Test system for circuit board

Abstract

The utility model provides a test system for a circuit board, which comprises a base, a fixing mechanism and a pressure mechanism, the fixing mechanism is arranged above the base, the pressure mechanism is arranged above the fixing mechanism, one end of the pressure mechanism is fixedly connected with the top surface of the base, the fixing mechanism comprises a fixing plate, and a positioning plate is arranged above the fixing plate. A driving block is fixedly connected to one side of the positioning plate, a groove is formed in the side, facing the center of the positioning plate, of the driving block, a first threaded rod is arranged in the groove, threads opposite in thread direction are formed in the two ends of the first threaded rod, and the threads at the two ends of the first threaded rod are opposite in thread direction and can drive the two limiting rods to move in the opposite directions. In this way, the distance between the two limiting rods can be rapidly adjusted to adapt to circuit boards of different sizes or models, and accurate positioning of the circuit boards in the testing process can be guaranteed through the multiple pin holes formed in the positioning plate. It is ensured that the test probe can be accurately contacted with the test point on the circuit board, and the accuracy and reliability of the test are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a testing system for a circuit board. Background Art

[0002] A circuit board is a support for connecting electronic components and circuits together, used to realize functions such as layout design of complex circuits and electrical signal transmission in electrical appliances and electronic devices. A circuit board usually consists of multiple printed circuit boards, including one or more metal layers, plastic layers, insulating layers, and control layers. These layers are all perforated and plated with conductors for connection and conduction. The circuit board testing system is mainly used to measure the electrical values of the control board and detect the overall operating performance parameters of the main board, etc., to ensure the quality and reliability of the circuit board. It usually includes two major parts: in-circuit test (ICT) and functional test (FCT).

[0003] The circuit board testing system of the prior art consists of a fixing unit and a detecting unit. The detecting unit includes a base, and a short-circuit overcurrent monitoring module, a downloading module, a communication module, a power supply module, etc. are also arranged in the base. The circuit board testing device also includes probes corresponding to the short-circuit overcurrent monitoring module, probes corresponding to the downloading module, probes corresponding to the communication module, and probes corresponding to the power supply module. One end of the probe corresponding to the short-circuit overcurrent monitoring module passes through the probe fixing plate and is connected to the short-circuit overcurrent monitoring module. One end of the probe corresponding to the downloading module passes through the probe fixing plate and is connected to the downloading module. The communication module can be a CAN module, the communication interface can be a USB extender interface, and a USB cable can be inserted into the USB extender interface. The circuit board testing device is connected to the testing equipment through this USB cable. The testing equipment can be a computer, a personal computer, etc. Testing software is installed in the testing equipment, and the testing software is used to control the testing process and process the testing data. The fixing unit includes a fixing seat fixed on the top surface of the base, and a pressure plate is arranged above the fixing seat. The pressure plate is driven by a lifting rod to fix the circuit board. However, since the shape of the fixing plate of this structure is fixed, it can only be applicable to specific models of circuit boards and cannot adjust the testing system according to the characteristics of the circuit board. When different models or specifications of circuit boards need to be tested, the entire fixing unit may need to be replaced, increasing the operation complexity and cost.

[0004] Therefore, it is necessary to provide a new testing system for a circuit board to solve the above technical problems. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides a testing system for a circuit board.

[0006] The test system for a circuit board provided by the present utility model includes: a base, a fixing mechanism, and a pressure mechanism. A fixing mechanism is arranged above the base, a pressure mechanism is arranged above the fixing mechanism, and one end of the pressure mechanism is fixedly connected to the top surface of the base;

[0007] The fixing mechanism includes a fixing plate. A positioning plate is arranged above the fixing plate. A driving block is fixedly connected to one side of the positioning plate. A groove is formed on the side of the driving block facing the center of the positioning plate. A first threaded rod is arranged in the groove. Threads with opposite directions are formed at both ends of the first threaded rod. Two limiting rods are threadedly connected to both ends of the first threaded rod. A plurality of pinholes are formed on the positioning plate for testing circuit boards of different models.

[0008] Preferably, threads with opposite directions are formed at both ends of the first threaded rod. One end of the first threaded rod is movably arranged inside the limiting block. The other end of the threaded rod extends out of the limiting block and is connected to the output end of a first motor. The outer shell of the first motor is fixedly connected to the outer side wall of the limiting block.

[0009] Preferably, the pressure mechanism includes a support column. The bottom surface of the support column is fixedly connected to the top surface of the base. A top plate is fixedly connected to the top surface of the support column. An electric cylinder is fixedly connected to one side of the bottom surface of the top plate where the support column is not connected. A pressure member is fixedly connected to the bottom surface of the electric cylinder.

[0010] Preferably, the pressure member includes a pressure block. The top surface of the pressure block is fixedly connected to the bottom surface of the electric cylinder. A chute is formed on the bottom surface of the pressure block. A second threaded rod is arranged in the chute. Two pressure brackets are threadedly connected to the second threaded rod.

[0011] Preferably, threads with opposite directions are formed at both ends of the second threaded rod. One end of the second threaded rod is movably arranged inside the limiting block. The other end of the second threaded rod extends out of the pressure block and is connected to the output end of a second motor. The outer shell of the second motor is fixedly connected to the outer side wall of the pressure block.

[0012] Preferably, the pressure bracket includes a connecting plate. The connecting plate is threadedly connected to the second threaded rod. A connecting column is fixedly connected to the bottom surface of the connecting plate. A gravity block is fixedly connected to the bottom surface of the connecting column.

[0013] Compared with the related art, the test system for a circuit board provided by the present utility model has the following beneficial effects:

[0014] The present utility model provides a test system for a circuit board. When the first motor is started, the first motor drives the first threaded rod to rotate. The thread directions at both ends of the first threaded rod are opposite, which can drive two limit rods to move in opposite directions. In this way, the distance between the two limit rods can be quickly adjusted to adapt to circuit boards of different sizes or models. Once adjusted to the appropriate position, the circuit board can be firmly fixed on the positioning plate, providing a stable platform for subsequent testing. The multiple pinholes opened on the positioning plate can ensure the accurate positioning of the circuit board during the testing process. This helps to ensure that the test probes or test clips can accurately contact the test points on the circuit board, improving the accuracy and reliability of the testing. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the test system for a circuit board provided by the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the fixing mechanism provided by the present utility model;

[0017] Figure 3 is a partial schematic diagram of the structure of the pressure mechanism provided by the present utility model.

[0018] Reference numerals in the figures: 1, base; 2, fixing plate; 3, positioning plate; 4, driving block; 5, first threaded rod; 6, limit rod; 7, first motor; 8, support column; 9, top plate; 10, electric cylinder; 11, pressure block; 12, second threaded rod; 13, second motor; 14, connecting plate; 15, connecting column; 16, gravity block. Detailed Embodiment

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] Please refer to Figures 1 - 3 , wherein, Figure 1 is a schematic diagram of the overall structure of the test system for a circuit board provided by the present utility model; Figure 2 is a schematic diagram of the structure of the fixing mechanism provided by the present utility model; Figure 3 is a partial schematic diagram of the structure of the pressure mechanism provided by the present utility model.

[0021] In the specific implementation process, as Figures 1 - 3As shown in the figure, a test system for a circuit board includes a base 1, a fixing mechanism, and a pressure mechanism. A fixing mechanism is arranged above the base 1, and a pressure mechanism is arranged above the fixing mechanism. One end of the pressure mechanism is fixedly connected to the top surface of the base 1. The fixing mechanism includes a fixing plate 2. A test device is arranged below the fixing plate 2, and a positioning plate 3 is arranged above the fixing plate 2. A driving block 4 is fixedly connected to one side of the positioning plate 3. A groove is formed on the side of the driving block 4 facing the center of the positioning plate 3. A first threaded rod 5 is arranged in the groove. Threads with opposite directions are formed at both ends of the first threaded rod 5. The opposite thread directions at both ends of the first threaded rod 5 enable the two limit rods 6 to move synchronously in opposite directions to adapt to circuit boards of different sizes. Two limit rods 6 are threadedly connected to both ends of the first threaded rod 5. A plurality of pinholes are formed on the positioning plate 3 for testing circuit boards of different models. One end of the first threaded rod 5 is movably arranged inside the limit block, and the other end of the threaded rod extends out of the limit block and is connected to the output end of a first motor 7. The outer shell of the first motor 7 is fixedly connected to the outer side wall of the limit block. The pressure mechanism includes a support column 8. The bottom surface of the support column 8 is fixedly connected to the top surface of the base 1. The top surface of the support column 8 is fixedly connected to a top plate 9. An electric cylinder 10 is fixedly connected to the side of the bottom surface of the top plate 9 that is not connected to the support column 8. A pressure member is fixedly connected to the bottom surface of the electric cylinder 10. The pressure member includes a pressure block 11. The top surface of the pressure block 11 is fixedly connected to the bottom surface of the electric cylinder 10. A chute is formed on the bottom surface of the pressure block 11. A second threaded rod 12 is arranged in the chute. Two pressure brackets are threadedly connected to the second threaded rod 12. Threads with opposite directions are formed at both ends of the second threaded rod 12. One end of the second threaded rod 12 is movably arranged inside the limit block, and the other end of the second threaded rod 12 extends out of the pressure block 11 and is connected to the output end of a second motor 13. The outer shell of the second motor 13 is fixedly connected to the outer side wall of the pressure block 11. The pressure bracket includes a connecting plate 14. The connecting plate 14 is threadedly connected to the second threaded rod 12. A connecting column 15 is fixedly connected to the bottom surface of the connecting plate 14. A gravity block 16 is fixedly connected to the bottom surface of the connecting column 15. The gravity block 16, as part of the pressure bracket, can be added or reduced according to needs to adjust the pressure applied to the circuit board. This design enables the system to adapt to different test requirements and improves the flexibility and accuracy of testing.

[0022] The working principle provided by the present utility model is as follows: Start the first motor 7, the first motor 7 drives the first threaded rod 5 to rotate. The thread directions at both ends of the first threaded rod 5 are opposite, which can drive the two limit rods 6 to move in opposite directions, so as to quickly adjust the distance between the two limit rods 6 to adapt to circuit boards of different sizes or models. Start the second motor 13, the second motor 13 drives the second threaded rod 12 to rotate. The thread directions at both ends of the second threaded rod 12 are opposite, which can drive the two connecting plates 14 to move in opposite directions, so as to adjust the distance between the two gravity blocks 16 to adapt to circuit boards of different sizes or models. Place the circuit board above the fixed plate 2, the electric cylinder 10 drives the pressure block 11 to realize the limitation of the circuit board by the positioning plate 3. The fixed plate 2 is provided with needle holes for the probes to pass through. One end of the probe corresponding to the test device passes through the fixed plate 2 and is connected to the test device, and the other end of the probe corresponding to the test device is used to connect the circuit board to be tested.

[0023] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated herein.

[0024] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A test system for a circuit board, characterized in that, Comprising: A base (1), a fixing mechanism, and a pressing mechanism. A fixing mechanism is disposed above the base (1), and a pressing mechanism is disposed above the fixing mechanism. One end of the pressing mechanism is fixedly connected to the top surface of the base (1). The fixing mechanism includes a fixing plate (2). A positioning plate (3) is disposed above the fixing plate (2). A driving block (4) is fixedly connected to one side of the positioning plate (3). A groove is formed on one side of the driving block (4) facing the center of the positioning plate (3). A first threaded rod (5) is disposed in the groove. Threads with opposite directions are formed at both ends of the first threaded rod (5). Two limiting rods (6) are threadedly connected to both ends of the first threaded rod (5). A plurality of pinholes are formed on the positioning plate (3) for testing circuit boards of different models.

2. The test system for a circuit board according to claim 1, characterized in that One end of the first threaded rod (5) is movably disposed inside the limiting block, and the other end of the threaded rod extends out of the limiting block and is connected to the output end of a first motor (7). The outer shell of the first motor (7) is fixedly connected to the outer side wall of the limiting block.

3. The test system for a circuit board according to claim 2, characterized in that, The pressing mechanism includes a support column (8). The bottom surface of the support column (8) is fixedly connected to the top surface of the base (1). A top plate (9) is fixedly connected to the top surface of the support column (8). An electric cylinder (10) is fixedly connected to one side of the bottom surface of the top plate (9) where it is not connected to the support column (8). A pressing member is fixedly connected to the bottom surface of the electric cylinder (10).

4. The test system for a circuit board according to claim 3, wherein, The pressing member includes a pressing block (11). The top surface of the pressing block (11) is fixedly connected to the bottom surface of the electric cylinder (10). A chute is formed on the bottom surface of the pressing block (11). A second threaded rod (12) is disposed in the chute. Two pressing frames are threadedly connected to the second threaded rod (12).

5. The test system for a circuit board according to claim 4, wherein Threads with opposite directions are formed at both ends of the second threaded rod (12). One end of the second threaded rod (12) is movably disposed inside the limiting block, and the other end of the second threaded rod (12) extends out of the pressing block (11) and is connected to the output end of a second motor (13). The outer shell of the second motor (13) is fixedly connected to the outer side wall of the pressing block (11).

6. The test system for a circuit board according to claim 5, characterized in that The pressing frame includes a connecting plate (14). The connecting plate (14) is threadedly connected to the second threaded rod (12). A connecting column (15) is fixedly connected to the bottom surface of the connecting plate (14). A gravity block (16) is fixedly connected to the bottom surface of the connecting column (15).

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