A PCB board width detection mechanism

Abstract

This utility model relates to the field of PCB board inspection technology and discloses a PCB board width inspection mechanism, including an equipment frame. Two sets of equipment frames are fixedly connected to the inner sides of the two sets of equipment frames. A grating ruler is mounted on the top of the connecting frame, and a second motor is installed inside the connecting frame. A second synchronous belt assembly is installed at the output end of the second motor. This avoids "missed inspections" or "repeated inspections." The core transmission components (synchronous belt assembly one and synchronous belt assembly two) and guide components (guide rails and sliding parts) of the mechanism adopt standardized designs, ensuring strong component versatility and convenient replacement and maintenance. Furthermore, each drive component (motor one, motor two, cylinder one, cylinder two) and the inspection component (grating ruler) are independent of each other, making fault diagnosis easier. Basic maintenance can be completed without professional technicians, further reducing the company's later operating costs and ensuring the long-term stable operation of the mechanism.

Description

Technical Field

[0001] This utility model relates to the field of PCB board inspection technology, specifically a PCB board width inspection mechanism. Background Technology

[0002] As the supporting carrier of electronic components and the core of circuit connection, the dimensional accuracy of PCB (Printed Circuit Board) directly determines the assembly compatibility and operational stability of electronic equipment. Among them, the board width is a key indicator that needs to be strictly controlled in the PCB production process. Excessive deviation in board width can lead to misalignment of component soldering, board installation jamming, and even interference in circuit signal transmission.

[0003] However, in actual operation, the inventors found that the following problems still exist: There are two main ways to detect the width of PCB boards under the existing technology: one is to measure manually with calipers, which is inefficient, labor-intensive, and easily affected by human operation errors, resulting in unstable detection accuracy; the other is to use complex vision inspection equipment, which has high accuracy, but the equipment is expensive and difficult to debug, making it unsuitable for batch inspection scenarios of small and medium-sized PCB manufacturing enterprises. The laser displacement sensor method is used for detection, which has unstable detection accuracy and large offset.

[0004] Based on this, the present invention provides a PCB board width detection mechanism. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a PCB board width detection mechanism, which has the advantage of rapidly detecting board width using a grating ruler, thus solving the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: a PCB board width detection mechanism, including a device frame, wherein there are two sets of device frames, and a connecting frame is fixedly connected to the inner side of the two sets of device frames. A grating ruler is installed on the top of the connecting frame, and a second motor is installed inside the connecting frame. A second synchronous belt assembly is installed at the output end of the second motor. Two sets of L-shaped linkage components are installed on the outer side of the pulley of the second synchronous belt assembly. A bearing component is fixedly connected to the side of each of the two sets of L-shaped linkage components. A connecting beam is fixedly connected to the top of the bearing component. Several abutting components are provided on the top of the connecting beam, and an optical fiber structure is provided between the abutting components.

[0007] Preferably, the top of the connecting frame is also equipped with a guide rail, and a sliding member is slidably connected to the surface of the guide rail. The top of the sliding member is fixedly connected to the bottom of the bearing member.

[0008] Preferably, a motor is installed on the inner side of the equipment frame, and a synchronous belt assembly is driven to the output end of the motor. A connecting shaft is driven to the inner side of the synchronous belt assembly, and a conveying roller is fixedly sleeved on the side of the connecting shaft.

[0009] Preferably, a layout sensor is provided on the side of the device frame, and the sensing direction of the layout sensor is towards the conveying path of the PCB board.

[0010] Preferably, a cylinder is also installed on the inner side of the equipment frame, and a mounting component is fixedly connected to the bottom end of the piston rod of the cylinder. A lower pressure roller is rotatably connected to the inner side of the mounting component through a bearing.

[0011] Preferably, a second cylinder is also installed on the inner side of the equipment frame, and a second mounting piece is fixedly connected to the bottom end of the piston rod of the second cylinder, and a limit plate is fixedly connected to the inner side of the second mounting piece.

[0012] Preferably, the second synchronous belt assembly includes a driving pulley, a driven pulley, and a synchronous belt wound around the outside of both. The driving pulley is fixedly connected to the output end of the second motor. The two sets of L-shaped linkages are respectively fixed to the outside of the two side sections of the synchronous belt, and the two sets of L-shaped linkages are symmetrically distributed.

[0013] Preferably, a plurality of the abutting members are evenly spaced along the length of the connecting beam, and the abutting members are made of a hard and wear-resistant material.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This solution uses a grating ruler as the core inspection component, avoiding the problems of low efficiency, high labor intensity, and significant human error associated with manual caliper measurement. It also eliminates the need for complex and expensive visual inspection equipment, effectively reducing equipment procurement and debugging costs. Its simple structural design, mature and stable core inspection component (grating ruler), and low debugging difficulty make it perfectly suited for batch inspection scenarios in small and medium-sized PCB manufacturing enterprises. It achieves a balance between high-precision inspection and low-cost application, filling the gap in cost-effectiveness among existing inspection solutions. This solution integrates a fully automated design encompassing automatic conveying, precise positioning, and stable inspection: automatic PCB board conveying is achieved through a motor driving a synchronous belt assembly and conveyor rollers. It replaces manual feeding; the layout sensor can identify the PCB board's conveying position in real time, accurately triggering the inspection process and avoiding the time wasted on manual alignment; Motor 2 drives Synchronous Belt Assembly 2 and L-shaped linkage components, driving two sets of abutment components to move synchronously along the guide rail, quickly completing the clamping of the PCB board width and the detection of the grating ruler. The entire process requires no manual intervention, significantly shortening the inspection cycle of a single PCB board and meeting the high-efficiency inspection requirements of mass production; On the one hand, Synchronous Belt Assembly 2 adopts a design of "active pulley + driven pulley + symmetrically distributed L-shaped linkage components", ensuring that the two sets of abutment components always move synchronously in opposite or the same direction, ensuring consistent clamping / alignment of the PCB board during inspection; At the same time, the cooperation structure between the sliding component and the guide rail This design restricts the movement trajectory of the carrier and the abutment, preventing alignment deviations caused by component shaking during inspection. On the other hand, the lower pressure roller driven by cylinder one provides stable pressure on the PCB board during transport, while the limiting plate driven by cylinder two restricts board offset from the side. This dual-fixing structure effectively prevents the PCB board from shifting or tilting during transport or inspection, providing a stable inspection environment for the grating ruler and further reducing inspection errors caused by board shaking, ensuring the repeatability and accuracy of board width inspection data. Several abutment components evenly distributed along the connecting beam are made of hard, wear-resistant material, which can accommodate PCB boards of different lengths (by using multiple sets of abutment components to evenly contact the sides of the board, avoiding board deformation caused by localized stress). The design is robust and can withstand frictional wear during long-term batch testing, extending component lifespan. Simultaneously, the sensing direction of the layout sensor precisely points along the PCB board conveying path, enabling real-time identification of board position and triggering of detection actions, avoiding missed or duplicate detections. The core transmission components (synchronous belt assembly one and synchronous belt assembly two) and guide components (guide rails and sliding parts) all adopt standardized designs, ensuring high component versatility and convenient replacement and maintenance. Furthermore, each drive component (motor one, motor two, cylinder one, and cylinder two) is independent of the detection component (grating ruler), reducing the difficulty of troubleshooting and allowing basic maintenance to be completed without specialized technicians, further reducing the company's long-term operating costs and ensuring the long-term stable operation of the mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure on the right side of this utility model;

[0018] Figure 3 This is a schematic diagram of the connection structure between the motor and the synchronous belt assembly of this utility model.

[0019] Figure 4 This is a schematic diagram of the connection structure between the grating ruler and the connecting frame of this utility model;

[0020] Figure 5 This is a schematic diagram showing the connection state between the second motor and the second synchronous belt assembly of this utility model.

[0021] In the picture:

[0022] 1. Equipment frame;

[0023] 2. Layout sensor;

[0024] 3. Grating ruler;

[0025] 4. Motor 1; 401. Synchronous Belt Assembly 1;

[0026] 5. Connecting frame; 501. Guide rail; 502. Sliding component; 503. Bearing component; 504. Connecting crossbeam; 505. Abutment component; 506. Motor II; 507. Synchronous belt assembly II; 508. L-shaped linkage component;

[0027] 6. Connecting shaft;

[0028] 7. Conveyor rollers;

[0029] 8. Cylinder 1; 801. Mounting component 1; 802. Lower pressure roller;

[0030] 9. Cylinder 2; 901. Mounting Part 2; 902. Limiting Plate;

[0031] 10. Fiber optic structure. Detailed Implementation

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Please see Figure 1-5A PCB board width detection mechanism includes a device frame 1, which consists of two sets. A connecting frame 5 is fixedly connected to the inner side of the two sets of device frames 1. A grating ruler 3 is installed on the top of the connecting frame 5. A second motor 506 is installed inside the connecting frame 5. A second synchronous belt assembly 507 is installed at the output end of the second motor 506. Two sets of L-shaped linkage components 508 are installed on the outer side of the pulley of the second synchronous belt assembly 507. A bearing component 503 is fixedly connected to the side of the two sets of L-shaped linkage components 508 respectively. A connecting beam 504 is fixedly connected to the top of the bearing component 503. Several abutment components 505 are provided on the top of the connecting beam 504. An optical fiber structure 10 is provided between the abutment components 505. The optical fiber structure 10 is installed on the device frame 1 and is located between the two sets of abutment components 505 in the middle.

[0034] Specifically, the two sets of equipment frames 1 form the overall support skeleton of the mechanism through the connecting frame 5, providing a stable installation reference for all functional components such as the grating ruler 3 and motor 506. When the plate width detection process is started, motor 506 is powered on and its output end transmits power to synchronous belt assembly 507, driving the pulley of synchronous belt assembly 507 to rotate cyclically with the synchronous belt. The two sets of L-shaped linkages 508 fixed on the outside of the pulley of synchronous belt assembly 507 move with the synchronous belt, thereby driving the two sets of bearing members 503 fixed therewith to move synchronously. The bearing members 503 drive the top connecting beam 504 and the several [unclear text - possibly related to a specific component or component] on the connecting beam 504 to move synchronously. The dry contact piece 505 approaches the PCB board until it is in contact with both sides of the PCB board. At this time, the grating ruler 3 at the top of the connecting frame 5 detects the distance between the two sets of contact pieces 505. This distance is the actual width of the PCB board. The fiber optic structure 10 has the effect of deceleration and positioning, which can effectively prevent the PCB board from being squeezed and damaged due to excessive speed or overshoot. The fiber optic structure 10 is used in conjunction with the grating ruler 3 to improve the measurement efficiency of the PCB board width. The fiber optic structure 10 is specifically a position sensor component based on the fiber optic sensing principle, specifically the Baumer O500 series fiber optic sensor.

[0035] Using the grating ruler 3 as the core detection element, it avoids the problems of low efficiency, high labor intensity, and large human error associated with manual caliper measurement, and eliminates the need to rely on expensive visual inspection equipment. It balances detection accuracy and cost, and is suitable for the batch inspection needs of small and medium-sized PCB manufacturers. Through the transmission chain of motor 2 506 - synchronous belt assembly 2 507 - L-shaped linkage 508, the automatic movement of the abutment 505 and the clamping of the board width are realized, laying the foundation for subsequent automated inspection and reducing manual intervention. The synchronous action of the two sets of abutment 505 ensures uniform clamping force on the PCB board, avoids deformation of the board due to uneven force, and ensures the accuracy of the detection data of the grating ruler 3.

[0036] The top of the connecting frame 5 is also equipped with a guide rail 501, and a sliding member 502 is slidably connected to the surface of the guide rail 501. The top of the sliding member 502 is fixedly connected to the bottom of the bearing member 503.

[0037] Specifically, when the motor 506 drives the carrier 503 to move, the sliding member 502 fixed at the bottom of the carrier 503 will slide linearly along the guide rail 501 at the top of the connecting frame 5. The guide rail 501 forms a rigid constraint on the movement trajectory of the sliding member 502, limiting the displacement of the sliding member 502 in the direction perpendicular to the length of the guide rail.

[0038] By cooperating with the guide rail 501 and the sliding member 502, the movement direction of the bearing member 503, the connecting beam 504 and the abutment member 505 is precisely limited, avoiding the misalignment of the abutment member 505 caused by component shaking during the inspection process, thus improving the stability of board width inspection; and preventing the abutment member 505 from misaligning and colliding with the side of the PCB board due to trajectory deviation, thus protecting the PCB board from damage and reducing product loss during the inspection process.

[0039] Among them, a motor 4 is installed on the inner side of the equipment frame 1, and a synchronous belt assembly 401 is driven to the output end of the motor 4. A connecting shaft 6 is driven to the inner side of the synchronous belt assembly 401, and a conveying roller 7 is fixedly sleeved on the side of the connecting shaft 6.

[0040] Specifically, when the PCB board conveying process is started, motor 4 is powered on and its output end transmits power to synchronous belt assembly 401, driving the synchronous belt of synchronous belt assembly 401 to rotate cyclically; synchronous belt assembly 401 is connected to connecting shaft 6, and the movement of synchronous belt drives connecting shaft 6 to rotate around its own axis; conveyor roller 7, which is fixedly sleeved on the side of connecting shaft 6, rotates synchronously with connecting shaft 6, and PCB board is placed on the surface of conveyor roller 7. Through the friction between conveyor roller 7 and PCB board, PCB board is driven to move along the preset conveying path until it reaches the inspection station.

[0041] The system enables automated PCB board feeding, replacing traditional manual loading methods, significantly reducing labor intensity and improving feeding efficiency, and adapting to the continuous inspection needs of batch PCB boards. The transmission structure of motor-4-synchronous belt assembly-401-connecting shaft 6 is stable, and the rotation speed of conveyor roller 7 can be controlled by adjusting the speed of motor-4, thereby precisely controlling the conveying rhythm of the PCB boards and coordinating with subsequent inspection processes such as layout sensing and board width detection. The conveyor roller 7 provides uniform support area for the PCB boards, avoiding bending deformation caused by localized stress during the conveying process, ensuring that the PCB boards enter the inspection station in a flat state, and reducing the impact of board deformation on inspection accuracy.

[0042] The equipment frame 1 has a layout sensor 2 on its side, and the layout sensor 2 is directed toward the conveying path of the PCB board.

[0043] Specifically, after the layout sensor 2 is powered on, it is in a real-time sensing state, and its sensing area covers the conveying path of the PCB board. When the PCB board moves to the sensing area of ​​the layout sensor 2 along with the conveying roller 7, the layout sensor 2 receives the occlusion signal or reflection signal of the PCB board and transmits the signal to the control system of the mechanism. The control system determines that the PCB board has reached the preset detection position based on the signal of the layout sensor 2, and then triggers subsequent actions such as the cylinder 8 driving the lower roller 802 to press and the motor 506 driving the abutment 505 to clamp and detect. When the PCB board is detected and leaves the sensing area, the signal of the layout sensor 2 disappears, and the control system prepares to receive the sensing signal of the next PCB board, realizing the continuous detection process connection.

[0044] The layout sensing element 2 is a photoelectric sensor in the prior art, model Omron E3Z-D61 (through-beam type).

[0045] It accurately identifies the position of the PCB board, avoiding the waste of time in manual alignment, and ensures that the inspection process starts automatically after the PCB board arrives at the designated position, thus improving inspection efficiency; it prevents "missed inspections" caused by deviations in the PCB board's transport position (initiating inspection before the PCB board has arrived at the inspection position) or "repeated inspections" (restarting inspection repeatedly before the PCB board has left the inspection position), ensuring the integrity and uniqueness of the inspection results; as a "trigger switch" for the inspection process, it realizes the automated linkage between transport and inspection, reduces manual intervention, and lowers the probability of human error.

[0046] The inner side of the equipment frame 1 is also equipped with a cylinder 8. The bottom end of the piston rod of the cylinder 8 is fixedly connected to a mounting part 801. The inner side of the mounting part 801 is rotatably connected to a lower pressure roller 802 through a bearing.

[0047] Specifically, the piston rod of cylinder 8 extends downward, causing the mounting component 801 at the bottom to move downward synchronously. The lower pressure roller 802 inside the mounting component 801 moves downward accordingly until the surface of the lower pressure roller 802 is in close contact with the upper surface of the PCB board, forming a vertical pressing force on the PCB board. During the continued conveying or inspection of the PCB board, the lower pressure roller 802 rotates around its own axis through the bearing due to the friction between it and the PCB board surface, maintaining the pressing state on the PCB board without hindering its movement. After the inspection is completed, the piston rod of cylinder 8 retracts upward, causing the lower pressure roller 802 to leave the PCB board and releasing the PCB board for subsequent conveying.

[0048] The PCB board is held vertically and stably to prevent it from shifting upwards or tilting during transport or inspection due to vibration or the clamping force of the contact piece 505. This ensures the PCB board remains horizontal and provides a stable inspection environment for the grating ruler 3. The lower pressure roller 802 is connected to the PCB board via a bearing and can rotate synchronously with it, avoiding sliding friction with the PCB board surface and protecting the circuitry or coating from scratches, thus reducing product loss. The cylinder-driven method provides fast response and stable and controllable holding force. The air pressure of cylinder 8 can be adjusted according to the PCB board thickness to meet the inspection needs of various PCB board specifications.

[0049] The inner side of the equipment frame 1 is also equipped with a cylinder 2 9. The bottom end of the piston rod of the cylinder 2 9 is fixedly connected to the mounting part 2 901, and the inner side of the mounting part 2 901 is fixedly connected to the limit plate 902.

[0050] Specifically, before the PCB board arrives at the inspection station or simultaneously with the pressing action of the lower roller 802, the piston rod of cylinder 2 9 extends laterally perpendicular to the PCB board conveying direction; the piston rod drives mounting component 2 901 and the limiting plate 902 inside mounting component 2 901 to move towards the side of the PCB board until the limiting plate 902 is tightly attached to the side of the PCB board; the limiting plate 902 restricts the PCB board's lateral displacement by abutting against the side, ensuring that the center line of the PCB board is aligned with the baseline of the inspection mechanism; after inspection, the piston rod of cylinder 2 9 retracts, driving the limiting plate 902 away from the side of the PCB board, releasing the PCB board for subsequent conveying.

[0051] The PCB board is limited in the lateral direction, forming a "vertical + lateral" double fixing structure with the lower pressure roller 802 of cylinder 8, which completely prevents the PCB board from moving, shifting or tilting during the inspection process, and further reduces the inspection error caused by the board position deviation; the position of the limiting plate 902 can be adjusted by the extension and retraction of the piston rod of cylinder 9, which can be adapted to PCB boards of different widths and improve the versatility of the mechanism; the cylinder-driven limiting method is precise and responsive, and can be coordinated with the actions of the layout sensor 2, motor 506 and other components to ensure that the PCB board has been accurately positioned before inspection.

[0052] Among them, the timing belt assembly 507 includes a driving pulley, a driven pulley, and a timing belt wound around the outside of the two. The driving pulley is fixedly connected to the output end of the motor 506. Two sets of L-shaped linkages 508 are fixed on the outside of the two sides of the timing belt, and the two sets of L-shaped linkages 508 are symmetrically distributed.

[0053] Among them, the abutment parts 505 are evenly distributed along the length direction of the connecting beam 504, and the abutment parts 505 are made of hard wear-resistant material.

[0054] The use of hard and wear-resistant materials extends the service life of the abutment 505, reduces detection errors caused by wear of the abutment 505 such as clamping position shift after wear, and reduces the frequency of component replacement, thus reducing the maintenance costs for enterprises. The multi-point contact clamping method further improves the stability of the PCB board during the detection process, avoids board shaking caused by uneven force due to single-point contact, and provides a guarantee for the accurate detection of the grating ruler 3.

[0055] 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. A PCB board width detection mechanism, characterized in that, The device includes a frame (1), which consists of two sets. A connecting frame (5) is fixedly connected to the inner side of each set of the frame (1). A grating ruler (3) is installed on the top of the connecting frame (5). A motor (506) is installed inside the connecting frame (5). A synchronous belt assembly (507) is installed at the output end of the motor (506). Two sets of L-shaped linkages (508) are installed on the outer side of the pulley of the synchronous belt assembly (507). A bearing (503) is fixedly connected to the side of each set of L-shaped linkages (508). A connecting beam (504) is fixedly connected to the top of the bearing (503). Several abutting parts (505) are provided on the top of the connecting beam (504). An optical fiber structure (10) is provided between the abutting parts (505).

2. The PCB board width detection mechanism according to claim 1, characterized in that: The top of the connecting frame (5) is also equipped with a guide rail (501), and a sliding member (502) is slidably connected to the surface of the guide rail (501). The top of the sliding member (502) is fixedly connected to the bottom of the bearing member (503).

3. The PCB board width detection mechanism according to claim 1, characterized in that: The inner side of the equipment frame (1) is equipped with a motor (4), the output end of the motor (4) is connected to a synchronous belt assembly (401), the inner side of the synchronous belt assembly (401) is connected to a connecting shaft (6), and the side of the connecting shaft (6) is fixedly fitted with a conveying roller (7).

4. The PCB board width detection mechanism according to claim 1, characterized in that: The side of the equipment frame (1) is provided with a layout sensor (2), and the sensing direction of the layout sensor (2) is towards the conveying path of the PCB board.

5. The PCB board width detection mechanism according to claim 1, characterized in that: The inner side of the equipment frame (1) is also equipped with a cylinder (8), and the bottom end of the piston rod of the cylinder (8) is fixedly connected to a mounting part (801). The inner side of the mounting part (801) is rotatably connected to a lower pressure roller (802) through a bearing.

6. The PCB board width detection mechanism according to claim 1, characterized in that: The inner side of the equipment frame (1) is also equipped with a cylinder two (9), and the bottom end of the piston rod of the cylinder two (9) is fixedly connected to a mounting part two (901), and the inner side of the mounting part two (901) is fixedly connected to a limit plate (902).

7. The PCB board width detection mechanism according to claim 1, characterized in that: The second synchronous belt assembly (507) includes a driving pulley, a driven pulley, and a synchronous belt wound around the outside of both. The driving pulley is fixedly connected to the output end of the second motor (506). Two sets of L-shaped linkages (508) are fixed on the outside of the two sides of the synchronous belt, and the two sets of L-shaped linkages (508) are symmetrically distributed.

8. The PCB board width detection mechanism according to claim 1, characterized in that: Several of the abutment members (505) are evenly spaced along the length of the connecting beam (504), and the abutment members (505) are made of hard wear-resistant material.

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