An inspection fixture

Abstract

The utility model relates to detection jig technical field, propose a kind of detection jig, solve the problem that FPC self-possessed two-dimensional code size is smaller, and existing power measurement equipment cannot scan and identify. Including jig upper die and the jig lower die for fixing product, its characterized in that, the jig upper die includes upper die frame, scanning gun and the upper die branch plate for installing scanning gun;The surface of the upper die frame is equipped with test area for placing FPC to be measured, and the upper die branch plate is located in the upper die frame upper portion, and window is opened in the upper portion of test area, to facilitate scanning gun scanning code.

Description

Technical Field

[0001] This utility model relates to the field of FPC testing fixture technology, specifically, to a testing fixture. Background Technology

[0002] Traditional FPC traceability methods typically employ two techniques: QR code stickers or inkjet-printed QR codes. However, both methods require additional sticker and printing processes, leading to increased complexity and costs. Furthermore, sticker-type QR codes are susceptible to the dynamic bending characteristics of FPCs, posing a risk of label warping and detachment. Inkjet-printed codes are prone to wear and tear under bending and high-temperature environments, resulting in information loss and affecting traceability reliability. Additionally, they require specialized equipment (such as inkjet printers) and consumables (stickers, inks), increasing manufacturing costs and maintenance complexity.

[0003] Furthermore, as electronic products become thinner, lighter, and more integrated, the available surface space of FPCs is increasingly limited, leading to a continuous shrinking of QR code sizes. Existing functional testing equipment, limited by optical resolution, depth of field, and decoding algorithms, struggles to reliably recognize these tiny QR codes, significantly impacting testing efficiency. Utility Model Content

[0004] One of the objectives of this invention is to propose a testing fixture that solves the problem that the QR code on the FPC is too small to be scanned and recognized by existing power testing equipment.

[0005] The technical solution of this utility model is as follows: A testing fixture includes an upper fixture mold and a lower fixture mold for fixing products. The upper fixture mold includes an upper mold frame, a scanning gun, and an upper mold support plate for mounting the scanning gun. The lower mold surface of the fixture has a test area for placing the FPC to be tested. The upper mold support plate is located on the upper part of the upper mold frame, and a window is opened on the upper part of the test area of ​​the upper mold frame to facilitate scanning by the barcode scanner.

[0006] Furthermore, the scanner is a high-resolution MINI industrial camera, and a ring-shaped LED light source is provided at the front of the scanner.

[0007] Furthermore, the upper mold support plate is provided with an L-shaped bracket, and the scanning gun is connected to the L-shaped bracket through an angle adjustment structure.

[0008] Furthermore, the angle adjustment structure includes an L-shaped adjustment plate and an arc-shaped adjustment hole with the L-shaped adjustment plate. The arc-shaped adjustment hole is located on one side of the L-shaped adjustment plate and is connected to the L-shaped bracket by a detachable fastener; The end of the L-shaped adjustment plate furthest from the arc-shaped adjustment hole is fixedly connected to the scanner.

[0009] Furthermore, the scanner has a resolution of 5 megapixels and a minimum decoding size of 0.3mm*0.3mm.

[0010] Furthermore, the lower mold of the fixture is provided with a pin plate for connecting to the test machine and for conducting continuity tests; The needle plate is located within the test area.

[0011] An FPC adapted to the above-mentioned testing fixture includes a MIC device, wherein the MIC device is etched with a QR code, and the QR code is located in a non-conductive area on the surface of the MIC device's encapsulation layer.

[0012] Furthermore, the QR code is a Data Matrix code, with a size of 1.2mm × 1.2mm and an etching depth of 10±2μm.

[0013] Furthermore, the surface of the QR code is coated with a transparent polyimide protective layer.

[0014] The beneficial effects of this utility model are as follows: This invention solves the problem that the QR codes on existing FPCs are too small to be scanned and recognized by existing dynamometers by using a dual design of a testing fixture and a PFC.

[0015] Data Matrix QR codes can store a large amount of data in a very small space (MIC device), and the recognition accuracy of the QR codes can be improved by etching. Then, a high-resolution scanner on the detection fixture can achieve accurate scanning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the structure of Example 2; Figure 3 This is a perspective view of Example 2; Figure 4 This is a schematic diagram of scanning when Example 1 and Example 2 are used together.

[0017] In the diagram: 11. Upper mold frame; 12. Scanner; 13. Upper mold support plate; 131. Window; 14. L-shaped bracket; 15. Ring LED light source; 16. Arc-shaped adjustment hole; 17. Test area; 18. Needle plate; 19. L-shaped adjustment plate; 2. Lower mold of fixture; 3. FPC; 31. MIC device; 32. QR code. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1

[0020] like Figure 1 As shown, an FPC3 includes a MIC device 31. A permanent QR code 32 is formed on the surface of the MIC device 31 by laser engraving or etching. This embodiment prefers etching, which facilitates large-scale batch processing, reduces costs, and avoids thermal damage, thus preventing damage to the FPC3 and MIC devices. In particular, the etching method allows for greater depth, improving the recognizability of the QR code 32. In this embodiment, to improve recognition efficiency, the etching depth of the QR code 32 is set to 10±2μm. A transparent polyimide protective layer is also coated on the surface of the QR code 32 to enhance its high-temperature resistance (260℃) and chemical corrosion resistance.

[0021] This embodiment uses a Data Matrix QR code 32, which is more suitable for space-constrained scenarios such as industrial identification and small part coding for MIC devices 31 on FPC3. Therefore, the size of the QR code 32 can be controlled to 1.2mm × 1.2mm, occupying a small area. In order to prevent affecting the function of MIC device 31, this embodiment places the QR code 32 in a non-conductive area on the surface of the MIC device 31's encapsulation layer.

[0022] Example 2

[0023] like Figure 2-4 As shown, this embodiment provides a testing fixture, including but not limited to testing the aforementioned FPC3. Specifically, this embodiment includes an upper fixture mold and a lower fixture mold 2 for fixing the product. The lower fixture mold 2 can be fixedly connected to a workbench. The upper fixture mold includes an upper mold frame 11, a scanning gun 12, and an upper mold support plate 13 for mounting the scanning gun 12. The upper mold frame 11 is connected to the upper mold support plate 13 through several columns, and a space is left between the upper mold frame 11 and the upper mold support plate 13 for placing and removing the FPC3.

[0024] In this embodiment, a test area 17 for placing the FPC3 to be tested is opened on the surface of the lower mold 2 of the fixture. A pin plate 18 is provided in the test area 17 of the lower mold 2 for electrical connection with the testing machine and for conducting continuity tests, so as to facilitate the simultaneous performance testing of relevant electrical performance after scanning and identifying the FPC3. At the same time, a positioning structure for positioning the FPC3 to be tested can also be provided in the test area 17, which will not be described in detail in this embodiment.

[0025] The upper mold frame 11 and the upper mold support plate 13 move toward the lower mold 2 of the fixture, pressing down the FPC3 to be tested for scanning and detection. The upper mold frame 11 and the lower mold 2 of the fixture are connected by elastic columns or guide rods, which will not be described in detail in this embodiment.

[0026] In this embodiment, the upper mold support plate 13 is located on the upper part of the upper mold frame 11 and is used to support and install the scanning gun 12. A window 131 is provided on the upper part of the test area of ​​the upper mold frame 11 to facilitate scanning by the scanning gun 12, so as to avoid blocking the scanning gun 12 from scanning the FPC3 below.

[0027] To more accurately parse the information in the QR code 32, the scanner 12 in this embodiment preferably uses a high-resolution MINI industrial camera with a resolution of at least 5 megapixels and a minimum decoding size of 0.3mm*0.3mm. A ring-shaped LED light source 15 is provided in front of the camera of the scanner 12 to provide supplemental lighting for the QR code.

[0028] Because the QR code 32 in Example 1 is only 1.2*1.2mm in size, it places high demands on the recognition equipment. This small QR code 32 contains relatively limited information, but due to its small size, more precise positioning and magnification are required for recognition. A high-resolution industrial camera is used as the scanning device, coupled with a ring-shaped LED light source 15 (preferably a brightness-adjustable light source, built into the scanner 12 housing), ensuring a scanning success rate of ≥99% even when the FPC3 is bent. Its 59*44mm range determines the approximate area of ​​the product or QR code 32 it can cover. This ensures that the 1.2*1.2mm QR code 32 is accurately located and effectively recognized within this range.

[0029] In this embodiment, the upper mold support plate 13 is equipped with an L-shaped bracket 14, and the scanner 12 is connected to the L-shaped bracket 14 through an angle adjustment structure. This allows for adjustment of the scanning angle of the scanner 12 to accommodate different FPC3 structures and the position of the QR code 32, making it more flexible to use. Furthermore, the L-shaped bracket's design prevents obstruction of the scanner 12 during scanning, ensuring accurate acquisition of the valid portion of the QR code 32 each time. Consideration must be given to the FPC3 and fixture structure before installing the scanner 12. Different product shapes, sizes, and fixture designs will affect the position and angle of the QR code 32 relative to the scanner 12.

[0030] Specifically, the aforementioned angle adjustment structure includes an L-shaped adjustment plate 19 and an arc-shaped adjustment hole 16 with the L-shaped adjustment plate 19. The arc-shaped adjustment hole 16 is located on one side of the L-shaped adjustment plate 19, and the scanner 12 is connected to the L-shaped bracket 14 by a detachable fastener (such as a bolt). When adjustment is needed, the bolt can be loosened, the position of the scanner 12 can be adjusted along the arc-shaped adjustment hole, and the bolt can be tightened again after adjustment.

[0031] The end of the L-shaped adjustment plate 19 furthest from the arc-shaped adjustment hole 16 is fixedly connected to the scanner 12, providing space for the scanner 12 to be placed and adjusted. Furthermore, by suspending the scanner 12, the L-shaped adjustment plate ensures the support strength and stability of the scanner 12, reducing the space occupied and obstructed.

[0032] Furthermore, this embodiment also includes a positioning hole on the L-shaped adjustment plate 19, through which a bolt can be threaded for fixed connection with the L-shaped bracket 14. This positioning hole is located at the center of the arc-shaped adjustment hole 16, and also between the scanner 12 and the arc-shaped adjustment hole 16. Using the positioning hole as the rotation axis of the scanner 12 allows for double fixation via the arc-shaped adjustment hole 16 and the positioning hole after the scanner 12 angle has been adjusted, thus improving the stability of the scanner 12.

[0033] In this embodiment, the FPC3 to be tested is placed in the test area 17, and the barcode scanner 12 is activated to scan the QR code 32 on the FPC3. After scanning, a unique traceability ID is generated (including MIC batch number, SMT soldering information, and functional test station traceability). Then, the FPC3 is tested for performance using the pin tray 18. Then, synchronously or after scanning, the upper mold frame 11 is pressed down to test the FPC3. After the test is completed, the test results can be bound to the database in real time.

[0034] To accurately identify QR code 32, the image can also be magnified using visual software, which will not be elaborated on in this embodiment.

[0035] 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 testing fixture, comprising an upper fixture mold and a lower fixture mold (2) for fixing products, characterized in that, The upper mold of the fixture includes an upper mold frame (11), a scanning gun (12), and an upper mold support plate (13) for mounting the scanning gun (12). The lower mold (2) of the fixture has a test area (17) for placing the FPC (3) to be tested. The upper mold support plate (13) is located on the upper part of the upper mold frame (11) and has an opening (131) on the upper part of the test area of ​​the upper mold frame (11) to facilitate scanning by the barcode scanner (12). The scanner (12) is a high-resolution MINI industrial camera, and a ring-shaped LED light source (15) is provided at the front of the scanner (12). The upper mold support plate (13) is provided with an L-shaped bracket (14), and the scanning gun (12) is connected to the L-shaped bracket (14) through an angle adjustment structure. The angle adjustment structure includes an L-shaped adjustment plate (19) and an arc-shaped adjustment hole (16) with the L-shaped adjustment plate (19) provided. The arc-shaped adjustment hole (16) is located on one side of the L-shaped adjustment plate (19) and is connected to the L-shaped bracket (14) by a detachable fastener. The end of the L-shaped adjustment plate (19) away from the arc-shaped adjustment hole (16) is fixedly connected to the scanner (12); The scanner (12) has a resolution of 5 megapixels and a minimum decoding size of 0.3mm*0.3mm.

2. The testing fixture according to claim 1, characterized in that, The lower mold (2) of the fixture is provided with a pin plate (18) for connecting to the test machine and for conducting the test. The needle plate (18) is located within the test area (17).

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