PCBA board detection tool

Abstract

The invention relates to the technical field of circuit board testing, and discloses a PCBA board detection tool, which comprises a testing module comprising a top board and an upper protection board which are fixedly arranged on a testing machine downward moving mechanism; the double-station test module comprises two switchable test stations, and each station comprises a test base, a probe plate and a lower protection plate; the displacement driving module is used for controlling the two testing stations to be alternately switched between a testing position and a loading and unloading position, the testing position is located under the testing module, and the loading and unloading position is located outside the testing machine; when one testing station is located at the testing position, the other testing station is located at the loading and unloading position and used for loading and unloading. Through a double-station alternate testing structure, continuous testing of the PCBA board is realized, the board replacement time is shortened, the testing efficiency is improved, and the problem that rapid board replacement and continuous testing are difficult to realize due to structural limitation of an existing detection tool for ICT testing is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit board testing, and particularly relates to a PCBA board detection tool. BACKGROUND

[0002] With the development of consumer electronics towards miniaturization and high integration, such as high-speed hair dryers, vacuum cleaners, smart wearable devices, etc., the detection point spacing of the PCBA board is smaller and the precision requirement is higher. At present, the industry generally uses ICT testing machines for detection to ensure product quality. However, the traditional ICT testing tool still has efficiency bottlenecks when dealing with high-density, small-batch and multi-batch PCBA board manufacturing requirements, and it is difficult to meet the industry demand for rapid testing.

[0003] The traditional ICT testing tool is usually composed of two parts: one part is the test base, probe plate and lower guard plate fixed on the test table, and the other part is the upper guard plate and the upper guard plate installed on the lower moving mechanism of the ICT testing machine. During testing, the PCBA board is placed on the lower guard plate, the lower moving mechanism of the ICT testing machine drives the upper guard plate to descend, so that the probe contacts the PCBA board to complete the detection. However, this scheme has a major pain point, which is that each time the PCBA board is replaced, the test needs to be paused, which takes about 10-15 seconds, and the cumulative time loss is significant in batch testing scenarios, which seriously affects the test cycle efficiency.

[0004] Currently, consumer electronics PCBA board manufacturing presents the characteristics of high density, small batch and multi-batch, and some PCBA boards also have a burning process, which puts forward higher requirements on testing efficiency. Due to the structural limitations of the existing ICT testing tool, it is difficult to realize rapid board replacement and continuous testing, which becomes a key factor restricting the improvement of production efficiency. Therefore, an innovative PCBA board detection tool is urgently needed to optimize the testing process and shorten the board replacement time, so as to break through the technical bottleneck of the existing technology and meet the industry demand for efficient detection. SUMMARY

[0005] The present application provides a PCBA board detection tool, which solves the problem that the detection tool for ICT testing in the prior art is difficult to realize rapid board replacement and continuous testing due to structural limitations. The present application realizes continuous testing of the PCBA board through a double-station alternating testing structure, reduces the board replacement time, and improves the testing efficiency.

[0006] The application provides a PCBA board detection tool, which comprises a test module, a double-station test module, and a displacement driving module.

[0007] Further, the double-station test module comprises a box body, a moving plate 1, a moving plate 2, a synchronous assembly, and a lifting assembly.

[0008] Further, the lifting assembly comprises an inner stand plate, a path plate, a horizontal moving plate, a guide rod, and a cam.

[0009] Further, the synchronous assembly comprises a synchronous wheel 1, a synchronous wheel 2, and a synchronous belt.

[0010] Further, the shift driving module comprises a linear module and a connecting block, the linear module is fixed on the outer side plate of one side of the box body, and the connecting block is connected between the linear module and the moving plate one.

[0011] Further, a machine vision-based positioning system is further included, comprising: a multi-sensor array including an optical camera for collecting an optical image of the PCBA board to be tested; and an edge computing unit for feature point matching between the collected image and a standard image.

[0012] Further, the multi-sensor array further comprises an infrared thermal imager for monitoring the temperature distribution of the PCBA board to be tested.

[0013] One or more technical solutions provided in the present application have at least the following technical effects or advantages:

[0014] Due to the double-station cooperative working mechanism, when the moving plate one carries the PCBA board to be tested into the test position, the test module is pressed down to complete the electrical detection, and the moving plate two is automatically moved to the loading and unloading position to perform loading and unloading. The lifting assembly can make the moving plate two accurately descend to avoid the moving plate one when the station is switched, realize double-station non-interference alternating operation, cooperate with the machine vision system to realize high-precision positioning detection, and realize continuous testing of the PCBA board as a whole, reduce the board changing time, improve the testing efficiency, and solve the problem that the detection tool for ICT testing in the prior art is difficult to realize rapid board changing and continuous testing due to structural limitations. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the PCBA board detection tool in the embodiments of the present application;

[0016] Figure 2 FIG. 2 is another view of part of the structure in FIG. 1; Figure 1

[0017] Figure 3 FIG. 3 is a schematic diagram of part of the structure in FIG. 1, mainly showing the structure of the synchronous assembly and the lifting assembly; Figure 2

[0018] Figure 4 FIG. 4 is a schematic diagram of part of the structure in FIG. 3, mainly showing part of the structure of the lifting assembly; Figure 1

[0019] Figure 5 FIG. 5 is a schematic diagram of part of the structure in FIG. 4, mainly showing part of the structure of the lifting assembly; Figure 4

[0020] ​​​​In the figure: 11, test base; 12, probe board; 13, lower guard plate; 14, top plate; 15, upper guard plate; 21, box body; 211, outer side plate; 212, bottom plate; 213, end plate; 22, moving plate one; 23, moving plate two; 24, synchronization assembly; 241, synchronization wheel one; 242, synchronization wheel two; 243, synchronization belt; 25, lifting assembly; 251, inner vertical plate; 252, path plate; 2521, upper horizontal groove; 2522, lower horizontal groove; 253, horizontal moving plate; 2531, guide seat; 2532, perforation; 254, guide rod; 255, cam; 256, connecting rod; 31, linear module; 32, connecting block; 4, extension plate. DETAILED DESCRIPTION

[0021] In order to better understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0022] Referring to Figure 1 and Figure 2 , the PCBA board detection tool mainly consists of three parts, including a test module, a double-station test module, and a displacement driving module.

[0023] The test module includes the top plate 14 and the upper guard plate 15. The top plate 14 is fixed to the lower moving mechanism of the ICT test machine, and the upper guard plate 15 is fixed parallel below the top plate 14. The upper guard plate 15 is provided with a plurality of probes for detection. The lower moving mechanism of the ICT test machine pushes the test module to move downward and upward.

[0024] The double-station test module includes two switchable test stations. Each station includes a test base 11, a probe board 12, and a lower guard plate 13. The double-station test module also includes a box body 21, a moving plate one 22, a moving plate two 23, a synchronization assembly 24, and a lifting assembly 25. The moving plate one 22 serves as one of the test stations, and the moving plate two 23 serves as the other test station. The displacement driving module is used as a driving source to switch the two test stations between a test position and a loading and unloading position through the cooperation of the synchronization assembly 24 and the lifting assembly 25. The test position is located directly below the test module, and the loading and unloading position is located outside the test machine. When one of the test stations is in the test position, the other test station is in the loading and unloading position and is used for loading and unloading.

[0025] Referring to Figure 3 , Figure 4 and Figure 5The box body 21 is composed of outer side plates 211, a bottom plate 212 and end plates 213. Two outer side plates 211 are vertically fixed on the two side edges of the bottom plate 212, and two end plates 213 are fixed on the two ends of the bottom plate 212, so that the box body 21 is in the shape of an internal cavity with an open top. In addition, the top surface of each of the two outer side plates 211 is fixed with a sliding rail, and the lower bottom surface of the moving plate 22 is fixed with a sliding block. The sliding connection of the sliding rail and the sliding block can make the moving plate 22 move horizontally on the top surface of the box body 21.

[0026] The lifting assembly 25 is used to drive the moving plate 23 to pass through the moving plate 22 in the reverse movement synchronously with the moving plate 22. Specifically, the lifting assembly 25 includes inner vertical plates 251, a path plate 252, a horizontal moving plate 253, guide rods 254, a cam 255 and a connecting rod 256. The inner vertical plates 251 are fixed on the upper surface of the bottom plate 212 of the box body 21. The height of the inner vertical plates 251 is lower than that of the outer side plates 211 of the box body 21. The two inner vertical plates 251 are symmetrically arranged on the two sides of the bottom plate 212 and close to the outer side plates 211 of the box body 21. The path plate 252 is fixed on the upper surface of the bottom plate 212 of the box body 21. The path plate 252 is located at the middle position between the two inner vertical plates 251. The height of the path plate 252 is lower than that of the inner vertical plates 251. The path plate 252 is provided with a path groove 2521. The path groove 2521 includes an upper horizontal groove 25211 located at the two ends of the path plate 252 and close to the top surface and a lower horizontal groove 25212 located at the middle of the path plate 252 and close to the bottom surface. The upper horizontal groove 25211 and the lower horizontal groove 25212 are smoothly connected. The top surface of each of the two inner vertical plates 251 is fixed with a sliding rail, and the lower bottom surface of the horizontal moving plate 253 is fixed with a sliding block. The sliding connection of the sliding rail and the sliding block can make the horizontal moving plate 253 slide on the top surface of the inner vertical plate 251. The guide rods 254 are provided with four vertical rods arranged at the four corners of the horizontal moving plate 253. The four corners of the horizontal moving plate 253 are fixed with guide seats 2531. The top end of the guide rod 254 is fixed on the lower bottom surface of the moving plate 23, and the bottom end penetrates through the guide seat 2531 and the horizontal moving plate 253. The cam 255 is rollingly arranged in the path groove 2521. The moving plate 23 is arranged above the horizontal moving plate 253. The middle part of the horizontal moving plate 253 is provided with a through hole 2532. The connecting rod 256 penetrates through the through hole 2532 on the horizontal moving plate 253 and is fixed between the cam 255 and the moving plate 23. When the cam 255 moves to the lower horizontal groove 25212, the height of the lower guard plate 13 on the moving plate 23 is lower than that of the lower bottom surface of the moving plate 22.

[0027] The lifting assembly 25 realizes the lifting action of the second moving plate 23 through a mechanical linkage. When the second moving plate 23 moves with the synchronous assembly 24, the cam 255 fixed below the second moving plate 23 rolls along the path groove 2521 on the path plate 252. During the switching of the workstations, the cam 255 slides from the upper transverse groove 25211 at both ends of the path groove 2521 into the lower transverse groove 25212 in the middle, and drives the second moving plate 23 to stably descend along the four guide rods 254 through the connecting rod 256, so that the lower guard plate 13 is lowered to a height below the lower bottom surface of the first moving plate 22, and the barrier-free crossing is realized. After the position switching is completed, the cam 255 reenters the upper transverse groove 25211, and the second moving plate 23 returns to the working height. The entire process is guided by the slide rails on the inner stand plate 251 and the synchronous movement of the transverse plate 253 to ensure the movement accuracy and realize the seamless switching of the double workstations.

[0028] With reference to Figure 3 , Figure 4 and Figure 5 continuously, the synchronous assembly 24 is connected between the first moving plate 22 and the second moving plate 23, and is used to drive the second moving plate 23 to move reversely synchronously with the first moving plate 22, and to exchange the positions of the first moving plate 22 and the second moving plate 23. Specifically, the synchronous assembly 24 is provided with two groups and is installed on the inner walls of the two outer side plates 211 of the box body 21 respectively; the synchronous assembly 24 includes a synchronous wheel one 241, a synchronous wheel two 242, and a synchronous belt 243; the synchronous wheel one 241 is provided with four and is rotatably installed at two ends of the box body 21 in pairs; the synchronous wheel two 242 is located between the two synchronous wheel ones 241 at one end, and is transversely adjusted to be arranged at a distance from the synchronous wheel one 241 at the other end; the synchronous belt 243 is wound around the synchronous wheel two 242 and the two synchronous wheel ones 241 at the ends; wherein the first moving plate 22 and the transverse plate 253 are fixedly connected with the upper belt and the lower belt of the synchronous belt 243 respectively. In addition, the transverse adjustment of the synchronous wheel two 242 can be a waist-shaped hole opened on the outer side plate 211, and the synchronous wheel two 242 is fixed on the waist-shaped hole. When it is necessary to adjust the tension of the synchronous belt 243, the fixed position of the synchronous wheel two 242 can be changed to realize the adjustment.

[0029] The synchronous assembly 24 realizes the synchronous movement of the double workstations through a belt drive system: two groups of symmetrical synchronous wheel ones 241 and the position-adjustable synchronous wheel two 242 form a closed-loop drive system, and the synchronous belt 243 forms an upper and lower parallel transmission belt around it; when the linear module 31 drives the first moving plate 22 to move, the synchronous belt is driven to operate through the fixed connection of the first moving plate 22 with the upper belt of the synchronous belt 243, and the lower belt of the synchronous belt 243 drives the second moving plate 23 to make a completely synchronous reverse movement through the transverse plate 253; the synchronous wheel two 242 is installed through the waist-shaped hole to realize the adjustable tension, and ensures the transmission accuracy; the design makes the first moving plate 22 and the second moving plate 23 always maintain a precise 1:1 reverse motion relationship, realizes the accurate position exchange of the two test workstations, and completes the seamless workstation switching with the lifting assembly 25.

[0030] Referring to Figure 1 and Figure 2 The displacement driving module includes a linear module 31 fixed to the outer side plate 211 of one side of the box body 21 and a connecting block 32 connected between the linear module 31 and the moving plate 22. The wires in the test base 11 on the moving plate 22 are led out from the side and extend to the outside of the outer side plate 211 of the box body 21 under the support of the extension plate 4; the wires in the test base 11 on the moving plate 23 are led out from the back and extend downward into the box body 21 and then extend out from the opening on the box body 21. In this way, the wires in the test base 11 on the moving plate 22 and the moving plate 23 do not affect the switching of the two test stations between the test position and the loading and unloading position.

[0031] The displacement driving module provides accurate power output through the linear module 31, and the connecting block 32 transmits the power to the moving plate 22 to realize linear motion. The module adopts an optimized wire layout design: the wires of the test base 11 on the moving plate 22 are led out laterally and extend to the outside of the box body 21, and the wires of the moving plate 23 are led out downward through the bottom opening. This three-dimensional wiring method ensures that the wires are always arranged in order during the switching of the stations and do not cause entanglement or interference. The high-precision control of the linear module 31 cooperates with the special wire path design to ensure smooth and alternating movement of the double stations and effectively solve the common cable interference problem of traditional test fixtures, making the equipment run more reliably and stably.

[0032] The detection tool also includes a multi-sensor array and an edge computing unit. The multi-sensor array includes an optical camera that can be pushed by a mechanical module in the test machine to the lower side of the test module for collecting optical images of the PCBA board to be tested at the test position. The edge computing unit is used for feature point matching between the collected images and standard images. The multi-sensor array also includes an infrared thermal imager for monitoring the temperature distribution of the PCBA board to be tested.

[0033] The functional principle of the present application can be described as follows:

[0034] The detection tool adopts a double-station cooperative working mechanism. When the mobile plate 1 22 carries the PCBA board to be detected into the test position, the top plate 14 and the upper guard plate 15 on the test module are pressed down to complete the electrical detection, and the mobile plate 2 23 is automatically moved to the loading and unloading position outside the tester to perform loading and unloading. The linear module 31 drives the two mobile plates to move reversely and synchronously through the synchronous assembly 24. The cam 255 of the lifting assembly 25 moves along the path groove 2521, and when the station is switched, the mobile plate 2 23 is accurately lowered to avoid the mobile plate 1 22, realizing double-station non-interference alternating operation. In cooperation with the machine vision positioning system, a continuous working cycle with loading and unloading in the test is formed, and the comprehensive efficiency of the equipment is improved.

[0035] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the spirit and scope of the present application. Thus, it is intended that the present application cover the modifications and changes as falling within the scope of the claims and their equivalents.

[0036] The above is only a preferred specific implementation of the embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solutions and concepts of the present application within the technical range disclosed by the present application, and these should be covered within the protection scope of the present application.

Claims

1. A PCBA board detection tool, characterized in that, The application relates to a double-station test module for a test machine. The double-station test module comprises: a test module including a top plate (14) and an upper guard plate (15) fixedly installed on a lower moving mechanism of a test machine; a double-station test module including two switchable test stations, each test station comprising a test base (11), a probe plate (12) and a lower guard plate (13); a moving drive module for controlling the two test stations to be switched between a test position and a loading and unloading position, the test position being directly below the test module, and the loading and unloading position being outside the test machine; 2. The PCBA board detection tool of claim 1, wherein, wherein when one test station is in the test position, the other test station is in the loading and unloading position and is used for loading and unloading. The double-station test module comprises: a box body (21) having an empty cavity inside and an open top; a moving plate one (22) as one test station, horizontally slidingly arranged on the top surface of the box body (21) and being switched between the test position and the loading and unloading position; a moving plate two (23) as the other test station, symmetrically arranged at two ends of the box body (21) with the moving plate one (22) and being switched between the test position and the loading and unloading position; a synchronization assembly (24) connected between the moving plate one (22) and the moving plate two (23) for driving the moving plate two (23) to reversely move synchronously with the moving plate one (22) and enabling the moving plate one (22) and the moving plate two (23) to exchange positions; a lifting assembly (25) for driving the moving plate two (23) to pass through the moving plate one (22) during the synchronous reverse movement of the moving plate two (23) and the moving plate one (22); 3. The PCBA board inspection tool of claim 2, wherein, wherein the moving plate one (62) and the moving plate two (64) are fixedly installed with the test base (1), the probe plate (2) and the lower guard plate (3). The lifting assembly (25) comprises: an inner vertical plate (251) having a height lower than that of an outer vertical plate (211) of the box body (21); a path plate (252) having a height lower than that of the inner vertical plate (251), the path plate (252) being provided with a path groove (2521), the path groove (2521) comprising an upper horizontal groove (25211) located at two ends of the path plate (252) and close to the top surface and a lower horizontal groove (25212) located at the middle of the path plate (252) and close to the bottom surface; a horizontal moving plate (253) slidingly arranged on the top surface of the inner vertical plate (251), the moving plate two (23) being located directly above the horizontal moving plate (253); four guide rods (254) vertically arranged at four corners of the horizontal moving plate (253), the top ends of the guide rods (254) being fixed to the lower bottom surface of the moving plate two (23) and the bottom ends penetrating through the horizontal moving plate (253); a cam (255) rollingly arranged in the path groove (2521); 4. The PCBA board inspection tool of claim 3, wherein, a connecting rod (256) penetrating through the horizontal moving plate (253) and fixed between the cam (255) and the moving plate two (23). The synchronization assembly (24) comprises: four synchronization wheels (241) rotatably arranged at two ends of the box body (21) in pairs; A second synchronous wheel (242) is located between two first synchronous wheels (241) at one end, and the distance between the first synchronous wheel (241) at the end and the second synchronous wheel (242) is adjusted horizontally; A synchronous belt (243) is arranged around the second synchronous wheel (242) and the two first synchronous wheels (241); The first moving plate (22) and the horizontal moving plate (253) are fixedly connected with the upper and lower belts of the synchronous belt (243), respectively.

5. The PCBA board inspection tool of claim 3, wherein, The displacement driving module comprises a linear module (31) and a connecting block (32), the linear module (31) is fixed to the outer side plate (211) on one side of the box body (21), and the connecting block (32) is connected between the linear module (31) and the first moving plate (22).

6. The PCBA board inspection tool of claim 1, wherein, Further comprising: A multi-sensor array comprising an optical camera for collecting an optical image of the PCBA board to be measured; An edge computing unit for matching feature points between the collected image and a standard image.

7. The PCBA board inspection tool of claim 6, wherein, The multi-sensor array further comprises an infrared thermal imager for monitoring the temperature distribution of the PCBA board to be measured.

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