A printed circuit board test fixture

Abstract

This invention discloses a printed circuit board (PCB) test rack, relating to the technical field of PCB test racks. It includes a base with supporting legs fixed at each of the four corners of the base's bottom. A placement platform is positioned above the base, with limiting plates installed at each of the four corners of the platform's top. A vertical plate is mounted on one end of the base, and multiple mounting shells are installed on the inner wall of the vertical plate. One end of each mounting shell extends to one end of the vertical plate, and a fan is installed on the inner wall of the mounting shell. This invention uses a fan to blow away particulate contaminants such as dust and lint from the PCB. A pump draws cleaning fluid from inside a storage tank via a suction pipe, atomizes it through atomizing nozzles, and sprays it onto the PCB to clean other residues such as rosin flux. This process eliminates the need for manual operation and effectively treats residues on the PCB.

Description

Technical Field

[0001] This invention relates to the field of circuit board test fixture technology, specifically a printed circuit board test fixture. Background Technology

[0002] Printed circuit boards (PCBs) are providers of electrical connections for electronic components. They are made of insulating board as the substrate, cut to a certain size, and have at least one conductive pattern and holes. They are used to replace the chassis used to install electronic components and to enable interconnection between electronic components. Their main advantages are that they greatly reduce wiring and assembly errors and improve automation and productivity.

[0003] After the printed circuit boards are manufactured, they need to be placed on a test rack for some tests. At the same time, there will be residues on the surface of the printed circuit boards after production. If these residues are not cleaned during the testing of the circuit boards, they may affect the test results. Currently, the cleaning of the circuit boards during testing is usually done manually, which is time-consuming and labor-intensive.

[0004] According to the Chinese Patent Authorization Announcement No. CN215986364U, published on March 8, 2022, a printed circuit board test rack is disclosed. The patent states that "by setting a fan to blow off the residue on the circuit board, and setting a cleaning brush to sweep the residue that falls off the circuit board into the collection box through the drop groove, the time for cleaning the residue is saved by manpower".

[0005] However, the device only treats particulate contaminants such as dust attached to the circuit board. In actual production and processing, there are also some non-polar contaminants on the surface of the circuit board, such as rosin resin and paraffin. These residues cannot be cleaned by the fan alone. Therefore, in-depth research was conducted, which led to this case. Summary of the Invention

[0006] The purpose of this invention is to provide a printed circuit board test fixture to solve the problem of insufficient cleaning of residues mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a printed circuit board test rack, comprising a base, with supporting legs fixed at the four corners of the bottom of the base, a placement platform above the base, and limiting plates installed at the four corners of the top of the placement platform, a vertical plate installed at one end of the base, and multiple mounting shells installed on the inner wall of the vertical plate, one end of each mounting shell extending to one end of the vertical plate, and a fan installed on the inner wall of the mounting shell, an atomizing nozzle above the placement platform, two fixing rods installed on one side of the top of the base, and the top ends of the fixing rods being connected to one side of the bottom of the placement platform via hinges, a movable frame slidably installed on one side of the bottom of the placement platform, and a pneumatic push rod installed on one side of the bottom of the base, wherein the connection between the output end of the pneumatic push rod and the inner wall of the movable frame is a rotatable connection.

[0008] Preferably, a storage tank is installed on one side of the top of the base, and two connecting rods are installed on one side of the storage tank. One end of the connecting rod is connected to one side of the atomizing nozzle. A pump is installed at the top of the storage tank, and a liquid delivery pipe is installed at the output end of the pump. One end of the liquid delivery pipe is connected to the inside of the atomizing nozzle. A liquid extraction pipe is installed at the input end of the pump, and the bottom end of the liquid extraction pipe extends into the inside of the storage tank.

[0009] Preferably, a first baffle is fixed to one end of the top of the base, and a second baffle is fixed to the top of the base at one end of the first baffle. The first baffle and the second baffle are on the same vertical line, and a through groove is vertically penetrating inside the base inside the second baffle.

[0010] Preferably, the first baffle is shaped like a hollow semi-cylindrical shape, and the second baffle is shaped like a U.

[0011] Preferably, a collection hopper is installed on one side of the top of the base, and the bottom end of the collection hopper extends to the bottom end of the base, and the bottom end of the collection hopper is provided with an opening.

[0012] Preferably, a mounting box is fixed to one side of the bottom end of the base, and a second slot is provided on one side of one end of the mounting box, and a first slot is provided on one side of the other end of the mounting box. A solid collection box is provided inside the second slot, and a liquid collection box is provided inside the first slot.

[0013] Preferably, the inner walls of both the second and first empty slots have two guide grooves, and one end of each guide groove extends to one end of the mounting box. Guide blocks are installed on both sides of the solid collection box and the liquid collection box, and the solid collection box and the liquid collection box are slidably connected to the second and first empty slots respectively through the sliding fit between the guide blocks and the guide grooves.

[0014] Preferably, one end of the mounting shell is provided with multiple ventilation holes, and the other end of the mounting shell is provided with a dustproof net.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By activating the fan on the upright plate, airflow is generated, blowing away particulate contaminants such as dust and lint from the circuit board. The pump is then activated to draw cleaning fluid from the storage tank via the suction pipe and deliver it to the atomizing nozzle through the delivery pipe. The atomized fluid is then sprayed onto the circuit board to clean other residues such as rosin flux. No manual operation is required, and the printed circuit board can be thoroughly cleaned. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the present invention.

[0018] Figure 2 This is a top view of the structure of the present invention;

[0019] Figure 3 This is a rear view of the mounting box structure of the present invention;

[0020] Figure 4 This is a partial side view of the structure of the present invention.

[0021] In the diagram: 1. Pump; 2. Liquid delivery pipe; 3. Connecting rod; 4. Atomizing nozzle; 5. First baffle; 6. Limiting plate; 7. Collection hopper; 8. Placement platform; 9. Mounting box; 10. Pneumatic push rod; 11. Movable frame; 12. Support leg; 13. Base; 14. Liquid extraction pipe; 15. Storage tank; 16. Vertical plate; 17. Mounting shell; 18. Fan; 19. Second baffle; 20. Solid collection box; 21. Liquid collection box; 22. First empty trough; 23. Second empty trough; 24. Through groove; 25. Fixing rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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] Example: Please refer to Figure 1-4A printed circuit board test rack includes a base 13, with support legs 12 fixed at the four corners of the bottom of the base 13. A placement platform 8 is provided above the base 13, and limit plates 6 are installed at the four corners of the top of the placement platform 8. A vertical plate 16 is installed at one end of the base 13, and multiple mounting shells 17 are installed on the inner wall of the vertical plate 16. One end of the mounting shell 17 extends to one end of the vertical plate 16, and a fan 18 is installed on the inner wall of the mounting shell 17.

[0024] Multiple ventilation holes are provided at one end of the mounting shell 17, and a dustproof net is installed at the other end of the mounting shell 17.

[0025] An atomizing nozzle 4 is installed above the placement platform 8;

[0026] A storage tank 15 is installed on one side of the top of the base 13, and two connecting rods 3 are installed on one side of the storage tank 15. One end of the connecting rod 3 is connected to one side of the atomizing nozzle 4. A pump 1 is installed on the top of the storage tank 15, and a liquid delivery pipe 2 is installed at the output end of the pump 1. One end of the liquid delivery pipe 2 is connected to the inside of the atomizing nozzle 4. A liquid extraction pipe 14 is installed at the input end of the pump 1, and the bottom end of the liquid extraction pipe 14 extends into the inside of the storage tank 15.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the pump 1 is started, which uses the suction pipe 14 to draw out the cleaning fluid from the storage tank 15 and sends it through the delivery pipe 2 to the atomizing nozzle 4. The fluid is then atomized and sprayed onto the circuit board through the atomizing nozzle 4 to clean other residues on the circuit board, such as rosin flux.

[0028] Two fixed rods 25 are installed on one side of the top of the base 13, and the top of each fixed rod 25 is connected to one side of the bottom of the placement platform 8 through a hinge. A movable frame 11 is slidably installed on one side of the bottom of the placement platform 8, and a pneumatic push rod 10 is installed on one side of the bottom of the base 13. The connection between the output end of the pneumatic push rod 10 and the inner wall of the movable frame 11 is a rotatable connection.

[0029] A collection hopper 7 is installed on one side of the top of the base 13, and the bottom end of the collection hopper 7 extends to the bottom end of the base 13, with an opening at the bottom end of the collection hopper 7.

[0030] Specifically, such as Figure 1 and Figure 2 As shown, the pneumatic push rod 10 is activated, which pushes the movable frame 11. While the movable frame 11 moves on the placement platform 8, it applies a thrust to the placement platform 8, causing the placement platform 8 to rotate around the hinge connected to the fixed rod 25. This causes the side of the placement platform 8 away from the collection hopper 7 to be raised to a certain height, so that the liquid above it can slide down the inclined circuit board into the interior of the collection hopper 7.

[0031] A first baffle 5 is fixed to one end of the base 13, and a second baffle 19 is fixed to the top of the base 13 at one end of the first baffle 5. The first baffle 5 and the second baffle 19 are on the same vertical line. A through groove 24 is vertically penetrating inside the base 13 inside the second baffle 19.

[0032] The first baffle 5 is shaped like a hollow semi-cylindrical shape, and the second baffle 19 is shaped like a U.

[0033] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, the first baffle 5 can block and limit the pollutants carried by the airflow, causing them to slide slowly down the inner wall of the first baffle 5. The second baffle 19 can prevent them from hitting the first baffle 5 and then bouncing back to the bottom of the base 13.

[0034] A mounting box 9 is fixed to one side of the bottom end of the base 13. A second empty slot 23 is opened on one side of one end of the mounting box 9, and a first empty slot 22 is opened on one side of the other end of the mounting box 9. A solid collection box 20 is installed inside the second empty slot 23, and a liquid collection box 21 is installed inside the first empty slot 22.

[0035] The inner walls of the second empty slot 23 and the first empty slot 22 are each provided with two guide slots, and one end of each guide slot extends to one end of the mounting box 9. Guide blocks are installed on both sides of the solid collection box 20 and the liquid collection box 21, and the solid collection box 20 and the liquid collection box 21 are slidably connected to the second empty slot 23 and the first empty slot 22 respectively through the sliding fit between the guide blocks and the guide slots.

[0036] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, both the solid collection box 20 and the liquid collection box 21 of the device can be pulled out from inside the installation box 9, which facilitates centralized cleaning of the solid collection box 20 and subsequent processing and reuse of the liquid inside the liquid collection box 21.

[0037] Working principle: When using this device, first place the printed circuit board to be tested on the placement table 8. The limiting plate 6 can restrict the position of the circuit board. At this time, start the fan 18 on the upright plate 16, so that the fan 18 drives the air flow and blows away particulate contaminants such as dust and lint on the circuit board. These contaminants will be carried by the airflow until they hit the first baffle 5. Then they will slowly slide down along the inner wall of the first baffle 5 and fall into the solid collection box 20 from the through groove 24. The second baffle 19 can prevent them from rebounding to the bottom of the base 13 after hitting the first baffle 5.

[0038] After cleaning particulate pollutants, the pneumatic push rod 10 can be activated to push the movable frame 11. The movable frame 11 moves on the placement platform 8 and applies a thrust to the placement platform 8, causing the placement platform 8 to rotate around the hinge connected to the fixed rod 25. This causes the side of the placement platform 8 away from the collection hopper 7 to be raised to a certain height. Then, the pump 1 is activated to extract the cleaning fluid from the storage tank 15 through the liquid extraction pipe 14 and send it to the atomizing nozzle 4 through the liquid delivery pipe 2. The fluid is then atomized and sprayed onto the circuit board through the atomizing nozzle 4 to clean other residues on the circuit board, such as rosin flux. The liquid will slide down the inclined circuit board into the inside of the collection hopper 7 and flow into the liquid collection box 21 from the opening of the collection hopper 7 for collection.

[0039] Both the solid collection box 20 and the liquid collection box 21 of the device can be pulled out from the installation box 9, which makes it convenient to clean the solid collection box 20 in a centralized manner and to process and reuse the liquid inside the liquid collection box 21. After cleaning the circuit board, the fan 18 can be turned on again to help the circuit board dry.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A printed circuit board test rack, comprising a base (13), wherein support legs (12) are fixed at the four corners of the bottom end of the base (13), and a placement platform (8) is provided above the base (13), and limit plates (6) are installed at the four corners of the top end of the placement platform (8), characterized in that: One end of the base (13) is equipped with a vertical plate (16), and a plurality of mounting shells (17) are installed on the inner wall of the vertical plate (16). One end of the mounting shell (17) extends to one end of the vertical plate (16), and a fan (18) is installed on the inner wall of the mounting shell (17). An atomizing nozzle (4) is provided above the placement platform (8). Two fixing rods (25) are installed on one side of the top of the base (13), and the top ends of the fixing rods (25) are connected to one side of the bottom of the placement platform (8) through hinges. A movable frame (11) is slidably installed on one side of the bottom of the placement platform (8). A pneumatic push rod (10) is installed on one side of the bottom of the base (13), and the connection between the output end of the pneumatic push rod (10) and the inner wall of the movable frame (11) is a rotating connection. A first baffle (5) is fixed at one end of the base (13), and a second baffle (19) is fixed at the top end of the base (13) at one end of the first baffle (5). The first baffle (5) and the second baffle (19) are on the same vertical line. A through groove (24) is vertically penetrating inside the base (13) inside the second baffle (19). The first baffle (5) is shaped like a hollow semi-cylindrical shape, and the second baffle (19) is shaped like a U. The base (13) has a mounting box (9) fixed on one side of its bottom end, and a second slot (23) is provided on one side of the mounting box (9), and a first slot (22) is provided on one side of the other end of the mounting box (9). A solid collection box (20) is provided inside the second slot (23), and a liquid collection box (21) is provided inside the first slot (22). The inner walls of the second empty slot (23) and the first empty slot (22) are provided with two guide slots, and one end of each guide slot extends to one end of the mounting box (9). Guide blocks are installed on both sides of the solid collection box (20) and the liquid collection box (21), and the solid collection box (20) and the liquid collection box (21) are slidably connected to the second empty slot (23) and the first empty slot (22) respectively through the sliding fit between the guide blocks and the guide slots.

2. A printed circuit board test fixture according to claim 1, characterized in that: A storage tank (15) is installed on one side of the top of the base (13), and two connecting rods (3) are installed on one side of the storage tank (15). One end of the connecting rod (3) is connected to one side of the atomizing nozzle (4). A pump (1) is installed at the top of the storage tank (15), and a liquid delivery pipe (2) is installed at the output end of the pump (1). One end of the liquid delivery pipe (2) is connected to the inside of the atomizing nozzle (4). A liquid extraction pipe (14) is installed at the input end of the pump (1), and the bottom end of the liquid extraction pipe (14) extends into the inside of the storage tank (15).

3. A printed circuit board test fixture according to claim 1, characterized in that: A collection hopper (7) is installed on one side of the top of the base (13), and the bottom end of the collection hopper (7) extends to the bottom end of the base (13), and the bottom end of the collection hopper (7) is provided with an opening.

4. A printed circuit board test fixture according to claim 1, characterized in that: The mounting shell (17) has multiple ventilation holes at one end, and a dustproof net is installed at the other end of the mounting shell (17).

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