PCBA (Printed Circuit Board Assembly) on-off testing device with FPC (Flexible Printed Circuit Board) welded on PCB

Abstract

The utility model discloses a PCBA (Printed Circuit Board Assembly) on-off test device with an FPC (Flexible Printed Circuit Board) welded on a PCB (Printed Circuit Board), which comprises a control box, a test circuit arranged in the control box, a lower needle mechanism and a pressing mechanism arranged at the top of the control box, a placing mechanism arranged at the top of the lower needle mechanism, an upper needle mechanism arranged right in front of the pressing mechanism, and an upper needle mechanism arranged right in front of the pressing mechanism. According to the PCBA on-off testing device with the FPC welded on the PCB provided by the utility model, the PCBA to be tested is placed on the placing mechanism, and the pressing mechanism drives the upper probe mechanism to press down the PCBA to be tested, so that a lower probe arranged on the lower probe mechanism, an upper probe arranged on the upper probe mechanism, and a conduction column are respectively connected with a lower test point, an upper test point and a connection terminal of the PCBA to be tested. The on-off performance between the connection terminal of the FPC and the PCB test point is tested through the test circuit, the product quality is ensured, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of PCBA testing, and in particular to a PCBA continuity testing device with FPC soldered on PCB. Background Technology

[0002] FPC is short for Flexible Printed Circuit, also known as a flexible printed circuit board. It is a printed circuit board made of flexible insulating substrate. It has the advantages of high wiring density, thinness, light weight and good bending. It can be arranged arbitrarily according to spatial layout requirements and can move and stretch arbitrarily in three-dimensional space. It is widely used in modern electronic products.

[0003] Because FPCs are expensive and difficult to modify and repair, electronic products often combine the advantages of both FPCs (flexible printed circuit boards) and PCBs (rigid printed circuit boards) in their design. FPCs are used for applications requiring bending, winding, or folding, while PCBs are used for others. The FPCs are then soldered onto the PCBs. During the soldering process, defects such as open circuits and short circuits may occur. Therefore, conducting continuity tests on the soldered PCBAs is a crucial step in ensuring product quality. Currently, most domestic companies rely on manual continuity testing, which is costly, inefficient, and prone to errors.

[0004] Therefore, it is necessary to provide a PCBA continuity test device with FPC soldered on PCB to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a PCBA continuity test device for FPC soldered on PCB, which realizes automatic continuity testing between the connection terminals of FPC and the test points of PCB, ensuring product quality and improving testing efficiency.

[0006] This utility model provides a PCBA continuity test device for FPC soldered on PCB, including a control box, a test circuit is provided inside the control box, a pin-down mechanism and a clamping mechanism are provided on the top of the control box, a placement mechanism is provided on the top of the pin-down mechanism, and an upper pin mechanism is provided in front of the clamping mechanism.

[0007] Preferably, the needle lowering mechanism includes a needle lowering plate, an elastic column, a first guide sleeve, and a lower probe. The needle lowering plate is fixed to the top of the control box, and the elastic column, the first guide sleeve, and the lower probe are respectively fixed in the elastic column mounting hole, the first guide sleeve mounting hole, and the lower probe mounting hole provided in the needle lowering plate.

[0008] Preferably, the placement mechanism includes a placement plate and a first guide post, the upper end of the first guide post being fixed to the lower surface of the placement plate, and the placement plate being provided with a first placement groove, a positioning post, and a second placement groove.

[0009] Preferably, the clamping mechanism includes a bracket, a fixing plate, a clamp, and a second guide post. The lower end of the bracket is fixed to the top of the control box, the fixing plate is fixed to the bracket, the clamp is fixed to the fixing plate, and the upper end of the second guide post is fixed to the lower surface of the mounting platform on which the bracket is installed.

[0010] Preferably, the needle-feeding mechanism includes a connecting plate, a connecting post, a needle-feeding plate, an upper probe, a second guide sleeve, a clamping post, a mounting plate, and a connecting post. The connecting plate is fixed to the lower end of the clamping rod of the clamping clamp. The connecting plate and the needle-feeding plate are fixedly connected by the connecting post. The second guide sleeve is fixed in the mounting hole provided in the needle-feeding plate. The clamping post and the mounting plate are both fixed on the lower surface of the needle-feeding plate. The upper probe and the connecting post are respectively fixed in the upper probe mounting hole and the connecting post mounting hole provided in the mounting plate.

[0011] Preferably, the first guide post and the first guide sleeve are designed to be matched, and the first guide post of the placement mechanism passes through the first guide sleeve of the needle-feeding mechanism, and the placement mechanism slides up and down along the first guide sleeve through the first guide post.

[0012] Preferably, the second guide post and the second guide sleeve are designed to be matched. The second guide post of the clamping mechanism passes through the second guide sleeve of the needle-upping mechanism, and the needle-upping mechanism slides up and down along the second guide post through the pressure rod of the clamping clamp.

[0013] Preferably, the test circuit includes a continuity test circuit and an open circuit test circuit.

[0014] Preferably, the continuity test circuit performs a continuity test between the connection terminals on the FPC and the corresponding test points on the connected PCB. If the connection terminals on the FPC are connected to the corresponding test points on the connected PCB, the test is passed.

[0015] Preferably, the open circuit test circuit performs open circuit tests on adjacent non-conductive test points on the PCB. If the non-conductive test points are disconnected, the test passes.

[0016] Compared with the prior art, this utility model provides a PCBA continuity testing device with FPC soldered on PCB, which has the following advantages:

[0017] 1. A PCBA continuity test device for FPC soldered on PCB, wherein the PCBA under test is placed on a placement plate, and the upper probe mechanism is moved downward by the clamping rod of the clamp to press the PCBA under test, so that the upper probe, lower probe and conduction post are respectively connected to the lower test point, upper test point and connection terminal of the PCBA under test, and automatic continuity test is realized through the test circuit.

[0018] 2. A PCBA continuity test device for FPC soldered on PCB, wherein the continuity test circuit performs continuity test between the connection terminals on the FPC and the corresponding test points on the PCB, and the open circuit test circuit performs open circuit test between adjacent non-conductive test points on the PCB, thereby quickly confirming whether the electrical connection between the FPC and the PCB is qualified. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the present invention;

[0022] Figure 3 This is an exploded view of the needle-feeding mechanism of this utility model;

[0023] Figure 4 This is an exploded view of the placement mechanism of this utility model;

[0024] Figure 5 This is an exploded view of the clamping mechanism of this utility model;

[0025] Figure 6 This is an exploded view of the needle-feeding mechanism of this utility model;

[0026] Figure 7 This is a schematic diagram of the PCBA structure to be tested according to this utility model;

[0027] Figure 8 This is a continuity test circuit of this utility model;

[0028] Figure 9 This is a circuit break test circuit of this utility model.

[0029] In the picture:

[0030] 1. Control box;

[0031] 2. Needle lowering mechanism; 21. Needle lowering plate; 211. Elastic post mounting hole; 212. First guide sleeve mounting hole; 213. Lower probe mounting hole; 22. Elastic post; 23. First guide sleeve; 24. Lower probe;

[0032] 3. Placement mechanism; 311. First placement slot; 312. Positioning post; 313. Second placement slot; 31. Placement plate; 32. First guide post;

[0033] 4. Clamping mechanism; 41. Bracket; 411. Mounting platform; 42. Fixing plate; 43. Clamping clamp; 431. Clamping rod; 44. Second guide post;

[0034] 5. Needle feeding mechanism; 51. Connecting plate; 52. Connecting post; 53. Needle feeding plate; 54. Upper probe; 55. Second guide sleeve; 56. Clamping post; 57. Mounting plate; 571. Upper probe mounting hole; 572. Connecting post mounting hole; 58. Conductor post;

[0035] 6. PCBA under test; 61. PCB; 611. Positioning hole; 612. Test point; 6121. Upper test point; 6122. Lower test point; 62. FPC; 621. Connecting terminal. Detailed Implementation

[0036] 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.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] This utility model provides the following technical solution:

[0039] Combination Figures 1 to 7 A PCBA continuity test device for FPC soldered on PCB includes a control box (1), a test circuit is provided inside the control box (1), a needle-down mechanism (2) and a clamping mechanism (4) are provided on the top of the control box (1), a placement mechanism (3) is provided on the top of the needle-down mechanism (2), and an upper needle mechanism (5) is provided in front of the clamping mechanism (4).

[0040] In this embodiment, the needle lowering mechanism (2) includes a needle lowering plate (21), an elastic column (22), a first guide sleeve (23), and a lower probe (24). The needle lowering plate (21) is fixed on the top of the control box (1), and the elastic column (22), the first guide sleeve (23), and the lower probe (24) are respectively fixed in the elastic column mounting hole (211), the first guide sleeve mounting hole (212), and the lower probe mounting hole (213) provided on the needle lowering plate (21).

[0041] In this embodiment, the placement mechanism (3) includes a placement plate (31) and a first guide post (32). The upper end of the first guide post (32) is fixed to the lower surface of the placement plate (31). The placement plate (31) is provided with a first placement groove (311), a positioning post (312), and a second placement groove (313).

[0042] Specifically, the placement mechanism (3) is inserted into the first guide sleeve (23) of the needle-feeding mechanism (2) through the first guide post (32), and the placement mechanism (3) can move up and down along the first guide sleeve (23).

[0043] In this embodiment, the clamping mechanism (4) includes a bracket (41), a fixing plate (42), a clamp (43), and a second guide post (44). The lower end of the bracket (41) is fixed to the top of the control box (1), the fixing plate (42) is fixed to the bracket (41), the clamp (43) is fixed to the fixing plate (42), and the upper end of the second guide post (44) is fixed to the lower surface of the mounting platform (411) provided on the bracket (41).

[0044] In this embodiment, the needle-feeding mechanism (5) includes a connecting plate (51), a connecting post (52), a needle-feeding plate (53), an upper probe (54), a second guide sleeve (55), a clamping post (56), a mounting plate (57), and a connecting post (58). The connecting plate (51) is fixed to the lower end of the clamping rod (431) of the clamping clamp (43). The connecting plate (51) and the needle-feeding plate (53) are fixedly connected by the connecting post (52). The second guide sleeve (55) is fixed in the mounting hole (531) provided on the needle-feeding plate (53). The clamping post (56) and the mounting plate (57) are both fixed on the lower surface of the needle-feeding plate (53). The upper probe (54) and the connecting post (58) are respectively fixed in the upper probe mounting hole (571) and the connecting post mounting hole (572) provided on the mounting plate (57).

[0045] Specifically, the pressing mechanism (4) is inserted into the second guide sleeve (55) of the needle-feeding mechanism (5) through the second guide post (44), and the needle-feeding mechanism (5) can move up and down along the second guide post (44) through the second guide sleeve (55).

[0046] In this embodiment, the test circuit includes a continuity test circuit and an open circuit test circuit. The continuity test circuit performs a continuity test between the connection terminal (621) on the FPC (62) and the test point (612) on the corresponding connected PCB (61). The open circuit test circuit performs an open circuit test between the non-conductive test points (612) on the PCB (61).

[0047] Specifically, the PCBA (6) to be tested is placed on the placement board (31), wherein the PCB (61) is inserted into the positioning post (312) through the positioning hole (611) and placed into the first placement slot (311), and the connection terminal (621) of the FPC (62) is placed into the second placement slot (313).

[0048] Specifically, the downward pressure of the clamp (43) drives the upper needle mechanism (5) to press down through the pressure rod (431), so that the clamping column (56) presses the PCBA (6) under test. The placement mechanism (3) moves downward, and the placement plate (31) compresses the elastic column (22), so that the upper probe (54), the conductive column (58), and the lower probe (24) are connected to the test point (6121), the connection terminal (621), and the lower test point (6122) of the PCBA (6) under test, respectively.

[0049] Specifically, the upper probe (54), the conduction post (58), and the lower probe (24) are connected to the upper test point (6121), the connection terminal (621), and the lower test point (6122) of the PCBA (6) under test, respectively. The continuity test circuit performs continuity test on the connection line between the connection terminal (621) on the FPC (62) and the upper test point (6121) and the lower test point (6122) on the PCB (61).

[0050] Specifically, the upper probe (54) and lower probe (24) are connected to the upper test point connection (6121) and lower test point connection (6122) of the PCBA (6) under test, respectively, and the open circuit test circuit performs open circuit test on the adjacent non-conductive test point (612) of the PCB (61).

[0051] Specifically, there are 6 connecting terminals (621), namely A1, A2, A3, A4, A5, and A6. When the clamp is pressed down, A1, A2, A3, A4, A5, and A6 are connected to the 6 conductive posts (58).

[0052] Specifically, there are 9 test points (612), namely B1, B2, B3, B4, B5, B6, B7, B8, and B8. When the clamp is pressed down, B1, B2, B3, B4, B5, B6, B7, B8, and B8 are connected to 6 upper probes (53) and 3 lower probes (24).

[0053] Specifically, A1, A2, A3, A4, A5, and A6 are connected to B1, B2, B3, B4, B5, and B6 respectively.

[0054] Specifically, the continuity test circuit for A1 and B1 includes a control signal terminal RA0, a current-limiting resistor R2, an LED1, a transistor Q1, current-limiting resistors R3 and R4, an optocoupler U2, a pull-down resistor R7, a filter capacitor C2, an input resistor R6, and a signal acquisition terminal RB0. When a continuity test between A1 and B1 is required, the control signal terminal RA0 outputs a high level. This high level from RA0 passes through the current-limiting resistor R2 and LED1 to the base of transistor Q1. When the A1 and B1 lines are connected, VCC flows through the current-limiting resistor... R3 supplies power to the collector of transistor Q1, turning Q1 on. VCC flows through current-limiting resistor R4 to optocoupler U2, enabling U2 to operate. The acquisition signal terminal RB0 is at a high level, meaning the A1 and B1 lines are connected, and the continuity test is passed. When the A1 and B1 lines are disconnected, VCC cannot supply power to the collector of transistor Q1, causing Q1 to not conduct. The acquisition signal terminal RB0 is at a high level, meaning the A1 and B1 lines are disconnected, and the continuity test fails.

[0055] Similarly, conduct continuity tests on A2 and B2, A3 and B3, A4 and B4, A5 and B5, and A6 and B6.

[0056] Specifically, the B2 and B1 or B3 open-circuit test circuit includes a control signal terminal RC0, a current-limiting resistor R39, LED7, a transistor Q7, a current-limiting resistor R40, a current-limiting resistor R41, an optocoupler U8, a pull-down resistor R44, a filter capacitor C8, an input resistor R43, and a data acquisition terminal RC1. When an open-circuit test is required between B2 and B1 or B3, the control signal terminal RC0 outputs a high level. This high level from RC0 passes through the current-limiting resistor R39 and LED7 to the base of transistor Q7. When there is no continuity between the test points B2 and B1 or B3, the collector voltage of transistor Q7... When the voltage is 0, transistor Q7 is cut off, optocoupler U8 is not working, and the acquisition signal terminal RC1 is at a low level. This means that B2 is not conducting with either B1 or B3, and the open-circuit test is passed. When B2 is conducting with either B1 or B3, VCC supplies power to the collector of transistor Q7 through current-limiting resistor R40, causing transistor Q7 to conduct. VCC then supplies power to optocoupler U8 through current-limiting resistor R41, causing optocoupler U28 to work. The acquisition signal terminal RC1 is at a high level, meaning that B2 is conducting with either B1 or B3, and the open-circuit test fails.

[0057] Similarly, perform open circuit tests on B5 and B4 or B6, and B8 and B7 or B9.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A PCBA on-off test device for FPC welding on PCB, comprising a control box (1), characterized in that, The control box (1) is provided with a test circuit, the control box (1) top is provided with lower needle mechanism (2) and pressure mechanism (4), lower needle mechanism (2) top is provided with placing mechanism (3), pressure mechanism (4) front is provided with upper needle mechanism (5); The lower needle mechanism (2) includes a lower needle plate (21), an elastic column (22), a first guide sleeve (23) and a lower probe (24), the lower needle plate (21) is fixed on the top of the control box (1), the elastic column (22), the first guide sleeve (23) and the lower probe (24) are respectively fixed in the elastic column mounting hole (211), the first guide sleeve mounting hole (212) and the lower probe mounting hole (213) provided in the lower needle plate (21). The upper needle mechanism (5) includes a connecting plate (51), a connecting column (52), an upper needle plate (53), an upper probe (54), a second guide sleeve (55), a pressure column (56), a mounting plate (57) and a guide column (58), the connecting plate (51) is fixed on the lower end of the pressure lever (431) of the pressure clamp (43), the connecting plate (51) is fixedly connected with the upper needle plate (53) through the connecting column (52), the second guide sleeve (55) is fixed in the mounting hole (531) provided in the upper needle plate (53), the pressure column (56) and the mounting plate (57) are both fixed on the lower surface of the upper needle plate (53), the upper probe (54) and the guide column (58) are respectively fixed in the upper probe mounting hole (571) and the connecting column mounting hole (572) provided in the mounting plate (57).

2. The PCBA on-off test device of claim 1, wherein, The placing mechanism (3) includes a placing plate (31) and a first guide column (32), the first guide column (32) is fixed on the lower surface of the placing plate (31), and the placing plate (31) is provided with a first placing groove (311), a positioning column (312) and a second placing groove (313).

3. The PCBA on-off test device of claim 1, wherein, The pressure mechanism (4) includes a support (41), a fixed plate (42), a pressure clamp (43) and a second guide column (44), the lower end of the support (41) is fixed on the top of the control box (1), the fixed plate (42) is fixed on the support (41), the pressure clamp (43) is fixed on the fixed plate (42), and the upper end of the second guide column (44) is fixed on the lower surface of the mounting table (411) provided in the support (41).

4. The PCBA on-off test device of claim 2, wherein, The first guide column (32) is designed in matched relationship with the first guide sleeve (23), and the first guide column (32) penetrates through the first guide sleeve (23) and slides.

5. The PCBA on-off test device of claim 3, wherein, The second guide column (44) is designed in matched relationship with the second guide sleeve (55), and the second guide column (44) penetrates through the second guide sleeve (55) and slides.

6. The PCBA on-off test device of claim 1, wherein, The test circuit includes a conduction test circuit and an open circuit test circuit.

7. The PCBA on-off test device of claim 6, wherein, The conduction test circuit conducts test on the conduction between the connecting terminal (621) on the FPC (62) and the corresponding test point (612) on the PCB (61).

8. The PCBA on-off test device of claim 6, wherein, The open circuit test circuit conducts test on the open circuit between adjacent test points (612) on the PCB (61).

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