Detection tool based on PCBA plug-in optical detection

Abstract

The utility model discloses a detection tool based on PCBA plug-in optical detection, and relates to the PCBA detection technology field, the detection tool comprises a pedestal, a rotating seat is arranged above the pedestal, the two ends of the rotating seat are fixedly provided with installation tools, the end surfaces of the two installation tools are provided with positioning fixing mechanisms, and the positioning fixing mechanisms are fixed on the pedestal. The base and the rotating seat are jointly provided with a rotating driving mechanism, the two positioning and fixing mechanisms comprise positioning columns fixedly arranged at the four corners of the upper end of the mounting tool, the side wall of each positioning column is provided with an annular groove, and an elastic air bag sleeve is fixedly mounted in each annular groove. According to the utility model, not only can the stability of the PCBA be effectively ensured, but also the PCBA is not limited by electronic components on the PCBA board, the PCBA is convenient to disassemble and assemble, abrasion is not easily caused, the operation is more convenient than that of a locking piece, and optical detection of the PCBA is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of PCBA testing technology, specifically to a testing fixture based on optical testing of PCBA components. Background Technology

[0002] PCBA refers to the assembly process of printed circuit boards. It involves mounting electronic components onto a printed circuit board so that they can be connected together to perform the functions of the circuit. This process is called PCBA. Inspection in PCBA is particularly important for product quality. Through optical inspection, defects such as missing components, wrong components, and reversed components can be detected in time.

[0003] For example, a testing fixture based on optical inspection of PCBA components disclosed in patent publication number CN216926600U includes a base and a PCBA board. A support plate is welded to one side of the top of the base, and a top plate is welded to the top of the support plate. A visual inspection device is provided on one side of the bottom of the top plate. A movable plate is provided at the top of the base, and connecting plates are welded to the four corners of the top of the movable plate. A fixing strip is welded to the top of the connecting plate, and a rotating column is rotatably connected between the fixing strip and the base. A retaining ring is welded to the outside of the rotating column.

[0004] When performing optical inspection on a PCBA, the PCBA board needs to be mounted on a fixture. The fixture needs to maintain sufficient stability for the PCBA. However, the aforementioned PCBA inspection fixture requires that there are no electronic components in the PCBA's insertion path during use; otherwise, collisions during insertion may damage electronic components. Therefore, the use of this type of inspection fixture is quite limited. Traditional inspection fixtures involve inserting the pre-drilled mounting holes on the circuit board into the positioning posts of the inspection fixture and locking them in place with locking devices. However, to maintain the accuracy of PCBA installation, the gap between the positioning posts and the mounting holes on the circuit board needs to be very small. During installation and subsequent removal, the mounting holes are prone to significant wear against the positioning posts. At the same time, due to the small gap between the positioning posts and the mounting holes, both installation and removal are inconvenient and the performance is unsatisfactory. Utility Model Content

[0005] In view of the problems existing in the current inspection fixtures based on PCBA plug-in optical inspection, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a testing fixture based on PCBA component optical inspection, which solves the problems of PCBA testing fixtures being greatly limited by electronic components, requiring the gap between the PCBA positioning post and the mounting hole of the circuit board to be kept very small, causing the mounting hole to easily wear against the positioning post during installation and subsequent removal, and the small gap between the positioning post and the mounting hole making both installation and removal inconvenient and resulting in poor performance.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An inspection fixture based on PCBA plug-in optical inspection includes a base, a rotating seat is provided on the top of the base, and mounting fixtures are fixedly installed at both ends of the rotating seat. The end faces of the two mounting fixtures are provided with positioning and fixing mechanisms. The base and the rotating seat are jointly equipped with a rotation drive mechanism.

[0009] Both positioning and fixing mechanisms include positioning posts fixedly installed at the four corners of the upper end of the installation fixture. Each positioning post has an annular groove on its side wall, and an elastic airbag sleeve is fixedly installed inside each annular groove. The installation fixture has a frame-shaped cavity inside, and the groove wall of each annular groove and the cavity wall of the frame-shaped cavity are both provided with a vent hole. The side wall of the installation fixture is provided with an inflation component that communicates with the frame-shaped cavity.

[0010] Preferably, the rotary drive mechanism includes a rotating shaft fixedly disposed at the lower end of the rotating base, the rotating shaft being rotatably connected to the end face of the base, a drive motor being fixedly installed inside the base, and the output end of the drive motor being drively connected to the rotating shaft.

[0011] Preferably, multiple protrusions are fixedly installed on the upper ends of both installation fixtures, and each protrusion has a groove on its end face. A suction cup is fixedly inserted into the bottom of each groove. A cavity is opened inside both installation fixtures, and each suction cup is connected to the cavity. A suction mechanism is installed in the cavity.

[0012] Preferably, both of the inflation components include a barrel fixedly inserted into the side wall of the mounting fixture, and the barrel is connected to the frame cavity. A piston column is slidably disposed inside the barrel, and a push rod is fixedly installed at the end of the piston column. The rod wall of the push rod is slidably connected to the barrel end of the barrel.

[0013] Preferably, both suction mechanisms include a cover fixedly mounted on the side wall of the mounting fixture. A piston plate is slidably mounted inside the cover, and a pull rod is fixedly mounted on the side wall of the piston plate. A circular hole is opened on the side wall of the cover, and the pull rod is movably connected to the circular hole. A communicating hole is opened on the cavity wall of the cavity, which is connected to the cover.

[0014] Preferably, an iron block is fixedly installed at the end of the piston rod, and a magnetic ring is fixedly installed on the inner wall of the barrel.

[0015] Preferably, two magnetic blocks are fixedly installed on the side wall of the piston plate, and two iron plates corresponding to the positions of the magnetic blocks are fixedly installed on the inner wall of the machine cover.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] 1. This utility model, through the cooperation of the base, rotating seat, and two mounting fixtures, can save time wasted in the intermediate installation and disassembly of PCBA boards by using the two mounting fixtures alternately. The positioning and fixing mechanism can achieve rapid positioning by utilizing the mounting holes of the PCBA itself. Furthermore, the expansion and pressing of the elastic airbag sleeve can not only effectively ensure the stability of the PCBA, but also avoid being restricted by the electronic components on the PCBA board. It also facilitates the assembly and disassembly of the PCBA, is less prone to wear, and is more convenient to operate than locking parts.

[0018] 2. This utility model, through the cooperation of the protrusions, grooves, suction cups, cavities and suction mechanism, can further improve the fixing effect of PCBA boards by negative pressure adsorption, and greatly improve the stability of PCBA boards during optical inspection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the installation fixture of this utility model;

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of the structure of section A;

[0023] Figure 4 This is a top view cross-sectional structural diagram of the cover of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Base; 2. Rotating seat; 3. Installation fixture; 4. Positioning post; 5. Annular groove; 6. Elastic airbag sleeve; 7. Frame cavity; 8. Vent hole; 10. Rotating shaft; 11. Drive motor; 12. Protrusion; 13. Suction cup; 14. Cavity; 15. Machine barrel; 16. Piston column; 17. Push rod; 18. Machine cover; 19. Piston plate; 20. Pull rod; 21. Round hole; 22. Connecting hole; 23. Iron block; 24. Magnetic ring; 25. Magnetic block; 26. Iron plate. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model discloses a testing fixture based on optical inspection of PCBA components.

[0028] This utility model provides, for example Figure 1-4 The inspection fixture shown includes a base 1, a rotating seat 2 is arranged on the top of the base 1, and mounting fixtures 3 are fixedly installed at both ends of the rotating seat 2. The end faces of the two mounting fixtures 3 are provided with positioning and fixing mechanisms. The base 1 and the rotating seat 2 are jointly equipped with a rotation drive mechanism.

[0029] Both positioning and fixing mechanisms include positioning posts 4 fixedly installed at the four corners of the upper end of the mounting fixture 3. Each positioning post 4 has an annular groove 5 on its side wall, and an elastic airbag sleeve 6 is fixedly installed inside each annular groove 5. The mounting fixture 3 has a frame-shaped cavity 7 inside, and the groove wall of each annular groove 5 and the cavity wall of the frame-shaped cavity 7 are both provided with a vent hole 8. The side wall of the mounting fixture 3 is provided with an inflation component that communicates with the frame-shaped cavity 7.

[0030] The rotary drive mechanism includes a rotating shaft 10 fixedly disposed at the lower end of the rotating base 2. The rotating shaft 10 is rotatably connected to the end face of the base 1. A drive motor 11 is fixedly installed inside the base 1, and the output end of the drive motor 11 is connected to the rotating shaft 10 for transmission. When the drive motor 1 is working, the rotating shaft 10 can drive the rotating base 2 to rotate.

[0031] Multiple protrusions 12 are fixedly installed on the upper end of both mounting fixtures 3, and each protrusion 12 has a groove on its end face. A suction cup 13 is fixedly inserted into the bottom of each groove. A cavity 14 is opened inside both mounting fixtures 3, and each suction cup 13 is connected to the cavity 14. A suction mechanism is installed in the cavity 14. By extracting the air inside the cavity 14, a negative pressure state can be formed inside each suction cup 13. The PCBA can be further fixed by using the pressure difference between the inside and outside.

[0032] Both inflation components include a barrel 15 fixedly inserted into the side wall of the mounting fixture 3, and the barrel 15 is connected to the frame cavity 7. A piston rod 16 is slidably arranged inside the barrel 15, and a push rod 17 is fixedly installed at the end of the piston rod 16. The rod wall of the push rod 17 is slidably connected to the barrel end of the barrel 15. By pushing the push rod 17, the piston rod 16 can be moved, thereby squeezing the air inside the barrel 15 into the frame cavity 7.

[0033] Both suction mechanisms include a cover 18 fixedly mounted on the side wall of the mounting fixture 3. A piston plate 19 is slidably mounted inside the cover 18, and a pull rod 20 is fixedly mounted on the side wall of the piston plate 19. A circular hole 21 is opened on the side wall of the cover 18, and the pull rod 20 is movably connected to the circular hole 21. A connecting hole 22 is opened on the cavity wall of the cavity 14, which communicates with the cover 18. By pulling the pull rod 20, the piston plate 19 can be moved, thereby drawing out the air inside the cavity 14 through the connecting hole 22.

[0034] An iron block 23 is fixedly installed at the end of the piston column 16, and a magnetic ring 24 is fixedly installed on the inner wall of the barrel 15. With this setting, the piston column 16 can be magnetically fixed after it is pushed into place, preventing the piston column 16 from moving back and affecting the fixing effect of the elastic airbag sleeve 6.

[0035] Two magnetic blocks 25 are fixedly installed on the side wall of the piston plate 19, and two iron plates 26 corresponding to the positions of the magnetic blocks 25 are fixedly installed on the inner wall of the cover 18. Through the magnetic attraction of the magnetic blocks 25 and the iron plates 26, the piston plate 19 can be easily fixed after being pulled out, preventing the piston plate 19 from moving back.

[0036] When using this testing fixture, the base 1 is placed below the testing end of the optical testing equipment. Then, the PCBA board to be tested is placed above the mounting fixture 3. Using the four positioning posts 4 and the mounting holes of the PCBA board itself, the PCBA is precisely positioned and installed on the mounting fixture 3. Then, the push rod 17 on this side is pushed, which can drive the piston rod 16 to move, thereby squeezing the air inside the barrel 15 into the frame cavity 7. At this time, the excess air inside the frame cavity 7 will enter the annular grooves 5 through the vent holes 8, which can cause the elastic airbag sleeves 6 to expand and lift. At this time, under the action of the expansion of the elastic airbag sleeves 6, the PCBA board can be effectively limited and fixed. Since the PCBA board is fixed by the elastic airbag sleeves 6, the gap between the positioning posts 4 and the mounting holes of the PCBA board is required to be small, and wear is not easy to occur. When it is necessary to remove the PCBA board after testing, the push rod 17 is pulled back, so that the excess air inside the annular grooves 5 flows back into the frame cavity 7. The operation is also more convenient than locking parts.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A testing fixture based on PCBA component optical inspection, comprising a base (1), characterized in that, A rotating seat (2) is provided above the base (1), and both ends of the rotating seat (2) are fixedly installed with mounting fixtures (3). The end faces of the two mounting fixtures (3) are provided with positioning and fixing mechanisms. The base (1) and the rotating seat (2) are jointly installed with a rotation drive mechanism. Both positioning and fixing mechanisms include positioning posts (4) fixedly installed at the four corners of the upper end of the installation fixture (3). Each positioning post (4) has an annular groove (5) on its side wall, and each annular groove (5) has an elastic airbag sleeve (6) fixedly installed inside. The installation fixture (3) has a frame cavity (7) inside, and the groove wall of each annular groove (5) and the cavity wall of the frame cavity (7) have a common ventilation hole (8). The side wall of the installation fixture (3) is provided with an inflation component that communicates with the frame cavity (7).

2. The inspection fixture based on PCBA component optical inspection according to claim 1, characterized in that, The rotary drive mechanism includes a rotating shaft (10) fixedly disposed at the lower end of the rotating seat (2), the rotating shaft (10) is rotatably connected to the end face of the base (1), a drive motor (11) is fixedly installed inside the base (1), and the output end of the drive motor (11) is connected to the rotating shaft (10) in a transmission connection.

3. The inspection fixture based on PCBA component optical inspection according to claim 1, characterized in that, Multiple protrusions (12) are fixedly installed on the upper end of both installation fixtures (3), and each protrusion (12) has a groove on its end face. A suction cup (13) is fixedly inserted into the bottom of each groove. A cavity (14) is opened inside both installation fixtures (3), and each suction cup (13) is connected to the cavity (14). A suction mechanism is installed in the cavity (14).

4. The inspection fixture based on PCBA component optical inspection according to claim 1, characterized in that, Both of the inflation assemblies include a barrel (15) fixedly inserted into the side wall of the mounting fixture (3), and the barrel (15) is connected to the frame cavity (7). A piston column (16) is slidably arranged inside the barrel (15), and a push rod (17) is fixedly installed at the end of the piston column (16). The rod wall of the push rod (17) is slidably connected to the barrel end of the barrel (15).

5. The inspection fixture based on PCBA component optical inspection according to claim 3, characterized in that, Both suction mechanisms include a housing (18) fixedly mounted on the side wall of the mounting fixture (3). A piston plate (19) is slidably mounted inside the housing (18), and a pull rod (20) is fixedly mounted on the side wall of the piston plate (19). A circular hole (21) is opened on the side wall of the housing (18), and the pull rod (20) is movably connected to the circular hole (21). A communicating hole (22) is opened on the cavity wall of the cavity (14) and communicates with the housing (18).

6. The inspection fixture based on PCBA component optical inspection according to claim 4, characterized in that, An iron block (23) is fixedly installed at the end of the piston rod (16), and a magnetic ring (24) is fixedly installed on the inner wall of the barrel (15).

7. The inspection fixture based on PCBA component optical inspection according to claim 5, characterized in that, Two magnetic blocks (25) are fixedly installed on the side wall of the piston plate (19), and two iron plates (26) corresponding to the positions of the magnetic blocks (25) are fixedly installed on the inner wall of the cover (18).

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