Arcuate linear light source

Abstract

The utility model discloses a kind of arc linear light source, comprising: arc shell, the arc shell is half ring frame body structure, and the inner ring end of the arc shell forms light outlet;Diffusion plate is set on the light outlet;LED circuit board is clamped in the arc shell interior, and LED light bar is set on the LED circuit board;Light collecting rod is set between the LED circuit board and transparent plate;The arc shell interior is provided with ventilation air passage, the ventilation air passage is from the middle of arc shell to the both sides to the both ends of arc shell, so that the ventilation air passage covers the LED circuit board, and the both ends of arc shell form air outlet, and the middle of arc shell is equipped with air inlet.The utility model solves the imaging problem of arc surface product, through arc linear light source, in lighting detection, obtain uniform, contrast high image, such as product with radian, such as mobile phone middle frame, improve detection efficiency, through air cooling, increase heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of detection light source technology, and in particular to an arc-shaped linear light source. Background Technology

[0002] In current applications of visual light sources, particularly in line scan, the linear scanning camera's chip is typically strip-shaped, and the light source is usually a line light source as well. When inspecting planar objects, it generally produces uniform, high-contrast images. However, when the object is curved, the line light source cannot produce a uniform image. While using a curved light source to surround and illuminate a curved object can produce a uniform image, it introduces another problem: weak contrast of defect features. Furthermore, current line light sources typically place the LED circuit board close to the casing, with thermally conductive adhesive placed between them for heat dissipation. Although this provides some heat dissipation, it cannot maintain stable heat dissipation during prolonged operation, severely affecting the stability of the light source. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an arc-shaped linear light source. This invention solves the imaging problem of curved products. By using an arc-shaped linear light source, uniform and high-contrast images can be obtained in the lighting inspection process, such as for products with curvature like the mid-frame of a mobile phone, thereby improving inspection efficiency. Air cooling further enhances heat dissipation efficiency.

[0004] To achieve the above objectives, this utility model provides an automatic polishing device for irregularly shaped plates, comprising:

[0005] An arc-shaped housing, wherein the arc-shaped housing is a semi-annular frame structure, and a light outlet is formed at the inner ring end of the arc-shaped housing;

[0006] A diffuser plate is disposed on the light outlet;

[0007] An LED circuit board is snapped into the inside of an arc-shaped housing, and LED light strips are provided on the LED circuit board;

[0008] A light-concentrating rod disposed between the LED circuit board and the transparent plate;

[0009] The arc-shaped housing has a ventilation duct inside, which extends from the middle of the arc-shaped housing to both ends of the arc-shaped housing, so that the ventilation duct covers the LED circuit board, forming air outlets at both ends of the arc-shaped housing, and an air inlet in the middle of the arc-shaped housing.

[0010] Furthermore, the arc-shaped housing includes a lower cover plate, an upper cover plate, and two front end plates. The lower and upper cover plates are detachably connected, and the aforementioned diffuser plate, LED circuit board, and focusing rod are snapped between the lower and upper cover plates. The two front end plates are respectively located at the front ends of the lower and upper cover plates, and the air outlet is located on the front end plates. This detachable structure facilitates quick assembly, maintenance, or replacement of internal components, reducing maintenance costs and time.

[0011] Furthermore, both the lower and upper cover plates are provided with symmetrically fitted first, second, and third slots. The first slot is adjacent to the light outlet, the diffuser plate is snapped onto the first slot, the focusing rod is snapped onto the second slot, and the LED circuit board is snapped onto the third slot. The second slot is positioned between the first and third slots. By securing the core optical components with the slots of the upper and lower cover plates, precise optical path alignment is ensured, offsets caused by vibration or external forces are reduced, and the stability of the light source is improved.

[0012] Furthermore, the ends of the second and third grooves respectively form a first guide slope and a second guide slope. The guide slope plays a guiding role, and during the assembly process (such as when inserting a spotlight rod or LED circuit board), it can automatically correct positional deviations, reduce manual adjustment time, and improve assembly efficiency.

[0013] Furthermore, the third groove of the lower cover plate protrudes upward from the side wall away from the second groove to form a heat dissipation wall for close contact with the LED circuit board, and the ventilation duct surrounds the other side of the heat dissipation wall. The ventilation duct surrounds the other side of the heat dissipation wall, forming an airflow-enveloping heat dissipation, which, together with an external air source, can quickly remove the heat from the heat dissipation wall, avoiding the airflow dead zones of traditional single-sided heat dissipation, and making heat dissipation more uniform.

[0014] Furthermore, a first opening is provided on one side of the heat dissipation wall, connecting the ventilation duct and the second tank. The first opening is a funnel-shaped opening that gradually widens from the ventilation duct towards the second tank. The first opening not only facilitates the connection of LED circuit board wires but also reduces airflow resistance, allowing air to enter the second tank more smoothly from the ventilation duct, reducing turbulence and pressure loss, and increasing heat dissipation airflow.

[0015] Furthermore, thermal silicone is applied between the LED circuit board and the heat sink. The thermal silicone fills the microscopic gaps between the LED circuit board and the heat sink, eliminating air thermal resistance and allowing heat to be conducted from the LED to the heat sink more quickly.

[0016] Furthermore, the focusing rod is an arc-shaped cylinder whose shape matches that of the arc-shaped housing. The curvature of the focusing rod perfectly matches that of the housing, ensuring that the light emitted by the LED, after being refracted / reflected by the focusing rod, precisely matches the curvature of the light outlet of the housing, reducing light loss.

[0017] Furthermore, the diffuser plate includes a transparent plate and a diffuser film disposed on the transparent plate. The diffuser plate is an integral structure in which the diffuser film is bonded to the transparent plate through a bonding process. The diffusion film is combined with the transparent plate through a precision bonding process, which can eliminate the air gap of the traditional split structure, realize stepless diffusion of light within the plate, and at the same time avoid the situation where the traditional film is deformed by heat and falls off, effectively improving the stability of the light source.

[0018] Furthermore, the diffusion film includes PC (polycarbonate) diffusion film, PET (polyester) diffusion film, or LSD (LightShaping Diffuser) film.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This utility model includes a detachably connected upper cover plate, a lower cover plate, and two front end plates. A PCB circuit board is snapped into the upper and lower cover plates. A highly thermally conductive silicone pad is added to the back of the PCB circuit board, which conducts heat to the upper and lower cover plates. The upper and lower cover plates have front end plates at both ends, each with an air outlet. After the upper and lower cover plates are assembled, a ventilation channel is formed. The lower cover plate is connected to an air pipe connector that connects to the ventilation channel, allowing for external air pipe connection. Through air cooling, heat is dissipated from the air outlets of the front end plates to the external environment. A circular focusing rod is formed into an arc shape through a hot bending process. In this embodiment, the diffuser plate is a transparent plate and a diffuser film bonded together to form an integrated diffuser plate, preventing the diffuser film from deforming and falling off. This structure solves the imaging problem of curved products. Through an arc-shaped linear light source, a uniform, high-contrast image is obtained during illumination inspection, such as for curved products like mobile phone frames, improving inspection efficiency. Air cooling further enhances heat dissipation efficiency. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the structure of an arc-shaped linear light source according to this utility model;

[0023] Figure 2 yes Figure 1 Exploded view diagram;

[0024] Figure 3 yes Figure 1Schematic diagram of the cross section along line AA;

[0025] Figure 4 yes Figure 3 Enlarged view of region B in the middle;

[0026] Figure 5 This is a schematic diagram of the arc-shaped shell of this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the lower cover plate of this utility model;

[0028] Figure 7 This is a partial cross-sectional schematic diagram of the diffuser plate of this utility model.

[0029] The diagram includes:

[0030] 1. Arc-shaped shell; 11. Light outlet; 12. Lower cover plate; 121. First groove; 122. Second groove; 1221. First guide slope section; 123. Third groove; 1231. Second guide slope section; 1232. Heat dissipation wall; 124. Ventilation duct; 125. Air inlet; 126. First opening; 13. Upper cover plate; 14. Front end plate; 141. Air outlet; 15. Quick air inlet connector; 2. Diffuser plate; 21. Transparent plate; 22. Diffuser film; 3. LED circuit board; 31. LED light strip; 4. Focusing rod; 5. Thermal silicone. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Please see Figures 1 to 7An embodiment of this utility model provides an arc-shaped linear light source, including an arc-shaped housing 1, a diffuser plate 2, an LED circuit board 3, and a focusing rod 4. LED strips 31 are disposed on the LED circuit board 3.

[0035] like Figures 1 to 5 As shown, the arc-shaped housing 1 has a semi-circular frame structure. A light outlet 11 is formed at the inner ring end of the arc-shaped housing 1. Specifically, the arc-shaped housing 1 in this embodiment is a detachable splicing structure. The arc-shaped housing 1 includes a lower cover plate 12, an upper cover plate 13, and two front end plates 14. The lower cover plate 12 and the upper cover plate 13 are detachably connected. The diffuser plate 2, the LED circuit board 3, and the focusing rod 4 are snapped between the lower cover plate 12 and the upper cover plate 13. The two front end plates 14 are respectively disposed at the front ends of the lower cover plate 12 and the upper cover plate 13. The upper cover plate 13 and the lower cover plate 12 can be detachably locked by screws or other connecting parts. Similarly, the two front end plates 14 can also be detachably locked by screws or other connecting parts.

[0036] like Figure 6 As shown, both the lower cover plate 12 and the upper cover plate 13 are provided with symmetrically matched first groove 121, second groove 122 and third groove 123. The first groove 121 is adjacent to the light outlet 11. The diffuser plate 2 is inserted into the first groove 121, the focusing rod 4 is inserted into the second groove 122, and the LED circuit board 3 is inserted into the third groove 123. The second groove 122 is placed between the first groove 121 and the third groove 123, so that the focusing rod 4 is placed between the LED circuit board 3 and the diffuser plate 2. It should be noted that the shapes of the first groove 121, the second groove 122 and the third groove 123 are the same as those of the arc-shaped shell 1, and are in a semi-ring structure. After splicing, the LED circuit board 3, the focusing rod 4 and the diffuser plate 2 can be limited and fixed respectively, so that the above components cannot be moved.

[0037] Preferably, in this embodiment, the focusing rod 4 is made into an arc-shaped cylindrical structure by a hot bending process, so that the arc curvature of the focusing rod 4 is perfectly matched with the shell, ensuring that the light emitted by the LED can accurately fit the arc of the light outlet 11 of the shell after being refracted / reflected by the focusing rod 4, reducing light loss. In order to facilitate the installation of the focusing rod 4 in the second groove 122, a first guide inclined section 1221 is formed at the end of the second groove 122. The first guide inclined section 1221 slopes downward from the upper end of the second groove 122, thereby guiding the installation of the focusing rod 4. At the same time, it makes the second groove 122 no longer have right-angled sharp corners, avoiding collisions with the focusing rod 4 during the installation process and causing damage to the focusing rod 4, thereby affecting its focusing effect.

[0038] Similarly, to prevent the LED circuit board 3 from colliding with the corners of the third groove 123 during installation, this embodiment also sets the end of the third groove 123 as a second guide inclined section 1231, thereby further protecting the LED light strip 31.

[0039] In order for the LED circuit board 3 to be installed in the third groove 123, the LED light strip 31 facing the light outlet 11 needs to be higher than the side wall of the third groove 123. Therefore, the height of the LED circuit board 3 needs to be adjusted. After adjustment, only the upper and lower ends of the LED circuit board 3 are inserted into the third groove 123. Therefore, in order to make the installation of the LED circuit board 3 more stable, the side wall of the third groove 123 of the lower cover plate 12 in this embodiment protrudes upward to form a heat dissipation wall 1232 for tightly adhering to the LED circuit board 3. In addition to supporting the LED circuit board 3, the heat dissipation wall 1232 can also directly conduct heat to the LED circuit board 3. Preferably, a heat dissipation silicone 5 is provided between the heat dissipation wall 1232 and the LED circuit board 3. The heat dissipation silicone 5 can fill the micro gap between the LED circuit board 3 and the heat dissipation wall 1232, eliminate air thermal resistance, and make heat conduct from the LED to the heat dissipation wall 1232, the upper cover plate 13 and the lower cover plate 12 more quickly.

[0040] Furthermore, such as Figures 2 to 6 As shown, a ventilation duct 124 is provided inside the arc-shaped housing 1, and an air inlet 125 is provided in the middle of the arc-shaped housing 1. The ventilation duct 124 extends from the middle of the arc-shaped housing 1 to both ends of the arc-shaped housing 1, so that the ventilation duct 124 surrounds the other side of the heat dissipation wall 1232. An air outlet 141 is formed at both ends of the arc-shaped housing 1. The air outlet 141 is provided on the front end plate 14. An air inlet quick connector 15 is provided at the air inlet 125. During operation, an external air cooling source can be connected through the air inlet quick connector 15, so that the heat dissipation gas enters from the air inlet 125 and exits from the air outlet 141 of the two front end plates 14 through the ventilation duct 124. During the flow of the heat dissipation gas in the ventilation duct 124, the heat of the upper and lower cover plates 12 will be carried out, thereby achieving the heat dissipation effect on the LED circuit board 3.

[0041] As a preferred embodiment, a first opening 126 is provided on one side of the heat dissipation wall 1232, which connects the ventilation duct 124 and the second tank 122. The first opening 126 is a funnel-shaped opening that gradually expands from the ventilation duct 124 to the second tank 122. The first opening 126 not only facilitates the connection of the LED circuit board 3 wires, but also reduces airflow resistance, allowing air to enter the second tank 122 more smoothly from the ventilation duct 124, reducing turbulence and pressure loss, and increasing the heat dissipation airflow.

[0042] In this embodiment, as Figure 7As shown, the diffuser plate 2 is an integrated structure, specifically comprising a transparent plate 21 and a diffuser film 22 disposed on the transparent plate 21. The diffuser plate 2 is an integrated structure in which the diffuser film 22 is bonded to the transparent plate 21 through a bonding process. The diffusion film 22 is combined with the transparent plate 21 through a precision bonding process, which can eliminate the air gap of the traditional split structure and realize stepless diffusion of light within the plate. Furthermore, it can also avoid the situation where the traditional film is deformed by heat and falls off, effectively improving the stability of the light source.

[0043] The transparent plate 21 is usually made of a transparent substrate, while the diffusion film 22 can be selected according to different diffusion requirements. For example, PC (polycarbonate) diffusion film 22, PET (polyester) diffusion film 22 or LSD (LightShaping Diffuser) film can be selected.

[0044] 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. An arc-shaped linear light source, characterized in that, include: Arc-shaped housing (1), the arc-shaped housing (1) is a semi-ring frame structure, and a light outlet (11) is formed at the inner ring end of the arc-shaped housing (1); A diffuser plate (2) is disposed on the light outlet (11); An LED circuit board (3) is snapped into the inside of the arc-shaped housing (1), and an LED light strip (31) is provided on the LED circuit board (3); A light-concentrating rod (4) is disposed between the LED circuit board (3) and the transparent plate (21); The arc-shaped housing (1) is provided with a ventilation duct (124) inside. The ventilation duct (124) extends from the middle of the arc-shaped housing (1) to both sides of the arc-shaped housing (1), so that the ventilation duct (124) covers the LED circuit board (3). Air outlets (141) are formed at both ends of the arc-shaped housing (1), and an air inlet (125) is provided in the middle of the arc-shaped housing (1).

2. The arc-shaped linear light source according to claim 1, characterized in that, The arc-shaped housing (1) includes a lower cover plate (12), an upper cover plate (13), and two front end plates (14). The lower cover plate (12) and the upper cover plate (13) are detachably connected, and the aforementioned diffuser plate (2), LED circuit board (3), and focusing rod (4) are snapped between the lower cover plate (12) and the upper cover plate (13). The two front end plates (14) are respectively disposed at the front ends of the lower cover plate (12) and the upper cover plate (13), and the air outlet (141) is disposed on the front end plate (14).

3. The arc-shaped linear light source according to claim 2, characterized in that, The lower cover plate (12) and the upper cover plate (13) are each provided with a symmetrically matched first groove (121), a second groove (122) and a third groove (123). The first groove (121) is adjacent to the light outlet (11). The diffuser plate (2) is snapped onto the first groove (121). The light-concentrating rod (4) is snapped onto the second groove (122). The LED circuit board (3) is snapped onto the third groove (123). The second groove (122) is placed between the first groove (121) and the third groove (123).

4. The arc-shaped linear light source according to claim 3, characterized in that, The ends of the second groove (122) and the third groove (123) respectively form a first guide inclined section (1221) and a second guide inclined section (1231).

5. The arc-shaped linear light source according to claim 3, characterized in that, The third groove (123) of the lower cover plate (12) protrudes upward from the side wall away from the second groove (122) to form a heat dissipation wall (1232) for close contact with the LED circuit board (3), and the ventilation duct (124) surrounds the other side of the heat dissipation wall (1232).

6. The arc-shaped linear light source according to claim 5, characterized in that, A first opening (126) is provided on one side of the heat dissipation wall (1232) to connect the ventilation duct (124) and the second tank (122). The first opening (126) is a funnel-shaped opening that gradually expands from the ventilation duct (124) to the second tank (122).

7. The arc-shaped linear light source according to claim 5, characterized in that, Thermal silicone (5) is provided between the LED circuit board (3) and the heat sink (1232).

8. The arc-shaped linear light source according to claim 1, characterized in that, The focusing rod (4) is an arc-shaped column whose shape matches that of the arc-shaped shell (1).

9. The arc-shaped linear light source according to claim 1, characterized in that, The diffusion plate (2) includes a transparent plate (21) and a diffusion film (22) disposed on the transparent plate (21). The diffusion plate (2) is an integral structure in which the diffusion film (22) is bonded to the transparent plate (21) by a bonding process.

10. An arc-shaped linear light source according to claim 9, characterized in that, The diffusion film (22) includes a PC diffusion film, a PET diffusion film, or an LSD film.

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