Circuit board anti-load testing device

Abstract

The invention relates to the technical field of electronic manufacturing, in particular to a circuit board anti-load testing device which comprises a bottom frame, a driving assembly, an electric clamping jaw and the like. A driving assembly is mounted on the bottom frame; the driving assembly is connected with an electric clamping jaw; and two clamping plates which are symmetrical left and right are mounted on the electric clamping jaw. According to the invention, the test control module supplies power to the circuit board and simulates that the circuit board is in a full-load working state, so that the working stability and safety of the circuit board in the full-load state when the circuit board is accidentally impacted are tested, the test conditions of a drop test are more in line with the actual situation, the accuracy of drop test data is improved, and the test efficiency is improved. The circuit board can be fixed and taken out by manually controlling the top cover to move up and down, the operation of repeatedly screwing and unscrewing screws is avoided, the testing efficiency is improved, the influence range of capacitor explosion can be limited through the fixing box and the top cover, and surrounding workers are prevented from being hurt due to capacitor explosion.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic manufacturing, and particularly to a circuit board anti-load test device. Background Art

[0002] Before the existing circuit boards leave the factory, anti-load tests are required, including electrical load tests and anti-impact tests. Among them, the electrical load test is to supply power to the circuit board through a test module to simulate the operation of the circuit board under full load conditions. The anti-impact test is to fix the circuit board on a fixture, connect the fixture to the circuit board, and let it freely fall from a certain height. After the circuit board drops and is impacted, the appearance and working performance of the circuit board are detected. These two tests are usually carried out independently. In this way, it is usually impossible to measure the working stability and safety of the circuit board under full load conditions when impacted. At the same time, the existing fixing of the circuit board usually uses screws, and during the test process, the staff needs to repeatedly screw the screws, which increases the preparation time required for the test and reduces the test efficiency.

[0003] In summary, the present application proposes a circuit board anti-load test device to improve the above-mentioned technical problems. Summary of the Invention

[0004] In order to overcome the shortcomings that the anti-load tests before the existing circuit boards leave the factory include independently carried out electrical load tests and anti-impact tests, this method cannot evaluate the working stability and safety of the circuit board under full load conditions when impacted, and the test method using screws requires repeatedly screwing the screws, increasing the preparation time of the test and reducing the test efficiency, the present invention provides a circuit board anti-load test device.

[0005] The technical implementation solution of the present invention is as follows: A circuit board anti-load test device includes a chassis, a driving component, and an electric gripper; the driving component is installed on the chassis; the electric gripper is connected to the driving component; two symmetrically arranged clamping plates are installed on the electric gripper; it further includes a fixing box, a top cover, a fixing component, a test control module, and a first air duct; a fixing box for placing the circuit board is clamped between the two clamping plates; a positioning groove is provided in the middle of the chassis; the size and shape of the positioning groove are exactly matched with the bottom contour of the fixing box; the top cover is slidably connected to the fixing box; a sealing cavity is formed between the lower sides of the fixing box and the top cover; a fixing component is installed on the fixing box; the circuit board is clamped and fixed by the fixing component; a test control module for power-on testing the electrical load performance of the circuit board is fixedly connected to the electric gripper; a socket is arranged in the fixing box; the socket is connected to the test control module through a control cable; the test control module is communicated with an external air supply device; a first air duct is communicated between the test control module and the sealing cavity.

[0006] More preferably, in the above circuit board anti-load test device, the fixing assembly includes a first carriage, a fixing rod, a second carriage, and a limiting base; a plurality of first carriages are slidably connected to the top cover; two fixing rods for fixing the circuit board are slidably connected to each first carriage; a plurality of second carriages are slidably connected to the fixing box; two limiting bases are slidably connected to each second carriage; a round hole corresponding to the fixing rod is provided in each limiting base; locking bolts are installed on each first carriage, fixing rod, second carriage, and limiting base, and the sliding state can be released or restricted through the locking bolts; a pressing plate portion is provided on the lower side of each fixing rod.

[0007] More preferably, in the above circuit board anti-load test device, the driving assembly includes a first slide rail and a first electric slider; the first slide rail is fixedly connected to the base frame; the first slide rail is in a vertical state; the first electric slider is slidably connected to the first slide rail; the first electric slider is fixedly connected to the electric gripper.

[0008] More preferably, the surface of the clamping plate is covered with an anti-slip rubber material.

[0009] More preferably, in the above circuit board anti-load test device, a first driving member and an insertion plate are further included; a first driving member is fixedly connected to the opposite sides of the two clamping plates; an insertion plate for driving the top cover to move up and down is fixedly connected to the telescopic end of each first driving member; two symmetrically arranged on the left and right are fixedly connected to the upper end of the top cover; a through groove corresponding to the insertion plate is provided on each of the two connecting plates.

[0010] More preferably, in the above circuit board anti-load test device, a sealing ring for improving the sealing performance of the sealing cavity is fixedly connected to the connection surface between the fixing box and the top cover.

[0011] More preferably, the fixing box, the top cover, and their connecting parts are all made of a composite material of carbon fiber reinforced plastic, which has good impact conduction performance, durability, and insulation.

[0012] More preferably, in the above circuit board anti-load test device, a second air pipe, a connecting pipe, and an airbag are further included; the second air pipe is fixedly connected to the insertion plate on the left; an air inlet is provided on the second air pipe, and the air inlet is communicated with an external air supply device; the connecting pipe is fixedly connected to the top cover; one end of the connecting pipe is an insertion interface, and the insertion interface is located on the insertion plate on the left; the other end of the connecting pipe is communicated with a plurality of branch pipes; a self-sealing quick connector is provided at the insertion interface; an airbag for improving the installation stability of the circuit board is fixedly connected to the lower end of each fixing rod; a cavity is provided in each fixing rod; the cavity is communicated with the inside of the airbag; the cavity in each fixing rod is communicated with the adjacent branch pipe.

[0013] More preferably, in the above circuit board anti-load test device, there is also an inspection system, which includes a moving component, a fixing plate, and a camera; the moving component is fixedly connected to the chassis; the fixing plate is connected to the moving component; the moving component drives the fixing plate to move back and forth and left and right; two cameras for inspecting the surface cracks of the circuit board are symmetrically installed up and down on the fixing plate.

[0014] More preferably, in the above circuit board anti-load test device, the moving component includes a second driving member, a second slide rail, and a second electric slider; the second driving member is fixedly connected to the chassis, and the second driving member is an electric push rod; the telescopic end of the second driving member is fixedly connected to the second slide rail; the second electric slider is slidably connected to the second slide rail; the second electric slider is fixedly connected to the fixing plate.

[0015] Compared with the prior art, the present invention has the following advantages: The test control module supplies power to the circuit board to simulate the working state of the circuit board under full load, so as to test the working stability and safety of the circuit board when it is accidentally impacted under full load, making the test conditions of the drop test more in line with the actual situation and improving the accuracy of the drop test data; By manually controlling the up and down movement of the top cover, the fixing and removal of the circuit board can be realized, eliminating the operation of repeatedly tightening and loosening screws, improving the test efficiency, and the fixing box and the top cover can limit the influence range of capacitor explosion, avoiding the harm to the surrounding staff caused by capacitor explosion; The peripheral air supply device conveys airflows at different temperatures to the test control module, so that the circuit board is in high-temperature and low-temperature states respectively, making the test conditions of the electrical load fit the actual use environment, and then the test control module conducts electrical load tests on the test circuit board, improving the accuracy and reliability of the electrical load test results; When dropping, by pumping air out of the sealed cavity, the top cover is firmly stuck on the inner wall of the fixing box and cannot move, thus avoiding the situation that the top cover moves slightly due to the impact during dropping, so that the pressing plate part always fits on the circuit board, ensuring the stability and firmness of the installation and fixation of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the circuit board anti-load test device of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the combination of the chassis, the driving component, and the electric gripper of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the combination of the electric gripper, the clamping plate, and the first driving member of the present invention; Figure 4 For the present invention Figure 3 The enlarged view at A; Figure 5 Schematic three-dimensional structure diagram of the fixed box, top cover and test control module of the present invention; Figure 6 Schematic three-dimensional structure diagram of the top cover, first sliding carriage and fixed rod of the present invention; Figure 7 Cross-sectional view of the fixed rod and airbag of the present invention; Figure 8 Schematic three-dimensional structure diagram of the fixed box, second sliding carriage and limit base of the present invention; Figure 9 Schematic three-dimensional structure diagram of the second sliding carriage and limit base of the present invention; Figure 10 Schematic three-dimensional structure diagram of the inspection system of the present invention; Figure 11 Diagram of the fixed state of the circuit board of the present invention; Figure 12 Diagram of the inspection state of the circuit board of the present invention; Figure 13 Top view of the circuit board of the present invention.

[0017] The markings of each component in the drawings are as follows: 1 - chassis, 1001 - alignment groove, 2 - electric gripper, 2001 - clamping plate, 3 - circuit board, 3001 - screw hole, 4 - fixed box, 4001 - socket, 4002 - sealing cavity, 5 - top cover, 5001 - overlapping plate, 6 - first sliding carriage, 7 - fixed rod, 7001 - pressing plate part, 7002 - cavity, 8 - second sliding carriage, 9 - limit base, 10 - test control module, 11 - first air pipe, 201 - first slide rail, 202 - first electric slider, 203 - first driving member, 204 - insertion plate, 205 - second air pipe, 20501 - air inlet, 206 - connecting pipe, 20601 - insertion interface, 20602 - branch pipe, 207 - airbag, 301 - second driving member, 302 - second slide rail, 303 - second electric slider, 304 - fixing plate, 305 - camera. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0019] Refer to Figures 1-9 and Figures 11-13As shown in the figure, a circuit board anti-load test device includes a chassis 1, a driving component, and an electric gripper 2. The driving component is installed on the chassis 1. The electric gripper 2 is connected to the driving component. Two symmetrically arranged clamping plates 2001 are installed on the electric gripper 2. It further includes a fixed box 4, a top cover 5, a fixing component, a test control module 10, and a first air pipe 11. The fixed box 4 is clamped between the two clamping plates 2001. A positioning groove 1001 is formed in the middle of the chassis 1. The size and shape of the positioning groove 1001 are exactly matched with the bottom contour of the fixed box 4. The top cover 5 is slidably connected to the fixed box 4. A sealed cavity 4002 is formed between the lower sides of the fixed box 4 and the top cover 5. A fixing component is installed on the fixed box 4. The circuit board 3 is clamped and fixed by the fixing component. Four screw holes 3001 are formed in the circuit board 3. The test control module 10 is fixedly connected to the electric gripper 2. A socket 4001 is arranged in the fixed box 4. The socket 4001 is connected to the test control module 10 through a control cable. The test control module 10 is communicated with an external air supply device. A first air pipe 11 is communicated between the test control module 10 and the sealed cavity 4002.

[0020] The fixing component includes a first sliding frame 6, a fixing rod 7, a second sliding frame 8, and a limiting base 9. Two symmetrically arranged first sliding frames 6 are slidably connected to the top cover 5. Two fixing rods 7 are slidably connected to each first sliding frame 6. Two symmetrically arranged second sliding frames 8 are slidably connected to the fixed box 4. Two limiting bases 9 are slidably connected to each second sliding frame 8. A round hole corresponding to the fixing rod 7 is formed in each limiting base 9. A locking bolt is installed on each of the first sliding frame 6, the fixing rod 7, the second sliding frame 8, and the limiting base 9. The sliding state can be released or restricted through the locking bolt. A pressing plate portion 7001 is arranged on the lower side of each fixing rod 7.

[0021] The driving component includes a first slide rail 201 and a first electric slider 202. The first slide rail 201 is fixedly connected to the chassis 1. The first slide rail 201 is in a vertical state. The first electric slider 202 is slidably connected to the first slide rail 201. The first electric slider 202 is fixedly connected to the electric gripper 2.

[0022] To improve the stability of the clamping plate 2001 for clamping the fixed box 4, the surface of the clamping plate 2001 is covered with an anti-slip rubber material.

[0023] It further includes a first driving member 203 and an insertion plate 204. A first driving member 203 is fixedly connected to the opposite sides of the two clamping plates 2001. The first driving member 203 is an electric push rod. An insertion plate 204 is fixedly connected to the telescopic end of each first driving member 203. Two symmetrically arranged latching plates 5001 are fixedly connected to the upper end of the top cover 5. A through groove corresponding to the insertion plate 204 is formed in each latching plate 5001.

[0024] A sealing ring is fixedly connected to the connection surface between the fixed box 4 and the top cover 5.

[0025] Furthermore, to ensure that the fixed box 4, the top cover 5, and their connecting parts will not be damaged under long-term drop tests, the fixed box 4, the top cover 5, and their connecting parts are all made of a composite material of carbon fiber reinforced plastic, which has good impact conduction performance, durability, and insulation.

[0026] The following is a detailed description of the anti-load detection of the circuit board 3: Before the fixed circuit board 3, the electric gripper 2 and the clamping plate 2001 are located at the lower part of the first slide rail 201. The fixing box 4 is placed on the alignment groove 1001 manually. The horizontal and vertical distances between the four screw holes 3001 on the circuit board 3 are measured by the staff. Then, the staff push the two second slide frames 8 to slide in the fixing box 4 and push the limit base 9 to slide on the adjacent second slide frame 8, so as to adjust the horizontal and vertical distances between the four limit bases 9, making the distribution distance of each limit base 9 consistent with the distribution distance of the screw holes 3001, and tightening the locking bolts to limit the sliding state. Similarly, the distribution distances of the fixing rods 7 on the two first slide frames 6 are also made consistent with the distribution distance of the screw holes 3001. Then, the circuit board 3 to be tested is placed on the limit bases 9, and each screw hole 3001 is aligned with the round hole of the corresponding limit base 9. Then, one end of the test cable is plugged into the detection port of the circuit board 3, and the other end of the test cable is plugged into the socket 4001. Then, the staff cover the top cover 5 on the upper side of the fixing box 4. At this time, each fixing rod 7 is aligned with the corresponding screw hole 3001. Then, the staff press the top cover 5 downward manually. The edge of the top cover 5 slides downward on the inner wall of the fixing box 4, thereby driving the fixing rod 7 to insert downward into the corresponding screw hole 3001 until the pressing plate part 7001 fits with the screw hole 3001. At this time, the fixing rod 7 passes through the screw hole 3001 and enters the corresponding limit base 9, thus completing the fixation of the circuit board 3 through the cooperation of the fixing rod 7 and the limit base 9. It should be noted that when the top cover 5 slides on the inner wall of the fixing box 4, the gap between the edge of the top cover 5 and the inner wall of the fixing box 4 is filled with a sealing ring to improve the sealing performance of the sealing cavity 4002. At the same time, the friction force with the inner wall of the fixing box 4 is increased through the sealing ring to prevent the top cover 5 from sliding randomly on the inner wall of the fixing box 4 and improve the installation firmness of the circuit board 3. After that, the electrical load test of the circuit board 3 can be carried out through the test control module 10 to detect the electrical load performance of the circuit board 3. And at this time, the fixing box 4 is located between the two clamping plates 2001. The two clamping plates 2001 move towards each other through the electric gripper 2 to clamp the fixing box 4. The surface of the clamping plate 2001 is covered with an anti-slip rubber material, thereby increasing the friction force between the clamping plate 2001 and the fixing box 4 and improving the stability of the clamping plate 2001 clamping the fixing box 4. Then, control the first electric slider 202 to move upward on the first slide rail 201, thereby driving the electric gripper 2 and its connecting parts and the circuit board 3 to move upward. When the circuit board 3 reaches the set height, it stops moving. Then, control the two clamping plates 2001 to open, so that the fixing box 4 and its connecting parts and the circuit board 3 freely fall to the bottom frame 1. Here, it should be noted that the lengths of the control cable between the test control module 10 and the fixing box 4 and the first air pipe 11 are both greater than the height of the drop test. Therefore, the control cable and the first air pipe 11 are in a slack state during the drop, and will not affect the falling speed and direction of the fixing box 4.When the fixing box 4 collides with the bottom of the chassis 1, the impact generated by the fall is transmitted to the circuit board 3, thus completing a drop test of the circuit board 3.

[0027] During actual use, there is a situation where the circuit board 3 drops during the working state. At this time, the impact on the circuit board 3 will damage internal electronic components such as capacitors and resistors, resulting in the circuit board 3 malfunctioning during operation. In severe cases, the circuit board 3 will be damaged. Conventional testing methods usually conduct electrical load testing and drop testing separately. In this way, the testing conditions deviate from the actual use conditions, resulting in a decrease in the accuracy of the test results. Therefore, during the fall, the circuit board 3 is powered by the test control module 10 to simulate the working state of the circuit board 3 under full load, so as to test the working stability and safety of the circuit board 3 when it is accidentally impacted under full load, making the testing conditions of the drop test more in line with the actual situation and improving the accuracy of the drop test data. On this basis, the conventional fixing method for the circuit board 3 is to use screws. When it is necessary to test multiple circuit boards 3 one by one, for each circuit board 3, operations such as tightening and loosening the screws are required, which increases the time required for test preparation and reduces the test efficiency. Compared with the conventional fixing method, only by manually controlling the up and down movement of the top cover 5 can the fixing and removal of the circuit board 3 be realized, eliminating the operations of repeatedly tightening and loosening the screws, improving the test efficiency. Moreover, in the drop test, if the capacitor in the circuit board 3 is damaged due to impact, it is easy to cause the capacitor to short-circuit, resulting in the explosion of the capacitor. Therefore, the fixing box 4 and the top cover 5 can limit the influence range of the capacitor explosion and prevent the surrounding staff from being injured by the capacitor explosion.

[0028] Since the drop test of the same circuit board 3 usually needs to be carried out multiple times, after the first drop test is completed, due to the fact that the fixing box 4 will displace a certain distance during the fall, at this time, it is necessary to manually place the fixing box 4 in the middle of the chassis 1 again, and then control the first electric slider 202 to drive the electric gripper 2 and the clamping plate 2001 to move downward to the bottom of the chassis 1, and open the clamping plate 2001. Subsequently, the fixing box 4 is clamped by controlling the clamping plate 2001 for the next drop test. Here, it should be noted that by adjusting the position of the first electric slider 202 on the first slide rail 201, the circuit board 3 can be dropped at different heights in ascending order, so as to test the limit height at which the circuit board 3 is damaged due to the fall and improve the comprehensiveness of the drop test results of the circuit board 3. Here, it should be noted that the fixing box 4, the top cover 5 and their connecting parts are all made of a composite material of carbon fiber reinforced plastic, which has good impact conduction performance, durability and insulation, so as to ensure that the fixing box 4, the top cover 5 and their connecting parts will not be damaged under long-term drop tests.

[0029] During the actual operation of the circuit board 3, it will be in different temperature environments. However, the test environment of conventional electrical loads is single and cannot reflect the actual usage situation. Therefore, before the drop test, the temperature of the output air flow can be adjusted through the peripheral air supply device, so as to simulate the working conditions of the circuit board 3 in high-temperature and low-temperature environments. Subsequently, air flows at different temperatures are sent to the test control module 10 through the peripheral air supply device, and the air flows enter the sealing cavity 4002 through the first air pipe 11. According to the air flows under different conditions, the circuit board 3 is respectively in high-temperature and low-temperature states, so that the test conditions of the electrical load are in line with the actual usage environment. Subsequently, the test control module 10 conducts an electrical load test on the circuit board 3 to improve the accuracy and reliability of the electrical load test results. Similarly, during the drop test, the drop situation of the circuit board 3 in different temperature environments can also be simulated, so as to improve the accuracy and reliability of the drop test results. It should be noted that the circuit board 3 can be isolated from the external environment through the combined action of the fixed box 4 and the top cover 5, reducing the influence of the external environment on the test environment in the sealing cavity 4002.

[0030] It is also considered that during the repeated drop test, the fixed box 4 and the top cover 5 are constantly impacted, which is likely to cause a slight movement of the top cover 5, so that the pressing plate part 7001 of the fixed rod 7 moves slightly upward. In this way, it is easy to cause the circuit board 3 to shake between the fixed rod 7 and the limit base 9, and it is easy to cause a large amplitude of jitter of the circuit board 3 in the subsequent drop test, and then cause damage to the circuit board 3. Therefore, during the drop test and before controlling the electric gripper 2 to release the clamping plate 2001, at this time, control the peripheral air supply device to stop supplying air and conduct reverse air extraction, so that the air in the sealing cavity 4002 enters the peripheral air supply device in turn through the first air pipe 11 and the test control module 10, making the sealing cavity 4002 in a vacuum state. Subsequently, control the electric gripper 2 to release the clamping plate 2001, so that the fixed box 4 and its connecting parts fall freely. During this process, there is a pressure difference between the external environment above the top cover 5 and the sealing cavity 4002 below the top cover 5, so that the top cover 5 is firmly stuck on the inner wall of the fixed box 4 and cannot move through the pressure difference between the inside and the outside. In this way, it is avoided that the top cover 5 is slightly moved due to the impact of the drop, so that the pressing plate part 7001 always fits on the circuit board 3, ensuring the stability and firmness of the installation and fixation of the circuit board 3. Embodiment

[0031] Based on Embodiment 1, as Figures 4-8 and Figures 10-13As shown in the figure, it further includes a second gas pipeline 205, a connecting pipe 206 and an airbag 207; a second gas pipeline 205 is fixedly connected to the left plug board 204; an air inlet 20501 is provided on the second gas pipeline 205, and the air inlet 20501 is communicated with an external gas supply device; a connecting pipe 206 is fixedly connected to the top cover 5; one end of the connecting pipe 206 is an insertion interface 20601, and the insertion interface 20601 is located on the left plug board 204; the other end of the connecting pipe 206 is communicated with four branch pipes 20602; a self-sealing quick connector is provided at the insertion interface 20601; a gasbag 207 is fixedly connected to the lower end of each fixing rod 7; each fixing rod 7 is provided with a cavity 7002; the cavity 7002 is communicated with the inside of the airbag 207; the cavity 7002 in each fixing rod 7 is communicated with the adjacent branch pipe 20602.

[0032] It further includes an inspection system, and the inspection system includes a moving component, a fixing plate 304 and a camera 305; a moving component is fixedly connected to the front side of the chassis 1; a fixing plate 304 is connected to the moving component; the fixing plate 304 is driven by the moving component to move back and forth and left and right; two cameras 305 are symmetrically installed on the fixing plate 304 up and down.

[0033] The moving component includes a second driving member 301, a second slide rail 302 and a second electric slider 303; the second driving member 301 is fixedly connected to the front side of the chassis 1, and the second driving member 301 is an electric push rod; the telescopic end of the second driving member 301 is fixedly connected to the second slide rail 302; a second electric slider 303 is slidably connected to the second slide rail 302; the second electric slider 303 is fixedly connected to the fixing plate 304.

[0034] After the circuit board 3 undergoes a single drop test, in order to detect the impact resistance of the circuit board 3, the entire circuit board 3 needs to be further inspected to observe whether there are cracks or fractures in the board components. Moreover, since the area around the screw hole 3001 of the circuit board 3 is greatly affected by the impact force generated during the drop, the area around the screw hole 3001 of the circuit board 3 is the key inspection area. For example, in the conventional test method, it is necessary to first unscrew the fixed screws, then remove the circuit board 3 and send it to the inspection equipment for inspection. After the inspection is completed, the circuit board 3 is fixed in the detection device again. Thus, the circuit board 3 needs to be repeatedly disassembled and assembled, and the operation steps for inspecting the circuit board 3 are cumbersome and inefficient.

[0035] Therefore, after the circuit board 3 completes a drop test, the fixing box 4 is manually placed on the alignment groove 1001 again. The alignment groove 1001 can ensure that the position of each manual placement is the same. In this way, when the two clamping plates 2001 of the control electric gripper 2 clamp the fixing box 4 again, at this time, the insertion plate 204 is aligned with the adjacent overlapping plate 5001. Subsequently, the first driving members 203 and the insertion plates 204 on the left and right sides are driven by the clamping plates 2001 to move towards each other, so that the two insertion plates 204 are respectively clamped on the adjacent overlapping plates 5001. Then, the first electric slider 202 is controlled to drive the fixing box 4 and its connecting parts to move upward until the upper surface of the fixing box 4 is lower than the lower surface of the camera 305 on the lower side of the fixing plate 304. Subsequently, the first driving member 203 is controlled to drive the insertion plate 204 and the overlapping plate 5001 to move upward, so that the top cover 5 and the connecting parts move upward, and the top cover 5 is separated from the fixing box 4 until the fixing rod 7 is located above the camera 305 on the upper side of the fixing plate 304. At this time, the fixing rod 7 is separated from the screw hole 3001, and the screw hole 3001 and the surrounding parts are not blocked by the fixing rod 7. Then, the second driving member 301 is controlled to drive the second slide rail 302, the second electric slider 303 and their connecting parts to move backward, so that the camera 305 on the lower side of the fixing plate 304 faces the circuit board 3. At the same time, the second electric slider 303 is controlled to move left and right on the second slide rail 302, so that the camera 305 moves back and forth and left and right above the circuit board 3. In this way, the surface of the circuit board 3 and the parts around the screw hole 3001 are photographed and inspected by the camera 305. After the inspection is completed, the camera 305 is controlled to move to the initial position, and then the first driving member 203 is controlled to move the top cover 5 downward, so that the fixing rod 7 is inserted into the screw hole 3001 again, thus completing the fixing of the circuit board 3. At this time, the next drop test can be continued. Compared with the conventional test method, during the preparation time from the completion of one drop test to the start of the next drop test, the operations of the staff to disassemble the fixing screws and take the circuit board 3 are omitted, and the surface of the circuit board 3 and the parts around the screw hole 3001 can be inspected. In this way, the inspection efficiency of the circuit board 3 is improved, and the coherence of multiple drop tests is improved. It should be noted here that the first driving member 203 can replace the staff to press the top cover 5 downward and extract it upward, reducing the workload of the staff.

[0036] It is also considered that when the fixing rod 7 is inserted into the screw hole 3001, in order to prevent the circuit board 3 from moving laterally due to the gap between the fixing rod 7 and the screw hole 3001, the diameter of the part of the fixing rod 7 below the pressing plate part 7001 is usually the same as the inner diameter of the screw hole 3001. Thus, when the top cover 5 drives the fixing rod 7 to move upward, the circuit board 3 is not easily separated from the fixing rod 7. In this way, it is not convenient for the camera 305 to inspect the surface of the circuit board 3. Therefore, by setting the diameter of the part of the fixing rod 7 below the pressing plate part 7001 to be smaller than the diameter of the screw hole 3001, and adding an airbag 207 below the pressing plate part 7001. In the initial state, the airbag 207 is in a contracted state, the airbag 207 is attached to the outside of the fixing rod 7, and there is a gap between the screw hole 3001 and the airbag 207. Thus, when the fixing rod 7 enters or is withdrawn from the screw hole 3001, the circuit board 3 is always in a static state, leaving a distance between the circuit board 3 and the camera 305, which is convenient for the camera 305 to inspect, and at the same time, it is avoided that the circuit board 3 is displaced on the limit base 9. When it is necessary to fix the circuit board 3, since when the two plug boards 204 are respectively clamped on the adjacent latching boards 5001, the second air duct 205 is synchronously inserted into the insertion port 20601 on the communicating pipe 206, keeping the second air duct 205 and the communicating pipe 206 in a communicating state. At this time, the external air supply device is controlled to deliver high-pressure gas into the air inlet 20501, so that the high-pressure gas sequentially passes through the second air duct 205, the communicating pipe 206, and the branch pipe 20602 into the cavity 7002, and then the airbag 207 is inflated until the airbag 207 is attached to the edge of the screw hole 3001 and the inner wall of the limit base 9. Thus, it is ensured that the circuit board 3 will not move laterally when it drops, and at the same time, the airbag 207 adapts and fixes the screw holes 3001 with different diameters on the circuit board 3. It should be noted here that when the clamping plate 2001 releases the fixing box 4, the second air duct 205 is disconnected from the communicating pipe 206. At this time, the self-sealing quick joint provided at the insertion port 20601 can be used to seal the communicating pipe 206, preventing the gas in the communicating pipe 206 from discharging outward, so as to ensure that the airbag 207 is in an inflated state.

[0037] On this basis, after the camera 305 below the fixing plate 304 completes the inspection of the area around the screw hole 3001, at this time, control the first driving member 203 to drive the fixing rod 7 to insert into the screw hole 3001, and then control the peripheral air supply device to inflate the airbag 207, so that the fixing rod 7 fixes the circuit board 3. Then control the first driving member 203 to drive the fixing rod 7 and the circuit board 3 to move upward, so that the circuit board 3 moves above the camera 305 on the upper side of the fixing plate 304. Subsequently, control the camera 305 to move back and forth and left and right, and inspect the lower surface of the circuit board 3 through the camera 305 on the upper side of the fixing plate 304. In this way, the upper and lower sides of the circuit board 3 will be inspected by the cooperation of the fixing rod 7 and the camera 305. After the inspection is completed, make the fixing rod 7 and the circuit board 3 return downward to the initial position, and at the same time make the camera 305 return to the initial position for the next drop test.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A circuit board load resistance testing device, comprising a base frame (1), a drive assembly and an electric clamp (2); the base frame (1) is equipped with the drive assembly; the drive assembly is connected to the electric clamp (2); two left-right symmetrical clamping plates (2001) are installed on the electric clamp (2); the characteristics are: The invention also comprises a fixing box (4), a top cover (5), a fixing assembly, a test control module (10) and a first air delivery pipe (11); the fixing box (4) for placing the circuit board (3) is clamped between two clamping plates (2001); a positioning groove (1001) is provided in the middle of the bottom frame (1); the size and shape of the positioning groove (1001) completely match the bottom profile of the fixing box (4); the top cover (5) is slidably connected to the fixing box (4); a sealed cavity (4002) is formed between the fixing box (4) and the lower side of the top cover (5); the fixing box (4) is provided with a fixing assembly; the circuit board (3) is clamped and fixed by the fixing assembly; a test control module (10) for powering on and testing the electrical load performance of the circuit board (3) is fixedly connected to the electric clamp (2); a socket (4001) is provided in the fixing box (4); the socket (4001) and the test control module (10) are connected via a control cable; the test control module (10) is connected to an external air supply device; and a first air supply pipe (11) is connected between the test control module (10) and the sealed chamber (4002).

2. A circuit board load resistance testing device according to claim 1, characterized in that: The fixing assembly comprises a first slide (6), a fixing rod (7), a second slide (8) and a limiting base (9); a plurality of first slides (6) are slidably connected to the top cover (5); each first slide (6) is slidably connected to two fixing rods (7) for fixing the circuit board (3); a plurality of second slides (8) are slidably connected to the fixing box (4); each second slide (8) is slidably connected to two limiting bases (9); each limiting base (9) is provided with a circular hole corresponding to the fixing rod (7); each first slide (6), the fixing rod (7), the second slide (8) and the limiting base (9) is provided with a locking bolt, and the sliding state can be released or limited by the locking bolt; a pressing plate portion (7001) is provided on the lower side of each fixing rod (7).

3. A circuit board load resistance testing device according to claim 1, characterized in that: The driving assembly comprises a first slide rail (201) and a first electric slider (202); the first slide rail (201) is fixedly connected to the base frame (1); the first slide rail (201) is in a vertical state; the first electric slider (202) is slidably connected to the first slide rail (201); and the first electric slider (202) is fixedly connected to the electric clamp (2).

4. A circuit board load resistance testing device according to claim 1, characterized in that: The surface of the clamping plate (2001) is covered with anti-slip rubber material.

5. A circuit board load resistance testing device according to claim 4, characterized in that: It also includes a first driving member (203) and an inserting plate (204); the two clamping plates (2001) are each fixedly connected to a first driving member (203) on the opposite sides thereof; each first driving member (203) is fixedly connected to an inserting plate (204) on the telescopic end thereof for driving the top cover (5) to move up and down; the top cover (5) is fixedly connected to two left-right symmetrical strapping plates (5001); each strapping plate (5001) is provided with a through slot corresponding to the inserting plate (204).

6. A circuit board load resistance testing device according to claim 5, characterized in that: A sealing ring for improving the sealing performance of the sealing cavity (4002) is fixedly connected to the connection surface between the fixed box (4) and the top cover (5).

7. A circuit board load resistance testing device according to claim 6, characterized in that: The fixing box (4) and the top cover (5) and their connecting parts are all made of a composite material made of carbon fiber reinforced plastic, and have good impact conduction performance, durability and insulation.

8. A circuit board load resistance testing device according to claim 7, characterized in that: The device also includes a second air supply pipe (205), a connecting pipe (206) and an air bag (207); the second air supply pipe (205) is fixedly connected to the plug plate (204) on the left side; an air inlet (20501) is provided on the second air supply pipe (205), and the air inlet (20501) is connected to an external air supply device; the connecting pipe (206) is fixedly connected to the top cover (5); one end of the connecting pipe (206) is a plug interface (20601), and the plug interface (20601) is located on the plug plate (204) on the left side. ; The other end of the connecting pipe (206) is connected to a plurality of branch pipes (20602); a self-sealing quick connector is provided at the plug interface (20601); the lower end of each fixing rod (7) is fixedly connected to an air bag (207) for improving the installation stability of the circuit board (3); each fixing rod (7) is provided with a cavity (7002); the cavity (7002) is connected to the inside of the air bag (207); the cavity (7002) in each fixing rod (7) is connected to the adjacent branch pipe (20602).

9. A circuit board load resistance testing device according to claim 3, characterized in that: The invention also comprises an inspection system, which comprises a moving component, a fixed plate (304) and a camera (305); the moving component is fixedly connected to the base frame (1); the fixed plate (304) is connected to the moving component; the fixed plate (304) is driven by the moving component to move forward and backward and left and right; and two cameras (305) are installed on the fixed plate (304) symmetrically in the upper and lower parts for inspecting surface cracks of the circuit board (3).

10. A circuit board load resistance testing device according to claim 9, characterized in that: The moving assembly comprises a second driving member (301), a second slide rail (302) and a second electric slider (303); the second driving member (301) is fixedly connected to the base frame (1), and the second driving member (301) is an electric push rod; the second slide rail (302) is fixedly connected to the telescopic end of the second driving member (301); the second electric slider (303) is slidably connected to the second slide rail (302); and the second electric slider (303) is fixedly connected to the fixing plate (304).

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