Ring light source

Abstract

This utility model discloses a ring light source, relating to the field of detection light source technology. The ring light source includes a heat sink, a light source component, a perimeter, and a diffuser plate; the top of the heat sink has an annular placement surface; the light source component includes a heat dissipation pad, a circuit board, and light-emitting components; a first light-emitting component and multiple second light-emitting components are arranged sequentially at intervals along a horizontal direction away from the vertical axis, with the first light-emitting component located on the side of the multiple second light-emitting components closer to the vertical axis; the distance between the first light-emitting component and its adjacent second light-emitting component is greater than the distance between any two adjacent second light-emitting components; along the horizontal direction away from the vertical axis, the number of light-emitting elements in the second light-emitting components gradually increases. The light emitted by this light source component from the central region to the edge region has good overall uniformity, ensuring the illumination effect of the ring light source.

Description

Technical Field

[0001] This utility model relates to the field of detection light source technology, and in particular to a ring light source. Background Technology

[0002] In the field of machine vision, the inspection of product appearance usually requires the use of light sources for illumination. Among them, ring light sources are widely used in the inspection field. However, since the light-emitting structure inside the ring light source usually uses LEDs as light-emitting units, when increasing the number of LEDs, in order to maintain the voltage of the light-emitting structure, the current flowing through each LED needs to be reduced. This can easily lead to severe brightness attenuation in the edge areas of the light-emitting structure, resulting in the light emitted by the light-emitting structure being brighter in the center and darker at the edges. This results in poor overall uniformity of the light emitted by the light-emitting structure, making it difficult to guarantee the illumination effect. Furthermore, the densely arranged LEDs will generate lateral thermal coupling on the substrate, often resulting in the temperature in the central area of ​​the light-emitting structure being too high compared to the edge areas, affecting the normal operation of the light-emitting structure. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a ring light source with better heat dissipation and better uniformity of emitted light.

[0004] To achieve the above objectives, this utility model provides a ring light source, which includes a heat sink, a light source component, a perimeter, and a diffuser plate. The heat sink is ring-shaped and arranged around a vertical axis. The top of the heat sink has an annular placement surface. A first annular boss is provided on the side of the annular placement surface near the vertical axis. The light source component includes a heat dissipation pad, a circuit board, and a light-emitting component. The heat dissipation pad is ring-shaped and arranged around the vertical axis. The heat dissipation pad is disposed on the annular placement surface, and the inner side of the heat dissipation pad abuts against the first annular boss. The top of the heat dissipation pad has an annular heat dissipation surface. The circuit board is ring-shaped and arranged around the vertical axis. The circuit board is disposed on the annular heat dissipation surface. The top of the circuit board has an annular mounting surface. The light-emitting component consists of multiple light-emitting elements, which are arranged annularly at intervals along the direction surrounding the vertical axis on the annular mounting surface. Multiple light-emitting components are provided, which are respectively a first light-emitting component and multiple second light-emitting components. The system comprises: a first light-emitting component and a plurality of second light-emitting components arranged sequentially at intervals along a horizontal direction away from the vertical axis, with the first light-emitting component located on the side of the plurality of second light-emitting components closer to the vertical axis; the distance between the first light-emitting component and an adjacent second light-emitting component is greater than the distance between any two adjacent second light-emitting components; the number of light-emitting elements in the second light-emitting components gradually increases along the horizontal direction away from the vertical axis; the number of light-emitting elements in each of the first light-emitting components is less than the number of light-emitting elements in any of the second light-emitting components; a circumference, which is annular and arranged around the vertical axis; the lower inner part of the circumference abuts against the outer side of the heat sink, and the upper inner part of the circumference is provided with an annular protrusion that abuts against the annular mounting surface; a diffuser plate, which is annular and arranged around the vertical axis; the diffuser plate is connected to the top of the circumference; and the diffuser plate is located above the light-emitting components.

[0005] Furthermore, the distance between any two adjacent second light-emitting components is equal.

[0006] Furthermore, the diffuser plate is at least partially located above the first annular protrusion, with the top end of the first annular protrusion spaced apart from the bottom end of the diffuser plate to define an opening, the opening being opposite to the first light-emitting component.

[0007] Furthermore, in the horizontal direction, the top of the first annular boss is higher than the top of the heat dissipation pad.

[0008] Furthermore, the light-emitting element includes a mounting base and a light-emitting body; the light-emitting body is connected to the circuit board, the mounting base is disposed around the bottom of the light-emitting body and abuts against the annular mounting surface; the top of the first annular boss is lower than the top of the light-emitting body.

[0009] Furthermore, the inner side of the circuit board abuts against the outer side of the first annular boss.

[0010] Furthermore, the second light-emitting component is provided in four parts.

[0011] Furthermore, a second annular protrusion is provided on the lower outer side of the heat sink, and the top of the second annular protrusion abuts against the bottom of the perimeter.

[0012] Furthermore, an annular groove is provided on the upper outer side of the periphery, and the annular groove is provided around the outer periphery of the periphery; multiple annular grooves are provided and are arranged at intervals along the vertical direction.

[0013] Furthermore, it also includes a first connector and a second connector; the first connector is detachably connected to the diffuser plate and the periphery, and the second connector is detachably connected to the periphery and the heat sink.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The heat dissipation pad is placed on the annular placement surface of the heat sink, so that the heat dissipation pad can abut against the heat sink. The circuit board is placed on the annular heat dissipation surface of the heat dissipation pad, so that the circuit board can abut against the heat dissipation pad. The light-emitting components of multiple light-emitting components are all placed on the annular mounting surface of the circuit board, so that the heat emitted by the light-emitting components during operation can be transferred to the circuit board, and then transferred to the heat sink through the heat dissipation pad to reduce the temperature of the light-emitting components. By setting the annular protrusion to abut against the annular mounting surface, the position of the circuit board and the heat dissipation pad can be defined by the annular protrusion and the heat sink, so that the heat dissipation pad can abut against the heat sink better, ensuring the heat transfer effect. In addition, the inner side of the heat dissipation pad abuts against the outer side of the first annular protrusion of the heat sink, so as to increase the contact area between the inner side of the heat dissipation pad and the heat sink, further improving the heat dissipation effect of the inner side of the heat dissipation pad near the vertical axis, thereby better dissipating heat from the middle of the light source component, avoiding the excessive temperature in the middle of the annular light source, and ensuring its normal operation.

[0015] 2. The first light-emitting component is located on one side of the plurality of second light-emitting components near the vertical axis. The first light-emitting component is the light source structure in the central region of the light source component. The distance between the first light-emitting component and an adjacent second light-emitting component is greater than the distance between any two adjacent second light-emitting components. This allows control over the distance between the first light-emitting component and other second light-emitting components, thereby controlling the brightness of the light in the central region of the light source component. This reduces the degree to which the light emitted by the light source component is brighter in the center and darker at the edges. The number of light-emitting elements in the first light-emitting component is less than the number of light-emitting elements in any second light-emitting component. This prevents the light in the central region of the light source component from being too bright. Furthermore, along the horizontal direction away from the vertical axis, the number of light-emitting elements in the second light-emitting components gradually increases. This ensures the brightness of the light emitted from the edge region of the light source component and achieves good overall uniformity of the light emitted from the central region to the edge region, thus ensuring the illumination effect of the ring light source. Attached Figure Description

[0016] To more clearly illustrate the technology in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the ring light source of this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the ring light source of this utility model from another perspective;

[0019] Figure 3 This is a cross-sectional view of the ring light source of this utility model;

[0020] Figure 4 This is a schematic diagram of the heat sink for the ring light source of this utility model;

[0021] Figure 5 This is a schematic diagram of the periphery of the ring light source of this utility model;

[0022] Figure 6 This is an exploded view of the heat dissipation pad and circuit board of the ring light source of this utility model.

[0023] Reference numerals: Heat sink 100; Opening 101; Annular placement surface 110; First annular boss 111; Second annular boss 112; Light source component 200; Heat dissipation pad 210; Annular heat dissipation surface 211; Circuit board 220; Annular mounting surface 221; Light-emitting element 231; Mounting base 232; Light-emitting body 233; First light-emitting component 240; Second light-emitting component 250; Peripheral 300; Annular protrusion 310; Annular groove 320; Diffuser plate 400. Detailed Implementation

[0024] The technology of this embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is one embodiment of the present invention, and not all embodiments thereof. Based on this embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0027] Please see Figures 1 to 6An embodiment of this utility model provides a ring light source, which includes a heat sink 100, a light source component 200, a perimeter 300, and a diffuser plate 400. The heat sink 100 is ring-shaped and arranged around a vertical axis. The top of the heat sink 100 has an annular placement surface 110. A first annular boss 111 is provided on the side of the annular placement surface 110 near the vertical axis. The light source component 200 includes a heat dissipation pad 210, a circuit board 220, and a light-emitting component. The heat dissipation pad 210 is ring-shaped and arranged around a vertical axis. The heat dissipation pad 210 is disposed on the annular surface. The heat dissipation pad 210 is placed on the surface 110, and the inner side of the heat dissipation pad 210 abuts against the first annular boss 111; the top of the heat dissipation pad 210 has an annular heat dissipation surface 211; the circuit board 220 is annular and arranged around the vertical axis; the circuit board 220 is disposed on the annular heat dissipation surface 211; the top of the circuit board 220 has an annular mounting surface 221; the light-emitting component is composed of multiple light-emitting elements 231, which are arranged annularly at intervals along the direction around the vertical axis on the annular mounting surface 221; multiple light-emitting components are provided, and each is a first light-emitting component 211. 40 and multiple second light-emitting components 250; a first light-emitting component 240 and multiple second light-emitting components 250 are arranged sequentially at intervals along a horizontal direction away from the vertical axis, and the first light-emitting component 240 is located on the side of the multiple second light-emitting components 250 closer to the vertical axis; the distance between the first light-emitting component 240 and an adjacent second light-emitting component 250 is greater than the distance between any two adjacent second light-emitting components 250; along the horizontal direction away from the vertical axis, the number of light-emitting elements 231 of each second light-emitting component 250 is... The number of light-emitting elements 231 in the first light-emitting component 240 is less than the number of light-emitting elements 231 in any second light-emitting component 250. The circumference 300 is annular and arranged around a vertical axis. The lower inner part of the circumference 300 abuts against the outer side of the heat sink 100, and the upper inner part of the circumference 300 is provided with an annular protrusion 310, which abuts against the annular mounting surface 221. The diffuser plate 400 is annular and arranged around a vertical axis. The diffuser plate 400 is connected to the top of the circumference 300. The diffuser plate 400 is located above the light-emitting components.

[0028] A heat dissipation pad 210 is disposed on the annular placement surface 110 of the heat sink 100, allowing the heat dissipation pad 210 to abut against the heat sink 100. A circuit board 220 is disposed on the annular heat dissipation surface 211 of the heat dissipation pad 210, allowing the circuit board 220 to abut against the heat dissipation pad 210. The light-emitting elements 231 of multiple light-emitting components are disposed on the annular mounting surface 221 of the circuit board 220, allowing the heat generated by the light-emitting components during operation to be transferred to the circuit board 220, and then through the heat dissipation pad 210 to the heat sink 100, thereby reducing the temperature of the light-emitting components. Annular protrusions 310 abut against the annular mounting surface 221 to further reduce the temperature of the light-emitting components. The annular protrusion 310 and the heat sink 100 can define the positions of the circuit board 220 and the heat sink 210, allowing the heat sink 210 to abut against the heat sink 100 effectively, ensuring heat transfer. Furthermore, the inner side of the heat sink 210 abuts against the outer side of the first annular protrusion 111 of the heat sink 100, increasing the contact area between the inner side of the heat sink 210 and the heat sink 100. This further improves the heat dissipation effect of the inner side of the heat sink 210 near the vertical axis, thereby effectively dissipating heat from the center of the light source component 200, preventing excessively high temperatures in the center of the annular light source, and ensuring its normal operation.

[0029] The first light-emitting component 240 is located on one side of the plurality of second light-emitting components 250 near the vertical axis. The first light-emitting component 240 is the light source structure in the central region of the light source component 200. The distance between the first light-emitting component 240 and an adjacent second light-emitting component 250 is greater than the distance between any two adjacent second light-emitting components 250. This allows control over the distance between the first light-emitting component 240 and other second light-emitting components 250, thereby controlling the brightness of the light in the central region of the light source component. This reduces the brightness of the light emitted by the light source component 200, which is brighter in the center and less bright at the edges. The light intensity is relatively low, and the number of light-emitting elements 231 in the first light-emitting component 240 is less than the number of light-emitting elements 231 in any second light-emitting component 250, so as to avoid the situation that the light in the central area of ​​the light source component is too bright. Furthermore, along the horizontal direction away from the vertical axis, the number of light-emitting elements 231 in the second light-emitting component 250 gradually increases, so as to ensure the brightness of the light emitted from the edge area of ​​the light source component 200, and to achieve good overall uniformity of the light emitted from the center area to the edge area of ​​the light source component 200, thus ensuring the lighting effect of the ring light source.

[0030] In some embodiments of this utility model, the distance between any two adjacent second light-emitting components 250 is equal, so as to further improve the uniformity of the light emitted by the light source component 200 at its edge.

[0031] Reference Figures 1 to 3In some embodiments of this utility model, the diffuser plate 400 is at least partially located above the first annular boss 111. The top end of the first annular boss 111 is spaced apart from the bottom end of the diffuser plate 400 to define an opening 101. The first light-emitting component 240 is disposed opposite to the opening 101.

[0032] The light emitted by the light-emitting element 231 can be emitted outward through the diffuser plate 400. An opening 101 is formed at the top of the first annular protrusion 111 and at the inner edge of the diffuser plate 400, so that the light can be emitted outward from the opening 101, thereby ensuring the brightness of the light source element 200 in the central area.

[0033] Reference Figure 3 In some embodiments of this utility model, in the horizontal direction, the top of the first annular protrusion 111 is higher than the top of the heat dissipation pad 210, so that the position of the heat dissipation pad 210 can be defined by the first annular protrusion 111, which can protect the heat dissipation pad 210 from damage from materials, and can make the first annular protrusion 111 fully abut against the inner sidewall of the heat dissipation pad 210, ensuring the heat transfer rate of the heat dissipation pad 210 to the heat dissipation base 100, thereby ensuring the heat dissipation effect.

[0034] Reference Figure 3 In some embodiments of this utility model, the light-emitting element 231 includes a mounting base 232 and a light-emitting body 233; the light-emitting body 233 is connected to the circuit board 220, the mounting base 232 is arranged around the bottom of the light-emitting body 233 and abuts against the annular mounting surface 221; wherein, the light-emitting body 233 is electrically connected to the circuit board 220 and is capable of emitting light; the top of the first annular protrusion 111 is lower than the top of the light-emitting body 233 so as to avoid the first annular protrusion 111 blocking the light emitted by the light-emitting element 231 and ensuring the illumination effect of the light-emitting element 231.

[0035] Specifically, the mounting bases 232 of two adjacent light-emitting elements 231 are spaced apart to avoid short circuits.

[0036] Reference Figure 3 In some embodiments of this utility model, the inner side of the circuit board 220 abuts against the outer side of the first annular protrusion 111, so that the circuit board 220 can transfer heat to the heat sink 100, thereby improving the cooling efficiency of the light source component 200 and ensuring the stability of the operation of the light source component 200.

[0037] In some embodiments of this utility model, four second light-emitting components 250 are provided.

[0038] The four second light-emitting components 250 are arranged sequentially at intervals along a horizontal direction away from the vertical axis to ensure the uniformity of the light emitted by the light source component 200 from the edge region to the center region.

[0039] Reference Figures 3 to 5 In some embodiments of this utility model, a second annular protrusion 112 is provided on the lower outer side of the heat sink 100, and the top of the second annular protrusion 112 abuts against the bottom of the circumference 300.

[0040] The inner side of the circumference 300 abuts against the outer side of the heat sink 100, and the bottom of the circumference 300 abuts against the second annular protrusion 112, so as to reduce the gap between the circumference 300 and the heat sink 100, and prevent external substances from entering the interior of the annular light source from between the circumference 300 and the heat sink 100, thereby protecting the light source component 200.

[0041] Reference Figure 1 and Figure 5 In some embodiments of this utility model, an annular groove 320 is provided on the upper outer side of the periphery 300, and the annular groove 320 is provided around the outer periphery of the periphery 300; multiple annular grooves 320 are provided and are arranged at intervals along the vertical direction.

[0042] By setting the annular groove 320, the area of ​​the periphery 300 that can contact the outside can be increased, thereby improving the heat dissipation effect of the periphery 300 and preventing the heat emitted by the light source component 200 during operation from accumulating on the periphery 300.

[0043] In some embodiments of this utility model, a first connector and a second connector are also included; the first connector is detachably connected to the diffuser plate 400 and the periphery 300, and the second connector is detachably connected to the periphery 300 and the heat sink 100, so as to improve the stability of the overall structure of the ring light source.

[0044] Specifically, both the first connector and the second connector can be threaded connection structures, with threaded holes provided on the circumference 300, the heat sink 100, and the diffuser plate 400, so that the first connector can connect the diffuser plate 400 and the circumference 300, and the second connector can connect the circumference 300 and the heat sink 100.

[0045] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A ring-shaped light source, characterized in that, include: The heat sink (100) is annular and arranged around a vertical axis; the top of the heat sink (100) has an annular placement surface (110); a first annular boss (111) is provided on the side of the annular placement surface (110) near the vertical axis. The light source component (200) includes a heat dissipation pad (210), a circuit board (220), and a light-emitting component; the heat dissipation pad (210) is annular and arranged around the vertical axis; the heat dissipation pad (210) is disposed on the annular placement surface (110), and the inner side of the heat dissipation pad (210) abuts against the first annular boss (111); the top of the heat dissipation pad (210) has an annular heat dissipation surface (211); the circuit board (220) is annular and arranged around the vertical axis; the circuit board (220) is disposed on the annular heat dissipation surface (211); the top of the circuit board (220) has an annular mounting surface (221); the light-emitting component is composed of a plurality of light-emitting elements (231), and the plurality of light-emitting elements (231) are arranged annularly at intervals along the direction surrounding the vertical axis on the annular mounting surface (221); there are a plurality of light-emitting components, which are a first light-emitting component (240) and a plurality of second light-emitting components (250). A first light-emitting component (240) and a plurality of second light-emitting components (250) are arranged sequentially at intervals along a horizontal direction away from the vertical axis, and the first light-emitting component (240) is located on the side of the plurality of second light-emitting components (250) closer to the vertical axis; the distance between the first light-emitting component (240) and an adjacent second light-emitting component (250) is greater than the distance between any two adjacent second light-emitting components (250); Along the horizontal direction away from the vertical axis, the number of light-emitting elements (231) in the second light-emitting component (250) gradually increases; the number of light-emitting elements (231) in the first light-emitting component (240) is less than the number of light-emitting elements (231) in any of the second light-emitting components (250). The circumference (300) is annular and is arranged around the vertical axis; the lower inner part of the circumference (300) abuts against the outer side of the heat sink (100), and the upper inner part of the circumference (300) is provided with an annular protrusion (310), which abuts against the annular mounting surface (221). A diffuser plate (400) is annular and arranged around the vertical axis; the diffuser plate (400) is connected to the top of the perimeter (300); the diffuser plate (400) is located above the light-emitting component.

2. Ring-shaped light source according to claim 1, characterized in that The distance between any two adjacent second light-emitting components (250) is equal.

3. Ring-shaped light source according to claim 1, characterized in that The diffuser plate (400) is at least partially located above the first annular boss (111), with the top end of the first annular boss (111) spaced apart from the bottom end of the diffuser plate (400) to define an opening (101) opposite to the first light-emitting component (240).

4. Ring-shaped light source according to claim 3, characterized in that In the horizontal direction, the top of the first annular boss (111) is higher than the top of the heat dissipation pad (210).

5. Ring-shaped light source according to claim 3, characterized in that The light-emitting element (231) includes a mounting base (232) and a light-emitting body (233); the light-emitting body (233) is connected to the circuit board (220), the mounting base (232) is arranged around the bottom of the light-emitting body (233) and abuts against the annular mounting surface (221); the top of the first annular boss (111) is lower than the top of the light-emitting body (233).

6. Ring-shaped light source according to claim 3, characterized in that The inner side of the circuit board (220) abuts against the outer side of the first annular boss (111).

7. Ring-shaped light source according to claim 1, characterized in that The second light-emitting component (250) is provided in four parts.

8. Ring-shaped light source according to claim 1, characterized in that The lower outer side of the heat sink (100) is provided with a second annular boss (112), the top of the second annular boss (112) abutting against the bottom of the circumference (300).

9. The ring light source according to claim 1, characterized in that, An annular groove (320) is provided on the upper outer side of the periphery (300), and the annular groove (320) surrounds the outer periphery of the periphery (300); multiple annular grooves (320) are provided and are arranged at intervals along the vertical direction.

10. Ring-shaped light source according to claim 1, characterized in that, It also includes a first connector and a second connector; the first connector is detachably connected to the diffuser plate (400) and the periphery (300), and the second connector is detachably connected to the periphery (300) and the heat sink (100).

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