Exposure device for processing printed circuit board

Abstract

The utility model relates to the technical field of printed circuit board processing, in particular to an exposure device for processing a printed circuit board, which comprises an exposure box, a shielding component arranged on the exposure box, a shielding door arranged on the shielding component, a sliding block connected with the bottom surface of the inner wall of the exposure box in a sliding manner, and a top frame fixedly arranged on the sliding block, one side of the upper end of the top frame is arc-shaped, a workbench is arranged on the upper side of the sliding block, a PCB is placed on the top face of the workbench, the outer wall of the workbench is fixedly connected with the inner wall of the top frame, the outer wall of the top frame is slidably connected with the inner wall of the shielding door, and an exposure light source module is installed at the upper end of the exposure box. The exposure light source module is used for carrying out exposure treatment on the PCB in the exposure box, the top frame pushes the shielding door to be opened again after exposure processing is completed, the exposed PCB is conveniently taken down, a new to-be-exposed PCB is placed in the shielding door, the operation process of the shielding door is simplified, rapid opening and closing are achieved, the working efficiency is improved, and the production cost is reduced. And the taking and placing efficiency of the PCB is improved.

Description

Technical Field

[0001] This utility model relates to the field of printed circuit board processing technology, specifically to an exposure device for printed circuit board processing. Background Technology

[0002] In the process of printing circuit board (PCB) manufacturing, exposure is a device used to transfer circuit patterns from a mask (or film) to a PCB board. Exposure is a key step in PCB manufacturing, and the quality of exposure directly affects the circuit accuracy of the circuit board and the performance of the final product.

[0003] A search revealed a Chinese patent with publication number CN212623571U entitled "An Exposure Control Device for Printed Circuit Boards". The device involves opening a protective door, placing the circuit board on a stage, moving a slider to bring it closer to the circuit board, then moving a threaded tube along a slider to bring it closer to the circuit board, and finally rotating the threaded rod to move it downwards. A soft pad is used to press the circuit board down, thereby preventing the circuit board from shifting during the exposure process.

[0004] However, during use, it was found that the device requires manually opening the protective door, placing the PCB board into the exposure area, and then closing the protective door. This process needs to be repeated many times. In large-scale production, the labor consumption is high, which can easily lead to worker fatigue and misoperation, further increasing labor costs and safety risks, and even affecting the exposure efficiency of printed circuit board (PCB) processing. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an exposure device for printed circuit board processing. The device exposes the PCB board inside the exposure box using an exposure light source module. After the exposure process is completed, the top frame pushes the shielding door open again, facilitating the removal of the exposed PCB board and the placement of a new PCB board to be exposed. This simplifies the operation of the shielding door, enables rapid opening and closing, improves work efficiency, and enhances the efficiency of PCB board handling and placement.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an exposure device for printed circuit board processing, including an exposure box, a shielding component on the exposure box, a shielding door on the shielding component, the upper end of the shielding door being rotatably connected to the exposure box via a rotating shaft, a slider being slidably connected to the bottom surface of the inner wall of the exposure box, a top frame being fixedly mounted on the slider, one side of the upper end of the top frame being arc-shaped, a worktable being mounted on the upper side of the slider, a PCB board being placed on the top surface of the worktable, the outer wall of the worktable being fixedly connected to the inner wall of the top frame, the outer wall of the top frame being slidably connected to the inner wall of the shielding door, and an exposure light source module being installed at the upper end of the exposure box.

[0007] Furthermore, the shielding assembly includes a positioning block, and a spring is fixedly mounted on the bottom surface of the positioning block. There are two positioning blocks and two springs respectively. The bottom surfaces of the two springs are fixedly connected to the top surface of the shielding door, and the inner wall of the shielding door abuts against the lower outer wall of the exposure box.

[0008] The above technical solution seals the exposure box with a shielding door, preventing light leakage during the exposure process and improving sealing effect and work efficiency.

[0009] Furthermore, a cylinder is mounted on the rear wall of the exposure box via a mounting base. The piston rod of the cylinder extends through the outer wall of the exposure box into the interior, and the piston rod of the cylinder is fixedly connected to the outer wall of the slider.

[0010] The above technical solution involves extending or retracting the piston rod of the cylinder, which drives the slider to slide along the bottom surface of the inner wall of the exposure box.

[0011] Furthermore, the lower end of the exposure box has two symmetrically arranged limiting grooves, and the top frame has two such grooves. The inner walls of the two top frames are respectively fixedly connected to the outer wall of the slider, and the outer wall of the top frame is slidably connected to the exposure box through the limiting grooves.

[0012] Through the above technical solution, the top frame is driven to slide along the inner wall of the exposure box through the limiting groove during the movement of the slider, which ensures the stability and accuracy of the top frame during the movement.

[0013] Furthermore, a T-shaped groove is provided on the top surface of the workbench, and a bidirectional lead screw is provided inside the T-shaped groove. The outer peripheral walls at both ends of the bidirectional lead screw are rotatably connected to the workbench. A forward and reverse motor is mounted on the workbench via a mounting base, and the output shaft of the forward and reverse motor is coaxially connected to the bidirectional lead screw.

[0014] Furthermore, the T-groove has two T-shaped blocks that are symmetrically connected inside, and the two T-shaped blocks are respectively connected to a bidirectional lead screw through threaded holes.

[0015] The above technical solution uses the output shaft of a reversible motor to drive a bidirectional lead screw to rotate along the worktable, thereby driving two T-blocks to move closer to each other.

[0016] Furthermore, a clamping block is fixed on the top surface of the T-shaped block, and the inner wall of the clamping block abuts against the outer wall of the PCB board.

[0017] Through the above technical solution, the T-shaped block slides along the T-shaped groove, while driving the clamping block to move synchronously, so that the two clamping blocks respectively abut against the outer wall of the PCB board for fixation.

[0018] Furthermore, an air intake fan is connected to one side wall of the exposure box, and the air intake fan is mounted on the side wall of the exposure box via a mounting base. Multiple exhaust pipes with one-way valves are connected to the other side wall of the exposure box, and the exhaust pipes are inclined.

[0019] The above technical solution delivers fresh air or a specific gas from outside into the exposure chamber via an air intake fan. Driven by the fresh gas, it is effectively discharged to the outside through an inclined exhaust pipe.

[0020] By employing the above technical solution, this utility model provides an exposure apparatus for printed circuit board processing, which has at least the following beneficial effects:

[0021] 1. This exposure device for printed circuit board processing uses a slider that slides along the bottom of the inner wall of the exposure box, simultaneously moving the top frame and the worktable. The moving outer wall of the top frame pushes the shielding door to rotate, and the shielding door opens by rotating along the exposure box via a pivot, facilitating quick opening of the shielding door. After the PCB board to be exposed is placed on the top surface of the worktable, the slider and top frame retract to their initial positions. At this time, the shielding door gradually separates from the top frame and retracts to its initial position, bringing the shielding door into contact with the exposure box. The exposure light source module then exposes the PCB board inside the exposure box. After the exposure process is completed, the top frame pushes the shielding door open again, facilitating the removal of the exposed PCB board and the placement of a new PCB board to be exposed. This simplifies the operation of the shielding door, enables rapid opening and closing, improves work efficiency, and enhances the efficiency of PCB board handling and placement.

[0022] 2. In this exposure device for printed circuit board processing, when the top frame pushes the shielding door to rotate, the shielding door is compressed by the spring. When the top frame retracts, the shielding door is pushed back to its initial position by the restoring force of the spring. The shielding door seals the exposure box, preventing light leakage during the exposure process, improving the sealing effect and working efficiency, and ensuring the stability and accuracy of the exposure process.

[0023] 3. The exposure device for printed circuit board processing uses the piston rod of the cylinder to extend or retract, which drives the slider to slide along the bottom surface of the inner wall of the exposure box. During the movement of the slider, the top frame slides along the inner wall of the exposure box through the limiting groove, ensuring the stability and accuracy of the top frame during the movement.

[0024] 4. This exposure device for printed circuit board processing drives a bidirectional lead screw to rotate along the worktable via the output shaft of a reversible motor. This drives two T-shaped blocks to move closer to each other. At this time, the T-shaped blocks slide along the T-slot, simultaneously driving the clamping blocks to move synchronously. This allows the two clamping blocks to abut against the outer wall of the PCB board for fixation, ensuring the relative position stability between the PCB board and the exposure light source module. This improves the accuracy and consistency of exposure, enhances the stability of the PCB board during worktable movement, and adapts to the processing requirements of PCB boards of different sizes and shapes.

[0025] 5. This exposure device for printed circuit board processing precisely exposes the PCB board located inside the exposure chamber through an exposure light source module. As the exposure process proceeds, a certain amount of heat and harmful gases are generated inside the exposure chamber. Fresh air or specific gases from outside are delivered into the exposure chamber by an intake fan. Driven by the fresh gas, the gases are effectively exhausted to the outside through an inclined exhaust pipe. The inclined exhaust pipe not only ensures smooth gas exhaust but also effectively prevents external contaminants from flowing back into the exposure chamber through the exhaust pipe, thereby maintaining the cleanliness inside the exposure chamber. This provides a stable, clean, and suitable gas environment for the PCB board, improving the accuracy and consistency of exposure, reducing temperature and pressure fluctuations inside the exposure chamber, and thus reducing the risk of equipment damage due to overheating or corrosion, extending the service life of the equipment. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a rear perspective view of the overall structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the internal structure of the exposure box of this utility model;

[0030] Figure 4 This is a schematic diagram of the workbench structure of this utility model;

[0031] Figure 5 This is a schematic diagram of the assembly of the T-shaped block structure of this utility model.

[0032] In the diagram: 1. Exposure box; 2. Shielding assembly; 201. Shielding door; 202. Rotating shaft; 203. Positioning block; 204. Spring; 3. Slider; 4. Top frame; 5. Worktable; 6. PCB board; 7. Cylinder; 8. Limiting groove; 9. T-slot; 10. Bidirectional lead screw; 11. Forward and reverse motor; 12. T-block; 13. Clamping block; 14. Air inlet fan; 15. Exhaust pipe; 16. Exposure light source module. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an exposure device for printed circuit board processing, including an exposure box 1, a shielding component 2 on the exposure box 1, a shielding door 201 on the shielding component 2, the upper end of the shielding door 201 being rotatably connected to the exposure box 1 via a rotating shaft 202, a slider 3 being slidably connected to the bottom surface of the inner wall of the exposure box 1, a top frame 4 being fixedly mounted on the slider 3, one side of the upper end of the top frame 4 being arc-shaped, a worktable 5 being mounted on the upper side of the slider 3, a PCB board 6 being placed on the top surface of the worktable 5, the outer wall of the worktable 5 being fixedly connected to the inner wall of the top frame 4, the outer wall of the top frame 4 being slidably connected to the inner wall of the shielding door 201, and an exposure light source module 16 being installed on the upper end of the exposure box 1.

[0035] The shielding component 2 includes a positioning block 203, and a spring 204 is fixedly mounted on the bottom surface of the positioning block 203. There are two positioning blocks 203 and two springs 204. The bottom surfaces of the two springs 204 are fixedly connected to the top surface of the shielding door 201. The inner wall of the shielding door 201 abuts against the lower outer wall of the exposure box 1. The shielding door 201 seals the exposure box 1, preventing light leakage during the exposure process and improving the sealing effect and working efficiency.

[0036] Working principle: The slider 3 slides along the bottom surface of the inner wall of the exposure box 1, which simultaneously drives the top frame 4 and the worktable 5 to move synchronously. The moving outer wall of the top frame 4 pushes the shielding door 201 to rotate. The shielding door 201 rotates and opens along the exposure box 1 via the pivot 202, which facilitates the quick opening of the shielding door 201. After the PCB board 6 to be exposed is placed on the top surface of the worktable 5, the slider 3 and the top frame 4 return to their initial positions. At this time, the shielding door 201 gradually separates from the top frame 4 and returns to its initial position, so that the shielding door 201 comes into contact with the exposure box 1.

[0037] At this time, the PCB board 6 inside the exposure box 1 is exposed by the exposure light source module 16. After the exposure process is completed, the top frame 4 pushes the shielding door 201 to open again, which makes it easy to remove the exposed PCB board 6 and put in a new PCB board 6 to be exposed. This simplifies the operation of the shielding door 201, realizes quick opening and closing, improves work efficiency, and enhances the efficiency of picking up and placing the PCB board 6.

[0038] When the top frame 4 pushes the shielding door 201 to rotate, the shielding door 201 compresses the spring 204. When the top frame 4 retracts, the shielding door 201 is pushed back to its initial position by the restoring force of the spring 204. The shielding door 201 seals the exposure box 1, preventing light leakage during the exposure process, improving the sealing effect and working efficiency, and ensuring the stability and accuracy of the exposure process. Example 2

[0039] like Figure 1-5 As shown, based on Embodiment 1, a cylinder 7 is mounted on the rear wall of the exposure box 1 via a mounting base. The piston rod of the cylinder 7 extends through the outer wall of the exposure box 1 to the interior. The piston rod of the cylinder 7 is fixedly connected to the outer wall of the slider 3. By extending or retracting the piston rod of the cylinder 7, the slider 3 is driven to slide along the bottom surface of the inner wall of the exposure box 1.

[0040] The lower part of the exposure box 1 has two symmetrical limiting grooves 8. The top frame 4 has two grooves, and the inner walls of the two top frames 4 are fixedly connected to the outer wall of the slider 3. The outer wall of the top frame 4 is slidably connected to the exposure box 1 through the limiting grooves 8. When the slider 3 moves, it drives the top frame 4 to slide along the inner wall of the exposure box 1 through the limiting grooves 8, which ensures the stability and accuracy of the top frame 4 during the movement.

[0041] The top surface of the worktable 5 has a T-shaped groove 9, and a bidirectional lead screw 10 is installed inside the T-shaped groove 9. The outer peripheral walls of both ends of the bidirectional lead screw 10 are rotatably connected to the worktable 5. A forward and reverse motor 11 is installed on the worktable 5 through a mounting base. The output shaft of the forward and reverse motor 11 is coaxially connected to the bidirectional lead screw 10. There are two T-shaped blocks 12 with a symmetrical structure inside the T-shaped groove 9. The two T-shaped blocks 12 are threadedly connected to the bidirectional lead screw 10 through threaded holes. The output shaft of the forward and reverse motor 11 drives the bidirectional lead screw 10 to rotate along the worktable 5, driving the two T-shaped blocks 12 to move closer to each other.

[0042] The top surface of the T-shaped block 12 is fixed with a clamping block 13, and the inner wall of the clamping block 13 abuts against the outer wall of the PCB board 6. The T-shaped block 12 slides along the T-shaped groove 9, and at the same time drives the clamping block 13 to move synchronously, so that the two clamping blocks 13 abut against the outer wall of the PCB board 6 respectively for fixation.

[0043] When in use, if the slider 3 needs to be moved, the piston rod of the cylinder 7 extends or retracts, causing the slider 3 to slide along the bottom surface of the inner wall of the exposure box 1. During the movement of the slider 3, the top frame 4 slides along the inner wall of the exposure box 1 through the limiting groove 8, ensuring the stability and accuracy of the top frame 4 during the movement.

[0044] After the PCB board 6 is placed, the output shaft of the forward and reverse motor 11 drives the bidirectional lead screw 10 to rotate along the worktable 5, driving the two T-blocks 12 to move closer to each other. At this time, the T-blocks 12 slide along the T-slots 9, and at the same time drive the clamping blocks 13 to move synchronously, so that the two clamping blocks 13 respectively abut against the outer wall of the PCB board 6 for fixation, ensuring the relative position stability between the PCB board 6 and the exposure light source module 16, thereby improving the accuracy and consistency of exposure, improving the stability of the PCB board 6 during the movement of the worktable 5, and adapting to the processing requirements of PCB boards 6 of different sizes and shapes. Example 3

[0045] like Figure 1 , Figure 2 and Figure 3 As shown, based on Embodiment 2, an air intake fan 14 is connected to one side wall of the exposure box 1. The air intake fan 14 is installed on the side wall of the exposure box 1 via a mounting base. Multiple exhaust pipes 15 with one-way valves are connected to the other side wall of the exposure box 1. The exhaust pipes 15 are inclined. Fresh air or specific gas from outside is delivered to the inside of the exposure box 1 through the air intake fan 14. Under the push of the fresh gas, it is effectively discharged to the outside through the inclined exhaust pipes 15.

[0046] In use, the PCB board 6 located inside the exposure box 1 is precisely exposed by the exposure light source module 16. As the exposure process proceeds, a certain amount of heat and harmful gases are generated inside the exposure box 1. Fresh air or specific gases from the outside are delivered into the exposure box 1 by the air intake fan 14. Driven by the fresh gas, the gases are effectively discharged to the outside through the inclined exhaust pipe 15.

[0047] The inclined exhaust pipe 15 not only ensures smooth gas discharge but also effectively prevents external contaminants from flowing back into the exposure chamber 1 through the exhaust pipe 15, thereby maintaining the cleanliness inside the exposure chamber 1. This provides a stable, clean, and suitable gas environment for the PCB board 6, improving the accuracy and consistency of exposure, reducing temperature and pressure fluctuations inside the exposure chamber 1, and thus reducing the risk of equipment damage due to overheating or corrosion, extending the service life of the equipment.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An exposure apparatus for printed circuit board processing, comprising an exposure box (1), characterized in that: The exposure box (1) is provided with a shielding component (2), and the shielding component (2) is provided with a shielding door (201). The upper end of the shielding door (201) is rotatably connected to the exposure box (1) through a rotating shaft (202). A slider (3) is slidably connected to the bottom surface of the inner wall of the exposure box (1). A top frame (4) is fixed on the slider (3). One side of the upper end of the top frame (4) is arc-shaped. A workbench (5) is provided on the upper side of the slider (3). A PCB board (6) is placed on the top surface of the workbench (5). The outer wall of the workbench (5) is fixedly connected to the inner wall of the top frame (4). The outer wall of the top frame (4) is slidably connected to the inner wall of the shielding door (201). An exposure light source module (16) is installed on the upper end of the exposure box (1).

2. The exposure apparatus for printed circuit board processing according to claim 1, characterized in that: The shielding component (2) includes a positioning block (203), and a spring (204) is fixedly provided on the bottom surface of the positioning block (203). There are two positioning blocks (203) and two springs (204). The bottom surfaces of the two springs (204) are fixedly connected to the top surface of the shielding door (201). The inner wall of the shielding door (201) abuts against the lower outer wall of the exposure box (1).

3. The exposure apparatus for printed circuit board processing according to claim 1, characterized in that: A cylinder (7) is mounted on the rear wall of the exposure box (1) via a mounting base. The piston rod of the cylinder (7) extends through the outer wall of the exposure box (1) to the interior. The piston rod of the cylinder (7) is fixedly connected to the outer wall of the slider (3).

4. The exposure apparatus for printed circuit board processing according to claim 3, characterized in that: The lower end of the exposure box (1) has two symmetrical limiting grooves (8). The top frame (4) has two, and the inner walls of the two top frames (4) are fixedly connected to the outer wall of the slider (3). The outer wall of the top frame (4) is slidably connected to the exposure box (1) through the limiting grooves (8).

5. The exposure apparatus for printed circuit board processing according to claim 4, characterized in that: The top surface of the workbench (5) is provided with a T-shaped groove (9), and a bidirectional lead screw (10) is provided inside the T-shaped groove (9). The outer peripheral walls of both ends of the bidirectional lead screw (10) are rotatably connected to the workbench (5). A forward and reverse motor (11) is installed on the workbench (5) through a mounting base. The output shaft of the forward and reverse motor (11) is coaxially connected to the bidirectional lead screw (10).

6. The exposure apparatus for printed circuit board processing according to claim 5, characterized in that: The T-groove (9) has two T-blocks (12) with a symmetrical structure inside, and the two T-blocks (12) are respectively threaded to the bidirectional lead screw (10) through threaded holes.

7. The exposure apparatus for printed circuit board processing according to claim 6, characterized in that: The top surface of the T-shaped block (12) is fixed with a clamping block (13), and the inner wall of the clamping block (13) abuts against the outer wall of the PCB board (6).

8. The exposure apparatus for printed circuit board processing according to claim 1, characterized in that: One side wall of the exposure box (1) is connected to an air intake fan (14), which is mounted on the side wall of the exposure box (1) via a mounting base. The other side wall of the exposure box (1) is connected to multiple exhaust pipes (15) with one-way valves, which are inclined.

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