PCB semi-automatic impedance measurement jig

Abstract

The utility model discloses a PCB semi-automatic impedance measuring tool. The core highlights of the PCB semi-automatic impedance measuring tool are external connection innovation of a test probe and a gas cap device and stable fixation design of a PCB. In the jig, the gas cap device is used as a stable base of the test probe, so that not only is the installation and maintenance process of the probe simplified, but also the stable contact in the measurement process is ensured through an accurate position keeping function. The PCB is skillfully fixed by the circular salient points uniformly distributed on the protective bottom plate, and the salient points not only provide stable support for the PCB, but also can adapt to PCBs of different sizes, so that the stability and accuracy of the PCB in the measurement process are ensured. The design not only improves the precision and efficiency of measurement, but also shows the flexibility and reliability of the jig in the aspect of adapting to PCBs of different specifications, and meets the strict requirements of the modern electronic manufacturing industry for high-precision and high-efficiency test equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic test equipment, in particular to a semi-automatic impedance measurement fixture for PCB Background Art

[0002] With the rapid development of electronic technology, as a basic component of electronic devices, the design and manufacturing requirements of PCB (Printed Circuit Board) are increasing day by day. Especially under the promotion of advanced packaging technologies such as wafer-level chip scale packaging (WLCSP) and high density interconnect substrate (HDI), the design complexity of PCB boards has increased sharply, posing unprecedented challenges to the accuracy, stability and efficiency of impedance measurement.

[0003] However, in the existing impedance measurement process of PCB boards, there are a series of problems to be solved urgently. First of all, unstable clamping and fixing is the key factor restricting measurement accuracy and reliability. The traditional manual clamping method is not only inefficient, but also prone to uneven clamping force and position deviation due to human factors, thus affecting the accuracy of measurement results.

[0004] Secondly, it is difficult for the measurement accuracy and efficiency to meet the requirements of advanced packaging technologies. In the face of high-density and high-precision PCB boards, the existing measurement equipment has obvious deficiencies in aspects such as rapid positioning of test points, accurate measurement and data processing, and cannot effectively ensure the accuracy and efficiency of measurement results.

[0005] In addition, low automation is also a major pain point of the existing measurement technology. In modern production lines, automation is an important way to improve production efficiency and reduce costs. However, at present, the impedance measurement of PCB boards mostly still relies on manual operation, which not only increases labor costs, but also limits the overall efficiency of the production line.

[0006] In view of the above problems, the utility model proposes an innovative patent for impedance measurement of PCB boards, aiming to solve the bottleneck problems in the existing technology through technological innovation. The core of this patent lies in designing an efficient, stable and semi-automatic impedance measurement fixture and measurement method, which can realize rapid and accurate impedance measurement of PCB boards, especially under advanced packaging technologies. Summary of the Utility Model

[0007] The embodiment of the utility model provides a semi-automatic impedance measurement fixture for PCB, which can improve the accuracy and efficiency of impedance measurement, so as to solve the problems of low efficiency of manual operation in the traditional measurement method and measurement accuracy problems caused by differences in the testing techniques of testers and inaccurate testing positions.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A semi-automatic impedance measurement fixture for PCB mainly includes a protective bottom plate, a fixing bracket, a base, a pneumatic jacking device, a connecting bracket, an impedance measurement probe buckle and a pneumatic jacking device button.

[0010] Preferably, the protective bottom plate is used to place the PCB board to be measured. As the basis of the fixture, the protective bottom plate is connected with a fixing bracket on it to support and fix the whole fixture structure, ensuring the stability during the measurement process. The fixing bracket is made of lightweight and high-strength materials, which not only reduces the overall weight but also ensures the structural stability, improving the portability and service life of the fixture.

[0011] Preferably, a pneumatic jacking device is installed on one side of the fixing bracket. This device integrates a return spring, a ejector pin and a conical top plate to form a stable base to support the impedance measurement probe. The rear end of the pneumatic jacking device is connected with a pneumatic jacking device button, and the pneumatic jacking device button is fixedly installed on the connecting bracket. During the measurement, press the pneumatic jacking device button, control the air pressure in the pneumatic jacking device through several holes in it, so that the ejector pin extends driven by the air pressure, pushing the conical top plate into close contact with the impedance measurement probe buckle, ensuring the precise docking between the measurement probe and the test point of the PCB board. After the measurement is completed, slowly release the pneumatic jacking device button, and the return spring automatically resets the ejector pin, facilitating the next measurement.

[0012] Preferably, an impedance measurement probe buckle is installed at the front end of the pneumatic jacking device. This buckle is not only used to fix and install the impedance measurement probe, but also has a detachable fixing component, allowing users to conveniently replace test probes of different specifications and requirements to adapt to the diverse impedance test needs of PCB boards, enhancing the versatility and flexibility of the fixture.

[0013] Preferably, a number of circular convex points are evenly distributed on the surface of the protective bottom plate. These convex points are made of soft materials, aiming to reduce the damage to the surface of the PCB board, and at the same time ensure the stable fixation and flatness of the PCB board during the measurement process, further improving the measurement accuracy.

[0014] Preferably, the other side of the fixing bracket is connected to the base through the connecting bracket, providing the overall structural stability and support force for the fixture, ensuring no shaking or displacement during the measurement process.

[0015] Preferably, three mounting holes are also reserved on the base, facilitating the connection and installation of the fixture to the workbench surface or other components of the fixture.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. The test probe can be translated smoothly, avoiding the instability and inaccuracy caused by manual movement of the test probe by humans, greatly improving the accuracy and precision of the test results.

[0018] 2. It can effectively avoid the repeated operation of fetching the test probe back and forth. The function of the air jacking device effectively avoids the unnecessary loss caused by improper operation of the test probe and test line, and at the same time reduces the repeated operation of fetching the test probe back and forth.

[0019] 3. It can quickly and effectively improve the measurement efficiency (more than 3 times that of manual measurement), and also reduces the unnecessary human resource loss through the function of the air jacking device, significantly improving the test accuracy.

[0020] 4. It can effectively avoid the unnecessary material loss caused by manual operation. By reducing human intervention, it further avoids the unnecessary material loss caused by manual operation.

[0021] 5. It can be reused and measured quickly, greatly saving the test time and reducing the efficiency cost.

[0022] 6. It can be compatible with PCB boards of various sizes and thicknesses, greatly enhancing its adaptability and flexibility.

[0023] 7. Users do not need to prepare multiple sets of test equipment for PCB boards of different specifications, reducing the test cost and time cost, and at the same time improving the test consistency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0025] Figure 2 It is a schematic diagram of the protective bottom plate structure of the present utility model.

[0026] Figure 3 It is a schematic sectional view of the air jacking device of the present utility model.

[0027] Figure 4 It is a schematic internal view of the air jacking device button of the present utility model.

[0028] Figure 5 It is a schematic external view of the air jacking device of the present utility model.

[0029] Figure 6 It is a schematic diagram of the base part structure of the present utility model.

[0030] DESCRIPTION OF THE REFERENCE NUMERALS: 1. Protective bottom plate; 2. Fixed bracket; 3. Base; 4. Jacking device; 5. Connecting bracket; 6. Impedance measurement probe buckle; 7. Return spring; 8. Ejecting pin; 9. Conical top plate; 11. Protective bottom plate protruding disc; 12. Protective bottom plate central protruding disc; 31. Reserved mounting hole; 41. Air jacking device button; 42. Small hole. DETAILED DESCRIPTION OF THE INVENTION

[0031] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following provides a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0033] Referring to the attached Figure 1 to the attached Figure 6 , the present utility model provides a semi-automatic impedance measurement fixture for a PCB, and its specific embodiments are as follows:

[0034] Specifically, first, a protective bottom plate 1 was designed and manufactured. Its length and width were both determined according to the maximum size of the PCB to be tested, and an additional 100 mm edge margin was added to ensure the stability and safety of the PCB during the test. The surface of the protective bottom plate was treated with anti-slip to enhance the friction with the PCB and prevent it from sliding during the test, further enhancing stability.

[0035] Specifically, then a fixed bracket 2 was manufactured, and its height was set to 200 mm. The fixed bracket was made of a lightweight and high-strength material, which not only ensured the structural stability but also reduced the overall weight.

[0036] Specifically, the air jacking device 4 is a key component in the fixture. It includes a return spring 7, an ejector pin 8, a conical top plate 9, and an impedance measurement probe buckle 6 integrally formed with the outside of the air jacking device. In particular, an air jacking device button 41 is provided on the air jacking device, and this button is used to control the extension and retraction of the ejector pin 8. When the button is pressed, the air pressure drives the ejector pin 8 to extend, pushing the conical top plate 9 into contact with the impedance measurement probe buckle 6, and then making the measurement probe installed on the buckle contact the test point on the PCB. After the measurement is completed, when the button is released, the return spring 7 will automatically reset the ejector pin 8 to its initial position. This design avoids the instability of manual testing, ensures the accuracy and repeatability of the measurement, and improves the convenience of operation at the same time.

[0037] Specifically, the impedance measurement probe buckle 6 is provided with a detachable fixing component, allowing users to conveniently remove and replace the externally mounted test probe from the buckle. When designing, the impedance test requirements of PCB boards with different specifications and requirements need to be considered to ensure that the buckle can be compatible with the installation of a variety of test probes.

[0038] When using the present utility model, the user first needs to place the PCB board to be tested stably on the protective bottom plate and confirm its firm fixation. Subsequently, the user starts the test by pressing the air jack device button 41. The air jack device 4 moves translationally under the drive of air pressure, pushing the measurement probe mounted on the impedance measurement probe buckle 6 to accurately contact the test points on the PCB board. After the test is completed, the user releases the air jack device button 41, and the air jack device 4 automatically resets. In addition, the user can conveniently remove or replace the measurement probe to adapt to the impedance tests of PCB boards with different specifications and requirements. The entire operation process is simple and fast, greatly improving the test efficiency and accuracy.

[0039] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0040] 1. The test probe can be translated smoothly, avoiding the instability and inaccuracy caused by manually moving the test probe by humans, and greatly improving the accuracy and precision of the test results.

[0041] 2. The repeated operation of taking the test probe back and forth can be effectively avoided. The function of the air jack device effectively avoids the unnecessary losses caused by improper operation of the test probe and the test line, and at the same time reduces the repeated operation of taking the test probe back and forth.

[0042] 3. The measurement efficiency can be improved quickly and effectively (more than 3 times the time of manual measurement), and the unnecessary human losses are also reduced through the function of the air jack device, significantly improving the test precision.

[0043] 4. The unnecessary material losses caused by manual operation by humans can be effectively avoided. By reducing human intervention, the unnecessary material losses caused by manual operation by humans are further avoided.

[0044] 5. It can be reused and measured quickly, greatly saving the test time and reducing the efficiency cost.

[0045] 6. It can be compatible with PCB boards of various sizes and thicknesses, greatly enhancing its adaptability and flexibility.

[0046] 7. Users do not need to prepare multiple sets of test equipment for PCB boards of different specifications, reducing the test cost and time cost, and at the same time improving the consistency and reliability of the test.

[0047] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. A semi-automatic impedance measurement jig for PCB, comprising a protective base plate (1), a fixing bracket (2), a base (3), a gas cap device (4), a connecting bracket (5), an impedance measurement probe buckle (6) and a gas cap device button (41), characterized in that: The protective bottom plate (1) is connected to a fixing bracket (2); a gas cap device (4) is provided on one side of the fixing bracket (2); an impedance measurement probe buckle (6) is provided at the front end of the gas cap device (4); a connecting bracket (5) is connected to the other side of the fixing bracket (2), and the connecting bracket (5) is further connected to a base (3) at the bottom of the fixture.

2. The PCB semi-automatic impedance measurement jig according to claim 1, characterized in that: The surface of the protective bottom plate (1) has a plurality of evenly distributed circular convex points (11) and a central circular convex point (12), and the material thereof is a soft material.

3. The PCB semi-automatic impedance measurement jig according to claim 1, characterized in that: The fixing bracket (2) is made of a light and high-strength material.

4. The PCB semi-automatic impedance measurement jig according to claim 1, characterized in that: The gas cap device (4) comprises a return spring (7), an ejection pin (8), a conical top plate (9), a gas cap device button (41), and an impedance measurement probe buckle (6) integrally formed with the outside of the gas cap device (4), wherein the gas cap device button (41) has a plurality of circular small holes (42) inside to control the ejection of the ejection pin (8) by gas during measurement, and the return spring (7) is used to automatically reset the ejection pin (8) after the measurement is completed. The ejection pin (8) is extended by air pressure or mechanical force during measurement, pushing the conical top plate (9) to contact the mounting structure on the impedance measurement probe buckle (6), thereby making the measurement probe mounted on the buckle (6) contact the test point on the PCB board.

5. The PCB semi-automatic impedance measurement jig according to claim 1, characterized in that: The impedance measurement probe buckle (6) is provided with a detachable fixing component, allowing the test probe installed externally to be conveniently removed from the buckle (6) and replaced.

6. The PCB semi-automatic impedance measurement jig according to claim 1, characterized in that: The base (3) is also provided with a mounting hole (31).

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