The present disclosure claims the benefit of Chinese Patent Application No. 202110458490.X entitled “Test Device and Method for Roll-to-Roll Board of Flexible Circuit Board,” filed on Apr. 26, 2021, in the China National Intellectual Property Administration, the entire content of which is incorporated herein in its entirety.
The present disclosure relates to a technical filed of flexible circuit board manufacturing equipment, in particular to testing device and method of roll-to-roll boards.
The difference between flexible circuit boards and traditional PCB circuit board is that the flexible circuit board is light-weight, flexible, and does not require additional wiring time. It needs to be inspected after the preparation is completed. Most of the current inspection methods used are through visual inspection. However, as the complexity of circuit boards increases, inspection of the surface alone cannot meet the needs of most companies today.
Based on the above description, the inventor found that the existing flexible circuit board roll-to-roll board testing device and method mainly have the following shortcomings, for example:
1. when fixing the circuit board, the prior art only fixes the circuit board on a flat surface. However, because the flexible circuit board has a certain degree of foldability, it is difficult to ensure that each surface is in a horizontal state when inspecting it, which is extremely easy Because it is not spread out, the detection position is not accurate, and it is easy to miss the short-circuit and open-circuit points.
2. the flexible circuit board needs to be fixed in a fixed position during inspection by the inspector, and the fixed position needs to be accurate, which is a waste of time.
3. in the prior art, when a defective pixel on the circuit board is detected, there is no way to correct it to eliminate the deviation, and it can only simply detect the defective pixel.
In order to solve the above technical problems, the present disclosure provides a flexible circuit board roll-to-roll board testing device and method to solve the existing problems.
The present disclosure is achieved by a test device and a method for roll-to-roll board of flexible circuit boards. The test device comprises a detection probe frame, front and rear ends of the detection probe frame being connected to a sliding frame, and a bottom of the sliding frame being connected to a magnetic plate; wherein the magnetic plate is consisted of a square panel in the middle and four isosceles trapezoidal panels in upright direction; the four isosceles trapezoidal panels is movable and is capable of being rotated towards the square panel; a bottom of the square panel is provided with 4×4 centralized ports, the angle between the centralized port and a vertical line of the panel is 30°; the upper surface of the magnetic plate is provided with four catching splints, the catching splint is movable on the magnetic plate, and there is a magnetic relationship between the catching splint and the magnetic plate; a pulling force of the catching splint is 50 N-980 N; the catching splint comprises a buckle frame; the buckle frame is welded with two side lifting plates; a bottom of the side lifting plate is a right-angled triangle with an apex angle of 15°, and a square slot is connected to the side lifting plate. A depth of the square slot is 5 cm; a top of the square slot is a right-angle trapezoid; one side of an oblique side of side lifting plate faces outward and a vertical positioning pin is connected inside.
In some embodiments, inner side nails of the two side lifting plates are connected to corner fixing clips; a section of the corner fixing clip facing the outside is arc-shaped.
In some embodiments, the corner fixing clip comprises a clamping concave plate connected between the two side lifting plates; an inner center of the clamping concave plate is connected to an electromagnetic wheel. The electromagnetic wheel is magnetic, and a supercharger is located within the electromagnetic; increasing the overall voltage in the case of constant resistance, the current is increased and, therefore, the magnetic force of the electromagnetic wheel is increased.
In some embodiments, an inner side of one end of the arc edge of the clamping concave plate is also connected to a corner piece; the inner side of the corner piece has an occlusal head, the occlusal head is an equilateral triangle structure, one of the vertices being used as the fulcrum, and the other two vertices being used as the fulcrum to contact the circuit board.
In some embodiments, the detection probe comprises a clamping portion connected therein; a probe is movably connected to a bottom of the clamping portion, and a movable angle of the top of the probe in the clamping portion is −30° to 30°; a bottom part of the probe is a triangular body, and three downward faces of the probe are all connected with friction hair balls; the friction hair balls are round colloids and have certain flexibility; the top of the clamping portion also comprises an indicator light electrically connected to the probe; the indicator light turns green when the indicator light is energized and transmits current; the indicator light turns gray when the indicator light loses power; the indicator light turns red when the indicator light contacts the circuit and there is no current.
In some embodiments, the density of the probes distributed on the lower surface of the detection probe is 18×11; a total of 198 probes cover all the points on the flexible circuit board; the probes correspond to the number and positions of the clamping portion and the indicator light one by one.
In some embodiments, the clamping portion comprises a clamping cavity connected therein; an upper left corner and an upper right corner of the clamping cavity are respectively connected with a disassembly adjusting arm; the disassembly adjusting arm is capable of being rotated 30° left and right with the inner vertex as the axis, so the left and right ends of the inner side of the clamping cavity also comprise two sets of oscillating heads; the oscillating heads have an oscillator inside which can be controlled to perform periodic reciprocating movements; the disassembly adjusting arm is capable of opening the clamping cavity.
A test method for the test device as described above comprises the following steps:
S1: transmission: providing a processed flexible circuit board without components soldered thereon onto a magnetic board, no need to specify the position, the magnetic board attracts the flexible circuit board to a middle square panel, and central ports in the square panel allows the flexible circuit board to move to the middle position.
S2: positioning: moving the electromagnetic wheel to four corners of the flexible circuit board; if a pattern of the circuit board has multiple branches, a wire board is divided into multiple tests; the lifting board clamps the two sides, and the corner piece clamps the top corner and allows the electromagnetic wheel to expand outward, so that the flexible circuit board is tightened;
S3: judgment: moving the probe down to the copper foil of the flexible circuit board; at this time, the normal copper foil point is formed with the probe and the indicator light; when the circuit is turned on, the indicator light will light up; when the abnormal copper foil is in contact with the probe and the indicator light, the indicator light; no normal current is received, but the pressure signal feedback of the probe touching the copper foil is obtained, and the red fault light is lit up immediately, which is the fault point;
S4: correction: for the location of the fault point, activating the oscillating head to periodically impact the probe, so that the friction hair ball at the bottom of the probe; rubbing the circuit on the copper foil, wipe away the excess oxidation and possible contamination of foreign objects, and stimulating the circuit to make it through the test as much as possible.
S5: marking: when all the indicator lights in a flexible circuit board are all lit green, the entire circuit is on, and the marking mechanism in the detection probe is activated to mark the detection probe; the marked flexible circuit board is a qualified circuit board, and the rest without being marked are unqualified.
The disclosure provides a flexible circuit board roll-to-roll board testing device and method, which has reasonable design and strong functionality, and has the following advantages.
1. When the flexible circuit board reaches the approximate position, use the electromagnetic wheel to move the side pick-up board to fix the three points of one corner of the flexible circuit board, fix the four corners and pull out to make the flexible circuit board It is completely spread out, without any wrinkles and dead corners, it is convenient for the probe to test each circuit line, reducing the existence of short-circuit points and disconnection points.
2. The staff only needs to place the flexible circuit board at any position on the magnetic board. The trapezoidal panels on all sides will rotate along the contact position with the square panel, move the circuit board to the middle position, and move to the square panel in the middle. The airflow ejected by the concentrated hole rushes to the middle, making it in the middle of the magnetic plate, saving the staff time to place it in the middle every time, and has a strong self-positioning ability.
3. When the conduction signal is not detected, the probe will move in the clamping cavity, so that the friction hair ball at the bottom continuously cleans the corresponding points on the circuit board, removes the interference on the top, and corrects the circuit. Dead pixels, reduce or even eliminate external influence factors, so that the circuit can be turned on, and improve the pass rate of the flexible circuit board.
In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show certain embodiments of the present disclosure, and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative work, other related drawings can be obtained based on these drawings.
In the drawings: detection probe frame—20; sliding frame—21; catching splint—22; magnetic plate—23; side lifting plate—220; buckle frame—221, corner fixing clip—222, clamping concave plate—200, corner piece—300, electromagnetic wheel—400, indicator light—50, clamping portion—51, probe—52, clamping cavity—510, disassembly adjusting arm—511, oscillation head—512.
In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of the embodiments. Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.
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The method for the test device as described above comprises the following steps.
S1: transmission: providing a processed flexible circuit board without components soldered thereon onto a magnetic board, no need to specify the position, the magnetic board attracts the flexible circuit board to a middle square panel, and central ports in the square panel allows the flexible circuit board to move to the middle position.
S2: positioning: moving the electromagnetic wheel to four corners of the flexible circuit board; if a pattern of the circuit board has multiple branches, a wire board is divided into multiple tests; the lifting board clamps the two sides, and the corner piece clamps the top corner and allows the electromagnetic wheel to expand outward, so that the flexible circuit board is tightened;
S3: judgment: moving the probe down to the copper foil of the flexible circuit board; at this time, the normal copper foil point is formed with the probe and the indicator light; when the circuit is turned on, the indicator light will light up; when the abnormal copper foil is in contact with the probe and the indicator light, the indicator light; no normal current is received, but the pressure signal feedback of the probe touching the copper foil is obtained, and the red fault light is lit up immediately, which is the fault point;
S4: correction: for the location of the fault point, activating the oscillating head to periodically impact the probe, so that the friction hair ball at the bottom of the probe; rubbing the circuit on the copper foil, wipe away the excess oxidation and possible contamination of foreign objects, and stimulating the circuit to make it through the test as much as possible.
S5: marking: when all the indicator lights in a flexible circuit board are all lit green, the entire circuit is on, and the marking mechanism in the detection probe is activated to mark the detection probe; the marked flexible circuit board is a qualified circuit board, and the rest without being marked are unqualified.
The above are only the preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.
Number | Date | Country | Kind |
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202110458490.X | Apr 2021 | CN | national |