Street lamp

Abstract

The utility model discloses a street lamp which comprises a shell and a circuit board arranged in the shell, a plurality of lamp beads are arranged on the circuit board, and the street lamp is characterized in that the shell comprises an upper shell and a lower shell which are detachably connected, the upper shell is provided with a hollow part, the circuit board is arranged on the back face of the upper shell, and all the lamp beads of the circuit board are located in the hollow part. Cooling fins are arranged on the back face of the circuit board. The upper shell of the street lamp is provided with the hollowed-out part, the circuit board is located on the back face of the shell, all the lamp beads are located in the hollowed-out part, and the cooling fins are directly arranged on the back face of the circuit board, so that heat emitted by the lamp beads is directly transmitted to the outside through the circuit board and the cooling fins when the street lamp works, the heat conduction link is reduced, heat resistance is lower, and heat dissipation is facilitated; and the heat dissipation effect of the street lamp is better.

Description

Technical Field

[0001] The utility model relates to the technical field of lamps, in particular to a street lamp. Background Art

[0002] The existing Chinese utility model patent application number CN202421881586.2 discloses a tool-free, quick-disassembly and assembly-disassembly electronic control assembly LED street light, comprising a light source assembly, an electronic control assembly, a lamp body, and a power supply cover. The light source assembly is mounted within the lamp body, and the power supply cover and the lamp body are connected to each other by a detachable hinged structure. The electronic control assembly is mounted on the inner surface of the power supply cover, and an electronic control box is provided at a position opposite the lamp body and the power supply cover. A fastener is also provided between the lamp body and the power supply cover. After the power supply cover is mounted on the electronic control box, the fastener secures the power supply cover and the electronic control box to thereby enclose the electronic control assembly within the electronic control box. In actual use, the heat generated by the circuit board and the lamp beads of this street light can only be dissipated through the housing, resulting in poor heat dissipation. A large amount of heat remains within the housing, causing the temperature inside the housing to rise. Some street lights also have a heat dissipation structure on the housing, but this structure has many heat conduction links, high thermal resistance, and poor heat dissipation. Utility Model Content

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a street lamp with better heat dissipation effect.

[0004] To this end, the present invention is achieved by adopting the following technical solutions:

[0005] A street lamp comprises a shell and a circuit board arranged in the shell, wherein a plurality of lamp beads are provided on the circuit board. The street lamp is characterized in that: the shell comprises a detachably connected upper shell and a lower shell, the upper shell has a hollow portion, the circuit board is arranged on the back of the upper shell and all the lamp beads of the circuit board are located in the hollow portion, and a heat sink is provided on the back of the circuit board.

[0006] Furthermore, the heat sink is provided with a number of upwardly protruding ridges, and a first ventilation duct is formed between adjacent ridges. The ridges are provided with heat dissipation holes along their length directions, and the heat dissipation holes form a second ventilation duct. The heat sink is an integrally formed metal sheet, and the ridges are straight or wavy.

[0007] Furthermore, an upwardly raised cavity is provided on one side of the upper shell, and the cavity is used to place the power cord. One end of the power cord extends into the hollow portion to be connected to the circuit board, and the other end passes through the cavity to be connected to the external power supply.

[0008] Furthermore, the chamber is located on one side of the heat sink, and the upper shell is provided with a panel surrounding the other three sides of the heat sink, and the front and rear sides of the panel are provided with air holes communicating with the first channel, and the height of the panel is higher than or equal to the height of the protrusion, and there is a gap between the panel and the heat sink, and at least one drainage hole is provided on the front and rear sides of the panel.

[0009] Furthermore, the outer ring of the lower shell is provided with several mounting holes, and the upper shell is provided with internal threaded columns aligned with the mounting holes. The upper shell and the lower shell are detachably connected by inserting screws into the mounting holes and screwing into the internal threaded columns. The lower shell is provided with a light-transmitting cover aligned with the lamp beads.

[0010] Furthermore, a circle of first glue grooves is provided at the lower end of the upper shell, and the lower shell is bonded by gluing in the first glue grooves. A circle of second glue grooves is provided on the upper shell between the enclosure and the chamber, and the front of the circuit board is bonded by gluing in the second glue grooves.

[0011] Furthermore, the heat sink is bonded to the circuit board by glue.

[0012] Furthermore, the circuit board is an aluminum substrate, which is composed of a conductive layer, an insulating layer and an aluminum plate from top to bottom, and the heat sink and the aluminum plate are welded by laser.

[0013] Furthermore, the upper shell on the outside of the chamber has a mounting portion, which is detachably connected to a mounting sleeve for mounting on a street light pole, and the mounting sleeve is provided with multiple assembly holes. The power cord passes through the mounting portion and the mounting sleeve, and the outer side of the mounting portion has an arc surface, and the left and right sides of the arc surface are provided with a plurality of first transverse teeth. The inner side of the mounting sleeve has an arc-shaped portion, and the arc-shaped portion is provided with second transverse teeth meshing with the first transverse teeth, and the arc-shaped portion is vertically provided with a strip-shaped through hole, and the mounting portion is provided with a threaded hole aligned with the strip-shaped through hole, and the upper shell and the mounting sleeve are fixed by passing a bolt through the strip through hole and tightening it into the threaded hole of the mounting portion.

[0014] Furthermore, a groove is provided at the upper end of the chamber, and a spirit level is embedded in the groove.

[0015] After adopting the above technical solution, the upper shell has a hollow part, the circuit board is located on the back of the shell, all the lamp beads are located in the hollow part, and the heat sink is directly arranged on the back of the circuit board. When the street lamp is working, the heat emitted by the lamp beads is directly transferred to the outside through the circuit board and the heat sink, reducing the heat conduction link, lowering the thermal resistance, facilitating heat dissipation, and making the heat dissipation effect of the street lamp better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model has the following drawings:

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is an exploded view of the structure of the utility model without the level;

[0019] Figure 3 This is an exploded view of the structure of the utility model from another perspective with the installation sleeve removed;

[0020] Figure 4 It is a schematic diagram of the partial internal structure of the utility model.

[0021] Figure numerals: 1. circuit board; 2. lamp bead; 3. upper shell; 4. lower shell; 5. hollow part; 6. heat sink; 7. convex strip; 8. first ventilation duct; 9. heat dissipation through hole; 10. chamber; 11. enclosure; 12. air vent; 13. drainage hole; 14. mounting hole; 15. internal thread column; 16. light-transmitting cover; 17. first glue groove; 18. second glue groove; 19. mounting part; 20. mounting sleeve; 21. assembly hole; 22. arc surface; 23. first transverse tooth; 24. arc-shaped part; 25. second transverse tooth; 26. strip-shaped through hole; 27. bolt; 28. embedded groove; 29. ​​spirit level. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0023] With reference to the above-mentioned drawings, a street lamp provided by the present invention includes a shell and a circuit board 1 arranged in the shell, a plurality of lamp beads 2 are arranged on the circuit board 1, the shell includes a detachably connected upper shell 3 and a lower shell 4, the upper shell 3 has a hollow portion 5, the circuit board 1 is arranged on the back of the upper shell 3 and all the lamp beads 2 of the circuit board 1 are located in the hollow portion 5, a heat sink 6 is provided on the back of the circuit board 1, the heat sink 6 is provided with a plurality of upwardly protruding ribs 7, and a first ventilation duct 8 is formed between adjacent ribs 7, the ribs 7 are penetrated along their length direction with heat dissipation holes 9, and the heat dissipation holes 9 form a second ventilation duct, the heat sink 6 is an integrally formed metal sheet, the ribs 7 are straight or wavy, and one side of the upper shell 3 A chamber 10 is provided that bulges upward, and the chamber 10 is used to place the power cord. One end of the power cord extends into the hollow portion 5 and is connected to the circuit board 1, and the other end passes through the chamber 10 and is connected to the external power supply. The chamber 10 is located on one side of the heat sink 6, and the upper shell 3 is provided with a panel 11 that surrounds the other three sides of the heat sink 6. The front and rear sides of the panel 11 are provided with air holes 12 that communicate with the first channel, and the height of the panel 11 is higher than or equal to the height of the ridge 7. There is a gap between the panel 11 and the heat sink 6, and the front and rear sides of the panel 11 are provided with at least one drainage hole 13. The outer ring of the lower shell 4 is provided with a plurality of mounting holes 14, and the upper shell 3 is provided with an internal threaded column 15 aligned with the mounting hole 14, which is inserted into the mounting hole 14 by a screw and screwed into the internal screw The column 15 realizes the detachable connection between the upper shell 3 and the lower shell 4. The lower shell 4 is provided with a light-transmitting cover 16 aligned with the lamp bead 2. The lower end of the upper shell 3 is provided with a circle of first glue groove 17, and the lower shell 4 is bonded by gluing in the first glue groove 17. The upper shell 3 between the enclosure 11 and the chamber 10 is provided with a circle of second glue groove 18, and the front of the circuit board 1 is bonded by gluing in the second glue groove 18. The heat sink 6 is bonded to the circuit board 1 by glue. The circuit board 1 is an aluminum substrate, which is composed of a conductive layer, an insulating layer and an aluminum plate from top to bottom (the orientation when the lamp bead 2 is facing upward). The heat sink 6 and the aluminum plate are laser welded. The upper shell 3 outside the chamber 10 has a mounting portion 19, and the mounting portion 19 is detachably connected. A mounting sleeve 20 for installation on a street light pole is provided with a plurality of assembly holes 21 on the mounting sleeve 20. The power cord passes through the mounting portion 19 and the mounting sleeve 20. The outer side of the mounting portion 19 has an arc surface 22, and a plurality of first transverse teeth 23 are provided on the left and right sides of the arc surface 22. The inner side of the mounting sleeve 20 has an arc portion 24, and the arc portion 24 is provided with a second transverse tooth 25 that engages with the first transverse teeth 23, and the arc portion 24 is vertically provided with a strip-shaped through hole 26. The mounting portion 19 is provided with a threaded hole aligned with the strip-shaped through hole 26. The upper shell 3 and the mounting sleeve 20 are fixed by passing a bolt 27 through the strip through hole 26 and tightening it into the threaded hole of the mounting portion 19. The upper end of the chamber 10 is provided with an embedding groove 28, and a spirit level 29 is embedded in the embedding groove 28.

[0024] In this embodiment, the upper housing 3 has a hollow portion 5, the circuit board 1 is located on the back of the housing, all the lamp beads 2 are located in the hollow portion 5, and the heat sink 6 is directly provided on the back of the circuit board 1. When the street lamp is working, the heat emitted by the lamp beads 2 is directly transferred to the outside through the circuit board 1 and the heat sink 6, which reduces the heat conduction link, lowers the thermal resistance, facilitates heat dissipation, and improves the heat dissipation effect of the street lamp.

[0025] The provision of the first ventilation duct 8 and the second ventilation duct greatly increases the contact area between the heat sink 6 and the air and wind flow, so that the heat sink 6 can quickly dissipate the heat generated by the lamp beads 2 and the circuit board 1, thereby achieving rapid cooling of the lamp beads 2 and the circuit board 1, improving the heat dissipation effect, and also reducing light decay, thereby extending the service life of the street lamp;

[0026] The heat sink 6 is an integrally formed metal sheet, which conducts and dissipates heat more evenly. The wavy ribs 7 can further increase the contact area with air and wind flow, further enhancing the heat dissipation effect.

[0027] The heat sink 6 is surrounded by the chamber 10 and the enclosure 11, which effectively prevents the heat sink 6 from harming people or objects, and at the same time protects the heat sink 6, making it safer and more beautiful. The heat sink 6 can be made thinner after being protected by the chamber 10 and the enclosure 11, reducing costs. The provision of the air vents 12 facilitates convection between the heat sink 6 and the outside to ensure heat dissipation effect. The provision of the gap avoids blocking the first ventilation duct 8 and the second ventilation duct, thereby ensuring normal heat dissipation of the first ventilation duct 8 and the second ventilation duct. The drainage holes 13 can drain rainwater.

[0028] The heat sink 6 can be bonded to the circuit board 1 by glue, and the heat sink 6 and the aluminum substrate type circuit board 1 can be laser welded. The two are in direct contact, which further reduces the heat conduction link and makes the heat dissipation effect of the street lamp better;

[0029] During assembly, the angles of the upper shell 3 and the mounting sleeve 20 can be adjusted by the first transverse tooth 23 and the second transverse tooth 25, which makes the applicability stronger. After adjusting the angle, the bolt 27 is passed through the strip through hole 26 and tightened into the threaded hole of the mounting portion 19 to fix the upper shell 3 and the mounting sleeve 20, and then the mounting sleeve 20 is put on the street light pole. The setting of the level 29 enables the staff to align the upper shell 3 and other structures by rotating the mounting sleeve 20 during assembly so that the street light is facing the ground. Finally, the bolt is tightened through the assembly hole 21 to fix the mounting sleeve 20 on the street light pole to complete the installation of the street light.

Claims

1. A street lamp comprising a housing and a circuit board disposed within the housing, wherein the circuit board is provided with a plurality of lamp beads, wherein: The shell comprises an upper shell and a lower shell that are detachably connected. The upper shell has a hollow portion. The circuit board is arranged on the back of the upper shell and all the lamp beads of the circuit board are located in the hollow portion. A heat sink is provided on the back of the circuit board.

2. A street lamp according to claim 1, characterized in that: The heat sink is provided with a plurality of upwardly protruding ribs, and a first ventilation duct is formed between adjacent ribs. The ribs are provided with heat dissipation holes along their length, and the heat dissipation holes form a second ventilation duct. The heat sink is an integrally formed metal sheet, and the ribs are straight or wavy.

3. A street lamp according to claim 2, characterized in that: A cavity that bulges upward is provided on one side of the upper shell, and the cavity is used to place a power cord. One end of the power cord extends into the hollow portion and is connected to the circuit board, and the other end passes through the cavity and is connected to an external power supply.

4. A street lamp according to claim 3, characterized in that: The chamber is located on one side of the heat sink, and the upper shell is provided with a panel surrounding the other three sides of the heat sink. The front and rear sides of the panel are provided with air holes communicating with the first channel, and the height of the panel is higher than or equal to the height of the convex strip. There is a gap between the panel and the heat sink, and at least one drainage hole is provided on the front and rear sides of the panel.

5. A street lamp according to claim 4, characterized in that: The outer ring of the lower shell is provided with several mounting holes, and the upper shell is provided with internal threaded columns aligned with the mounting holes. The upper shell and the lower shell are detachably connected by inserting screws into the mounting holes and screwing into the internal threaded columns. The lower shell is provided with a light-transmitting cover aligned with the lamp beads.

6. A street lamp according to claim 5, characterized in that: A circle of first glue grooves is provided at the lower end of the upper shell, and the lower shell is bonded by gluing in the first glue grooves. A circle of second glue grooves is provided on the upper shell between the enclosure and the chamber, and the front of the circuit board is bonded by gluing in the second glue grooves.

7. A street lamp according to claim 6, characterized in that: The heat sink is bonded to the circuit board by glue.

8. The street lamp according to claim 6, characterized in that: The circuit board is an aluminum substrate, which consists of a conductive layer, an insulating layer and an aluminum plate from top to bottom. The heat sink and the aluminum plate are welded by laser.

9. A street lamp according to claim 7 or 8, characterized in that: The upper shell outside the chamber has a mounting portion, which is detachably connected to a mounting sleeve for mounting on a street light pole. The mounting sleeve is provided with multiple assembly holes. The power cord passes through the mounting portion and the mounting sleeve. The outer side of the mounting portion has an arc surface, and the left and right sides of the arc surface are provided with a plurality of first transverse teeth. The inner side of the mounting sleeve has an arc portion, and the arc portion is provided with second transverse teeth meshing with the first transverse teeth, and the arc portion is vertically provided with a strip-shaped through hole. The mounting portion is provided with a threaded hole aligned with the strip-shaped through hole, and the upper shell and the mounting sleeve are fixed by passing a bolt through the strip through hole and tightening it into the threaded hole of the mounting portion.

10. A street lamp according to claim 7 or 8, characterized in that: An embedding groove is provided at the upper end of the chamber, and a level is embedded in the embedding groove.

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