Testing device for flexible circuit board

Abstract

The utility model discloses a testing device for a flexible circuit board, and the device comprises a probe module which is used for being connected with a detection terminal, and comprises a first probe group, a second probe group, a third probe group, and a fourth probe group; the first driving mechanism is connected with the first probe group and the second probe group and is used for driving the first probe group and the second probe group to reciprocate in the first direction; the second driving mechanism is connected with the third probe group and the fourth probe group and is used for driving the third probe group and the fourth probe group to reciprocate in a second direction; wherein the first probe group and the third probe group are both connected with a part of the plurality of detection terminals, and the second probe group and the fourth probe group are both connected with the other part of the plurality of detection terminals. According to the utility model, the test precision can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, and particularly relates to a test device for a flexible circuit board. Background Art

[0002] A flexible printed circuit (FPC) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the substrate, with advantages such as high wiring density, light weight, thin thickness, foldable and bendable, three-dimensional wiring, and safety performance that cannot be compared with other types of circuit boards.

[0003] With the increasingly wide application scope of FPC in industries such as computers, consumer electronics, communication systems, industrial control systems, automobiles, medical devices, and instrumentation, the market demand is increasing. Especially the vigorous development of new energy vehicles has driven a substantial increase in the demand for FPCs used in in-vehicle power batteries.

[0004] In the production of FPCs, in order to ensure the quality of the produced FPCs, they need to be tested before leaving the factory. By measuring the resistance value, it is possible to quickly determine whether the line conductivity on the circuit board meets the design requirements. The existing FPC test equipment tests the electrical performance of FPCs through test fixtures. However, generally, the test fixtures used for measuring resistance values are two-wire tests or pseudo-four-wire tests, and the accuracy during resistance value testing cannot meet the current test requirements for flexible circuit boards. Summary of the Utility Model

[0005] In view of this, the utility model aims to propose a test device for a flexible circuit board, which can achieve true four-wire testing and improve the test accuracy.

[0006] To solve the above technical problems, an embodiment of the utility model provides a test device for a flexible circuit board. The flexible circuit board to be tested is connected to the test device through a connector. The connector is provided with a plurality of detection terminals for connecting to the test device. The test device includes:

[0007] A probe module, which is used to connect to the detection terminals and includes a first probe group, a second probe group, a third probe group, and a fourth probe group;

[0008] A first driving mechanism, which is connected to the first probe group and the second probe group and is used to drive the first probe group and the second probe group to reciprocate in a first direction;

[0009] A second driving mechanism, which is connected to the third probe group and the fourth probe group and is used to drive the third probe group and the fourth probe group to reciprocate in a second direction;

[0010] Among them, both the first probe group and the third probe group are connected to some of the detection terminals of a number of detection terminals, and both the second probe group and the fourth probe group are connected to another part of the detection terminals.

[0011] Optionally, the connector includes two rows of detection terminals arranged side by side;

[0012] The first probe group includes a plurality of first probes arranged side by side, the third probe group includes a plurality of third probes arranged side by side, and the first probes and the third probes are arranged in one-to-one correspondence with a row of detection terminals;

[0013] The second probe group includes a plurality of second probes arranged side by side, the fourth probe group includes a plurality of fourth probes arranged side by side, and the second probes and the fourth probes are arranged in one-to-one correspondence with the other row of detection terminals.

[0014] Optionally, the head ends of the first probe and the second probe are cylindrical; the head ends of the third probe and the fourth probe are pointed.

[0015] Optionally, the first probe, the second probe, the third probe, and the fourth probe are all made of metal.

[0016] Optionally, the first driving mechanism includes a first cylinder.

[0017] Optionally, the second driving mechanism includes a jaw cylinder, the jaw cylinder includes a first jaw and a second jaw distributed along the second direction, the first jaw is connected to the third probe group, and the second jaw is connected to the fourth probe group.

[0018] Optionally, the driving end of the first driving mechanism is connected to the fixed end of the jaw cylinder.

[0019] Optionally, it further includes a guide rail and a slider. The guide rail extends along the first direction on both sides of the fixed end of the jaw cylinder. The slider is connected to the fixed end of the jaw cylinder and is slidably connected to the guide rail.

[0020] Optionally, the second driving mechanism includes:

[0021] A screw rod, extending along the second direction, the screw rod includes a first threaded section and a second threaded section, and the spiral directions of the first threaded section and the second threaded section are opposite;

[0022] A first connecting member, connected to the first threaded section and the third probe group;

[0023] A second connecting member, connected to the second threaded section and the fourth probe group;

[0024] A motor, connected to the screw rod, for driving the screw rod to rotate.

[0025] Optionally, it further includes a flexible cable interface for connecting to a test instrument. The flexible cable interface includes a first flexible cable interface, a second flexible cable interface, a third flexible cable interface, and a fourth flexible cable interface, which are respectively used for connecting to the first probe group, the second probe group, the third probe group, and the fourth probe group.

[0026] The beneficial effects of the present utility model are as follows:

[0027] Each probe in the first probe group and the third probe group is simultaneously connected to some of the same detection terminals, and each probe in the second probe group and the fourth probe group is simultaneously connected to the other part of the same detection terminals. Therefore, two loops can be led out at each detection terminal, thereby realizing true four-wire testing, and further improving the testing accuracy of the flexible circuit board. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings, the parts do not necessarily draw according to the actual ratio.

[0029] Figure 1 Showing a three-dimensional structural schematic diagram of the connector;

[0030] Figure 2 Showing a structural schematic diagram of a testing device for a flexible circuit board provided by an embodiment of the present utility model Figure 1 ;

[0031] Figure 3 Showing a structural schematic diagram of a testing device for a flexible circuit board provided by an embodiment of the present utility model Figure 2 ;

[0032] Figure 4 Showing a structural schematic diagram of each probe group provided by an embodiment of the present utility model.

[0033] Explanation of the reference numerals of the drawing elements: Detailed Embodiments

[0034] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0035] Reference is now made to the accompanying drawings to describe exemplary embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the drawings are not limitations on the present invention.

[0036] Unless otherwise specified, the terms used herein, including scientific and technical terms, have the ordinary meaning understood by those skilled in the art. Additionally, it can be understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant fields, and should not be understood in an idealized or overly formal sense.

[0037] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then such descriptions of "first", "second", etc. are only for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Figure 1 It is a schematic structural diagram of the connector 101 used in this embodiment. As Figure 1 shown, one end of the connector 101 is connected to the flexible circuit board to be tested, and the other end of the connector 101 is used to connect to the test device. The connector 101 connects the flexible circuit board to be tested and the test device to achieve electrical connection, so as to measure the resistance of the flexible circuit board. Specifically, a connection port is provided on the side of the connector 101 for connecting to the test device, and a number of detection terminals 1011 are provided inside the connection port.

[0040] Figure 2 It is a schematic structural diagram of the test device for the flexible circuit board provided by an embodiment of the present invention Figure 1 , Figure 3Structural schematic of a test device for a flexible circuit board provided by an embodiment of the present utility model Figure 2 As Figure 2 and Figure 3 shown, in this embodiment, the test device includes:

[0041] A probe module for connecting with detection terminals 1011, including a first probe group 1, a second probe group 2, a third probe group 3, and a fourth probe group 4;

[0042] A first driving mechanism 5, which is connected to the first probe group 1 and the second probe group 2, and is used to drive the first probe group 1 and the second probe group 2 to reciprocate in a first direction (such as Figure 2 the x direction shown in

[0043] ); Figure 2 A second driving mechanism 6, which is connected to the third probe group 3 and the fourth probe group 4, and is used to drive the third probe group 3 and the fourth probe group 4 to reciprocate in a second direction (such as

[0044] the y direction shown in

[0045] );

[0046]

[0047] Among them, both the first probe group 1 and the third probe group 3 are connected to some of the detection terminals 1011 of several detection terminals 1011, and both the second probe group 2 and the fourth probe group 4 are connected to another part of the detection terminals 1011.

[0045] By arranging the first probe group 1 and the second probe group 2 in the first direction, and arranging the third probe group 3 and the fourth probe group 4 in the second direction, where the first direction and the second direction are perpendicular to each other. In addition, each probe in the first probe group 1 and the third probe group 3 is simultaneously connected to some of the same detection terminals 1011, and each probe in the second probe group 2 and the fourth probe group 4 is simultaneously connected to another part of the same detection terminals 1011. Therefore, two loops can be led out at each detection terminal 1011, thereby realizing true four-wire testing, and further improving the test accuracy of the flexible circuit board.

[0046] Specifically, in this embodiment, the first direction is the horizontal direction, and the second direction is the vertical direction.

[0047] A number of detection terminals 1011 are divided into two parts. One part of the detection terminals 1011 is used to connect with the first probe group 1 and the third probe group 3, and the other part of the detection terminals 1011 is used to connect with the second probe group 2 and the fourth probe group 4, so that two sets of probe groups can be led out from one detection terminal 1011 respectively. The first probe group 1 and the second probe group 2 are used to connect with the detection terminals 1011 from one side of the connector 101 in the horizontal direction. The third probe group 3 is used to connect with the detection terminals 1011 from above the connector 101 and connect with the same part of the detection terminals 1011 as the first probe group 1. The fourth probe group 4 is used to connect with the detection terminals 1011 from below the connector 101 and connect with the same part of the detection terminals 1011 as the second probe group 2.

[0048] Further, as Figure 1 shown, the connector 101 includes two rows of detection terminals 1011 arranged side by side. There are two rows of detection terminals 1011 arranged side by side in the connection port of the connector 101. Hollow openings 1012 are provided on the outer shells on the upper and lower sides of the connector 101 at positions corresponding to each detection terminal 1011. The detection terminals 1011 can be contacted through the hollow openings 1012.

[0049] Figure 4 is a schematic structural diagram of each probe group provided by an embodiment of the present invention. As Figure 4 shown, the first probe group 1 includes a plurality of first probes 11 arranged side by side, and the third probe group 3 includes a plurality of third probes 31 arranged side by side. The first probes 11 and the third probes 31 are both arranged in one-to-one correspondence with one row of detection terminals 1011; the second probe group 2 includes a plurality of second probes 21 arranged side by side, and the fourth probe group 4 includes a plurality of fourth probes 41 arranged side by side. The second probes 21 and the fourth probes 41 are both arranged in one-to-one correspondence with the other row of detection terminals 1011.

[0050] Specifically, in this embodiment, the first probe group 1 and the second probe group 2 are arranged on the same side and at a position opposite to the connection port of the connector 101. One row of first probes 11 of the first probe group 1 is connected in one-to-one correspondence with the upper row of detection terminals 1011, and one row of second probes 21 of the second probe group 2 is connected in one-to-one correspondence with the lower row of detection terminals 1011. The third probe group 3 and the fourth probe group 4 are respectively arranged on the upper and lower sides of the connector 101 and at positions opposite to each other. One row of third probes 31 of the third probe group 3 is connected in one-to-one correspondence with the upper row of detection terminals 1011, and one row of fourth probes 41 of the fourth probe group 4 is connected in one-to-one correspondence with the lower row of detection terminals 1011. Thus, the probes and the detection terminals 1011 are connected in one-to-one correspondence, so that two loops can be led out from each detection terminal 1011.

[0051] Further, asFigure 4 As shown, in this embodiment, the head ends of the first probe 11 and the second probe 21 are cylindrical; the head ends of the third probe 31 and the fourth probe 41 are pointed.

[0052] Specifically, the detection terminal 1011 of the connector 101 is columnar, and the head ends of the first probe 11 and the second probe 21 are cylindrical, so as to be sleeved on the columnar detection terminal 1011 to achieve electrical connection; the head ends of the third probe 31 and the fourth probe 41 are pointed, and can pass through the hollow openings 1012 on the upper and lower sides of the connector 101 to contact the detection terminal 1011 inside the connector 101 to achieve electrical connection.

[0053] It should be noted that the structures of the head ends of the first probe, the second probe, the third probe and the fourth probe can be set according to the structure of the connector 101 and the structure of the detection terminal 1011.

[0054] Furthermore, the first probe 11, the second probe 21, the third probe 31 and the fourth probe 41 are all made of metal materials. Thus, they can conduct electricity.

[0055] Furthermore, the first driving mechanism 5 includes a first air cylinder.

[0056] Optionally, the driving end of the first air cylinder is connected to the second driving mechanism 6 and the first probe group 1 and the second probe group 2. When driving the first probe group 1 and the second probe group 2 to reciprocate in the first direction, the third probe group 3, the fourth probe group 4 and the second driving mechanism 6 also move together, so as to ensure the relative positions between the probe groups.

[0057] Furthermore, in an embodiment of the present utility model, as Figure 1 and Figure 2 shown, the second driving mechanism 6 includes a jaw air cylinder. The jaw air cylinder includes a first jaw 61 and a second jaw 62 distributed in the second direction. The first jaw 61 is connected to the third probe group 3, and the second jaw 62 is connected to the fourth probe group 4.

[0058] Specifically, in this embodiment, the second driving mechanism 6 adopts a jaw air cylinder. The jaw air cylinder is provided with a first jaw 61 and a second jaw 62. The first jaw 61 and the second jaw 62 are arranged to be distributed in the second direction and are respectively connected to the third probe group 3 and the fourth probe group 4, so as to drive the two probe groups to move in the second direction towards each other or away from each other, so that the third probe group 3 is connected to or separated from the detection terminals 1011 in the upper row, and the fourth probe group 4 is connected to or separated from the detection terminals 1011 in the lower row.

[0059] The claw parts of the first clamping jaw 61 and the second clamping jaw 62 are respectively provided with trapezoidal connecting plates 63 to facilitate the installation and positioning of the probe group.

[0060] Further, the driving end of the first driving mechanism 5 is connected to the fixed end of the clamping jaw cylinder. Thus, the clamping jaw cylinder and the third probe group 3 and the fourth probe group 4 electrically connected to the clamping jaw cylinder are driven to move synchronously.

[0061] The first driving mechanism 5 and the second driving mechanism 6 are connected by a first connecting plate 73, which is convenient for installation and maintenance. Specifically, in this embodiment, a first connecting plate 73 is provided on the side of the clamping jaw cylinder opposite to the first driving mechanism 5, and the first connecting plate 73 is placed vertically. The fixed end of the clamping jaw cylinder is fixed to one side of the first connecting plate 73, and the driving end of the first cylinder is fixed to the other side of the first connecting plate 73. Thus, when the driving end of the first cylinder is driven, the clamping jaw cylinder can be driven to move synchronously.

[0062] Further, a guide rail 71 and a slider 72 are further included. The guide rail 71 extends along the first direction on both sides of the fixed end of the clamping jaw cylinder, and the slider 72 is connected to the fixed end of the clamping jaw cylinder and is slidably connected to the guide rail 71.

[0063] Specifically, in this embodiment, a second connecting plate 74 is further provided on the outside of the fixed end of the clamping jaw cylinder, and the second connecting plate 74 is placed horizontally. A slider 72 is provided on the second connecting plate 74. The guide rail 71 extends along the first direction and is provided below the slider 72, and the slider 72 is slidably connected to the guide rail 71. In addition, the first probe group 1 and the second probe group 2 can be fixed to one end of 74.

[0064] Further, in another embodiment of the present utility model, the second driving mechanism 6 includes:

[0065] A screw rod, which extends along the second direction. The screw rod includes a first thread section and a second thread section, and the spiral directions of the first thread section and the second thread section are opposite;

[0066] A first connecting member, which is connected to the first thread section and the third probe group 3;

[0067] A second connecting member, which is connected to the second thread section and the fourth probe group 4;

[0068] A motor, which is connected to the screw rod and is used to drive the screw rod to rotate.

[0069] Specifically, the second driving mechanism 6 includes a screw rod, a first connecting member, a second connecting member, and a motor. The screw rod is arranged to extend in the second direction, and the screw rod includes a first thread section and a second thread section with opposite spiral directions. The first thread section and the second thread section are respectively located on both sides of the middle of the screw rod. Among them, the third probe group 3 is connected to the first thread section of the screw rod through the first connecting member, and the fourth probe group 4 is connected to the second thread section of the screw rod through the second connecting member. A second guide rail extending in the second direction is further provided on one side of the screw rod, and the first connecting member and the second connecting member are slidably connected to the second guide rail. The output end of the motor is connected to one end of the screw rod. When the motor drives the screw rod to rotate, it can drive the first connecting member and the second connecting member to move in a direction approaching or moving away from each other, and further drive the third probe group 3 and the fourth probe group 4 to move in a direction approaching or moving away from the connector 101.

[0070] Optionally, the driving end of the first driving mechanism 5 is connected to the middle of the screw rod.

[0071] Further, it further includes a cable interface for connecting to a test instrument. The cable interface includes a first cable interface 81, a second cable interface 82, a third cable interface 83, and a fourth cable interface 84, which are respectively used to connect to the first probe group 1, the second probe group 2, the third probe group 3, and the fourth probe group 4.

[0072] Specifically, a circuit board is provided between the cable interface and the probe. The tail of the probe is welded to the circuit board, and the cable interface is also welded to the circuit board, so that electrical conduction can be achieved between the probe and the cable interface through the circuit board. The cable interface is used to connect to a test instrument, so that the test instrument can be electrically connected to the flexible circuit board through the test device and the connector to measure the resistance of the flexible circuit board.

[0073] According to the test device for a flexible circuit board provided by the present utility model, the first cylinder drives the first probe group 1 and the second probe group 2 to move in the first direction towards the connector 101 to connect to the detection terminals 1011 of the connector 101 from one side; the jaw cylinder drives the third probe group 3 and the fourth probe group 4 to move in a direction approaching each other to connect to the detection terminals 1011 of the connector 101 from the other two sides. In addition, the first probe group 1 and the third probe group 3 are connected to one row of detection terminals 1011 in a one-to-one correspondence, and the second probe group 2 and the fourth probe group 4 are connected to the other row of detection terminals 1011 in a one-to-one correspondence, so that two loops can be led out from one detection terminal 1011, and true four-wire testing can be realized, improving the testing accuracy.

[0074] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field within the spirit and technical idea disclosed by the present utility model of the punching hole detachment inspection type sample should still be covered by the claims of the present utility model.

Claims

1. A testing device for a flexible circuit board, characterized in that, The flexible circuit board to be tested is connected to the test device through a connector. The connector is provided with a plurality of detection terminals for connecting to the test device. The test device includes: A probe module for connecting to the detection terminals, including a first probe group, a second probe group, a third probe group, and a fourth probe group; A first driving mechanism, which is connected to the first probe group and the second probe group, and is used to drive the first probe group and the second probe group to reciprocate in a first direction; A second driving mechanism, which is connected to the third probe group and the fourth probe group, and is used to drive the third probe group and the fourth probe group to reciprocate in a second direction; Wherein, both the first probe group and the third probe group are connected to some of the detection terminals of the plurality of detection terminals, and both the second probe group and the fourth probe group are connected to another part of the detection terminals.

2. The test device according to claim 1, characterized in that, The connector includes two rows of the detection terminals arranged side by side; The first probe group includes a plurality of first probes arranged side by side, and the third probe group includes a plurality of third probes arranged side by side. The first probes and the third probes are both arranged in one-to-one correspondence with one row of the detection terminals; The second probe group includes a plurality of second probes arranged side by side, and the fourth probe group includes a plurality of fourth probes arranged side by side. The second probes and the fourth probes are both arranged in one-to-one correspondence with the other row of the detection terminals.

3. The test device according to claim 2, characterized in that The head ends of the first probe and the second probe are cylindrical; the head ends of the third probe and the fourth probe are pointed.

4. The testing device according to claim 2, characterized in that, The first probe, the second probe, the third probe, and the fourth probe are all made of metal.

5. The testing device according to claim 1, characterized in that, The first driving mechanism includes a first air cylinder.

6. The test device according to claim 1, wherein The second driving mechanism includes a clamping jaw air cylinder. The clamping jaw air cylinder includes a first clamping jaw and a second clamping jaw distributed in the second direction. The first clamping jaw is connected to the third probe group, and the second clamping jaw is connected to the fourth probe group.

7. The test device according to claim 6, characterized in that, The driving end of the first driving mechanism is connected to the fixed end of the clamping jaw air cylinder.

8. The test device according to claim 7, wherein It also includes a guide rail and a slider. The guide rail extends along the first direction on both sides of the fixed end of the clamping jaw air cylinder. The slider is connected to the fixed end of the clamping jaw air cylinder and is slidably connected to the guide rail.

9. The test device according to claim 5, wherein The second driving mechanism includes: A screw rod extending along the second direction. The screw rod includes a first thread section and a second thread section, and the spiral directions of the first thread section and the second thread section are opposite; A first connecting piece connected to the first thread section and the third probe group; A second connecting piece connected to the second thread section and the fourth probe group; A motor connected to the screw rod for driving the screw rod to rotate.

10. The test device according to claim 1, characterized in that, It also includes a wire connecting interface for connecting to a test instrument. The wire connecting interface includes a first wire connecting interface, a second wire connecting interface, a third wire connecting interface, and a fourth wire connecting interface, which are respectively used to connect to the first probe group, the second probe group, the third probe group, and the fourth probe group.

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