Waterproof structure of underground lamp

Abstract

The underground lamp waterproof structure comprises a cylindrical shell, an annular end cover, a lampshade and an LED lamp bead set, the annular end cover is installed at the end opening of the cylindrical shell, a spherical piece is arranged in the center of the bottom end face of the lampshade and clamped to a bearing platform installed in the center of the cylindrical shell, and the LED lamp bead set is installed in the lampshade. A light-transmitting plate I and a light-transmitting plate II are hermetically mounted in the center of the annular end cover and an opening in the upper end of the lampshade respectively. A plurality of inclination adjusting pieces are evenly distributed on the outer wall of the lampshade, each inclination adjusting piece comprises a connecting rod and an adjusting bolt, the front end of each connecting rod is hinged to the outer wall of the lampshade, the adjusting bolts are installed in threaded adjusting holes in the annular end cover, and the front ends of the adjusting bolts are hinged to the rear ends of the connecting rods. According to the waterproof structure of the underground lamp, the structure is compact, universal adjustment of the irradiation angle of the LED lamp bead set can be achieved without disassembly, operation is convenient, the waterproof effect is good through double sealing, the waterproof structure cannot be exposed outside, mistaken touch is not likely to be caused, and safety and reliability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of lamps, and in particular to a waterproof structure for an underground lamp. Background Art

[0002] Underground lamps are widely used in the field of scientific and technological lighting in my country. They can be used in squares, restaurants, private villas, gardens, conference rooms, exhibition halls, community landscaping, stage bars, shopping malls, parking lots and other places. Because they are buried in the ground for lighting, they are called underground lamps. Underground lamps can have a good decorative effect on the environment, and at the same time they will not occupy space in the venue and will not affect normal traffic, so they are very popular. However, underground lamps are generally buried in the ground, and their waterproofing is particularly important. Poor waterproofing can easily cause short circuits in the circuit.

[0003] At present, some places need to frequently adjust the illumination angle of underground lights. For example, when using underground lights to decorate landscape trees, it is necessary to change the direction of the underground lights on the landscape trees according to different environments or requirements. At this time, the underground lights need to be adjusted. Traditional underground lights need to be disassembled and reassembled when adjusting the angle, which is inconvenient to operate. Some exposed adjustment devices are not only easy to be accidentally touched by tourists, resulting in changes in the illumination direction, but also have poor overall sealing and waterproofing effects, which can easily cause parts to rust and circuit short circuits to damage. Summary of the invention

[0004] The purpose of the present invention is to provide a waterproof structure for underground lamps to solve the above defects.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A waterproof structure for an underground lamp comprises: a cylindrical shell, an annular end cover, a lampshade and an LED lamp bead group, wherein the annular end cover is installed at the end portion of the cylindrical shell, the lampshade is a tubular structure at the upper end and a bowl-shaped structure at the lower end, a spherical member is arranged at the center of the bottom end surface of the lampshade and is engaged with a pedestal installed at the center of the cylindrical shell, and the LED lamp bead group is installed inside the lampshade; a light-transmitting plate 1 and a light-transmitting plate 2 are sealed and installed at the center of the annular end cover and the opening at the upper end of the lampshade respectively; a plurality of inclination adjustment members are evenly distributed on the outer wall of the lampshade, the inclination adjustment members include a connecting rod and an adjusting bolt, the front end of the connecting rod is hinged on the outer wall of the lampshade, a plurality of threaded adjustment holes are evenly distributed on the annular end cover, the adjusting bolts are installed in the threaded adjustment holes, and the front end of the adjusting bolts is hinged to the rear end of the connecting rod.

[0007] Preferably, the inclination adjustment member also includes a snap joint, a fixed rod, and a telescopic rod. The snap joint is fixedly installed at the front end of the fixed rod, the front and rear ends of the connecting rod are respectively hinged to the rear end of the fixed rod and the lower end of the telescopic rod, and the front end of the adjusting bolt is fixedly connected to the upper end of the telescopic rod through a fixed bearing.

[0008] Preferably, the inclination adjusting member also includes two limit springs, and fixed ear plates are provided on the outer walls of the fixed rod, the connecting rod and the telescopic rod, and the two ends of the two limit springs are respectively installed between the two fixed ear plates of the fixed rod and the connecting rod, and the connecting rod and the telescopic rod.

[0009] Preferably, the upper end of the lampshade is a tubular structure, and an annular connecting plate is installed on the outer wall of the lampshade of the tubular structure. Annular grooves are symmetrically arranged on the upper and lower end surfaces of the annular connecting plate. The snap joint is a U-shaped structure, and a raised ridge is arranged on the inner side of the front end of the U-shaped snap joint. The two raised ridges of the snap joint are respectively engaged in the two annular grooves of the annular connecting plate.

[0010] Preferably, a waterproof bellows is installed on the outside of the inclination adjusting member, one end of the waterproof bellows is sealed with the outer wall of the lampshade, and the other end is sealed with the inner wall of the cylindrical shell and the lower end surface of the annular end cover.

[0011] Preferably, a tubular protrusion is provided in the center of the annular end surface of the upper end of the lampshade, an annular protrusion with an L-shaped cross-section is provided on the inner wall of the upper end of the lampshade, an annular sealing gasket 1 with an L-shaped cross-section is installed on the upper end surface of the lampshade inside the tubular protrusion and on the annular protrusion, an annular sealing gasket 2 with an F-shaped cross-section is provided above the tubular protrusion, and the edges of the second light-transmitting plate are clamped between the annular sealing gasket 1 and the annular sealing gasket 2; an annular upper cover is provided on the annular sealing gasket 2, and a plurality of fixing screws are evenly distributed on the annular upper cover, and the fixing screws pass through the annular upper cover and the annular sealing gasket 2 in sequence and are fixed on the tubular protrusion.

[0012] Preferably, the annular upper cover is provided with a plurality of upper cover threaded holes evenly distributed in a circle, the upper cover threaded hole is composed of two upper and lower cylindrical holes with different diameters, and its overall cross-section is T-shaped, the lower cylindrical hole of the upper cover threaded hole is provided with an internal thread, and an annular gasket is provided in the upper cylindrical hole of the upper cover threaded hole, the fixing screw passes through the annular gasket, and the external thread provided at the front end thereof is adapted to the internal thread of the upper cover threaded hole, and the upper cover threaded hole outside the end head of the fixing screw is filled with sealant.

[0013] Preferably, a spherical blind hole is provided in the center of the support platform, the diameter of the spherical blind hole is larger than the diameter of the spherical member, and the spherical member at the bottom of the lampshade is installed in the spherical blind hole of the support platform.

[0014] Preferably, a mounting plate is provided on the outer wall of the cylindrical shell, and mounting screw holes are provided on the mounting plate. Fixing screws are installed in the mounting screw holes to fix the cylindrical shell.

[0015] Preferably, a wire installation hole is provided on the outer wall of the cylindrical shell, and a power wire is installed in the wire installation hole through sealing glue. The inner end of the power wire passes through the outer wall of the lampshade and is connected to the LED lamp bead group inside the lampshade, and the outer end is used to be connected to the power supply.

[0016] The beneficial effects of the present invention are:

[0017] The present invention discloses a waterproof structure for an underground lamp. A light-transmitting plate 1 and a light-transmitting plate 2 are respectively installed in a sealed manner at the center of the annular end cover and the upper opening of the lampshade, so that the LED lamp bead group installed in the lampshade is under double sealing protection; at the same time, by combining the spherical member installed in the center of the bottom of the lampshade with the support provided in the center of the cylindrical shell as the support point for adjusting the angle of the lampshade and the LED lamp bead group, the universal adjustment of the angle of the lampshade and the LED lamp bead group can be achieved by adjusting the adjustment bolts of multiple inclination adjustment members installed on the outer wall of the lampshade up and down, and the lampshade and the LED lamp bead group in adjustment will not cause the change of the overall external structure of the underground lamp, will not affect its waterproof sealing effect, and will not easily cause accidental collision. The present invention discloses a waterproof structure for an underground lamp, which has a compact structure, double sealing installation, good waterproof effect, and is not easy to cause damage due to rust of parts and circuit short circuit; the universal adjustment of the illumination angle of the LED lamp bead group can be achieved without disassembly, the adjustment angle is large, and the waterproof sealing effect will not be affected, and the operation is convenient; at the same time, the underground lamp and its illumination angle adjustment device will not be exposed to the outside, will not easily cause accidental collision, and are safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A schematic structural diagram of the present invention;

[0019] Figure 2 : A structural cross-sectional view of the present invention;

[0020] Figure 3 : Figure 2 A magnified view of the structure at center;

[0021] Figure 4 : A schematic structural diagram of the inclination adjusting member of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the embodiments. It should be noted that these are merely examples and illustrations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should be deemed to fall within the protection scope of the present invention.

[0023] Embodiment 1:

[0024] like Figure 1-4As shown, a waterproof structure of an underground lamp includes: a cylindrical shell 1, an annular end cover 2, a lampshade 3 and an LED lamp bead group.

[0025] The annular end cover 2 is installed at the end portion of the cylindrical shell 1. The lampshade 3 is a tubular structure at the upper end and a bowl-shaped structure at the lower end. A spherical part 31 is provided in the center of the bottom end surface of the lampshade 3 and is engaged with the base 13 installed in the center of the cylindrical shell 1. The LED lamp bead group is installed inside the lampshade 3.

[0026] A light-transmitting plate 1 21 and a light-transmitting plate 2 4 are respectively sealed and installed at the center of the annular end cover 2 and the upper opening of the lampshade 3 .

[0027] A plurality of inclination adjustment members 6 are evenly distributed on the outer wall of the lampshade 3, and the inclination adjustment member 6 includes a snap joint 61, a fixing rod 62, a connecting rod 63, a telescopic rod 64 and an adjusting bolt 65. The snap joint 61 is fixedly mounted on the front end of the fixing rod 62 and is hinged on the outer wall of the lampshade 3. The front and rear ends of the connecting rod 63 are respectively hinged to the rear end of the fixing rod 62 and the lower end of the telescopic rod 64. A plurality of threaded adjustment holes 22 are evenly distributed on the annular end cover 2. The adjusting bolt 65 is installed in the threaded adjustment hole 22, and the front end of the adjusting bolt 65 is fixedly connected to the upper end of the telescopic rod 64 through a fixed bearing 66.

[0028] The present invention discloses a waterproof structure for an underground lamp. A light-transmitting plate 1 21 and a light-transmitting plate 2 4 are respectively installed in a sealed manner at the center of the annular end cover 2 and the upper opening of the lampshade 3, so that the LED lamp bead group installed in the lampshade 3 is under double sealing protection, and the waterproof effect is good. By using the joint of the spherical member 31 installed at the center of the bottom of the lampshade 3 and the support 13 provided at the center of the inner part of the cylindrical shell 1 as the bearing point for adjusting the angle of the lampshade 3 and the LED lamp bead group, the universal adjustment of the angle of the lampshade 3 and the LED lamp bead group can be achieved by adjusting the adjusting bolts 65 of the multiple inclination adjusting members 6 installed on the outer wall of the lampshade 3 up and down, and the lampshade 3 and the LED lamp bead group during the angle adjustment will not cause the change of the overall external structure of the underground lamp, and will not affect its overall waterproof sealing effect. At the same time, during the angle adjustment of the lampshade 3 and the LED lamp bead group, there is no need to disassemble the entire underground lamp, and it will not be exposed on the ground, and it is not easy to cause accidental contact, which is safe and reliable.

[0029] Embodiment 2:

[0030] like Figure 1-4 As shown, a waterproof structure of an underground lamp includes: a cylindrical shell 1, an annular end cover 2, a lampshade 3 and an LED lamp bead group.

[0031] The annular end cover 2 is installed at the end of the cylindrical shell 1. A mounting plate 11 is provided on the outer wall of the cylindrical shell 1. A mounting screw hole 12 is provided on the mounting plate 11. The mounting screw hole 12 is installed with a fixing screw to fix the cylindrical shell 1 and the entire underground lamp in a preset underground hole on the ground.

[0032] A wire installation hole 16 is provided on the outer wall of the cylindrical housing 1, and a power wire 5 is installed in the wire installation hole 16 through a sealant. The inner end of the power wire 5 passes through the outer wall of the lampshade 3 and is connected to the LED lamp bead group inside the lampshade 3, and the outer end is used to be connected to the power supply. The connection of the power wire 5 can provide power to the LED lamp bead group in the buried lamp.

[0033] A light-transmitting plate 1 21 and a light-transmitting plate 2 4 are respectively sealed and installed at the center of the annular end cover 2 and the upper opening of the lampshade 3 . The light-transmitting plate 1 21 and the light-transmitting plate 2 4 are illumination windows for the LED lamp bead group inside the lampshade 3 .

[0034] Among them, a tubular protrusion 33 is arranged at the center of the annular end surface of the upper end of the lampshade 3, an annular protrusion 34 with an L-shaped cross section is arranged on the inner wall of the upper end of the lampshade 3, an annular sealing gasket 1 35 with an L-shaped cross section is installed on the upper end surface of the lampshade 3 inside the tubular protrusion 33 and on the annular protrusion 34, an annular sealing gasket 2 36 with an F-shaped cross section is arranged above the tubular protrusion 33, and the edge of the light-transmitting plate 24 is clamped between the annular sealing gasket 1 35 and the annular sealing gasket 2 36. An annular upper cover 7 is arranged on the annular sealing gasket 2 36, and a plurality of fixing screws 72 are evenly arranged on the annular upper cover 7, and the fixing screws 72 pass through the annular upper cover 7 and the annular sealing gasket 2 36 in sequence and are fixed on the tubular protrusion 33.

[0035] Among them, the annular upper cover 7 is provided with a plurality of upper cover threaded holes 71 evenly distributed in a circle. The upper cover threaded hole 71 is composed of two upper and lower cylindrical holes with different diameters, and its overall cross-section is T-shaped. The lower cylindrical hole of the upper cover threaded hole 71 is provided with an internal thread, and an annular gasket 73 is provided in the upper cylindrical hole of the upper cover threaded hole 71. The fixing screw 72 passes through the annular gasket 73, and the external thread provided at the front end thereof is adapted to the internal thread of the upper cover threaded hole 71. The upper cover threaded hole 71 outside the end head of the fixing screw 72 is filled with sealant.

[0036] The LED lamp bead group inside the lampshade 3 is in the double sealed waterproof protection of the light-transmitting plate 1 21 and the light-transmitting plate 2 4, and the sealing effect is good, which greatly reduces the short-circuit hazard caused by water vapor to the circuit of the LED lamp bead.

[0037] The lampshade 3 is a tubular structure at the upper end and a bowl-shaped structure at the lower end. A spherical part 31 is provided at the center of the bottom end surface of the lampshade 3 and is engaged with the support 13 installed at the center of the cylindrical housing 1. The LED lamp bead group is installed inside the lampshade 3. A spherical blind hole 131 is provided at the center of the support 13. The diameter of the spherical blind hole 131 is larger than the diameter of the spherical part 31. The spherical part 31 at the bottom of the lampshade 3 is installed in the spherical blind hole 131 of the support 13. The spherical blind hole 131 serves as a bearing point for the lampshade 3, which facilitates the rotation of the lampshade 3 and the adjustment of the tilt angle.

[0038] There are multiple inclination adjustment members 6 evenly distributed on the outer wall of the lampshade 3. The inclination adjustment member 6 includes a snap joint 61, a fixed rod 62, a connecting rod 63, a telescopic rod 64, an adjustment bolt 65 and two limit springs 67. The snap joint 61 is fixedly installed at the front end of the fixed rod 62 and hinged on the outer wall of the lampshade 3. The front and rear ends of the connecting rod 63 are hinged to the rear end of the fixed rod 62 and the lower end of the telescopic rod 64 respectively. There are multiple threaded adjustment holes 22 evenly distributed on the annular end cover 2. The adjustment bolt 65 is installed in the threaded adjustment hole 22. The front end of the adjustment bolt 65 is fixedly connected to the upper end of the telescopic rod 64 through a fixed bearing 66; the threaded adjustment hole 22 is also composed of two cylindrical holes with different diameters, and its overall cross-section is T-shaped. The adjustment bolt 65 is in the threaded adjustment hole 22 during the entire adjustment process and will not be exposed to the outside. The outer walls of the fixed rod 62 , the connecting rod 63 and the telescopic rod 64 are all provided with fixing ear plates, and the two ends of the two limit springs 67 are respectively installed between the two fixing ear plates of the fixed rod 62 and the connecting rod 63 , and the connecting rod 63 and the telescopic rod 64 .

[0039] The upper end of the lampshade 3 is a tubular structure, and an annular connecting plate 32 is installed on the outer wall of the tubular structure lampshade 3. Annular grooves are symmetrically arranged on the upper and lower end surfaces of the annular connecting plate 32. The snap joint 61 is a U-shaped structure, and a raised ridge is arranged on the inner side of the front end of the U-shaped snap joint 61. The two raised ridges of the snap joint 61 are respectively engaged in the two annular grooves of the annular connecting plate 32.

[0040] A waterproof bellows 68 is installed outside the inclination adjusting member 6, one end of the waterproof bellows 68 is sealed with the outer wall of the lampshade 3, and the other end is sealed with the inner wall of the cylindrical shell 1 and the lower end surface of the annular end cover 2. The cylindrical shell 1 and the waterproof bellows 68 can make the inclination adjusting member 6 in a double waterproof protection, and also reduce the risk of rust of various components in the inclination adjusting member 6.

[0041] First, by adjusting the adjusting bolt 65 of the inclination adjusting member 6 up and down in the threaded adjusting hole 22, and then acting on the outer wall of the lampshade 3 through the telescopic rod 64, the connecting rod 63, the fixing rod 62 and the snap joint 61 in turn, the inclination direction of the lampshade 3 and the LED lamp bead group can be adjusted; then, the lampshade 3 and the LED lamp bead group can ensure the stability of the inclination direction of the entire lampshade 3 and the LED lamp bead group under the force adjustment of multiple inclination adjusting members 6. Finally, a plug is installed in the threaded adjusting hole 22 to seal it to prevent water flow or water vapor from penetrating into the cylindrical shell 1 and the waterproof bellows 68 through the threaded adjusting hole 22, thereby causing the risk of rust to the various components in the inclination adjusting member 6. In summary, the universal stable adjustment of the illumination angle of the lampshade 3 and the LED lamp bead group is achieved.

[0042] The present invention discloses a waterproof structure for an underground lamp. A light-transmitting plate 1 21 and a light-transmitting plate 2 4 are respectively installed in a sealed manner at the center of the annular end cover 2 and the upper opening of the lampshade 3, so that the LED lamp bead group installed in the lampshade 3 is under double sealing protection, and the waterproof effect is good. By using the joint of the spherical member 31 installed at the center of the bottom of the lampshade 3 and the support 13 provided at the center of the inner part of the cylindrical shell 1 as the bearing point for adjusting the angle of the lampshade 3 and the LED lamp bead group, the universal adjustment of the angle of the lampshade 3 and the LED lamp bead group can be achieved by adjusting the adjusting bolts 65 of the multiple inclination adjusting members 6 installed on the outer wall of the lampshade 3 up and down, and the lampshade 3 and the LED lamp bead group during the angle adjustment will not cause the change of the overall external structure of the underground lamp, and will not affect its overall waterproof sealing effect. At the same time, during the angle adjustment of the lampshade 3 and the LED lamp bead group, there is no need to disassemble the entire underground lamp, and it will not be exposed on the ground, and it is not easy to cause accidental contact, which is safe and reliable.

[0043] The present invention discloses an underground lamp waterproof structure, which has a compact structure, a double-sealed installation, a good waterproof effect, and is not easy to be damaged by rust of parts and circuit short circuit; the illumination angle of the LED lamp bead group can be universally adjusted without disassembly, the adjustment angle is large, and the waterproof sealing effect will not be affected, and the operation is convenient; at the same time, the underground lamp and its illumination angle adjustment device will not be exposed to the outside, and it is not easy to cause accidental contact, so it is safe and reliable.

[0044] The above is an exemplary description of the invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A waterproof structure for underground lighting, characterized in that: include: A cylindrical housing (1), an annular end cover (2), a lampshade (3) and an LED lamp bead group, wherein the annular end cover (2) is mounted on the end portion of the cylindrical housing (1); the lampshade (3) is a tubular structure at the upper end and a bowl structure at the lower end; a spherical member (31) is provided at the center of the bottom end surface of the lampshade (3) and is engaged with a support (13) installed at the center of the cylindrical housing (1); and the LED lamp bead group is installed inside the lampshade (3); a light-transmitting plate is sealed and mounted at the center of the annular end cover (2) and the upper end opening of the lampshade (3). One (21), a light-transmitting plate two (4); a plurality of inclination adjustment members (6) are evenly distributed on the outer wall of the lampshade (3), and the inclination adjustment members (6) include a connecting rod (63) and an adjustment bolt (65), the front end of the connecting rod (63) is hinged on the outer wall of the lampshade (3), and a plurality of threaded adjustment holes (22) are evenly distributed on the annular end cover (2), and the adjustment bolt (65) is installed in the threaded adjustment hole (22), and the front end of the adjustment bolt (65) is hinged to the rear end of the connecting rod (63).

2. The waterproof structure of an underground lamp according to claim 1, characterized in that: The inclination adjustment member (6) further comprises a snap joint (61), a fixed rod (62), and a telescopic rod (64); the snap joint (61) is fixedly mounted on the front end of the fixed rod (62); the front and rear ends of the connecting rod (63) are respectively hinged to the rear end of the fixed rod (62) and the lower end of the telescopic rod (64); and the front end of the adjusting bolt (65) is fixedly connected to the upper end of the telescopic rod (64) via a fixed bearing (66).

3. The waterproof structure of an underground lamp according to claim 2, characterized in that: The inclination adjustment member (6) further comprises two limit springs (67), and the outer walls of the fixed rod (62), the connecting rod (63) and the telescopic rod (64) are all provided with fixed ear plates, and the two ends of the two limit springs (67) are respectively installed between the two fixed ear plates of the fixed rod (62) and the connecting rod (63), and between the two fixed ear plates of the connecting rod (63) and the telescopic rod (64).

4. The waterproof structure of an underground lamp according to claim 2, characterized in that: The upper end of the lampshade (3) is a tubular structure, an annular connecting plate (32) is installed on the outer wall of the tubular structure lampshade (3), annular grooves are symmetrically arranged on the upper and lower end surfaces of the annular connecting plate (32), the snap joint (61) is a U-shaped structure, and a raised ridge is arranged on the inner side of the front end of the U-shaped snap joint (61), and the two raised ridges of the snap joint (61) are respectively engaged in the two annular grooves of the annular connecting plate (32).

5. A waterproof structure for underground lamps according to any one of claims 1 to 4, characterized in that: A waterproof bellows (68) is installed on the outside of the inclination adjustment member (6), one end of the waterproof bellows (68) is sealed with the outer wall of the lampshade (3), and the other end is sealed with the inner wall of the cylindrical shell (1) and the lower end surface of the annular end cover (2).

6. A waterproof structure for underground lamps according to any one of claims 1 to 4, characterized in that: A tubular protrusion (33) is arranged at the center of the annular end surface of the upper end of the lampshade (3); an annular protrusion (34) with an L-shaped cross section is arranged on the inner wall of the upper end of the lampshade (3); an annular sealing gasket (35) with an L-shaped cross section is installed on the upper end surface of the lampshade (3) inside the tubular protrusion (33) and on the annular protrusion (34); an annular sealing gasket (36) with an F-shaped cross section is arranged above the tubular protrusion (33); the edge of the light-transmitting plate (4) is clamped between the annular sealing gasket (35) and the annular sealing gasket (36); an annular upper cover (7) is arranged on the annular sealing gasket (36); a plurality of fixing screws (72) are evenly arranged on the annular upper cover (7); the fixing screws (72) pass through the annular upper cover (7) and the annular sealing gasket (36) in sequence and are fixed on the tubular protrusion (33).

7. The waterproof structure of an underground lamp according to claim 6, characterized in that: The annular upper cover (7) is provided with a plurality of upper cover threaded holes (71) evenly distributed in a circle. The upper cover threaded hole (71) is composed of two upper and lower cylindrical holes with different diameters, and its overall cross-section is T-shaped. The lower cylindrical hole of the upper cover threaded hole (71) is provided with an internal thread, and an annular gasket (73) is provided in the upper cylindrical hole of the upper cover threaded hole (71). The fixing screw (72) passes through the annular gasket (73), and the external thread provided at the front end thereof is matched with the internal thread of the upper cover threaded hole (71). The upper cover threaded hole (71) outside the end of the fixing screw (72) is filled with sealant.

8. The waterproof structure of an underground lamp according to claim 2, characterized in that: A spherical blind hole (131) is provided at the center of the support platform (13); the diameter of the spherical blind hole (131) is larger than the diameter of the spherical component (31); and the spherical component (31) at the bottom of the lampshade (3) is installed in the spherical blind hole (131) of the support platform (13).

9. The waterproof structure of an underground lamp according to claim 1, characterized in that: A mounting plate (11) is provided on the outer wall of the cylindrical shell (1), and mounting screw holes (12) are provided on the mounting plate (11). Fixing screws are installed in the mounting screw holes (12) to fix the cylindrical shell (1).

10. The waterproof structure of an underground lamp according to claim 1, characterized in that: The outer wall of the cylindrical housing (1) is provided with a wire installation hole (16), and a power supply wire (5) is installed in the wire installation hole (16) by sealing with a sealant. The inner end of the power supply wire (5) passes through the outer wall of the lampshade (3) and is connected to the LED lamp bead group inside the lampshade (3), and the outer end is used to be connected to the power supply.

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