PCB circuit board electrical testing device

Abstract

The application discloses a PCB circuit board electric testing device and belongs to the technical field of electric testing. Mainly including a base, a test frame is arranged between the base, a test mechanism is installed on the side wall of the test frame, the test mechanism is provided with a horizontal moving assembly and a vertical moving assembly, the horizontal moving assembly is provided with a first sliding block, the vertical moving assembly is provided with a second sliding block, a crossbeam is installed on the first sliding block, a cleaning assembly is installed on the upper end of the test frame, the cleaning assembly comprises an air pipe installed on the upper end of the test frame, and a spray head is arranged at the lower end of the air pipe. The PCB circuit board electric testing device has the effect of cleaning the pollutants on the surface of the PCB circuit board through the air pipe and the spray head.

Description

Technical Field

[0001] This application relates to the field of electrical testing technology, specifically to electrical testing devices for PCB circuit boards. Background Technology

[0002] In the field of electronics manufacturing, PCB circuit boards, as the core carriers of electronic components, directly affect the reliability of end products due to their electrical connectivity performance. Therefore, it is necessary to conduct corresponding tests on PCB circuit boards.

[0003] Flying probe testing is currently the mainstream electrical testing method. It uses a program to control the probe to move to the test point, apply a test signal and collect feedback, thereby quickly detecting open circuits, short circuits and impedance abnormalities on the circuit board.

[0004] For example, patent CN217007593U discloses a flying probe tester. This patent uses a cantilever structure to drive multiple flying probes distributed on both sides of the frame to perform three-dimensional motion, contact the test points on the circuit board and transmit electrical signals to achieve electrical performance testing.

[0005] However, during the cutting, transportation and storage of PCB circuit boards, solder dross particles, fiber debris or flux residue may adhere to the surface. When the probe touches the test point containing contaminants, the contaminants will form a local insulating layer or conductive bridge, which will lead to abnormal test results.

[0006] Therefore, it is necessary to provide PCB circuit board electrical testing equipment to solve the above problems.

[0007] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0008] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a PCB circuit board electrical testing device, which solves the problem that solder dross particles, fiber debris or flux residue may adhere to the surface of the PCB circuit board, forming a local insulating layer or conductive bridging, thereby causing abnormal test results.

[0009] The technical solution adopted by this application to solve its technical problem is: a PCB circuit board electrical testing device, comprising:

[0010] A base, with test frames set between the bases;

[0011] The testing mechanism is installed on the side wall of the testing frame. The testing mechanism has a horizontal moving component and a vertical moving component. The horizontal moving component has a first slider, and the vertical moving component has a second slider.

[0012] A crossbeam, which is mounted on the first slider;

[0013] A cleaning component, mounted on the upper end of the test frame, includes:

[0014] A trachea is installed at the upper end of the test frame;

[0015] The nozzle is installed at the lower end of the air pipe.

[0016] Furthermore, a telescopic rod is provided on the other side of the crossbeam;

[0017] A spring, which is mounted on the telescopic rod;

[0018] A fixing seat is installed at the end of the telescopic rod;

[0019] A roller brush is disposed between the fixed bases.

[0020] Furthermore, a receiving box is provided on the inner wall of the test frame directly below the nozzle.

[0021] Furthermore, the telescopic rod includes a fixed sleeve fixedly disposed on the other side of the crossbeam and a sliding rod slidably disposed inside the fixed sleeve.

[0022] Furthermore, the surface of the roller brush is provided with soft bristles.

[0023] Furthermore, a probe is provided on the second slider, and the roller brush is installed ahead of the probe.

[0024] The beneficial effects of this application are: the PCB circuit board electrical testing device provided by this application achieves the effect of cleaning contaminants on the surface of the PCB circuit board by setting up air pipes and nozzles.

[0025] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0027] In the attached diagram:

[0028] Figure 1 This is an overall schematic diagram of the PCB circuit board electrical testing device in this application;

[0029] Figure 2 This is a partial schematic diagram of the PCB circuit board electrical testing device in this application;

[0030] Figure 3 for Figure 1 A schematic diagram of the vertical shifting component;

[0031] Figure 4 for Figure 1 Exploded view of the vertical shifting component;

[0032] Figure 5 for Figure 1 A schematic diagram of A in the middle;

[0033] Figure 6 for Figure 4 A schematic diagram of B in the middle;

[0034] The following are the labeling elements in the figure:

[0035] 1. Base; 2. Test frame; 3. Test mechanism; 30. Horizontal movement assembly; 31. First slider; 32. Crossbeam; 33. Vertical movement assembly; 34. Second slider; 36. Probe; 37. Clamping assembly; 370. Slide rail; 371. Third slider; 372. Upper clamping plate; 373. Lower clamping plate; 374. Cylinder; 38. Cleaning assembly; 380. Telescopic rod; 381. Spring; 382. Roller brush; 383. Air pipe; 384. Nozzle; 385. Receiver box; 386. Fixing base. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0038] like Figures 1-3 As shown, the PCB circuit board electrical testing device provided in this application is mainly used in electronic manufacturing production lines to automatically test the electrical performance of PCB circuit boards through flying probe testing. Specifically, the PCB circuit board electrical testing device includes two sets of bases 1, and a test frame 2 is fixedly installed between the bases 1. A rectangular test slot is opened in the middle of the test frame 2, and the PCB circuit board to be tested is placed in this slot for flying probe testing.

[0039] In order to carry out subsequent testing operations, a testing mechanism 3 is provided on the side wall of the test frame 2. The testing mechanism includes clamping components 37 symmetrically arranged inside the test frame 2. The clamping components 37 include slide rails 370 vertically installed on both sides of the inner wall of the test frame 2. A third slider 371 is slidably arranged on the slide rails 370, and an upper clamping plate 372 is fixedly arranged between the two sets of third sliders 371.

[0040] Meanwhile, a cylinder 374 is fixedly installed on the upper end of the test frame 2. The output end of the cylinder 374 penetrates the top wall of the test frame 2 downward and is fixedly connected to the top of the upper clamping plate 372. Thus, when the cylinder 374 is activated, the upper clamping plate 372 can be pushed to move vertically up and down along the slide rail 370.

[0041] Furthermore, a lower clamping plate 373 is horizontally set at the bottom of the test slot. The lower clamping plate 373 is located directly below the upper clamping plate 372. The upper clamping plate 372 and the lower clamping plate 373 are both provided with slots on their opposite surfaces. The depth of the slots matches the thickness of the PCB circuit board. Thus, when the cylinder 374 drives the upper clamping plate 372 to press down, the PCB circuit board can be clamped between the two slots to avoid test displacement.

[0042] To enable subsequent testing operations, a transverse component 30 is installed at both the upper and lower ends of the test frame 2. The transverse component 30 is a motor-driven lead screw and slide rail structure in the prior art. The transverse component 30 has a first slider 31 suitable for sliding, so that the first slider 31 can move laterally along the side wall of the test frame 2.

[0043] Meanwhile, a crossbeam 32 is fixedly installed on the first slider 31, and the span of the crossbeam 32 matches the maximum width of the circuit board, so that flying probe testing can be performed on the PCB circuit board in the future.

[0044] Furthermore, a vertical movement component 33 is provided on one side of the crossbeam 32. The vertical movement component 33 also adopts the existing motor-driven lead screw slide rail structure. The vertical movement component 33 has a second slider 34, so that the second slider 34 can move up and down along the height direction of the crossbeam 32. At the same time, a probe 36 is provided on the second slider 34. The tip of the probe 36 points to the PCB test point and is connected to the tester through a wire to facilitate subsequent testing operations.

[0045] It should be noted that the probe 36 can be driven by an external drive component, which can be a hydraulic cylinder or an electric cylinder, so as to drive the probe 36 to contact the PCB circuit board surface for subsequent testing.

[0046] Therefore, during testing, the horizontal movement component 30 can drive the horizontal beam 32 to move laterally, and then the vertical movement component 33 controls the vertical positioning of the probe 36, so that the probe 36 contacts each test point on the PCB according to the preset path, and completes the electrical performance test by measuring parameters such as circuit continuity and impedance.

[0047] To eliminate interference from contaminants on the PCB board surface, such as Figure 1 and Figures 3-6 As shown, a cleaning component 38 is added to the top of the test frame 2. The cleaning component 38 achieves the effect of cleaning the PCB board surface through two stages: Specifically, the cleaning component 38 includes an air pipe 383 set at the upper end of the test frame 2. The air inlet end of the air pipe 383 is connected to an external air pump so that air can be pumped into the air pipe 383 by the external air pump for subsequent cleaning operations.

[0048] Meanwhile, multiple nozzles 384 are arrayed at the bottom of the air tube 383. It should be noted that the nozzles 384 point to the surface of the PCB circuit board inside the test tank. Thus, when the air pump is started, the high-pressure airflow is sprayed onto the circuit board through the nozzles 384, blowing away the loose particles.

[0049] Furthermore, a receiving box 385 is detachably installed on the inner wall of the test frame 2 directly below the nozzle 384. This receiving box 385 is used to receive the pollutants blown off, and can be disassembled and cleaned after the blowing is finished.

[0050] To further clean the PCB board surface, telescopic rods 380 are provided at both ends of the other side of the crossbeam 32. The telescopic rod 380 includes a fixed sleeve fixedly installed on the other side of the crossbeam 32 and a sliding rod slidably installed inside the fixed sleeve. A spring 381 is fixedly installed between the sliding rod and the fixed sleeve, and a fixed seat 386 is fixedly connected to the end of the sliding rod. A roller brush 382 is rotatably installed between the two sets of fixed seats 386. The surface of the roller brush 382 is provided with soft bristles so that contaminants on the surface of the PCB board can be brushed off later.

[0051] It should be noted that the roller brush 382 is kept in contact with the PCB circuit board surface by the pre-pressure of the spring 381, and the roller brush 382 is installed ahead of the probe 36. So when the transverse component 30 drives the crossbeam 32 to move laterally, the roller brush 382 rolls and adheres the residual particles first, and the probe 36 then arrives at the cleaned area for testing, thereby further preventing surface contaminants from affecting the test.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A PCB circuit board electrical testing device, characterized in that: include: A base (1), with test frames (2) arranged between the bases (1); The test mechanism (3) is installed on the side wall of the test frame (2). The test mechanism (3) has a horizontal moving component (30) and a vertical moving component (33). The horizontal moving component (30) has a first slider (31) and the vertical moving component (33) has a second slider (34). A crossbeam (32) is mounted on the first slider (31); A cleaning component (38) is mounted on the upper end of the test frame (2), and the cleaning component (38) includes: A trachea (383) is installed on the upper end of the test frame (2); Nozzle (384) is installed at the lower end of the air pipe (383).

2. The PCB circuit board electrical testing device according to claim 1, characterized in that: A telescopic rod (380) is provided on the other side of the crossbeam (32); A spring (381) is mounted on the telescopic rod (380); A fixing seat (386) is installed at the end of the telescopic rod (380); A roller brush (382) is disposed between the fixed seats (386).

3. The PCB circuit board electrical testing device according to claim 1, characterized in that: A receiving box (385) is provided on the inner wall of the test frame (2) directly below the nozzle (384).

4. The PCB circuit board electrical testing device according to claim 2, characterized in that: The telescopic rod (380) includes a fixed sleeve fixedly disposed on the other side of the crossbeam (32) and a sliding rod slidably disposed inside the fixed sleeve.

5. The PCB circuit board electrical testing device according to claim 2, characterized in that: The surface of the roller brush (382) is provided with soft bristles.

6. The PCB circuit board electrical testing device according to claim 2, characterized in that: The second slider (34) is provided with a probe (36), and the roller brush (382) is installed ahead of the probe (36).

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