Flexible circuit board defect detection light source

Abstract

The utility model discloses a flexible circuit board defect detection light source, which relates to the technical field of circuit board detection and comprises a shell, a fixing ring is fixedly mounted at the top of the shell, a round hole penetrating through the fixing ring is formed in the middle of the fixing ring, and the top end of the fixing ring is flush with the top end of the shell. A high-angle ring light assembly is fixedly installed at the bottom end of the fixing ring and located at the upper position in the shell, and a UV light source assembly is fixedly installed at the bottom of the high-angle ring light assembly. According to the defect detection light source for the flexible circuit board, the high-angle ring light assembly, the UV light source assembly and the low-angle ring light assembly are combined for use, so that respective advantages can be fully utilized, a complementary effect is realized, defect types on the surface of the circuit board can be covered more comprehensively, the detection efficiency is improved, and the detection cost is reduced. And the detection error and omission ratio possibly caused by a single light source are reduced, so that the detection light source can adapt to various application scenes and production line requirements.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to a light source for detecting defects in flexible circuit boards. Background Technology

[0002] A flexible printed circuit board (FPC) is a type of printed circuit made from a flexible insulating substrate. It is also known as a flexible board or flexible circuit board. The FPC defect detection light source is an essential piece of equipment in the FPC production process, designed to provide sufficient illumination to clearly identify and detect various defects on the circuit board.

[0003] Existing flexible circuit board defect detection light sources mainly include a housing, a fixing ring, and a ring light. In use, the ring light is used to illuminate the circuit board for detection. However, in actual use, the defects of circuit boards are diverse, and using a single detection light source has great limitations in detecting flexible circuit boards. It may miss some types of defects, thereby reducing the reliability of the detection results.

[0004] Therefore, a flexible circuit board defect detection light source is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, since there are many types of defects in circuit boards, using a single type of detection light source for the inspection of flexible circuit boards has significant limitations and may miss some types of defects, thereby reducing the reliability of the inspection results. Therefore, a defect detection light source for flexible circuit boards is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a flexible circuit board defect detection light source, including a housing, a fixing ring fixedly installed on the top of the housing, a circular hole penetrating the fixing ring in the middle of the fixing ring, and the top of the fixing ring being flush with the top of the housing.

[0007] Preferably, a high-angle ring light component is fixedly installed at the bottom end of the fixing ring, and the high-angle ring light component is located at an upper position inside the housing.

[0008] Preferably, a UV light source assembly is fixedly installed at the bottom of the high-angle ring light assembly, and the UV light source assembly is located at the upper part of the middle of the inner wall of the housing.

[0009] Preferably, a connector is fixedly installed at the bottom of the UV light source assembly, and a connecting ring is sleeved on the outside of the connector. Both the outer wall of the connector and the outer wall of the connecting ring are provided with threaded holes, and screws are threaded into the internal threads of the threaded holes. The connecting ring is located at the lower part of the middle of the inner wall of the outer shell.

[0010] Preferably, a low-angle ring light component is fixedly installed at the bottom of the connecting ring, the bottom end of the low-angle ring light component is flush with the bottom end of the outer shell, and the low-angle ring light component is located in the lower part of the outer shell.

[0011] Preferably, the top view of the high-angle ring light assembly, the UV light source assembly, the low-angle ring light assembly, and the connector is annular, and the diameter of the inner ring of the high-angle ring light assembly, the UV light source assembly, the low-angle ring light assembly, and the connector is the same as the diameter of the circular hole.

[0012] Preferably, the outer wall of the housing has a slot that penetrates the housing, a light source output line one is fixedly installed on one side of the high-angle ring light component, and a light source output line two is fixedly connected to the outer wall of the low-angle ring light component. The output ends of the first light source output line and the second light source output line both pass through the slot and exit the outer wall of the housing.

[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0014] 1. This utility model provides a flexible circuit board defect detection light source. By combining a high-angle ring light component, a UV light source component, and a low-angle ring light component, the advantages of each component can be fully utilized to achieve a complementary effect. This can more comprehensively cover the types of defects on the circuit board surface, improve detection efficiency, reduce detection errors and missed detection rates that may be caused by a single light source, and thus enable the detection light source to adapt to various application scenarios and production line requirements.

[0015] 2. This utility model provides a light source for detecting defects in flexible circuit boards. By setting the high-angle ring light component, UV light source component, and low-angle ring light component into a ring shape, the three components can provide a more uniform ring light source. The ring light can provide uniform and soft illumination, illuminating the flexible circuit board from multiple angles, creating a clear contrast between the defective parts and the normal parts, highlighting the minor defects on the circuit board surface, such as scratches, bubbles, and cracks, thereby improving the accuracy of detection. At the same time, it reduces the generation of shadows and reduces the interference of reflections on the detection results, making the detection clearer and more accurate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting component structure of this utility model.

[0019] In the diagram: 1. Outer shell; 2. Fixing ring; 3. Groove; 4. High-angle ring light assembly; 5. Light source outlet one; 6. UV light source assembly; 7. Connecting ring; 8. Low-angle ring light assembly; 9. Light source outlet two; 10. Circular hole; 11. Connector. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Specific implementation examples are given below.

[0022] Please see Figure 1 - Figure 3 This utility model provides a technical solution: a flexible circuit board defect detection light source, including a housing 1, a fixing ring 2 fixedly installed on the top of the housing 1, a circular hole 10 penetrating the fixing ring 2 in the middle of the fixing ring 2, and the top of the fixing ring 2 being flush with the top of the housing 1. The housing 1 and the fixing ring 2 can provide a certain degree of protection for the high-angle ring light assembly 4, the UV light source assembly 6 and the low-angle ring light assembly 8. At the same time, it can make the flexible circuit board defect detection light source as a whole have a certain degree of waterproof, dustproof and anti-interference capabilities.

[0023] like Figure 2 As shown, a high-angle ring light component 4 is fixedly installed at the bottom of the fixed ring 2. The high-angle ring light component 4 is located in the upper part of the housing 1. When light shines on the circuit board at a high angle, the circuit itself will appear as a darker area, while the defects will appear as brighter or darker areas due to the change in the angle of light, which helps the image processing algorithm to identify defects more accurately.

[0024] like Figure 3 As shown, a UV light source assembly 6 is fixedly installed at the bottom of the high-angle ring light assembly 4. The UV light source assembly 6 is located in the upper part of the middle of the inner wall of the housing 1. In the flexible circuit board, paints, plastics or printing inks with added fluorescent whitening agents may be used. When these fluorescent materials are irradiated by the UV light source assembly 6, they will absorb ultraviolet radiation and emit fluorescence with a longer wavelength. Through ultraviolet-fluorescence imaging technology, the distribution and state of these fluorescent materials can be clearly observed, thereby detecting tiny defects, contamination or traces on the surface of the circuit board, and further improving the detection effect.

[0025] like Figure 2 and Figure 3As shown, a connector 11 is fixedly installed at the bottom of the UV light source assembly 6. A connecting ring 7 is sleeved on the outside of the connector 11. Threaded holes are opened on the outer walls of both the connector 11 and the connecting ring 7. Screws are connected to the threads inside the threaded holes. The connecting ring 7 is located at the lower part of the middle of the inner wall of the outer shell 1. Through the action between the connector 11 and the connecting ring 7, the outer shell 1, the UV light source assembly 6, and the low-angle ring light assembly 8 can be further fixed, thereby improving the overall stability of the flexible circuit board defect detection light source structure.

[0026] like Figure 2 As shown, a low-angle ring light assembly 8 is fixedly installed at the bottom of the connecting ring 7. The bottom end of the low-angle ring light assembly 8 is flush with the bottom end of the housing 1. The low-angle ring light assembly 8 is located in the lower part of the housing 1. The low-angle ring light assembly 8 can illuminate the circuit board from a lower angle, so that the defective part and the normal part form a clear contrast, making it easier to detect.

[0027] like Figure 3 As shown, the top view of the high-angle ring light assembly 4, UV light source assembly 6, low-angle ring light assembly 8, and connector 11 are all annular, and the diameter of the inner ring of the high-angle ring light assembly 4, UV light source assembly 6, low-angle ring light assembly 8, and connector 11 is the same as the diameter of the circular hole 10. The fact that the high-angle ring light assembly 4, UV light source assembly 6, and low-angle ring light assembly 8 are all annular provides a more uniform ring light source. The ring light can provide uniform and soft illumination, illuminating the flexible circuit board from multiple angles, creating a clear contrast between the defective parts and the normal parts, highlighting the minor defects on the circuit board surface, such as scratches, bubbles, and cracks, thereby improving the accuracy of detection. At the same time, it reduces the generation of shadows and reduces the interference of reflections on the detection results, making the detection clearer and more accurate.

[0028] like Figure 1 and Figure 3 As shown, the outer wall of the housing 1 has a slot 3 that penetrates the housing 1. A light source output line 5 is fixedly installed on one side of the high-angle ring light assembly 4. A light source output line 9 is fixedly connected to the outer wall of the low-angle ring light assembly 8. The output ends of the light source output line 5 and the light source output line 9 both pass through the slot 3 and exit the outer wall of the housing 1. The light source output line 5 and the light source output line 9 work together to provide power to the entire light source for detecting defects in flexible circuit boards. By opening the slot 3, it is easier to arrange the wiring of the light source output line 5 and the light source output line 9, making the overall structure more rationally distributed.

[0029] The working principle of this utility model is as follows: In use, light source output line 5 and light source output line 9 are connected to an external power supply system through slot 3, thereby powering the high-angle ring light component 4, UV light source component 6, and low-angle ring light component 8 inside the flexible circuit board defect detection light source. Then, the flexible circuit board is passed through the circular hole 10 of the fixing plate from top to bottom through the flexible circuit board defect detection light source. When the flexible circuit board passes through the high-angle ring light component 4, the high-angle ring light component 4 uses its high-angle illumination method to make the circuit itself appear as a darker area, while the defect appears as a brighter or darker area due to the change in the angle of light illumination. This contrasts the circuit and the defect, helping the image processing algorithm to more accurately identify the defect. When the flexible circuit board passes through the UV light source component 6, ultraviolet-fluorescence imaging technology can clearly observe the coating, plastic, or other materials with added fluorescent whitening agents on the surface of the flexible circuit board. The distribution and state of the printing ink are used to detect minute defects, contamination, or marks on the surface of the circuit board. When the flexible circuit board passes through the low-angle ring light assembly 8, the low-angle ring light assembly 8 can illuminate the circuit board from a lower angle, creating a clear contrast between the defective parts and the normal parts, making them easier to detect. The high-angle ring light assembly 4, the UV light source assembly 6, and the low-angle ring light assembly 8 are three different light sources that use a ring illumination method to detect the flexible circuit board. This allows the three to provide a more uniform ring light source. The ring light can provide uniform and soft illumination, illuminating the flexible circuit board from multiple angles, creating a clear contrast between the defective parts and the normal parts, highlighting minute defects on the circuit board surface, such as scratches, bubbles, cracks, etc., thereby improving the accuracy of detection. At the same time, it reduces the generation of shadows and reduces the interference of reflections on the detection results, making the detection clearer and more accurate.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible circuit board defect detection light source, comprising a housing (1), characterized in that: A fixing ring (2) is fixedly installed on the top of the outer shell (1). A circular hole (10) is opened in the middle of the fixing ring (2) and the top of the fixing ring (2) is flush with the top of the outer shell (1).

2. The flexible circuit board defect detection light source according to claim 1, characterized in that: A high-angle ring light assembly (4) is fixedly installed at the bottom end of the fixed ring (2), and the high-angle ring light assembly (4) is located at the upper part of the shell (1).

3. The flexible circuit board defect detection light source according to claim 2, characterized in that: The bottom of the high-angle ring light assembly (4) is fixedly installed with a UV light source assembly (6), which is located in the upper part of the middle of the inner wall of the outer shell (1).

4. The flexible circuit board defect detection light source according to claim 3, characterized in that: A connector (11) is fixedly installed at the bottom of the UV light source assembly (6). A connecting ring (7) is sleeved on the outside of the connector (11). Threaded holes are opened on the outer wall of the connector (11) and the outer wall of the connecting ring (7). Screws are threaded into the inside of the threaded holes. The connecting ring (7) is located at the lower part of the middle of the inner wall of the outer shell (1).

5. The flexible circuit board defect detection light source according to claim 4, characterized in that: A low-angle ring light assembly (8) is fixedly installed at the bottom of the connecting ring (7). The bottom end of the low-angle ring light assembly (8) is flush with the bottom end of the outer shell (1). The low-angle ring light assembly (8) is located in the lower part of the outer shell (1).

6. The flexible circuit board defect detection light source according to claim 5, characterized in that: The top view of the high-angle ring light assembly (4), UV light source assembly (6), low-angle ring light assembly (8) and connector (11) are all circular, and the diameter of the inner ring of the high-angle ring light assembly (4), UV light source assembly (6), low-angle ring light assembly (8) and connector (11) is the same as the diameter of the circular hole (10).

7. The flexible circuit board defect detection light source according to claim 5, characterized in that: The outer wall of the outer shell (1) is provided with a slot (3) that penetrates the outer shell (1). A light source output line one (5) is fixedly installed on one side of the high-angle ring light assembly (4). A light source output line two (9) is fixedly connected to the outer wall of the low-angle ring light assembly (8). The output ends of the light source output line one (5) and the output ends of the light source output line two (9) both pass through the slot (3) and exit the outer wall of the outer shell (1).

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