A PCBA testing device
By using a flexible carrier board and clamping mechanism to adapt to PCBA warping deformation, the problem of inaccurate testing on large-area PCBAs by traditional test fixtures is solved, achieving efficient and reliable electrical contact and equipment flexibility, thereby improving test accuracy and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HUIHE NUCLEAR POWER TECH CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-03
Smart Images
Figure CN224456960U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of testing devices, and in particular to a PCBA testing device. Background Technology
[0002] PCBA refers to a finished circuit board formed by assembling electronic components onto a bare PCB using SMT (Surface Mount Technology) and / or DIP (Dual In-line Package) processes. To ensure that the delivered PCBA meets design requirements, rigorous testing is required after manufacturing. This testing mainly includes electrical characteristic testing, functional testing, and fault diagnosis. The aim is to screen out defective products for rework and to provide data support for optimizing the front-end manufacturing process.
[0003] PCBA testing is typically performed using a dedicated test fixture equipped with a high-density probe array. During testing, the probes contact the test points on the PCBA to establish an electrical connection path, thereby verifying key indicators such as circuit continuity, short circuit conditions, and component parameters.
[0004] However, as PCBAs become increasingly larger, they are more prone to warping during manufacturing, handling, or heating. This makes traditional rigid test fixtures ill-suited for the unevenness of such large-area boards. Probes in low-warping areas are subjected to excessive pressure, posing a risk of damaging the probes or the PCBA; while probes in high-warping areas may experience poor contact or even become completely suspended, failing to form a reliable electrical connection. This directly leads to inaccurate test results and an increased false positive rate. Utility Model Content
[0005] The main objective of this invention is to provide a PCBA testing device to solve the aforementioned technical problems.
[0006] To achieve the above objectives, this utility model provides a PCBA testing device, comprising:
[0007] The base contains an electrical testing module.
[0008] A needle plate is disposed on the base. The needle plate is provided with a plurality of test probes and a plurality of guide posts. Each of the test probes is electrically connected to the electrical test module.
[0009] A flexible carrier plate is slidably sleeved on the guide post. A plurality of first elastic elements are distributed between the needle plate and the flexible carrier plate. A plurality of clearance holes are provided on the flexible carrier plate for the test probe to pass through.
[0010] A pressure plate is vertically mounted above the flexible carrier plate, and the lower end of the pressure plate is provided with several clamping posts corresponding to the non-sensitive area of the PCBA to be tested.
[0011] A driving component is used to drive the pressure plate to move up and down.
[0012] Optionally, in one embodiment, the needle plate is detachably connected to the base via a quick-release structure, and the test probe is detachably connected to the needle plate.
[0013] Optionally, in one embodiment, the first elastic element is a spring, which is coaxially sleeved on the guide post, and its two ends respectively abut against the needle plate and the flexible carrier plate.
[0014] Optionally, in one embodiment, the upper end of the flexible carrier board is provided with a plurality of positioning pins at the positioning holes corresponding to the PCBA under test, in order to limit the lateral displacement of the PCBA under test.
[0015] Optionally, in one embodiment, the drive element is a quick clamp, a cylinder, an electric actuator, or a linear motor.
[0016] Optionally, in one embodiment, a support frame is further included, which is vertically fixed to the base and forms a portal frame. The drive component is installed in the middle of the horizontal plate of the support frame, and the pressure plate is connected to the drive end of the drive component.
[0017] Optionally, in one embodiment, it further includes two guide members respectively disposed on both sides of the pressure plate and a slider slidably connected to the guide members, the pressure plate being connected to the slider.
[0018] Optionally, in one embodiment, a linear bearing is further included, the guide is a vertical guide rod, and the slider is slidably connected to the vertical guide rod via the linear bearing.
[0019] Optionally, in one embodiment, a second elastic element is sleeved on the vertical guide rod, and the two ends of the second elastic element abut against the slider and the base, respectively.
[0020] Optionally, in one embodiment, the inclined plate of the base is provided with a push-button switch and a toggle switch, and the bottom of the base is provided with rubber feet.
[0021] In the technical solution provided by this utility model, the PCBA under test is placed on a flexible carrier plate. When the driving component drives the pressure plate to move down, the clamping column first presses against the non-electrically sensitive area of the PCBA under test to position it and initially flatten it. Then, the pressure is transmitted to the first elastic element through the flexible carrier plate. The first elastic element is deformed under pressure, allowing the flexible carrier plate to slide relative to the needle plate along the guide column and adapt to the local warping deformation of the PCBA under test. This makes all test probes form reliable electrical contact with the test points on the PCBA under test, significantly improving the test accuracy and effectively preventing damage to the test probes or PCBA. Attached Figure Description
[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the PCBA testing device of this utility model;
[0024] Figure 2 This is a partial structural schematic diagram of an embodiment of the PCBA testing device of this utility model.
[0025] The components include: 1. Base; 11. Button switch; 12. Twist switch; 13. Rubber foot pad; 2. Needle plate; 21. Test probe; 22. Guide post; 23. First elastic element; 3. Flexible carrier plate; 31. Clearance hole; 4. Pressure plate; 41. Pressing post; 5. Drive element; 6. Support frame; 71. Guide element; 72. Slider; 73. Second elastic element. Detailed Implementation
[0026] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only. In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Thus, unless otherwise stated, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.
[0027] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections via an intermediate medium, or internal communication between two components. All technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0029] like Figures 1 to 2 As shown, this utility model embodiment provides a PCBA testing device, including: a base 1, which has an electrical testing module inside; a pin plate 2, which is disposed on the base 1, and has a plurality of test probes 21 and a plurality of guide posts 22, each of the test probes 21 being electrically connected to the electrical testing module; a flexible carrier plate 3, which is slidably sleeved on the guide posts 22, and a plurality of first elastic elements 23 are distributed between the pin plate 2 and the flexible carrier plate 3, the first elastic elements 23 being springs or elastic pads, etc., and the flexible carrier plate 3 having a plurality of clearance holes 31 for the test probes 21 to pass through; a pressure plate 4, which is vertically and flexibly disposed above the flexible carrier plate 3, and the lower end of the pressure plate 4 has a plurality of pressing posts 41 corresponding to the non-sensitive area of the PCBA to be tested; and a driving member 5, which is used to drive the pressure plate 4 to move up and down.
[0030] The PCBA under test is placed on the flexible carrier plate 3. When the driving component 5 drives the pressure plate 4 to move down, the clamping column 41 first presses against the non-electrically sensitive area of the PCBA under test to position it and initially flatten it. Then, the pressure is transmitted to the first elastic element 23 through the flexible carrier plate 3. The first elastic element 23 is deformed under pressure, allowing the flexible carrier plate 3 to slide relative to the pin plate 2 along the guide column 22 and adapt to the local warping deformation of the PCBA under test. This makes all test probes 21 form reliable electrical contact with the test points on the PCBA under test, significantly improving the test accuracy and effectively preventing damage to the test probes 21 or the PCBA.
[0031] The pin plate 2 is detachably connected to the base 1 via a quick-release structure, which can be a bolt or a clip, and the test probe 21 is detachably connected to the pin plate 2. For PCBAs produced in small batches with multiple varieties, the layout of the pin plate 2 and the test probe 21 can be quickly changed, significantly reducing changeover time and improving testing efficiency.
[0032] In this embodiment, the first elastic element 23 is a spring, which is coaxially sleeved on the guide post 22, and its two ends abut against the needle plate 2 and the flexible carrier plate 3 respectively, ensuring that the spring always moves in the vertical direction during compression, preventing the spring from deflecting, jamming or twisting, and ensuring the smoothness and linearity of the movement of the flexible carrier plate 3. The upper end of the flexible carrier plate 3 is provided with several positioning pins corresponding to the positioning holes of the PCBA under test, which are used to limit the lateral displacement of the PCBA under test and ensure that the test probe 21 is precisely aligned with the test point of the PCBA.
[0033] Among them, the drive component 5 can be a quick clamp, cylinder, electric push rod, or linear motor, etc. Users can freely choose the drive solution according to production capacity, cost, and degree of automation. Figure 1 As shown, in this embodiment, the driving component 5 is a quick clamp.
[0034] like Figure 1 As shown, the PCBA testing device also includes a support frame 6, which is vertically fixed on the base 1 and forms a portal frame. The drive unit 5 is installed in the middle of the horizontal plate of the support frame 6. The pressure plate 4 is connected to the drive end of the drive unit 5, so that the driving force acts on the central area of the pressure plate 4, which is conducive to the even distribution of pressure to the pressure plate 4 and the pressing column 41 on it, thereby transmitting it to the PCBA more evenly.
[0035] Furthermore, the PCBA testing device also includes two guide members 71 respectively disposed on both sides of the pressure plate 4 and a slider 72 slidably connected to the guide members 71. The pressure plate 4 is connected to the slider 72. The guide member 71 can be a guide rod, guide rail or slide groove structure, etc. The guide member 71 can ensure that the pressure plate 4 remains horizontal during the descent and ascent process and will not tilt or deviate.
[0036] In this embodiment, the guide 71 is a vertical guide rod. The PCBA testing device also includes a linear bearing. The slider 72 is slidably connected to the vertical guide rod through the linear bearing, ensuring that the pressure plate 4 can be raised and lowered easily, flexibly, and without jamming. A second elastic element 73 is sleeved on the vertical guide rod. The second elastic element 73 can be a spring or an elastic pad, etc., and its two ends abut against the slider 72 and the base 1, respectively.
[0037] In this embodiment, the base 1 is made of bakelite to ensure lightweight and high strength; the needle plate 2, flexible carrier plate 3, and pressure plate 4 are all made of transparent acrylic material, which makes it easy for operators to observe the contact status between the test probe 21 and the PCBA test point in real time; the inclined plate of the base 1 is equipped with a push button switch 11 and a toggle switch 12, which correspond to the start / stop function and the mode switching function, respectively; rubber feet 13 are symmetrically installed at the four corners of the bottom of the base 1 to absorb the vibration of the equipment through damping and shock absorption.
[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A PCBA testing device, characterized in that, include: The base (1) has an electrical testing module inside; A needle plate (2) is disposed on the base (1). The needle plate (2) is provided with a plurality of test probes (21) and a plurality of guide posts (22). Each of the test probes (21) is electrically connected to the electrical test module. The flexible carrier plate (3) is slidably sleeved on the guide post (22). A plurality of first elastic elements (23) are distributed between the needle plate (2) and the flexible carrier plate (3). A plurality of clearance holes (31) are opened on the flexible carrier plate (3) for the test probe (21) to pass through. The pressure plate (4) is vertically mounted above the flexible carrier plate (3), and the lower end of the pressure plate (4) is provided with several clamping columns (41) corresponding to the non-sensitive area of the PCBA to be tested. The driving component (5) is used to drive the pressure plate (4) to move up and down.
2. The PCBA testing device of claim 1, wherein, The needle plate (2) is detachably connected to the base (1) via a quick-release structure, and the test probe (21) is detachably connected to the needle plate (2).
3. The PCBA testing device of claim 1, wherein, The first elastic element (23) is a spring, which is coaxially sleeved on the guide post (22), and its two ends respectively abut against the needle plate (2) and the flexible carrier plate (3).
4. The PCBA testing apparatus of claim 1, wherein, The upper end of the flexible carrier plate (3) is provided with several positioning pins at the positioning holes corresponding to the PCBA under test, in order to limit the lateral displacement of the PCBA under test.
5. The PCBA testing apparatus of claim 1, wherein, The drive component (5) is a quick clamp, cylinder, electric push rod or linear motor.
6. The PCBA testing device of claim 5, wherein, It also includes a support frame (6), which is vertically fixed on the base (1) and forms a door frame. The drive component (5) is installed in the middle of the horizontal plate of the support frame (6), and the pressure plate (4) is connected to the drive end of the drive component (5).
7. The PCBA testing device of claim 6, wherein, It also includes two guide members (71) respectively disposed on both sides of the pressure plate (4) and a slider (72) slidably connected to the guide members (71), the pressure plate (4) being connected to the slider (72).
8. The PCBA testing device of claim 7, wherein, It also includes a linear bearing, the guide (71) is a vertical guide rod, and the slider (72) is slidably connected to the vertical guide rod through the linear bearing.
9. The PCBA testing apparatus of claim 8, wherein, A second elastic element (73) is sleeved on the vertical guide rod, and the two ends of the second elastic element abut against the slider (72) and the base (1) respectively.
10. The PCBA testing apparatus of claim 1, wherein, The base (1) has a push-button switch (11) and a toggle switch (12) on its inclined plate, and a rubber foot pad (13) is provided at the bottom of the base (1).