Circuit board detection device

Abstract

The invention discloses a circuit board detection device, which relates to the technical field of detection, and is characterized in that a plurality of guide grooves are formed in the peripheral side walls of a detection table, and the detection table covers the top of a box body; the clamping mechanism comprises four clamping assemblies distributed in the circumferential direction, each clamping assembly comprises a moving plate and a clamping plate which are located at the top of the detection table, the moving plate is connected with a support, the support is in sliding fit with the corresponding guide groove, a threaded rod penetrates through the moving plate in a threaded mode, and the inner end of the threaded rod is rotationally connected with the clamping plate; the regulation and control assembly is arranged in the box body and used for gathering the four supports together. The lifting mechanism is used for adjusting the height of the probe mounting mechanism; the probe installation mechanism comprises a rectangular frame and a probe plate, the probe plate is limited in the rectangular frame through four limiting pieces, and when the limiting pieces rotate to receding grooves in the inner wall of the rectangular frame, the probe plate is disassembled. According to the invention, the clamping mechanism can clamp and fix circuit boards of different sizes, and a probe plate in the probe mounting mechanism can be replaced, so that the circuit boards of different types can be detected.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a circuit board detection device. Background Art

[0002] Probes are an indispensable tool in circuit board inspection. Probes are usually made of stainless steel, gold or platinum because these materials have high conductivity and high corrosion resistance. When the probe is stably connected to the circuit board, it can detect faults and defects in the circuit by transmitting a certain current and frequency, thus helping engineers quickly find the problem and repair it, ensuring the quality and reliability of the product.

[0003] At present, although the detection device designed specifically for a single type of circuit board has a high test efficiency, the size of the groove used to place the circuit board on its detection table is fixed. Since there are many types of circuit boards produced with different sizes, the detection points and quantity on each circuit board are also different. Therefore, these special detection devices have poor versatility and cannot meet the detection needs of various circuit boards. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a circuit board detection device, which is suitable for circuit boards of different sizes and types, and improves the versatility of the device.

[0005] In order to achieve the purpose of the present invention, the following scheme is proposed: A circuit board detection device comprises a detection platform, a clamping mechanism, a regulating component, a lifting mechanism, and a probe installation mechanism.

[0006] Several guide grooves are arranged on the side walls around the testing platform, and the testing platform covers the top of the box; The clamping mechanism includes four circumferentially distributed clamping assemblies, the clamping assemblies include a moving plate and a clamping plate both located on the top of the test table, the moving plate is connected with a bracket, the bracket is slidably matched with the corresponding guide groove, the moving plate is threaded with a screw rod, and the inner end of the screw rod is rotatably connected to the clamping plate; The regulating component is arranged in the box and connected to each clamping component, and is used to drive each bracket to gather toward the center of the testing platform; The lifting mechanism is connected to the box body through a support plate and is used to adjust the height of the probe installation mechanism; The probe installation mechanism is located above the test bench, and includes a rectangular frame and a probe plate. A circle of steps is provided on the inner wall of the rectangular frame. The probe plate is supported on the steps, and multiple probes are installed at the bottom. Through holes are provided at four right angles of the probe plate, and corresponding positions of the rectangular frame are provided with limit members. The limit members include a paddle plate, a column and a pressure plate slidably arranged on the outer periphery of the column. One end of the paddle plate is rotatably connected to the top of the side wall of the rectangular frame, and the bottom of the other end is connected to the column. A first spring is provided on the outer periphery of the column, and the two ends of the first spring are respectively connected to the paddle plate and the pressure plate. The bottom surface of the pressure plate is close to the probe plate, and the column corresponds to the through hole. The paddle plate has two rotation gears. When the limit member rotates to the avoidance groove on the inner wall of the rectangular frame, it is used to disassemble the probe plate, and the bottom surface of the avoidance groove is flush with the bottom surface of the pressure plate.

[0007] The beneficial effects of the present invention are: 1. The clamping mechanism of the present invention can clamp and fix circuit boards of different sizes, and the probe plate in the probe installation mechanism can be replaced so as to detect different types of circuit boards.

[0008] 2. For circuit boards of different sizes, the position of the clamp can be adjusted by turning the knob of the screw, which is easy to operate.

[0009] 3. The limiter has an ingenious structure and is used to limit the probe board within the rectangular frame. When the probe board contacts the circuit board, the limiter can also play a buffering role. The limiter is easy to operate. You only need to rotate the four limiters into the avoidance groove to release the restriction on the probe board, making it convenient to take out the probe board for replacement.

[0010] 4. After the circuit board inspection is completed, the regulating component acts as a power source. During the process of opening the four clamps, the regulating component can also move the base plate upward, thereby lifting the circuit board from the inspection table so as to remove the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Shows a structural diagram of the detection device; Figure 2 Shows a probe installation mechanism structure diagram; Figure 3 for Figure 2 A partial enlarged view of the middle part; Figure 4 The bottom structure diagram of the probe mounting mechanism is shown; Figure 5 A top view is shown when all four stoppers are rotated to the avoidance groove; Figure 6 The internal structure of the rectangular frame after the probe card is taken out is shown; Figure 7 A schematic diagram of the lifting mechanism and the clamping mechanism inside the box is shown; Figure 8 A structural diagram of a detection device having a circuit board height adjustment component is shown; Fig. 9 A top view showing the receiving slot not penetrating the detection platform; Fig.10 A schematic diagram of a circuit board height adjustment component inside a box is shown; Fig.11 A top view of the receiving slot penetrating the detection station is shown; Fig.12 Another schematic diagram of a circuit board height adjustment component inside a box is shown; Markings in the figure: detection table-1, guide groove-11, box body-12, vertical plate-13, accommodating groove-14, round hole-15, clamping mechanism-2, sphere-21, movable plate-22, bracket-221, clamping plate-23, horizontal rod-24, second spring-25, screw-26, regulating component-3, quadrangular platform-31, lifting rod-32, support plate-33, lifting mechanism-4, support plate-41, probe installation mechanism-5, rectangular frame-51, step-511, avoidance groove-512, limit piece-52, dial plate-521, column-522, pressure plate-523, first spring-524, probe plate-53, through hole-531, handle hole-532, fourth spring-54, buffer plate-55, avoidance hole-552, base plate-61, vertical rod-62, third spring-63. DETAILED DESCRIPTION

[0012] like Figure 1 , Figure 7 As shown, this embodiment provides a circuit board detection device, including a detection platform 1, a clamping mechanism 2, a regulating component 3, a lifting mechanism 4, and a probe installation mechanism 5.

[0013] Specifically, two guide grooves 11 are provided on the side walls around the testing platform 1. The testing platform 1 covers the top of the box 12. The center of the testing platform 1 is used to place the circuit board to be tested.

[0014] Specifically, Figure 1 , Figure 7 As shown, the clamping mechanism 2 includes four circumferentially distributed clamping components, each clamping component includes a movable plate 22 and a clamping plate 23, both of which are located on the top of the test table 1, and the movable plate 22 is located on the outside of the clamping plate 23, and the two are parallel to each other. The movable plate 22 is connected to a U-shaped bracket 221, and the two branches of the bracket 221 are respectively slidably matched with the corresponding guide grooves 11. The movable plate 22 is threaded with a screw 26, and the inner end of the screw 26 is rotatably connected to the clamping plate 23. A knob is provided at the outer end of the screw 26. When the knob is turned, the position of the clamping plate 23 can be adjusted, and then the distance between the movable plate 22 and the clamping plate 23 can be adjusted to be suitable for circuit boards of different sizes.

[0015] Specifically, the regulating component 3 is disposed in the box 12 and connected to each clamping component to drive each bracket 221 to gather toward the center of the detection platform 1, and then gather the four clamping plates 23. The specific implementation method is as follows: Figure 1 , Figure 7 As shown, four vertical plates 13 are arranged in the box body 12, and the regulating component 3 is arranged between the four vertical plates 13. The regulating component 3 includes a lifting rod 32 and a four-sided platform 31 arranged on the top thereof. The power source of the lifting rod 32 can be driven by a cylinder or an oil cylinder to adjust the height of the four-sided platform 31. Each clamping component also includes a sphere 21 and a horizontal rod 24. The horizontal rod 24 slides through the corresponding vertical plate 13. The two ends of the horizontal rod 24 are respectively connected to the sphere 21 and the corresponding bracket 221. A second spring 25 is arranged between the vertical plate 13 and the bracket 221. The second spring 25 is arranged on the outer periphery of the horizontal rod 24. The sphere 21 is close to one side of the four-sided platform 31. Figure 7 In the state, the quadrangular platform 31 is at the highest point, the four clamping components are in the open state, and the second spring 25 is in the compressed state.

[0016] The working principle of the clamping mechanism 2 is as follows: the circuit board to be tested is placed at the center of the test platform 1; the lifting rod 32 moves the four-sided platform 31 downward, and after the sphere 21 loses the squeezing force of the four-sided platform 31, the sphere 21 will move toward the four-sided platform 31 under the elastic force of the second spring 25, which is a gathering action. Because the sphere 21, the horizontal rod 24, the bracket 221, the moving plate 22, the clamping plate 23 and the screw 26 are equivalent to a whole, when the four-sided platform 31 moves downward, the whole will gather toward the circuit board until the clamping plate 23 just clamps the circuit board. In this process, the clamping plate 23 also plays a role in fine-tuning the posture of the circuit board. When it is necessary to clamp circuit boards of different sizes, it is only necessary to rotate the screw 26 corresponding to the clamping plate 23 separately.

[0017] Specifically, Figure 1 As shown, the lifting mechanism 4 is connected to the box 12 through a support plate 41. The lifting mechanism 4 is used to adjust the height of the probe mounting mechanism 5. There are many ways to implement the lifting mechanism 4, such as by a motor driving a screw rod. This is a conventional setting and its structure and principle will not be elaborated in detail.

[0018] Specifically, Figure 1-Figure 6 As shown, the probe installation mechanism 5 is located above the test platform 1 and includes a rectangular frame 51 and a probe plate 53 ( Figure 2 ), the inner wall of the rectangular frame 51 is provided with a circle of steps 511 ( Figure 6 ), the probe plate 53 is supported on the step 511, and a plurality of probes ( Figure 4 ), through holes 531 are provided at four right angles of the probe plate 53 ( Figure 5 ), the corresponding positions of the rectangular frame 51 are provided with stoppers 52 ( Figure 1), the limiting member 52 includes a dial plate 521, a column 522 and a pressure plate 523 slidably arranged on the periphery of the column 522, one end of the dial plate 521 is rotatably connected to the top of the side wall of the rectangular frame 51, and the bottom of the other end of the dial plate 521 is connected to the column 522. A first spring 524 is arranged on the periphery of the column 522, and the two ends of the first spring 524 are respectively connected to the dial plate 521 and the pressure plate 523 ( Figure 3 ), the bottom surface of the pressing plate 523 is close to the probe plate 53, and the column 522 corresponds to the through hole 531, and the dial plate 521 has two rotation gears. When the limiter 52 rotates to the avoidance groove 512 on the inner wall of the rectangular frame 51 ( Figure 5 ), used to disassemble the probe plate 53 and replace other types of probe plates 53, which is suitable for detecting different types of circuit boards. In order to facilitate the removal or placement of the probe plate 53, such as Figure 2 As shown, the probe card 53 is provided with two handle holes 532 .

[0019] Three points are explained here: ① Regarding the two rotation gears of the dial plate 521, the first gear is to ensure that the column 522 is exactly corresponding to the through hole 531, and the second gear is to ensure that the limit member 52 is rotated into the avoidance groove 512; ② Regardless of whether the dial plate 521 is in the first gear or the second gear, the first spring 524 is in a compressed state; ③ The implementation method of the dial plate 521 having two rotation gears belongs to the prior art. For example, electrical equipment such as microwave ovens and electric fans have this function, and the structure and principle of the gears will not be elaborated in detail here.

[0020] Working principle of the probe installation mechanism 5: select the corresponding probe board 53 according to the type of circuit board to be tested; place the probe board 53 in the rectangular frame 51, and support the probe board 53 on the step 511, at this time, the top surface of the probe board 53 and the bottom surface of the pressure plate 523 are flush with the bottom surface of the avoidance groove 512, so that the limiter 52 can be smoothly rotated out of the avoidance groove 512; the staff rotates the four limiters 52 in turn, so that the column 522 of each limiter 52 is facing the through hole 531 of the probe board 53, and the installation of the probe board 53 is completed; use the lifting mechanism 4 to move the probe installation mechanism 5 downward, the probe at the bottom of the probe board 53 first contacts the circuit board, and then the probe generates an upward force on the probe board 53, and the first spring 524 always has a downward force on the probe board 53, so the first spring 524 can play a buffering role in the process of the probe contacting the circuit board, preventing the probe pressure from being too large to damage the circuit board, and ensuring that the probe stably contacts the circuit board.

[0021] In the solution of the probe installation mechanism 5, the probe plate 53 can be buffered by the first spring 524 when it contacts the circuit board. However, when the circuit board detection is completed and the probe installation mechanism 5 moves up, the probe plate 53 will fall onto the step 511. This process lacks buffering. In order to solve this problem, Figure 1 , Figure 5, Figure 6 As shown, the preferred probe mounting mechanism 5 also includes a buffer plate 55, a through groove is provided in the central area of ​​the buffer plate 55, the bottom of the buffer plate 55 is connected to the step 511 through a plurality of fourth springs 54, the probe plate 53 is supported on the buffer plate 55, and avoidance holes 552 are provided at four right angles of the buffer plate 55 corresponding to the through holes 531 for avoiding the columns 522.

[0022] The preferred working principle of the probe installation mechanism 5 is as follows: according to the type of circuit board to be tested, the corresponding probe board 53 is selected; the probe board 53 is placed in the rectangular frame 51, and the probe board 53 is supported on the buffer plate 55. The staff can press down the probe board 53 with a little force to make the top surface of the probe board 53 and the bottom surface of the pressure plate 523 flush with the bottom surface of the avoidance groove 512, so that the limit member 52 can be smoothly rotated out of the avoidance groove 512; the staff rotates the four limit members 52 in turn so that the column 522 of each limit member 52 is facing the through hole 531 of the probe board 53 to complete the installation of the probe board 53; the lifting mechanism 4 is used to move the probe installation mechanism 5 downward so that the probe contacts the circuit board; after the detection is completed, the lifting mechanism 4 is used to move the probe installation mechanism 5 upward, and the buffer plate 55 and multiple fourth springs 54 have a buffering effect on the probe board 53.

[0023] The above solution can clamp and fix circuit boards of different sizes, and can also detect different types of circuit boards. However, after the detection is completed, the bottom surface of the circuit board is close to the detection table 1, so it is inconvenient to take out the circuit board. This embodiment adopts two methods to solve this problem: The first type: Figure 8-Figure 10 As shown, a receiving groove 14 is provided on the top of the testing platform 1, and four circular holes 15 are provided below the receiving groove 14. The device also includes a circuit board height adjustment component, which includes a base plate 61 and four vertical rods 62 provided at the bottom of the base plate 61. Four support plates 33 are distributed circumferentially at the bottom of the quadrangular platform 31. The long axis of the support plate 33 points to the central axis of the quadrangular platform 31. The support plate 33 extends outward to the bottom of the corresponding circular hole 15. The base plate 61 is located above the receiving groove 14, and the two are of the same size. The vertical rod 62 slides downward to pass through the corresponding circular hole 15 and the support plate 33. A third spring 63 is provided between the support plate 33 and the testing platform 1. The third spring 63 is located on the outer periphery of the vertical rod 62. The top surface of the base plate 61 is used to place the circuit board to be tested.

[0024] When using, Figure 8 , Fig.10When the clamping plate 23 is in contact with the circuit board, the lifting rod 32 continues to move the quadrangular platform 31 downward, and the substrate 61 will not move downward accordingly. The support plate 33 moves downward along the vertical rod 62 until the clamping plate 23 just clamps the circuit board and stops. After the circuit board inspection is completed, the lifting rod 32 moves the quadrangular platform 31 upward, first prompting the clamping plate 23 to release the circuit board, and then the substrate 61 moves upward to lift the circuit board from the inspection table 1 so as to remove the circuit board.

[0025] Another: such as Figure 8 , Fig.11 , Fig.12 As shown, a receiving groove 14 is provided at the center of the testing platform 1, which runs through the testing platform 1. The device also includes a circuit board height adjustment component, which includes a base plate 61 and four vertical rods 62 provided at the bottom of the base plate 61. Four support plates 33 are distributed circumferentially at the bottom of the quadrangular platform 31. The base plate 61 is located above the receiving groove 14, and the two are of the same size. The bottom of the vertical rod 62 is fixedly connected to the corresponding support plate 33, and the top surface of the base plate 61 is used to place the circuit board to be tested.

[0026] When in use, the circuit board to be tested is placed on the top surface of the substrate 61; the lifting rod 32 moves the quadrangular platform 31 downward, and the substrate 61 moves downward with the quadrangular platform 31. When the substrate 61 falls to the receiving groove 14, the circuit board stays on the top surface of the testing table 1. At this time, the clamping plate 23 has not yet contacted the circuit board. The lifting rod 32 continues to move the quadrangular platform 31 downward, and the substrate 61 passes through the receiving groove 14 downward until the clamping plate 23 just clamps the circuit board and stops; after the circuit board inspection is completed, the lifting rod 32 moves the quadrangular platform 31 upward, first prompting the clamping plate 23 to release the circuit board, and then the substrate 61 moves upward to lift the circuit board from the testing table 1 so as to remove the circuit board.

[0027] The above embodiments are only used to illustrate the technical ideas and features of the present invention, and are not intended to be the only or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent substitutions made to the present invention without departing from the scope of the present invention all fall within the scope of protection of the present invention.

Claims

1. A circuit board detection device, characterized in that: include: The detection platform (1) has a plurality of guide grooves (11) on its four side walls, and the detection platform (1) covers the top of the box body (12); The clamping mechanism (2) comprises four circumferentially distributed clamping components, the clamping components comprising a movable plate (22) and a clamping plate (23) both located on the top of the detection platform (1), the movable plate (22) being connected to a bracket (221), the bracket (221) being slidably matched with the corresponding guide groove (11), the movable plate (22) being threadedly penetrated by a screw rod (26), the inner end of the screw rod (26) being rotatably connected to the clamping plate (23); A regulating component (3) is disposed in the box (12) and connected to each clamping component, and is used to drive each bracket (221) to gather toward the center of the detection platform (1); A lifting mechanism (4) connected to the box (12) via a support plate (41) and used to adjust the height of the probe mounting mechanism (5); The probe installation mechanism (5) is located above the test platform (1), and comprises a rectangular frame (51) and a probe plate (53). The inner wall of the rectangular frame (51) is provided with a circle of steps (511). The probe plate (53) is supported on the steps (511) and a plurality of probes are installed at the bottom thereof. Through holes (531) are provided at four right angles of the probe plate (53). The corresponding positions of the rectangular frame (51) are provided with stoppers (52). The stoppers (52) comprise a dial plate (521), a column (522) and a pressure plate (523) slidably arranged on the outer periphery of the column (522). One end of the shift plate (521) is rotatably connected to the top of the side wall of the rectangular frame (51), and the bottom of the other end is connected to the column (522). A first spring (524) is provided on the periphery of the column (522). The bottom surface of the pressure plate (523) is in close contact with the probe plate (53), and the column (522) corresponds to the through hole (531). The shift plate (521) has two rotation gears. When the limit member (52) is rotated to the avoidance groove (512) on the inner wall of the rectangular frame (51), it is used to disassemble the probe plate (53). The bottom surface of the avoidance groove (512) is flush with the bottom surface of the pressure plate (523).

2. The circuit board detection device according to claim 1, characterized in that: Four vertical plates (13) are arranged in the box body (12). The regulating assembly (3) is arranged between the four vertical plates (13). The regulating assembly (3) comprises a lifting rod (32) and a four-sided platform (31) arranged on the top thereof. The lifting rod (32) is used to adjust the height of the four-sided platform (31). The clamping assembly also comprises a sphere (21) and a horizontal rod (24). The horizontal rod (24) slides through the corresponding vertical plates (13). The two ends of the horizontal rod (24) are respectively connected to the sphere (21) and the bracket (221). A second spring (25) is arranged between the vertical plates (13) and the bracket (221). The second spring (25) is arranged on the outer periphery of the horizontal rod (24). The sphere (21) is closely attached to one side of the four-sided platform (31).

3. The circuit board detection device according to claim 2, characterized in that: A receiving groove (14) is provided on the top of the testing platform (1), and four circular holes (15) are provided below the receiving groove (14). The device also includes a circuit board height adjustment component, which includes a base plate (61) and four vertical rods (62) provided at the bottom of the base plate (61). Four support plates (33) are distributed circumferentially at the bottom of the quadrangular platform (31), and the support plates (33) extend outward to below the corresponding circular holes (15). The base plate (61) is located above the receiving groove (14), and the two have the same size. The vertical rods (62) penetrate downwardly through the corresponding circular holes (15) and the support plates (33). A third spring (63) is provided between the support plates (33) and the testing platform (1), and the third spring (63) is located on the outer periphery of the vertical rods (62). The top surface of the base plate (61) is used for placing the circuit board to be tested.

4. The circuit board detection device according to claim 2, characterized in that: A receiving groove (14) is provided at the center of the testing platform (1) and runs through the testing platform. The device also includes a circuit board height adjustment component, which includes a base plate (61) and four vertical rods (62) provided at the bottom of the base plate (61). Four support plates (33) are distributed circumferentially at the bottom of the quadrangular platform (31). The base plate (61) is located above the receiving groove (14) and the two have the same size. The bottom of the vertical rod (62) is fixedly connected to the corresponding support plate (33). The top surface of the base plate (61) is used to place the circuit board to be tested.

5. The circuit board detection device according to claim 1, characterized in that: The probe mounting mechanism (5) further comprises a buffer plate (55), a through groove being provided in a central region of the buffer plate (55), the bottom of the buffer plate (55) being connected to the step (511) via a plurality of fourth springs (54), the probe plate (53) being supported on the buffer plate (55), and avoidance holes (552) being provided at four right angles of the buffer plate (55) corresponding to the through holes (531) for avoiding the columns (522).

6. The circuit board detection device according to claim 1, characterized in that: The probe plate (53) is provided with two handle holes (532).

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