Punching hole falling inspection device for flexible circuit board

Abstract

The utility model discloses a punching hole falling-off inspection device for a flexible circuit board, and the device comprises a first jig which is provided with at least one pair of test electrodes, and the test electrodes are connected with a test instrument through wires; the second jig is arranged below the first jig, a mounting groove is formed in the side, facing the first jig, of the second jig, a conductive element is arranged in the mounting groove, the flexible circuit board to be inspected is placed on the conductive element, and when the first jig is pressed on the second jig, the test electrode corresponds to a punching hole of the flexible circuit board. According to the utility model, the flexible circuit board of which the punching hole does not fall off can be effectively inspected, the inspection efficiency is greatly improved, and the risk of defective product outflow is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board inspection, in particular to a punching hole shedding inspection device for a flexible circuit board. Background Art

[0002] Flexible circuit board, or FPC, is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as the substrate. It has advantages that other types of circuit boards cannot match, such as high wiring density, light weight, thin thickness, foldable and bendable, three-dimensional wiring, and safety performance. As cars develop towards electrification and intelligence, the demand for automotive flexible circuit boards will further increase.

[0003] However, the scale of the domestic flexible circuit board industry is getting bigger and bigger, especially in the automotive field, where market competition is intensifying. In order to ensure that the produced flexible circuit board products meet the use requirements, it is generally necessary to check whether the punching holes of the flexible circuit board have fallen off after production is completed, that is, to check whether the punching holes of the flexible circuit board are penetrated. However, in the prior art, the method of checking whether the punching holes of the flexible circuit board have fallen off is to rely on manual inspection. However, in the actual production process, problems such as punch passivation and reverse peeling frequently occur. This method relying on manual inspection requires stopping the production line, with a long waiting time and relatively low efficiency, and a high risk of missed inspection and outflow due to the punching holes not falling off. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the punching hole of the flexible circuit board in the prior art relies on manual inspection, which has low inspection efficiency and is prone to missed inspection. The utility model provides a punching hole dropout inspection device for a flexible circuit board, which can effectively inspect the flexible circuit board with the punching hole not dropped out, greatly improves the inspection efficiency, and reduces the risk of defective products flowing out.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a punching hole fall-off inspection device for a flexible circuit board, comprising:

[0006] A first fixture, wherein the first fixture is provided with at least one pair of test electrodes, and the test electrodes are connected to a test instrument via a wire;

[0007] The second jig is arranged below the first jig and is provided with a mounting groove on the side facing the first jig, a conductive element is provided in the mounting groove, the flexible circuit board to be inspected is placed on the conductive element, and when the first jig is pressed onto the second jig, the test electrode corresponds to the punched hole of the flexible circuit board.

[0008] Furthermore, the conductive element is an aluminum block.

[0009] Furthermore, a limiting groove is provided on the conductive element, and the limiting groove is used to place the flexible circuit board, and the shape of the limiting groove is adapted to the outer shape of the flexible circuit board.

[0010] Furthermore, the distance between the limiting groove and the outer edge of the flexible circuit board is 10 mm.

[0011] Furthermore, the test electrode is a spring probe.

[0012] Furthermore, the second fixture is also provided with a positioning column, which extends toward the first fixture, and the first fixture is also provided with a positioning hole matching the positioning column.

[0013] Furthermore, the first fixture and the second fixture are respectively in the shape of a cuboid, and four positioning posts and four positioning holes are respectively provided, and the four positioning posts are respectively provided at the middle part or four corners of the side length of the second fixture.

[0014] Furthermore, it also includes a driving mechanism, which is connected to the first fixture and is used to drive the first fixture to reciprocate in the first direction.

[0015] Further, the first fixture includes, from top to bottom, a first mounting plate, a second mounting plate and a first guide plate, the upper side of the second mounting plate is provided with a first connecting guide column, the first mounting plate is connected to the first connecting guide column through a first locking member to lock and fix the first mounting plate and the second mounting plate, the lower side of the second mounting plate is provided with a test electrode, the first guide plate is fixedly connected to the second mounting plate through a second locking member and is provided with a through hole for the test electrode to pass through;

[0016] And / or, the second fixture includes, from top to bottom, a third mounting plate, a fourth mounting plate and a fifth mounting plate, the fifth mounting plate is provided with a second connecting guide column, the fourth mounting plate is connected to the second connecting guide column via a first locking member to lock and fix the fourth mounting plate and the fifth mounting plate, the third mounting plate is fixedly connected to the fourth mounting plate via a second locking member and a mounting groove is provided on the third mounting plate.

[0017] Furthermore, an adapter plate is provided between the first mounting plate and the second mounting plate, and the conductive wire includes a first connecting wire and a second connecting wire, one end of the first connecting wire is connected to the test electrode, the other end of the first connecting wire is connected to the adapter plate, one end of the second connecting wire is connected to the adapter plate, and the other end of the second connecting wire is connected to the test instrument.

[0018] The beneficial effects of the utility model are:

[0019] At least one pair of test electrodes is arranged on the first jig, and a conductive element is arranged on the second jig. The flexible circuit board to be inspected is placed on the conductive element, and the test electrode is located above the flexible circuit board to be inspected and corresponds to the punching hole of the flexible circuit board. When the first jig is pressed onto the second jig, if the pair of test electrodes are in contact with the conductive element and the test electrodes can be conducted, it is determined that the punching hole has fallen off; if at least one of the pair of test electrodes is not in contact with the conductive element and the test electrodes cannot be conducted, it is determined that the punching hole has not fallen off. Therefore, the punching hole falling off inspection device provided by the utility model can effectively inspect the flexible circuit board whose punching hole has not fallen off by detecting whether the test electrode is in a conducting state without affecting the circuit function test, thereby greatly improving the inspection efficiency and reducing the risk of defective products flowing out. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In the drawings, the various parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 The overall structural schematic diagram of the punching hole fall-off inspection device for a flexible circuit board provided by an embodiment of the utility model is shown;

[0022] Figure 2 An exploded view of a punching hole fall-off inspection device for a flexible circuit board provided by an embodiment of the utility model is shown;

[0023] Figure 3 A schematic diagram showing a structure in which a conductive element provided by an embodiment of the utility model is placed on a second fixture;

[0024] Figure 4 A partial structural schematic diagram of a punching hole fall-off inspection device for a flexible printed circuit board provided in one embodiment of the utility model is shown.

[0025] Component numbers in the drawings:

[0026] 1. First fixture, 11. First mounting plate, 12. Second mounting plate, 13. First guide plate, 14. First connecting column, 2. Second fixture, 21. Third mounting plate, 22. Fourth mounting plate, 23. Fifth mounting plate, 24. Second connecting column, 3. Test electrode, 4. Conductive element, 5. Positioning column, 6. Adapter plate. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. 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 accompanying drawings are not intended to limit the present invention.

[0029] Unless otherwise specified, the terms used herein, including technical terms, have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] like Figures 1 to 4 As shown, Figures 1 to 4 The following are schematic diagrams of a punching hole dropout inspection device for a flexible circuit board provided in an embodiment of the utility model. The embodiment of the utility model provides a punching hole dropout inspection device for a flexible circuit board, comprising:

[0033] A first fixture 1, wherein the first fixture 1 is provided with at least one pair of test electrodes 3, and the test electrodes 3 are connected to a test instrument via a wire;

[0034] The second jig 2 is arranged below the first jig 1 and is provided with a mounting groove on the side facing the first jig 1, a conductive element 4 is provided in the mounting groove, the flexible circuit board to be inspected is placed on the conductive element 4, when the first jig 1 is pressed on the second jig 2, the test electrode 3 corresponds to the punched hole of the flexible circuit board placed on the conductive element 4.

[0035] In this embodiment, at least one pair of test electrodes 3 is provided on the first jig 1, and a conductive element 4 is provided on the second jig 2. The flexible circuit board to be inspected is placed on the conductive element 4, and the test electrode 3 is located above the flexible circuit board to be inspected and corresponds to the punching hole of the flexible circuit board. When the first jig 1 is pressed onto the second jig 2, if the test electrodes 3 are all in contact with the conductive element 4 and the test electrodes 3 can be turned on, it is determined that the punching hole has fallen off; if one of the test electrodes 3 is not in contact with the conductive element 4 and the test electrode 3 cannot be turned on, it is determined that the punching hole has not fallen off. Therefore, the punching hole falling off inspection device provided by the utility model can effectively inspect the flexible circuit board whose punching hole has not fallen off without affecting the circuit function test by detecting whether the test electrode 3 is in a conducting state, thereby greatly improving the inspection efficiency and reducing the risk of defective products flowing out.

[0036] Specifically, in this embodiment, at least one pair of test electrodes 3 is provided on the lower surface of the first jig 1, and the test electrodes 3 are connected to the test instrument through a wire to detect whether the test electrodes 3 can conduct electricity. The second jig 2 is arranged below the first jig 1, and a mounting groove is opened on the side surface facing the first jig 1, and the conductive element 4 is arranged in the mounting groove, and the flexible circuit board to be inspected is placed on the conductive element 4. Optionally, the upper surface of the conductive element 4 is flush with the upper surface of the second jig 2. When the FPC to be inspected is placed on the conductive element 4 and the first jig 1 is pressed on the second jig 2, the test electrode 3 corresponds to the punching hole of the flexible circuit board to be inspected, and can contact the conductive element 4 when the punching hole falls off. If the punching hole falls off, the test electrode 3 passes through the punching hole of the flexible circuit board and contacts the conductive element 4, and the test electrode 3 is in a conducting state; if the punching hole does not fall off, the test electrode 3 is in a disconnected state because it cannot contact the conductive element 4.

[0037] It should be noted that the number of pairs of matching test electrodes can be determined according to the shapes of different flexible circuit boards, and the present invention does not impose any limitation on this.

[0038] It should also be noted that a mounting groove can be set on the second fixture 2, and the conductive element is an integral whole. It can also be provided with multiple mounting grooves according to the punching position of the flexible circuit board, and each mounting groove is provided with a conductive element. The specific setting can be made according to needs.

[0039] Furthermore, if Figure 3 As shown, the conductive element 4 is an aluminum block.

[0040] Specifically, the aluminum block has the advantages of low manufacturing cost and good electrical conductivity. With this technical solution, an aluminum block is set in the mounting groove of the second fixture 2. As long as a pair of test electrodes 3 can contact the aluminum block, the two test electrodes 3 of the first fixture 1 can form a loop with the test instrument, and no wiring is required in the second fixture 2, thereby saving welding steps and improving production efficiency. Especially when there are many test points, point welding errors can also be avoided.

[0041] Furthermore, a limiting groove is provided on the conductive element 4, and the limiting groove is used to place the flexible circuit board, and the shape of the limiting groove is adapted to the outer shape of the flexible circuit board.

[0042] Specifically, in this embodiment, the limiting groove can be cut directly on the aluminum block. Thus, the shape of the flexible circuit board can be avoided so that the flexible circuit board to be inspected can be well placed on the aluminum block. In addition, the punching hole of the flexible circuit board is located close to the nickel sheet of the solder pad on the flexible circuit board to avoid being pulled and torn by the solder pad.

[0043] It should be noted that the size of the limiting groove can be set according to the shape of the flexible circuit board according to actual needs, and the present invention does not impose any restrictions on this.

[0044] In an embodiment of the present invention, the distance between the limiting groove and the outer edge of the flexible circuit board is 10 mm.

[0045] Furthermore, the test electrode 3 is a spring probe.

[0046] Specifically, the spring probe includes a sleeve and a spring pin installed in the sleeve. During installation, a hole is drilled on the first fixture 1, and then a sleeve of a model corresponding to the spring pin is installed on the drilled hole, and the spring pin is installed in the sleeve. At this time, the wire is welded to the sleeve, so that the spring pin and the wire are connected through the sleeve.

[0047] Furthermore, the second jig 2 is also provided with a positioning post 5, which extends toward the first jig 1, and the first jig 1 is also provided with a positioning hole matching the positioning post 5. Thus, the positioning post 5 and the positioning hole are arranged one by one, thereby ensuring the mold clamping accuracy of the first jig 1 and the second jig 2.

[0048] Specifically, the positioning post 5 is fixedly mounted on the upper surface of the second fixture 2, and a positioning hole is provided at a corresponding position of the first fixture 1. When the first fixture 1 is pressed onto the first fixture 1 for mold closing, the positioning post 5 is inserted into the positioning hole for positioning.

[0049] It is worth noting that, in order to ensure the mold clamping accuracy of the first fixture 1 and the second fixture 2, the number of positioning columns 5 and positioning holes can be set according to the size of the fixture.

[0050] Optionally, in this embodiment, the first fixture 1 and the second fixture 2 are respectively in the shape of a rectangular parallelepiped, and four positioning posts 5 and four positioning holes are respectively provided, and the four positioning posts 5 are respectively provided at the middle of the side length or the four corners of the second fixture 2, and the four positioning holes are respectively provided at the middle of the side length or the four corners of the first fixture 1. More optionally, the four positioning posts 5 are respectively provided at the four corners of the second fixture 2.

[0051] Furthermore, it also includes a driving mechanism, which is connected to the first fixture 1 and is used to drive the first fixture 1 in a first direction (such as Figure 1 The x direction is shown in the middle, which is the direction in which the first fixture 1 and the second fixture 2 are closed and separated) and move back and forth.

[0052] Optionally, the driving mechanism is an electric push rod or a cylinder to achieve automatic control. The driving mechanism drives the first fixture 1 to move back and forth in the first direction to press the first fixture 1 onto the second fixture 2 for testing, or to separate the first fixture 1 from the second fixture 2 to take and place the flexible circuit board.

[0053] Furthermore, if Figure 1 and Figure 2 As shown, the first fixture 1 includes, from top to bottom, a first mounting plate 11, a second mounting plate 12 and a first guide plate 13. A first connecting guide column 14 is provided on the upper side of the second mounting plate 12. The first mounting plate 11 is connected to the first connecting guide column 14 through a first locking member to lock and fix the first mounting plate 11 and the second mounting plate 12. A test electrode 3 is provided on the lower side of the second mounting plate 12. The first guide plate 13 is fixedly connected to the second mounting portion 12 through a second locking member and is provided with a through hole for the test electrode 3 to pass through.

[0054] And / or, the second fixture 2 includes, from top to bottom, a third mounting plate 21, a fourth mounting plate 22 and a fifth mounting plate 23, the fifth mounting plate 23 is provided with a second connecting guide column 24, the fourth mounting plate 22 is connected to the second connecting guide column 24 through a first locking member to lock and fix the fourth mounting plate 22 and the fifth mounting plate 23, the third mounting plate 21 is fixedly connected to the fourth mounting plate 22 through a second locking member and a mounting groove is provided on the third mounting plate 21.

[0055] The above technical solution can not only improve the accuracy of drilling for installing test electrodes, but also facilitate the welding of wires, and maintain the balance and density of the upper and lower fixtures, which is convenient for maintenance during use.

[0056] Optionally, the first locking member and the second locking member are both locking screws.

[0057] Specifically, the first fixture 1 includes, from top to bottom, a first mounting plate 11, a second mounting plate 12 and a first guide plate 13. Among them, the first mounting plate 11 is used to match the test instrument; considering the influence of the sleeve distance and the height of the spring pin's spring in and out, the spring probe is installed on the second mounting plate 12, and the first guide plate 13 is used to control the stroke of the spring probe. In this way, the spring probe can be fixed and the protrusion of the spring probe can be well controlled. A vertically extending first connecting column 14 is provided on the upper surface of the second mounting plate 12, and the first mounting plate 11 is covered on the second mounting plate 12, and is connected to the first connecting column 14 through a first locking member at a position corresponding to the first connecting column 14, thereby fixing the first mounting plate 11 and the second mounting plate 12.

[0058] The second fixture 2 includes, from top to bottom, a third mounting plate 21, a fourth mounting plate 22 and a fifth mounting plate 23. Among them, the third mounting plate 21 is provided with a mounting groove for placing a flexible circuit board. The fourth mounting plate 22 can also be installed with a spring probe for use in the case of a double-sided flexible circuit board. Improve the versatility of the inspection device. The fifth mounting plate 23 is used to match the test instrument. A vertically extending second connecting column 24 is provided on the upper surface of the fifth mounting plate 23, and the fourth mounting plate 22 is covered on the fifth mounting plate 23, and is connected to the second connecting column 24 through a first locking member at a position corresponding to the second connecting column 24, thereby fixing the fifth mounting plate 23 and the fourth mounting plate 22.

[0059] Furthermore, an adapter plate 6 is provided between the first mounting plate 11 and the second mounting plate 12, and the conductive wire includes a first connecting wire and a second connecting wire, one end of the first connecting wire is connected to the test electrode 3, and the other end of the first connecting wire is connected to the adapter plate 6, one end of the second connecting wire is connected to the adapter plate 6, and the other end of the second connecting wire is connected to the test instrument.

[0060] Specifically, an adapter plate 6 is disposed between the first mounting plate 11 and the second mounting plate 12, and the wires drawn from the test electrodes 3 are welded on the adapter plate 6 and connected to the test instrument through the adapter plate 6. Thus, wiring and assembly errors can be reduced.

[0061] During operation, the test instrument is electrically connected to the first jig 1, and the flexible circuit board to be inspected is placed in the limiting groove of the conductive element 4, the first jig 1 is moved downward and pressed onto the second jig 2, and the first jig 1 and the second jig 2 are molded together. At this time, the test electrode 3 corresponds to the punched hole on the flexible circuit board. If both test electrodes 3 contact the conductive element 4, the test electrodes 3 are turned on and the circuit is in a short-circuit state, indicating that the punched hole on the flexible circuit board has fallen off. If one of a pair of test electrodes 3 does not contact the conductive element 4, the test electrode 3 is not turned on and the circuit is in an open-circuit state, indicating that the punched hole on the flexible circuit board has not fallen off.

[0062] The punching hole detachment inspection device for flexible circuit boards provided by the utility model can effectively inspect flexible circuit boards whose punching holes have not detached, thereby greatly improving inspection efficiency and reducing product defect rate.

[0063] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A punching hole dropout inspection device for a flexible circuit board, characterized in that: include: A first fixture, wherein the first fixture is provided with at least one pair of test electrodes, and the test electrodes are connected to a test instrument through a wire; The second jig is arranged below the first jig and is provided with a mounting groove on a side facing the first jig, a conductive element is provided in the mounting groove, the flexible circuit board to be inspected is placed on the conductive element, and when the first jig is pressed onto the second jig, the test electrode corresponds to the punched hole of the flexible circuit board.

2. The punching hole fall-off inspection device according to claim 1, characterized in that: The conductive element is an aluminum block.

3. The punching hole fall-off inspection device according to claim 2, characterized in that: The conductive element is provided with a limiting groove, in which the flexible circuit board is placed, and the shape of the limiting groove is adapted to the shape of the flexible circuit board.

4. The punching hole fall-off inspection device according to claim 3, characterized in that: The distance between the limiting groove and the outer edge of the flexible circuit board is 10 mm.

5. The punching hole fall-off inspection device according to claim 1, characterized in that: The test electrode is a spring probe.

6. The punching hole fall-off inspection device according to claim 1, characterized in that: The second jig is further provided with a positioning post, which extends toward the first jig, and the first jig is further provided with a positioning hole matching the positioning post.

7. The punching hole fall-off inspection device according to claim 6, characterized in that: The first fixture and the second fixture are respectively in the shape of a cuboid, and four positioning posts and four positioning holes are respectively provided. The four positioning posts are respectively provided at the middle of the side length or the four corners of the second fixture.

8. The punching hole fall-off inspection device according to claim 1, characterized in that: It also includes a driving mechanism, which is connected to the first fixture and is used to drive the first fixture to reciprocate in a first direction.

9. The punching hole fall-off inspection device according to claim 1, characterized in that: The first fixture comprises, from top to bottom, a first mounting plate, a second mounting plate and a first guide plate, the upper side of the second mounting plate is provided with a first connecting guide column, the first mounting plate is connected to the first connecting guide column through a first locking member to lock and fix the first mounting plate and the second mounting plate, the lower side of the second mounting plate is provided with the test electrode, the first guide plate is fixedly connected to the second mounting plate through a second locking member and is provided with a through hole for the test electrode to pass through; And / or, the second fixture includes, from top to bottom, a third mounting plate, a fourth mounting plate and a fifth mounting plate, the fifth mounting plate is provided with a second connecting guide column, the fourth mounting plate is connected to the second connecting guide column via the first locking member to lock and fix the fourth mounting plate and the fifth mounting plate, the third mounting plate is fixedly connected to the fourth mounting plate via the second locking member and the mounting groove is provided on the third mounting plate.

10. The punching hole fall-off inspection device according to claim 9, characterized in that: An adapter plate is provided between the first mounting plate and the second mounting plate, and the conductive wire includes a first connecting wire and a second connecting wire, one end of the first connecting wire is connected to the test electrode, and the other end of the first connecting wire is connected to the adapter plate, one end of the second connecting wire is connected to the adapter plate, and the other end of the second connecting wire is connected to the test instrument.

Images