A jig for soft board line width automatic detection

Abstract

This utility model discloses a fixture for automatic linewidth detection of flexible printed circuit boards (PCBs), comprising a housing. The top of the housing has symmetrically fixed posts, and a ring-shaped mounting frame is fixedly mounted on one side of the two posts. A ring-shaped LED light strip is fixedly mounted on the inner wall of the ring-shaped mounting frame. A mounting bracket is fixedly mounted on the top of the ring-shaped mounting frame, and an industrial camera is fixedly mounted at the bottom and center of the mounting bracket. The interior of the housing is hollow, and a vacuum pump is fixedly mounted on the front side of the housing. Several ventilation holes are opened on the top of the housing, and the air inlet of the vacuum pump is connected to the interior of the housing. This utility model uses a motor to drive a bidirectional lead screw to rotate, which in turn drives a sealing plate to cover or open the ventilation holes according to the size of the flexible printed circuit board. This ensures that the flexible printed circuit board perfectly covers the ventilation holes while maintaining a multi-point uniform adsorption effect, guaranteeing that the flexible printed circuit board is uniformly and flatly adsorbed onto the platform surface.

Description

Technical Field

[0001] This utility model relates to an automatic detection fixture, specifically a fixture for automatic detection of line width on flexible printed circuit boards. Background Technology

[0002] Flexible circuit board (FPC) linewidth refers to the width of the conductive lines used to transmit electrical signals on a flexible circuit board, also known as "wires" or "traces". Linewidth is one of the most important parameters in FPC design, as it directly determines the performance and reliability of the circuit. For example, power lines typically carry a larger current, so they require a wider linewidth; while signal lines carry a smaller current, so they can use a thinner linewidth.

[0003] Currently, most existing fixtures for detecting the linewidth of flexible printed circuit boards (FPCBs) use a vacuum pump to extract air and adsorb the FPCBs. However, the number of adsorption points is often limited and cannot be adjusted according to the size of the FPCB. Therefore, this application proposes a fixture for automatic detection of FPCB linewidth to solve this problem. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for automatic detection of line width of flexible circuit boards, so as to solve the problem mentioned in the background art that most existing fixtures for detecting the line width of flexible circuit boards use a vacuum pump to extract air to adsorb the flexible circuit board, but the adsorption points are often few and the adsorption points cannot be adjusted according to the size of the flexible circuit board.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A fixture for automatic linewidth detection of flexible printed circuit boards includes a housing. The top of the housing has symmetrically fixed posts. A ring-shaped mounting frame is fixedly mounted on one side of the two posts, close to each other. A ring-shaped LED light strip is fixedly mounted on the inner wall of the ring-shaped mounting frame. A mounting bracket is fixedly mounted on the top of the ring-shaped mounting frame. An industrial camera is fixedly mounted at the bottom and center of the mounting bracket. The interior of the housing is hollow. A vacuum pump is fixedly mounted on the front of the housing. Several ventilation holes are opened on the top of the housing. The air inlet of the vacuum pump communicates with the interior of the housing. A controller is fixedly mounted on the housing. Two indicator lights are fixedly mounted on the top of the housing.

[0007] As a further embodiment of this utility model: a motor is fixedly installed on one side of the box, and a bidirectional lead screw is fixedly installed on the output shaft of the motor. Slide plates are threadedly connected to the positive and negative threads of the bidirectional lead screw. A sliding groove is fixedly installed on the inner bottom side of the box. Both slide plates are slidably connected to the sliding groove. A sealing plate is fixedly installed on the top of both slide plates. The two sealing plates extend out of the box and are slidably connected to the box on the side that is far away from each other. The top of the sealing plate is in contact with the inner top side of the box.

[0008] As a further improvement of this utility model, one end of the bidirectional lead screw is rotatably connected to the housing.

[0009] As a further improvement of this utility model, the sealing plate is made of a wear-resistant material.

[0010] As a further improvement of this utility model: the motor, vacuum pump and indicator light are all electrically connected to the controller via wires, and the controller is electrically connected to an external power supply via wires.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model uses a motor to drive a bidirectional lead screw to rotate, which in turn drives a sealing plate to cover or open the vent holes according to the size of the flexible circuit board. This ensures that the flexible circuit board can perfectly cover the vent holes while maintaining a multi-point uniform adsorption effect, thus ensuring that the flexible circuit board is evenly and flatly adsorbed on the platform surface.

[0013] 2. This utility model enhances the contrast between the circuit board and the substrate by using a ring-shaped LED light strip to suppress reflections from the metal circuit board. It then uses an industrial camera to take pictures and compares the data with preset values, thereby achieving the effect of automatically detecting the line width of the flexible circuit board. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a partial sectional view of the present invention.

[0016] Figure 3 This utility model Figure 1 Enlarged view of point A in the middle.

[0017] 1. Fixed column; 2. Mounting bracket; 3. Ventilation hole; 4. Sealing plate; 5. Indicator light; 6. Controller; 7. Housing; 8. Vacuum pump; 9. Motor; 10. Slide plate; 11. Slide groove; 12. Two-way lead screw; 13. Industrial camera; 14. Circular LED light strip; 15. Circular mounting frame. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-3In this embodiment of the utility model, a fixture for automatic detection of line width of flexible printed circuit boards includes a housing 7. A fixing column 1 is symmetrically fixedly installed on the top of the housing 7. An annular mounting frame 15 is fixedly installed on one side of the two fixing columns 1 that are close to each other. An annular LED light strip 14 is fixedly installed on the inner wall of the annular mounting frame 15. A mounting bracket 2 is fixedly installed on the top of the annular mounting frame 15. An industrial camera 13 is fixedly installed at the bottom and in the middle of the mounting bracket 2. The interior of the housing 7 is hollow. A vacuum pump 8 is fixedly installed on the front side of the housing 7. Several ventilation holes 3 are opened on the top of the housing 7. The air inlet of the vacuum pump 8 communicates with the interior of the housing 7. A controller 6 is fixedly installed on the housing 7. Two indicator lights 5 are fixedly installed on the top of the housing 7.

[0020] A motor 9 is fixedly installed on one side of the housing 7. A two-way lead screw 12 is fixedly installed on the output shaft of the motor 9. A sliding plate 10 is threaded to both the positive and negative threads of the two-way lead screw 12. A sliding groove 11 is fixedly installed on the bottom inside of the housing 7. Both sliding plates 10 are slidably connected to the sliding groove 11. A sealing plate 4 is fixedly installed on the top of both sliding plates 10. The two sealing plates 4 extend out of the housing 7 on the side furthest from each other and are slidably connected to the housing 7. The top of the sealing plate 4 is in contact with the top inside of the housing 7.

[0021] One end of the bidirectional lead screw 12 is rotatably connected to the housing 7.

[0022] The sealing plate 4 is made of wear-resistant material.

[0023] The motor 9, vacuum pump 8, and indicator light 5 are all electrically connected to the controller 6 via wires, and the controller 6 is electrically connected to an external power supply via wires.

[0024] The working principle of this utility model is as follows:

[0025] In use, the motor 9 is started according to the size of the flexible circuit board, driving the bidirectional lead screw 12 to rotate. During the rotation of the bidirectional lead screw 12, the two slide plates 10 move closer or further apart under the guidance of the slide groove 11, placing the flexible circuit board on top of the housing 7 until the flexible circuit board can completely cover the remaining vent holes 3. Then, the vacuum pump 8 is started to extract the air from inside the housing 7. The multi-point adsorption method can evenly distribute the adsorption force across the entire bottom surface of the workpiece, effectively suppressing the micro-warping and deformation of the flexible circuit board. The annular LED light strip 14 inside the annular mounting frame 15 is then activated to enhance the adhesion between the circuit and the substrate. The industrial camera 13, in conjunction with the ring LED light strip 14, takes pictures of the preset detection area of ​​the flexible circuit board, and acquires high-resolution digital images. The acquired image data is transmitted to the controller 6. The controller 6 automatically compares the calculated actual line width value with the preset tolerance range. If the line width value of all detection points is within the tolerance range, the product is judged to be qualified. If the line width value of any detection point exceeds the tolerance range, the product is judged to be unqualified. When the product is qualified, one indicator light 5 lights up. When the product is unqualified, the other indicator light 5 lights up.

[0026] 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. A fixture for automatic detection of linewidth on flexible printed circuit boards, comprising a housing (7), characterized in that: The top of the box (7) is symmetrically fixed with fixed columns (1), and the two fixed columns (1) are fixedly fixed with a ring mounting frame (15) on the side close to each other. A ring LED light strip (14) is fixedly installed on the inner wall of the ring mounting frame (15). A mounting bracket (2) is fixedly installed on the top of the ring mounting frame (15). An industrial camera (13) is fixedly installed at the bottom and in the middle of the mounting bracket (2). The inside of the box (7) is hollow. A vacuum pump (8) is fixedly installed on the front side of the box (7). Several ventilation holes (3) are opened on the top of the box (7). The air inlet of the vacuum pump (8) is connected to the inside of the box (7). A controller (6) is fixedly installed on the box (7). Two indicator lights (5) are fixedly installed on the top of the box (7).

2. The fixture for automatic linewidth detection of flexible printed circuit boards according to claim 1, characterized in that: A motor (9) is fixedly installed on one side of the housing (7). A two-way lead screw (12) is fixedly installed on the output shaft of the motor (9). A sliding plate (10) is threaded to both the positive and negative threads of the two-way lead screw (12). A sliding groove (11) is fixedly installed on the bottom inside of the housing (7). Both sliding plates (10) are slidably connected to the sliding groove (11). A sealing plate (4) is fixedly installed on the top of both sliding plates (10). The two sealing plates (4) extend out of the housing (7) on the side away from each other and are slidably connected to the housing (7). The top of the sealing plate (4) is in contact with the top inside of the housing (7).

3. The fixture for automatic linewidth detection of flexible printed circuit boards according to claim 2, characterized in that: One end of the bidirectional lead screw (12) is rotatably connected to the housing (7).

4. A fixture for automatic linewidth detection of flexible printed circuit boards according to claim 2, characterized in that: The sealing plate (4) is made of wear-resistant material.

5. A fixture for automatic linewidth detection of flexible printed circuit boards according to claim 2, characterized in that: The motor (9), vacuum pump (8) and indicator light (5) are all electrically connected to the controller (6) via wires, and the controller (6) is electrically connected to an external power source via wires.

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