Pressing plate mechanism and PCB detection equipment

Abstract

The utility model belongs to the technical field of PCB detection, and particularly relates to a pressing plate mechanism and PCB detection equipment. The pressing plate mechanism comprises a first supporting plate and a pressing plate; the first supporting plate comprises a supporting main body and at least one mounting part, the pressing plate is mounted on the supporting main body, one end of the mounting part is connected with the supporting main body, the other end of the mounting part is provided with a guide assembly, and the guide assembly is used for limiting the mounting part to move in the preset direction so that the pressing plate can be stacked on the material plate or leave the material plate. The mounting part and the pressing plate mechanism are limited by the guide assembly to only linearly move in the preset direction, so that the unstable conditions of inclination, deviation and the like of the pressing plate in the moving process are effectively reduced, the pressing plate can be accurately laminated on the material plate, the pressing plate can uniformly transmit pressure to the material plate, and a good flattening effect is realized.

Description

Technical Field

[0001] This utility model belongs to the field of PCB testing technology, and in particular relates to a pressure plate mechanism and PCB testing equipment. Background Technology

[0002] When performing back-drilling inspection on a PCB, the PCB is usually placed on a workbench, and a glass cover is placed on top of the workbench to flatten the PCB.

[0003] An existing pressure plate device includes a glass frame assembly, a worktable, a hinge assembly, and a lifting assembly. One end of the glass frame assembly is connected to one end of the worktable via the hinge assembly. The lifting assembly is mounted on the worktable and connected to the other end of the glass frame assembly. The glass frame assembly is raised or lowered via the lifting assembly.

[0004] However, in existing pressing devices, the glass frame assembly may experience uneven stress on the material plate during the pressing process, which affects the pressing effect of the material plate and the subsequent testing effect of the material plate. Utility Model Content

[0005] The technical problem to be solved by this utility model is that, in the existing pressing device, the glass frame assembly will have uneven local stress on the material plate during the pressing process. This utility model provides a pressing mechanism and PCB testing equipment.

[0006] To solve the above-mentioned technical problems, on the one hand, this utility model provides a pressure plate mechanism, including a first support plate and a pressure plate;

[0007] The first support plate includes a support body and at least one mounting part. The pressure plate is mounted on the support body. One end of the mounting part is connected to the support body, and the other end of the mounting part is provided with a guide component. The guide component is used to restrict the mounting part from moving in a preset direction so that the pressure plate is pressed onto the material plate or moves away from the material plate.

[0008] Optionally, the support body has an installation groove, which extends through the support body along the preset direction, and the pressure plate is embedded in the installation groove.

[0009] Optionally, the mounting groove includes a first mounting groove and a second mounting groove that are interconnected. The pressure plate is disposed in the first mounting groove and protrudes from the second mounting groove. The second mounting groove can accommodate the material plate when the pressure plate is stacked on the material plate.

[0010] Optionally, the pressure plate mechanism further includes a plurality of first pressure blocks, one end of which is connected to the support body, and the other end of which abuts against the pressure plate to prevent the pressure plate from disengaging from the first mounting groove.

[0011] Optionally, the guide assembly includes a first guide sleeve, which restricts the movement of the mounting portion along the preset direction.

[0012] Optionally, the pressure plate mechanism further includes a buffer member, which is installed on the support body and is used to buffer the first support plate when the pressure plate is stacked on the material plate.

[0013] On the other hand, this utility model embodiment provides a PCB inspection device, including a machine base, a guiding mechanism, an optical inspection mechanism, a lifting mechanism, an inspection platform, and a pressure plate mechanism as described above. The inspection platform and the guiding mechanism are mounted on the machine base. The guiding mechanism is connected to the output end of the lifting mechanism. The guiding mechanism is used to insert and cooperate with the guiding component so that the lifting mechanism can drive the pressure plate mechanism to move closer to or away from the inspection platform.

[0014] The detection platform is used to place the material plate, and the optical detection mechanism is used to detect the material plate.

[0015] Optionally, the testing platform includes a second support plate, a material support plate, and a second pressure block. The material support plate is mounted on the second support plate and is used to place the material plate. The second pressure block is disposed on the side of the material support plate opposite to the second support plate.

[0016] The pressure plate is provided with a first clearance hole, which is used to avoid the second pressure block.

[0017] Optionally, the detection platform further includes multiple limiting members, which are installed on the material support plate, and the multiple limiting members surround to form an area for placing the material plate;

[0018] The pressure plate is provided with a plurality of second clearance holes, and the plurality of second clearance holes and the plurality of limiting members are provided in a one-to-one correspondence. The second clearance holes are used to avoid the limiting members.

[0019] Optionally, a positioning pin is provided on the second support plate, and the guide assembly includes a second guide sleeve, which is used to engage with the positioning pin.

[0020] The pressure plate mechanism provided in this embodiment of the utility model can guide and limit the movement of the pressure plate mechanism by means of the guide component on the mounting part when the material plate needs to be flattened. This limits the mounting part and the pressure plate mechanism to only move in a straight line along a preset direction, effectively reducing instability such as tilting or offset of the pressure plate during movement. This ensures that the pressure plate can be accurately pressed onto the material plate and can uniformly transmit pressure to the material plate, achieving a good flattening effect and contributing to the subsequent optical inspection accuracy of the material plate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a pressure plate mechanism provided in an embodiment of the present invention;

[0022] Figure 2 This is a top view of a pressure plate mechanism provided in an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0024] Figure 4 This is a schematic diagram of the pressure plate mechanism and testing platform provided in one embodiment of the present invention.

[0025] The reference numerals in the accompanying drawings are as follows:

[0026] 10. Pressure plate mechanism;

[0027] 11. First support plate; 111. Support body; 1111. First mounting groove; 1112. Second mounting groove; 1113. Reserved hole; 112. Mounting part; 112a. First mounting part; 112b. Second mounting part; 1121. First guide sleeve; 1122. Second guide sleeve; 12. Pressure plate; 121. First clearance hole; 122. Second clearance hole; 13. First pressure block; 14. Buffer component;

[0028] 20. Testing platform;

[0029] 21. Second support plate; 211. Positioning pin; 22. Material support plate; 23. Second pressure block; 24. Limiting component. Detailed Implementation

[0030] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] like Figures 1 to 4As shown, an embodiment of the present invention provides a pressure plate mechanism 10, including a first support plate 11 and a pressure plate 12. The first support plate 11 includes a support body 111 and at least one mounting part 112. The pressure plate 12 is mounted on the support body 111 and is a component that directly contacts and transmits pressure to the material plate. One end of the mounting part 112 is connected to the support body 111, and the other end of the mounting part 112 is provided with a guide component. The guide component is used to restrict the mounting part 112 from moving in a preset direction, so that the pressure plate 12 may press against or move away from the material plate.

[0032] When the material plate needs to be flattened, the guide component on the mounting part 112 guides and limits the movement of the pressure plate mechanism 10, limiting the mounting part 112 and the pressure plate mechanism 10 to only move in a straight line along a preset direction. This effectively reduces instability such as tilting or offset of the pressure plate 12 during movement, ensuring that the pressure plate 12 can be accurately pressed onto the material plate. The pressure plate 12 can evenly transmit pressure to the material plate, achieving a good flattening effect, which helps to improve the accuracy of subsequent optical inspection of the material plate.

[0033] When performing back-drilling inspection on a PCB in a PCB inspection equipment, the PCB inspection equipment is equipped with a guide mechanism. The guide mechanism and the guide assembly cooperate with each other to restrict the movement direction of the mounting part 112. The PCB is located below the pressure plate mechanism 10, with the preset direction being vertical. The pressure plate 12 is mounted on the support body 111. When the mounting part 112 moves along the preset direction, the pressure plate 12 can contact and transmit pressure on the PCB, keeping the PCB flat.

[0034] The mounting part 112 is flat and is flush with the supporting body 111 on a horizontal plane.

[0035] In one specific embodiment, such as Figure 1 As shown, there are two mounting parts 112, namely a first mounting part 112a and a second mounting part 112b. There are two guide mechanisms on the PCB inspection equipment. One end of the first mounting part 112a is connected to one side edge of the support body 111, and the guide component at the other end of the first mounting part 112a is used to connect to one of the guide mechanisms. One end of the second mounting part 112b is connected to the other side edge of the support body 111, and the guide component at the other end of the second mounting part 112b is used to connect to the other guide mechanism. Through the cooperation of the two guide components with the guide mechanisms, the pressure plate 12 can be stably guided, improving the flattening accuracy of the pressure plate 12 on the material board and the stability of the entire flattening process.

[0036] The first mounting part 112a and the second mounting part 112b are arranged opposite to each other along the first direction. The size of the first mounting part 112a in the second direction is smaller than the size of the support body 111 in the second direction, and the size of the second mounting part 112b in the second direction is smaller than the size of the support body 111 in the second direction. The first direction is perpendicular to the second direction.

[0037] The supporting main body 111 is square, with the first direction being... Figure 2 The length direction of the central support body 111, and the second direction is Figure 2 The width direction of the main support body 111.

[0038] In one embodiment, a mounting groove is provided on the support body 111, and the mounting groove extends through the support body 111 in a preset direction. The pressure plate 12 is embedded in the mounting groove, so that when the pressure plate mechanism 10 moves in the preset direction and presses on the material plate, the lower surface of the pressure plate 12 can contact the material plate through the mounting groove. With this structural design, the pressure plate 12 can be integrated into the space occupied by the support body 111, so that the thickness of the pressure plate 12 will not accumulate separately in the vertical direction, thereby effectively reducing the overall thickness of the pressure plate mechanism 10.

[0039] In one embodiment, such as Figure 3 As shown, the mounting groove includes a first mounting groove 1111 and a second mounting groove 1112 that are interconnected. The pressure plate 12 is disposed in the first mounting groove 1111 and protrudes from the second mounting groove 1112. The second mounting groove 1112 can accommodate the material plate when the pressure plate 12 is pressed onto the material plate.

[0040] The first mounting groove 1111 serves as the main accommodating space for the pressure plate 12. Its size and shape are adapted to the pressure plate 12, allowing the pressure plate 12 to be securely embedded within it. This ensures precise positioning of the pressure plate 12 on the supporting body 111, preventing horizontal displacement, rotation, or other instability during movement. When the pressure plate 12 presses against the material plate, the material plate can enter the second mounting groove 1112 and abut against the pressure plate 12, enabling the pressure plate 12 to evenly transmit pressure onto the material plate, effectively flattening it.

[0041] In this design, on the horizontal plane, the cross-sectional area of ​​the first mounting groove 1111 is larger than that of the second mounting groove 1112, thus forming a step at the junction of the first mounting groove 1111 and the second mounting groove 1112. This step can limit the installation position of the pressure plate 12. When the pressure plate 12 is embedded in the first mounting groove 1111, the step can serve as a visual reference boundary to help the operator accurately determine whether the pressure plate 12 has been embedded to the appropriate depth, ensuring that the pressure plate 12 is horizontal in the first mounting groove 1111, which facilitates effective flattening when it comes into contact with the material plate.

[0042] In one embodiment, such as Figure 1 , Figure 2 As shown, the pressure plate mechanism 10 also includes a plurality of first pressure blocks 13. One end of the first pressure block 13 is connected to the support body 111, and the other end of the first pressure block 13 abuts against the pressure plate 12 to prevent the pressure plate 12 from disengaging from the first mounting groove 1111. When the pressure plate 12 presses against the material plate, the stopping action of the first pressure block 13 ensures that the pressure plate 12 can be stably embedded in the first mounting groove 1111, thereby ensuring that the pressure is transmitted evenly and stably to the material plate. This helps to reduce problems such as uneven local stress on the material plate and poor flattening effect caused by the position change of the pressure plate 12.

[0043] The first pressure block 13 is disposed at the joint between the first mounting groove 1111 and the pressure plate 12. A first screw hole is provided on one side of the first pressure block 13 along the first direction, and a second screw hole is provided at a corresponding position on the support body 111. The first pressure block 13 can be fixed to the support body 111 by screws passing through the first screw hole and the second screw hole in sequence. The other side of the first pressure block 13 along the first direction is located above the pressure plate 12 and abuts against the upper surface of the pressure plate 12, which can prevent the pressure plate 12 from shaking in the first mounting groove 1111.

[0044] In one embodiment, such as Figure 1 , Figure 2 As shown, the guiding assembly includes a first guide sleeve 1121, which can be connected to a guiding mechanism on the PCB inspection equipment to restrict the installation part 112 from moving along a preset direction. Through the connection between the first guide sleeve 1121 and the guiding mechanism, the pressure plate mechanism 10 can reciprocate along the preset direction under external driving force. The preset direction is vertical, and the pressure plate mechanism 10 can move up and down.

[0045] Preferably, the guiding mechanism on the PCB inspection equipment includes at least a pin, which can be inserted and engaged with the first guide sleeve 1121 to achieve guiding and positioning functions.

[0046] In one embodiment, such as Figure 1 , Figure 2 As shown, the support body 111 is provided with a plurality of reserved holes 1113. The reserved holes 1113 are used to install guide sleeves or bushings. When the cooperation between the first guide sleeve 1121 and the guide mechanism cannot meet the stability of the up and down movement, additional guide sleeves or bushings are installed through the reserved holes 1113 to apply constraints and guidance to the pressure plate mechanism 10 from other positions, thereby improving the overall movement stability.

[0047] In one embodiment, such as Figure 1As shown, the pressure plate mechanism 10 also includes a buffer 14, which is installed on the support body 111. The buffer 14 is used to buffer the first support plate 11 when the pressure plate 12 is stacked on the material plate, which can reduce the impact force generated during the pressing of the pressure plate 12 and prevent the support plate from damaging the material plate due to excessive speed.

[0048] The buffer element 14 can be, but is not limited to, foam strips.

[0049] Two buffers 14 are provided. One buffer 14 is provided on one side of the support body 111 along the first direction, and the other buffer 14 is provided on the other side of the support body 111 along the first direction. During the up and down movement, the two sides of the support body 111 along the first direction are close to the position where the external driving force is applied. By covering the key stress area of ​​the support plate with the two buffers 14, the impact of the impact force on the support body 111 and the entire pressure plate mechanism 10 can be reduced to the greatest extent.

[0050] In one embodiment, the pressure plate 12 includes optical glass and a glass film. The optical glass is mounted on the first support plate 11, and the glass film is attached to the surface of the optical glass facing the material plate. The glass film protects the optical glass, preventing scratches on its surface and ensuring that its light transmission performance is not affected. After a certain period of use, only the glass film needs to be replaced periodically.

[0051] On the other hand, this utility model embodiment provides a PCB inspection device, including a machine base, a guiding mechanism, an optical inspection mechanism, a lifting mechanism, an inspection platform 20, and a pressure plate mechanism 10 as described in the above embodiment. The inspection platform 20 and the guiding mechanism are mounted on the machine base. The guiding mechanism is connected to the output end of the lifting mechanism. The preset direction of the guiding mechanism is vertical. The guiding mechanism is used to interlock with the guiding components so that the lifting mechanism can drive the pressure plate mechanism 10 to move up and down, so that the pressure plate mechanism 10 moves closer to or away from the inspection platform 20. The inspection platform 20 is used to place the material board. As the pressure plate mechanism 10 moves closer to the inspection platform 20, the pressure plate 12 can press on the material board to achieve a flattening operation.

[0052] The optical inspection mechanism is used to inspect the material plate. After the material plate is flattened, the optical inspection mechanism begins to inspect the back-drilled holes on the material plate. After the inspection is completed, the pressure plate mechanism 10 moves upward and gradually moves away from the inspection platform 20, making it easier for the inspection platform 20 to place the next material plate.

[0053] The guide mechanism includes a pin. When the lifting mechanism drives the guide mechanism to move upward, the pin can be inserted into the first guide sleeve 1121 on the mounting part 112, so that the lifting mechanism can be connected to the pressure plate mechanism 10, thereby driving the pressure plate mechanism 10 away from the detection platform 20. After the detection platform 20 places the next material plate, the lifting mechanism drives the guide mechanism to move downward until the pressure plate mechanism 10 falls on the detection platform 20. At this time, the pin disengages from the first guide sleeve 1121, and the pressure plate mechanism 10 flattens the material plate.

[0054] In one embodiment, such as Figure 4 As shown, the testing platform 20 includes a second support plate 21, a material support plate 22, and a second pressure block 23. The material support plate 22 is mounted on the second support plate 21 and is used to hold the material plate. The second pressure block 23 is located on the side of the material support plate 22 away from the second support plate 21, and the material support plate 22 can be fixed on the second support plate 21 by means of the second pressure block 23.

[0055] The pressure plate 12 is provided with a first clearance hole 121, which is used to avoid the second pressure block 23. The position and size of the first clearance hole 121 on the pressure plate 12 correspond to the second pressure block 23, ensuring that when the pressure plate 12 moves downward to flatten the material plate, the pressure plate 12 will not collide or squeeze with the second pressure block 23.

[0056] The material of the support plate 22 is not limited to optical glass; any material with high strength, good wear resistance, and good light transmittance is acceptable.

[0057] In one embodiment, the area of ​​the second mounting groove 1112 on the horizontal plane is at least the same as the area of ​​the support plate 22, so that when pressed down, in addition to the material plate being able to be accommodated in the second mounting groove 1112, at least a portion of the support plate 22 can be accommodated in the second mounting groove 1112, thereby clamping the material plate between the pressure plate 12 and the support plate 22.

[0058] Furthermore, the depth of the second mounting groove 1112 is greater than the sum of the thicknesses of the material plate and the supporting plate 22. This way, after the pressing mechanism 10 presses down, there is a gap between the first support plate 11 and the second support plate 21, preventing them from contacting each other and avoiding the second support plate 21 from dispersing the pressure of the pressing mechanism 10 during the process of flattening the material plate.

[0059] In one embodiment, the optical inspection mechanism includes a first light source and a second light source. The first light source is positioned below the material support plate 22 and provides light to the inspection platform 20, illuminating the lower surface of the material plate from top to bottom. The second light source is positioned above the pressure plate mechanism 10 and provides light to the pressure plate mechanism 10, illuminating the upper surface of the material plate from top to bottom. By using both light sources to illuminate the back-drilled holes of the material plate, the edge capture of the back-drilled holes is improved, resulting in clearer imaging and increased accuracy of the product output.

[0060] In one embodiment, such as Figure 1 , Figure 4 As shown, the testing platform 20 also includes multiple limiting members 24, which are installed on the support plate 22. The multiple limiting members 24 enclose an area for placing the material plate. When the material plate is placed on the support plate 22, the placement position of the material plate is determined by the area enclosed by the multiple limiting members 24, defining the placement range of the material plate on the support plate 22. This can accommodate material plates of different sizes or other materials to be tested.

[0061] The pressure plate 12 is provided with a plurality of second clearance holes 122, and the plurality of second clearance holes 122 are provided in a one-to-one correspondence with a plurality of limiting members 24. The second clearance holes 122 are used to avoid the limiting members 24. The position and size of the second clearance holes 122 on the pressure plate 12 are corresponding to the limiting members 24 to ensure that when the pressure plate 12 moves downward to flatten the material plate, the pressure plate 12 will not collide or squeeze with the limiting members 24.

[0062] In one embodiment, such as Figure 1 , Figure 4 As shown, a positioning pin 211 is provided on the second support plate 21, and the guide assembly includes a second guide sleeve 1122. The second guide sleeve 1122 is used to engage with the positioning pin 211. When the lifting mechanism drives the pressure plate mechanism 10 to press on the detection platform 20, it can accurately guide the position of the pressure plate mechanism 10 on the detection platform 20, reducing the lateral offset and shaking of the pressure plate mechanism 10.

[0063] As an example, the guide assembly includes a first guide sleeve 1121 and a second guide sleeve 1122, which are spaced apart on the mounting portion 112 along a first direction. The guide mechanism includes a pin, and a positioning pin 211 is provided on the second support plate 21. The first guide sleeve 1121 can be inserted into the pin, and the second guide sleeve 1122 can be inserted into the positioning pin 211.

[0064] When the pressure plate mechanism 10 presses against the detection platform 20, the positioning pin 211 engages with the second guide sleeve 1122. As the lifting mechanism drives the guide mechanism upward, the pin moves upward with the guide mechanism until it engages with the first guide sleeve 1121, connecting the guide mechanism and the pressure plate mechanism. As the lifting mechanism continues to rise, it drives the pressure plate mechanism 10 upward, while the positioning pin 211 disengages from the second guide sleeve 1122. When the lifting mechanism drives the guide mechanism downward, the pressure plate mechanism 10 descends along with it. When the pressure plate mechanism 10 lands on the detection platform 20, the positioning pin 211 re-engages with the second guide sleeve 1122, while the pin gradually disengages from the first guide sleeve 1121. In this embodiment, the first guide sleeve 1121 and the second guide sleeve 1122 enable guidance and positioning of the pressure plate mechanism 10 at different stages.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure plate mechanism, characterized in that, Includes the first support plate and the pressure plate; The first support plate includes a support body and at least one mounting part. The pressure plate is mounted on the support body. One end of the mounting part is connected to the support body. A guide component is provided on the other end of the mounting part. The guide component is used to restrict the mounting part from moving in a preset direction so that the pressure plate is pressed onto the material plate or moves away from the material plate. The guide component is used to connect and cooperate with the guide mechanism of the PCB inspection equipment.

2. The pressure plate mechanism as described in claim 1, characterized in that, The support body has an installation groove, which extends through the support body along the preset direction, and the pressure plate is embedded in the installation groove.

3. The pressure plate mechanism as described in claim 2, characterized in that, The mounting slot includes a first mounting slot and a second mounting slot that are interconnected. The pressure plate is disposed in the first mounting slot and protrudes from the second mounting slot. The second mounting slot can accommodate the material plate when the pressure plate is stacked on the material plate.

4. The pressure plate mechanism as described in claim 3, characterized in that, The pressure plate mechanism further includes a plurality of first pressure blocks, one end of which is connected to the support body, and the other end of which abuts against the pressure plate to prevent the pressure plate from disengaging from the first mounting groove.

5. The pressure plate mechanism as described in claim 1, characterized in that, The guiding component includes a first guide sleeve, which is used to restrict the movement of the mounting part along the preset direction.

6. The pressure plate mechanism as described in claim 1, characterized in that, The pressure plate mechanism further includes a buffer member, which is installed on the support body and is used to buffer the first support plate when the pressure plate is stacked on the material plate.

7. A PCB inspection device, characterized in that, The device includes a machine base, a guide mechanism, an optical inspection mechanism, a lifting mechanism, an inspection platform, and a pressure plate mechanism as described in any one of claims 1-6. The inspection platform and the guide mechanism are mounted on the machine base. The guide mechanism is connected to the output end of the lifting mechanism. The guide mechanism is used to engage with the guide assembly so that the lifting mechanism can drive the pressure plate mechanism to move closer to or away from the inspection platform. The detection platform is used to place the material plate, and the optical detection mechanism is used to detect the material plate.

8. The PCB testing equipment as described in claim 7, characterized in that, The testing platform includes a second support plate, a material support plate, and a second pressure block. The material support plate is mounted on the second support plate and is used to place the material plate. The second pressure block is located on the side of the material support plate opposite to the second support plate. The pressure plate is provided with a first clearance hole, which is used to avoid the second pressure block.

9. The PCB testing equipment as described in claim 8, characterized in that, The detection platform also includes multiple limiting components, which are installed on the material support plate, and the multiple limiting components enclose an area for placing the material plate; The pressure plate is provided with a plurality of second clearance holes, and the plurality of second clearance holes and the plurality of limiting members are provided in a one-to-one correspondence. The second clearance holes are used to avoid the limiting members.

10. The PCB inspection equipment as described in claim 8, characterized in that, The second support plate is provided with a positioning pin, and the guide component includes a second guide sleeve, which is used to insert and cooperate with the positioning pin.

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