A continuous PCBA electrical performance testing device

Abstract

The utility model discloses a continuous PCBA electric property testing arrangement belongs to PCBA electric property testing technical field, including testing machine, the end fixedly connected with of testing machine has the placement utensil, the inner wall rotationally connected with of placement utensil has two -way screw rod, one end fixedly connected with of two -way screw rod has servo motor, still include protection mechanism, the protection mechanism includes the sliding frame of sliding connection in the inner wall both sides of placement utensil, the inner wall sliding connection with of sliding frame has rubber block, the inner wall screw connection of sliding frame is in the surface of two -way screw rod, both sides fixedly connected with of sealing sleeve of sliding frame, the other end fixedly connected with of sealing sleeve is at one side of placement utensil, one side fixedly connected with of sliding frame has pressure sensor. Through above -mentioned mode, the surface of two -way screw rod is protected through sealing sleeve, avoids two -way screw rod to be exposed to the air, and then reduces the abrasion between two -way screw rod and sliding frame, thereby accurately controls the clamping intensity to PCBA.

Description

Technical Field

[0001] This utility model relates to the field of PCBA electrical performance testing technology, and specifically to a continuous PCBA electrical performance testing device. Background Technology

[0002] The PCBA electrical performance testing device is based on electrical principles. It applies a specific electrical signal to the printed circuit board assembly, measures the response signal of the printed circuit board assembly, and compares the measurement results with preset standard parameters to determine whether the printed circuit board assembly has defects such as short circuits, open circuits, or abnormal component values.

[0003] According to the search, the Chinese patent "A PCBA Electrical Performance Testing Clamping Device" authorized announcement number "CN218496981U" uses a threaded rod, a movable clamping block, a drive motor, a clamping fixing plate, and a clamping rubber plate to cooperate with each other to achieve clamping and positioning of the PCBA. After the clamping rubber plate clamps the PCBA, the drive motor is automatically stopped by a gravity sensor to ensure the stability of the PCBA during electrical performance testing.

[0004] In the aforementioned application, because the surface of the threaded rod is exposed, external impurities can easily adhere to the surface of the threaded rod. The threaded rod frequently drives the moving clamping block and the clamping rubber plate to clamp and position the PCBA, which can easily cause damage to the threaded rod and the moving clamping block, making it difficult to accurately control the clamping force on the PCBA.

[0005] Based on this, the present invention designs a continuous PCBA electrical performance testing device to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a continuous PCBA electrical performance testing device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A continuous PCBA electrical performance testing device includes a testing machine, a placement fixture fixedly connected to one end of the testing machine, a bidirectional lead screw rotatably connected to the inner wall of the placement fixture, a servo motor fixedly connected to one end of the bidirectional lead screw, and a protective mechanism. The protective mechanism includes a sliding frame slidably connected to both sides of the inner wall of the placement fixture, a rubber block slidably connected to the inner wall of the sliding frame, a threaded connection between the inner wall of the sliding frame and the surface of the bidirectional lead screw, sealing sleeves fixedly connected to both sides of the sliding frame, the other end of the sealing sleeves fixedly connected to one side of the placement fixture, a pressure sensor fixedly connected to one side of the sliding frame, and a one-way vent pipe communicating with the inner wall of the sliding frame.

[0009] Furthermore, the inner wall of the sliding frame is provided with a liquid guiding groove and a liquid outlet hole, and the liquid guiding groove and the liquid outlet hole are connected.

[0010] Furthermore, the inner wall of the placement device is slidably connected with two guide blocks, and the guide blocks are fixedly connected to the opposite end of the placement device with a second spring.

[0011] Furthermore, the inner wall of the liquid guiding groove is fitted with a plug, and the sealing sleeve, plug, and guide block are all rubber components.

[0012] Furthermore, a first spring is fixedly connected to one side of the rubber block, and the other end of the first spring is fixedly connected to the inner wall of the sliding frame.

[0013] Furthermore, the inner wall of the sliding frame is connected to a one-way air intake pipe.

[0014] Furthermore, a magnetic ring is fixedly connected to the surface of the one-way air intake pipe, and a filter frame is snapped onto the surface of the one-way air intake pipe.

[0015] Furthermore, the surface of the filter frame is slidably connected to the inner wall of the magnetic ring, the surface of the filter frame is an iron component, and the surface of the filter frame is magnetically attracted to the surface of the magnetic ring.

[0016] Furthermore, the inner wall of the sliding frame is slidably connected to a locking block, the surface of which engages with the inner wall of the blocking block.

[0017] Furthermore, a limiting rope is fixedly connected to the bottom of the block, and the other end of the limiting rope is fixedly connected to the front end of the sliding frame.

[0018] Beneficial effects

[0019] 1. By using a sealing sleeve to protect the surface of the bidirectional lead screw, the bidirectional lead screw is prevented from being exposed, thereby reducing the wear between the bidirectional lead screw and the slide frame, and thus accurately controlling the clamping force on the PCBA;

[0020] 2. By cooperating with the liquid guide groove and the liquid outlet, lubricating oil can be applied to the surface of the bidirectional lead screw and the inner wall of the slide frame, thereby reducing the wear between the bidirectional lead screw and the slide frame and ensuring precise control of the PCBA clamping force. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural view of the main body of a continuous PCBA electrical performance testing device according to the present invention;

[0023] Figure 2 This is a cross-sectional view of the placement fixture and protective mechanism of a continuous PCBA electrical performance testing device according to this utility model;

[0024] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0026] The labels in the diagram represent:

[0027] 100. Testing machine; 200. Placement fixture; 300. Two-way lead screw; 400. Servo motor; 500. Protective mechanism; 501. Sliding frame; 502. Rubber block; 503. Pressure sensor; 504. One-way air outlet pipe; 505. Sealing sleeve; 506. Liquid guide groove; 507. Liquid outlet hole; 508. Block; 509. Limiting rope; 510. First spring; 511. One-way air inlet pipe; 512. Magnetic ring; 513. Filter frame; 514. Guide block; 515. Second spring; 516. Locking block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] In some embodiments, please refer to the appendix to the instruction manual. Figure 1-4A continuous PCBA electrical performance testing device includes a testing machine 100, a placement fixture 200 fixedly connected to one end of the testing machine 100, a bidirectional lead screw 300 rotatably connected to the inner wall of the placement fixture 200, a servo motor 400 fixedly connected to one end of the bidirectional lead screw 300, and a protective mechanism 500. The protective mechanism 500 includes a sliding frame 501 slidably connected to both sides of the inner wall of the placement fixture 200, a rubber block 502 slidably connected to the inner wall of the sliding frame 501, a threaded connection between the inner wall of the sliding frame 501 and the surface of the bidirectional lead screw 300, sealing sleeves 505 fixedly connected to both sides of the sliding frame 501, the other end of the sealing sleeve 505 fixedly connected to one side of the placement fixture 200, a pressure sensor 503 fixedly connected to one side of the sliding frame 501, and a one-way vent pipe 504 communicating with the inner wall of the sliding frame 501. A certain amount of gas is stored inside the sliding frame 501.

[0031] The testing machine 100 includes a testing platform, an electric push rod, a PLC controller and a detector, and the surface of the servo motor 400 is fixedly connected to one side of the placement device 200.

[0032] In this embodiment of the utility model, when electrical performance testing of a PCBA is required, a suitable testing machine 100 is selected and powered on. Then, debugging and calibration are performed to ensure its accuracy and reliability. The PCBA to be tested is placed in the placement fixture 200. The PLC controller is operated to automatically start the servo motor 400. The output shaft of the servo motor 400 rotates, driving the bidirectional lead screw 300 to rotate. The rotation of the bidirectional lead screw 300 drives the two sliding frames 501 to move closer to each other, so that one side of the rubber block 502 contacts the side of the PCBA. At this time, the rotation of the bidirectional lead screw 300 drives the sliding frame 501 to continue moving, so that the inner wall of the sliding frame 501 slides on the surface of the rubber block 502, thereby pushing some of the gas inside the sliding frame 501 to be discharged through the one-way vent pipe 504. The sliding frame 501 drives the pressure sensor 503 to move towards the rubber block 502, so that one end of the pressure sensor 503 abuts against one side of the rubber block 502. The servo motor 400 is automatically turned off, so that the two rubber blocks 502 flexibly clamp the PCBA with equal pressure.

[0033] The PLC controller automatically activates the electric actuator, causing its extension end to move downwards, bringing the detector down to contact the PCBA. This provides power to the PCBA, putting it into normal operating condition. Various test signals are then input to simulate its actual operating environment. The testing machine 100 measures and analyzes the PCBA's output signals to check its functionality and performance against design requirements. For example, a signal generator is used to input signals of different frequencies and amplitudes, and the signals displayed on the PLC controller's screen are observed to test the PCBA's signal processing capabilities.

[0034] After the test is completed, the control system transmits the collected test data to data analysis software for processing and analysis. The data analysis software compares the measurement results with preset standard parameters to determine whether the PCBA is qualified.

[0035] If the test results are within the standard range, the PCBA is deemed qualified; if the test results exceed the standard range, the PCBA is deemed unqualified, and the specific fault point and fault type are marked.

[0036] The PCBA is continuously placed into the placement fixture 200 for clamping and positioning in the manner described above, and then tested.

[0037] In this embodiment of the utility model, the surface of the bidirectional lead screw 300 is protected by the sealing sleeve 505, which prevents the bidirectional lead screw 300 from being exposed, thereby reducing the wear between the bidirectional lead screw 300 and the slide frame 501, and thus accurately controlling the clamping force on the PCBA.

[0038] By cooperating with the sliding frame 501, rubber block 502, one-way air outlet pipe 504 and pressure sensor 503, flexible constant pressure clamping of PCBA is achieved, which reduces the damage to PCBA during clamping and ensures the effectiveness of PCBA electrical performance testing.

[0039] In some embodiments, such as Figure 3 As shown, in a preferred embodiment of the present invention, the inner wall of the sliding frame 501 is provided with a liquid guiding groove 506 and a liquid outlet hole 507. The liquid guiding groove 506 and the liquid outlet hole 507 are connected. A block 508 is engaged with the inner wall of the liquid guiding groove 506. The sealing sleeve 505, the block 508 and the guide block 514 are all rubber components. A locking block 516 is slidably connected to the inner wall of the sliding frame 501. The surface of the locking block 516 is engaged with the inner wall of the block 508. A limiting rope 509 is fixedly connected to the bottom of the block 508. The other end of the limiting rope 509 is fixedly connected to the front end of the sliding frame 501.

[0040] In this embodiment of the invention, when the bidirectional lead screw 300 needs lubrication, the locking block 516 is pulled upwards away from the blocking block 508, and the blocking block 508 is pulled away from the liquid guide groove 506. A certain amount of mineral oil-based lubricating oil is poured into the liquid guide groove 506, allowing the lubricating oil in the liquid guide groove 506 to flow through the liquid outlet 507 to the surface of the bidirectional lead screw 300. At this time, the PLC controller is operated to automatically start the servo motor 400, causing the bidirectional lead screw 300 to rotate and the slide frame 501 to move linearly, thereby applying the lubricating oil to the surface of the bidirectional lead screw 300 and the inner wall of the slide frame 501. After application, the blocking block 508 is locked into the liquid guide groove 506, the locking block 516 is inserted into the slide frame 501 and pushed downwards to lock into the blocking block 508.

[0041] In this embodiment of the utility model, the liquid guide groove 506 and the liquid outlet hole 507 cooperate to apply lubricating oil to the surface of the bidirectional lead screw 300 and the inner wall of the slide frame 501, thereby reducing the wear between the bidirectional lead screw 300 and the slide frame 501 and ensuring precise control of the PCBA clamping force.

[0042] By cooperating with the blocking block 508 and the clamping block 516, the liquid guiding groove 506 is sealed, preventing impurities from adhering to the surface of the bidirectional lead screw 300 through the liquid guiding groove 506 and the liquid outlet 507.

[0043] In some embodiments, such as Figure 2 and Figure 4 As shown, in a preferred embodiment of this utility model, two guide blocks 514 are slidably connected to the inner wall of the placement device 200. A second spring 515 is fixedly connected to the opposite end of the guide block 514 and the placement device 200. A first spring 510 is fixedly connected to one side of the rubber block 502. The other end of the first spring 510 is fixedly connected to the inner wall of the slide frame 501. A one-way air inlet pipe 511 is connected to the inner wall of the slide frame 501. A magnetic ring 512 is fixedly connected to the surface of the one-way air inlet pipe 511. A filter frame 513 is snapped onto the surface of the one-way air inlet pipe 511. The surface of the filter frame 513 is slidably connected to the inner wall of the magnetic ring 512. The surface of the filter frame 513 is an iron component. The surface of the filter frame 513 is magnetically attracted to the surface of the magnetic ring 512.

[0044] In this embodiment of the invention, the PCBA is placed in the placement container 200, and the elastic force of the second spring 515 pushes the guide block 514 to move and contact the side of the PCBA, thereby initially positioning the PCBA and ensuring accurate clamping of the PCBA.

[0045] The linear movement of the slide frame 501 causes the rubber block 502 to move away from the PCBA. At this time, the elastic force of the first spring 510 pushes the rubber block 502 to move, causing suction to be generated inside the slide frame 501. Outside air flows into the slide frame 501 after being filtered through the filter frame 513.

[0046] It should be noted that the testing machine 100, placement fixture 200, bidirectional lead screw 300, servo motor 400, pressure sensor 503, magnetic ring 512, filter frame 513, first spring 510 and second spring 515 mentioned above are all devices with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the testing machine 100, servo motor 400 and pressure sensor 503 can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. 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. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A continuous PCBA electrical performance testing device, comprising a testing machine (100), wherein a placement fixture (200) is fixedly connected to one end of the testing machine (100), a bidirectional lead screw (300) is rotatably connected to the inner wall of the placement fixture (200), and a servo motor (400) is fixedly connected to one end of the bidirectional lead screw (300), characterized in that: It also includes a protective mechanism (500), which includes a sliding frame (501) slidably connected to both sides of the inner wall of the placement container (200). A rubber block (502) is slidably connected to the inner wall of the sliding frame (501). The inner wall of the sliding frame (501) is threadedly connected to the surface of a two-way lead screw (300). A sealing sleeve (505) is fixedly connected to both sides of the sliding frame (501). The other end of the sealing sleeve (505) is fixedly connected to one side of the placement container (200). A pressure sensor (503) is fixedly connected to one side of the sliding frame (501). A one-way air outlet pipe (504) is connected to the inner wall of the sliding frame (501).

2. The continuous PCBA electrical performance testing device according to claim 1, characterized in that, The inner wall of the sliding frame (501) is provided with a liquid guiding groove (506) and a liquid outlet hole (507), and the liquid guiding groove (506) and the liquid outlet hole (507) are connected.

3. The continuous PCBA electrical performance testing device according to claim 2, characterized in that, The inner wall of the placement device (200) is slidably connected with two guide blocks (514), and the guide blocks (514) are fixedly connected with the opposite ends of the placement device (200) by a second spring (515).

4. The continuous PCBA electrical performance testing device according to claim 3, characterized in that, The inner wall of the liquid guiding groove (506) is fitted with a plug (508), and the sealing sleeve (505), the plug (508) and the guide block (514) are all rubber components.

5. The continuous PCBA electrical performance testing device according to claim 1, characterized in that, A first spring (510) is fixedly connected to one side of the rubber block (502), and the other end of the first spring (510) is fixedly connected to the inner wall of the slide frame (501).

6. The continuous PCBA electrical performance testing device according to claim 1, characterized in that, The inner wall of the slide frame (501) is connected to a one-way air intake pipe (511).

7. The continuous PCBA electrical performance testing device according to claim 6, characterized in that, A magnetic ring (512) is fixedly connected to the surface of the one-way air intake pipe (511), and a filter frame (513) is snapped onto the surface of the one-way air intake pipe (511).

8. The continuous PCBA electrical performance testing device according to claim 7, characterized in that, The surface of the filter frame (513) is slidably connected to the inner wall of the magnetic ring (512). The surface of the filter frame (513) is an iron component, and the surface of the filter frame (513) is magnetically attracted to the surface of the magnetic ring (512).

9. The continuous PCBA electrical performance testing device according to claim 4, characterized in that, The inner wall of the sliding frame (501) is slidably connected to a locking block (516), and the surface of the locking block (516) is engaged with the inner wall of the blocking block (508).

10. The continuous PCBA electrical performance testing device according to claim 4, characterized in that, The bottom of the block (508) is fixedly connected to a limiting rope (509), and the other end of the limiting rope (509) is fixedly connected to the front end of the slide frame (501).

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