connecting area 411 is installed into the lamp holder 20 or the lamp body 10 together with the power circuit board 310 and forms a folding area 60. When the number of power modules 30 is two, there is one folding area 60 at the first end 110 and the second end 120 of the lamp body 10, respectively. Please refer to Figure 3 As shown in FIG. 9, the connecting area 411 located in the folding area 60 has a first bending part 4111 and a second bending part 4112. In the unfolded (not bent) state of the lamp plate 410, the distance between the area where the first bending part 4111 is located and the power circuit board 310 is greater than the distance between the area where the second bending part 4112 is located and the power circuit board 310. In other words, the area where the second bending part 4112 is located is closer to the power circuit board 310 than the area where the first bending part 4111 is located. After the folding area 60 is formed, the first bending part 4111 is close to the end 110 / 120 of the lamp body 10, and the second bending part 4112 is away from the end 110 / 120 of the lamp body 10.

[0037] The light source 420 is not arranged on the connecting area 411 of the folding area 60, and the light source 420 is arranged on the light-emitting area 412. When powered on, the light-emitting area 412 can emit light. The light-emitting area 412 can be fixed on the inner circumferential surface of the lamp body 10 by an adhesive. The connecting area 411 is mainly made of a flexible material, and the light-emitting area 412 can be made of a flexible material or a rigid material, and is preferably made of a flexible material. The connecting area 411 and the light-emitting area 412 are provided with conductive bodies. The conductive bodies can be embedded in the insulating material of the plate body or formed on the surface of the plate body. The conductive bodies can be copper wires formed by printing or plating. The conductive bodies are electrically connected to the power circuit board 310 and the light source 420, respectively. When the two connecting areas 411 and the light-emitting area 412 are made of flexible materials, the two connecting areas 411 and the light-emitting area 412 can be integrally formed. The connecting 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 saves cost. On the other hand, it can make the performance of the lamp plate 410 more stable. In another embodiment of the present application, the connecting area 411 and the light-emitting area 412 of the lamp plate 410 are independent elements made of different materials. For example, the light-emitting area 412 is a rigid substrate (FR4, aluminum substrate, etc.), and the connecting area 411 is a flexible circuit board (FPC). The two are electrically connected by welding or other connection methods.

[0038] With reference to Figure 3 The distance between the first bending part 4111 of the connecting area 411 and the power circuit board 310 is very close, resulting in a small electrical distance between the first bending part 4111 of the connecting area 411 and the power circuit board 310. When powered on, the first bending part 4111 and the power circuit board 310 are prone to sparking or arcing. In addition, the distance between the second bending part 4112 of the connecting area 411 and the lamp plate 410 below the second bending part 4112 is also very close, resulting in a small electrical distance between the second bending part 4112 of the connecting area 411 and the lamp plate 410 below the second bending part 4112. When powered on, the second bending part 4112 and the lamp plate 410 below the second bending part 4112 are prone to sparking or arcing. The electrical distance refers to the air gap distance between the live parts or between the live parts and the grounded parts during live work, which has a small probability of discharge. In particular, when the power module 30 adopts a boost scheme, the LED lamp is more prone to sparking or arcing. At this time, a larger electrical distance is needed to effectively avoid sparking and arcing.

[0039] Specifically, a prohibited component placement area is provided on the power circuit board 310 in the folded area 60. In one embodiment provided in this application, the power circuit board 310 includes a first surface 3101 and a second surface 3102, which are arranged parallel to each other. The second surface 3102 faces the connection area 411 of the lamp board 410, while the first surface 3101 faces away from the connection area 411 of the lamp board 410. The first bent portion 4111 has circuit traces on the side facing the power circuit board 310. The prohibited component placement area refers to the circuit traces in the diametrical direction of the second surface 3102 (e.g., ...). Figure 3 In the direction a (i.e., perpendicular to the circuit board), no electronic components 320 and solder joints 330 are disposed at the corresponding positions, and the power circuit board 310 maintains a distance of 0.5 mm or more from the first bent portion 4111. In another embodiment of this application, the second surface 3102 of the power circuit board 310 is in the diametrical direction (e.g., ...). Figure 3 In the area overlapping the connection area 411 (direction a), no electronic components 320 or solder joints 330 are provided, and the power circuit board maintains a distance of 0.5 mm or more from the first bend 4111. These designs ensure sufficient electrical distance between the first bend 4111 and the electronic components 320, preventing arcing or sparking between them. Preferably, no electronic components 320 are provided on the power circuit board 310 located in the folding area 60, further increasing the electrical distance between the first bend 4111 and the electronic components 320, thus preventing arcing or sparking between them.

[0040] In another embodiment of the present application, the power circuit board 310 comprises 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 connecting area 411 of the lamp plate 410, and the first surface 3101 faces away from the connecting area 411 of the lamp plate 410. The second surface 3102 comprises a first area 31021 and a second area 31022, the second area 31022 overlaps the connecting area 411 of the lamp plate 410 in the radial direction of the lamp body 10, and the first area 31021 does not overlap the connecting area 411 of the lamp plate 410 in the radial direction of the lamp body 10. In this embodiment, the electronic components 320 and the soldering points 330 are arranged only on the first surface 3101 of the power circuit board 310 and the first area 31021 of the second surface 3102, and the second area 31022 of the second surface 3102 is not arranged with any electronic components 320 and soldering points 330. The power circuit board and the first bending portion 4111 maintain a distance of 0.5 mm or more. Since the second area 31022 of the second surface 3102 is closest to the first bending portion 4111, arranging no electronic components 320 and soldering points 330 can effectively avoid the occurrence of sparking or arcing between the first bending portion 4111 and the electronic components 320 and soldering points 330.

[0041] In addition, the light source 420 can also not be arranged in the area of the lamp plate 410 below the second bending portion 4112, i.e., the area of the lamp plate 410 overlapping the power circuit board 310 in the radial direction of the lamp body 10 is not arranged with the light source 420. Or, the connecting area 411 of the lamp plate 410 overlaps the power circuit board 310, and the light-emitting area 412 of the lamp plate 410 does not overlap the power circuit board 310, and the light source 420 is arranged only in the light-emitting area 412 of the lamp plate 410. In this way, the second bending portion 4112 and the light source 420 have sufficient electrical distance, and the occurrence of sparking or arcing between the second bending portion 4112 and the light source 420 is avoided. As a preferred mode, the light source 420 is not arranged on the lamp plate 410 in the folding area 60, further increasing the electrical distance between the second bending portion 4112 and the light source 420, and avoiding the occurrence of sparking or arcing between the second bending portion 4112 and the light source 420.

[0042] Reference Figure 5In another embodiment of this application, an insulating material 4113 is provided in a location or area prone to arcing, specifically between the power circuit board 310 and the connection area 411 of the lamp board 410. The insulating material 4113 is made of insulating material. On one hand, the insulating material 4113 has a certain thickness to increase the electrical distance; on the other hand, by improving the insulation level of the insulating material 4113, arcing and arcing phenomena are avoided. The insulating material 4113 can be high-temperature tape, white glue, insulating covering film, insulating glue, or insulating sleeve, etc. In one embodiment, the insulating material 4113 can be provided on the power circuit board 310 located above the first bend 4111, at least on the side of the power circuit board 310 facing the first bend 4111. For example... Figure 6 As shown, an isolator 4113 is provided at least on the second region 31022 of the second surface 3102 of the power circuit board 310. The isolator 4113 is, for example, high-temperature tape. The high-temperature tape is preferably positioned in a straight line to facilitate its stable and secure isolating function. In another embodiment, the isolator 4113 can also be provided on the side of the first bend 4111 facing the power circuit board 310. The isolator 4113 is, for example, white adhesive. Providing the isolator 4113 in either of these locations or regions can effectively increase the electrical distance between the first bend 4111 and the power circuit board 310, preventing arcing and flickering between them.

[0043] The spacer can also be disposed between the second bend 4112 and the lamp panel 410 below it. In another embodiment of this application, the spacer 4113 can also be disposed on the lamp panel 410 located below the second bend 4112, such as... Figure 6 As shown, at least one insulating material 4113 is provided on the side of the lamp panel 410 facing the second bend 4112. The insulating material 4113 is, for example, high-temperature tape. The insulating material 4113 can also be provided on the side of the second bend 4112 facing the lamp panel below it. The insulating material 4113 is, for example, white glue. Providing the insulating material 4113 in either of the above two positions or areas can effectively increase the electrical distance between the second bend 4112 and the lamp panel 410 located below the second bend 4112, thus avoiding arcing and flashing phenomena between the second bend 4112 and the lamp panel 410 located below the second bend 4112.

[0044] In some embodiments, if the separator 4113 is a cover film, it can be attached to the connection area 411 of the lamp panel 410 (not shown in the figure) to effectively prevent arcing and arcing between the first bend 4111 and the second bend 4112 and the power circuit board 310 and the lamp panel 410 located below the second bend 4112. The cover film can also be applied to the entire lamp panel 410.

[0045] Furthermore, in another embodiment of this application, reference is made to... Figure 7 By changing the shape of the connection area 411 in the lamp body 10, the positions of the first bent portion 4111 and the second bent portion 4112 are changed, so that the first bent portion 4111 is moved away from the power circuit board 310, thereby increasing the electrical distance between the first bent portion 4111 and the light source module 40 and avoiding arcing or sparking between the first bent portion 4111 and the power circuit board 310; and the second bent portion 4112 is moved away from the lamp board 410 located below the second bent portion 4112, thereby increasing the electrical distance between the second bent portion 4112 and the lamp board 410 located below the second bent portion 4112 and avoiding arcing or sparking between the second bent portion 4112 and the lamp board 410 located below the second bent portion 4112. As a preferred embodiment, the connection area 411 is arranged in a "Z" shape within the lamp body 10, which maximizes the distance between the first bend 4111 and the power circuit board 310 and the lamp plate 410 located below the second bend 4112.

[0046] More specifically, the fixing points of the lamp panel 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 connecting area 411 forms a "Z" shape within the lamp body 10. Alternatively, the length of the folding area 60 of the lamp panel 410 can be reduced to make the folding area 60 form a "Z" shape within the lamp body 10. For example, the original unfolded length of the folding area 60 is 35-40mm. In order to present a "Z" shape effect, the unfolded length of the folding area 60 is reduced to 25-35mm, preferably 30mm. This keeps the length of the folding area 60 along the length direction of the lamp body 10 unchanged. If the reduced length is too long, the folding area 60 will still have an "S" shape, failing to effectively increase the electrical distance and thus unable to prevent arcing and flickering. If the reduced length is too short, the folding area 60 will be stretched too tightly, and the first bend 4111 and the second bend 4112 are prone to breakage during pulling or shaking, reducing the lifespan of the LED light. Therefore, by converting the original "S" shape of the folding area 60 into a "Z" shape, a safe electrical distance is achieved between the first bend 4111 and the power circuit board 310, and between the second bend 4112 and the lamp board 410 located below the second bend 4112. This also prevents the folding area 60 from deforming within the lamp body 10, which would reduce the electrical distance.

[0047] In summary, the present application increases the electrical distance between the first bending part 4111 and the power module 30 and the electrical distance between the second bending part 4112 and the lamp plate 410 below the second bending part 4112 by at least one of the following methods: setting a forbidden cloth area in the folding area 60, setting a separator 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 sparking or arcing between the first bending part 4111 and the power circuit board 310 and between the second bending part 4112 and the lamp plate 410 below the second bending part 4112, making the LED lamp more secure during operation and avoiding the occurrence of safety accidents.

[0048] It should be particularly noted that the above features of the present application can be arbitrarily arranged and combined for the improvement of LED lamps, and the above embodiments are described by way of example only. 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, The application relates to a lamp body, two lamp heads, a power module and a light source module. The lamp body has opposite first and second ends, and the first and second ends are respectively provided with the lamp heads. The power module comprises a power circuit board, electronic components and welding points, the electronic components and the welding points are arranged on the power circuit board, the power module is arranged in a containing space formed by the lamp body and the lamp heads, the power circuit board has a first surface and a second surface, the first surface and the second surface are arranged in parallel, the electronic components are arranged at least on the first surface, and the second surface comprises a first area and a second area. The light source module is arranged in the lamp body, the light source module comprises a lamp plate and a light source, the light source is arranged on the lamp plate, the lamp plate has a connecting area and a light-emitting area, the connecting area is connected with the power module and forms a folding area, the folding area is located between the power circuit board and the light-emitting area, the second surface of the power circuit board faces the folding area, the folding area overlaps the second area in the radial direction of the lamp body, and the electronic components and the welding points are arranged only on the first surface of the power circuit board and the first area of the second surface. The light source is arranged in the light-emitting area, and the light-emitting area does not overlap the power circuit board in the radial direction of the lamp body.

2. The LED straight tube lamp of claim 1, wherein, The light source is arranged in the light-emitting area of the lamp plate, the folding area overlaps the power circuit board in the radial direction of the lamp body, and the folding area is provided with a spacer from the power circuit board or from the lamp plate below the folding area.

3. The LED straight tube lamp of claim 1, wherein, The folding area in the connecting area has a first bending part and a second bending part, the power circuit board is provided with a spacer on a surface facing the first bending part, and the lamp plate is provided with a spacer on a surface facing the second bending part.

4. The LED straight tube lamp of claim 3, wherein, The spacer is a high-temperature adhesive tape.

5. The LED straight tube lamp of claim 4, wherein, The folding area in the connecting area has a first bending part and a second bending part, a spacer is arranged on a surface of the first bending part close to the power circuit board, and a spacer is arranged on a surface of the second bending part close to the lamp plate.

6. The LED straight tube lamp of claim 3, wherein, The spacer is white glue.

7. The LED straight tube lamp of claim 6, wherein, The spacer is attached to the connecting area of the lamp plate.

8. The LED straight tube lamp of claim 3, wherein, The spacer is a covering film.

9. The LED straight tube lamp of claim 8, wherein, The folding area is in the shape of a "Z" letter.

10. The LED straight tube lamp of claim 1, wherein, The unfolding length of the folding area is 25-35 mm.

11. The LED straight tube lamp of claim 10, wherein, The unfolding length of the folding area is 30 mm.

12. The LED straight tube lamp of claim 11, wherein, A spacer is arranged between the folding area and the power circuit board, and a spacer is arranged between the folding area and the lamp plate below the folding area.

13. The LED straight tube lamp of claim 12, wherein, ​

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