False alarm prevention detection circuit board for flexible circuit board interface

Abstract

The utility model relates to the technical field of circuit detection, in particular to a false alarm prevention detection circuit board for a flexible circuit board interface, which comprises a circuit board main body and a plurality of rows of connecting conductive groups which are arranged on the circuit board main body at intervals in parallel, and each row of connecting conductive group comprises two conductive sheets which are arranged along a straight line at intervals, the two conducting strips are respectively connected with the positive electrode and the negative electrode of the detection power supply. The detection device is ingenious in structural design, can effectively identify good products, defective products and non-placed products, and avoids the problem of inaccurate detection results.

Description

Technical Field

[0001] This utility model relates to the field of circuit testing technology, specifically to a false alarm prevention detection circuit board for flexible circuit board interfaces. Background Technology

[0002] Flexible printed circuit boards (FPCs) are highly reliable and extremely flexible printed circuit boards. The multiple parallel metal lines in a FPC primarily serve to transmit electronic signals. These lines, referred to as "conductive layers" or "connection lines" in FPCs, are made of copper foil or other conductive materials and are used to achieve electrical connections. These connection lines not only provide signal transmission paths within electronic devices but can also be designed in complex layouts to adapt to different application scenarios and space requirements.

[0003] like Figure 1 As shown, after production, flexible circuit boards need to pass a conductivity test to meet the usage requirements. This test involves checking the current between each conductive line on the connection contact of the flexible circuit board to determine whether the product meets the usage requirements. In existing flexible circuit boards, apart from two conductive lines that are connected for grounding, each other conductive line is set up separately to provide signal transmission for a specific circuit inside the electronic device.

[0004] In existing technologies, testing tools are frequently used to perform circuit testing on connected lines, such as Figure 2 The test circuit board shown has several spaced and parallel conductive strips. Each conductive strip has a probe, and one end of each strip is connected to a test power supply via a conductive line, with the positive and negative terminals of the test power supply connected sequentially. When this test circuit board is used to test the aforementioned flexible circuit board, the position of each conductive strip corresponds one-to-one with each conductive line. When two conductive lines come into contact due to an etching error, a complete circuit is formed and electrically connected to the test power supply via the positive and negative terminals. Since two conductive lines on the flexible circuit board are also connected, a short circuit occurs. The excessive current caused by the short circuit indicates an etching error. When there is no etching error, the entire flexible circuit board is connected to the test circuit only through two connected conductive lines, achieving circuit continuity. In this case, the current is normal, and the flexible circuit board is judged to be a qualified product. When no flexible circuit board is placed, there is no connected circuit, resulting in an open circuit, and no current can be detected, indicating that the flexible circuit board is not placed.

[0005] However, the above testing process is only effective when there are two conductive lines connected on the flexible circuit board. Some flexible circuit boards do not require this grounding circuit. In this case, all conductive lines in the flexible circuit board are set up independently. Under the condition of a good product, they cannot form a closed-loop circuit with the test probe. That is, the current detected at this time is an open circuit. When the test fixture does not place the test product on it due to human error, the current detected is also an open circuit. This will cause many deviations in the test results, and it will be impossible to determine whether the test result of an open circuit is a good product or the product to be tested was not placed.

[0006] In view of this, the applicant has developed a utility model of a flexible circuit board interface anti-false alarm detection circuit board with an ingenious structural design that can effectively identify various situations such as good products, defective products, and no products placed. Utility Model Content

[0007] The purpose of this invention is to provide a false alarm detection circuit board for flexible circuit board interfaces to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A false alarm detection circuit board for a flexible circuit board interface includes a circuit board body and several rows of spaced and parallel connecting conductive groups disposed on the circuit board body. Each row of connecting conductive groups includes two conductive plates disposed along a straight line and spaced apart. The two conductive plates are respectively connected to the positive and negative terminals of the detection power supply.

[0010] As a further improvement, the spacing between each group of connected conductive groups is defined as d, and the spacing between each conductive line on the connection contact end of the flexible circuit board is defined as l, wherein the values ​​of d and l are set to be compatible.

[0011] As a further improvement, the values ​​of d and l range from 0.15cm to 0.2cm.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This flexible circuit board interface anti-false alarm detection circuit board uses probes on two conductive plates in each conductive group to connect to the positive and negative terminals of the detection power supply. When no flexible circuit board to be tested is placed on the detection fixture, the probes on the two conductive plates cannot form a circuit with the flexible circuit board, so the circuit is open and no current can be detected. The detection result output is abnormal, and the abnormality is due to the absence of a workpiece or the workpiece being placed in an off-center position. When a flexible circuit board to be tested is placed on the detection fixture and it is a good product, the probes on the two conductive plates form a closed loop with each connecting line on the connection contact end of the flexible circuit board. At this time, normal current is detected, and the detection result output is normal. When a flexible circuit board to be tested is placed on the detection fixture and it is a defective product, any two adjacent connecting lines are in contact, that is, the two parallel circuits are connected by a line in the middle, forming a short circuit. At this time, an abnormally large current is detected, and the detection result output is defective. The entire circuit board can effectively and quickly identify various conditions of the flexible circuit board on the detection fixture through this detection method. It has a simple and ingenious structure, is easy to use, and can be adapted to flexible circuit boards with various connection line conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the flexible circuit board structure in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a traditional testing circuit board;

[0016] Figure 3 This is a schematic diagram of the structure of a false alarm detection circuit board for a flexible circuit board interface in this utility model.

[0017] In the picture:

[0018] 10. Circuit board body; 20. Connecting conductive group; 30. Conductive sheet. Detailed Implementation

[0019] 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.

[0020] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0023] Please refer to Figure 3 In this embodiment, a false alarm prevention detection circuit board for a flexible circuit board interface includes a circuit board body 10 and several rows of spaced and parallel connecting conductive groups 20 disposed on the circuit board body 10. Each row of connecting conductive groups 20 includes two conductive plates 30 arranged in a straight line and spaced apart, and the two conductive plates 30 are respectively connected to the positive and negative terminals of the detection power supply. The position of the probes can be flexibly set according to the shape of the connection lines of the flexible circuit board to be tested. Figure 1 The connection lines at the flexible circuit board's contact points are multi-segment broken lines for illustrative purposes only. Under normal circumstances, the connection lines in this part are straight lines.

[0024] The two conductive pieces 30 in the connecting conductive group 20 are independent and do not contact each other, i.e., they do not conduct electricity. A circuit is only formed when both probes of the two conductive pieces 30 contact a certain connection line of the flexible circuit board. The material of the conductive pieces 30 can be the same as the material of the connection line of the flexible circuit board, such as conductive metals such as copper and tin.

[0025] The entire system connects to the positive and negative terminals of the detection power supply via probes on the two conductive plates 30 in each conductive group 20. When no flexible circuit board to be tested is placed on the detection fixture, the probes of the two conductive plates 30 cannot form a circuit with the flexible circuit board, so the circuit is open and no current can be detected. The detection result output is abnormal, and the abnormality is due to the absence of a workpiece or the workpiece being placed in an off-center position. When a good flexible circuit board to be tested is placed on the detection fixture, each connecting line on the connection contact end of the two conductive plates 30 forms a closed loop, and the entire system... The circuit consists of multiple circuits connected in parallel with the detection power supply. When a normal current is detected, the output result is "normal". When a defective flexible circuit board is placed on the detection fixture, any two adjacent connecting lines will be in contact, meaning the two parallel circuits will be connected by a line, forming a short circuit. In this case, an abnormally large current will be detected, and the output result will be "defective". This detection method can effectively and quickly identify various conditions of flexible circuit boards on the detection fixture. The structure is simple and ingenious, the function is easy to implement, and it can be adapted to flexible circuit boards with various connection line conditions.

[0026] Furthermore, the spacing between each group of conductive connecting groups 20 is defined as d, and the spacing between each conductive line on the connecting contact end of the flexible circuit board is defined as l. The values ​​of d and l are matched and set accordingly. When the flexible circuit board is placed in the correct position on the detection platform, when the detection circuit board performs detection, the first row of conductive connecting groups 20 is exactly in contact with the first connecting line. Through the uniform and matched spacing setting, it can be ensured that the subsequent connections of good products are effective and reliable.

[0027] Furthermore, the values ​​of d and l range from 0.15cm to 0.2cm. The value of d is determined based on the value of l. Since the spacing between each connecting line at the contact end in a typical flexible circuit board is generally between 0.15cm and 0.2cm, the value range of d is also adopted within this range. Moreover, the specific values ​​of d and l are equal to ensure the corresponding connection relationship at the correct position and guarantee the accuracy of detection.

[0028] In addition, each conductive sheet 30 is elongated and has a probe on it. The probe is used to make an electrical connection with the flexible circuit board to be tested. At the same time, the two conductive sheets in each conductive group are connected to the positive and negative terminals of the detection power supply respectively through metal conductive wires.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A false alarm prevention detection circuit board for flexible circuit board interfaces, characterized in that: The circuit board body (10) includes a circuit board body (10) and several rows of spaced and parallel connecting conductive groups (20) arranged on the circuit board body (10). Each row of connecting conductive groups (20) includes two conductive plates (30) arranged in a straight line and spaced apart. The two conductive plates (30) are respectively connected to the positive and negative terminals of the detection power supply.

2. The false alarm prevention detection circuit board for flexible circuit board interfaces according to claim 1, characterized in that: The spacing between each group of conductive connecting groups (20) is defined as d, and the spacing between each conductive line on the connecting contact end of the flexible circuit board is defined as l, wherein the values ​​of d and l are set to match.

3. The anti-false alarm detection circuit board for flexible circuit board interfaces according to claim 2, characterized in that: The values ​​of d and l range from 0.15cm to 0.2cm.

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