A printed board for cable testing and a cable testing fixture

Abstract

The present application relates to the technical field of electrical performance test, in particular to a kind of printed board for cable test and cable test fixture, cable test fixture includes printed board for cable test, printed board for cable test is equipped with shielding slot, shielding slot has the extension section for the shielding layer exposed section of cable along its extension direction clamping, printed board is equipped with the signal contact conductor for the signal line exposed section of cable to be pressed in the interval of shielding slot, the slot wall of shielding slot is equipped with the shielding contact conductor for the shielding layer exposed section contact, shielding layer exposed section of cable is fixed and electrically contacted by using the clamping of shielding slot on printed board, shielding layer exposed section of cable does not need to be considered to be pressed, only signal line exposed section of cable needs to be pressed, it does not affect signal conduction, it is easy to operate, not prone to poor contact due to operation deviation, it is beneficial to guarantee the reliability of cable and printed board signal conduction and shielding conduction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical performance test, in particular to a printed board for cable test and a cable test fixture. BACKGROUND

[0002] With the data transmission rate getting faster, the performance of the cable for transmitting data also needs to be improved accordingly. In order to master the transmission performance of high-speed cable products, performance test is usually needed, and currently, cable test fixture is used in cooperation with test instrument for test. The cable test fixture includes a printed board, a connector and a support seat, and a wire pressing mechanism. The printed board is provided with signal contact conductors and shielding contact conductors at intervals on the surface thereof. The connector is installed on the printed board and is electrically connected to the signal contact conductors and the shielding contact conductors through the wires on the surface of the printed board. The connector is used for connecting the test instrument. The wire pressing mechanism is installed on the support seat and has a pressing head for pressing the cable. During the test, the cable is stripped to have a signal wire exposed section and a shielding layer exposed section. The printed board is placed on the support seat, and then the cable is placed on the printed board so that the signal wire exposed section and the shielding layer exposed section of the cable correspond to the signal contact conductors and the shielding contact conductors on the printed board, respectively. Then, the cable is pressed on the printed board by the pressing head of the wire pressing mechanism so that the signal wire exposed section of the cable is in conductive contact with the signal contact conductors on the printed board, and the shielding layer exposed section of the cable is in conductive contact with the shielding contact conductors on the printed board. Then, the connector on the printed board is used to connect the test instrument for test.

[0003] In order to reliably contact the signal wire exposed section and the shielding layer exposed section of the cable to the corresponding conductors on the printed board, the pressing head of the wire pressing mechanism is pressed on the joint between the signal wire exposed section and the shielding layer exposed section of the cable during use, so that the signal wire exposed section and the shielding layer exposed section can be pressed by the pressing head. However, the pressing head is pressed on both the signal wire exposed section and the shielding layer exposed section, which may affect the pressing reliability of the pressing head due to the difference in radial size between the signal wire exposed section and the shielding layer exposed section and the deviation in the position of the cable placed on the printed board during operation, and thus the contact may not be good. SUMMARY

[0004] The present application aims to provide a printed board for cable test to solve the problem that the contact reliability is easily affected by operation deviation when the pressing head is pressed on the joint between the signal wire exposed section and the shielding layer exposed section of the cable to realize the signal conduction and shielding conduction between the cable and the printed board. The present application also aims to provide a cable test fixture to solve the above problem.

[0005] The technical scheme of the printed board for cable test of the present application is as follows:

[0006] A kind of printed board for cable testing, the printed board is provided with shielding slot, shielding slot has the extension section for the shielding layer exposed section of cable to be clamped along its extension direction, the printed board is provided with the signal contact conductor for the signal line exposed section of cable to be pressed at the interval position of shielding slot, the slot wall of shielding slot is provided with the shielding contact conductor for the shielding layer exposed section to contact.

[0007] Further, shielding slot is through in the thickness direction of printed board.

[0008] Further, the signal contact conductor is provided on both side faces of printed board to be used for contacting two signal lines of cable respectively.

[0009] Further, the signal contact conductor is provided on the same side face of printed board to be used for contacting two signal lines of cable respectively.

[0010] Further, shielding slot extends to the edge of printed board to form side opening for avoiding when the shielding layer exposed section of cable is clamped into shielding slot.

[0011] Further, the signal contact conductor is provided on the side of printed board away from side opening of shielding slot.

[0012] Further, the extension direction of signal contact conductor is consistent with the extension direction of shielding slot.

[0013] Further, the shielding contact conductor is metal plating layer.

[0014] The printed board for cable testing of the present application has the following advantages: the present application provides a printed board for cable testing which can ensure reliable signal conduction and shielding conduction between cable and printed board, by providing shielding slot on the printed board, the shielding layer exposed section of cable is clamped into the shielding slot along the length direction of cable, the shielding layer exposed section of cable can be fixed by clamping in the shielding slot and contact with the shielding contact conductor in the shielding slot to realize shielding conduction, the signal line exposed section of cable can be pressed and contacted by the signal contact conductor provided on the printed board at the interval position of shielding slot after the shielding layer exposed section of cable is clamped into the shielding slot to realize signal conduction, thus the shielding layer exposed section of cable is fixed by clamping in the shielding slot on the printed board and electrically contacted, without considering pressing the shielding layer exposed section of cable, only the signal line exposed section of cable needs to be pressed, without affecting signal conduction, easy to operate, not easy to cause poor contact due to operation deviation, and conducive to ensuring the reliability of signal conduction and shielding conduction between cable and printed board.

[0015] The technical scheme of the cable testing fixture of the present application is:

[0016] A cable testing fixture includes a support base and a printed board, the support base is provided with a wire pressing mechanism, and the printed board is provided with a shielding slot, the shielding slot has an extension section for a shielding layer exposure section of a cable to be clamped along the extension direction of the shielding slot, the printed board is provided with a signal contact conductor for a signal line exposure section of the cable to be pressed by the wire pressing mechanism at intervals from the shielding slot, and the slot wall of the shielding slot is provided with a shielding contact conductor for the shielding layer exposure section to contact.

[0017] Further, the shielding slot penetrates the thickness direction of the printed board.

[0018] Further, the signal contact conductor is arranged on both side surfaces of the printed board to contact two signal lines of the cable respectively, and the wire pressing mechanism is arranged on both sides of the support base in the thickness direction of the printed board.

[0019] Further, the support base is provided with a mounting slot for the printed board to be vertically mounted on the support base.

[0020] Further, the support base includes an upper part and a lower part vertically spaced, the mounting slot is arranged on the opposite side of the upper part and the lower part respectively, the mounting slot of the upper part is arranged opposite to the mounting slot of the lower part, one side of the extension direction of the mounting slot is provided with a mounting entrance for the printed board to be vertically mounted, and a space is formed between the upper part and the lower part of the support base for the shielding slot and the signal contact conductor of the printed board to be exposed.

[0021] Further, two signal contact conductors are arranged on the same side surface of the printed board to contact two signal lines of the cable respectively.

[0022] Further, the shielding slot extends to the edge of the printed board to form a side opening for the shielding layer exposure section of the cable to avoid when clamped into the shielding slot.

[0023] Further, the signal contact conductor is arranged on the printed board at a side away from the side opening of the shielding slot.

[0024] Further, the extension direction of the signal contact conductor is consistent with the extension direction of the shielding slot.

[0025] Further, the shielding contact conductor is a metal plating layer.

[0026] The beneficial effects of the cable testing fixture of the present invention are as follows: The present invention improves upon existing cable testing fixtures by providing a printed circuit board (PCB) for cable testing that facilitates reliable signal conduction and shielding conduction between the cable and the PCB. By setting shielding slots on the PCB, the exposed section of the cable's shielding layer is inserted into the shielding slot along the cable's length. The exposed section of the cable's shielding layer is fixed by being clamped into the shielding slot and makes contact with the shielding contact conductor within the slot to achieve shielding conduction. The exposed section of the cable's signal line can also achieve signal conduction by pressing against the signal contact conductors on the PCB at intervals within the shielding slot after the exposed section of the cable's shielding layer is inserted into the shielding slot. This method utilizes the shielding slots on the PCB to clamp and fix the exposed section of the cable's shielding layer and achieve conductive contact, eliminating the need to press against the exposed section of the cable's shielding layer. Only the exposed section of the cable's signal line needs to be pressed, which does not affect signal conduction. This facilitates operation, reduces the likelihood of poor contact due to operational errors, and helps ensure the reliability of signal conduction and shielding conduction between the cable and the PCB. Attached Figure Description

[0027] Figure 1 This is a schematic diagram showing one side view of the cable testing fixture according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the cable testing fixture from another side, according to an embodiment of the present invention.

[0029] Figure 3 for Figure 1 A schematic diagram showing the connection between the cables and the printed circuit board.

[0030] Figure 4 for Figure 2 A schematic diagram showing the connection between the cables and the printed circuit board.

[0031] Figure 5 for Figure 3 A schematic diagram of the printed circuit board in the diagram;

[0032] Figure 6 for Figure 3 A schematic diagram of the cross-section of the cable.

[0033] In the diagram: 10. Cable; 11. Exposed signal line section; 12. Exposed shielding layer section; 13. First conductor; 14. Second conductor; 20. Printed circuit board; 21. First signal contact conductor; 22. Shielding slot; 23. Second signal contact conductor; 30. Connector; 40. Support base; 41. Upper part; 42. Side part; 43. Lower part; 50. Wire clamping mechanism; 51. Clamping head; 60. Positioning pin. Detailed Implementation

[0034] The cable test fixture of the present application exposes the shielding layer of the cable by setting a shielding clamping groove on the printed board, and the exposed segment of the shielding layer is clamped and fixed in the shielding clamping groove and contacts the shielding contact conductor in the shielding clamping groove to realize shielding conduction, and the exposed segment of the signal line of the cable is in contact with the corresponding signal contact conductor on the printed board to realize signal conduction. The exposed segment of the shielding layer is fixed and contacted by the shielding clamping groove, and it is not necessary to consider pressing the exposed segment of the shielding layer of the cable, only the exposed segment of the signal line of the cable needs to be pressed, which does not affect the signal conduction operation, and is not easy to cause poor contact due to operation deviation, which is beneficial to ensure the reliability of the signal conduction and shielding conduction of the cable and the printed board.

[0035] Embodiments of the cable test fixture of the present application:

[0036] As shown in Figure 1 , the cable test fixture includes a printed board 20, a connector 30, a support seat 40 and a wire pressing mechanism 50, and is used for testing the cable 10 in cooperation with the corresponding test instrument. The printed board 20 is limited by the support seat 40, and in use, the cable 10 is in conductive connection with the printed board 20 and is pressed on the printed board 20 by the wire pressing mechanism 50 installed on the support seat 40, the connector 30 is arranged on the printed board 20 for connecting the corresponding test instrument, so that the cable 10 is in circuit conduction with the corresponding instrument through the printed board 20 and the connector 30.

[0037] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the cable 10 has a signal line exposed segment 11 and a shielding layer exposed segment 12 after being wired, the signal line exposed segment 11 extends to the front side of the shielding layer exposed segment 12 along the extension direction of the cable 10, that is, the length direction, and the printed board 20 is provided with a signal contact conductor for conductive contact with the signal line exposed segment 11 and a shielding contact conductor for conductive contact with the shielding layer exposed segment 12.

[0038] In order to make the printed board 20 and the cable 10 conductive contact reliably, the printed board 20 is provided with a shielding clamping groove 22, the shielding clamping groove 22 is used for clamping the exposed segment 12 of the shielding layer of the cable 10, the shielding clamping groove 22 can clamp the exposed segment 12 of the shielding layer of the cable 10, the shielding contact conductor is arranged on the groove wall of the shielding clamping groove 22, after the exposed segment 12 of the shielding layer of the cable 10 is clamped into the shielding clamping groove 22, the exposed segment 12 of the shielding layer of the cable 10 forms a conductive contact with the shielding contact conductor, and the exposed segment 12 of the shielding layer is fixed by the shielding clamping groove 22 to keep the exposed segment 12 of the shielding layer in contact with the shielding contact conductor. In this way, the exposed segment 12 of the shielding layer of the cable 10 is clamped and fixed by the shielding clamping groove 22 on the printed board 20 and is in conductive contact, without considering the compression of the exposed segment 12 of the shielding layer of the cable 10, only the signal line exposed segment 11 of the cable 10 needs to be compressed, which is convenient to operate, and is not prone to poor contact due to operation deviation, which is beneficial to ensure the reliability of the signal conduction and shielding conduction of the cable 10 and the printed board 20.

[0039] The shielding clamping groove 22 is provided with a side opening on one side in the extension direction, the shielding clamping groove 22 extends to the edge of the printed board to make the side opening located at the edge of the printed board 20, when the exposed segment 12 of the shielding layer of the cable 10 is clamped into the shielding clamping groove 22, the side opening can avoid the exposed segment 12 of the shielding layer of the cable 10 to keep the extension direction of the cable 10, the extension direction of the cable 10 is consistent with the extension direction of the shielding clamping groove 22, which is convenient for cable installation operation. The printed board 20 is provided with a signal contact conductor on the side of the shielding clamping groove 22 away from the side opening, the signal contact conductor is located on the side of the shielding clamping groove 22 away from the side opening in the extension direction, which is convenient for the signal line exposed segment 11 of the cable 10 to contact, the extension direction of the signal contact conductor is consistent with the extension direction of the shielding clamping groove, which can keep the extension direction of the signal line exposed segment 11, and is convenient for wire pressing operation. The signal contact conductor and the shielding contact conductor in the shielding clamping groove 22 are arranged in the extension direction of the shielding clamping groove 22, when the exposed segment 12 of the shielding layer of the cable 10 is clamped into the shielding clamping groove 22, the signal line exposed segment 11 of the cable 10 can naturally extend to the signal contact conductor on one side of the shielding clamping groove 22, the signal line exposed segment 11 of the cable 10 is compressed on the signal contact conductor by the wire pressing mechanism 50 to form a conductive contact, the part of the shielding clamping groove 22 for clamping the exposed segment 12 of the shielding layer constitutes an extension segment for clamping the exposed segment 12 of the shielding layer in the extension direction, after the exposed segment 12 of the shielding layer is clamped into the shielding clamping groove 22, the extension direction of the exposed segment 12 of the shielding layer is the same as the extension direction of the extension segment of the shielding clamping groove 22, so as to ensure the reliability of fixation and contact.

[0040] The shielding clamping groove 22 penetrates through the thickness direction of the printed board 20, which is convenient for processing and manufacturing the shielding clamping groove 22, and can fully utilize the thickness dimension of the printed board 20 to increase the contact area of the shielding clamping groove 22 and the exposed segment 12 of the shielding layer of the cable 10, which is beneficial to clamping and fixing reliably and conductive contact reliably.

[0041] The cable 10 in the embodiment is a microstrip cable, which is combined with Figure 6 As shown in the figure, the cable 10 has two signal lines, which are respectively the first conductor 13 and the second conductor 14, and the first conductor 13 and the second conductor 14 are arranged side by side and make the cable 10 in a flat round shape. The width direction of the cable 10, i.e. the parallel direction of the first conductor 13 and the second conductor 14, is perpendicular to the thickness direction. When installing the cable 10, the cable 10 can be inserted into the shielding slot 22 from the side opening of the shielding slot 22 located at the edge of the printed board 20, and the middle part of the cable 10 in the width direction is inserted into the shielding slot 22, until the front end of the shielding layer exposure section 12 of the cable 10 is on the side wall of the shielding slot 22 away from the side opening, and the cable 10 is limited, at this time, the shielding layer of the cable 10 is located on the two sides of the thickness direction of the shielding layer exposure section 12, and the two side walls of the shielding slot 22 are in close contact with the two side walls of the shielding slot 22, and the two side walls of the shielding slot 22 are provided with shielding contact conductors to ensure reliable shielding conduction. The first conductor 13 and the second conductor 14 of the cable 10 are located in the signal line exposure section 11 and extend to the two sides of the thickness direction of the printed board 20 and are located on one side of the shielding slot 22 without contacting the shielding contact conductor. In order to facilitate the first conductor 13 and the second conductor 14 extending to the two sides of the thickness direction of the printed board 20 to form signal conduction with the printed board 20, the two side surfaces of the printed board 20 are provided with signal contact conductors for contacting the two signal lines of the cable 10, that is, the one side surface of the printed board 20 is provided with the first signal contact conductor 21 for conducting electricity with the first conductor 13, and the other side surface is provided with the second signal contact conductor 23 for conducting electricity with the second conductor 14, which is convenient for adapting the position of the conductor.

[0042] The support seat 40 is provided with a wire pressing mechanism 50 on the two sides of the thickness direction of the printed board 20, one of which is used to press the part of the first conductor 13 located in the signal line exposure section 11 on the first signal contact conductor 21, and the other is used to press the part of the second conductor 14 located in the signal line exposure section 11 on the second signal contact conductor 23. The two wire pressing mechanisms 50 are symmetrically arranged on the two sides of the printed board 20, which is conducive to reliable signal conduction and uniform stress.

[0043] The printed board 20 is vertically installed on the support seat 40, and the thickness direction of the printed board 20 is perpendicular to the up-down direction. The support seat 40 is provided with a mounting slot for the vertical installation of the printed board 20 on the support seat 40, so that the printed board 20 is vertically arranged, and the position of the wire pressing mechanism 50 pressing the conductor can be observed. The wire pressing mechanism 50 can adopt a quick clamp, which is a mature product and will not be described here. The wire pressing mechanism 50 has a pressing head 51 pressing on the conductor, and the pressing head 51 is a square block which can be made of low-loss plastic material.

[0044] The support base 40 comprises an upper portion 41 and a lower portion 43 spaced apart in the up-down direction and a side portion 42, the same ends of the upper portion 41 and the lower portion 43 are connected by the side portion 42 and the other ends are spaced apart, and two crimping mechanisms 50 are installed on the upper portion 41 for facilitating operation. The upper portion 41 and the lower portion 43 of the support base 40 are respectively provided with mounting grooves on opposite sides, and the mounting grooves of the upper portion 41 and the lower portion 43 are oppositely arranged. The side of the mounting groove away from the side portion 42 in the extending direction is provided with a mounting opening for vertically mounting the printed board 20. The mounting grooves of the upper portion 41 and the lower portion 43 respectively limit the upper and lower two side edges of the printed board 20. The space between the upper portion 41 and the lower portion 43 of the support base 40 can expose the shielding card slot 22, the signal contact conductor and the connector 30 of the printed board 20, so as to facilitate the crimping operation and the connector 30 insertion operation. The upper portion 41 of the support base 40 is downwardly provided with a boss, and the lower portion 43 is upwardly provided with a boss. The bosses of the upper portion 41 and the lower portion 43 are respectively located on the two sides of the printed board 20. The bosses are provided with positioning holes, and the printed board 20 is provided with matching holes. After the printed board 20 is inserted into the support base 40, the positioning and fixing of the printed board 20 can be realized by respectively penetrating and mounting positioning pins 60 on the bosses of the upper portion 41 and the lower portion 43 of the support base 40.

[0045] The printed board 20 is respectively provided with a connector 30 on the two side surfaces, so as to respectively connect two wires through the wire metal conductor on the printed board 20. The connector 30 can adopt an SMA radio frequency connector 30. The vertically arranged printed board 20 is also convenient for the connection operation of the two side connectors 30 with the corresponding test instrument. The two side connectors 30 are arranged staggered on the printed board 20, so as to facilitate the arrangement of two connectors 30 on the printed board 20. The first signal contact conductor 21 and the second signal contact conductor 23 are surface wire metals arranged on the printed board 20. The shielding contact conductor is a metal plating layer, which is convenient for manufacturing.

[0046] In other embodiments, when the thickness of the printed board is sufficient, the shielding card slot can also not be a through slot along the thickness direction of the printed board. The shielding card slot has a groove bottom towards one side of the thickness direction of the printed board. At this time, the first signal contact conductor and the second signal contact conductor are arranged on the same side surface of the printed board, and the two connectors are also arranged on the same side surface of the printed board. One crimping mechanism is arranged.

[0047] In other embodiments, the first signal contact conductor and the second signal contact conductor can also be arranged on the same side surface of the printed board. At this time, a through hole needs to be arranged on the printed board, so that one wire passes through the through hole from one side of the printed board to the other side, and then forms a conductive contact with the other wire on the same side surface of the printed board.

[0048] In other embodiments, the support seat can also be a support seat on which the printed board is placed horizontally, and an upward support boss is arranged on the support seat, and the line pressing mechanism is only one, and after the printed board is placed on the support seat, the support boss is supported on the part of the second lead wire located at the signal line exposed section, and the part of the first lead wire located at the signal line exposed section is pressed by the line pressing mechanism.

[0049] In other embodiments, the support seat can also not be provided with an upper part, and the line pressing mechanism is installed on the side part.

[0050] In other embodiments, the shielding contact conductor can also be a metal sheet fixed on the slot wall of the shielding slot.

[0051] In other embodiments, the shielding slot can also be a groove without a side opening, so that the shielding layer exposed section is bent and clamped into the shielding slot, and the shielding layer exposed section extends along the extension direction of the shielding slot.

[0052] In other embodiments, the signal contact conductor is arranged on one side of the printed board in the slot width direction of the shielding slot, so that the lead wire has sufficient length and can contact the signal contact conductor.

[0053] In other embodiments, the extension direction of the signal contact conductor and the extension direction of the shielding slot can also be arranged at an angle.

[0054] Embodiment of the printed board for cable testing of the present application:

[0055] The printed board for cable testing in the present embodiment is the same as the printed board in the embodiment of the cable testing fixture described above, and will not be described again here.

[0056] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified without creative labor, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cable testing fixture comprising a support base (40) and a printed board (20), characterized in that, The printed board (20) is provided with a shielding slot (22) penetrating in the thickness direction of the printed board (20), the shielding slot (22) has an extension section for the shielding layer exposure section (12) of the cable (10) to be clamped along the extension direction of the shielding slot (22), the printed board (20) is provided with a signal contact conductor for the signal line exposure section (11) of the cable (10) to be pressed by the wire pressing mechanism (50) at a position spaced from the shielding slot (22), the printed board (20) is provided with a signal contact conductor on each side surface for contacting two signal lines of the cable (10), the support base (40) is provided with a wire pressing mechanism (50) on each side in the thickness direction of the printed board (20), the slot wall of the shielding slot (22) is provided with a shielding contact conductor for contacting the shielding layer exposure section (12), the support base (40) comprises an upper part (41) and a lower part (43) spaced in the vertical direction, the opposite sides of the upper part (41) and the lower part (43) are respectively provided with mounting slots, the mounting slots of the upper part (41) and the lower part (43) are oppositely arranged, one side of the extension direction of the mounting slots is provided with a mounting opening for the printed board (20) to be vertically mounted, and a space is formed between the upper part (41) and the lower part (43) of the support base (40) for the shielding slot (22) and the signal contact conductor of the printed board (20) to be exposed.

2. The cable test fixture of claim 1, wherein, The same side surface of the printed board (20) is provided with two signal contact conductors for contacting two signal lines of the cable (10) respectively.

3. The cable testing fixture of claim 1 or 2, wherein, The shielding slot (22) extends to the edge of the printed board to form a side opening for the shielding layer exposure section (12) of the cable (10) to avoid when clamped into the shielding slot (22).

4. The cable test fixture of claim 3, wherein, The signal contact conductor is arranged on the printed board (20) at a position away from the side opening of the shielding slot (22).

5. The cable testing fixture of claim 1 or 2, wherein, The extension direction of the signal contact conductor is consistent with the extension direction of the shielding slot (22).

6. The cable test fixture of claim 1 or 2, wherein, The shielding contact conductor is a metal plating layer.

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