A PCB optical detection device

Abstract

This utility model belongs to the field of PCB board inspection technology, and in particular to an optical inspection device for PCB boards, comprising: a body and an arc-shaped block. A bracket is welded and fixed to the top of the body, a first optical detector is installed at the bottom of the bracket, a second optical detector is installed in the middle of the body, and an inspection stage is provided on the inner side of the body. This optical inspection device for PCB boards, by starting a first motor, drives a rotating disk and a connecting rod to rotate. The connecting rod can move through a through groove inside a fixed rod via a protrusion on one side, driving the fixed rod to move. The fixed rod then drives the inspection stage towards the first optical detector. The inspection stage drives a gear to mesh with a rack plate, thereby causing the gear and the placement disk to rotate. The first optical detector can inspect the top of the PCB board on the placement disk, while the PCB board is inspected from the side by the second optical detector as the placement disk rotates.

Description

Technical Field

[0001] This utility model relates to the field of PCB board inspection technology, specifically to an optical inspection device for PCB boards. Background Technology

[0002] PCB, or Printed Circuit Board, is an important electronic component. It serves as the support for electronic components and the carrier for their electrical connections. Because it is manufactured using electronic printing techniques, it is called a "printed" circuit board. After PCB production, it needs to be inspected using optical inspection equipment, which can detect minute positional deviations within the PCB.

[0003] For example, CN202122242939.7 describes an optical inspection device for PCB boards. This utility model addresses the problems of manual inspection of existing PCB boards, which is labor-intensive, has low inspection accuracy, and is prone to omissions. It is equipped with a base, a conveyor belt, a crossbeam seat, and an inspection mechanism. The PCB board is placed on the conveyor belt, and the inspection mechanism moves back and forth on the crossbeam seat to perform comprehensive automatic inspection of the passing PCB boards, avoiding omissions and improving inspection efficiency.

[0004] When the optical inspection device in the aforementioned patent inspects a PCB board, the optical detector is installed on top and can only inspect the upper surface of the PCB board, while the sides of the PCB board are often ignored, resulting in a large blind spot in the inspection position.

[0005] To address the aforementioned issues, this application proposes an optical inspection device for PCB boards. Utility Model Content

[0006] The purpose of this invention is to provide an optical inspection device for PCB boards, so as to solve the problem mentioned in the background art that existing PCB boards are not convenient for comprehensive inspection.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an optical inspection device for PCB boards, comprising: a body and an arc-shaped block; a bracket is welded and fixed to the top of the body; a first optical detector is installed at the bottom of the bracket; a second optical detector is installed in the middle of the body; and an inspection stage is provided on the inner side of the body.

[0008] A first motor is installed at the bottom of the machine body. A rotating disk is fixedly connected to the output end of the first motor. A connecting rod is welded and fixed to one side of the rotating disk. A protrusion is welded and fixed to one side of the connecting rod. A fixed rod is slidably connected to the outside of the protrusion. A through groove and an arc groove matching the protrusion are opened inside the fixed rod. An arc block is fixedly connected to one side of the arc groove.

[0009] Preferably, the top of the fixing rod is fixedly connected to the testing platform, and limit blocks are fixedly connected to both sides of the testing platform.

[0010] Preferably, the machine body has a sliding groove inside that matches the limiting block, and the outer side of the limiting block is slidably connected to the sliding groove via ball bearings, and the top of the detection table is movably connected to a gear via a rotating shaft.

[0011] Preferably, a placement plate is fixedly connected to the top of the gear, and a rack plate matching the gear is fixedly connected to the inner side of the machine body.

[0012] Preferably, an electric push rod is fixed to the bottom of the bracket, a connecting frame is fixedly connected to the bottom of the electric push rod, and a baffle is movably connected to the bottom of the connecting frame via a rotating shaft.

[0013] Preferably, a second motor is mounted on one side of the machine body via a mounting bracket, and a transmission roller is fixedly connected to the output end of the second motor.

[0014] Preferably, a conveyor belt is sleeved on the outside of the transmission roller, a sponge pad is fixedly connected to the outside of the conveyor belt, and one side of the transmission roller is movably connected to the machine body through a bearing.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] When the first motor starts, it drives the rotating disk and connecting rod to rotate. The connecting rod can move through a through groove inside the fixed rod via a protrusion on one side, driving the fixed rod and the detection table to move. The detection table drives the gear to mesh with the rack plate, thereby causing the gear and the placement disk to rotate. The first optical detector can detect the top of the PCB board on the placement disk, while the PCB board will be detected from the side by the second optical detector when the placement disk rotates. During the movement of the detection table, the top PCB board will come into contact with the baffle. At this time, the baffle will rotate to allow the PCB board to pass through. When the connecting rod continues to rotate, it will drive the fixed rod to move in the opposite direction to reset. At this time, the PCB board on the top of the placement disk will come into contact with the baffle again. The PCB board will fall onto the conveyor belt due to the obstruction of the baffle. The conveyor belt will transport the qualified PCB boards. When the first or second optical detector detects that the PCB board is unqualified, the controller will control the electric push rod to move the connecting frame and the baffle upward, and the PCB board will be sent back to the loading position, where the operator can remove the unqualified product.

[0017] 1. After the PCB board is manufactured, it needs to be inspected for minute positional deviations on its surface using an optical inspection device. During inspection, the PCB board is placed on the inspection table. When the first motor starts, it drives the rotating disk and connecting rod to rotate. The connecting rod can move through a through groove inside the fixed rod via a protrusion on one side, driving the fixed rod to move. The fixed rod will then drive the inspection table towards the first optical detector. The inspection table will drive the gear to mesh with the rack plate, thereby causing the gear and the placement disk to rotate. The first optical detector can inspect the top of the PCB board on the placement disk, while the PCB board will be inspected from the side by the second optical detector when the placement disk rotates. In this way, the PCB board on the optical inspection device can be inspected from multiple angles.

[0018] 2. After the PCB board production is completed, it needs to be inspected for minute positional deviations on its surface using an optical inspection device. During the movement of the inspection table, the top PCB board will come into contact with the baffle. The baffle will then rotate, allowing the PCB board to pass through. As the connecting rod continues to rotate, it will cause the fixing rod to move in the opposite direction to reset. At this point, the PCB board on top of the tray will again come into contact with the baffle. Blocked by the baffle, the PCB board will fall onto the conveyor belt. The sponge pad on the outside of the conveyor belt will cushion the falling PCB board. Simultaneously, the second motor will drive the conveyor belt through the transmission rollers, transporting the qualified PCB boards. When the first or second optical detector detects a defective PCB board, it will send a signal to the controller. The controller will then control the electric push rod to move the connecting frame and baffle upwards. At this point, the PCB board will not come into contact with the baffle and will be returned to the loading position. Workers can then remove the defective products. This process facilitates the classification of the inspected PCB boards. Attached Figure Description

[0019] Figure 1 This is a front-view perspective view of the present invention;

[0020] Figure 2 This is a rear-view perspective view of the present invention;

[0021] Figure 3 This is a schematic diagram of the main sectional view of this utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the present invention from the right side.

[0023] Figure 5 This is an enlarged schematic diagram of A of this utility model.

[0024] In the diagram: 1. Machine body; 2. Support frame; 3. First optical detector; 4. Second optical detector; 5. Detection table; 6. First motor; 7. Rotating disk; 8. Connecting rod; 9. Protrusion; 10. Fixing rod; 11. Through groove; 12. Arc groove; 13. Arc block; 14. Limiting block; 15. Gear; 16. Placement disk; 17. Rack plate; 18. Electric push rod; 19. Connecting frame; 20. Baffle; 21. Second motor; 22. Transmission roller; 23. Conveyor belt; 24. Sponge pad. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-4 This utility model provides a technical solution: an optical inspection device for PCB boards, comprising: a body 1 and an arc-shaped block 13, a bracket 2 welded and fixed to the top of the body 1, a first optical detector 3 installed at the bottom of the bracket 2, a second optical detector 4 installed in the middle of the body 1, and an inspection stage 5 provided on the inner side of the body 1.

[0027] A first motor 6 is installed at the bottom of the machine body 1. A rotating disk 7 is fixedly connected to the output end of the first motor 6. A connecting rod 8 is welded and fixed to one side of the rotating disk 7. A protrusion 9 is welded and fixed to one side of the connecting rod 8. A fixed rod 10 is slidably connected to the outside of the protrusion 9. The fixed rod 10 has a through groove 11 and an arc groove 12 that match the protrusion 9 inside. An arc block 13 is fixedly connected to one side of the arc groove 12. The top of the fixed rod 10 is fixedly connected to the detection table 5. Limiting blocks 14 are fixedly connected to both sides of the detection table 5. A sliding groove matching the limiting block 14 is opened inside the machine body 1. The outer side of the limiting block 14 is slidably connected to the sliding groove through a ball bearing. A gear 15 is movably connected to the top of the detection table 5 through a rotating shaft. A placement disk 16 is fixedly connected to the top of the gear 15. A rack plate 17 matching the gear 15 is fixedly connected to the inner side of the machine body 1. The gear 15 forms a rotating structure with the detection table 5 through the rotating shaft. The limiting block 14 forms a sliding structure with the machine body 1.

[0028] In practice, after the PCB board is produced, it is necessary to use an optical inspection device to detect the slight positional deviations on its surface. During inspection, the PCB board is placed on the inspection table 5. When the first motor 6 is started, it will drive the rotating disk 7 and the connecting rod 8 to rotate. The connecting rod 8 can move through the through groove 11 inside the fixed rod 10 via the protrusion 9 on one side, thus moving the fixed rod 10. When the fixed rod 10 is far away from the rightmost position, the protrusion 9 will be in the position of the arc groove 12 and will not contact the inner side of the fixed rod 10 within a certain rotation range. At this time, the fixed rod 10 will be in a stationary state, which makes it convenient to place the PCB board on the placement tray 16.

[0029] When the protrusion 9 continues to rotate and returns to the position of the through slot 11, it can contact the inner side of the fixing rod 10, thereby driving the fixing rod 10 to move. The fixing rod 10 will drive the detection stage 5 to move towards the first optical detector 3. The detection stage 5 will drive the gear 15 to mesh with the rack plate 17, thereby causing the gear 15 and the placement disk 16 to rotate. The first optical detector 3 can detect the top of the PCB board on the placement disk 16, while the side of the PCB board will be detected by the second optical detector 4 when the placement disk 16 rotates. The gear 15 can rotate one revolution by meshing with the rack plate 17 to ensure that the side of the PCB board is completely detected. In this way, the above operation can facilitate multi-directional detection of the PCB board on the PCB board optical inspection device.

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 An electric push rod 18 is fixed to the bottom of the bracket 2, and a connecting frame 19 is fixedly connected to the bottom of the electric push rod 18. A baffle 20 is movably connected to the bottom of the connecting frame 19 via a rotating shaft. A second motor 21 is mounted on one side of the machine body 1 via a mounting bracket. A transmission roller 22 is fixedly connected to the output end of the second motor 21. A conveyor belt 23 is sleeved on the outside of the transmission roller 22. A sponge pad 24 is fixedly connected to the outside of the conveyor belt 23. One side of the transmission roller 22 is movably connected to the machine body 1 via a bearing. The connecting frame 19 and the baffle 20 form a rotating structure via a rotating shaft.

[0031] In practice, after the PCB board is produced, it is necessary to use an optical inspection device to detect the slight positional deviation on its surface. After the connecting rod 8 rotates 180°, it will push the fixing rod 10 to the leftmost end. The arc block 13 can make up for the stroke gap caused by the arc groove 12. During the movement of the inspection table 5, it will drive the PCB board on the top to contact the baffle 20. At this time, the baffle 20 will rotate to allow the PCB board to pass through. After passing through, the baffle 20 will rotate and reset. When the connecting rod 8 continues to rotate, it will drive the fixing rod 10 to reset in the opposite direction. At this time, the PCB board on the top of the placement tray 16 will contact the baffle 20 again. Since one side of the baffle 20 is in contact with the plane of the connecting frame 19, the baffle 20 will not rotate. When the placement tray 16 moves, the PCB board will fall onto the conveyor belt 23 due to the obstruction of the baffle 20. The sponge pad 24 on the outside of the conveyor belt 23 can buffer the falling PCB board. At the same time, the second motor 21 will drive the conveyor belt 23 to move through the transmission roller 22 to transport the qualified PCB board.

[0032] When the first optical detector 3 or the second optical detector 4 detects that the PCB board is unqualified, it will send a signal to the controller. The controller can control the electric push rod 18 to drive the connecting frame 19 and the baffle 20 to move upward. At this time, the PCB board will not contact the baffle 20 when it moves. The PCB board will be sent back to the loading position, and the staff can take out the unqualified products. In this way, the PCB boards that have been inspected can be easily classified.

[0033] In summary: When using the optical inspection device for PCB boards, the PCB board is first placed on the placement tray 16 on top of the inspection stage 5. The first motor 6 can drive the drive assembly to pull the inspection stage 5 to move back and forth. During the movement, the first optical detector 3 and the second optical detector 4 can inspect the PCB board. This is the characteristic of the optical inspection device for PCB boards. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An optical inspection device for PCB boards, comprising: The machine body (1) and the arc-shaped block (13) are provided. A bracket (2) is welded and fixed to the top of the machine body (1). A first optical detector (3) is installed at the bottom of the bracket (2). A second optical detector (4) is installed in the middle of the machine body (1). A detection platform (5) is provided on the inner side of the machine body (1). The machine body (1) is characterized in that: The bottom of the body (1) is equipped with a first motor (6), and the output end of the first motor (6) is fixedly connected to a rotating disk (7). A connecting rod (8) is welded and fixed to one side of the rotating disk (7), and a protrusion (9) is welded and fixed to one side of the connecting rod (8). A fixing rod (10) is slidably connected to the outside of the protrusion (9). The fixing rod (10) has a through groove (11) and an arc groove (12) that match the protrusion (9) inside. An arc block (13) is fixedly connected to one side of the arc groove (12).

2. The optical inspection device for PCB boards according to claim 1, characterized in that: The top of the fixed rod (10) is fixedly connected to the detection table (5), and limit blocks (14) are fixedly connected to both sides of the detection table (5).

3. The optical inspection device for PCB boards according to claim 2, characterized in that: The machine body (1) has a sliding groove inside that matches the limiting block (14), and the outer side of the limiting block (14) is slidably connected to the sliding groove by a ball bearing. The top of the detection table (5) is movably connected to a gear (15) by a rotating shaft.

4. The optical inspection device for PCB boards according to claim 3, characterized in that: A placement plate (16) is fixedly connected to the top of the gear (15), and a rack plate (17) matching the gear (15) is fixedly connected to the inner side of the body (1).

5. The optical inspection device for PCB boards according to claim 1, characterized in that: An electric push rod (18) is fixed to the bottom of the bracket (2), and a connecting frame (19) is fixedly connected to the bottom of the electric push rod (18). A baffle (20) is movably connected to the bottom of the connecting frame (19) via a rotating shaft.

6. The optical inspection device for PCB boards according to claim 5, characterized in that: A second motor (21) is mounted on one side of the machine body (1) via a mounting bracket, and a transmission roller (22) is fixedly connected to the output end of the second motor (21).

7. The optical inspection device for PCB boards according to claim 6, characterized in that: A conveyor belt (23) is sleeved on the outside of the transmission roller (22), and a sponge pad (24) is fixedly connected to the outside of the conveyor belt (23). One side of the transmission roller (22) is movably connected to the machine body (1) through a bearing.

Images