Combined light source for visual scratch detection of PCB (Printed Circuit Board)

Abstract

The utility model discloses a combined light source for visual scratch detection of a PCB (Printed Circuit Board). The combined light source comprises two side plates, a coaxial light source assembly and two groups of area array line light source assemblies, a spectroscope and a diffusion plate group are detachably connected between the two side plates, a light path channel is formed between the diffusion plate group, the spectroscope is arranged right above the light path channel, and a light outlet communicated with the light path channel is arranged below the two side plates; the two ends of the coaxial light source assembly are detachably connected with the two side plates respectively, and the coaxial light source assembly is arranged on one side of the spectroscope and right faces the spectroscope. The two ends of the area array line light source assemblies are detachably connected with the two side plates respectively, and the two sets of area array line light source assemblies are arranged on the two sides of the diffusion plate set respectively. A first cooling structure and a second cooling structure are arranged on the coaxial light source assembly and the area array line light source assembly respectively. According to the utility model, the overall operability is improved, and the requirements of different scenes are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of detection light source, especially a PCB visual scratch detection combination light source. BACKGROUND

[0002] The commonly used lighting mode of the PCB visual scratch detection light source is coaxial light, low-angle and high-angle illumination respectively, these methods are remarkable for detecting hard scratch effect, low-angle can highlight the scratch effect by the light irradiation perpendicular to the scratch, and the effect is obvious in the image, and high-angle is suitable for detecting soft scratch, and the high-angle light source can enhance the visualization effect of soft scratch.

[0003] However, different light sources need to be replaced for detection when detecting at different heights and angles, which is troublesome and affects the detection efficiency, and moreover, the current detection light source structure is too complex, resulting in high cost of the shell and poor heat dissipation effect. SUMMARY

[0004] The utility model discloses a PCB visual scratch detection combination light source, which connects a coaxial light source and four polarizing surface light sources into a whole through a connecting piece, uses the coaxial light source and the polarizing surface light source according to the demand, improves the operability of the whole and meets the demand of different scenes.

[0005] To achieve the above object, the utility model provides a PCB visual scratch detection combination light source, which comprises two side plates, a coaxial light source assembly and two groups of surface array line light source assemblies.

[0006] A beam splitter and a diffusion plate group are detachably connected between the two side plates, a light path channel is formed between the diffusion plate group, the beam splitter is arranged directly above the light path channel, and a light outlet is arranged on the lower side of the two side plates and communicates with the light path channel.

[0007] The two ends of the coaxial light source assembly are detachably connected with the two side plates respectively, and the coaxial light source assembly is arranged on one side of the beam splitter and faces the beam splitter.

[0008] The two ends of the surface array line light source assembly are detachably connected with the two side plates respectively, and the two groups of surface array line light source assemblies are arranged on the two sides of the diffusion plate group respectively.

[0009] First cooling structures and second cooling structures are arranged on the coaxial light source assembly and the surface array line light source assembly respectively.

[0010] Further, a baffle plate is arranged on the other side of the beam splitter opposite to the coaxial light source assembly. The baffle plate is arranged in front of the baffle plate and on both sides of the beam splitter, which can avoid the influence of external light on the light emitted by the coaxial light source assembly, and enable stable propagation of the light, and the baffle plate and the coaxial light source assembly form a detection port of a camera lens, which facilitates the operation of the camera lens.

[0011] Further, the diffusion plate set includes a first diffusion plate and a second diffusion plate, the first diffusion plate is arranged at an angle of 45° between the two side plates, and the second diffusion plate is arranged in mirror symmetry with the first diffusion plate. By arranging two diffusion plates, the light emitted by the left and right side face array light source assemblies can be diffused respectively, so that the light cooperates with the light of the coaxial light source to form light intensity meeting the detection requirements.

[0012] Further, first, second and third clamping grooves for clamping the beam splitter, the first diffusion plate and the second diffusion plate are arranged on the two side plates, the first and second clamping grooves are arranged at an angle of 45°, and the third clamping groove is arranged in mirror symmetry with the second clamping groove. In this way, the beam splitter, the first diffusion plate and the second diffusion plate can be quickly and simply installed, different parameters of the beam splitter, the first diffusion plate and the second diffusion plate can be quickly replaced according to requirements to adapt to different requirements, the structure is simple and convenient to disassemble and assemble, and the practicability is high.

[0013] Further, the coaxial light source assembly includes a coaxial fixing seat, a coaxial circuit board and a diffusion plate, an open coaxial mounting cavity is arranged at the front end of the coaxial fixing seat, the coaxial circuit board is fixedly connected to the inner wall of the coaxial mounting cavity, a fourth clamping groove is formed in the position adjacent to the opening of the coaxial mounting cavity, and the diffusion plate is inserted into the fourth clamping groove.

[0014] Further, the first cooling structure is a first air passage arranged on the coaxial fixing seat, first air source quick connectors are connected to the two ends of the first air passage, and a plurality of first heat dissipation fins are arranged on the coaxial fixing seat. By connecting an air source to the first air source quick connectors, the air source in the external air source is caused to flow into the first air passage and exchange heat, and finally the completely exchanged air is discharged to realize the heat dissipation action of the coaxial fixing seat, so that the temperature of the linear light source is prevented from being too high, and the service life of the linear light source is improved.

[0015] Further, each group of the surface array linear light source assembly comprises a surface array fixing base, a first linear light source circuit board and a second linear light source circuit board, the first mounting portion is arranged in parallel with the first diffusion plate, the second mounting portion is arranged perpendicularly to the light outlet, the first linear light source circuit board is fixedly connected to the first mounting portion, and the second linear light source circuit board is fixedly connected to the second mounting portion. Through the arrangement of the first mounting portion and the second mounting portion, two linear light source circuit boards with different heights and angles can be installed on each group of the surface array linear light source assembly, the detection can be stably carried out in different illumination environments without being affected by illumination conditions, and external interference is reduced.

[0016] Further, the second cooling structure comprises a second air passage arranged on the first mounting portion and a third air passage arranged on the second mounting portion, and the first end and the second end of the second air passage are respectively connected with a second gas source quick connector, and the first end and the second end of the third air passage are respectively connected with a third gas source quick connector. Through the external connection of the second gas source quick connector and the third gas source quick connector, the gas in the second air passage and the third air passage can flow and exchange heat at the same time, and the gas completely exchanged in heat is discharged, so that the heat dissipation of the first mounting portion and the second mounting portion is realized, the temperature of the linear light source is prevented from being too high, and the service life of the linear light source is prolonged.

[0017] Further, a first bearing portion is arranged at the upper end of the surface array fixing base, the first bearing portion is provided with a bearing groove, a second bearing portion is arranged at the lower side of the surface array fixing base, and the second bearing portion abuts against the end portion of the diffusion plate group. The first bearing portion and the bearing groove can abut against the coaxial light source assembly and the baffle, and the second bearing portion can abut against the diffusion plate assembly, so that the mounting stability of each component is improved, the working stability is improved, the overall structure is optimized, and the cost is reduced.

[0018] Further, a plurality of second heat dissipation fins are arranged on the surface array fixing base. The heat dissipation effect of the surface array linear light source assembly is further improved, and the linear light source operation is more stable.

[0019] Compared with the prior art, the surface array linear light source assembly has the following advantages:

[0020] 1、the surface array linear light source assembly is composed of one coaxial light source and four surface array linear light sources, the light path is combined by a beam splitter and a diffusion plate group, five light sources are focused to the same position, stable detection can be carried out in different illumination environments without being affected by illumination conditions, external interference is reduced, high adaptability of the system is realized, different sizes and similar PCB boards can be applied, and the product high brightness and uniform detection requirements can be met.

[0021] 2、Further, the utility model discloses cooling structure is provided with on each light source, preferably cooling structure adopts air cooling heat dissipation mode heat dissipation, and the open mold mode is used to reduce the part processing to improve product competitiveness.

[0022] 3、The utility model discloses coaxial fixed seat and area array fixed seat all adopt the mode of open mold integrated molding to support, can effectively reduce manufacturing cost, improve product heat dissipation capacity. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0024] Figure 1 It is a structure schematic diagram of the PCB visual scratch detection combined light source of the utility model;

[0025] Figure 2 It is Figure 1 It is the section view along A-A line;

[0026] Figure 3 It is the structure schematic diagram of the side plate of the utility model;

[0027] Figure 4 It is the light path schematic diagram of the utility model.

[0028] In the drawing, including:

[0029] 1, side plate;11, first clamping groove;12, second clamping groove;13, third clamping groove;2, coaxial light source assembly;21, coaxial fixed seat;22, coaxial circuit board;23, diffuser plate;24, coaxial mounting cavity;25, fourth clamping groove;26, first heat dissipation through hole;27, first cooling structure;271, first air groove;272, first gas source quick connector;28, first heat dissipation fin;3, area array linear light source assembly;31, area array fixed seat;311, first mounting portion;312, second mounting portion;32, first linear light source circuit board;33, second linear light source circuit board;34, second heat dissipation through hole;35, second heat dissipation fin;36, second cooling structure;361, second air groove;362, third air groove;363, second gas source quick connector;364, third gas source quick connector;37, first bearing portion;371, bearing groove;38, second bearing portion;4, beam splitter;5, diffuser plate group;51, first diffuser plate;52, second diffuser plate;6, light path channel;7, light outlet;8, baffle, 81, five clamping grooves. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are merely some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are merely used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as described in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0032] In addition, if the present application embodiments involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are merely for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features.

[0033] Please refer to Figures 1 to 4 The embodiment of the present application provides a PCB visual scratch detection combined light source, which comprises two side plates 1, a coaxial light source assembly 2 and two groups of face array line light source assemblies 3.

[0034] The light splitting mirror 4 is arranged above the light path channel 6, and the light outlet 7 is arranged below the two side plates 1 and communicates with the light path channel 6. The diffusion plate set 5 in the embodiment includes a first diffusion plate 51 and a second diffusion plate 52, and the light path channel 6 is formed between the first diffusion plate 51 and the second diffusion plate 52. The first diffusion plate 51 is arranged between the two side plates 1 at an angle of 45°, and the second diffusion plate 52 is arranged in mirror symmetry with the first diffusion plate 51. The light splitting mirror 4, the first diffusion plate 51 and the second diffusion plate 52 are arranged between the two side plates 1 by plug-in connection. In order to reduce the overall cost and improve the installation simplicity of the components, the first clamping groove 11, the second clamping groove 12 and the third clamping groove 13 are arranged on the two side plates 1 for clamping the light splitting mirror 4, the first diffusion plate 51 and the second diffusion plate 52. The first clamping groove 11 and the second clamping groove 12 are arranged at an angle of 45°, and the third clamping groove 13 is arranged in mirror symmetry with the second clamping groove 12, so that the second clamping groove and the third clamping groove are arranged in an "eight" shape. During assembly, the light splitting mirror 4, the first diffusion plate 51 and the second diffusion plate 52 are directly inserted into the first clamping groove 11, the second clamping groove 12 and the third clamping groove 13, respectively. By pre-setting the angles of the first clamping groove 11, the second clamping groove 12 and the third clamping groove 13, the angles required by the light splitting mirror 4, the first diffusion plate 51 and the second diffusion plate 52 are directly achieved. Thus, the angles do not need to be adjusted during assembly, the installation efficiency is effectively improved, the accuracy of the angles is guaranteed, the stable output of the overall light source is improved, and the light emitted by the coaxial light source assembly 2 can be reflected by the light splitting mirror 4, pass through the light path channel 6 and enter the light outlet 7 to provide sufficient detection light source.

[0035] The baffle 8 is arranged on the other side of the coaxial light source assembly 2 relative to the light splitting mirror 4, and the fifth clamping groove 81 is arranged on the two side plates 1. The baffle 8 is directly plugged into the fifth clamping groove 81, so that the light emitted by the coaxial light source assembly 2 is not affected by external light, the stable propagation of the light is ensured, and the detection port 9 of the camera lens is formed together with the coaxial light source assembly 2 to cooperate with the operation of the camera lens.

[0036] The coaxial light source assembly 2 is detachably connected with the two side plates 1 at two ends, and is arranged on one side of the beam splitter 4 and opposite to the beam splitter 4. Specifically, the coaxial light source assembly 2 comprises a coaxial fixing seat 21, a coaxial circuit board 22 and a diffusion plate 23. The coaxial circuit board 22 is provided with LED lamp beads. The coaxial fixing seat 21 is provided with an open coaxial mounting cavity 24 at the front end. The coaxial circuit board 22 is fixedly connected to the inner wall of the coaxial mounting cavity 24. The coaxial mounting cavity 24 is provided with a fourth clamping groove 25 near the opening. The diffusion plate 23 is inserted into the fourth clamping groove 25. The coaxial fixing seat 21 of the embodiment is directly integrally formed by mold opening. The coaxial fixing seat 21 is fixed between the two side plates 1 by screws. A plurality of first heat dissipation through holes 26 are formed on the coaxial fixing seat 21 to improve the heat dissipation effect. In particular, the coaxial fixing seat 21 can be made of aluminum, copper or other metals or metal alloys with good heat dissipation effect. As a preferred mode, the coaxial fixing seat 21 is provided with a first cooling structure 27. The first cooling structure 27 is a first air groove 271 arranged on the coaxial fixing seat 21. The first air groove 271 is connected with a first gas source quick connector 272 at both ends. A plurality of first heat dissipation fins 28 are arranged on the coaxial fixing seat 21. The first gas source quick connector 272 is connected with an external gas source. The external gas source flows into the first air groove 271 and exchanges heat. Finally, the completely exchanged gas is discharged to realize the heat dissipation of the coaxial fixing seat 21, so that the temperature of the line light source is not too high, and the service life is improved.

[0037] The two ends of the above-mentioned area array line light source assembly 3 are detachably connected with the two side plates 1. The two groups of area array line light source assemblies 3 are arranged on the two sides of the first diffusion plate 51 and the second diffusion plate 52. Each group of area array line light source assemblies 3 in the embodiment comprises an area array fixing seat 31, a first line light source circuit board 32 and a second line light source circuit board 33. The first line light source circuit board 32 and the second line light source circuit board 33 are provided with LED lamp beads. The area array fixing seat 31 is provided with a first mounting portion 311 and a second mounting portion 312. The first mounting portion 311 is arranged in parallel with the first diffusion plate 51. The second mounting portion 312 is arranged perpendicularly to the light outlet 7. The first line light source circuit board 32 is fixedly connected to the first mounting portion 311. The second line light source circuit board 33 is fixedly connected to the second mounting portion 312. The first mounting portion 311 and the second mounting portion 312 can realize that each group of area array line light source assemblies 3 are provided with two line light source circuit boards with different heights and angles, are not affected by the light conditions, can stably detect in different light environments, and reduce external interference.

[0038] The surface array fixing base 31 is also directly integrally formed by mold opening, and is fixed between the two side plates 1 by screws, a plurality of second heat dissipation holes 34 are formed on the surface array fixing base 31, a plurality of groups of second heat dissipation fins 35 are arranged on the surface array fixing base 31 to improve the heat dissipation effect, and in particular, the surface array fixing base 31 can be made of aluminum, copper or other metals or metal alloys with good heat dissipation effect, and a second cooling structure 36 is arranged on the surface array fixing base 31, the second cooling structure 36 is a second air passage 361 arranged on the first mounting portion 311 and a third air passage 362 arranged on the second mounting portion 312, and the first end and the second end of the second air passage 361 are respectively connected with a second gas source quick connector 363, and the first end and the second end of the third air passage 362 are respectively connected with a third gas source quick connector 364. The second gas source quick connector 363 and the third gas source quick connector 364 are connected with an external gas source, so that the external gas source flows into the second air passage 361 and the third air passage 362 and exchanges heat at the same time, and finally the completely heat-exchanged gas is discharged to realize the heat dissipation of the first mounting portion 311 and the second mounting portion 312, so that the temperature of the linear light source is not too high, and the service life of the linear light source is improved.

[0039] As shown in Figure 2 A first bearing portion 37 is arranged at the upper end of the surface array fixing base 31, and a bearing groove 371 is arranged on the first bearing portion 37, and a second bearing portion 38 is arranged at the lower side of the surface array fixing base 31 and abuts against the end portion of the diffusion plate group 5. The first bearing portion 37 and the bearing groove 371 can abut against the coaxial light source assembly 2 and the baffle 8, and the second bearing portion 38 can abut against the diffusion plate group 5, so that the mounting stability of each component is improved, the work stability is improved, the overall structure is optimized, and the cost is reduced.

[0040] The working principle of the utility model is briefly described, the utility model integrally forms the coaxial fixing base 21 and the surface array fixing base 31 by mold opening, and forms heat dissipation holes and heat dissipation fins on the coaxial fixing base 21 and the surface array fixing base 31, so that the manufacturing cost is reduced and the product heat dissipation capacity is improved. In particular, the cooling structure can realize air cooling of the coaxial fixing base 21 and the surface array fixing base 31, so that the overall heat dissipation effect is better, as shown in Figure 4As shown, during operation, an external air source is first connected to the first and second cooling structures 36 to enable them to communicate with the cooling air source. The light emitted from the coaxial light source assembly 2 passes through the beam splitter 4 and is reflected by the light path channel 6 formed between the first diffuser plate 51 and the second diffuser plate 52, entering the light outlet 7. The two line light sources on the left-side area array line light source assembly 3 are focused onto the light outlet 7 through the first diffuser plate 51, and the two line light sources on the right-side area array line light source assembly 3 are focused onto the light outlet 7 through the second diffuser plate 52. This achieves the combination of one coaxial light source and four area array line light sources, enabling the five light sources to be focused at the same position, unaffected by lighting conditions, and able to perform stable detection under different lighting environments, reducing external interference. When in use, simply point the camera lens at the entrance and then turn on each group of light sources as needed.

[0041] 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 combined light source for PCB visual scratch detection, characterized in that, It includes two side panels (1), a coaxial light source assembly (2), and two sets of area array light source assemblies (3); A beam splitter (4) and a diffuser plate group (5) are detachably connected between the two side plates (1). An optical path channel (6) is formed between the diffuser plate group (5). The beam splitter (4) is located directly above the optical path channel (6). A light outlet (7) communicating with the optical path channel (6) is provided below the two side plates (1). The two ends of the coaxial light source assembly (2) are detachably connected to the two side plates (1), and the coaxial light source assembly (2) is placed on one side of the beam splitter (4) and directly opposite the beam splitter (4); The two ends of the area array light source assembly (3) are detachably connected to the two side plates (1), and the two sets of area array light source assemblies (3) are respectively disposed on both sides of the diffuser plate assembly (5); A first cooling structure (27) and a second cooling structure (36) are respectively provided on the coaxial light source assembly (2) and the area array light source assembly (3).

2. The PCB visual scratch detection combined light source according to claim 1, characterized in that, A baffle (8) is provided on the other side of the beam splitter (4) opposite to the coaxial light source assembly (2).

3. The PCB visual scratch detection combined light source according to claim 1, characterized in that, The diffuser plate assembly (5) includes a first diffuser plate (51) and a second diffuser plate (52). The first diffuser plate (51) is inclined at 45° between the two side plates (1), and the second diffuser plate (52) is mirror-symmetrically arranged with respect to the first diffuser plate (51).

4. The PCB visual scratch detection combined light source according to claim 3, characterized in that, On the two side plates (1), there are a first snap-fit ​​groove (11), a second snap-fit ​​groove (12) and a third snap-fit ​​groove (13) for snapping the beam splitter (4), the first diffuser plate (51) and the second diffuser plate (52). The first snap-fit ​​groove (11) and the second snap-fit ​​groove (12) are both set at 45°. The third snap-fit ​​groove (13) is mirror-symmetrical to the second snap-fit ​​groove (12).

5. The PCB visual scratch detection combined light source according to claim 4, characterized in that, The coaxial light source assembly (2) includes a coaxial mounting base (21), a coaxial circuit board (22), and a diffuser plate (23). An open coaxial mounting cavity (24) is provided at the front end of the coaxial mounting base (21). The coaxial circuit board (22) is fixed to the inner wall of the coaxial mounting cavity (24). A fourth snap-fit ​​groove (25) is provided near the opening of the coaxial mounting cavity (24). The diffuser plate (23) is inserted into the fourth snap-fit ​​groove (25).

6. The PCB visual scratch detection combined light source according to claim 5, characterized in that, The first cooling structure (27) is a first venting groove (271) disposed on the coaxial mounting base (21). The first venting groove (271) is connected to a first air source quick connector (272) at both ends. Multiple sets of first heat dissipation fins (28) are disposed on the coaxial mounting base (21).

7. The PCB visual scratch detection combined light source according to claim 3, characterized in that, Each array line light source assembly (3) includes an array mounting base (31), a first line light source circuit board (32), and a second line light source circuit board (33). A first mounting part (311) and a second mounting part (312) are provided on the array mounting base (31). The first mounting part (311) is arranged parallel to the first diffuser plate (51), and the second mounting part (312) is arranged perpendicular to the light outlet (7). The first line light source circuit board (32) is fixed to the first mounting part (311), and the second line light source circuit board (33) is fixed to the second mounting part (312).

8. The PCB visual scratch detection combined light source according to claim 7, characterized in that, The second cooling structure (36) consists of a second venting groove (361) on the first mounting part (311) and a third venting groove (362) on the second mounting part (312). A second air source quick connector (363) is connected to both ends of the second venting groove (361), and a third air source quick connector (364) is connected to both ends of the third venting groove (362).

9. A combined light source for PCB visual scratch detection according to claim 8, characterized in that, A first bearing portion (37) is provided at the upper end of the array fixing base (31), and a bearing groove (371) is provided on the first bearing portion (37). A second bearing portion (38) is provided on the lower side of the array fixing base (31), and the second bearing portion (38) abuts against the end of the diffuser plate assembly (5).

10. A combined light source for PCB visual scratch detection according to claim 7, characterized in that, Multiple sets of second heat dissipation fins (35) are provided on the array mounting base (31).

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