Lighting device

Abstract

The utility model relates to the technical field of lighting devices, the lighting device comprises a heat dissipation base, a light source module and a lens, the heat dissipation base, the light source module and the lens are stacked in sequence; the lighting device is provided with a light emitting side and a back side opposite to the light emitting side, the light emitting side is the side provided with the lens, and the back side is the side provided with the heat dissipation base; a through hole is formed in the middle of the lighting device, the two ends of the through hole penetrate through the light emitting side and the back side of the lighting device respectively, so that a channel allowing airflow to pass through is formed in the middle of the lighting device, the lighting device has better heat dissipation performance, and the service life of a lamp is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of lighting device technology. Background Technology

[0002] High-power lighting devices are needed in stadiums, construction sites, outdoor lighting landscapes, residential areas, courtyards, and billboards. Structurally, high-power lighting devices generally include a lamp housing and a light source module and lens installed inside the lamp housing. The lighting device as a whole has a sealed structure.

[0003] The light source module generates a lot of heat when it is working. Since the lighting device is a sealed structure, the heat generated by the light source module is not easy to dissipate. This is especially true for high-power lighting devices. The higher the power of the LEDs, the more heat is generated during operation. If the heat is not dissipated in time, the temperature of the LEDs will rise rapidly, which will affect their lifespan and performance. Therefore, a good heat dissipation design is crucial for lighting devices. Utility Model Content

[0004] This invention provides a lighting device with better heat dissipation performance.

[0005] This utility model provides a lighting device, including:

[0006] A heat dissipation base, a light source module, and a lens are arranged in a sequentially stacked manner.

[0007] The lighting device has a light-emitting side and a back side facing away from the light-emitting side. The light-emitting side is the side where the lens is provided, and the back side is the side where the heat dissipation base is provided.

[0008] The lighting device has a through hole in the middle, and the two ends of the through hole pass through the light-emitting side and the back side of the lighting device, respectively, to form a channel for airflow in the middle of the lighting device.

[0009] In one technical solution, the back side of the heat dissipation base has a heat dissipation fin assembly, which includes multiple heat dissipation fins.

[0010] In one technical solution, the back side of the heat dissipation fin assembly is provided with a ventilation groove that intersects with the corresponding heat dissipation fin. The ventilation groove is formed by a notch on the back side of the corresponding heat dissipation fin of the heat dissipation fin assembly, and at least one extended portion of the ventilation groove intersects with the extended portion of the through hole.

[0011] In one technical solution, the lens is an integral structure, and both the lens and the heat sink base have a hole structure in the middle. At least one of the heat sink base and the lens has a protruding hole section that protrudes towards the other. A sealing ring is press-fitted between the protruding hole section and the other, so that the hole structure of the lens and the heat sink base constitutes at least part of the through hole, and the light source module is arranged around the protruding hole section.

[0012] In one technical solution, a sealing groove for accommodating the sealing ring is provided on the end face of the protruding hole section.

[0013] In one technical solution, the lens has a mounting hole that extends through the protruding section, the mounting hole being used to insert a screw, the screw being used to fix the lens on the heat sink base.

[0014] In one technical solution, one of the sealing groove and the sealing ring has a protrusion on its sidewall, and the other has a relief groove on its sidewall to avoid the protrusion. The protrusion surrounds the screw, and the sealing ring is installed in the sealing groove by engaging with the groove through the protrusion.

[0015] In one technical solution, the aperture structure of the lens is a stepped aperture with a larger diameter at one end on the light-emitting side.

[0016] In one technical solution, the stepped surface of the stepped hole has a mounting hole for a screw to be inserted, the screw being used to fix the lens onto the heat dissipation base.

[0017] In one technical solution, the through hole is a round hole, and the length of the through hole is between 55mm and 85mm.

[0018] The beneficial effects of this utility model are:

[0019] In this invention, the lighting device has a through hole in the middle of the lamp body, allowing airflow to pass through. When the lighting device is working, the temperature is highest at the middle position. Since the heat is generated by the light source module, the air in the part of the through hole corresponding to the light source module is heated into hot air. Hot air is less dense than cold air and will naturally rise. The hot air flows out from one end of the through hole, and the cold air flows in from the other end. In this way, a flowing airflow is formed in the through hole, realizing heat exchange and cooling, ensuring that the lighting device has better heat dissipation performance and improving the lamp's lifespan. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of one embodiment of the lamp in this utility model;

[0021] Figure 2 This is an exploded structural diagram of one embodiment of the lamp in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the light source module of one embodiment of the lamp in this utility model;

[0023] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the lens structure of one embodiment of the lamp in this utility model;

[0025] Figure 6 yes Figure 5 Enlarged view of a section at point B in the middle;

[0026] Figure 7 This is a partially enlarged structural diagram of the lens of one embodiment of the lamp in this utility model;

[0027] Figure 8 This is a partially enlarged structural diagram of the outer sealing ring of one embodiment of the lamp in this utility model;

[0028] Figure 9 This is a partially enlarged structural diagram of the lens of one embodiment of the lamp in this utility model;

[0029] Figure 10 This is a schematic diagram of the structure of the inner sealing ring of one embodiment of the lamp in this utility model;

[0030] Figure 11 This is a schematic diagram of the heat dissipation base of one embodiment of the lamp in this utility model from one perspective;

[0031] Figure 12 This is a schematic diagram of the back structure of the heat dissipation base of one embodiment of the lamp in this utility model.

[0032] List of feature names corresponding to the labels in the figure:

[0033] 1. Lamp body;

[0034] 11. Heat sink base; 111. Heat sink fin assembly; 112. Center hole of base; 113. Notch; 114. Ventilation slot;

[0035] 12. Light source module; 121. Substrate; 122. Lamp bead; 123. Splicing seam; 1231. Protruding part; 124. Light source center hole; 125. Wiring hole; 126. Positive electrode wiring structure; 127. Negative electrode wiring structure;

[0036] 13. Lens; 131. Outer mounting hole; 132. Middle mounting hole; 133. Inner mounting hole; 134. Flange; 135. First sealing groove; 1351. Bending groove section; 136. Lens center hole; 137. Protruding hole section; 138. Second sealing groove; 139. Protrusion;

[0037] 14. Sealing assembly; 141. Outer sealing ring; 1411. Bend; 1412. Sealing lip; 142. Inner sealing ring; 1421. Clearance groove; 143. Intermediate sealing ring;

[0038] 2. Bracket;

[0039] 3. Through hole. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0041] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0042] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0043] In this utility model, the lighting device has a through hole in the middle, which allows airflow to pass through the middle of the lighting device, carrying away the heat generated when the lighting device is working, and ensuring that the lighting device has better heat dissipation performance.

[0044] Embodiments of the lamps in this utility model:

[0045] Lighting fixtures, also known as lighting devices, are described in some embodiments, please refer to... Figure 1 The luminaire includes a lamp body 1 and a bracket 2. The bracket 2 is used for fixed installation at the target installation position to achieve fixed installation of the luminaire at the target installation position. The lamp body 1 is rotatably mounted on the bracket 2 so that the illumination angle of the lamp body 1 can be adjusted. In some other embodiments, the luminaire may only have a lamp body and not a bracket.

[0046] Please refer to further information. Figure 2 The lamp body 1 includes a heat dissipation base 11, a light source module 12, a lens 13, and a sealing assembly 14. The light source module 12 is mounted on the heat dissipation base 11, and the lens 13 is also mounted on the heat dissipation base 11. The heat dissipation base 11, the light source module 12, and the lens 13 are stacked sequentially. The lamp has a light-emitting side and a back side. The light-emitting side is the side where the lens 13 is located, and the back side is the side where the heat dissipation base 11 is located. That is, the lens 13 is located on the light-emitting side of the light source module 12, and the heat dissipation base 11 is located on the back side of the light source module 12.

[0047] Please refer to the structure of the light source module 12. Figure 3 The light source module 12 includes a substrate 121 and LED beads 122. The substrate 121 is a circuit board, such as a PCBA, and the LED beads 122 are capable of emitting light when powered. There are multiple LED beads 122, which are distributed on the substrate 121. Due to the large size of high-power lamps, the substrate 121 is a split structure for ease of manufacturing. That is, the substrate 121 is composed of at least two sub-boards, and a splicing seam 123 is formed between adjacent sub-boards. To avoid affecting the number of LED beads 122, the splicing seam 123 is set to avoid the installation position of the LED beads 122 on the substrate 121 based on the designed installation position of the LED beads 122. It is a process seam. The final product shows that the splicing seam 123 is set on the part of the substrate 121 between the LED beads 122 and has a bent part to form a protruding part 1231 on the corresponding sub-board that protrudes towards the adjacent sub-board. The LED beads 122 are set on the protruding part 1231.

[0048] In some embodiments, reference Figure 3 As can be seen, the substrate 121 of the light source module 12 is a circular plate with a central light source hole 124 at the center. There are four splicing seams 123, which are arranged at 90° intervals. Each splicing seam 123 extends from the edge of the substrate 121 to the central light source hole 124, dividing the substrate 121 into four sub-plates.

[0049] Furthermore, it can be seen that the LED beads 122 are arranged in multiple concentric rings, with the LED beads 122 in each ring evenly spaced, and the LED beads 122 between some rings are staggered along the circumference of the ring. Since the splicing seams 123 are set to avoid the LED beads 122, all four splicing seams 123 are bent seam structures, and each splicing seam has a different shape. The "evenly spaced LED beads" mentioned here refers to the uniform arrangement of the LED beads 122 as a whole. Because the light source module 12 needs to be mounted on the heat dissipation base plate 11, and some screws fixing the lens 13 pass through the light source module 12, some positions of the light source module 12 are missing LED beads to allow the screws to pass through. However, this does not affect the uniform arrangement of the LED beads 122 on the substrate 121.

[0050] More specifically, each bend in the seam 123 is a 90° bend, which increases the length of the seam 123 and the creepage distance. In other embodiments, the number of seams can divide the substrate into two separate boards. The bend angle of the seam can also be greater than 90° or less than 90°. Regarding the shape of the substrate, in other embodiments, it can also be rectangular or other non-circular shapes. Of course, depending on the distribution of the LEDs on the substrate, some seams can also be straight seams, and at least one seam can have a bend.

[0051] Please refer to Figure 4 The substrate 121 has a through hole 125 for power cables to pass through. The splicing seam 123 passes through the through hole 125, so that during wiring, the power cable can be clamped in the through hole 125 by aligning the two boards, improving the convenience of wiring. The substrate 121 has a positive terminal connection structure 126 and a negative terminal connection structure 127 located on both sides of the splicing seam 123 passing through the through hole 125. The light source module 12 is fixed on the heat sink 11.

[0052] Please refer to Figure 1 and Figure 2 Lens 13 is a one-piece structure, meaning it is a single, solid lens. Further reference... Figure 5 and Figure 6 Three rings of mounting holes are provided on the lens 13 from the outside to the inside: an outer mounting hole 131, a middle mounting hole 132, and an inner mounting hole 133. The outer mounting hole 131 is located at the edge of the lens 13, the inner mounting hole 133 is located at the center of the lens 13, and the middle mounting hole 132 is located radially between the outer mounting hole 131 and the inner mounting hole 133. Corresponding fixing holes are provided on the heat sink base 11. The fixing holes are threaded holes, and the lens 13 can be fixed to the heat sink base 11 by inserting screws into the mounting holes and threading them into the fixing holes.

[0053] To ensure a tight seal, the edge of the lens 13 facing the heat sink 11 has a flange 134 protruding towards the heat sink 11, and the flange 134 has a first sealing groove 135. Please refer to... Figure 2 The sealing assembly 14 includes an outer sealing ring 141, which is installed within the first sealing groove 135 and partially exposed within the first sealing groove 135, being pressed between the lens 13 and the heat dissipation base 11. In other embodiments, the first sealing groove may also be disposed on the heat dissipation base 11.

[0054] The outer mounting hole 131 passes through the flange 134. To avoid the outer mounting hole 131, please refer to [reference needed]. Figure 7 The first sealing groove 135 has a bent groove section 1351, please refer to... Figure 8 The outer sealing ring 141 is shaped to match the heat dissipation base 11 and also has a bent portion 1411. To improve sealing, in some embodiments, the outer sealing ring 141 also has a sealing lip 1412 on the surface facing the heat dissipation base 11. The sealing lip 1412 is thinner and more easily deformable than other parts of the outer sealing ring 141. Please refer to [reference needed]. Figure 8 In some embodiments, there are two sealing lips 1412, which are arranged at intervals. As those skilled in the art will know, in other embodiments, there may be only one sealing lip or more than two, such as three.

[0055] Lens 13 has a central lens hole 136 at its center. Please refer to [reference needed]. Figure 9 One section of the lens center hole 136 is a protruding hole section 137 that protrudes towards the heat sink base 11. Please refer to... Figure 2 The sealing assembly 14 includes an inner sealing ring 142. The end face of the protruding hole section 137 is provided with a second sealing groove 138 to accommodate the inner sealing ring 142. The inner sealing ring 142 is embedded in the second sealing groove 138 and pressed between the lens 13 and the heat sink base 11. The light source module 12 is arranged around the protruding hole section 137.

[0056] The inner mounting hole 133 penetrates the protruding hole section 137 and passes through the second sealing groove 138. The inner wall of the second sealing groove 138 has a protrusion 139 that protrudes into the second sealing groove 138 to form part of the inner mounting hole 133's hole wall. Please refer to the corresponding... Figure 10 The inner sealing ring 142 has a relief groove 1421 to avoid the protrusion 139, so that the inner sealing ring 142 can be inserted into the second sealing groove 138.

[0057] In addition to avoidance, the engagement of the protrusion 139 with the avoidance groove 1421 prevents the inner sealing ring 142 from rotating after it is installed in the second sealing groove 138, thus reducing its wear. In other embodiments, to prevent the inner sealing ring 142 from rotating in the second sealing groove 138, a protrusion can be provided on the inner sealing ring, and an avoidance groove can be provided on the groove wall of the second sealing groove.

[0058] Please refer to Figure 6 The lens center hole 136 has a stepped hole structure, with a larger diameter at the end facing away from the heat dissipation base 11. This allows airflow to enter the lens center hole 136 in a direction opposite to the light output direction. One end of the inner mounting hole 133 is located on the stepped surface of this stepped hole.

[0059] The central mounting hole 132 is a countersunk hole structure, i.e., a stepped hole structure. Please refer to... Figure 2 The sealing assembly 14 includes an intermediate sealing ring 143. During installation, the intermediate sealing ring 143 is placed inside the intermediate mounting hole 132 and tightened by a screw inserted into the intermediate mounting hole 132 to achieve a seal.

[0060] Please refer to the structure of the heat sink 11 Figure 11 and Figure 12 The heat dissipation base 11 has a heat dissipation fin assembly 111 on its back side, which is composed of multiple heat dissipation fins. The heat dissipation base 11 has a base center hole 112 at its center, and the heat dissipation fins are arranged around the base center hole 112.

[0061] The heat dissipation fin assembly 111 has notches 113 on the back side of the heat dissipation fins. Each notch 113 forms three ventilation slots 114 on the heat dissipation fin assembly. The three ventilation slots 114 are arranged at intervals and intersect the corresponding heat dissipation fins evenly. Specifically, the heat dissipation fins are vertical strips, and the ventilation slots 114 are arranged horizontally. The extended portion of the middle ventilation slot 114 intersects the extended portion of the center hole 112 of the base. Regarding the number of ventilation slots, in other embodiments, there may be fewer than three, such as two or one, or more than three, such as four or more.

[0062] After the lamp body 1 is assembled, it has a through hole 3 in the middle. The through hole 3 consists of a lens center hole 136 and a base center hole 112. The two ends of the through hole 3 pass through the light-emitting side and the back side of the lamp, respectively. When the lamp is working, the light source module 12 heats up the air at the corresponding position in the through hole 3, forming hot air. Since the light-emitting direction of the lamp is tilted when it is working (for example, tilted downwards when used in a football field), the hot air in the through hole 3 will flow out towards the back of the lamp. At the same time, cold air enters the through hole 3 through the opening on the light-emitting side of the through hole 3. In this way, an airflow is formed in the through hole 3, which carries away the heat generated when the lamp is working, ensuring better heat dissipation. Since the extended part of one of the ventilation slots 114 intersects with the extended part of the through hole 3, the hot airflow can flow better over the heat dissipation fins, further improving the cooling effect. To ensure smooth airflow, the through hole 3 is a round hole, and the length of the through hole 3 is between 55mm and 85mm. In other embodiments, the through hole can also be a square hole or a polygonal hole.

[0063] In some embodiments, the through hole is a straight hole, meaning the axis of the through hole coincides with or is parallel to the centerline of the lamp body. In other embodiments, the through hole can also be an oblique hole, meaning the axis of the through hole forms an angle with the centerline of the lamp body. In some embodiments, the lamp body does not have a light-transmitting panel. In other embodiments, the lamp body can also have a light-transmitting panel, the heat dissipation base is a shell shape with a cavity, and the light-transmitting panel is located on the light-emitting side of the lens. In this case, the light-transmitting panel has a central hole in the middle to ensure that a through hole can be formed in the middle of the lamp body.

[0064] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A lighting device, characterized in that, include: A heat dissipation base, a light source module, and a lens are arranged in a sequentially stacked manner. The lighting device has a light-emitting side and a back side facing away from the light-emitting side. The light-emitting side is the side where the lens is provided, and the back side is the side where the heat dissipation base is provided. The lighting device has a through hole in the middle, and the two ends of the through hole pass through the light-emitting side and the back side of the lighting device, respectively, to form a channel for airflow in the middle of the lighting device.

2. The lighting device as claimed in claim 1, characterized in that, The back side of the heat dissipation base has a heat dissipation fin assembly, which includes multiple heat dissipation fins.

3. The lighting device as described in claim 2, characterized in that, The back side of the heat dissipation fin assembly is provided with a ventilation groove that intersects with the corresponding heat dissipation fin. The ventilation groove is formed by a notch on the back side of the corresponding heat dissipation fin of the heat dissipation fin assembly, and at least one extended portion of the ventilation groove intersects with the extended portion of the through hole.

4. The lighting device according to any one of claims 1-3, characterized in that, The lens is an integral structure, and both the lens and the heat sink base have a hole structure in the middle. At least one of the heat sink base and the lens has a protruding hole section that protrudes towards the other. A sealing ring is press-fitted between the protruding hole section and the other, so that the hole structure of the lens and the heat sink base constitutes at least part of the through hole. The light source module is arranged around the protruding hole section.

5. The lighting device as described in claim 4, characterized in that, The end face of the protruding hole section is provided with a sealing groove to accommodate the sealing ring.

6. The lighting device as described in claim 5, characterized in that, The lens has a mounting hole that extends through the protruding section, the mounting hole being used to insert a screw, the screw being used to fix the lens on the heat sink base.

7. The lighting device as claimed in claim 6, characterized in that, One of the sealing groove and the sealing ring has a protrusion on its side wall, and the other has a relief groove on its side wall to avoid the protrusion. The protrusion surrounds the screw, and the sealing ring is installed in the sealing groove by fitting the protrusion into the relief groove.

8. The lighting device as claimed in claim 4, characterized in that, The lens has a stepped aperture with a larger diameter at the light-emitting end.

9. The lighting device as claimed in claim 8, characterized in that, The stepped surface of the stepped hole has mounting holes for screws, which are used to fix the lens to the heat sink base.

10. The lighting device according to any one of claims 1-3, characterized in that, The through hole is a round hole, and the length of the through hole is between 55mm and 85mm.

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