A circuit board detection device

Abstract

The present invention discloses a circuit board detection device, which relates to the technical field of detection and includes: A plurality of guiding grooves are provided on the side walls around the detection table, and the detection table covers the top of the box body; The clamping mechanism includes four circumferentially distributed clamping components. Each clamping component includes a moving plate and a clamping plate both located on the top of the detection table. The moving plate is connected with a bracket, and the bracket is slidably matched with the corresponding guiding groove. The moving plate is threadedly penetrated by a screw rod, and the inner end of the screw rod is rotatably connected to the clamping plate; The regulation component is arranged in the box body and is used to gather the four brackets; The lifting mechanism is used to adjust the height of the probe mounting mechanism; The probe mounting mechanism includes a rectangular frame and a probe board, and the probe board is limited in the rectangular frame by four limiting members. When the limiting members rotate to the avoidance grooves on the inner wall of the rectangular frame, it is used to disassemble the probe board. The clamping mechanism of the present invention can clamp and fix circuit boards of different sizes, and the probe board in the probe mounting mechanism can be replaced so as to detect different types of circuit boards.

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

[0003] Currently, although the detection devices designed specifically for a single type of circuit board have high test efficiency, the size of the groove on the detection table for placing the circuit board is fixed. Since there are many types of circuit boards produced with different sizes, and the detection points and quantities on each circuit board are also different, the versatility of these dedicated detection devices is poor and they cannot meet the detection requirements of multiple circuit boards. Summary of the Invention

[0004] To solve the deficiencies of the prior art, the present invention provides a circuit board detection device that is applicable to circuit boards of different sizes and types, improving the versatility of the device.

[0005] To achieve the object of the present invention, the following scheme is proposed:

[0006] A circuit board detection device includes a detection table, a clamping mechanism, a regulation component, a lifting mechanism, and a probe mounting mechanism.

[0007] A plurality of guiding grooves are provided on the side walls around the detection table, and the detection table covers the top of the box body;

[0008] The clamping mechanism includes four circumferentially distributed clamping components. Each clamping component includes a moving plate and a clamping plate both located on the top of the detection table. The moving plate is connected with a bracket, and the bracket is slidably matched with the corresponding guiding groove. A screw rod penetrates through the moving plate in a threaded manner, and the inner end of the screw rod is rotatably connected to the clamping plate;

[0009] The regulation component is arranged in the box body and is connected to each clamping component for driving each bracket to gather towards the center of the detection table;

[0010] The lifting mechanism is connected to the box body through a support plate for adjusting the height of the probe mounting mechanism;

[0011] The probe mounting mechanism is located above the inspection table and includes a rectangular frame and a probe board. There is a circle of steps on the inner wall of the rectangular frame, and the probe board is supported on the steps. Multiple probes are installed at the bottom of the probe board. Through holes are provided at the four right angles of the probe board, and limit members are provided at corresponding positions of the rectangular frame. The limit member includes a dial plate, a column, and a pressing plate slidably disposed on the outer periphery of the column. One end of the dial 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 dial plate and the pressing plate. The bottom surface of the pressing plate is in close contact with the probe board, and the column corresponds to the through hole. The dial plate has two rotation positions. When the limit member rotates to the avoidance groove on the inner wall of the rectangular frame, it is used to disassemble the probe board, and the bottom surface of the avoidance groove is flush with the bottom surface of the pressing plate.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The clamping mechanism of the present invention can clamp and fix circuit boards of different sizes, and the probe board in the probe mounting mechanism can be replaced to detect different types of circuit boards.

[0014] 2. For circuit boards of different sizes, the position of the clamping plate can be adjusted by turning the knob of the screw rod, which is convenient to operate.

[0015] 3. The structure of the limit member is ingenious and is used to limit the probe board in the rectangular frame. When the probe board contacts the circuit board, the limit member can also play a buffering role; the operation of the limit member is convenient. Just rotate the four limit members into the avoidance groove to release the restriction on the probe board and facilitate taking out the probe board for replacement.

[0016] 4. After the circuit board is detected, when the control component, as a power source, opens the four clamping plates, the control component can also move the substrate upward to lift the circuit board from the inspection table for easy removal of the circuit board. Description of the Drawings

[0017] Figure 1 Shows the structure diagram of the detection device;

[0018] Figure 2 Shows the structure diagram of the probe mounting mechanism;

[0019] Figure 3 Is Figure 2 The partial enlarged view at A in ;

[0020] Figure 4 Shows the bottom structure diagram of the probe mounting mechanism;

[0021] Figure 5 Shows the top view when the four limit members are all rotated into the avoidance groove;

[0022] Figure 6 Shows the internal structure diagram of the rectangular frame after the probe board is taken out;

[0023] Figure 7 Shows a schematic diagram of the lifting mechanism and the clamping mechanism inside the box body;

[0024] Figure 8 Shows the structural diagram of the detection device with a circuit board height adjustment component;

[0025] Figure 9 Shows a top view of the receiving groove not penetrating the detection table;

[0026] Figure 10 Shows a schematic diagram of one of the circuit board height adjustment components inside the box body;

[0027] Figure 11 Shows a top view of the receiving groove penetrating the detection table;

[0028] Figure 12 Shows a schematic diagram of another circuit board height adjustment component inside the box body;

[0029] Markings in the figure: detection table - 1, guide groove - 11, box body - 12, vertical plate - 13, receiving groove - 14, round hole - 15, clamping mechanism - 2, sphere - 21, moving plate - 22, bracket - 221, clamping plate - 23, horizontal rod - 24, second spring - 25, screw - 26, regulation component - 3, frustum - 31, lifting rod - 32, support plate - 33, lifting mechanism - 4, support plate - 41, probe mounting mechanism - 5, rectangular frame - 51, step - 511, avoidance groove - 512, limiting member - 52, dial plate - 521, column - 522, pressing plate - 523, first spring - 524, probe plate - 53, through hole - 531, handle hole - 532, fourth spring - 54, buffer plate - 55, avoidance hole - 552, substrate - 61, vertical rod - 62, third spring - 63. Detailed implementation manners

[0030] As Figure 1 、 Figure 7 shown, this embodiment provides a circuit board detection device, including a detection table 1, a clamping mechanism 2, a regulation component 3, a lifting mechanism 4, and a probe mounting mechanism 5.

[0031] Specifically, two guide grooves 11 are provided on the side walls around the detection table 1. The detection table 1 covers the top of the box body 12, and the center of the detection table 1 is used to place the circuit board to be tested.

[0032] Specifically, as Figure 1 、 Figure 7As shown in the figure, the clamping mechanism 2 includes four circumferentially distributed clamping components. Each clamping component includes a moving plate 22 and a clamping plate 23, both of which are located on the top of the detection table 1. The moving plate 22 is located outside the clamping plate 23, and the two are parallel to each other. The moving plate 22 is connected with a U-shaped bracket 221. The two branches of the bracket 221 are respectively slidably fitted in the corresponding guide grooves 11. The moving plate 22 is threadedly penetrated by a screw rod 26. The inner end of the screw rod 26 is rotatably connected to the clamping plate 23, and a knob is provided at the outer end of the screw rod 26. When the knob is rotated, the position of the clamping plate 23 can be adjusted, and thus the distance between the moving plate 22 and the clamping plate 23 can be adjusted to be suitable for circuit boards of different sizes.

[0033] Specifically, the regulation component 3 is arranged in the box body 12 and is connected to each clamping component for driving each bracket 221 to gather towards the center of the detection table 1, and then gathering the four clamping plates 23. The specific implementation method is as follows: As Figure 1 、 Figure 7 shown in the figure, four vertical plates 13 are arranged in the box body 12, and the regulation component 3 is arranged between the four vertical plates 13. The regulation component 3 includes a lifting rod 32 and a frustum 31 arranged at its top. The power source of the lifting rod 32 can be driven by a cylinder or an oil cylinder for adjusting the height of the frustum 31. Each clamping component further includes a sphere 21 and a horizontal rod 24. The horizontal rod 24 slidably penetrates 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 circumference of the horizontal rod 24. The sphere 21 is in close contact with one side of the frustum 31. In Figure 7 this state, at this time the frustum 31 is at the highest position, the four clamping components are in the open state, and the second spring 25 is in the compressed state.

[0034] Working principle of the clamping mechanism 2: Place the circuit board to be tested at the center of the detection table 1; the lifting rod 32 moves the frustum 31 downward. After the sphere 21 loses the extrusion force of the frustum 31, the sphere 21 will move towards the frustum 31 under the elastic force of the second spring 25, which is the gathering action. Because the sphere 21, the horizontal rod 24, the bracket 221, the moving plate 22, the clamping plate 23 and the screw rod 26 are equivalent to a whole, when the frustum 31 moves downward, this whole will gather towards the circuit board until the clamping plate 23 just clamps the circuit board. During this process, the clamping plate 23 also plays a role in finely adjusting the posture of the circuit board. When it is necessary to clamp circuit boards of different sizes, only the screw rod 26 corresponding to the clamping plate 23 needs to be rotated alone.

[0035] Specifically, as Figure 1 shown in the figure, the lifting mechanism 4 is connected to the box body 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 driving a lead screw with a motor, which is a conventional setting and its structure and principle will not be elaborated in detail.

[0036] Specifically, as Figures 1 - 6 shown, the probe mounting mechanism 5 is located above the inspection table 1 and includes a rectangular frame 51 and a probe board 53 ( Figure 2 ). A ring of steps 511 is provided on the inner wall of the rectangular frame 51 ( Figure 6 ). The probe board 53 is supported on the steps 511. A plurality of probes are installed at the bottom of the probe board 53 ( Figure 4 ). Through holes 531 are provided at the four right-angled corners of the probe board 53 ( Figure 5 ). Limit members 52 are provided at corresponding positions of the rectangular frame 51 ( Figure 1 ). The limit member 52 includes a dial plate 521, a column 522, and a pressing plate 523 slidably disposed on the outer 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. The bottom of the other end of the dial plate 521 is connected to the column 522. A first spring 524 is provided on the outer periphery of the column 522. The two ends of the first spring 524 are respectively connected to the dial plate 521 and the pressing plate 523 ( Figure 3 ). The bottom surface of the pressing plate 523 is in close contact with the probe board 53, and the column 522 corresponds to the through hole 531. The dial plate 521 has two rotation positions. When the limit member 52 rotates to the avoidance groove 512 on the inner wall of the rectangular frame 51 ( Figure 5 ), it is used to disassemble the probe board 53 and replace it with other types of probe boards 53, which is suitable for detecting different types of circuit boards. To make it easier to take out or place the probe board 53, as Figure 2 shown, the probe board 53 is provided with two handle holes 532.

[0037] Three points are explained here: ① Regarding the two rotation positions of the dial plate 521, the first position is to ensure that the column 522 exactly corresponds to the through hole 531, and the second position is to ensure that the limit member 52 is rotated into the avoidance groove 512; ② Whether the dial plate 521 is in the first position or the second position, the first spring 524 is in a compressed state; ③ The implementation method of the two rotation positions of the dial plate 521 belongs to the prior art. For example, electrical appliances such as microwave ovens and electric fans have this function, and the structure and principle of the positions are not elaborated in detail here.

[0038] Working principle of the probe mounting mechanism 5: Select the corresponding probe board 53 according to the type of the circuit board to be measured; Place the probe board 53 in the rectangular frame 51, and the probe board 53 is supported on the step 511. At this time, the top surface of the probe board 53, the bottom surface of the pressing plate 523 and the bottom surface of the avoidance groove 512 are flush, so as to smoothly rotate the limiting member 52 out of the avoidance groove 512 next; The staff rotates the four limiting members 52 in turn, so that the column 522 of each limiting member 52 faces 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 mounting mechanism 5 downward. The probes at the bottom of the probe board 53 first contact the circuit board. Then, the probes generate an upward force on the probe board 53, while the first spring 524 always has a downward force on the probe board 53. Therefore, the first spring 524 can play a buffering role during the process of the probes contacting the circuit board, prevent the circuit board from being damaged due to excessive probe pressure, and ensure the stable contact between the probes and the circuit board.

[0039] In the above solution of the probe mounting mechanism 5, when the probe board 53 contacts the circuit board, it can be buffered by the first spring 524. However, when the circuit board detection is completed and the probe mounting mechanism 5 moves upward, the probe board 53 will fall onto the step 511, and there is no buffer in this process. To solve this problem, as Figure 1 , Figure 5 , Figure 6 shown, preferably, the probe mounting mechanism 5 further 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 board 53 is supported on the buffer plate 55. Avoidance holes 552 are provided at the four right-angle positions of the buffer plate 55 corresponding to the through holes 531 for avoiding the columns 522.

[0040] Working principle of the preferably probe mounting mechanism 5: Select the corresponding probe board 53 according to the type of the circuit board to be measured; Place the probe board 53 in the rectangular frame 51, and the probe board 53 is supported on the buffer plate 55. The staff can slightly press down the probe board 53 to make the top surface of the probe board 53, the bottom surface of the pressing plate 523 and the bottom surface of the avoidance groove 512 flush, so as to smoothly rotate the limiting member 52 out of the avoidance groove 512 next; The staff rotates the four limiting members 52 in turn, so that the column 522 of each limiting member 52 faces 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 mounting mechanism 5 downward to make the probes contact the circuit board; After the detection is completed, use the lifting mechanism 4 to move the probe mounting mechanism 5 upward, and the buffer plate 55 and the plurality of fourth springs 54 play a buffering role on the probe board 53.

[0041] The above solution can clamp and fix circuit boards of different sizes and also detect different types of circuit boards. However, after the detection is completed, the bottom surface of the circuit board is in close contact with the detection table 1, so there is a problem that it is inconvenient to take out the circuit board. This embodiment adopts two methods to solve this problem:

[0042] The first method: As shown in Figures 8 - 10 , a receiving groove 14 is provided at the top of the detection table 1, and four round holes 15 are provided below the receiving groove 14. The device further includes a circuit board height adjustment component. The circuit board height adjustment component includes a base plate 61 and four vertical rods 62 provided at the bottom of the base plate 61. Four support plates 33 are circumferentially distributed at the bottom of the frustum 31. The long axis of the support plate 33 points to the central axis of the frustum 31, and the support plate 33 extends outward to the lower part of the corresponding round hole 15. The base plate 61 is located above the receiving groove 14 and has the same size as the receiving groove 14. The vertical rods 62 slide downward through the corresponding round holes 15 and support plates 33. A third spring 63 is provided between the support plate 33 and the detection table 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.

[0043] When in use, in the state of Figure 8 and Figure 10 , at this time, the frustum 31 is at the highest position, and the four clamping components are in the open state. The top surface of the base plate 61 is higher than the top surface of the detection table 1. Place the circuit board to be tested on the top surface of the base plate 61. The lifting rod 32 moves the frustum 31 downward, and the base plate 61 moves downward with the frustum 31. When the base plate 61 falls into the receiving groove 14, the circuit board stays on the top surface of the detection table 1. At this time, the clamping plate 23 has not yet contacted the circuit board. The lifting rod 32 continues to move the frustum 31 downward, and the base plate 61 will not move downward with it. Instead, 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 detection is completed, the lifting rod 32 moves the frustum 31 upward, first causing the clamping plate 23 to release the circuit board, and then the base plate 61 moves upward to lift the circuit board from the detection table 1 for easy removal of the circuit board.

[0044] The other method: As shown in Figure 8 , Figure 11 and Figure 12 , a receiving groove 14 penetrating the detection table 1 itself is provided at the center of the detection table 1. The device further includes a circuit board height adjustment component. The circuit board height adjustment component includes a base plate 61 and four vertical rods 62 provided at the bottom of the base plate 61. Four support plates 33 are circumferentially distributed at the bottom of the frustum 31. The base plate 61 is located above the receiving groove 14 and has the same size as the receiving groove 14. 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.

[0045] During use, place the circuit board to be tested on the top surface of the substrate 61; the lifting rod 32 moves the frustum 31 downward, and the substrate 61 moves downward with the frustum 31. When the substrate 61 drops into the receiving groove 14, the circuit board stays on the top surface of the detection table 1. At this time, the clamping plate 23 has not yet contacted the circuit board. The lifting rod 32 continues to move the frustum 31 downward, and the substrate 61 moves downward through the receiving groove 14 until the clamping plate 23 just clamps the circuit board and stops; after the circuit board detection is completed, the lifting rod 32 moves the frustum 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 detection table 1 for taking away the circuit board.

[0046] The above embodiments are only used to illustrate the technical ideas and features of the present invention, and do not represent the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent substitutions made to the present invention all fall within the scope of protection of the present invention.

Claims

1. A circuit board detection device, characterized in that, Comprising: A detection table (1) with a number of guide grooves (11) provided on the side walls around it, and the detection table (1) covers the top of the box body (12); A clamping mechanism (2), including four circumferentially distributed clamping components. Each clamping component includes a moving plate (22) and a clamping plate (23) both located on the top of the detection table (1). The moving plate (22) is connected with a bracket (221), and the bracket (221) is slidably fitted in the corresponding guide groove (11). A screw rod (26) passes through the moving plate (22) in a threaded manner, and the inner end of the screw rod (26) is rotatably connected to the clamping plate (23); A regulation component (3) is arranged inside the box body (12) and is connected to each clamping component for driving each bracket (221) to converge towards the center of the detection table (1); A lifting mechanism (4) is connected to the box body (12) through a support plate (41) for adjusting the height of the probe mounting mechanism (5); The probe mounting mechanism (5) is located above the detection table (1), including a rectangular frame (51) and a probe plate (53). A circle of steps (511) is provided on the inner wall of the rectangular frame (51), and the probe plate (53) is supported on the steps (511). Multiple probes are installed at the bottom of the probe plate (53). Through holes (531) are provided at the four right angles of the probe plate (53). Limiting members (52) are provided at the corresponding positions of the rectangular frame (51). The limiting member (52) includes a dial plate (521), a column (522), and a pressing plate (523) slidably arranged on the outer 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 is connected to the column (522). A first spring (524) is provided on the outer periphery of the column (522). The bottom surface of the pressing plate (523) is in close contact with the probe plate (53), and the column (522) corresponds to the through hole (531). The dial plate (521) has two rotation positions. When the limiting member (52) rotates to the avoidance groove (512) on the inner wall of the rectangular frame (51), it is used to disassemble the probe plate (53), and the bottom surface of the avoidance groove (512) is flush with the bottom surface of the pressing plate (523); Four vertical plates (13) are provided inside the box body (12), and the regulation component (3) is arranged between the four vertical plates (13). The regulation component (3) includes a lifting rod (32) and a frustum (31) provided at its top. The lifting rod (32) is used to adjust the height of the frustum (31). Each clamping component further includes a sphere (21) and a horizontal rod (24). The horizontal rod (24) slidably passes through the corresponding vertical plate (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 provided between the vertical plate (13) and the bracket (221). The second spring (25) is arranged on the outer periphery of the horizontal rod (24), and the sphere (21) is in close contact with one side surface of the frustum (31); The top of the detection table (1) is provided with a receiving groove (14), and four round holes (15) are provided below the receiving groove (14). The device further includes a circuit board height adjustment component, which includes a substrate (61) and four vertical rods (62) provided at the bottom of the substrate (61). Four support plates (33) are circumferentially distributed at the bottom of the frustum (31). The support plates (33) extend outward to the lower part of the corresponding round holes (15). The substrate (61) is located above the receiving groove (14), and their sizes are the same. The vertical rods (62) penetrate downward through the corresponding round holes (15) and support plates (33). A third spring (63) is provided between the support plate (33) and the detection table (1). The third spring (63) is located on the outer circumference of the vertical rod (62). The top surface of the substrate (61) is used to place the circuit board to be tested.

2. The circuit board detection device according to claim 1, wherein The probe mounting mechanism (5) further 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 board (53) is supported on the buffer plate (55). Avoidance holes (552) are provided at the four right-angled corners of the buffer plate (55) at positions corresponding to the through holes (531) for avoiding the columns (522).

3. The circuit board detection device according to claim 1, wherein The probe board (53) is provided with two handle holes (532).

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