PCB visual inspection lighting device

Abstract

The invention relates to a PCB visual inspection lighting device, and relates to the technical field of visual inspection equipment. The light source module mainly comprises a fixing plate, a fixed light source module is fixedly installed on the fixing plate, and a first light source module, a second light source module and a third light source module are movably installed on the fixing plate and distributed in a triangular shape. The fixed light source module comprises a light source element, a light gathering column, a first light uniformizing plate and a semi-transparent and semi-reflecting mirror which are arranged in a fixed shell. The illumination uniformity and brightness are improved by optimizing the structural design. In addition, the fixed shell is provided with a heat dissipation groove, a metal heat dissipation plate, heat dissipation fins and a heat dissipation fan, and the problem of heat accumulation is effectively solved. The first to third light source modules further comprise fixed fin plates, light source mounting plates, irradiation lamps, plug-in type heat dissipation fans and forced ventilation systems, and the heat dissipation performance is further enhanced. The light source device has high stability and reliability, and the PCB visual inspection effect is remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of vision detection devices, and particularly to a PCB vision detection lighting device. Background Art

[0002] As optical detection technology plays a crucial role in modern manufacturing, especially in fields such as electronic manufacturing, precision machining, and quality control. With the increasing complexity of electronic products, the requirements for the detection accuracy of product surface defects are also getting higher and higher. Traditional optical detection methods mainly rely on a single light source or multi-angle single linear light sources for illumination. Although these methods can meet the basic detection needs to a certain extent, they are inadequate when faced with complex surface defects.

[0003] Currently, to improve detection accuracy and efficiency, a common approach is to use different types of light sources in combination. For example, dark-field illumination can be used to detect fine scratches, while bright-field illumination is more suitable for detecting large-scale defects such as surface dirt and uneven points. At the same time, multi-angle light source arrangement is also one of the commonly used means, by adjusting the angle and position of the light source to obtain a more comprehensive detection perspective. In addition, there are also some light source designs based on specific wavelengths, such as ultraviolet light or infrared light, to meet the detection needs of special materials.

[0004] However, the existing multi-angle PCB vision detection lighting devices have obvious deficiencies. They usually use fixed single light sources or a limited number of fixed-angle light sources for illumination. This design not only limits the flexibility of light, but also reduces the detection effect. Specifically, due to design defects of the light source itself, such as uneven light dispersion and poor light concentration ability, the illumination efficiency of the light source is low, and it is difficult to efficiently reveal scratches and stripe-like defects of the product. Therefore, there is an urgent need for a new light source device that can effectively improve the illumination efficiency and detection effect. Summary of the Invention

[0005] To solve the above problems, this application provides a PCB vision detection lighting device.

[0006] A PCB visual inspection lighting device includes a fixed plate, on which a fixed light source module is fixedly installed. The fixed plate is also movably installed with a first light source module, a second light source module and a third light source module. The first light source module, the second light source module and the third light source module are distributed in a triangle. The fixed light source module includes a fixed housing fixedly arranged on the fixed plate. A light source element, a light condensing column and a first light homogenizing plate are installed in the fixed housing. The light condensing column and the first light homogenizing plate are installed in the linear irradiation direction of the light source element. The first light homogenizing plate is vertically clamped in the fixed housing. A semi-transparent and semi-reflective mirror is installed on the side of the first light homogenizing plate away from the light condensing column. The semi-transparent and semi-reflective mirror is installed at an inclination of 45 degrees towards the first light homogenizing plate. A light source outlet is opened on the fixed housing. The light source outlet is located directly below the semi-transparent and semi-reflective mirror. The overlapping irradiation range of the first light source module, the second light source module and the third light source module is located directly below the light source outlet.

[0007] By adopting the above technical solutions, the PCB visual inspection light source can achieve efficient lighting from multiple angles and directions. First, the fixed light source module fixed on the fixed plate and the movably installed first light source module, second light source module and third light source module are distributed in a triangle, making the lighting range wider and covering more detection areas. Secondly, the light source element inside the fixed light source module is processed by the light condensing column and the first light homogenizing plate, making the light more uniform and concentrated, and improving the utilization efficiency of the light source. The design of the semi-transparent and semi-reflective mirror enables the light to propagate along different paths, increasing the flexibility and diversity of the lighting, and further improving the detection effect. The overlapping irradiation range of multiple light source modules is located directly below the light source outlet, ensuring the lighting intensity of the key detection area and effectively improving the ability to reveal product scratches and stripe defects.

[0008] Preferably, a plurality of heat dissipation slots are opened at the top and bottom of the fixed housing respectively. The plurality of heat dissipation slots are aligned up and down. A metal heat dissipation plate is arranged in the heat dissipation slot. A plurality of heat dissipation fins with the same direction are integrally opened on the side of the metal heat dissipation plate away from the light condensing column. The light source element is fixedly installed on the metal heat dissipation plate.

[0009] By adopting the above technical solutions, a plurality of heat dissipation slots are opened at the top and bottom of the fixed housing respectively. These heat dissipation slots are aligned up and down and a metal heat dissipation plate is arranged inside. A plurality of heat dissipation fins with the same direction are integrally opened on the side of the metal heat dissipation plate away from the light condensing column. The light source element is fixedly installed on the metal heat dissipation plate. This significantly improves the heat dissipation effect of the light source element, ensures the long-term stable operation of the light source, and extends the service life of the light source. The uniformly distributed heat dissipation fins increase the heat dissipation area, further improving the heat dissipation performance and making the entire light source system more efficient and reliable.

[0010] Preferably, a plurality of fan mounting openings are further formed in the fixed housing, and heat dissipation fans are installed in the fan mounting openings, and the blowing direction of the heat dissipation fans faces the heat sink.

[0011] By adopting the above technical solution, a plurality of fan mounting openings are formed in the fixed housing and heat dissipation fans are installed therein, so that the blowing direction of the heat dissipation fans faces the heat sink. This design can significantly improve the heat dissipation effect of the light source component, thereby ensuring the stability and reliability of the light source component during long-term operation and extending the service life. At the same time, effective heat dissipation can also reduce the performance degradation caused by excessive temperature, improving the overall detection accuracy and efficiency.

[0012] Preferably, the first light homogenizing plate divides the interior of the fixed housing into a reflection cavity and a light condensing cavity. Arc-shaped grooves are formed on the top and bottom surfaces of the light condensing cavity to form arc-shaped grooves, the light condensing columns are clamped in the arc-shaped grooves, and the semi-transparent and semi-reflective mirror is installed in the reflection cavity.

[0013] By adopting the above technical solution, the first light homogenizing plate divides the interior of the fixed housing into a reflection cavity and a light condensing cavity, so that the light is converged by the light condensing columns and then reflected by the semi-transparent and semi-reflective mirror, improving the utilization rate and irradiation efficiency of the light source. At the same time, the arc-shaped grooves formed on the top and bottom surfaces of the light condensing cavity ensure the stable installation of the light condensing columns, further enhancing the uniformity and stability of the illumination. The semi-transparent and semi-reflective mirror is installed in the reflection cavity, effectively adjusting the intensity and direction of the light and improving the detection effect.

[0014] Preferably, the first light source module, the second light source module and the third light source module each include a fixed fin plate, a light source mounting plate and an irradiation lamp. The fixed fin plate and the irradiation lamp are respectively installed on two opposite surfaces of the light source mounting plate. The irradiation ranges of the irradiation lamps included in the first light source module and the second light source module can overlap. A second light homogenizing plate and a third light homogenizing plate are further fixedly arranged on the fixing plate, and the second light homogenizing plate and the third light homogenizing plate are both arranged within the irradiation range of the irradiation lamp. By adopting the above technical solution, the first light source module, the second light source module and the third light source module each include a fixed fin plate, a light source mounting plate and an irradiation lamp. The reasonable layout of these components enables the irradiation ranges of the irradiation lamps to overlap, thereby improving the illumination intensity and uniformity and effectively detecting scratches and stripe-like defects on the product surface. At the same time, the second light homogenizing plate and the third light homogenizing plate arranged on the fixing plate further enhance the uniformity and stability of the light, ensuring the accuracy and reliability of the detection result.

[0015] Preferably, the fixed fin plate includes a fixed portion and a fin portion integrally arranged. The irradiation lamp is fixedly arranged on the fixed portion, and the fin portion is provided with straight fins opening towards the side away from the fixed portion.

[0016] By adopting the above technical solutions, the design of the fixed fin plate not only improves the structural stability but also increases the heat dissipation area. The integral setting of the fixed part and the fin part ensures the stable installation of the irradiation lamp, and the fin part is opened on the side away from the fixed part and set as a straight fin, significantly enhancing the air circulation and improving the heat dissipation effect, thus ensuring the stability and reliability of the light source during long-term operation.

[0017] Preferably, each of the first light source module, the second light source module, and the third light source module includes a plurality of plug-in heat dissipation fans. The surface of the plug-in heat dissipation fan is provided with sockets that can be plugged onto the fin part. The plurality of plug-in heat dissipation fans are arranged in a straight line and plugged onto the fin part. By adopting the above technical solutions, the design of the plug-in heat dissipation fan enables heat to be quickly conducted out from the inside of the light source module, and the heat dissipation effect is enhanced through the effective contact area of the fin part, ensuring the temperature stability of the light source components during long-term operation, improving the reliability and service life of the system. At the same time, the plug-in installation method is convenient for maintenance and replacement, reducing the maintenance cost.

[0018] Preferably, at least two cavities are formed in the fixed part along the length direction of the light source mounting plate to form a ventilation cavity, and the ventilation cavity is externally connected with a forced ventilation pipe.

[0019] By adopting the above technical solutions, the PCB vision inspection light source can improve the heat dissipation performance while ensuring the stability and service life of the light source. The ventilation cavity formed by at least two cavities opened in the fixed part along the length direction of the light source mounting plate enables heat to be quickly discharged, avoiding affecting the working efficiency and life of the light source components due to excessive temperature. The external connection of the ventilation cavity with the forced ventilation pipe further enhances the heat dissipation effect, ensuring the efficient operation of the entire system.

[0020] Preferably, drive holes are opened on both end faces of each light source mounting plate of the first light source module, the second light source module, and the third light source module facing the fixed plate, and at least two drive holes are opened on one end face of the light source mounting plate.

[0021] By adopting the above technical solutions, drive holes are opened on both end faces of each light source mounting plate of the first light source module, the second light source module, and the third light source module of the PCB vision inspection light source facing the fixed plate, and at least two drive holes are opened on one end face. This design enables the light source module to adjust its position and angle more flexibly, improving the accuracy and adaptability of the light source irradiation, and thus better meeting different detection requirements. The design of multiple drive holes also enhances the structural stability and reliability, ensuring the performance stability of the light source module during long-term operation.

[0022] Preferably, a rotation drive unit and a translation drive unit are provided at the position of the fixed plate corresponding to the drive holes. The rotation drive unit is composed of a circular through-hole and an arc-shaped through-groove, and the translation drive unit is composed of at least two straight through-grooves.

[0023] By adopting the above technical solutions, the rotation drive unit and the translation drive unit provided on the fixed plate enable the first light source module, the second light source module, and the third light source module to achieve precise rotation and translation adjustments on the fixed plate. The rotation drive unit is composed of a circular through-hole and an arc-shaped through-groove, which can enable the light source module to rotate around a fixed axis, thereby changing the irradiation angle; the translation drive unit is composed of at least two straight through-grooves, which can enable the light source module to move in a specific direction and adjust the irradiation position. This flexible adjustment ability helps to optimize the lighting conditions, improve the detection accuracy, and ensure that different types of defects can be effectively identified.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By providing a fixed light source module and three first light source modules, second light source modules, and third light source modules distributed in a triangle, multi-angle light coverage is achieved, significantly improving the flexibility and detection effect of the detection system, especially showing excellent performance in detecting defects such as "vertical scratches"; 2. The design of the converging light column and the first light homogenizing plate in the fixed light source module ensures the uniform distribution and efficient aggregation of light, improves the irradiation efficiency of the light source, and further enhances the ability to reveal product surface defects; 3. The 45-degree inclined installation method of the semi-transparent and semi-reflective mirror enables the incident light to be reflected and finally irradiate vertically downward from the light source outlet, ensuring the effective utilization of light and avoiding the problem of poor detection effect caused by light dispersion in traditional single light sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present application; Figure 2 is a positional relationship diagram of the fixed light source module, the first light source module, the second light source module, and the third light source module; Figure 3 is a three-dimensional view of the fixed light source module; Figure 4 and Figure 5 is an internal structure view of the fixed light source module; Figure 6 is a structural view of the fixed plate and the drive holes; Figure 7 is a three-dimensional view of the light source module; Figure 8 is a sectional view of the light source module with a break;

[0026] Description of the reference numerals: 10, fixed plate; 100, fixed light source module; 1, fixed housing; 11, heat dissipation groove; 111, heat sink; 112, metal heat dissipation plate; 12, fan mounting opening; 121, heat dissipation fan; 13, light source mounting groove; 14, reflection cavity; 141, semi-transparent and semi-reflective mirror; 142, light source outlet; 15, condenser cavity; 2, light source element; 3, arc surface groove; 31, condenser column; 41, first light homogenizing plate; 110, first light source module; 5, fixed fin; 51, fixing part; 52, fin part; 6, light source mounting plate; 61, driving hole; 63, ventilation cavity; 64, forced ventilation pipe; 7, plug-in heat dissipation fan; 8, irradiation lamp; 120, second light source module; 130, third light source module; 42, second light homogenizing plate; 43, third light homogenizing plate; 91, rotation driving unit; 92, translation driving unit. Detailed implementation manners

[0027] The present application will be further described in detail below with reference to the accompanying drawings.

[0028] In the description of the invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0029] The embodiment of the present application discloses a PCB vision inspection lighting device. Refer to Figures 1 - 5, including a fixed plate 10, on which a fixed light source module 100 is fixedly installed. On the fixed plate 10, a first light source module 110, a second light source module 120 and a third light source module 130 are also movably installed. The first light source module 110, the second light source module 120 and the third light source module 130 are distributed in a triangular shape, and the first light source module 110, the second light source module 120 and the third light source module 130 are all arranged at the bottom of the fixed light source module 100. The fixed light source module 100 includes a fixed housing 1 fixedly arranged on the fixed plate 10, and both ends of the fixed housing 1 are provided with the fixed plate 10. A light source element 2, a light condensing column 31 and a first light homogenizing plate 41 are installed in the fixed housing 1. The light source element 2 can be an LED lamp bead or a laser. The light condensing column 31 and the first light homogenizing plate 41 are installed in the linear irradiation direction of the light source element 2, so that the light condensing column 31 can effectively concentrate the light to a predetermined area. The first light homogenizing plate 41 is vertically clamped in the fixed housing 1, and a semi-transparent and semi-reflective mirror 141 is installed on the side of the first light homogenizing plate 41 away from the light condensing column 31. The first light homogenizing plate 41 is made of acrylic material and its surface is subjected to a matte treatment, which can make the light spread more evenly and avoid the phenomenon of local overbrightness or overdarkness. The semi-transparent and semi-reflective mirror 141 adopts a coating technology, which can reflect part of the light while ensuring a certain transmittance, so as to realize the multiple utilization of light. A light source outlet 142 is opened on the fixed housing 1, and the light source outlet 142 is located directly below the semi-transparent and semi-reflective mirror 141. The irradiation overlapping range of the first light source module 110, the second light source module 120 and the third light source module 130 is located directly below the light source outlet 142. The first light homogenizing plate 41 divides the interior of the fixed housing 1 into a reflection cavity 14 and a light condensing cavity 15. Arc-shaped grooves are formed on the top and bottom surfaces of the light condensing cavity 15 to form an arc surface groove 3, and the light condensing column 31 is clamped in the arc surface groove 3, ensuring the stability of the light condensing column 31 and the accuracy of the optical path. The semi-transparent and semi-reflective mirror 141 is installed in the reflection cavity 14, and the semi-transparent and semi-reflective mirror 141 is installed at an inclination of 45 degrees towards the first light homogenizing plate 41. By installing at an inclination of 45 degrees, part of the light directly passes through the semi-transparent and semi-reflective mirror 141, and the other part of the light is reflected to the required position, improving the light source utilization rate.

[0030] A plurality of heat dissipation grooves 11 are provided at the top and bottom of the fixed housing 1, and the plurality of heat dissipation grooves 11 are aligned up and down. A metal heat dissipation plate 112 is arranged in the heat dissipation groove 11. On the side of the metal heat dissipation plate 112 away from the light collecting column 31, a plurality of heat dissipation fins 111 with the same direction are integrally formed. The light source element 2 is fixedly installed on the metal heat dissipation plate 112. By increasing the heat dissipation surface area, the heat transfer speed is accelerated, thereby improving the heat dissipation efficiency of the light source element 2 and making the service time of the light source element 2 more durable. A plurality of fan mounting openings 12 are also provided on the fixed housing 1, and heat dissipation fans 121 are installed in the fan mounting openings 12. The blowing direction of the heat dissipation fans 121 faces the heat dissipation fins 111. These heat dissipation fans 121 can be automatically started and stopped according to the actual working temperature to maintain the best working state. The first light source module 110, the second light source module 120, and the third light source module 130 all include fixed wing plates 5, light source mounting plates 6, and irradiation lamps 8. The fixed wing plates 5 and the irradiation lamps 8 are respectively installed on two opposite surfaces of the light source mounting plate 6. The irradiation ranges of the irradiation lamps 8 included in the first light source module 110 and the second light source module 120 can overlap. A second light homogenizing plate 42 and a third light homogenizing plate 43 are also fixedly arranged on the fixing plate 10. The second light homogenizing plate 42 and the third light homogenizing plate 43 are both arranged within the irradiation range of the irradiation lamp 8, further enhancing the uniformity of the light. The fixed wing plate 5 includes a fixed portion 51 and a fin portion 52 integrally provided. The irradiation lamp 8 is fixedly arranged on the fixed portion 51. The fin portion 52 is provided with flat fins on the side facing away from the fixed portion 51. This design is beneficial to increasing the air circulation area and improving the heat dissipation effect.

[0031] Referring to Figure 7 and Figure 8 , the first light source module 110, the second light source module 120, and the third light source module 130 all include a plurality of plug-in heat dissipation fans 7. The surface of the plug-in heat dissipation fans 7 is provided with sockets that can be plugged into the fin portion 52. The plurality of plug-in heat dissipation fans 7 are arranged in a straight line and plugged and installed on the fin portion 52. This modular heat dissipation design can not only increase or decrease the number of heat dissipation fans according to needs, but also facilitate maintenance and replacement. At least two cavities are formed in the fixed portion 51 along the length direction of the light source mounting plate 6 to form a ventilation cavity 63, and the ventilation cavity 63 is externally connected with a forced ventilation pipe 64. Each light source mounting plate 6 of the first light source module 110, the second light source module 120, and the third light source module 130 is provided with driving holes 61 on two end faces facing the fixing plate 10, and at least two driving holes 61 are provided on one end face of the light source mounting plate 6. By adopting this dual heat dissipation measure of plug-in heat dissipation fans 7 and forced ventilation, it is ensured that even under the condition of long-term continuous operation, a lower temperature rise can be maintained, preventing failures caused by overheating.

[0032] Referring to Figure 6, at the position corresponding to the driving hole 61 on the fixed plate 10, a rotation driving unit 91 and a translation driving unit 92 are provided. The rotation driving unit 91 is composed of a circular through-hole and an arc-shaped through-groove, and the translation driving unit 92 is composed of at least two straight through-grooves. The driving hole 61 is used to cooperate with an electric driving device (the electric driving device is not shown in the conventional drawings). The electric driving device is inserted into the driving hole 61. The rotation driving unit 91 is composed of a circular through-hole and an arc-shaped through-groove. The circular through-hole is used for positioning and serves as the center of the circle, and the arc-shaped through-groove serves as a guiding function. This setting enables the electric driving device to drive the light source module to rotate. The translation driving unit 92 is composed of at least two straight through-grooves and cooperates with the electric driving device inserted into the driving hole 61, which can drive the light source module to translate, so as to facilitate the adjustment of the angle, flexibly adjust the position and angle of each light source module to meet different detection requirements.

[0033] The implementation principle of the embodiment of this application is as follows: Place the test piece directly below the light source outlet 142 and make it within the irradiation range of the irradiation lamps 8 of the first light source module 110, the second light source module 120, and the third light source module 130. By adjusting the angles of the first light source module 110, the second light source module 120, and the third light source module 130, the changes on the surface of the object to be tested are realized. The light rays emitted by the light source element 2 are concentrated by the condenser column 31 to make the light rays highly concentrated, improving the irradiation efficiency of the light source and further enhancing the ability to reveal surface defects of the product. The light rays passing through the condenser column 31 are evenly distributed by the light homogenizing plate. The semi-transparent and semi-reflective mirror 141 installed at an angle of 45 degrees enables the incident light to be reflected, and finally irradiates vertically downward from the light source outlet 142, ensuring the effective utilization of light and avoiding the problem of poor detection effect caused by light dispersion of traditional single light sources.

[0034] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A PCB visual inspection lighting device, characterized in that: The invention comprises a fixed plate (10), on which a fixed light source module (100) is fixedly mounted, and on which a first light source module (110), a second light source module (120) and a third light source module (130) are also movably mounted, wherein the first light source module (110), the second light source module (120) and the third light source module (130) are distributed in a triangular shape, and the fixed light source module (100) comprises a fixed housing (1) fixedly arranged on the fixed plate (10), wherein a light source element (2), a focusing column (31) and a first light scattering plate (41) are mounted in the fixed housing (1), and the focusing column (31) and the first light scattering plate (41) are mounted in the fixed housing (1). In the straight-line irradiation direction of the light source element (2), the first light averaging plate (41) is vertically snapped into the fixed shell (1), a semi-transparent and semi-reflective mirror (141) is installed on the side of the first light averaging plate (41) away from the focusing column (31), and the semi-transparent and semi-reflective mirror (141) is installed at an angle of 45 degrees toward the direction of the first light averaging plate (41), a light source outlet (142) is opened on the fixed shell (1), and the light source outlet (142) is located directly below the semi-transparent and semi-reflective mirror (141), and the irradiation overlap range of the first light source module (110), the second light source module (120) and the third light source module (130) is located directly below the light source outlet (142).

2. A PCB visual inspection lighting device according to claim 1, characterized in that: The top and bottom of the fixed housing (1) are each provided with a plurality of heat dissipation grooves (11), the plurality of heat dissipation grooves (11) are aligned vertically, a metal heat dissipation plate (112) is arranged in the heat dissipation groove (11), a side of the metal heat dissipation plate (112) away from the focusing column (31) is integrally provided with a plurality of heat dissipation fins (111) in the same direction, and the light source element (2) is fixedly mounted on the metal heat dissipation plate (112).

3. A PCB visual inspection lighting device according to claim 2, characterized in that: The fixed housing (1) is also provided with a plurality of fan installation openings (12), and cooling fans (121) are installed in the fan installation openings (12), and the blowing direction of the cooling fans (121) is toward the heat sink (111).

4. A PCB visual inspection lighting device according to claim 1, characterized in that: The first light-dispersing plate (41) divides the interior of the fixed shell (1) into a reflection cavity (14) and a focusing cavity (15); the top and bottom surfaces of the focusing cavity (15) are provided with arc-shaped grooves to form an arc-surface groove (3); the focusing column (31) is clamped in the arc-surface groove (3); and the semi-transparent and semi-reflective mirror (141) is installed in the reflection cavity (14).

5. The PCB visual inspection lighting device according to claim 1, characterized in that: The first light source module (110), the second light source module (120) and the third light source module (130) all include a fixed fin plate (5), a light source mounting plate (6) and an irradiation lamp (8); the fixed fin plate (5) and the irradiation lamp (8) are respectively mounted on two opposite surfaces of the light source mounting plate (6); the irradiation ranges of the irradiation lamps (8) included in the first light source module (110) and the second light source module (120) can overlap; a second light averaging plate (42) and a third light averaging plate (43) are also fixedly arranged on the fixed plate (10); the second light averaging plate (42) and the third light averaging plate (43) are both arranged within the irradiation range of the irradiation lamp (8).

6. A PCB visual inspection lighting device according to claim 5, characterized in that: The fixed fin plate (5) comprises a fixed portion (51) and a fin portion (52) which are integrally arranged, the irradiation lamp (8) is fixedly arranged on the fixed portion (51), and the fin portion (52) is opened toward a side away from the fixed portion (51) and is arranged as a straight fin.

7. A PCB visual inspection lighting device according to claim 6, characterized in that: The first light source module (110), the second light source module (120) and the third light source module (130) all comprise a plurality of plug-in cooling fans (7), the surfaces of the plug-in cooling fans (7) being provided with sockets capable of being plugged into the fin portion (52), and the plurality of plug-in cooling fans (7) are arranged in a straight line and plug-mounted on the fin portion (52).

8. The PCB visual inspection lighting device according to claim 6, characterized in that: At least two cavities are opened in the fixing portion (51) along the length direction of the light source mounting plate (6) to form a ventilation cavity (63), and the ventilation cavity (63) is externally connected to a forced ventilation pipe (64).

9. The PCB visual inspection lighting device according to claim 5, characterized in that: Each of the light source mounting plates (6) in the first light source module (110), the second light source module (120) and the third light source module (130) is provided with drive holes (61) on both end surfaces facing the fixing plate (10), and one end surface of the light source mounting plate (6) is provided with at least two drive holes (61).

10. The PCB visual inspection lighting device according to claim 9, characterized in that: The fixed plate (10) is provided with a rotation drive unit (91) and a translation drive unit (92) at a position corresponding to the drive hole (61); the rotation drive unit (91) is composed of a circular through hole and an arc-shaped through slot; and the translation drive unit (92) is composed of at least two straight through slots.

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