A circuit board false soldering detection tool with a bottom mold quick switching function

Abstract

The application discloses a circuit board virtual welding detection tool with a bottom mold quick switching function, and relates to the technical field of circuit board detection. The application discloses a circuit board virtual welding detection tool with a bottom mold quick switching function, and relates to the technical field of circuit board detection. The inside of the rack is also provided with a bearing module, the cooperation of the positioning rod and the positioning groove realizes the quick positioning of the bottom mold, the positioning rod is divided into a conical section and a cylindrical section from top to bottom, the positioning groove is correspondingly divided into a columnar groove and a horn-shaped groove, wherein the top diameter of the conical section is small, and the bottom diameter of the horn-shaped groove is large, the structure design can effectively reduce the alignment difficulty, even if a small deviation occurs during positioning, the positioning rod can also be quickly guided to be inserted into the inside of the positioning groove; with the falling of the bottom mold, the cylindrical section of the positioning rod is embedded into the columnar groove of the positioning groove, the positioning of the bottom mold is completed and the movement of the bottom mold is limited, and the quick positioning switching module is matched, so that the quick butt joint and positioning of the bottom mold can be realized without an additional adjusting mechanism.

Description

Technical Field

[0001] This invention belongs to the field of circuit board testing technology, specifically a circuit board solder joint detection fixture with a quick bottom mold switching function. Background Technology

[0002] In the circuit board (PCB) manufacturing process, solder joint detection is a crucial step in ensuring product quality. This typically requires specialized testing fixtures to inspect the continuity and reliability of electrical connections. Existing PCB testing fixtures often include a support mold for positioning the PCB. This mold must be compatible with the PCB specifications. However, in actual production, there is a need to alternately test various PCB specifications. Therefore, the efficiency of mold switching and the positioning accuracy directly affect the overall testing efficiency and quality. There is an urgent need for a testing fixture capable of rapid mold switching and precise positioning to meet the demands of industrial-scale batch testing.

[0003] However, existing circuit board solder joint detection fixtures mainly use two methods for installing the bottom mold. One method is to fix the bottom mold with bolts, which requires manual tightening and loosening of bolts repeatedly. This method is cumbersome and time-consuming, and problems such as stripping and positioning deviation are prone to occur during bolt installation and removal, further slowing down the changeover speed. The other method is to use positioning grooves and positioning pins to achieve bottom mold positioning. However, existing positioning grooves and positioning pins are mostly straight-walled structures without guide structures, resulting in extremely low alignment tolerance. Even slight deviations can cause the positioning pins to fail to quickly insert into the positioning groove, requiring repeated manual calibration and alignment. After positioning, an additional fixing step is required to prevent the bottom mold from shifting. Both methods are cumbersome and time-consuming, ultimately leading to a slow bottom mold changeover rate, which seriously affects the overall efficiency of circuit board solder joint detection and cannot meet the needs of rapid changeover detection in mass production. Summary of the Invention

[0004] To address the problems mentioned in the background art, this invention proposes a circuit board solder joint detection fixture with a quick bottom mold switching function.

[0005] The objective of this invention can be achieved through the following technical solutions: A circuit board solder joint detection fixture with quick bottom mold switching function includes a frame and a detection module disposed inside the frame for detecting the continuity and reliability of electrical connections of the circuit board. A support module is also installed inside the frame, located below the detection module, and a bottom mold is detachably mounted on the support module. The bottom mold has multiple positioning grooves. The support module includes: The mounting base is fixedly installed on the workbench inside the frame. A partition is fixedly installed on the inner side wall of the mounting base. Multiple sets of quick positioning switching modules for switching different specifications of bottom molds are installed on the partition. The fast positioning switching modules described in each group include: A positioning rod is used in conjunction with one of the positioning slots, and the positioning rod is provided with a locking component for quickly locking the bottom mold; A synchronous lowering component is mounted on a locking component, and the synchronous lowering component is equipped with a vibration component for accelerating the rapid descent of the bottom mold, and the locking component is also equipped with a power adjustment component for adjusting the vibration frequency of the vibration component.

[0006] As a further preferred embodiment of this technical solution: each of the positioning rods is divided into a conical segment and a cylindrical segment from top to bottom, and the conical segment and the cylindrical segment are fixedly connected; Each of the positioning grooves is divided into columnar grooves and trumpet-shaped grooves from top to bottom; Furthermore, the diameter of the cylindrical section is adapted to the inner wall diameter of the positioning groove.

[0007] As a further preferred embodiment of this technical solution: each group of locking components includes: A pressure ring is slidably disposed on a cylindrical section, and a fixed ring is disposed on the cylindrical section. A first return spring is disposed between the pressure ring and the fixed ring and sleeved on the outside of the positioning rod to drive the pressure ring to return to its original position. Multiple pressure rods are provided and arranged in a circular array on the bottom surface of the pressure ring, and the pressure rods are slidably disposed with respect to the fixed ring; There are multiple racks, and each rack is fixedly installed at the bottom end of a pressure rod. Each rack is meshed with a sprocket. A fixing plate is provided on the bottom surface of the fixing ring. The sprocket is rotatably connected to the fixing plate. A rack is meshed with a second rack on the side of the sprocket away from the rack. Multiple push rods are provided, all of which are slidably mounted on a fixed ring. Each push rod has a strong magnet at its top end. The bottom mold has several mounting slots arranged in a ring array around the positioning slots. Each mounting slot has a fixed iron block inside that corresponds to and cooperates with a strong magnet. Each of the aforementioned push rods has a connecting rod fixedly connected to its side wall, and the end of the connecting rod away from the push rod is fixedly connected to the second rack.

[0008] As a further preferred embodiment of this technical solution: the synchronous downward movement component includes: There are two connecting frames, which are fixedly and symmetrically arranged on the pressure ring, and each connecting frame is fixedly connected to a base. The second sliding sleeve is fixedly connected to the partition plate, and a movable rod is slidably provided on the inner side of the second sliding sleeve. The bottom end of the movable rod is fixedly connected to the second limiting block, and a second reset spring for resetting the base is sleeved on the outer side of the movable rod, located between the second sliding sleeve and the second limiting block.

[0009] As a further preferred embodiment of this technical solution: the vibration assembly includes: The fixed base is fixedly connected to the top of each of the bases by means of vibration damping blocks; A vibrating plate is positioned directly above a fixed base, and the vibrating plate is arranged at the same height as the pressure ring. Several vibrating springs are fixedly connected to the bottom surface of the vibrating plate, and the end of each vibrating spring away from the vibrating plate is fixedly connected to the fixed base. Several No. 3 guide shafts are fixedly connected to the fixed base, and each No. 3 guide shaft is respectively positioned on the inner side of the vibrating spring. A sliding rod is fixedly connected to the bottom surface of the vibrating plate, and a sliding sleeve is fixedly provided on the partition plate. The sliding rod passes through the fixed seat and is slidably connected to the inner side of the sliding sleeve. A rotating shaft is rotatably mounted at the bottom of the slide rod. A disc is fixedly mounted at each end of the rotating shaft, and a counterweight is eccentrically mounted on each disc. The drive module, installed inside the mounting base, is used for the rotation of the shaft.

[0010] As a further preferred embodiment of this technical solution: the driving module includes: A drive motor is fixedly connected to the inner bottom surface of the mounting base, and a protruding rod is fixedly connected to the output end of the drive motor; A first connecting seat is provided, on which a first bevel gear and a second bevel gear are rotatably connected and meshed. The first bevel gear is slidably mounted on a protruding rod, and the second bevel gear is fixedly connected to the end of the rotating shaft.

[0011] As a further preferred embodiment of this technical solution: the power regulation component includes: A push rod, one end of which is hinged to the side wall of a corresponding base via a hinge seat, and a slider is rotatably mounted on the other end of the push rod; An adjustable sliding rheostat is mounted on the inner bottom surface of the mounting base via a bracket. The adjustable sliding rheostat is equipped with an adjustment switch, and the adjustment switch is equipped with a fixing bracket. The fixing bracket has a sliding groove for the slider to slide.

[0012] As a further preferred embodiment of this technical solution: the adjustable sliding rheostat is electrically connected to the drive motor, and the power of the drive motor is controlled by adjusting the resistance value of the adjustable sliding rheostat.

[0013] As a further preferred embodiment of this technical solution: the driving module further includes: The second guide shaft is fixedly mounted on the inner bottom surface of the mounting base, and the first connecting seat is slidably mounted on the second guide shaft. The outer side of the second guide shaft is fitted with a third reset spring for driving the first connecting seat to reset, and a third limiting block is fixedly connected to the outer wall of the second guide shaft. The third reset spring is arranged between the first connecting seat and the third limiting block.

[0014] As a further preferred embodiment of this technical solution: the detection module includes: A cylinder is fixedly connected to the top surface of the frame. A lifting seat is fixedly installed at the output end of the cylinder. An ICT pin detection assembly is connected to the bottom surface of the lifting seat through a fixing rod for detecting the circuit board on the bottom mold. The top plate is fixedly connected to the frame, and a guide shaft is slidably connected to the top plate. The bottom end of the guide shaft is fixedly connected to the lifting seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the bottom mold is quickly positioned by the cooperation of the positioning rod and the positioning groove. The positioning rod is divided into a conical section and a cylindrical section from top to bottom, and the positioning groove is divided into a columnar groove and a trumpet-shaped groove. The top diameter of the conical section is small and the bottom diameter of the trumpet-shaped groove is large. This structural design can effectively reduce the difficulty of alignment. Even if there is a small deviation during positioning, the positioning rod can be quickly guided into the positioning groove. As the bottom mold falls, the cylindrical section of the positioning rod will be embedded in the columnar groove of the positioning groove, completing the positioning of the bottom mold and restricting its movement. With the quick positioning switching module, the bottom mold can be quickly docked and positioned without additional adjustment mechanism, which greatly shortens the changeover time and improves the adaptability and positioning efficiency of the tooling.

[0016] 2. In this invention, the locking component is triggered simultaneously with the pressing down of the bottom mold. The pressure ring and pressure rod drive the rack and gear to move together, driving the energized strong magnet on the top rod to rise and attract and lock with the fixed iron block of the bottom mold, thus realizing the automatic and rapid locking of the bottom mold. At the same time, the attraction between the energized strong magnet and the fixed iron block is more secure and faster than the traditional bolt fixing method, avoiding the bottom mold from moving the circuit board during the testing process, eliminating problems such as missed detection and test failure, and improving the accuracy of cold solder joint detection.

[0017] 3. In this invention, the synchronous lowering component moves down synchronously with the locking component, causing the vibration component to always be in contact with the bottom surface of the bottom mold. The drive module drives the eccentric counterweight to rotate and generate vibration force, accelerating the bottom mold to fall into place quickly.

[0018] 4. In this invention, the power adjustment component is linked with the synchronous lowering component. The adjustable sliding rheostat is driven by the push rod to adjust the resistance value, thereby reducing the power of the drive motor and the vibration frequency in real time. The vibration automatically stops after the bottom mold is locked. This "vibration acceleration-frequency reduction-automatic stop" setting solves the problems of bottom mold falling and slow positioning.

[0019] 5. In this invention, each positioning rod is equipped with an independent power adjustment component on its side. When the bottom mold tilts during the descent, the pressure ring corresponding to the tilted part drops more, causing the power adjustment component to adjust the resistance of the adjustable sliding rheostat to a higher value. This results in a decrease in the power of the drive motor and a reduction in the vibration frequency, while the vibration frequency of other parts remains normal. By utilizing the difference in vibration force between different parts, the tilted bottom mold is automatically leveled. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the installation of the bottom mold of the present invention; Figure 3 This is a partial cross-sectional view of the mounting base of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the structure of the rapid positioning switching module of the present invention; Figure 6 This is a partial structural diagram of the locking component of the present invention; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the structure of the vibration assembly of the present invention; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point C; Figure 10 for Figure 8 Enlarged schematic diagram of the structure at point D; Figure 11 A partial cross-sectional view of the bottom mold of the present invention. Figure 1 ; Figure 12 A partial cross-sectional view of the bottom mold of the present invention. Figure 2 ; Figure 13 This is a schematic diagram of the detection module of the present invention; Figure 14 This is a schematic diagram of the electrical connection between the drive motor and the adjustable sliding rheostat of the present invention.

[0021] Legend: 1. Frame; 2. Detection module; 21. Cylinder; 22. Lifting seat; 23. Fixing rod; 24. ICT pin detection assembly; 25. Guide shaft No. 1; 26. Top plate; 3. Bearing module; 31. Mounting base; 32. Partition; 33. Positioning rod; 331. Conical section; 332. Cylindrical section; 34. Locking assembly; 341. Pressure ring; 342. Return spring No. 1; 343 344. Pressure rod; 345. Fixing plate; 346. Circular gear; 347. Rack No. 1; 348. Rack No. 2; 349. Connecting rod; 340. Top rod; 3410. Energized strong magnet; 3411. Fixing ring; 35. Synchronous downward movement assembly; 351. Connecting frame; 352. Base; 353. Sliding sleeve No. 2; 354. Return spring No. 2; 355. Limiting block No. 2; 36. Power adjustment assembly; 61. Hinge seat; 362. Push rod; 363. Fixing frame; 364. Slider; 365. Slide groove; 366. Adjustable sliding rheostat; 37. Vibration assembly; 370. Drive module; 3701. Drive motor; 3702. Protruding rod; 3703. First bevel gear; 3704. Second bevel gear; 3705. First connecting seat; 3706. Second guide shaft; 3708. Third return spring 3709, Limiting Block No. 3; 372, Rotating Shaft; 373, Disc; 374, Counterweight Block; 375, Sliding Sleeve No. 1; 376, Sliding Rod; 377, Fixed Seat; 378, Vibrating Plate; 379, Vibration Spring; 3710, Guide Shaft No. 3; 3712, Vibration Damping Block; 4, Bottom Mold; 41, Positioning Groove; 411, Columnar Groove; 412, Horn-shaped Groove; 42, Mounting Groove; 43, Fixed Iron Block. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-14This application provides a circuit board solder joint detection fixture with a quick bottom mold switching function, including a frame 1 and a detection module 2 disposed inside the frame 1 for detecting the electrical connection continuity and contact reliability of the circuit board. A support module 3 is also installed inside the frame 1, located below the detection module 2, and a bottom mold 4 is detachably mounted on the support module 3. The bottom mold 4 has multiple positioning slots 41. It should be noted that the bottom mold 4 has multiple specifications for mounting circuit boards of different specifications. The different specifications of the bottom mold 4 refer to the different shapes and sizes of the areas where the circuit boards are mounted, while the overall shape and size of the bottom mold 4 are fixed. Therefore, the positions of the positioning slots 41 on the different specifications of the bottom mold 4 are all set according to a unified standard. The support module 3 includes: Mounting base 31 is fixedly installed on the workbench inside the frame 1. The mounting base 31 is a rectangular block with an open top. The mounting base 31 is preferably fixed to the workbench of the frame 1 by bolts. A partition 32 is fixedly provided on the inner side wall of the mounting base 31. Multiple sets of quick positioning switching modules for switching different specifications of bottom mold 4 are installed on the partition 32. It should be noted that the quick positioning switching modules are preferably three sets, and are installed on the partition 32 in an equilateral triangle layout. Alternatively, at least four sets of quick positioning switching modules can be provided, symmetrically arranged on the partition 32, and located on the bottom mold 4, avoiding the area where the circuit board is installed. The fast positioning switching modules described in each group include: The positioning rod 33 is used in conjunction with one of the positioning slots 41, and the positioning rod 33 is provided with a locking component 34 for quickly locking the bottom mold 4; The synchronous lowering component 35 is mounted on the locking component 34, and the synchronous lowering component 35 is equipped with a vibration component 37 for accelerating the rapid descent of the bottom mold 4, and the locking component 34 is also equipped with a power adjustment component 36 for adjusting the vibration frequency of the vibration component 37.

[0024] Specifically, by aligning the positioning groove 41 on the bottom mold 4 with the positioning rod 33, the bottom mold 4 can trigger the locking component 34 to move downward, thereby achieving automatic and rapid locking of the bottom mold 4, reducing the time for replacing the bottom mold 4, and increasing efficiency. At the same time, the locking component 34 can trigger the synchronous downward moving component 35 to move downward, and simultaneously start the vibration component 37 to vibrate on the bottom surface of the bottom mold 4 to accelerate the rapid descent of the bottom mold 4 and lock it in place. Meanwhile, the synchronous downward moving component 35 can drive the power adjustment component 36 on it to adjust the vibration frequency of the vibration component 37 until the vibration component 37 is locked by the locking component 34, at which point the vibration component 37 stops vibrating, ensuring stability during the circuit board testing process.

[0025] Furthermore, each of the positioning rods 33 is divided into a conical section 331 and a cylindrical section 332 from top to bottom, and the top of the conical section 331 is chamfered to prevent the top of the mounting base 31 from being too sharp and accidentally injuring personnel, and the conical section 331 and the cylindrical section 332 are fixedly connected. Each of the positioning grooves 41 is divided into a columnar groove 411 and a trumpet-shaped groove 412 from top to bottom; Furthermore, the diameter of the cylindrical section 332 is adapted to the inner wall diameter of the positioning groove 41.

[0026] Specifically, when the positioning groove 41 is aligned with the positioning rod 33 directly below it, the top diameter of the conical segment 331 is small, while the bottom diameter of the flared groove 412 is large, which makes it easy for the positioning rod 33 to be inserted into the interior of the positioning groove 41. Even if there is a small deviation, multiple positioning grooves 41 and positioning rods 33 can be quickly aligned, greatly reducing the time required to align the positioning rod 33 with the positioning groove 41. As the bottom mold 4 falls, the cylindrical segment 332 will fit into the inner side of the cylindrical groove 411, completing the positioning and restricting the movement of the bottom mold 4, thereby initially locking the position of the bottom mold 4.

[0027] Furthermore, each group of locking components 34 includes: A pressure ring 341 is slidably disposed on a cylindrical section 332, and a fixing ring 3411 is disposed on the cylindrical section 332. A first return spring 342 is disposed between the pressure ring 341 and the fixing ring 3411 and sleeved on the outside of the positioning rod 33, which is used to drive the pressure ring 341 to return to its original position. This allows the pressure ring 341 to return to its original position during the process of replacing and removing the bottom mold 4. Multiple pressure rods 343 are provided and arranged in a ring array on the bottom surface of the pressure ring 341, and the pressure rods 343 are slidably disposed with the fixed ring 3411; There are multiple racks 346, and each rack 346 is fixedly installed at the bottom end of a pressure rod 343. Each rack 346 is meshed with a sprocket 345. A fixing plate 344 is provided on the bottom surface of the fixing ring 3411. The sprocket 345 is rotatably connected to the fixing plate 344. A rack 347 is meshed with the side of the sprocket 345 away from the rack 346. Multiple push rods 349 are provided, all of which are slidably mounted on the fixed ring 3411. Each push rod 349 has a strong magnet 3410 at its top. It should be noted that the strong magnet 3410 is an electromagnet. The frame 1 is integrated with a controller for controlling the power supply of the strong magnet 3410. The bottom mold 4 has several mounting slots 42 arranged in a ring array around the positioning slot 41. Each mounting slot 42 has a fixed iron block 43 inside that corresponds to and cooperates with a strong magnet 3410. Each of the top rods 349 has a connecting rod 348 fixedly connected to its side wall, and the end of the connecting rod 348 away from the top rod 349 is fixedly connected to the second rack 347.

[0028] Specifically, during the process of installing the bottom mold 4 onto the bearing module 3, the bottom surface of the bottom mold 4 can press the pressure ring 341, which in turn drives multiple pressure rods 343 to slide downward relative to the fixed ring 3411. The pressure rods 343 drive the first rack 346 to move downward, the first rack 346 pushes the sprocket 345 to rotate, and the sprocket 345 pushes the second rack 347 to move in the opposite direction to the first rack 346. The second rack 347 pushes itself upward and enters the interior of the mounting groove 42. When the energized strong magnet 3410 is energized, it can attract the strong magnet 3410 to the fixed iron block 43. Thus, after the bottom mold 4 is installed onto the bearing module 3, it can be firmly locked, preventing the bottom mold 4 from moving the circuit board during the testing process, which could cause misalignment and lead to missed detections or testing failures.

[0029] Furthermore, the synchronous downward movement component 35 includes: There are two connecting brackets 351, which are fixedly and symmetrically arranged on the pressure ring 341, and each connecting bracket 351 is fixedly connected to a base 352. The second sliding sleeve 353 is fixedly connected to the partition plate 32, and a movable rod is slidably provided on the inner side of the second sliding sleeve 353 to serve as a guide. The bottom end of the movable rod is fixedly connected to the second limiting block 355, and a second return spring 354 for resetting the base 352 is sleeved on the outer side of the movable rod, located between the second sliding sleeve 353 and the second limiting block 355. Specifically, when the pressure ring 341 moves downward, it can drive the connecting frame 351 to move downward. The connecting frame 351 drives the base 352 to move downward. The base 352 drives the power adjustment component 36 on it to operate synchronously and automatically, and can also drive the vibration component 37 to move downward synchronously, so that the vibration force of the vibration component 37 can always act on the bottom surface of the bottom mold 4.

[0030] Furthermore, the vibration assembly 37 includes: The fixed base 377 is fixedly connected to the top of each of the bases 352 by vibration damping blocks 3712. It should be noted that the vibration damping blocks 3712 are preferably made of rubber. The vibration on the fixed base 377 is offset by the vibration damping blocks 3712 to avoid affecting the normal operation of the power adjustment component 36. A vibrating plate 378 is positioned directly above the fixed base 377, and is arranged at the same height as the pressure ring 341. This allows the vibrating plate 378 to fit against the bottom surface of the bottom mold 4 after the bottom mold 4 is placed on the pressure ring 341. Several vibrating springs 379 are fixedly connected to the bottom surface of the vibrating plate 378, and the end of each vibrating spring 379 away from the vibrating plate 378 is fixedly connected to the fixed base 377. Several guide shafts 3710 are fixedly connected to the fixed base 377, and each guide shaft 3710 is respectively positioned inside the vibrating spring 379 to guide it and prevent the vibrating spring 379 from deforming. The slide rod 376 is fixedly connected to the bottom surface of the vibrating plate 378, and a first sliding sleeve 375 is fixedly provided on the partition plate 32. The slide rod 376 passes through the fixed seat 377 and is slidably connected to the inner side of the first sliding sleeve 375. A rotating shaft 372 is rotatably mounted at the bottom of a sliding rod 376. A disc 373 is fixedly mounted at each end of the rotating shaft 372, and a counterweight 374 is eccentrically mounted on each disc 373. The drive module 370 is installed inside the mounting base 31 and is used to rotate the shaft 372.

[0031] Specifically, the drive module 370 drives the rotating shaft 372 to rotate, and the rotating shaft 372 drives the disc 373 to rotate. Since the disc 373 is equipped with a counterweight 374, it can drive the slide bar 376 to move up and down, and apply force to the vibrating plate 378 and the vibration spring 379 to generate vibration. The vibration can be transmitted to the bottom surface of the bottom mold 4 on both sides of each positioning rod 33, accelerating the rapid installation of the bottom mold 4.

[0032] Furthermore, the drive module 370 includes: The drive motor 3701 is fixedly connected to the inner bottom surface of the mounting base 31, and the output end of the drive motor 3701 is fixedly connected to the protrusion 3702; A first connecting seat 3705 is provided, on which a first bevel gear 3703 and a second bevel gear 3704 are rotatably connected and meshed. The first bevel gear 3703 is slidably mounted on a protruding rod 3702. It should be noted that the cross-section of the protruding rod 3702 is not a regular circle, so that it can both drive the first bevel gear 3703 to rotate and allow the first bevel gear 3703 to slide on the protruding rod 3702. The second bevel gear 3704 is fixedly connected to the end of the rotating shaft 372.

[0033] Specifically, the drive motor 3701 drives the convex rod 3702 to rotate, the convex rod 3702 drives the first bevel gear 3703 to rotate, the first bevel gear 3703 drives the second bevel gear 3704 to rotate, the second bevel gear 3704 drives the rotating shaft 372 to rotate, and by sliding the disc 373 on the convex rod 3702, the position of the drive motor 3701 can be changed without changing it.

[0034] Furthermore, the power regulation component 36 includes: Push rod 362, one end of which is hinged to the side wall of a corresponding base 352 via hinge seat 361, and a slider 364 is rotatably provided on the other end of the push rod 362; An adjustable sliding rheostat 366 is mounted on the inner bottom surface of the mounting base 31 via a bracket. An adjustment switch is provided on the adjustable sliding rheostat 366. It should be noted that the adjustment switch on the adjustable sliding rheostat 366 is used to adjust the resistance value of the adjustable sliding rheostat 366, and the initial end is defined as the low resistance end. A fixing bracket 363 is provided on the adjustment switch, and a groove 365 is provided on the fixing bracket 363 for the slider 364 to slide.

[0035] Specifically, during the downward movement of the locking component 34 and the synchronous downward moving component 35, the push rod 362 can be rotated. The push rod 362 drives the fixed frame 363 to move. The fixed frame 363 drives the adjustment switch on it to increase the resistance value of the adjustable sliding rheostat 366. In addition, the purpose of setting the slider 364 and the groove 365 is to counteract the longitudinal movement of the push rod 362.

[0036] Furthermore, the adjustable sliding rheostat 366 is electrically connected to the drive motor 3701. Adjusting the resistance of the adjustable sliding rheostat 366 controls the power of the drive motor 3701. During the downward movement of the bottom mold 4, adjusting the resistance of the adjustable sliding rheostat 366 reduces the power of the drive motor 3701 and lowers the vibration frequency until the bottom mold 4 is installed in the designated position. Afterward, the drive motor 3701 stops running, thus eliminating the vibration force on the bottom surface of the bottom mold 4, ensuring stability during the testing process. Additionally, since each positioning rod 33 has a power adjustment component 36 on both sides, it is possible to switch the bottom mold 4... During the process, if the bottom mold 4 tilts up and down, the resistance value of the power adjustment component 36 on the side of each positioning rod 33 will be different. For example, if a certain part of the bottom mold 4 descends too quickly, causing the bottom mold 4 to tilt, the height of the pressure ring 341 closer to this part will be lower than the height of other pressure rings 341. At this time, the fixed frame 363 drives the adjustment switch to move further on the adjustable sliding rheostat 366, increasing the resistance value. Conversely, the power of the drive motor 3701 that works with it is smaller, causing the vibration frequency to decrease. Meanwhile, the resistance values ​​of other parts are normal, and the vibration frequency will be higher than the above vibration frequency, thus automatically leveling the tilted bottom mold 4.

[0037] Furthermore, the drive module 370 also includes: The second guide shaft 3706 is fixedly mounted on the inner bottom surface of the mounting base 31, and the first connecting seat 3705 is slidably mounted on the second guide shaft 3706 to serve as a guide and prevent the first connecting seat 3705 from rotating. The outer side of the second guide shaft 3706 is fitted with a third return spring 3708 for driving the first connecting seat 3705 to reset, and a third limiting block 3709 is fixedly connected to the outer wall of the second guide shaft 3706. The third return spring 3708 is arranged between the first connecting seat 3705 and the third limiting block 3709.

[0038] Furthermore, the detection module 2 includes: Cylinder 21 is fixedly connected to the top surface of frame 1. A lifting seat 22 is fixedly installed at the output end of cylinder 21. An ICT pin detection assembly 24 is connected to the bottom surface of the lifting seat 22 by a fixing rod 23. It should be explained that ICT is an abbreviation for In-Circuit Test, which is an existing product technology used to test the circuit board on the bottom mold 4. The top plate 26 is fixedly connected to the frame 1, and a guide shaft 25 is slidably connected to the top plate 26. The bottom end of the guide shaft 25 is fixedly connected to the lifting seat 22, which serves as a guide.

[0039] Specifically, the cylinder 21 drives the lifting seat 22 to move up and down, so that after the circuit board is installed on the bottom mold 4, the ICT pin detection component assembly 24 can perform cold solder joint detection on the circuit board.

[0040] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A circuit board solder joint detection fixture with quick bottom mold switching function, comprising a frame (1) and a detection module (2) disposed inside the frame (1), used to detect the electrical connection continuity and contact reliability of the circuit board, characterized in that: The frame (1) also houses a support module (3) located below the detection module (2), and a bottom mold (4) is detachably mounted on the support module (3). The bottom mold (4) has multiple positioning slots (41). The support module (3) includes: Mounting base (31) is fixedly installed on the workbench inside the frame (1). A partition (32) is fixedly installed on the inner side wall of the mounting base (31). Multiple sets of quick positioning switching modules for switching different specifications of bottom mold (4) are installed on the partition (32). The fast positioning switching modules described in each group include: The positioning rod (33) is used in conjunction with one of the positioning slots (41), and the positioning rod (33) is provided with a locking component (34) for quickly locking the bottom mold (4). The synchronous lowering component (35) is installed on the locking component (34), and the synchronous lowering component (35) is equipped with a vibration component (37) for accelerating the rapid descent of the bottom mold (4), and the locking component (34) is also equipped with a power adjustment component (36) for adjusting the vibration frequency of the vibration component (37).

2. The circuit board solder joint detection fixture with quick bottom mold switching function according to claim 1, characterized in that, Each of the positioning rods (33) is divided into a conical segment (331) and a cylindrical segment (332) from top to bottom, and the conical segment (331) and the cylindrical segment (332) are fixedly connected to each other; Each of the positioning grooves (41) is divided into a columnar groove (411) and a trumpet-shaped groove (412) from top to bottom. Furthermore, the diameter of the cylindrical section (332) is adapted to the inner wall diameter of the positioning groove (41).

3. The circuit board cold solder joint detection fixture with quick bottom mold switching function according to claim 2, characterized in that, Each group of locking components (34) includes: A pressure ring (341) is slidably disposed on a cylindrical section (332), and a fixing ring (3411) is disposed on the cylindrical section (332). A first return spring (342) sleeved on the outside of the positioning rod (33) is disposed between the pressure ring (341) and the fixing ring (3411) to drive the pressure ring (341) to return to its original position. Multiple pressure rods (343) are provided and arranged in a ring array on the bottom surface of the pressure ring (341), and the pressure rods (343) are slidably disposed with the fixed ring (3411); There are multiple racks (346), and each rack (346) is fixedly installed at the bottom end of a pressure rod (343). Each rack (346) is meshed with a spur gear (345). A fixing plate (344) is provided on the bottom surface of the fixing ring (3411). The spur gear (345) is rotatably connected to the fixing plate (344). A rack (347) is meshed with the side of the spur gear (345) away from the rack (346). Multiple push rods (349) are provided, all of which are slidably mounted on the fixed ring (3411). Each push rod (349) has a strong magnet (3410) at its top end. The bottom mold (4) has several mounting slots (42) arranged in a ring array around the positioning slot (41). Each mounting slot (42) has a fixed iron block (43) inside that corresponds to and cooperates with a strong magnet (3410). Each of the top rods (349) has a connecting rod (348) fixedly connected to its side wall. The end of the connecting rod (348) away from the top rod (349) is fixedly connected to the second rack (347).

4. The circuit board cold solder joint detection fixture with quick bottom mold switching function according to claim 3, characterized in that, The synchronous downshift component (35) includes: There are two connecting brackets (351), which are fixed and symmetrically arranged on the pressure ring (341), and each connecting bracket (351) is fixedly connected to a base (352). The second sliding sleeve (353) is fixedly connected to the partition plate (32), and a movable rod is slidably provided on the inner side of the second sliding sleeve (353). The bottom end of the movable rod is fixedly connected to the second limiting block (355), and the outer side of the movable rod is fitted with a second reset spring (354) for resetting the base (352), which is located between the second sliding sleeve (353) and the second limiting block (355).

5. The circuit board cold solder joint detection fixture with quick bottom mold switching function according to claim 4, characterized in that, The vibration assembly (37) includes: The fixed base (377) is fixedly connected to the top of each of the bases (352) by means of vibration damping blocks (3712); A vibrating plate (378) is positioned directly above a fixed base (377), and the vibrating plate (378) and the pressure ring (341) are arranged at the same height. Several vibrating springs (379) are fixedly connected to the bottom surface of the vibrating plate (378), and the end of the vibrating spring (379) away from the vibrating plate (378) is fixedly connected to the fixed base (377). Several No. 3 guide shafts (3710) are fixedly connected to the fixed base (377), and each No. 3 guide shaft (3710) is respectively arranged on the inner side of the vibrating spring (379). The slide rod (376) is fixedly connected to the bottom surface of the vibrating plate (378), and a first sliding sleeve (375) is fixedly provided on the partition plate (32). The slide rod (376) passes through the fixed seat (377) and is slidably connected to the inner side of the first sliding sleeve (375). A rotating shaft (372) is rotatably mounted at the bottom of the slide bar (376). A disc (373) is fixedly mounted at each end of the rotating shaft (372), and a counterweight (374) is eccentrically mounted on each disc (373). The drive module (370) is installed inside the mounting base (31) and is used for the rotation of the shaft (372).

6. The circuit board cold solder joint detection fixture with quick bottom mold switching function according to claim 5, characterized in that, The drive module (370) includes: A drive motor (3701) is fixedly connected to the inner bottom surface of the mounting base (31), and a protruding rod (3702) is fixedly connected to the output end of the drive motor (3701). A first connecting seat (3705) is rotatably connected to a first bevel gear (3703) and a second bevel gear (3704), and the first bevel gear (3703) and the second bevel gear (3704) are meshed together. The first bevel gear (3703) is slidably disposed on the protruding rod (3702), and the second bevel gear (3704) is fixedly connected to the end of the rotating shaft (372).

7. A circuit board solder joint detection fixture with quick bottom mold switching function according to claim 6, characterized in that, The power regulation component (36) includes: A push rod (362) has one end hinged to the side wall of a corresponding base (352) via a hinge seat (361), and a slider (364) is rotatably provided on the other end of the push rod (362). An adjustable sliding rheostat (366) is mounted on the inner bottom surface of the mounting base (31) via a bracket. An adjustment switch is provided on the adjustable sliding rheostat (366), and a fixing bracket (363) is provided on the adjustment switch. A groove (365) for sliding of the slider (364) is provided on the fixing bracket (363).

8. The circuit board cold solder joint detection fixture with quick bottom mold switching function according to claim 7, characterized in that, The adjustable sliding rheostat (366) is electrically connected to the drive motor (3701). The power of the drive motor (3701) is controlled by adjusting the resistance value of the adjustable sliding rheostat (366).

9. A circuit board solder joint detection fixture with quick bottom mold switching function according to claim 7, characterized in that, The drive module (370) also includes: The second guide shaft (3706) is fixedly mounted on the inner bottom surface of the mounting base (31), and the first connecting seat (3705) is slidably mounted on the second guide shaft (3706). The outer side of the second guide shaft (3706) is fitted with a third return spring (3708) for driving the first connecting seat (3705) to reset. A third limiting block (3709) is fixedly connected to the outer wall of the second guide shaft (3706). The third return spring (3708) is arranged between the first connecting seat (3705) and the third limiting block (3709).

10. A circuit board solder joint detection fixture with quick bottom mold switching function according to claim 1, characterized in that, The detection module (2) includes: A cylinder (21) is fixedly connected to the top surface of the frame (1). A lifting seat (22) is fixedly provided at the output end of the cylinder (21). An ICT needle detection assembly (24) is connected to the bottom surface of the lifting seat (22) by a fixing rod (23) for detecting the circuit board on the bottom mold (4). The top plate (26) is fixedly connected to the frame (1), and a guide shaft (25) is slidably connected to the top plate (26). The bottom end of the guide shaft (25) is fixedly connected to the lifting seat (22).

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