PCB flying probe testing device and testing method thereof

Abstract

The invention relates to the technical field of PCB soft board testing, in particular to a PCB flying probe testing device and a testing method thereof. A test arm for flying probe detection of the soft board is mounted above the base; the bottom of the test arm is provided with a flexible board surface treatment module, the two sides of the flexible board surface treatment module are fixedly connected with hollow frames, the interiors of the hollow frames are fixedly connected with hydraulic rods, and the free ends of the hydraulic rods are fixedly connected with rectangular plates. The transverse pipe drives the hollow frame and the rectangular plate to move downwards, the downward pressing modules at the bottoms of the transverse pipe, the hollow frame and the rectangular plate move downwards at the moment, rubber pads at the bottoms of the downward pressing modules make contact with the soft plate, the purpose of fixing the soft plate can be achieved at the moment, it can be guaranteed that the rubber pads have certain buffering performance under the action of springs, and it is guaranteed that the soft plate is stably extruded; the condition that the soft board moves along with the flying probe test is avoided, and the stable test is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of PCB soft board testing, in particular to a PCB flying probe testing device and a testing method thereof. Background Art

[0002] Flexible circuit boards are also called flexible circuit boards or flexible circuit boards. Referred to as soft boards or FPCs, compared to ordinary hard resin circuit boards, flexible circuit boards have the advantages of high wiring density, light weight, thin thickness, less wiring space restrictions, and high flexibility.

[0003] Flying probe test is an effective way to detect the integrity of the circuit of a circuit board. It connects the end points on the circuit board through contacts to measure the conduction between the two end points. When testing traditional hard boards, the board can be squeezed and fixed, and then tested. However, the above method is not applicable to flexible circuit boards. The general method is to place the flexible board flat on a conveyor plate and move it, and then use a flying probe tester to test it. This method has the following problems. Since the soft board is lighter in texture, once the flying probe needle drives the soft board to move during the separation process after contact with the soft board, the position of the soft board changes, which will affect the precise alignment of the subsequent flying probe and the end of the soft board, thereby affecting the subsequent testing work. Therefore, a PCB flying probe test device and a test method thereof are proposed to address the above problems. Summary of the invention

[0004] The object of the present invention is to provide a PCB flying probe test device and a test method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a PCB flying probe test device and a test method thereof, comprising a base, a test arm and a placement seat; A test arm for flying probe testing of a flexible board is installed above the base, and a placement seat for placing the flexible board is provided below the test arm, and a base is installed outside the placement seat; A soft board surface treatment module is installed at the bottom of the test arm, and hollow frames are fixedly connected to both sides of the soft board surface treatment module, hydraulic rods are fixedly connected to the inside of the hollow frames, and the free ends of the hydraulic rods are fixedly connected to rectangular plates, and an air pipe is connected to the outside of the soft board surface treatment module, and an air pump device is externally connected to the other end of the air pipe; The bottoms of the soft board surface treatment module, the hollow frame and the rectangular board are all fixedly connected with evenly distributed downward pressing modules; The soft board surface treatment module includes a transverse tube, a hollow column and a hose, the top of the transverse tube is fixedly connected to the test arm, the bottom of the transverse tube is fixedly connected to the down-pressing module, one side of the transverse tube is connected to an air pipe, and the other side of the air pipe is connected to a hollow column arranged in a longitudinal direction, the outer side of the hollow column is connected to a hose, the other end of the hose is connected to a rotating tube, and a guide tube is arranged on the outer side of the other side of the rotating tube, and the outer side of the guide tube is fixedly connected to the transverse tube; The outer side of the rotating tube is rotatably connected with a rotating shaft, and both ends of the rotating shaft are fixedly connected to the transverse tube.

[0006] Furthermore, the hoses are made of rubber tubes, and the hoses are arranged in multiple groups.

[0007] Furthermore, a reciprocating mechanism is fixedly connected to the top of the transverse tube, a connecting plate is fixedly connected to the bottom of the reciprocating mechanism, and a sliding column is fixedly connected to the other end of the connecting plate. The outer side of the sliding column is slidably connected to the rotating tube through a waist-shaped groove.

[0008] Furthermore, the rotating tubes are arranged in multiple groups, and the sliding column passes through the multiple groups of rotating tubes.

[0009] Furthermore, the rectangular plate is arranged in a C shape.

[0010] Flying probe test is an effective way to detect the integrity of the circuit board. It connects with the end points on the circuit board through the contact and is used to measure the conduction between the two end points. When testing the traditional hard board, the board can be squeezed and fixed, and then tested. However, the above method is not applicable to the flexible circuit board. The general method is to place the flexible board flat on the conveyor plate and move it, and then test it with the flying probe test mechanism above. This method has the following problems. Since the soft board is light in texture, once the flying probe needle drives the soft board to move during the separation process after contacting the soft board, the position of the soft board changes at this time, which will affect the subsequent precise alignment of the flying probe and the end of the soft board, and then affect the subsequent testing work. When in use, the bottom of the test arm is connected with a transverse tube, and the transverse tube drives the hollow frame and the rectangular plate to move downward. At this time, the downward pressing module at the bottom of the transverse tube, the hollow frame and the rectangular plate moves downward, and the rubber pad at the bottom of the downward pressing module contacts with its soft board. At this time, it can fix the soft board, and under the action of the spring, it can ensure that the rubber pad has a certain buffering performance, ensure stable squeezing of the soft board, avoid the situation where the soft board follows the movement during the flying probe test, and ensure stable testing.

[0011] Furthermore, the reciprocating mechanism includes a fixed frame, a motor and a reciprocating screw, and the bottom of the fixed frame is fixedly connected to the transverse tube, the inside of the fixed frame is fixedly connected to the motor, the end of the main shaft of the motor is fixedly connected to the reciprocating screw, and the outer side of the reciprocating screw is slidably connected to a slider, the outer side of the slider is fixedly connected to the reciprocating rod, and the outer side of the reciprocating rod is fixedly connected to the connecting plate.

[0012] The motor drives the reciprocating screw to rotate. At this time, under the action of the slider, the reciprocating rod drives the connecting plate to move back and forth, and the connecting plate drives the sliding column to slide on the rotating tube. At this time, the rotating tube can be guaranteed to swing back and forth. At this time, a large area of ​​the soft board surface can be cleaned, ensuring the quality of subsequent tests.

[0013] Furthermore, the pressing module includes an installation frame, a sliding plate and a sliding rod. The interior of the installation frame is slidably connected to the sliding plate, the bottom of the sliding plate is fixedly connected to the sliding rod, the bottom of the sliding rod is fixedly connected to the extrusion block, and the bottom of the extrusion block is fixedly connected to the rubber pad.

[0014] Furthermore, the top of the sliding plate is fixedly connected with a spring, and the top of the spring is fixedly connected to the installation frame.

[0015] When the rubber pad contacts the PCB soft board, the rubber pad is applied to one side of the extrusion block, and then the extrusion block squeezes the sliding rod to move, the sliding rod drives the sliding plate on one side to move and squeeze the spring, which can ensure that the rubber pad has a certain buffering effect after contacting the PCB soft board, avoiding excessive squeezing of the PCB soft board and causing damage to it.

[0016] Further, the test method is as follows: Step 1: Substrate placement: First place the PCB soft board on the placement seat, and then move it downward through the test arm. At this time, the soft board surface treatment module can be moved downward under the action of the test arm, and the soft board surface treatment module, the hollow frame and the pressing module under the rectangular plate are in contact with and fixed to the PCB soft board; Step 2: Fixing the substrate: In actual operation, the PCB soft boards are of different sizes and shapes. At this time, the rectangular plate can be driven to move by starting the hydraulic rod inside the hollow frame. At this time, the position of the pressing module below can be controlled to fix the PCB soft boards of different sizes; Step 3: Substrate surface treatment: After the PCB soft board is fixed, the soft board surface treatment module is started. At this time, the external air blows the fixed PCB soft board through one side of the soft board surface treatment module to ensure that the surface of the PCB soft board is clean and tidy; Step 4: Substrate test: By starting the test arm, the flying probe can be driven to perform flying probe test on the connection lines on the surface of the PCB soft board.

[0017] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, a transverse tube is connected to the bottom of the test arm, and the transverse tube drives the hollow frame and the rectangular plate to move downward. At this time, the transverse tube, the hollow frame and the downward pressing module at the bottom of the rectangular plate move downward, and the rubber pad at the bottom of the downward pressing module contacts with the soft board, so that the purpose of adaptively fixing the soft board can be achieved, and under the action of the spring, the rubber pad can be guaranteed to have a certain buffering performance, so as to ensure stable squeezing of the soft board, avoid the situation that the soft board follows the movement when performing the flying probe test, and ensure stable testing; The hydraulic rod can drive the rectangular plate to move, which can ensure the movement of the pressing module, so that soft plates of different lengths can be fixed, which expands the scope of use to a certain extent. After the FPC is fixed, the external air pump is started. The air pump drives the air into the air pipe, and then disperses it into multiple hoses through the hollow column, and then enters the rotating tube and is discharged. At this time, the surface of the FPC can be cleaned to prevent the dust on the surface of the FPC from affecting the quality of the flying probe test. At the same time, the motor drives the reciprocating screw to rotate. At this time, under the action of the slider, the reciprocating rod drives the connecting plate to move back and forth, and the connecting plate drives the sliding column to slide on the rotating tube. At this time, the rotating tube can be guaranteed to swing back and forth. At this time, a large area of ​​the soft board surface can be cleaned, ensuring the quality of subsequent tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a PCB flying probe test device and its test method; Figure 2 A sectional view of a horizontal tube of a flying probe test device and a test method for a PCB board; Figure 3 A PCB flying probe test device and a test method thereof Figure 2 A schematic diagram of the structure at A; Figure 4 It is a structural schematic diagram of a PCB flying probe test device and a reciprocating mechanism of a test method thereof; Figure 5 The present invention is a schematic structural diagram of a PCB flying probe test device and a test method for a pressing module.

[0019] In the figure: 1. base; 2. test arm; 3. placement seat; 4. air pipe; 5. soft board surface treatment module; 501. horizontal tube; 502. hollow column; 503. hose; 504. rotating tube; 505. rotating shaft; 506. guide tube; 507. reciprocating mechanism; 5071. fixed frame; 5072. motor; 5073. reciprocating screw rod; 5074. slider; 5075. reciprocating rod; 508. connecting plate; 509. sliding column; 6. hollow frame; 7. rectangular plate; 8. pressing module; 801. mounting frame; 802. sliding plate; 803. sliding rod; 804. extrusion block; 805. rubber pad; 806. spring; 9. hydraulic rod. DETAILED DESCRIPTION

[0020] Example 1: Please refer to Figure 1 , Figure 2 and Figure 3 , the present invention provides a technical solution: A flying probe test device for a PCB board and a test method thereof, comprising a base 1, a test arm 2 and a placement seat 3; A test arm 2 for flying probe testing of a flexible circuit board is installed above the base 1, and a placement seat 3 for placing a flexible circuit board is provided below the test arm 2, and the base 1 is installed outside the placement seat 3; A soft board surface treatment module 5 is installed at the bottom of the test arm 2, and hollow frames 6 are fixedly connected to both sides of the soft board surface treatment module 5, hydraulic rods 9 are fixedly connected to the inside of the hollow frames 6, and a rectangular plate 7 is fixedly connected to the free end of the hydraulic rod 9, and an air pipe 4 is connected to the outside of the soft board surface treatment module 5, and the other end of the air pipe 4 is externally connected to an air pump device; The bottoms of the soft board surface treatment module 5, the hollow frame 6 and the rectangular plate 7 are all fixedly connected with evenly distributed pressing modules 8; The soft board surface treatment module 5 includes a transverse tube 501, a hollow column 502 and a hose 503. The top of the transverse tube 501 is fixedly connected to the test arm 2, and the bottom of the transverse tube 501 is fixedly connected to the pressing module 8. One side of the transverse tube 501 is connected to the air pipe 4, and the other side of the air pipe 4 is connected to the hollow column 502 arranged in a longitudinal direction. The outer side of the hollow column 502 is connected to the hose 503, and the other end of the hose 503 is connected to the rotating tube 504, and the outer side of the other side of the rotating tube 504 is provided with a guide tube 506, and the outer side of the guide tube 506 is fixedly connected to the transverse tube 501; The outer side of the rotating tube 504 is rotatably connected with a rotating shaft 505 , and both ends of the rotating shaft 505 are fixedly connected to the horizontal tube 501 .

[0021] The hoses 503 are made of rubber tubes, and the hoses 503 are arranged in multiple groups.

[0022] The top of the horizontal tube 501 is fixedly connected with a reciprocating mechanism 507, the bottom of the reciprocating mechanism 507 is fixedly connected with a connecting plate 508, and the other end of the connecting plate 508 is fixedly connected with a sliding column 509, and the outer side of the sliding column 509 is slidably connected with the rotating tube 504 through a waist-shaped groove.

[0023] The rotating tubes 504 are arranged in multiple groups, and the sliding posts 509 penetrate through the multiple groups of rotating tubes 504 .

[0024] The rectangular plate 7 is arranged in a C shape.

[0025] The test method is as follows: Step 1: Substrate placement: The PCB soft board is first placed on the placement seat 3, and then moved downward by the test arm 2. At this time, the soft board surface treatment module 5 can be moved downward under the action of the test arm 2, and the soft board surface treatment module 5, the hollow frame 6 and the pressing module 8 under the rectangular plate 7 are in contact with and fixed to the PCB soft board; Step 2: Fixing the substrate: In actual operation, the PCB soft boards are of different sizes and shapes. At this time, the rectangular plate 7 can be driven to move by starting the hydraulic rod 9 inside the hollow frame 6. At this time, the position of the pressing module 8 below can be controlled to fix the PCB soft boards of different sizes; Step 3: Surface treatment of substrate: After the PCB soft board is fixed, the soft board surface treatment module 5 is started, and external air blows the fixed PCB soft board through one side of the soft board surface treatment module 5 to ensure that the surface of the PCB soft board is clean and tidy; Step 4: Base material test: By starting the test arm 2, the flying probe can be driven to perform flying probe test on the connection lines on the surface of the PCB soft board.

[0026] Flying probe test is an effective way to detect the integrity of the circuit board. It connects the end points on the circuit board through the contact and is used to measure the conduction between the two end points. When testing the traditional hard board, the board can be squeezed and fixed, and then tested. However, the above method is not applicable to the flexible circuit board. The general method is to place the flexible board flat on the conveyor plate and move it, and then test it with the flying probe test mechanism above. This method has the following problems. Since the soft board is light in texture, once the flying probe needle drives the soft board to move during the separation process after contact with the soft board, the position of the soft board changes, which will affect The following flying probe and the precise alignment of the soft board end are affected, and the following test work is affected. When in use, the bottom of the test arm 2 is connected with a transverse tube 501, and the transverse tube 501 drives the hollow frame 6 and the rectangular plate 7 to move downward. At this time, the transverse tube 501, the hollow frame 6 and the pressing module 8 at the bottom of the rectangular plate 7 move downward, and the rubber pad 805 at the bottom of the pressing module 8 contacts with the soft board, which can fix the soft board. Under the action of the spring 806, the rubber pad 805 can be guaranteed to have a certain buffering performance, ensuring stable squeezing of the soft board, avoiding the situation that the soft board follows the movement during the flying probe test, and ensuring stable testing. In this embodiment, after the soft board is fixed, the external air pump is started. At this time, the air pump drives the air into the air pipe 4, and then disperses it into the multiple hoses 503 through the hollow column 502, and then enters the multiple rotating tubes 504 and is discharged. At this time, the surface of the soft board can be cleaned to prevent the dust on the surface of the soft board from affecting the quality of the flying probe test. The hose 503 can be bent, thereby ensuring that the rotating tube 504 performs a swinging action; The reciprocating mechanism 507 can drive the connecting plate 508 to move back and forth, and the connecting plate 508 drives the sliding column 509 to move. Since the sliding column 509 can drive the rotating tube 504 to swing under the action of the waist-shaped groove on one side of the rotating tube 504, the sliding column 509 penetrates multiple rotating tubes 504, which can ensure that the multiple rotating tubes 504 are driven to swing. At this time, the surface of the PCB soft board can be cleaned in a large area to ensure the quality of subsequent flying probe detection; The hydraulic rod 9 can drive the rectangular plate 7 to move, and at this time it can ensure that the pressing module 8 is driven to move, so that PCB soft boards of different lengths can be fixed, which expands the scope of use to a certain extent.

[0027] Example 2: This example is an improvement on Example 1. Figure 4Specifically, the reciprocating mechanism 507 includes a fixed frame 5071, a motor 5072 and a reciprocating screw 5073, and the bottom of the fixed frame 5071 is fixedly connected to the horizontal tube 501, the interior of the fixed frame 5071 is fixedly connected to the motor 5072, the main shaft end of the motor 5072 is fixedly connected to the reciprocating screw 5073, and the outer side of the reciprocating screw 5073 is slidably connected to a slider 5074, the outer side of the slider 5074 is fixedly connected to a reciprocating rod 5075, and the outer side of the reciprocating rod 5075 is fixedly connected to the connecting plate 508.

[0028] The motor 5072 drives the reciprocating screw rod 5073 to rotate. At this time, under the action of the slider 5074, the reciprocating rod 5075 drives the connecting plate 508 to move back and forth. The connecting plate 508 drives the sliding column 509 to slide on the rotating tube 504. At this time, the rotating tube 504 can be ensured to swing back and forth. At this time, a large area of ​​the soft board surface can be cleaned, ensuring the quality of subsequent tests; In this embodiment, the connecting plate 508 is bent, which can drive the sliding column 509 to move. At the same time, under the action of the connecting plate 508, the reciprocating rod 5075 can be ensured to move up and down stably to avoid its own rotation.

[0029] Example 3: This example is an improvement on Example 2. Figure 5 Specifically, the pressing module 8 includes a mounting frame 801, a sliding plate 802 and a sliding rod 803. The interior of the mounting frame 801 is slidably connected with the sliding plate 802. The bottom of the sliding plate 802 is fixedly connected with the sliding rod 803. The bottom of the sliding rod 803 is fixedly connected with an extrusion block 804. The bottom of the extrusion block 804 is fixedly connected with a rubber pad 805.

[0030] The top of the sliding plate 802 is fixedly connected with a spring 806 , and the top of the spring 806 is fixedly connected to the installation frame 801 .

[0031] When the rubber pad 805 contacts the PCB soft board, the rubber pad 805 is applied to one side of the extrusion block 805, and then the extrusion block 805 squeezes the sliding rod 803 to move, and the sliding rod 803 drives the sliding plate 802 on one side to move and squeeze the spring 806, which can ensure that after the rubber pad 805 contacts the PCB soft board, the purpose of adaptive fixation is achieved, and a certain buffering effect is achieved to avoid excessive squeezing of the PCB soft board and causing damage to it.

[0032] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A flying probe test device for a PCB board, comprising a base (1), a test arm (2) and a placement seat (3), characterized in that: A test arm (2) for flying probe testing of a flexible circuit board is installed above the base (1), and a placement seat (3) for placing a flexible circuit board is provided below the test arm (2), and the base (1) is installed outside the placement seat (3); A soft board surface treatment module (5) is installed at the bottom of the test arm (2), and hollow frames (6) are fixedly connected to both sides of the soft board surface treatment module (5), hydraulic rods (9) are fixedly connected to the inside of the hollow frames (6), and the free ends of the hydraulic rods (9) are fixedly connected to rectangular plates (7), the outside of the soft board surface treatment module (5) is connected to an air pipe (4), and the other end of the air pipe (4) is externally connected to an air pump device; The bottoms of the soft board surface treatment module (5), the hollow frame (6) and the rectangular plate (7) are all fixedly connected with evenly distributed downward pressing modules (8); The soft board surface treatment module (5) comprises a transverse tube (501), a hollow column (502) and a hose (503); the top of the transverse tube (501) is fixedly connected to the test arm (2); and the bottom of the transverse tube (501) is fixedly connected to the pressing module (8).

2. A flying probe test device for a PCB board according to claim 1, characterized in that: One side of the transverse tube (501) is connected to the air pipe (4), and the other side of the air pipe (4) is connected to a hollow column (502) arranged in a longitudinal direction, the outer side of the hollow column (502) is connected to a hose (503), the other end of each hose (503) is connected to a rotating tube (504), and a guide tube (506) is arranged on the outer side of the other side of the rotating tube (504), and the outer side of the guide tube (506) is fixedly connected to the transverse tube (501); The outer side of the rotating tube (504) is rotatably connected to a rotating shaft (505), and both ends of the rotating shaft (505) are fixedly connected to the transverse tube (501).

3. A flying probe test device for a PCB board according to claim 2, characterized in that: The hoses (503) are made of rubber tubes, and the hoses (503) are arranged in multiple groups.

4. A flying probe test device for a PCB board according to claim 2, characterized in that: The top of the transverse tube (501) is fixedly connected to a reciprocating mechanism (507), the bottom of the reciprocating mechanism (507) is fixedly connected to a connecting plate (508), and the other end of the connecting plate (508) is fixedly connected to a sliding column (509), and the outer side of the sliding column (509) is slidably connected to the rotating tube (504) via a waist-shaped groove.

5. A flying probe test device for a PCB board according to claim 2, characterized in that: The rotating tubes (504) are arranged in multiple groups, and the sliding posts (509) penetrate the multiple groups of rotating tubes (504).

6. A flying probe test device for a PCB board according to claim 4, characterized in that: The reciprocating mechanism (507) comprises a fixed frame (5071), a motor (5072) and a reciprocating screw (5073), wherein the bottom of the fixed frame (5071) is fixedly connected to the transverse tube (501), the interior of the fixed frame (5071) is fixedly connected to the motor (5072), the end of the main shaft of the motor (5072) is fixedly connected to the reciprocating screw (5073), the outer side of the reciprocating screw (5073) is slidably connected to a slider (5074), the outer side of the slider (5074) is fixedly connected to a reciprocating rod (5075), and the outer side of the reciprocating rod (5075) is fixedly connected to a connecting plate (508).

7. A flying probe test device for a PCB board according to claim 2, characterized in that: The rectangular plate (7) is arranged in a C shape.

8. A flying probe test device for a PCB board according to claim 1, characterized in that: The pressing module (8) comprises a mounting frame (801), a sliding plate (802) and a sliding rod (803); the interior of the mounting frame (801) is slidably connected to the sliding plate (802); the bottom of the sliding plate (802) is fixedly connected to the sliding rod (803); the bottom of the sliding rod (803) is fixedly connected to an extrusion block (804); and the bottom of the extrusion block (804) is fixedly connected to a rubber pad (805).

9. A flying probe test device for a PCB board according to claim 8, characterized in that: The top of the sliding plate (802) is fixedly connected to a spring (806), and the top of the spring (806) is fixedly connected to the installation frame (801).

10. A testing method for a flying probe test device for a PCB board according to any one of claims 1 to 9, characterized in that: The test method is as follows: Step 1: Placing the substrate: first placing the PCB soft board on the placement seat (3), and then moving it downward through the test arm (2), at which time the soft board surface treatment module (5) can be moved downward under the action of the test arm (2), and the soft board surface treatment module (5), the hollow frame (6) and the pressing module (8) below the rectangular plate (7) are in contact with and fixed to the PCB soft board; Step 2: Fixing the substrate: In actual operation, the PCB soft boards are of different sizes and shapes. At this time, the rectangular plate (7) can be driven to move by starting the hydraulic rod (9) inside the hollow frame (6). At this time, the position of the pressing module (8) below can be controlled to fix the PCB soft boards of different sizes. Step 3: substrate surface treatment: after the PCB soft board is fixed, the soft board surface treatment module (5) is started, and external air is blown through one side of the soft board surface treatment module (5) to the fixed PCB soft board, so as to ensure that the surface of the PCB soft board is clean and tidy; Step 4: Base material test: By starting the test arm (2), the flying probe can be driven to perform a flying probe test on the connection lines on the surface of the PCB soft board.

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