Lighting device and lighting system

Abstract

The utility model provides a lighting device which comprises a lamp body and a light source assembly fixedly connected to the lamp body. The lamp body is of an arc-shaped structure and comprises a base table, a first surrounding edge and a second surrounding edge. The second surrounding edge is arranged on the inner side of the first surrounding edge and provided with a heat dissipation groove. The light source assembly comprises a substrate and light-emitting units arranged on the substrate, the light-emitting units surround to form a light-emitting area capable of adjusting light and color, the substrate is of an arc-shaped structure, the side edge of the substrate is connected with an insulation pad in a buckled mode, and the substrate is fixedly connected to the second surrounding edge; heat generated by the light-emitting unit is dissipated to the outside through the substrate and the heat dissipation groove. The lamp body and the substrate of the lighting device are provided with the arc-shaped structures and can be spliced according to requirements; heat generated by the light-emitting unit is dissipated to the outside through the substrate and the heat dissipation grooves, conduction heat dissipation and convection heat dissipation are achieved, the pressure difference between the inside and the outside of the lamp body is effectively balanced, and the service life of the whole lamp is prolonged. The utility model further provides a lighting system comprising the lighting device.

Description

Technical Field

[0001] This utility model belongs to the technical field of LED lighting fixtures, specifically relating to a lighting device and lighting system. Background Technology

[0002] LED lights are solid-state semiconductor devices that use light-emitting diodes (LEDs) as their light source, directly converting electrical energy into visible light. Depending on the requirements, LED lights can excite light-emitting chips of different wavelengths to emit light of different colors. Due to their advantages such as high brightness, low energy consumption, environmental friendliness, long lifespan, impact resistance, and stable performance, LED lights have been widely used in both indoor and outdoor lighting applications.

[0003] In existing LED lighting fixtures, the shape of the lamp body is predetermined at the factory, typically round, oval, rectangular, or square. Users cannot customize the design to achieve a specific lighting range. Furthermore, these LED fixtures often employ a single convection or conduction cooling structure to dissipate heat generated by the light source and power supply, resulting in limited heat dissipation and impacting the performance and lifespan of the light-emitting element. Regarding light emission performance, these LED fixtures are susceptible to light obstruction by mounting structures, leading to shadows in the emitted light and affecting light uniformity. Utility Model Content

[0004] To address the shortcomings of the prior art, this invention provides a lighting device in which both the lamp body and the substrate have arc-shaped structures, allowing for compatible installation and assembly as needed. Heat generated by the light-emitting unit is dissipated to the outside through the substrate and heat dissipation grooves, achieving both conductive and convective heat dissipation. This effectively balances the pressure difference between the inside and outside of the lamp body, improving the overall lifespan of the lamp. This invention also provides a lighting system incorporating this lighting device.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0006] In a first aspect, the present invention provides a lighting device, including a lamp body and a light source assembly fixedly connected to the lamp body;

[0007] The lamp body has an arc-shaped structure. The lamp body includes a base and a first perimeter and a second perimeter disposed on the base. The second perimeter is disposed inside the first perimeter and has a heat dissipation groove.

[0008] The light source assembly includes a substrate and light-emitting units disposed on the substrate. A plurality of light-emitting units surround to form a light-emitting area that can be dimmed and color-adjusted. The substrate has an arc-shaped structure and an insulating pad is provided on the side of the substrate. The substrate is fixedly connected to the second perimeter.

[0009] The heat generated by the light-emitting unit is dissipated to the outside through the substrate and the heat dissipation groove.

[0010] In some embodiments, the second perimeter and the base form an open cavity, the substrate is disposed on the cavity and covers the opening; a heat dissipation gap is provided between the second perimeter and the first perimeter, and the cavity, the heat dissipation groove and the heat dissipation gap form an airflow heat dissipation channel.

[0011] In some embodiments, the lamp body further includes a light-emitting part, the base has a base surface, the light-emitting part extends from the base surface along the light-emitting direction of the light-emitting unit, the light-emitting part has a light-emitting cavity, and the light-emitting cavity communicates with the chamber;

[0012] The projection of the light-emitting part onto the base surface covers the projection of the light-emitting area onto the base surface.

[0013] In some embodiments, the base is provided with a first support column and a second support column, the first support column and the second support column are located inside the second perimeter, and the height of the first support column is less than the height of the second support column;

[0014] The substrate includes a first mounting surface and a second mounting surface disposed opposite to each other. The light-emitting unit is disposed on the first mounting surface, and the second support column and the second perimeter respectively abut against the first mounting surface.

[0015] In some embodiments, the first support post is provided with a first mounting hole, the substrate is provided with a mounting groove, and a first through hole and a second through hole penetrating the first mounting surface and the second mounting surface. The mounting groove is opened on the side of the substrate, the insulating pad is provided with an insulating post, the insulating pad is fixedly connected to the mounting groove, and the insulating post is located inside the first through hole. The insulating post is provided with an insulating through hole, and the insulating through hole communicates with the first mounting hole.

[0016] In some embodiments, the lighting device further includes a fastening assembly, which includes a first fastener and a second fastener;

[0017] With the direction from the first mounting surface toward the second mounting surface as the first direction, along the first direction, the first fastener passes through the first mounting hole and the insulating through hole and is fixed to the mounting base.

[0018] In some embodiments, the insulating pad is disposed on the heat dissipation groove, and the insulating pad includes a first pad and a second pad, the first pad and the second pad being respectively attached to the first mounting surface and the second mounting surface; the thickness of the first pad is H1, the height of the first support column is L1, and the height of the second perimeter is H2, having the following relationship:

[0019] H1 + L1 = H2.

[0020] In some embodiments, the second support column is provided with a second mounting hole, and the outer side of the second support column is provided with reinforcing ribs;

[0021] With the direction of the second mounting surface toward the first mounting surface as the second direction, along the second direction, the second fastener passes through the second through hole and is fixedly connected to the second mounting hole.

[0022] In some embodiments, the lighting device further includes a power supply assembly, which includes a power supply body and a plastic housing enclosing the power supply body;

[0023] The substrate is provided with a third through hole, and the fastening assembly further includes a third fastener, which passes through the third through hole to fix the plastic housing to the substrate together.

[0024] In a second aspect, the present invention provides a lighting system, including a mounting base and the aforementioned lighting device, wherein the light-emitting units are arranged in an array on the substrate, and the light-emitting units include a first LED and a second LED that respectively present a first color temperature and a second color temperature;

[0025] The lighting devices are assembled together and fixed on the mounting base; multiple light-emitting areas are combined as needed for dimming and color adjustment.

[0026] In summary, this utility model has at least the following advantages:

[0027] 1. The lighting device provided by this utility model has a light source component installed in a cavity formed by the second perimeter and the boss; a base plate with an arc-shaped structure covers the opening of the cavity and is fixedly connected to a shell with the same arc-shaped structure, so that the lighting device is arc-shaped as a whole and can be flexibly spliced ​​as needed; the heat generated by the light-emitting unit of the light source component is dissipated to the outside through the base plate and heat sink, realizing conduction heat dissipation and convection heat dissipation, which can effectively balance the pressure difference between the inside and outside of the lamp body and improve the service life of the whole lamp.

[0028] 2. The lighting device provided by this utility model has light generated by the light-emitting area on the substrate, which is emitted to the outside through the light-emitting cavity set in the lamp body, thereby accurately controlling the light and achieving uniform light emission; this structure, combined with the dimming and color-adjusting function of the light-emitting unit, can meet the lighting needs of multiple places.

[0029] 3. The lighting system provided by this utility model adopts an overall arc-shaped lighting device, which can be flexibly spliced ​​and assembled as needed to construct different lighting areas. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the lighting device according to Embodiment 1 of this utility model.

[0031] Figure 2 This is a partial exploded view of the lighting device according to Embodiment 1 of this utility model.

[0032] Figure 3 This is a top view of the lighting device according to Embodiment 1 of this utility model.

[0033] Figure 4 This is a schematic diagram of the lamp body of Embodiment 1 of this utility model.

[0034] Figure 5 This is a schematic diagram of the light source assembly of Embodiment 1 of this utility model.

[0035] Figure 6 This is a schematic diagram of the heat dissipation of the lighting device in Embodiment 1 of this utility model.

[0036] Figure 7 This is a partial exploded view of the lighting device of Embodiment 2 of this utility model.

[0037] Figure 8 This is a schematic diagram of the structure of the light source assembly with an insulating pad installed in Embodiment 2 of this utility model.

[0038] Figure 9 This is an exploded view of the lighting system of Embodiment 3 of this utility model.

[0039] Figure 10 This is one of the splicing diagrams of the lighting system in Embodiment 3 of this utility model.

[0040] Figure 11 This is the second schematic diagram of the assembly of the lighting system in Embodiment 3 of this utility model.

[0041] Figure 12 This is the third schematic diagram of the splicing of the lighting system in Embodiment 3 of this utility model.

[0042] Figure 13 This is the fourth schematic diagram of the assembly of the lighting system in Embodiment 3 of this utility model.

[0043] Figure 14 This is the fifth schematic diagram of the assembly of the lighting system in Embodiment 3 of this utility model.

[0044] Marked in the image:

[0045] 100 - Lighting fixture, mounting base - 200;

[0046] 1-Lamp body, 10-Base, 11-First perimeter, 12-Second perimeter, 13-Light-emitting part, 14-First support column, 15-Second support column;

[0047] 101-Base surface, 111-First arc-shaped edge, 112-Second arc-shaped edge, 113-Side edge, 121-Heat dissipation groove, 122-Cavity, 123-Opening, 124-Heat dissipation gap, 130-Light emission cavity, 131-Light emission surface, 141-First mounting hole, 151-Second mounting hole, 152-Reinforcing rib;

[0048] 2-Light source assembly, 21-Substrate, 22-Light emission unit;

[0049] 201-First mounting surface, 202-Second mounting surface, 210-Mounting groove, 211-First through hole, 212-Second through hole, 213-Third through hole, 220-Light-emitting area, 221-First LED bead, 222-Second LED bead;

[0050] 3-Insulating pad, 30-Insulating post, 301-Insulating through hole, 31-First gasket, 32-Second gasket, 321-Third mounting hole;

[0051] 4-Fastening assembly, 41-First fastener, 42-Second fastener, 43-Third fastener;

[0052] 5-Power supply assembly, 51-Power supply body, 52-Plastic housing;

[0053] A1 - First ring, A2 - Second ring, L1 - First direction, L2 - Second direction; Detailed Implementation

[0054] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0055] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0058] Example 1

[0059] refer to Figures 2-6 This embodiment provides a lighting device 100, including a lamp body 1 and a light source assembly 2. The lamp body 1 serves as the main frame of the lighting device 100 and is used to mount the light source assembly 2.

[0060] The lamp body 1 includes a base 10, a first perimeter 11, and a second perimeter 12, which are disposed on the base 10. In this embodiment, the lamp body 1 is an injection-molded plastic part. Specifically, the base 10, the first perimeter 11, and the second perimeter 12 are integrally injection-molded. The first perimeter 11 protrudes from the outer edge of the base 10, and the second perimeter 12 is located inside the first perimeter 11. The second perimeter 12 is provided with a heat dissipation groove 121. Specifically, the heat dissipation groove 121 is formed at the upper edge of the second perimeter 12.

[0061] The first perimeter 11 surrounds and forms the overall shape of the lamp body 1 and the lighting device 100. For example... Figure 3As shown, the first perimeter 11 includes a first arc-shaped edge 111, a second arc-shaped edge 112, and a side edge 113 disposed on the first arc-shaped edge 111 and the second arc-shaped edge 112. The first arc-shaped edge 111 and the second arc-shaped edge 112 belong to a segment of the arc length of the first ring A1 and the second ring A2, respectively. The first ring A1 and the second ring A2 are concentric circles, and the first ring A1 is located on the outer periphery of the second ring A2. The length of the first arc-shaped edge 111 is greater than the length of the second arc-shaped edge 112. The length of the side edge 113 is the difference between the radius of the first ring A1 and the radius of the second ring A2. Along the radial direction of the first ring A1 or the second ring A2, the cross-section of the lamp body 1 is approximately an inverted convex structure.

[0062] The light source assembly 2 includes a substrate 21 and light-emitting units 22. The substrate 21 can be an aluminum substrate or a ceramic substrate. The light-emitting units 22 are fixedly connected to one side of the substrate 21, for example, by soldering them onto the substrate 21 using SMD surface mount technology or COB packaging. In this embodiment, the substrate 21 is an aluminum substrate, and the light-emitting units 22 are LED beads using SMD surface mount technology. Multiple light-emitting units 22 surround to form a light-emitting area 220, which can be continuously dimmed and color-tuned for various light colors and color temperatures.

[0063] Adapted to the first perimeter 11, the substrate 21 also has an arc-shaped structure. In this way, the lamp body 1 and the lighting device 100 as a whole have an arc-shaped structure. Based on this unique arc-shaped structure, the lighting device 100 can be spliced ​​as needed.

[0064] An insulating pad 3 is provided on the side of the substrate 21 to cover the through holes on the substrate 21, thus separating it from other components such as the metal base. This prevents damage to the lamp panel even if the mounting surface of the lamp panel comes into contact with a metal component. It also prevents abnormal substrates from conducting through the through holes to the base and damaging other electronic components. The substrate 21 is fixed to the second perimeter 12. The top surface of the second perimeter 12 forms a support surface, on which the substrate 21 is laid flat and secured with fasteners.

[0065] Furthermore, the second perimeter 12 and the base 10 surround to form a cavity 122, the cavity 122 having an opening 123. The second perimeter 12 is located inside the first perimeter 11, and the height of the second perimeter 12 is less than the height of the first perimeter 11. When the substrate 21 is mounted on the support surface of the second perimeter 12, the substrate 21 is also located on the cavity 122, and the substrate 21 covers the opening 123. A heat dissipation gap 124 is provided between the second perimeter 12 and the first perimeter 11 in the lamp body 1. The cavity 122, the heat dissipation groove 121, and the heat dissipation gap 124 form an airflow heat dissipation channel, through which part of the heat generated by the light-emitting unit 22 is dissipated to the outside.

[0066] like Figure 6As shown, during the operation of the lighting device 100, the light-emitting unit 22 is powered on to emit light, which is emitted to the outside through the light-emitting cavity 130. During operation, the heat generated by the light-emitting unit 22 is dissipated to the outside through the substrate 21 and the heat dissipation groove 121. On one hand, heat is conducted from the first mounting surface 201 of the substrate 21 to the second mounting surface 202 and dissipated to the outside via thermal transfer; on the other hand, airflow rises from the light-emitting cavity 130 and the cavity 122 through convection cooling and is dissipated to the outside via the heat dissipation groove 121 and the heat dissipation gap 124. In this embodiment, the lighting device 100, by providing the heat dissipation groove 121 and the heat dissipation gap 124, can balance the pressure difference inside the lamp body 1, thereby improving the service life of the light source assembly and the overall lighting device.

[0067] In terms of the light-emitting structure, the lamp body 1 is also provided with a light-emitting part 13, and the base 10 is provided with a base surface 101. The light-emitting part 13 extends from the base surface 101 along the light-emitting direction of the light-emitting unit 22, and the light-emitting part 13 is provided with a light-emitting cavity 130, which is connected to the chamber 122.

[0068] The projection of the light-emitting portion 13 onto the base surface 101 covers the projection of the light-emitting region 220 onto the base surface. It is understood that the projection of the light-emitting region 220 onto the base surface is covered by the projection of the light-emitting portion 13 onto the base surface 101, and the light generated by the light-emitting region 220 enters the light-emitting cavity 130 and exits to the outside through the light-emitting surface 131. In some embodiments, all the light generated by the light-emitting region 220 passes through the light-emitting surface 131 and exits to the outside.

[0069] The base 10 is provided with a first support column 14 and a second support column 15. Both the first support column 14 and the second support column 15 are located inside the second perimeter 12, and the height of the first support column 14 is less than the height of the second support column 15.

[0070] The substrate 21 includes a first mounting surface 201 and a second mounting surface 202 disposed opposite to each other. The light-emitting unit 22 is disposed on the first mounting surface 201. The second support post 15 and the second perimeter 12 respectively abut against the first mounting surface 201. The second support post 15 is flush with the support surface of the second perimeter 12, that is, the height of the second support post 15 is equal to the height of the second perimeter 12. The substrate 21 is placed on the second perimeter 12 and the second support post 15, and covers the opening 123 of the cavity 122.

[0071] The first support post 14, together with the insulating pad 3, also supports the substrate 21. In some embodiments, the first support post 14 is adjacent to the heat sink 121. The first support post 14 has a first mounting hole 141, and the substrate 21 has a mounting groove 210, a first through hole 211, and a second through hole 212. The first through hole 211 and the second through hole 212 penetrate the first mounting surface 201 and the second mounting surface 202.

[0072] The mounting groove 210 is formed on the side of the substrate 21. The insulating pad 3 is provided with an insulating post 30, and the insulating post 30 has an insulating through hole 301. Furthermore, the insulating pad 3 is fixedly connected to the mounting groove 210, and the insulating post 30 passes through the inner side of the first through hole 211. At this time, the insulating through hole 301 is connected to the first mounting hole 141.

[0073] Since the lighting device in this embodiment needs to be installed on an external mounting base via a metal mounting base, to ensure insulation protection, the insulating pad 3 is installed in the mounting groove 210 with the second mounting surface of the substrate facing the mounting base and in contact with the connecting post of the mounting base. At this time, the insulating post 30 of the insulating pad 3 passes through the first through hole 211 opened in the substrate 21, so that the insulating through hole 301 is located inside the first through hole 211. The first mounting hole 141 opened in the first support post 14 is a reserved hole. During installation and fixing, the fastener passes through the first mounting hole 141 and the insulating through hole 301 and is then fixed on the mounting base.

[0074] The fastening assembly 4 includes a first fastener 41 and a second fastener 42, both of which are metal screws. The direction from the first mounting surface 201 to the second mounting surface 202 is defined as the first direction L1. The first direction L1 is opposite to the light emission direction of the light-emitting unit 22. When the lamp body is mounted to the mounting base, the first fastener 41 passes through the first mounting hole 141 and the insulating through hole 301 along the first direction L1 and is fixed to the mounting base.

[0075] The insulating pad 3 installed in the mounting groove 210 includes a first pad 31 and a second pad 32, which are respectively attached to the first mounting surface 201 and the second mounting surface 202 of the substrate 21. The thickness of the first pad 31 is H1, the height of the first support post 14 is L1, and the height of the second perimeter 12 is H2, with the following relationship: H1 + L1 = H2. That is, the first support post 14, together with the first pad 31, also supports the substrate 21.

[0076] The insulating pad 3 is detachably enclosing the mounting groove 210 mounted on the side of the substrate 21. The insulating post 30 of the first pad 31 passes through the first through hole 211 and is partially or completely engaged with the third mounting hole 321 opened in the second pad 32. That is, the top part or all of the insulating post 30 is located in the third mounting hole 321, but does not protrude from the third mounting hole 321.

[0077] Because the first through-hole 211 is surrounded and separated on the inside by the insulating post 30, the aluminum substrate (PCB board or circuit board) will not be damaged even if the first through-hole 211 is located at the edge of the first mounting surface 201 and the second mounting surface 202, and the sidewall adjacent to the first through-hole 211 comes into contact with metal parts. In addition, in the event of an abnormality in the aluminum substrate, it will not conduct electricity and damage other components.

[0078] Furthermore, the second support column 15 has a second mounting hole 151, and a reinforcing rib 152 is provided on the outer side of the second support column 15. Combined with... Figure 2 and Figure 4 The direction from the second mounting surface 202 toward the first mounting surface 201 is defined as the second direction L2, which is the same as the light emission direction of the light-emitting unit 22. Along the second direction L2, the second fastener 42 passes through the second through hole 212 and is fixedly connected to the second mounting hole 151.

[0079] The lighting device provided in this embodiment has an arc-shaped substrate covering the opening of the cavity and is fixedly connected to a shell with the same arc-shaped structure, making the lighting device as a whole arc-shaped, which can be flexibly spliced ​​as needed. The light source assembly is installed in the cavity formed by the second surrounding edge and the boss. The heat generated by the light-emitting unit of the light source assembly is dissipated to the outside through the substrate and heat dissipation grooves, realizing conduction heat dissipation and convection heat dissipation, which can effectively balance the pressure difference between the inside and outside of the lamp body and improve the service life of the entire lamp. Moreover, the light generated by the light-emitting area located on the substrate is emitted to the outside through the light-emitting cavity set in the lamp body, thereby precisely controlling the light and achieving uniform light output. At the same time, combined with the dimming and color-adjusting functions of the light-emitting unit, it can meet the lighting needs of multiple places.

[0080] Example 2

[0081] exist Figures 1-6 Based on, refer to Figure 7 and Figure 8 In the lighting device of this embodiment, a power supply assembly 5 is also included. The power supply assembly 5 includes a power supply body 51 and a plastic housing 52, and the plastic housing 52 encloses the power supply body 51.

[0082] The power supply assembly 5 is mounted on the second mounting surface 202. Correspondingly, the substrate 21 has a third through hole 213, and the fastening assembly 4 includes a third fastener 43, which passes through the third through hole 213 to fix the plastic housing 52 to the substrate 21. In this embodiment, the third fastener 43 is a rivet, which is a single-sided riveting rivet, and can stably mount the power supply assembly 5 on the second mounting surface 202, preventing loosening during vibration.

[0083] Example 3

[0084] exist Figures 1-8 Based on reference Figures 9-14 This embodiment provides a lighting system, including a mounting base 200 and a lighting device 100 as described in Embodiment 1 or Embodiment 2. The mounting base 200 is a metal part, which is fitted and fixed to an external mounting base. A first fastener passes through a first mounting hole and an insulating through hole to fix the lamp body to the mounting base.

[0085] It should be noted that the light-emitting units 22 are arranged in an array on the substrate 21. Each light-emitting unit 21 includes a first LED 211 and a second LED 212 that respectively present a first color temperature and a second color temperature. The first color temperature and the second color temperature are cool color temperature and warm color temperature, respectively. The first LED 211 and the second LED 212 of the light-emitting unit 22 are controlled by a four-wire dual-loop system to avoid the lighting device failing to light up in the event of an open circuit fault.

[0086] In some embodiments, the lighting devices are assembled together and fixed to the mounting base 200. The light-emitting areas corresponding to the lighting devices 100 are combined and dimmed and color-adjusted as needed.

[0087] The lighting system provided in this embodiment adopts an overall arc-shaped lighting device, which can be flexibly spliced ​​and assembled as needed to construct different lighting areas.

[0088] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A lighting device, characterized in that, Includes a lamp body and a light source assembly fixedly connected to the lamp body; The lamp body has an arc-shaped structure, including a base and a first and a second perimeter disposed on the base. The second perimeter is disposed inside the first perimeter and has a heat dissipation groove. The light source assembly includes a substrate and light-emitting units disposed on the substrate. A plurality of light-emitting units surround to form a light-emitting area that can be dimmed and color-adjusted. The substrate has an arc-shaped structure and an insulating pad is provided on the side of the substrate. The substrate is fixedly connected to the second perimeter. The heat generated by the light-emitting unit is dissipated to the outside through the substrate and the heat dissipation groove.

2. The lighting device according to claim 1, characterized in that, The second perimeter and the base form an open cavity, the substrate is disposed on the cavity and covers the opening; a heat dissipation gap is provided between the second perimeter and the first perimeter, and the cavity, the heat dissipation groove and the heat dissipation gap form an airflow heat dissipation channel.

3. The lighting device according to claim 2, characterized in that, The lamp body also includes a light-emitting part, the base is provided with a base surface, the light-emitting part extends from the base surface along the light-emitting direction of the light-emitting unit, the light-emitting part is provided with a light-emitting cavity, and the light-emitting cavity is connected to the chamber; The projection of the light-emitting part onto the base surface covers the projection of the light-emitting area onto the base surface.

4. The lighting device according to claim 1, characterized in that, The base is provided with a first support column and a second support column, the first support column and the second support column are located inside the second perimeter, and the height of the first support column is less than the height of the second support column; The substrate includes a first mounting surface and a second mounting surface disposed opposite to each other. The light-emitting unit is disposed on the first mounting surface, and the second support column and the second perimeter respectively abut against the first mounting surface.

5. The lighting device according to claim 4, characterized in that, The first support column is provided with a first mounting hole, the substrate is provided with a mounting groove, and a first through hole and a second through hole that pass through the first mounting surface and the second mounting surface. The mounting groove is opened on the side of the substrate. The insulating pad is provided with an insulating column. The insulating pad is fixedly connected to the mounting groove, and the insulating column is located inside the first through hole. The insulating column is provided with an insulating through hole that communicates with the first mounting hole.

6. The lighting device according to claim 5, characterized in that, The lighting device also includes a fastening assembly, which includes a first fastener and a second fastener. With the direction from the first mounting surface toward the second mounting surface as the first direction, along the first direction, the first fastener passes through the first mounting hole and the insulating through hole and is fixed to the mounting base.

7. The lighting device according to claim 6, characterized in that, The insulating pad is disposed on the heat dissipation groove. The insulating pad includes a first pad and a second pad, which are respectively attached to the first mounting surface and the second mounting surface. The thickness of the first pad is H1, the height of the first support column is L1, and the height of the second perimeter is H2, with the following relationship: H1 + L1 = H2.

8. The lighting device according to claim 7, characterized in that, The second support column is provided with a second mounting hole, and the outer side of the second support column is provided with reinforcing ribs; With the direction of the second mounting surface toward the first mounting surface as the second direction, along the second direction, the second fastener passes through the second through hole and is fixedly connected to the second mounting hole.

9. The lighting device according to claim 6, characterized in that, The lighting device also includes a power supply assembly, which includes a power supply body and a plastic housing enclosing the power supply body; The substrate is provided with a third through hole, and the fastening assembly further includes a third fastener, which passes through the third through hole to fix the plastic housing to the substrate together.

10. A lighting system, characterized in that, The device includes a mounting base and the lighting device according to any one of claims 1-9, wherein the light-emitting units are arranged in an array on the substrate, and the light-emitting units include a first LED and a second LED that respectively present a first color temperature and a second color temperature; The lighting devices are assembled together and fixed on the mounting base; multiple light-emitting areas are combined as needed for dimming and color adjustment.

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