FPC circuit board detection positioning die

Abstract

The utility model discloses an FPC circuit board detection positioning mold, relates to the technical field of FPC circuit board detection, solves the problems that the FPC circuit board detection efficiency is low and the large-batch detection requirement cannot be met, and comprises a first needle template and a second needle template, a positioning groove matched with the shape of a circuit board to be detected is jointly formed in the first needle template and the second needle template; the first connecting module and the second connecting module are respectively provided with a plurality of first probes which are used for being in contact with contact pins of electronic components on a circuit board to be detected; the needle die fixing block is provided with a second probe which is electrically contacted with a circuit board to be detected; and a magnet. According to the mold, the FPC circuit board can be quickly positioned, meanwhile, the probes at the corresponding parts are electrically contacted with the FPC circuit board and the corresponding electronic components, and then the first connecting module and the second connecting module can be connected with a detection instrument, so that the FPC circuit board can be quickly detected, and the detection efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC circuit board detection, in particular to an FPC circuit board detection and positioning mold. Background Art

[0002] Flexible printed circuits (FPCs) are highly reliable and flexible printed circuit boards made from polyimide or polyester film. They feature high wiring density, light weight, thinness, and excellent bendability. They are widely used in various electronic devices, including mobile phones, electronic watches, and tablets.

[0003] After the FPC circuit board is produced, its resistance, capacitance, voltage and other properties need to be tested to check whether it meets the design requirements. Due to the different shapes of FPC circuit boards, which are usually irregular, and their good flexibility, it is inconvenient to fix them during testing. The testing instrument needs to be connected to each connection point and each electronic component on the FPC circuit board through wires, and then the power is turned on for testing. This method is relatively cumbersome, and it is necessary to repeatedly connect the testing instrument to the FPC circuit board electrically, which is a cumbersome operation. At the same time, due to the large number of connection ports, local poor contact is prone to occur, which requires repeated debugging. Therefore, it cannot meet the needs of large-scale testing and is relatively inefficient. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and design an FPC circuit board detection and positioning mold to solve the problem that the FPC circuit board detection efficiency is low and cannot meet the needs of large-scale detection.

[0005] To achieve the above purpose, the technical solution of the present invention is to provide an FPC circuit board detection and positioning mold, comprising:

[0006] A first pin template and a second pin template, wherein the first pin template and the second pin template are both formed with a positioning groove adapted to the shape of the circuit board to be tested, and the positioning groove has a plurality of positioning holes for facilitating the positioning of pins on the electronic components;

[0007] A first connection module and a second connection module, the first connection module and the second connection module are respectively located at the bottom of the first needle template and the second needle template, and the first needle template and the second needle template are each provided with a plurality of first probes for contacting the pins of the electronic components on the circuit board to be tested, and the positions of the first probes correspond to the positions of the positioning holes;

[0008] A needle mold fixing block, the needle mold fixing block is located at the bottom of the first needle mold plate, and the needle mold fixing plate has a second probe for electrically contacting the circuit board to be tested, and the second probe is electrically connected to the first connection module;

[0009] The magnet is located at the bottom of the first needle mold plate and on one side of the needle mold fixing block, and is used to provide a magnetic field environment for the electronic components on the circuit board to be detected.

[0010] Preferably, an installation groove is provided on the first needle template, a positioning block is arranged in the installation groove, the positioning block has a positioning groove, the positioning groove is a part of the positioning groove, the positioning groove has several positioning holes, and the first connection module is located below the positioning block.

[0011] Preferably, the first connection module includes a base, a header connector fixed to the bottom of the base, a fixing block fixed to the top of the base, and a plurality of the first probes inserted and fixed on the fixing block, and the first probes are electrically connected to the header connector.

[0012] Preferably, a positioning portion is formed on the fixing block in an upward protrusion, and the bottom of the positioning block has a groove for engaging with the positioning portion. A positioning pin is provided on the fixing block, and the positioning pin is plugged into the positioning block.

[0013] Preferably, a detection mechanism for sensing the circuit board to be detected is provided at the bottom of the first needle template, an avoidance hole is provided in the positioning groove, and the detection mechanism is located below the avoidance hole.

[0014] Preferably, the bottoms of the first needle template and the second needle template are both provided with negative pressure connectors, and the positioning groove has a through hole connected to the negative pressure connector.

[0015] Preferably, a needle mold fixing plate is provided at the bottom of the second needle mold template, a needle mold insert is provided on the needle mold fixing plate, the needle mold insert has several limiting holes corresponding to the positions of the positioning holes, and several of the first probes pass through the limiting holes and the positioning holes in sequence.

[0016] Preferably, the second connection module includes a needle block connected to the bottom of the needle mold fixing plate through a connecting rod, a connector fixed to the bottom of the needle block, and a plurality of first probes connected to the connector.

[0017] Preferably, guide pillars and buffer springs are provided at the bottoms of the first needle template and the second needle template.

[0018] Preferably, a shift cylinder is provided below the first needle template, the shift cylinder is arranged horizontally, and the output end of the shift cylinder is connected to a support block, and the top of the support block has a receiving groove for preventing magnets.

[0019] Compared with the prior art, the beneficial effects are:

[0020] In the utility model, the FPC circuit board is placed in the positioning grooves on the first needle template and the second needle template for positioning and fixing. At the same time, the probes at the corresponding positions will be in electrical contact with the FPC circuit board and the corresponding electronic components. Then the first connection module and the second connection module can be connected to the detection instrument. After power is turned on, the detection instrument can detect the changes in the capacitance, voltage, current, resistance and other values ​​of the FPC circuit board. At the same time, the magnet provides a magnetic field environment for the chip, and the working state of the chip in the magnetic field environment is detected. There will be no poor contact, the detection of the FPC circuit board can be completed quickly, and the detection efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the FPC circuit board detection and positioning mold in the utility model;

[0022] Figure 2 It is a schematic diagram of the structure when an FPC circuit board is placed on the FPC circuit board detection and positioning mold;

[0023] Figure 3 This is a structural diagram of the first needle template and the shift cylinder when they cooperate;

[0024] Figure 4 yes Figure 3 A structural diagram from another perspective;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the first needle template;

[0026] Figure 6 is a structural diagram of a first connection module;

[0027] Figure 7 This is a schematic diagram of the installation structure of the shift cylinder and the support block;

[0028] Figure 8 It is a structural diagram of the first needle template;

[0029] Figure 9 It is a structural diagram of the positioning block;

[0030] Figure 10 This is a schematic diagram of the bottom structure of the positioning block;

[0031] Figure 11 This is a schematic diagram of the installation structure of the second needle template and the needle template fixing plate;

[0032] Figure 12 yes Figure 11 A structural diagram from another perspective;

[0033] Figure 13 It is a structural diagram of the second needle template.

[0034] In the figure, 1. first needle template; 2. second needle template; 3. first connecting module; 31. base; 32. horn connector; 33. fixing block; 4. needle mold fixing plate; 5. positioning block; 501. positioning groove; 502. groove; 6. shift cylinder; 7. second connecting module; 71. needle block; 72. connector; 8. FPC circuit board; 9. guide column; 10. buffer spring; 11. negative pressure connector; 12. detection mechanism; 13. support block; 14. needle mold fixing block; 15. magnet; 101. positioning groove; 1011. positioning hole; 102. first probe; 103. second probe. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] like Figure 1-Figure 5 and Figure 11-12 As shown, a preferred embodiment of the present invention proposes an FPC circuit board detection and positioning mold, which is used as a mold for positioning the FPC circuit board 8, and mainly includes a first needle template 1, a second needle template 2, a needle mold fixing block 14, a first connection module 3, a second connection module 7 and other components.

[0037] The first and second pin templates 1 and 2 are placed side by side, with the second pin template 2 fixedly mounted on the pin template fixing plate 4. A positioning groove 101 is formed in both the first and second pin templates 1 and 2. The positioning groove 101 is divided into two parts: one on the first pin template 1 and the other on the second pin template 2. The overall shape of the positioning groove 101 matches the shape of the FPC circuit board 8, allowing for positioning of the FPC circuit board 8 and the electronic components located thereon.

[0038] refer to Figure 3 、 Figures 8-10 The first needle template 1 has a mounting slot, into which a positioning block 5 is fixedly mounted via screws. This positioning block 5 has a positioning groove 501, which is part of the positioning groove 101 and is used to position the electronic component. Positioning groove 501 has several positioning holes 1011 within it. Since electronic components have multiple pins, these positioning holes 1011 can be used to position the pins and facilitate electrical contact between the probe (i.e., the first probe 102).

[0039] refer to Figure 6 The first connection module 3 is primarily composed of a base 31, a header connector 32, a fixing block 33, and a plurality of first probes 102. The fixing block 33 is fixed to the base 31 by screws, while the header connector 32 is fixed to the bottom of the base 31. The fixing block 33 has an upwardly protruding positioning portion and two diagonally spaced positioning pins. During assembly, the positioning portion engages with the groove 502 at the bottom of the positioning block 5 above, and the positioning pins also engage with the positioning block 5, ensuring precise positioning.

[0040] The positioning portion has a plurality of vertically extending small holes, each of which is provided with a first probe 102. The first probe 102 will pass upward through the positioning hole 1011 on the positioning block 5 and contact the electronic components on the FPC circuit board 8, and the circuit board can be tested after power is turned on.

[0041] refer to Figure 5 Two pin mold fixing blocks 14 are provided, one on each side of the bottom of the first pin mold plate 1, corresponding to two locations on the FPC circuit board. Each pin mold fixing block 14 has two probes, namely, second probes 103. The two second probes 103 pass through the first pin mold plate 1 and into the positioning slots 101, where they contact electronic components at two locations on the FPC circuit board 8.

[0042] All the second probes 103 are electrically connected to the header connector 32 via wires. The header connector 32 is a 10-pin quick connector that can be quickly plugged into a connector of a testing instrument.

[0043] refer to Figure 3 、 Figure 4 、 Figure 7 A shift cylinder 6 is provided below the first needle template 1, and the shift cylinder 6 adopts a slide cylinder. The output end of the shift cylinder 6 is fixedly connected to a support block 13, and a receiving groove is provided on the top of the support block 13, in which a magnet 15 is placed. The magnet 15 can be controlled to move to the bottom of the first needle template 1 and close to the position of the needle mold fixing block 14 by the shift cylinder 6. The two second probes 103 on one of the needle mold fixing blocks 14 will contact the chip on the FPC circuit board 8. The magnet 15 can provide a safe magnetic field environment for the chip, and after power is turned on, the performance changes of the chip in a specific magnetic field environment can be detected. The support block 13 can be controlled to move by the shift cylinder 6 so as to send the magnet to the bottom of the chip. At the same time, the magnet 15 can be quickly replaced according to needs.

[0044] The second needle template 2 is located on one side of the first needle template 1. A needle mold insert (not shown) is provided between the needle mold fixing plate 4 and the second needle template 2. The needle mold insert is used to fix the probe on the second connection module 7.

[0045] like Figure 12 As shown, the second connection module 7 consists of a needle block 71, a connector 72, and several first probes 102. The connector 72 is screwed to the bottom of the needle block 71. The two ends of the needle block 71 are fixedly connected to the needle mold fixing plate 4 above via connecting rods. The needle mold insert has several limiting holes to limit the position of the first probes 102.

[0046] The connector 72 adopts a 34-pin common connector 72, which can be quickly connected to the connector of the detection instrument.

[0047] like Figure 12 、 Figure 13 As shown, the lower ends of several first probes 102 are electrically connected to the connector 72, and the upper ends will pass through the needle mold fixing plate 4, the needle mold insert and the second needle mold plate 2 in sequence. The first probes 102 will pass through the limiting holes and the positioning holes 1011, and be inserted into the positioning groove 101, and electrically contact the electronic components on the FPC circuit board 8.

[0048] like Figure 12 As shown, to ensure that the FPV circuit board is firmly adsorbed within the positioning groove 101, a negative pressure connector 11 is provided below the first and second pin templates 1 and 2. The lower end of this negative pressure connector 11 is connected to an external air extraction mechanism. The upper end of this negative pressure connector 11 is connected to a through hole within the positioning groove 101. When the FPC circuit board 8 is placed within the positioning groove 101, the negative pressure connector 11 draws air outward to generate negative pressure, adsorbing the FPC circuit board 8 within the positioning groove 101.

[0049] A detection mechanism 12 is also provided at the bottom of the first needle template 1. The detection mechanism 12 uses an optical fiber sensor. The upper end of the optical fiber sensor passes through the avoidance hole on the first needle template 1 to detect whether the FPC circuit board 8 is placed in the positioning groove 101. When working, it will work together with the automatic detection equipment.

[0050] Guide rods and buffer springs 10 are mounted at the bottoms of the first and second pin templates 1 and 2. The guide rods provide vertical guidance, while the buffer springs 10 act as a buffer. The connector 72 pin templates work in conjunction with a pressure plate, which presses down, tightening the FPC circuit board 8 and securing it firmly against the pin templates. This compresses the buffer springs 10, providing a buffer and preventing damage.

[0051] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. An FPC circuit board detection and positioning mold, characterized in that: include: A first needle template (1) and a second needle template (2), wherein the first needle template (1) and the second needle template (2) are both formed with a positioning groove (101) adapted to the shape of the circuit board to be tested, and the positioning groove (101) has a plurality of positioning holes (1011) for facilitating positioning of pins on electronic components; A first connection module (3) and a second connection module (7), the first connection module (3) and the second connection module (7) are respectively located at the bottom of the first needle template (1) and the second needle template (2), and the first needle template (1) and the second needle template (2) are both provided with a plurality of first probes (102) for contacting the pins of the electronic components on the circuit board to be detected, and the positions of the first probes (102) correspond to the positions of the positioning holes (1011); A needle mold fixing block (14), the needle mold fixing block (14) is located at the bottom of the first needle mold plate (1), and the needle mold fixing plate (4) has a second probe (103) for electrically contacting the circuit board to be tested, and the second probe (103) is electrically connected to the first connection module (3); A magnet (15) is located at the bottom of the first needle mold plate (1) and on one side of the needle mold fixing block (14), and is used to provide a magnetic field environment for electronic components on a circuit board to be tested.

2. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: The first needle template (1) is provided with a mounting groove, a positioning block (5) is arranged in the mounting groove, the positioning block (5) has a positioning groove (501), the positioning groove (501) is a part of the positioning groove (101), the positioning groove (501) has a plurality of positioning holes (1011), and the first connection module (3) is located below the positioning block (5).

3. The FPC circuit board detection and positioning mold according to claim 2, characterized in that: The first connection module (3) comprises a base (31), a horn connector (32) fixed to the bottom of the base (31), a fixing block (33) fixed to the top of the base (31), and a plurality of first probes (102) inserted and fixed on the fixing block (33), wherein the first probes (102) are electrically connected to the horn connector (32).

4. The FPC circuit board detection and positioning mold according to claim 3, characterized in that: A positioning portion is formed on the fixing block (33) in an upward protrusion, and the bottom of the positioning block (5) has a groove (502) for engaging with the positioning portion. A positioning pin is provided on the fixing block (33), and the positioning pin is plugged into the positioning block (5).

5. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: The bottom of the first needle template (1) is provided with a detection mechanism (12) for sensing the circuit board to be detected, and the positioning groove (101) has an avoidance hole, and the detection mechanism (12) is located below the avoidance hole.

6. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: The bottoms of the first needle template (1) and the second needle template (2) are both provided with negative pressure connectors (11), and the positioning groove (101) has a through hole connected to the negative pressure connector (11).

7. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: A needle mold fixing plate (4) is provided at the bottom of the second needle mold plate (2), a needle mold insert is provided on the needle mold fixing plate (4), the needle mold insert has a plurality of limiting holes corresponding to the positions of the positioning holes (1011), and a plurality of the first probes (102) pass through the limiting holes and the positioning holes (1011) in sequence.

8. The FPC circuit board detection and positioning mold according to claim 7, characterized in that: The second connection module (7) comprises a needle block (71) connected to the bottom of the needle mold fixing plate (4) via a connecting rod, a connector (72) fixed to the bottom of the needle block (71), and a plurality of first probes (102) connected to the connector (72).

9. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: A guide column (9) and a buffer spring (10) are provided at the bottom of the first needle template (1) and the second needle template (2).

10. The FPC circuit board detection and positioning mold according to claim 1, characterized in that: A shift cylinder (6) is provided below the first needle template (1), the shift cylinder (6) is arranged horizontally, and the output end of the shift cylinder (6) is connected to a support block (13), and the top of the support block (13) has a receiving groove for preventing the magnet (15).

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