A line board measuring tool with convenient replacement

Abstract

The utility model provides a line board measuring tool frock of convenient replacement relates to line board measuring tool frock field, technical scheme is: including detection bench box, be provided with upper bracket and lower bracket in detection bench box, be provided with opening on upper bracket and lower bracket, be provided with placing subassembly on opening, be provided with cam groove on two side walls in detection bench box respectively, including detection bench box, detection bench box is provided with upper bracket and lower bracket, is detected alternately through two path settings, the beneficial effects of this technical scheme are: through the setting of first drive subassembly, upper bracket and lower bracket, the line board on one bracket can place line board on the other bracket when detecting, the staff has sufficient time to replace the line board, it is convenient for staff's replacement, improves the replacement efficiency simultaneously, and the setting of upper bracket and lower bracket, it is convenient for staff to take and place line board, guarantees the accuracy of test.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, and in particular to a circuit board testing fixture that is easy to replace. Background Technology

[0002] With the rapid development of technology in the field of electronic products, people's consumption demand for electronic products is constantly increasing. After the market supply exceeds demand, consumers have higher and higher requirements for the quality of electronic products. This requires electronic product manufacturers to improve production efficiency and pass rate in order to occupy a larger consumer market. One of the most basic components of smart appliances is the circuit board, and the quality of the circuit board will affect the lifespan and quality of electronic products.

[0003] After circuit board production, a series of tests are typically performed to ensure that all connected traces are conductive and that disconnected traces are insulated. The circuit board is placed on a test rack, and probes on the rack simultaneously contact all test points on the board, completing all continuity and insulation tests in one go. Currently, the testing sequence for circuit boards is as follows: first, the circuit board to be tested is placed on the test rack; then, the top plate moves downwards, pushing the circuit board into contact with the probes; after the test is completed, the top plate moves upwards, and the operator removes the circuit board before placing a new one.

[0004] To ensure the stability and accuracy of testing, the fixture must firmly fix the circuit board in a precise position. This requires additional time for adjustment when replacing the circuit board, prolonging the time spent on each operation and reducing overall work efficiency. When staff are in a hurry to replace the circuit board, it can lead to misalignment, inaccurate test results, and in severe cases, damage to the circuit board. In addition, current test fixtures only have one workstation, and staff have to wait for the equipment to start while the circuit board is being tested, which cannot make full use of the time. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of current circuit board testing, such as the long time and low work efficiency of replacing circuit boards, and to propose a convenient circuit board replacement testing fixture.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A replaceable circuit board testing fixture includes a testing platform housing. The testing platform housing contains an upper bracket and a lower bracket, both with openings for mounting components. Cam grooves are provided on two side walls of the testing platform housing, each housing a first slider. Guide posts are connected to both sides of the lower surface of the lower bracket. A base plate is located below the lower bracket. The lower ends of the guide posts pass through the base plate and extend below it. The first slider is fixed to the lower ends of the guide posts. A sliding component is slidably connected to the base plate. The lifting column has its upper end fixed to the lower surface of the lower bracket. The two side walls of the testing platform housing are each connected to a lower slot. The opposing sides of the two base plates are slidably connected to the lower slots. A base is slidably connected inside the testing platform housing, with its upper end connected to the lower surface of the upper bracket. The lower slots are located above the cam groove. A first drive assembly is installed inside the testing platform housing, connected to both the base plate and the base. A testing module is installed on the side wall of the testing platform housing, corresponding to the upper and lower brackets.

[0007] The lower bracket moves along the cam groove, while the upper bracket moves along the upper straight groove. The cam groove is located below the upper straight groove. This design ensures that the reciprocating motion of the lower bracket does not interfere with the reciprocating motion of the upper bracket, allowing the upper and lower brackets to be inspected separately. During inspection, circuit boards can be placed and removed from the other bracket, giving workers ample time to handle them. This facilitates circuit board replacement, shortens working time, and improves work efficiency.

[0008] Preferably, the first drive assembly includes belt drive pulleys disposed on two side walls of the testing platform housing. A first synchronous pulley and a second synchronous pulley are disposed on each side wall of the testing platform housing. A connecting box is disposed above the testing platform housing, with its bottom connected to the top of the testing platform housing. The first and second synchronous pulleys are located on the upper and lower sides of the belt drive pulleys. A fifth synchronous pulley is disposed on each side wall of the connecting box. A third and fourth synchronous pulleys are disposed on each side wall of the testing platform housing. A first synchronous belt is wound around the third, fifth, fourth, and second synchronous pulleys. The first synchronous belt is connected to the base plate and the base plate, respectively. A second drive assembly is disposed inside the connecting box, and the second drive assembly is connected to the fifth synchronous pulleys.

[0009] By setting the first drive component, the lower bracket and the upper bracket are controlled to move in opposite directions, which makes it convenient for staff to pick up and put down the circuit board. At the same time, the first drive component can control the rotation of the second drive component.

[0010] Preferably, the second drive assembly includes a second drive wheel shaft rotatably connected to two side walls inside the connecting box, a fifth synchronous belt pulley fixed to one end of the second drive wheel shaft, a top plate conveyor belt drive wheel fixedly connected to the end of the second drive wheel shaft away from the fifth synchronous belt pulley, a top plate conveyor belt driven wheel installed on the side wall inside the connecting box, a second synchronous belt wound together on the top plate conveyor belt drive wheel and the top plate conveyor belt driven wheel, and a top plate connecting plate slidably connected inside the detection table box, the top plate connecting plate being connected to the second synchronous belt.

[0011] The second drive assembly, designed with radii calculated according to formulas for the top plate conveyor belt drive wheel and the top plate conveyor belt driven wheel, allows the top plate to simultaneously reach the detection position above the detection module when the upper or lower bracket reaches it. This squeezes the circuit board, ensuring that the circuit board contacts the probe below for rapid detection. This ensures the integrity of the mechanism and guarantees that it can complete the circuit board detection.

[0012] Preferably, lifting vertical plates are fixedly connected to both sides of the lower surface of the top plate connecting plate, and a third slider is fixedly connected to one side of the lifting vertical plate. Lifting vertical slots for the top plate are connected to the two side walls of the testing platform housing, and the third slider is installed in the lifting vertical slots. Lifting plate bearing vertical plates are fixedly connected to both sides of the lower surface of the top plate connecting plate, and a sliding groove is provided on one side of the lifting plate bearing vertical plate. A fifth slider is installed in the sliding groove, and a top plate moving shaft is connected to the fifth slider. A top plate moving block is fixedly connected to the middle of the top plate moving shaft, and the top plate moving block is fixed to the second synchronous belt. A sixth slider is rotatably connected to one end of the top plate moving shaft. Elliptical grooves are connected to the two side walls of the testing platform housing, and the sixth slider is installed in the elliptical grooves. A top plate is fixedly connected to the lower surface of the top plate connecting plate, and multiple fixture pressure bars are fixedly connected to the lower surface of the top plate.

[0013] The fixture pressure bar is equipped with a buffer pad to protect the circuit board. The elliptical groove design ensures the movement trajectory of the top plate moving shaft. The design of the lifting plate bearing vertical plate and the top plate lifting straight groove ensures that the top plate only moves up and down, thereby ensuring the integrity of the entire circuit board testing fixture.

[0014] Preferably, a motor mounting plate is installed on the side wall of the test bench housing, a motor is mounted on the motor mounting plate, a first bevel gear is mounted on the output shaft of the motor, a first drive wheel shaft is rotatably connected to the two side walls of the test bench housing, a second bevel gear is fixedly connected to the middle of the first drive wheel shaft, the tooth surfaces of the second bevel gear and the first bevel gear mesh with each other, and two belt drive pulleys are respectively fixed at both ends of the first drive wheel shaft.

[0015] With the above settings, the motor simultaneously drives two belt drive pulleys to provide power for the entire circuit board testing fixture, making the first synchronous belt run more stably.

[0016] Preferably, a detection module support plate is installed on the side wall of the detection stage housing, the lower end of the detection module is fixed to the upper surface of the detection module support plate, a needle plate is installed on the upper surface of the detection module, a probe is installed on the upper surface of the needle plate, and the probe is located below the fixture pressure bar.

[0017] The probe, the circuit board at the detection position, and the fixture pressure bar are positioned correspondingly to ensure the circuit board can be tested.

[0018] Preferably, the placement component includes a float plate slidably connected to the upper end of the opening, a plurality of springs fixedly connected to the lower surface of the float plate, a spring support plate fixedly connected to the lower surface of the springs, and the spring support plate fixedly located below the opening.

[0019] The springs allow the float to move up and down, thereby relieving the pressure load on the circuit board and protecting it. The open sidewalls on the upper and lower brackets have the function of limiting the circuit board, making it convenient for staff to place.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: With the arrangement of the first drive assembly, upper bracket, and lower bracket, while a circuit board on one bracket is being tested, another circuit board can be placed on the other bracket, giving the operator ample time to replace the circuit board, thus facilitating replacement and improving efficiency. Furthermore, with the placement assembly, the operator only needs to place the circuit board on the floating plate, allowing it to abut against the side wall of the opening, facilitating easy placement and removal of the circuit board and ensuring testing accuracy. The cooperation between the second drive assembly and the first drive assembly is also significant. When the first drive assembly controls a circuit board to move below the top plate, the second drive assembly controls the top plate to move downwards, pressing the top plate against the top of the circuit board, ensuring complete contact between the circuit board and the probe below, guaranteeing testing accuracy. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the structure inside the testing platform box in a specific embodiment of this utility model.

[0024] Figure 3 This is a schematic diagram of the internal structure in a specific embodiment of the present utility model.

[0025] Figure 4 This is a schematic diagram of the lower bracket in a specific embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure for placing the components in a specific embodiment of this utility model.

[0027] Figure 6 This is a schematic diagram of the structure of the first driving component in a specific embodiment of this utility model.

[0028] Figure 7 This is a structural schematic diagram of the top plate component in a specific embodiment of this utility model.

[0029] In the diagram: 1. Testing platform housing; 101. Cam groove; 102. First drive wheel shaft; 103. Lower slot; 104. Upper straight slot; 105. Elliptical groove; 106. Top plate lifting straight slot; 107. Second drive wheel shaft; 2. Power button; 3. Upper bracket; 301. Spring support plate; 302. Spring; 303. Floating plate; 4. Middle cover plate; 5. Testing module; 501. Testing module support plate; 6. Lower bracket; 7. Top plate; 8. Top plate connecting plate; 801. Third slider; 802. Lifting vertical plate; 803. Lifting plate bearing vertical plate; 804. Top plate moving block; 8 05. Top plate moving shaft; 9. Motor; 901. First bevel gear; 902. Second bevel gear; 903. Belt drive pulley; 10. First synchronous belt; 1001. Third synchronous belt pulley; 1002. Fifth synchronous belt pulley; 1003. Fourth synchronous belt pulley; 1004. Second synchronous belt pulley; 1005. First synchronous belt pulley; 11. Second synchronous belt; 1101. Top plate conveyor belt drive wheel; 1102. Top plate conveyor belt driven wheel; 12. Second slider; 13. Base; 14. First slider; 15. Base plate; 16. Guide sleeve; 17. Guide column; 18. Lifting column. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0031] Reference Figures 1-7The system includes a testing platform housing 1, with a central cover plate 4 and a power button 2. Turning on the power button 2 powers on the entire device. The power button 2 is electrically connected to a motor 9, controlling the start of the motor 9. Indicator lights are located on the testing platform housing 1 and are electrically connected to a testing module 5. The testing module 5 provides feedback on whether the circuit board has a problem via the indicator lights. Inside the testing platform housing 1 are an upper bracket 3 and a lower bracket 6, both with openings. Placement components are installed in these openings to hold the circuit board to be tested. The sidewalls of the openings also limit the movement of the circuit board, facilitating easy placement and replacement by operators. Cam grooves 101 are respectively provided on the two side walls of the testing platform housing 1. A first slider 14 is installed in the cam groove 101 and slides in the cam groove 101. The cam groove 101 consists of three horizontal grooves connected by inclined grooves. When the first slider 14 slides in the cam groove 101, it will slide into another horizontal groove due to the action of the inclined groove. At this time, the first slider 14 will drive the guide column 17 to move up and down. In this way, when the lower bracket 6 moves, the setting of the cam groove 101 can avoid interference between the lower bracket 6 and the upper bracket 3. At the same time, the setting of the lower bracket 6 and the upper bracket 3 allows the operator to place the wire on the other bracket in advance when one bracket is located above the testing module 5 for testing. Circuit boards are inspected to improve inspection efficiency and facilitate replacement by staff. Guide posts 17 are connected to both sides of the lower surface of the lower bracket 6. A base plate 15 is located below the lower bracket 6. The lower ends of the guide posts 17 pass through the base plate 15 and extend below it. The first slider 14 is fixed to the lower end of the guide post 17. Lifting posts 18 are slidably connected to the base plate 15. The upper ends of the lifting posts 18 are fixed to the lower surface of the lower bracket 6. Two or four lifting posts 18 are provided to ensure the lower bracket 6 moves vertically up and down. Corresponding guide sleeves 16 are provided on the base plate 15 to limit the movement of the lifting posts 18, ensuring their vertical movement. The lifting posts 18 allow for more stable up and down movement of the lower bracket 6. The inspection table housing 1 contains... Both side walls of the test stage 1 are connected to lower slots 103. The opposite sides of the two base plates 15 are slidably connected to the lower slots 103. The base plates 15 can slide within the lower slots 103. A fourth slider is provided within the lower slots 103, and the fourth slider is connected to the side wall of the base plate 15. The lower slots 103 also provide support for the base plates 15, facilitating the first drive assembly to control the sliding of the base plates 15. A base 13 is slidably connected inside the test stage housing 1, and a second slider 12 is installed on the base 13. Upper straight slots 104 are provided on the two side walls of the test stage housing 1. The second slider 12 slides within the upper straight slots 104, thereby facilitating the base 13 to drive the upper bracket 3 to slide together. The upper end of the base 13 is connected to the lower surface of the upper bracket 3.Meanwhile, the second slider 12 supports the entire base 13. The lower slot 103 is located above the cam slot 101. A first drive assembly is installed inside the testing platform housing 1, connected to both the base plate 15 and the base 13. A testing module 5 is installed on the side wall of the testing platform housing 1, corresponding to the upper bracket 3 and the lower bracket 6. The first drive assembly can simultaneously control the sliding of both the upper bracket 3 and the lower bracket 6. Thus, when one bracket is being tested above the testing module 5, the circuit board to be tested can be placed on the other bracket.

[0032] After the circuit board is placed on the upper bracket 3, the power button 2 is pressed, and the motor 9 connected to it starts. The motor 9 drives the belt drive wheel 903 to rotate, thereby driving the first synchronous belt 10 wound on it to move. The first synchronous belt 10 drives the base 13 and the base plate 15 fixedly connected to it to move in opposite directions. The base 13 drives the second slider 12 and the upper bracket 3 fixedly connected to it to move. The second slider 12 moves along the upper straight groove 104. The base plate 15 drives the lower bracket 6 to move through the first slider 14 and the guide post 17. Since the first slider 14 moves along the cam groove 101, it restricts the lower bracket 6 from moving along the trajectory of the cam groove 101. When the upper bracket 3 and the lower bracket 6 move to the middle position of their strokes, the lower bracket 6 will move downward along the cam groove 101, thereby avoiding interference between the upper bracket 3 and the lower bracket 6 during movement. This achieves the effect of one testing cabinet 1 continuously testing two circuit boards, which facilitates the replacement of circuit boards and greatly improves work efficiency.

[0033] Reference Figures 1-6The first drive assembly includes belt drive pulleys 903 mounted on two side walls of the testing platform housing 1. A first synchronous pulley 1005 and a second synchronous pulley 1004 are mounted on each side wall of the testing platform housing 1. A connecting box is mounted above the testing platform housing 1, with its bottom connected to the top of the testing platform housing 1. The connecting box is fixed to the top of the testing platform housing 1. The first synchronous pulleys 1005 and 1004 are located above and below the belt drive pulleys 903. A fifth synchronous pulley 1002 is mounted on each side wall of the connecting box. A third synchronous pulley 1001 and a fourth synchronous pulley 1003 are mounted on each side wall of the testing platform housing 1. The third and fourth synchronous pulleys 1001 and 1003 are located below the fifth synchronous pulley 1002, and the fifth synchronous pulley 1002 is located above the third synchronous pulley 1001. The belt drive pulleys 903 and 904 are mounted on the top walls of the testing platform housing 1. 3. A first synchronous belt 10 is wound around the first synchronous pulley 1005, the third synchronous pulley 1001, the fifth synchronous pulley 1002, the fourth synchronous pulley 1003, and the second synchronous pulley 1004. The teeth on the synchronous pulleys mesh with the teeth on the synchronous belt, thus ensuring accurate movement of the synchronous belt. The first synchronous belt 10 is connected to the base plate 15 and the base 13 respectively. The base plate 15 and the base 13 are fixed to the first synchronous belt 10 with bolts. At the same time, clamping components can be set on the base plate 15 and the base 13. The clamping components clamp on both sides of the first synchronous belt 10, thus fixing the base plate 15 and the base 13 to the first synchronous belt 10. When the first synchronous belt 10 moves, it drives the base plate 15 and the base 13 to move, ensuring accurate movement of the base plate 15 and the base 13. A second drive component is set in the connecting box, and the second drive component is connected to the fifth synchronous pulley 1002.

[0034] In operation, the belt drive pulley 903 is first rotated, causing the first synchronous belt 10 wound around it to move. The first synchronous belt 10 drives the first synchronous pulley 1005, the third synchronous pulley 1001, the fifth synchronous pulley 1002, the fourth synchronous pulley 1003, and the second synchronous pulley 1004 wound around it to rotate. The third synchronous pulley 1001 and the first synchronous pulley 1005 are on the same horizontal line, as are the fourth synchronous pulley 1003 and the second synchronous pulley 1004. The third synchronous pulley 1001 and the first synchronous pulley 1005 are above the fourth synchronous pulley 1003 and the second synchronous pulley 1004, and below the fifth synchronous pulley 1002. The second synchronous pulley 1004 and the first synchronous pulley 1005 are located on the side closer to the belt drive pulley 903. The third synchronous pulley 1001, the fifth synchronous pulley 1002, and the fourth synchronous pulley 1003 are located on the side close to the detection module 5. The belt drive wheel 903, the first synchronous pulley 1005, the third synchronous pulley 1001, the fifth synchronous pulley 1002, the fourth synchronous pulley 1003, and the second synchronous pulley 1004 have the same radius. With this setting, the belt drive wheel 903 can drive the first synchronous pulley 1005, the third synchronous pulley 1001, the fifth synchronous pulley 1002, the fourth synchronous pulley 1003, and the second synchronous pulley 1004 to rotate, thereby driving the upper bracket 3 between the third synchronous pulley 1001 and the first synchronous pulley 1005 and the lower bracket 6 between the fourth synchronous pulley 1003 and the second synchronous pulley 1004 to move, thereby driving the circuit board to achieve reciprocating motion, which facilitates the replacement of the circuit board and improves work efficiency.

[0035] Reference Figure 2 , Figure 3 , Figure 6 and Figure 7The second drive assembly includes a second drive wheel shaft 107 rotatably connected to two side walls inside the connecting box. A fifth synchronous pulley 1002 is fixed to one end of the second drive wheel shaft 107. A ceiling conveyor belt drive wheel 1101 is fixedly connected to the end of the second drive wheel shaft 107 away from the fifth synchronous pulley 1002. When the first synchronous belt 10 rotates, it will drive the fifth synchronous pulley 1002 to rotate together. Under the action of the second drive wheel shaft 107, the fifth synchronous pulley 1002 rotates together, and the second drive wheel shaft 107 thereby drives the ceiling conveyor belt drive wheel 1101 to rotate together. The top plate conveyor belt drive wheel 1101 drives the second synchronous belt 11 to rotate together. A driven wheel 1102 is installed on the side wall of the connecting box. The second synchronous belt 11 is wound around both the top plate conveyor belt drive wheel 1101 and the driven wheel 1102. A top plate connecting plate 8 is slidably connected inside the testing platform housing 1. The top plate connecting plate 8 is connected to the second synchronous belt 11, and the second synchronous belt 11 drives the top plate connecting plate 8 to move together. The distance from the initial position of the upper bracket 3 where the circuit board is placed to the position above the testing module 5 is L1. The distance from the top plate conveyor belt drive wheel 1101 to the top plate conveyor belt driven wheel 1102 plus half the circumference of the top plate conveyor belt drive wheel 1101 is L2. The radius of the top plate conveyor belt drive wheel 1101 is r2. The radius of the fifth synchronous belt pulley 1002 is r1. The radius of the top plate conveyor belt drive wheel 1101 is equal to L2 multiplied by the radius of the fifth synchronous belt pulley 1002 divided by L1, which is: This ensures that when the upper bracket 3 or the lower bracket 6 moves from its initial position to the detection module 5 for detection, the second synchronous belt 11 drives the top plate connecting plate 8 to rise and fall from the bottom first when the other bracket returns. The top plate connecting plate 8 separates the circuit boards. Then, when the circuit board to be detected is located on the detection module 5, the top plate connecting plate 8 moves from top to bottom to limit the circuit board located above the detection module 5.

[0036] When the belt drive pulley 903 rotates, it drives the first synchronous belt 10 wound on it to rotate, thereby driving the fifth synchronous pulley 1002 to rotate. The fifth synchronous pulley 1002 drives the second drive wheel shaft 107 fixedly connected to it to rotate, which in turn drives the top plate conveyor belt drive pulley 1101 fixedly connected to the other end of the second drive wheel shaft 107 to rotate. The top plate conveyor belt drive pulley 1101 drives the second synchronous belt 11 wound on it to move, which in turn drives the top plate moving block 804 fixedly connected to the second synchronous belt 11 to move. The top plate moving block 804 drives the top plate connecting plate 8 to move, thereby driving the top plate 7 to move. By setting the radii of the top plate conveyor belt drive wheel 1101 and the fifth synchronous belt pulley 1002, the top plate 7 can move along the elliptical groove 105 once as the upper bracket 3 moves from the initial position where the circuit board is placed to the position above the detection module 5, or the lower bracket 6 moves from the position above the detection module 5 to the position where the circuit board is placed. That is, the top plate 7 moves from the detection position to the highest point and then back to the detection position. The top plate 7 can then detect the upper bracket 3 or the lower bracket 6 at the detection position. With this setting, the first drive component can provide power to the second drive component. That is, the entire device only needs one motor 9 to realize all movements, reducing the number of motors, saving costs, making the mechanism simpler, and improving the working effect.

[0037] Reference Figure 2 , Figure 3 and Figure 7 Both sides of the lower surface of the top plate connecting plate 8 are fixedly connected to lifting vertical plates 802. A third slider 801 is fixedly connected to one side of the lifting vertical plates 802. The two side walls inside the test bench housing 1 are respectively connected to the top plate lifting vertical slots 106. The third slider 801 is installed in the top plate lifting vertical slots 106. The third slider 801 drives the top plate connecting plate 8 to move vertically up and down. Both sides of the lower surface of the top plate connecting plate 8 are fixedly connected to lifting plate bearing vertical plates 803. A sliding groove is provided on one side of the lifting plate bearing vertical plate 803. A fifth slider is installed in the sliding groove. The top plate moving shaft 805 is connected to the fifth slider. The top plate moving block 804 is fixedly connected to the middle of the top plate moving shaft 805. The top plate moving block 804 communicates with the second synchronous belt 11. The top plate moving block 804 is fixed to the second synchronous belt 11, either by bolts or by connecting it to the base plate 15, base 13 and the first synchronous belt 10 in the same way. One end of the top plate moving shaft 805 is rotatably connected to the sixth slider. Elliptical grooves 105 are connected to the two side walls inside the test bench housing 1, and the sixth slider is installed in the elliptical grooves 105. When the top plate moving block 804 rotates together with the second synchronous belt 11, the top plate moving block 804 moves left and right in the sliding groove on the lifting plate bearing vertical plate 803. The bottom surface of the top plate connecting plate 8 is fixedly connected to the top plate 7, and the bottom surface of the top plate 7 is fixedly connected to multiple fixture pressure bars. The fixture pressure bars limit and fix the circuit board to be tested to avoid inaccurate testing position.

[0038] The second synchronous belt 11 drives the top plate moving block 804 to move. The top plate moving block 804 drives the fifth and sixth sliders to move together through the top plate moving shaft 805. In this way, the fifth slider drives the lifting plate bearing vertical plate 803 to move. The lifting plate bearing vertical plate 803 drives the top plate connecting plate 8 to move. The top plate connecting plate 8 drives the top plate 7, which is fixedly connected to its lower surface, to move. Two connection ports are provided on the side wall of the connecting box. The connecting end of the top plate connecting plate 8 passes through the connection port and connects with the top plate 7, thereby driving the fixture pressure bar to press down the circuit board on the placed component and make it contact the probe on the detection module 5, thereby completing the detection. The sixth slider at the other end of the top plate moving shaft 805 moves along the elliptical groove 105, thereby driving the fifth slider to move. The fifth slider can restrict vertical movement within the sliding groove but not horizontal movement, thus enabling the fifth slider to drive the lifting plate bearing vertical plate 803 to move vertically, and then drive the top plate connecting plate 8, which is fixedly connected to the upper surface of the lifting plate bearing vertical plate 803, to move vertically. The fifth and sixth sliders can make the movement of the top plate moving shaft 805 smoother. The third slider 801, which is fixedly connected to the lifting vertical plate 802, can slide within the top plate lifting straight groove 106, which can reduce the motion load borne by the fifth slider, the sixth slider, and the top plate moving shaft 805, and extend the service life of the test bench housing 1. The design of the second synchronous belt 11 and the top plate moving block 804 can make the top plate enter and exit the lowest position more smoothly, and make the circuit board test results more reliable.

[0039] refer to Figures 2-3 A motor mounting plate is installed on the side wall inside the test bench housing 1. A motor 9 is mounted on the motor mounting plate. A first bevel gear 901 is mounted on the output shaft of the motor 9. A first drive wheel shaft 102 is rotatably connected to the two side walls inside the test bench housing 1. A second bevel gear 902 is fixedly connected to the middle of the first drive wheel shaft 102. The teeth of the second bevel gear 902 and the first bevel gear 901 mesh with each other. Two belt drive pulleys 903 are respectively fixed at both ends of the first drive wheel shaft 102. When the motor 9 rotates, the first bevel gear 901 drives the second bevel gear 902 to rotate together, thereby controlling the rotation of the first drive wheel shaft 102. The first drive wheel shaft 102 simultaneously controls the two belt drive pulleys 903 to rotate together, thereby driving the two first synchronous belts 10 to rotate.

[0040] When motor 9 starts, it drives the first bevel gear 901 fixedly connected to its output shaft to rotate. The first bevel gear 901 drives the second bevel gear 902 meshing with it to rotate. The second bevel gear 902 drives the first drive wheel shaft 102 fixedly connected to its center to rotate. The first drive wheel shaft 102 drives the belt drive pulleys 903 fixedly connected at both ends to rotate, thereby driving the entire mechanism to run. The entire mechanism is simple and reliable in design. The design of the double-sided drive wheels can make the entire mechanism run more stably. When a bracket moves from the initial position to above the detection module 5, after the detection is completed, motor 9 reverses to move the bracket back to the initial position.

[0041] refer to Figure 3 A detection module support plate 501 is installed on the side wall inside the detection platform housing 1. The lower end of the detection module 5 is fixed to the upper surface of the detection module support plate 501. A needle plate is installed on the upper surface of the detection module 5, and a probe is installed on the upper surface of the needle plate. The probe is located below the fixture pressure bar. When the placement component moves to the position above the detection module 5, the top plate 7 moves to the lowest point of the elliptical groove 105. At this time, the probe and the circuit board contact and are detected under the action of the fixture pressure bar on the lower surface of the top plate 7. The detection result is displayed by the indicator light fixed on the upper surface of the detection platform housing 1.

[0042] refer to Figure 5 The placement assembly includes a float 303 slidably connected in the opening. Multiple springs 302 are fixedly connected to the lower surface of the float 303, and spring support plates 301 are fixedly connected to the lower surfaces of the springs 302, located on the sidewalls of the opening. When the circuit board is placed on the upper surface of the float 303, the sidewalls of the openings on the upper support 3 and lower support 6 restrict the position of the circuit board, thus fixing it in place. When the upper support 3 or lower support 6 moves above the detection module 5, the fixture pressure bar on the lower surface of the top plate 7 contacts the circuit board and the probes on the upper surface of the pin plate fixed to the upper surface of the detection module 5, thereby detecting the circuit board. The springs 302 allow the float 303 to move up and down, thereby relieving the pressure load on the circuit board and protecting it.

[0043] Initially, the upper bracket 3 is in the placement position. The operator first places the circuit board on the upper bracket 3, while the lower bracket 6 is in the detection position. After placement, the motor 9 on the detection platform housing 1 is started. The motor 9 controls the rotation of the first drive wheel shaft 102 through the first bevel gear 901 and the second bevel gear 902. The first drive wheel shaft 102 drives the two belt drive pulleys 903 to rotate together, thereby controlling the first synchronous belt 10 to rotate together. This controls the upper bracket 3 and the lower bracket 6 to move in opposite directions, driving the upper bracket 3 to move horizontally towards the detection module 5. At the same time, the lower bracket 6 leaves the detection position and moves towards the motor 9. The top plate 7 also begins its up-and-down reciprocating motion. When the upper bracket 3 reaches the middle of its travel, the lower bracket 6 passes under it. Due to the setting of the cam groove 101, interference between the two is avoided. When the upper bracket 3 reaches directly above the detection module 5, the top plate 7 moves synchronously to the lowest point, stably pressing the circuit board onto the probe of the detection module 5, and the test begins. During this process, the second synchronous belt 11 in the second drive assembly and the top plate moving block 804 ensure the verticality and smoothness of the pressing action, greatly guaranteeing the contact reliability and consistency of the test. After the test is completed, the motor 9 automatically stops. At this time, the lower bracket 6 has moved to a convenient placement position for loading the next circuit board. After completion, it restarts, the motor 9 reverses, and the system enters a reverse working cycle: the lower bracket 6 carries the new board to the test position, the upper bracket 3 synchronously retracts, and the top plate 7 performs the pressing test again. The two also cross each other in the middle of the stroke without interfering with each other, completing the test of the second board. Through the precision mechanical synchronization driven by a single motor 9, seamless connection of loading, conveying, and testing at the upper and lower workstations is achieved, forming an efficient, reliable, and space-saving automated testing system.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit board testing fixture that is easy to replace, characterized in that: The test bench includes a test bench housing (1), which contains an upper bracket (3) and a lower bracket (6). Both the upper bracket (3) and the lower bracket (6) have openings, on which are placed components. Cam grooves (101) are provided on the two side walls inside the test bench housing (1). A first slider (14) is installed in the cam grooves (101). Guide columns (17) are connected to both sides of the lower surface of the lower bracket (6). A base plate (15) is provided below the lower bracket (6). The lower end of the guide column (17) passes through the base plate (15) and extends to the bottom of the base plate (15). The first slider (14) is fixed to the lower end of the guide column (17). A lifting column (18) is slidably connected to the base plate (15). The upper end of the column (18) is fixed to the lower surface of the lower bracket (6). The two side walls of the test bench box (1) are connected to the lower slots (103). The opposite sides of the two base plates (15) are slidably connected to the lower slots (103). The base (13) is slidably connected to the test bench box (1). The upper end of the base (13) is connected to the lower surface of the upper bracket (3). The lower slot (103) is located above the cam groove (101). The test bench box (1) is provided with a first drive assembly. The first drive assembly is connected to the base plate (15) and the base (13) respectively. The test module (5) is installed on the side wall of the test bench box (1). The test module (5) is correspondingly set with the upper bracket (3) and the lower bracket (6).

2. The easily replaceable circuit board testing fixture according to claim 1, characterized in that: The first drive assembly includes belt drive pulleys (903) mounted on two side walls of the test bench housing (1). A first synchronous pulley (1005) and a second synchronous pulley (1004) are mounted on each side wall of the test bench housing (1). A connecting box is mounted above the test bench housing (1), with its bottom connected to the top of the test bench housing (1). The first synchronous pulley (1005) and the second synchronous pulley (1004) are located on the upper and lower sides of the belt drive pulleys (903). A fifth synchronous pulley (1002) is mounted on each side wall of the connecting box, and a third synchronous pulley (1004) is mounted on each side wall of the test bench housing (1). The first synchronous belt (10) is wound around the belt drive pulley (903), the first synchronous belt pulley (1005), the third synchronous belt pulley (1001), the fifth synchronous belt pulley (1002), the fourth synchronous belt pulley (1003), and the second synchronous belt pulley (1004). The first synchronous belt (10) is connected to the base plate (15) and the base (13) respectively. The second drive assembly is provided in the connecting box and is connected to the fifth synchronous belt pulley (1002).

3. The easily replaceable circuit board testing fixture according to claim 2, characterized in that: The second drive assembly includes a second drive wheel shaft (107) rotatably connected to two side walls inside the connecting box. A fifth synchronous belt pulley (1002) is fixed to one end of the second drive wheel shaft (107). A top plate conveyor belt drive wheel (1101) is fixedly connected to the end of the second drive wheel shaft (107) away from the fifth synchronous belt pulley (1002). A top plate conveyor belt driven wheel (1102) is installed on the side wall inside the connecting box. A second synchronous belt (11) is wound together on the top plate conveyor belt drive wheel (1101) and the top plate conveyor belt driven wheel (1102). A top plate connecting plate (8) is slidably connected inside the detection table box (1). The top plate connecting plate (8) is connected to the second synchronous belt (11).

4. The easily replaceable circuit board testing fixture according to claim 3, characterized in that: Lifting vertical plates (802) are fixedly connected to both sides of the lower surface of the top plate connecting plate (8). A third slider (801) is fixedly connected to one side of the lifting vertical plate (802). The two side walls inside the test bench box (1) are respectively connected to the lifting vertical slots (106) of the top plate. The third slider (801) is installed in the lifting vertical slots (106) of the top plate. Lifting plate bearing vertical plates (803) are fixedly connected to both sides of the lower surface of the top plate connecting plate (8). A sliding groove is provided on one side of the lifting plate bearing vertical plate (803). A fifth slider is installed in the sliding groove. The fifth slider is connected to the top plate moving shaft (805), the top plate moving shaft (805) is fixedly connected to the middle of the top plate moving block (804), the top plate moving block (804) is fixed on the second synchronous belt (11), the top plate moving shaft (805) is rotatably connected to the sixth slider, the two side walls inside the test bench box (1) are respectively connected to the elliptical groove (105), the sixth slider is installed in the elliptical groove (105), the bottom surface of the top plate connecting plate (8) is fixedly connected to the top plate (7), and the bottom surface of the top plate (7) is fixedly connected to multiple fixture pressure bars.

5. The easily replaceable circuit board testing fixture according to claim 2, characterized in that: A motor mounting plate is installed on the side wall inside the test bench housing (1), and a motor (9) is installed on the motor mounting plate. A first bevel gear (901) is installed on the output shaft of the motor (9). A first drive wheel shaft (102) is rotatably connected to the two side walls inside the test bench housing (1). A second bevel gear (902) is fixedly connected to the middle of the first drive wheel shaft (102). The tooth surfaces of the second bevel gear (902) and the first bevel gear (901) mesh with each other. Two belt drive pulleys (903) are fixed at both ends of the first drive wheel shaft (102).

6. The easily replaceable circuit board testing fixture according to claim 1, characterized in that: A detection module support plate (501) is installed on the side wall inside the detection platform box (1). The lower end of the detection module (5) is fixed on the upper surface of the detection module support plate (501). A needle plate is installed on the upper surface of the detection module (5). A probe is installed on the upper surface of the needle plate. The probe is located below the fixture pressure bar.

7. The easily replaceable circuit board testing fixture according to claim 1, characterized in that: The placement component includes a float plate (303) slidably connected to the upper end of the opening, a plurality of springs (302) fixedly connected to the lower surface of the float plate (303), a spring support plate (301) fixedly connected to the lower surface of the springs (302), and the spring support plate (301) fixedly located below the opening.

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