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

Abstract

The utility model discloses a PCB visual blind hole detection combined light source, comprising a light source housing, an installation space is formed in the light source housing, and a light outlet communicated with the installation space is arranged below the light source housing; the two groups of linear light sources are symmetrically arranged above the light outlet, the two groups of linear light sources are movably arranged on the light source shell at an angle, and Fresnel lenses are arranged on the two groups of linear light sources; the spectroscope is inserted into the light source shell, and the spectroscope is arranged at the interval between the two groups of linear light sources; the coaxial light source is arranged on one side of the spectroscope and directly faces the spectroscope; and cooling structures are arranged on the two groups of linear light sources and the coaxial light source. The high-brightness requirement of a product is met, an air cooling heat dissipation mode is adopted for heat dissipation, and a mold opening mode is adopted for improving the competitiveness of the product, so that the material processing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection light sources, in particular to a combined light source for PCB visual blind hole detection. Background Art

[0002] PCB visual inspection combined light source is a special one in PCB visual inspection. The heat dissipation method adopts air cooling. The light source is mainly composed of light source housing, circuit board, LED lamp beads, power cord, thermal conductive material and air cooling structure.

[0003] In the wave of miniaturization of modern electronic devices, PCB printed circuit boards play a core role. As a connecting bridge between electronic components, PCB design and manufacturing technology continue to evolve to meet the needs of increasingly complex circuits. Among them, blind via technology is a key component of high-density interconnect (HDI) PCB technology, which not only optimizes space utilization, but also improves signal transmission efficiency.

[0004] There are many defect detection features for PCB blind holes, including micropore size of 0.15mm±0.025mm, micropore openings not allowing sealing, thickness of the accumulated layers being corroded, high shell cost and poor heat dissipation effect. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned defects in the prior art, provide a PCB visual blind hole detection combined light source, meet the high brightness requirements of the product, adopt air cooling to dissipate heat, and adopt mold opening to reduce material processing costs in order to enhance product competitiveness.

[0006] To achieve the above purpose, the utility model provides a PCB visual blind hole detection combined light source, including:

[0007] A light source housing, wherein an installation space is formed inside the light source housing, and a light outlet communicating with the installation space is provided below the light source housing;

[0008] Two groups of linear light sources are symmetrically arranged above the light outlet, the two groups of linear light sources are movably arranged at an angle on the light source housing, and the two groups of linear light sources are both provided with Fresnel lenses;

[0009] A beam splitter plugged into the light source housing, the beam splitter being arranged at a distance between the two groups of linear light sources;

[0010] A coaxial light source is arranged on one side of the beam splitter, the coaxial light source is directly opposite to the beam splitter, and the light emitted by the coaxial light source is focused at the same position as the light emitted by the two groups of linear light sources after passing through the beam splitter;

[0011] The two groups of linear light sources and the coaxial light source are both provided with cooling structures.

[0012] Furthermore, the light source housing includes two side plates and a top plate fixedly connected to the two side plates. The modular assembly of the light source housing is realized through the two side plates and the top plate, reducing the production cost.

[0013] Furthermore, inclined first mounting grooves are provided on the inner sides of the two side plates, and both ends of the beam splitter are inserted into the first mounting grooves. A clamping through groove for clamping the beam splitter is provided on the top plate. Installing the beam splitter by clamping is quick, convenient and can reduce costs.

[0014] Furthermore, first mounting holes for installing the linear light source are also provided on the two side plates, and the first mounting holes are arc-shaped inclined holes. The light emission angle of the linear light source can be adjusted through the first mounting holes.

[0015] Furthermore, second mounting holes are also provided on the two side plates. The second mounting holes are located above the first mounting holes, and the radian of the second mounting holes is greater than that of the first mounting holes. The light emission angle of the linear light source can be adjusted through the second mounting holes, and at the same time, the linear light can be fixed more stably.

[0016] Furthermore, a second mounting groove is provided on the top plate, and an observation window is provided on the second mounting groove. By providing the observation window, the operation conditions inside the light source housing can be observed intuitively.

[0017] Furthermore, the cooling structure includes a first pneumatic connector and a second pneumatic connector respectively connected to the coaxial light source and the linear light source, and the first pneumatic connector and the second pneumatic connector are externally connected to a cooling air source. The external cooling air source is used to perform heat exchange cooling on the coaxial light source and the two groups of linear light sources.

[0018] Furthermore, the coaxial light source includes a first fixing seat and a first light source and a lens disposed in the first fixing seat. A first heat dissipation through hole penetrating the first fixing seat is provided on the first fixing seat, and both ends of the first heat dissipation through hole are connected to the first pneumatic connector, and the first light source is adjacent to the first heat dissipation through hole. Connecting through the first heat dissipation hole to the first pneumatic connector enables the gas of the cooling air source to flow inside the second fixing seat, thereby realizing heat exchange cooling.

[0019] Furthermore, the linear light source includes a second fixing seat and a second light source disposed in the second fixing seat. A second heat dissipation through hole is provided on the second fixing seat, and both ends of the second heat dissipation through hole are connected to the second pneumatic connector. Connecting through the second heat dissipation hole to the second pneumatic connector enables the gas of the cooling air source to flow inside the second fixing seat, thereby realizing heat exchange cooling.

[0020] Further, both the first fixing seat and the second fixing seat are made of metal heat-conducting materials.

[0021] Compared with the prior art, the utility model has the following advantages: The utility model adopts a multi-light source combination, including a coaxial light source and two groups of linear light sources. The optical path uses a multi-angle Fresnel lens combination and a beam splitter for the coaxial light source to focus the three light sources on the same position to meet the high-brightness requirements of the product. In particular, the utility model uses an air-cooling heat dissipation method, and adopts a mold-opening method to reduce the material processing cost to enhance the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of a PCB vision blind hole detection combined light source of the present utility model;

[0024] Figure 2 is Figure 1 a schematic structural diagram of removing one side plate in;

[0025] Figure 3 is a schematic structural diagram of the top plate of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the side plate of the present utility model;

[0027] Figure 5 is Figure 1 a schematic cross-sectional view of the A-A line in.

[0028] In the figure, it includes:

[0029] 1. Light source housing; 11. Side plate; 111. First mounting hole; 112. Second mounting hole; 113. First mounting groove; 114. Insertion port; 12. Top plate; 121. Second mounting groove; 122. Clamping through groove; 13. Observation window; 14. Light outlet; 15. Installation space; 2. Linear light source; 21. Second fixing seat; 211. Second heat dissipation through hole; 22. Second light source; 3. Beam splitter; 4. Coaxial light source; 41. First fixing seat; 411. First installation cavity; 412. Third mounting groove; 413. First heat dissipation through hole; 42. First light source; 43. Lens; 5. Cooling structure; 51. First pneumatic connector; 52. Second pneumatic connector; 6. Fresnel lens. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, in combination with the drawings in this embodiment of the present utility model, the technical solutions in this embodiment of the present utility model will be clearly and completely described. Obviously, the described embodiment is one embodiment of the present utility model, rather than all embodiments. Based on this embodiment of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

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

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features.

[0033] Please refer to Figures 1 to 5 , an embodiment of the present utility model provides a PCB vision blind hole detection combined light source, including: a light source housing 1, a linear light source 2, a beam splitter 3, a coaxial light source 4, and a cooling structure 5:

[0034] As Figures 1 - 5 shown, the above-mentioned light source housing 1 includes two side plates 11 and a top plate 12 fixedly connected to the two side plates 11. A second installation groove 121 is opened on the top plate 12, and an observation window 13 is provided on the second installation groove 121. An installation space 15 is formed inside the light source housing 1, and a light outlet 14 communicating with the installation space 15 is provided below the light source housing 1;

[0035] In this embodiment, a total of two groups of linear light sources 2 are provided. The two groups of linear light sources 2 are symmetrically arranged above the light outlet 14, and Fresnel lenses 6 are provided on both groups of linear light sources 2. The Fresnel lenses 6 in this embodiment adopt multi-angle Fresnel lenses, so as to cooperate with the linear light sources 2 to focus light at different angles. To facilitate the adjustment of the angle of the linear light source 2, specifically, each group of linear light sources 2 includes a second fixing seat 21 and a second light source 22 arranged inside the second fixing seat 21. The second fixing seat 21 is made of a metal material with good heat conduction performance such as aluminum or aluminum alloy. The second light source 22 is fixedly connected to the second fixing seat 21. The above-mentioned Fresnel lens 6 is arranged outside the second light source 22, so that the light emitted by the second light source 22 can be focused through the Fresnel lens 6; The two groups of linear light sources 2 in this embodiment are both arranged on the light source housing 1 at an angle and can move. Specifically, asFigure 4 As shown, first mounting holes 111 for mounting the linear light source 2 are further provided on the two side panels 11. The first mounting holes 111 are arc-shaped inclined holes, so that the linear light source 2 can be fixed to the first mounting holes 111 by bolts and other parts, and the lateral direction of the light emitted by the linear light source 2 can be adjusted by fixing at different positions; in order to ensure the stability of the installation of the linear light source 2, second mounting holes 112 are further provided on the side panels 11, and the second mounting holes 112 are placed above the first mounting holes 111. The curvature of the second mounting holes 112 is greater than that of the first mounting holes 111. The linear light source 2 can be installed by two groups of first mounting holes 111 and second mounting holes 112 with different curvatures.

[0036] like Figures 3 to 5 As shown, the beam splitter 3 is plugged into the two side plates 11, and the beam splitter 3 is placed above the gap between the first linear light source 2 and the second linear light source 2. Specifically, an inclined first mounting groove 113 is provided on the inner side of the two side plates 11, and the first mounting groove 113 is inclined at 45 degrees, and one side of the first mounting groove 113 is closed, and the other side is provided with an insertion port 114, and the two ends of the beam splitter 3 are plugged into the first mounting groove 113 through the insertion port 114, and a fixing through groove 122 for fixing the beam splitter 3 is provided on the top plate 12, and after the beam splitter 3 is inserted into the first mounting groove 113, the fixing groove can just support the end of the beam splitter 3 to fix it so that it does not shake.

[0037] The coaxial light source 4 is arranged on one side of the spectroscope 3, the coaxial light source 4 is directly opposite to the spectroscope 3, and the light emitted by the coaxial light source 4 is focused on the same position with the light emitted by the two groups of linear light sources 2 after passing through the spectroscope 3. The coaxial light source 4 includes a first fixed seat 41 and a first light source 42 and a lens 43 arranged in the first fixed seat 41. The first fixed seat 41 is made of a metal material with good thermal conductivity such as aluminum or aluminum alloy, and a first mounting cavity 411 is formed inside the first fixed seat 41. The above-mentioned first light source 42 is fixedly connected to the inside of the first mounting cavity 411. The other side of the first mounting cavity 411 away from the first light source 42 is the light outlet of the coaxial light source 4, and a third mounting groove 412 is provided on the inner wall of this side. As shown in the figure, in this embodiment, a total of two third mounting grooves 412 are provided, and a lens 43 is inserted into each third mounting groove 412.

[0038] A cooling structure 5 is provided on each of the first linear light source 2, the second linear light source 2, and the coaxial light source 4. The cooling structure 5 includes a first pneumatic connector 51 and a second pneumatic connector 52 respectively connected to the coaxial light source 4 and the linear light source 2, and the first pneumatic connector 51 and the second pneumatic connector 52 are externally connected to a cooling gas source; a first heat dissipation through hole 413 penetrating the first fixing seat 41 is provided on the first fixing seat 41, and both ends of the first heat dissipation through hole 413 are connected to the first pneumatic connector 51. In order to increase the heat dissipation effect on the first light source 42, in this embodiment, the first light source 42 is adjacent to the first heat dissipation through hole 413; a second heat dissipation through hole 211 is provided on the second fixing seat 21, and both ends of the second heat dissipation through hole 211 are connected to the second pneumatic connector 52.

[0039] Brief description of the working principle of the present utility model: When the present utility model is in use, the first pneumatic connector 51, the second pneumatic connector 52, and the third pneumatic connector need to be externally connected to a cooling gas source first. The cooling gas source can be provided by a conventional gas source system. Of course, nitrogen or the like can also be selected as the cooling gas source according to needs. During operation, the gas of the cooling gas source can flow in the first fixing seat 41 and the second fixing seat 21 through the first pneumatic connector 51, the second pneumatic connector 52, and the third pneumatic connector. The gas exchanges heat with the first fixing seat 41 and the second fixing seat 21, thereby realizing the cooling effect on the first fixing seat 41 and the second fixing seat 21; then the coaxial power supply and the two groups of linear light sources 2 can be turned on. The coaxial light source 4 cooperates with the beam splitter 3 arranged at 45° to realize the reflection of light to the light outlet 14. The two groups of linear light sources 2 can fine-tune the angle of light concentration through the first mounting hole 111 and the second mounting hole 112, so that the emitted light of the coaxial light source 4 and the two linear light sources 2 can be focused on the same position, meeting the high-brightness requirement of the product. The air-cooling heat dissipation method is adopted for heat dissipation, and the mold opening method is adopted to reduce the material processing cost to enhance the product competitiveness.

[0040] The above is only the preferred embodiment of the present utility model and is not used to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A PCB visual blind hole detection combined light source, characterized in that: include: A light source housing (1), wherein an installation space (15) is formed inside the light source housing (1), and a light outlet (14) communicating with the installation space (15) is provided below the light source housing (1); Two groups of linear light sources (2) are symmetrically arranged above the light outlet (14), the two groups of linear light sources (2) are movably arranged at an angle on the light source housing (1), and the two groups of linear light sources (2) are both provided with Fresnel lenses (6); A beam splitter (3) inserted into the light source housing (1), wherein the beam splitter (3) is arranged above the interval between the two groups of linear light sources (2); a coaxial light source (4) disposed on one side of the beam splitter (3), the coaxial light source (4) facing the beam splitter (3), and the light emitted by the coaxial light source (4) and the light emitted by the two groups of linear light sources (2) are focused at the same position after passing through the beam splitter (3); The two groups of linear light sources (2) and the coaxial light source (4) are both provided with cooling structures (5).

2. The PCB visual blind hole detection combined light source according to claim 1, characterized in that: The light source housing (1) comprises two side plates (11) and a top plate (12) fixedly connected to the two side plates (11).

3. The PCB visual blind hole detection combined light source according to claim 2, characterized in that: The inner sides of the two side plates (11) are provided with first installation grooves (113) arranged obliquely, the two ends of the beam splitter (3) are inserted into the first installation grooves (113), and the top plate (12) is provided with a fixing through groove (122) for fixing the beam splitter (3).

4. The PCB visual blind hole detection combined light source according to claim 3, characterized in that: The two side plates (11) are also provided with first mounting holes (111) for mounting the linear light source (2), and the first mounting holes (111) are arc-shaped inclined holes.

5. The PCB visual blind hole detection combined light source according to claim 2, characterized in that: A second mounting hole (112) is also provided on the two side plates (11), the second mounting hole (112) is located above the first mounting hole (111), and the curvature of the second mounting hole (112) is greater than that of the first mounting hole (111).

6. The PCB visual blind hole detection combined light source according to claim 2, characterized in that: A second installation groove (121) is provided on the top plate (12), and an observation window (13) is provided on the second installation groove (121).

7. The PCB visual blind hole detection combined light source according to claim 1, characterized in that: The cooling structure (5) comprises a first pneumatic connector (51) and a second pneumatic connector (52) respectively connected to the coaxial light source (4) and the linear light source (2); the first pneumatic connector (51) and the second pneumatic connector (52) are externally connected to a cooling air source.

8. The PCB visual blind hole detection combined light source according to claim 7, characterized in that: The coaxial light source (4) comprises a first fixing seat (41), a first light source (42) and a lens (43) arranged in the first fixing seat (41); the first fixing seat (41) is provided with a first heat dissipation through hole (413) penetrating the first fixing seat (41); both ends of the first heat dissipation through hole (413) are connected to a first pneumatic connector (51); and the first light source (42) is adjacent to the first heat dissipation through hole (413).

9. The PCB visual blind hole detection combined light source according to claim 8, characterized in that: The linear light source (2) comprises a second fixing seat (21) and a second light source (22) arranged in the second fixing seat (21); a second heat dissipation through hole (211) is arranged on the second fixing seat (21); both ends of the second heat dissipation through hole (211) are connected to a second pneumatic connector (52).

10. The PCB visual blind hole detection combined light source according to claim 9, characterized in that: The first fixing seat (41) and the second fixing seat (21) are both made of metal heat-conducting material.

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