Strength detection mechanism for PCB (Printed Circuit Board) quality inspection

Abstract

The invention relates to the technical field of PCB detection, and discloses a strength detection mechanism for PCB board quality inspection, the strength detection mechanism comprises a mounting plate, a vertical plate arranged on the mounting plate, a top plate arranged at the upper end of the vertical plate, and a detection unit arranged on the mounting plate, the detection unit comprises a bidirectional bending part and a unidirectional bending part arranged at the upper end of the mounting plate, the bidirectional bending part comprises a rotating sleeve arranged at the upper end of the mounting plate, a coaxial rod arranged on the mounting plate and a bevel gear I arranged on the outer wall of the rotating sleeve; by arranging the detection unit, the mechanism can freely switch between two functions of one-way bending detection and two-way bending detection when detecting the strength of the PCB, meanwhile, the structures are the same in the detection process, the data error in the detection process is effectively reduced, the PCBs with different widths and lengths can be detected, and the detection efficiency is improved. And the flexibility of the mechanism is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB detection, and in particular to a strength detection mechanism for PCB board material inspection. Background Art

[0002] PCB board strength testing device is a device used to evaluate the strength and durability of printed circuit board (PCB) materials. It can simulate different situations that PCB may encounter in actual applications through different test methods to help detect its structure and physical properties. Such devices are essential to ensure the quality, reliability and performance of PCB in different working environments. Especially in the production process of electronic products, PCB board is the basis of bearing circuit components, so its strength and durability directly affect the performance and life of the final product. In existing devices, bending test is usually used to test the strength of PCB board. Bending test can simulate the stress caused by vibration or external force in actual use of PCB to observe whether PCB will crack, deform or break.

[0003] In the existing bending test, a unidirectional bending test device and a bidirectional bending test device are respectively used to perform different strength tests on the PCB board, but the following problems still exist: in the existing bending test device, two different devices are usually used to perform strength tests on the PCB board, but due to the different structures of the two devices, there are many variables in the detection process, which is easy to cause errors in the data during the detection, resulting in an inability to make a good judgment, and the existing bending test device cannot test boards of different lengths, making the detection process more complicated. Therefore, a strength detection mechanism for PCB board material inspection is designed, so that the mechanism can freely switch between the functions of unidirectional bending test and bidirectional bending test, and can adjust the placement plate at the same time, so that the strength of PCB boards of different widths and lengths can be detected. Summary of the invention

[0004] In view of the problems in the prior art that errors are easily generated during the strength detection of PCB boards using two devices, and that the strength detection of boards with different widths and lengths cannot be performed, a strength detection mechanism for PCB board material inspection is proposed.

[0005] The present application provides a strength detection mechanism for PCB board material inspection, the purpose of which is: by setting a detection unit, the mechanism can freely switch between the two functions of unidirectional bending detection and bidirectional bending detection when performing strength detection on PCB board materials, and at the same time, the structure during the detection process is the same, which effectively reduces the error of data during the detection process, and can detect PCB boards of different widths and lengths, effectively improving the flexibility of the mechanism.

[0006] The technical solution of the present invention is: a strength detection mechanism for PCB board material inspection, comprising a mounting plate, a vertical plate arranged on the mounting plate, a top plate arranged on the upper end of the vertical plate, and a detection unit arranged on the mounting plate, wherein the detection unit comprises a bidirectional bending component and a unidirectional bending component arranged on the upper end of the mounting plate;

[0007] The bidirectional bending component includes a rotating sleeve arranged on the upper end of the mounting plate, a coaxial rod arranged on the mounting plate, a bevel gear 1 arranged on the outer wall of the rotating sleeve, a bevel gear 2 arranged on the outer wall of the coaxial rod, a mounting ring 1 arranged on the outer wall of the rotating sleeve, a bearing rod arranged on the mounting ring 1, a spacer block arranged on the bearing rod, a mounting ring 2 arranged on the outer wall of the coaxial rod, and a deflection rod arranged on the mounting ring 2;

[0008] The coaxial rod is located in the rotating sleeve, and the axes of the two are on the same vertical horizontal line. The upper surface of the pad block and the upper surface of the deflection rod are at the same height. Adjustment components are installed in the deflection rod and the pad block, and a transmission component is installed between the bevel gear one and the bevel gear two.

[0009] Furthermore, the adjustment assembly includes two mounting grooves respectively opened on the raising block and the deflection rod, two adjusting screws respectively arranged in the two mounting grooves, two nut blocks respectively threadedly arranged on the two adjusting screws, two placement plates respectively arranged on the upper ends of the two nut blocks, and control knobs respectively arranged on one end of the two adjusting screws, the midpoint lines of the two placement plates and the center of the coaxial rod are on the same horizontal plane, and a clamping element 1 is installed in each of the two placement plates.

[0010] Furthermore, the clamping element includes two clamping grooves respectively opened on the two placing plates, two control screws respectively arranged in the two clamping grooves, two clamping nuts respectively threadedly arranged on the two control screws, and clamping rods respectively arranged at the lower ends of the two clamping nuts, and a rubber ring for increasing friction is sleeved on the side wall of each of the clamping rods.

[0011] Furthermore, the transmission assembly includes a support block arranged on the mounting plate, a servo motor arranged on the support block, a square plate arranged on the mounting plate, a support plate arranged on the square plate, a driving shaft arranged on the support plate, and a driving gear arranged on the driving shaft, wherein the upper and lower ends of the driving gear are respectively meshed with bevel gear 2 and bevel gear 1, and one end of the driving shaft is fixedly connected to the driving end of the servo motor.

[0012] Furthermore, the one-way bending component includes a hinged plate arranged at the lower end of the top plate, a rotating shaft arranged between the two hinged plates, and a fixed plate arranged on the rotating shaft, a clamping element 2 is installed on the fixed plate, the structure of the clamping element 1 is exactly the same as that of the clamping element 2, and a limiting component is installed at the lower end of the top plate.

[0013] Furthermore, the limit assembly includes two limit plates arranged at the lower end of the top plate, limit grooves opened on the two limit plates, multiple limit springs arranged inside the limit grooves, and a chamfered plate arranged at one end of the multiple limit springs, and the distance between the two limit plates is equal to the width of the fixed plate.

[0014] Furthermore, both ends of the fixing plate are provided with rounded corners.

[0015] Furthermore, pressure measuring devices are provided at one end of the two placement plates and the fixing plate.

[0016] Beneficial effects of the present invention:

[0017] 1. By setting up a one-way bending component, when the inspector performs a one-way bending test on the PCB plate, the PCB plate can be quickly clamped and fixed on the placement plate and the fixing plate, and the PCB plate can be bent in one direction by controlling the slow rotation of the servo motor. The PCB plate can be bent at different points by controlling the position of the placement plate, and the external force on the PCB plate can be read by the pressure measuring device. The operation is simple and convenient, and the detection efficiency is effectively improved.

[0018] 2. By setting up a bidirectional bending component, when the inspector performs a bidirectional bending test on the PCB board, the two ends of the PCB board are fixedly mounted on the corresponding placement plates, and the two ends of the PCB board are tested in a bidirectional manner by the same servo motor, which can effectively reduce errors and make the test data more comparable.

[0019] 3. By setting the adjustment component and the clamping element, unidirectional and bidirectional bending tests can be performed on PCB plates of different widths and lengths, which effectively improves the flexibility of the detection mechanism, reduces the detection cost during the detection process, and effectively improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure from a first viewing angle of the present invention;

[0021] Figure 2 is a schematic diagram of a second viewing angle stereoscopic structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 For the present invention Figure 1 Schematic diagram of the plane structure;

[0024] Figure 5It is a schematic diagram of the transmission assembly structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the fixed plate of the present invention after being deflected by 90°;

[0026] Figure 7 It is a schematic diagram of the internal structure of the placement plate of the present invention;

[0027] Figure 8 It is a schematic diagram of the fixing plate installation structure of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the limiting component of the present invention.

[0029] In the figure:

[0030] 1. Mounting plate; 2. Vertical plate; 3. Top plate; 4. Rotating sleeve; 5. Coaxial rod; 6. Bevel gear one; 7. Bevel gear two; 8. Mounting ring one; 9. Bearing rod; 10. Heightening block; 11. Mounting ring two; 12. Deflection rod; 13. Adjusting screw; 14. Nut block; 15. Placement plate; 16. Control knob; 17. Clamping nut; 18. Clamping rod; 19. Support block; 20. Servo motor; 21. Square plate; 22. Support plate; 23. Drive shaft; 24. Drive gear; 25. Hinge plate; 26. Rotating shaft; 27. Fixed plate; 28. Limit plate; 29. ​​Limit spring; 30. Chamfered plate; 31. Control screw; 32. Pressure measuring device. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] Example 1, reference Figure 1-Figure 5 as well as Figure 7 , which is the first embodiment of the present invention, provides a strength detection mechanism for PCB board material inspection, including a mounting plate 1, a vertical plate 2 fixedly mounted on the mounting plate 1, a top plate 3 fixedly mounted on the upper end of the vertical plate 2, and also includes a detection unit mounted on the mounting plate 1, the detection unit includes a bidirectional bending component and a unidirectional bending component mounted on the upper end of the mounting plate 1;

[0033] The bidirectional bending component includes a rotating sleeve 4 rotatably mounted on the upper end of the mounting plate 1, a coaxial rod 5 rotatably mounted on the mounting plate 1, a bevel gear 1 6 fixedly mounted on the outer wall of the rotating sleeve 4, a bevel gear 2 7 fixedly mounted on the outer wall of the coaxial rod 5, a mounting ring 1 8 fixedly mounted on the outer wall of the rotating sleeve 4, a bearing rod 9 fixedly mounted on the mounting ring 1 8, a spacer block 10 fixedly mounted on the bearing rod 9, a mounting ring 2 11 fixedly mounted on the outer wall of the coaxial rod 5, and a deflection rod 12 fixedly mounted on the mounting ring 2 11;

[0034] The coaxial rod 5 is located in the rotating sleeve 4, and the axes of the two are on the same vertical horizontal line. The upper surface of the pad block 10 and the upper surface of the deflection rod 12 are at the same height. Adjustment components are installed in the deflection rod 12 and the pad block 10, and a transmission component is installed between the bevel gear 1 6 and the bevel gear 2 7.

[0035] Reference Figure 2 and Figure 3 The adjustment component includes two mounting grooves respectively opened on the pad block 10 and the deflection rod 12, two adjusting screws 13 respectively rotatably installed in the two mounting grooves, two nut blocks 14 respectively threadedly installed on the two adjusting screws 13, two placement plates 15 respectively fixedly installed on the upper ends of the two nut blocks 14, and control knobs 16 respectively fixedly installed on one end of the two adjusting screws 13. The midpoint lines of the two placement plates 15 and the center of the coaxial rod 5 are on the same horizontal plane. A clamping element 1 is installed in each of the two placement plates 15. The clamping element 1 includes two clamping grooves respectively opened on the two placement plates 15, two control screws 31 respectively rotatably installed in the two clamping grooves, two clamping nuts 17 respectively threadedly installed on the two control screws 31, and clamping rods 18 respectively fixedly installed at the lower ends of the two clamping nuts 17. A rubber ring for increasing friction is sleeved on the side wall of each clamping rod 18.

[0036] The transmission assembly includes a support block 19 fixedly mounted on the mounting plate 1, a servo motor 20 fixedly mounted on the support block 19, a square plate 21 fixedly mounted on the mounting plate 1, a support plate 22 fixedly mounted on the square plate 21, a driving shaft 23 rotatably mounted on the support plate 22, and a driving gear 24 fixedly mounted on the driving shaft 23. The upper and lower ends of the driving gear 24 are respectively meshed with bevel gear 2 7 and bevel gear 1 6, and one end of the driving shaft 23 is fixedly connected to the driving end of the servo motor 20.

[0037] Specifically, the bidirectional bending component is used to perform bidirectional bending strength test on PCB plates. By placing the two ends of the PCB plate in two placement plates 15 respectively, and coaxially flipping the two placement plates 15 in opposite directions, the two ends of the PCB plate are bent at the same time to test the strength of the PCB plate. At the same time, the function of the adjustment component is: the two placement plates 15 are threadedly mounted on the corresponding adjustment screw 13 through the nut block 14, so that the staff can adjust the nut block 14 in the horizontal direction on the adjustment screw 13 by turning the control knob 16, thereby changing the spacing between the two placement plates 15, and performing bending tests on PCB plates of different lengths. The two placement plates 15 are coaxially deflected, and under the drive of the same servo motor 20, the forces generated on the two ends of the PCB are the same, thereby better improving the detection quality and ensuring the data accuracy during the detection.

[0038] The clamping element 1 is used to quickly clamp the two ends of the PCB board. When the staff fixes and installs the PCB board, they place the two ends of the PCB in the clamping grooves on the placement plate 15 respectively, and then rotate the control screw 31 so that the two clamping rods 18 move to the middle under the action of the clamping nut 17, thereby quickly fixing the two ends of the PCB board, and the movement distance of the two clamping nuts 17 is always the same, thereby ensuring that the PCB board is clamped in the middle of the corresponding clamping groove, and the middle of the clamping groove is on the same horizontal plane as the center of the coaxial rod 5, thereby ensuring that when the placement plate 15 drives the two ends of the PCB board to bend, it is deflected at the center of the coaxial rod 5. By changing the position of the clamping rod 18 clamping on the PCB board, the bidirectional bending component can perform bending tests on different positions of the PCB board, thereby more comprehensively testing the PCB board. The rubber ring on the clamping rod 18 can better clamp the PCB board and effectively improve the clamping effect of the PCB board. By changing the position of the clamping rod 18 clamping the PCB board, bidirectional bending tests can be performed on different positions of the PCB board. Effectively improve the flexibility of the device.

[0039] The function of the transmission assembly is as follows: since the rotating sleeve 4 and the coaxial rod 5 are rotatably mounted on the mounting plate 1 through bearings (not shown in the figure), the rotation between the two is not affected by each other, and the two are deflected coaxially. The transmission assembly drives the bevel gear 1 6 and the bevel gear 2 7 to rotate through the driving end of the servo motor 20 and the driving gear 24, and the rotation directions of the two groups are opposite, thereby driving the load-bearing rod 9 and the deflection rod 12 to move in the opposite direction, thereby realizing a bidirectional bending test on both ends of the PCB board.

[0040] During use, the staff rotates the adjusting screw 13 according to the length of the PCB board to be tested, so that the distance between the two placement plates 15 is equal to the length of the PCB board, and places the PCB board between the two placement plates 15. By rotating the control screw 31, the two clamping rods 18 clamp the two ends of the PCB board under the drive of the clamping nut 17, and turn on the servo motor 20. The servo motor 20 drives the driving shaft 23 to rotate through the driving end, and then drives the driving gear 24 to rotate. The driving gear 24 drives the bevel gear 2 7 and the bevel gear 1 6 at the upper and lower ends to rotate. The bevel gear 2 7 and the bevel gear 1 6 move in opposite directions relative to each other, and then drives the corresponding coaxial rod 5 and the rotating sleeve 4 to rotate, so that the placement plates 15 on the pad block 10 and the deflection rod 12 rotate synchronously in opposite directions. The two placement plates 15 rotate in opposite directions to bend the two ends of the PCB board, thereby realizing a bidirectional bending test of the PCB board.

[0041] Example 2, reference Figure 6-Figure 9, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the one-way bending component includes a hinged plate 25 fixedly installed at the lower end of the top plate 3, a rotating shaft 26 rotatably installed between the two hinged plates 25, and a fixed plate 27 fixedly installed on the rotating shaft 26. A clamping element 2 is installed on the fixed plate 27, and the structure of the clamping element 1 is exactly the same as that of the clamping element 2. A limiting component is installed at the lower end of the top plate 3, and a pressure measuring device 32 is provided at one end of the two placement plates 15 and the fixed plate 27.

[0042] Specifically, the structures of clamping element one and clamping element two are exactly the same. The principle of the unidirectional bending component is that after rotating the fixing plate 27 just above the coaxial rod 5, one end of the PCB sheet that needs a unidirectional bending test is fixed on the fixing plate 27 through the clamping element 2. At this time, one end of the PCB sheet is fixed by the fixing plate 27 just above the center of the coaxial rod 5, and the other end of the PCB sheet is fixedly installed in one of the placement plates 15. At this time, the servo motor 20 is turned on, and the servo motor 20 drives the corresponding placement plate 15 to deflect through the transmission assembly, thereby performing unidirectional bending on one end of the PCB sheet, performing a unidirectional bending test on the sheet, and then rotating the fixing plate 27 to change the position of the fixing plate 27, thereby realizing rapid conversion of different functions of the mechanism (i.e., conversion between unidirectional bending test and bidirectional bending test).

[0043] During use, when a unidirectional bending test is required, the staff fixes the PCB sheet to be measured on the placement plate 15 and the fixing plate 27 respectively through the clamping element 1 and the clamping element 2, and turns on the servo motor 20, so that the servo motor 20 drives the driving gear 24 to rotate through the driving shaft 23, and then drives the bevel gear 1 6 to rotate, and then drives the corresponding placement plate 15 holding the PCB sheet to deflect, while one end of the fixing plate 27 remains stationary, and the pressure measuring device 32 is used to read the forces at both ends of the PCB sheet to achieve a unidirectional bending test on the PCB sheet.

[0044] The remaining structures are the same as those of Example 1.

[0045] Example 3, reference Figure 6 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: the limit assembly includes two limit plates 28 fixedly mounted at the lower end of the top plate 3, limit grooves provided on the two limit plates 28, a plurality of limit springs 29 fixedly mounted inside the limit grooves, and a chamfered plate 30 fixedly mounted at one end of the plurality of limit springs 29, and the distance between the two limit plates 28 is equal to the width of the fixed plate 27. Both ends of the fixed plate 27 are provided with chamfered corners.

[0046] Specifically, the chamfered plate 30 is slidably installed in the corresponding limit groove, and the limit assembly is used to place the fixed plate 27 and limit it. When a bidirectional bending test is required, the fixed plate 27 is limited in the two chamfered plates 30, and the two ends of the PCB board are clamped in the two placement plates 15. When a unidirectional bending test is required, the fixed plate 27 is deflected 90°, and the two ends of the PCB board are respectively fixedly installed on the corresponding placement plate 15 and the fixed plate 27.

[0047] The remaining structure is the same as that of Example 2.

[0048] In summary, the working principle of the present invention is as follows: the staff rotates the adjusting screw 13 according to the length of the PCB plate to be tested so that the distance between the two placement plates 15 is equal to the length of the PCB plate, and places the PCB plate between the two placement plates 15. By rotating the control screw 31, the two clamping rods 18 clamp the two ends of the PCB plate under the drive of the clamping nut 17, and turn on the servo motor 20. The servo motor 20 drives the driving shaft 23 to rotate through the driving end, and then drives the driving gear 24 to rotate. The driving gear 24 drives the bevel gear 2 7 and the bevel gear 1 6 at the upper and lower ends to rotate. The bevel gear 2 7 and the bevel gear 1 6 move in opposite directions relative to each other, and then drives the corresponding coaxial rod 5 and the rotating sleeve 4 to rotate, so that the pad block 10 and the placement plates 15 on the deflection rod 12 rotate synchronously in opposite directions. The two placement plates 15 rotate in opposite directions to bend the two ends of the PCB board, and the corresponding pressure measuring device 32 reads the force of the plates at both ends of the PCB, thereby realizing a bidirectional bending test of the PCB plate.

[0049] When a unidirectional bending test is required, the staff fixes the PCB sheet to be measured on the placement plate 15 and the fixing plate 27 respectively through the clamping element 1 and the clamping element 2, and turns on the servo motor 20 so that the servo motor 20 drives the driving gear 24 to rotate through the driving shaft 23, thereby driving the bevel gear 1 6 to rotate, thereby driving the corresponding placement plate 15 holding the PCB sheet to deflect, while one end of the fixing plate 27 remains stationary, and the force at both ends of the PCB sheet is read through the pressure measuring device 32 to achieve a unidirectional bending test on the PCB sheet.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A strength detection mechanism for PCB material inspection, comprising a mounting plate (1), a vertical plate (2) arranged on the mounting plate (1), and a top plate (3) arranged on the upper end of the vertical plate (2), characterized in that: It also includes a detection unit arranged on the mounting plate (1), the detection unit comprising a bidirectional bending component and a unidirectional bending component arranged on the upper end of the mounting plate (1); The bidirectional bending component comprises a rotating sleeve (4) arranged on the upper end of the mounting plate (1), a coaxial rod (5) arranged on the mounting plate (1), a bevel gear 1 (6) arranged on the outer wall of the rotating sleeve (4), a bevel gear 2 (7) arranged on the outer wall of the coaxial rod (5), a mounting ring 1 (8) arranged on the outer wall of the rotating sleeve (4), a bearing rod (9) arranged on the mounting ring 1 (8), a padding block (10) arranged on the bearing rod (9), a mounting ring 2 (11) arranged on the outer wall of the coaxial rod (5), and a deflection rod (12) arranged on the mounting ring 2 (11); The coaxial rod (5) is located in the rotating sleeve (4), and the axes of the two are on the same vertical horizontal line. The upper surface of the padding block (10) and the upper surface of the deflection rod (12) are at the same height. The deflection rod (12) and the padding block (10) are both equipped with adjustment components. A transmission component is installed between the bevel gear 1 (6) and the bevel gear 2 (7).

2. A strength detection mechanism for PCB material inspection according to claim 1, characterized in that: The adjustment assembly comprises two installation grooves respectively provided on the pad block (10) and the deflection rod (12), two adjustment screws (13) respectively arranged in the two installation grooves, two nut blocks (14) respectively threadedly arranged on the two adjustment screws (13), two placement plates (15) respectively arranged on the upper ends of the two nut blocks (14), and control knobs (16) respectively arranged on one end of the two adjustment screws (13), the midpoint lines of the two placement plates (15) and the center of the coaxial rod (5) are on the same horizontal plane, and the two placement plates (15) are both installed with a clamping element.

3. A strength detection mechanism for PCB material inspection according to claim 2, characterized in that: The clamping element 1 comprises two clamping grooves respectively opened on two placement plates (15), two control screws (31) respectively arranged in the two clamping grooves, two clamping nuts (17) respectively threadedly arranged on the two control screws (31), and clamping rods (18) respectively arranged at the lower ends of the two clamping nuts (17), and a rubber ring for increasing friction is sleeved and installed on the side wall of each clamping rod (18).

4. A strength detection mechanism for PCB material inspection according to claim 3, characterized in that: The transmission assembly comprises a support block (19) arranged on the mounting plate (1), a servo motor (20) arranged on the support block (19), a square plate (21) arranged on the mounting plate (1), a support plate (22) arranged on the square plate (21), a drive shaft (23) arranged on the support plate (22), and a drive gear (24) arranged on the drive shaft (23), wherein the upper and lower ends of the drive gear (24) are respectively meshed with the bevel gear 2 (7) and the bevel gear 1 (6), and one end of the drive shaft (23) is fixedly connected to the drive end of the servo motor (20).

5. A strength detection mechanism for PCB material inspection according to claim 4, characterized in that: The one-way bending component comprises a hinge plate (25) arranged at the lower end of the top plate (3), a rotating shaft (26) arranged between the two hinge plates (25), and a fixed plate (27) arranged on the rotating shaft (26). A clamping element 2 is installed on the fixed plate (27). The structure of the clamping element 1 is completely the same as that of the clamping element 2. A limiting component is installed at the lower end of the top plate (3).

6. A strength testing mechanism for PCB material inspection according to claim 5, characterized in that: The limiting assembly comprises two limiting plates (28) arranged at the lower end of the top plate (3), limiting grooves provided on the two limiting plates (28), a plurality of limiting springs (29) arranged inside the limiting grooves, and a chamfered plate (30) arranged at one end of the plurality of limiting springs (29), wherein the distance between the two limiting plates (28) is equal to the width of the fixing plate (27).

7. A strength detection mechanism for PCB material inspection according to claim 6, characterized in that: Both ends of the fixing plate (27) are provided with rounded corners.

8. A strength testing mechanism for PCB material inspection according to claim 7, characterized in that: One end of the two placement plates (15) and the fixing plate (27) is provided with a pressure measuring device (32).

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