Cable test clamp

Abstract

The utility model provides a cable testing clamp, which relates to the technical field of cable testing and comprises a bottom plate, a circuit board is arranged on the upper side of the bottom plate, a signal line is arranged on the circuit board, one end of the signal line forms a connecting part at one end of the circuit board, and the connecting part is used for being electrically connected with a conductive part of a tested cable; the clamping structure is arranged at the end, close to the connecting part, of the bottom plate, the clamping structure comprises a pair of clamping blocks, clamping grooves are formed in the sides, close to each other, of the clamping blocks, and the clamping grooves are used for containing the tested cable and can limit the tested cable; the crimping block is arranged above the bottom plate in a liftable manner, and the crimping block is used for crimping the conductive part on the upper side of the connecting part on the connecting part; the problem that in the prior art, due to limitation of the performance of a cable testing clamp, the testing precision of a tested cable is affected is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable testing, and more specifically, relates to a cable testing fixture. Background Art

[0002] With the storage and transmission of big data and the doubling of data rates in modern high-speed cables, the manufacturing and testing of high-speed bulk cables have become particularly important.

[0003] The current testing of high-speed original cables has been a problem for all high-speed cable manufacturers, making the improvement of high-speed cable speed performance a major problem. When the test frequency is as high as 20GHz or above, especially when the single-channel rate is as high as 25.89GbpsEthernet, 28Gbps NRZ, 56Gbps PAM4, 112Gbps PAM4, or even 200Gbps PAM4, the test accuracy of the tested cable is easily affected due to the performance limitations of the cable test fixture, such as the impedance fault problem. As a result, high-speed cable manufacturers are unable to accurately control the improvement of high-speed cable manufacturing capabilities. Utility Model Content

[0004] The utility model aims to provide a cable test fixture to solve the problem that the test accuracy of the tested cable is affected by the limitation of the performance of the cable test fixture in the prior art.

[0005] In order to achieve the above object, the utility model provides a cable test fixture, comprising:

[0006] A bottom plate, a circuit board is arranged on the upper side of the bottom plate, a signal line is arranged on the circuit board, one end of the signal line forms a connecting portion at one end of the circuit board, and the connecting portion is used to be electrically connected to the conductive portion of the cable under test;

[0007] A clamping structure, the clamping structure is arranged at one end of the bottom plate close to the connecting portion, the clamping structure comprises a pair of clamping blocks, a clamping groove is arranged on one side of the pair of clamping blocks close to each other, the clamping groove is used to accommodate the cable under test and can limit the position of the cable under test;

[0008] A crimping block is movably disposed above the bottom plate, and is used to crimp the conductive portion located on the upper side of the connecting portion onto the connecting portion.

[0009] Optionally, a pair of signal lines are provided, and the pair of signal lines extend from one end of the circuit board to the other end of the circuit board. A pair of connecting parts located at one end of the circuit board are arranged adjacent to each other, and the distance between the two matches the distance between the two conductive parts of the cable under test.

[0010] Optionally, the other ends of the pair of signal lines located at the other end of the circuit board are separately arranged, and the separated parts of the pair of signal lines extend to the other end of the circuit board in a relatively arranged arc shape.

[0011] Optionally, the other ends of the pair of signal lines are electrically connected to a connector connected to the circuit board.

[0012] Optionally, the distance between a pair of the connecting parts is 0.4 mm to 1.2 mm.

[0013] Optionally, the clamping structure also includes two extension portions and a first driving mechanism, the extension portion extends outward along one end of the base plate, and a receiving groove is formed between the two extension portions, a pair of the clamping blocks are movably arranged in the receiving groove, and the first driving mechanism is used to drive the pair of the clamping blocks to move toward and in opposite directions.

[0014] Optionally, the first driving mechanism includes two telescopic components, the two telescopic components are respectively connected to the two extension parts, and the telescopic ends of the two telescopic components are respectively connected to the two clamping blocks.

[0015] Optionally, a guide column is connected between the two extension parts, and guide holes are provided inside the two clamping blocks. The guide holes are sleeved on the outside of the guide column, and the clamping block is slidably matched with the guide column.

[0016] Optionally, a bracket is provided on the upper side of the base plate, the bracket is connected to a cross beam, a guide groove is provided in the cross beam, a connecting block is provided on the upper side of the cross beam, a transmission block is connected to the lower side of the connecting block, the transmission block is slidably arranged in the guide groove, a slide groove is provided inside the transmission block, the crimping block is slidably arranged in the slide groove, and a first elastic component is provided between the crimping block and the transmission block, a second elastic component is provided between the connecting block and the cross beam, a second driving mechanism is provided on the bracket, the second driving mechanism is connected to the bracket and the connecting block, and is used to drive the connecting block to rise and fall.

[0017] Optionally, the second driving mechanism includes a support seat, a handle, a connecting plate and a telescopic column, one side of the support seat is connected to the bracket, and the other side of the support seat is spaced apart with a raised first supporting portion and a second supporting portion, the handle is in a broken line shape, one end of the handle is hinged to the first supporting portion, and a turning point of the handle is hinged to one end of the connecting plate, the telescopic column is slidably arranged in the second supporting portion, the other end of the connecting plate is hinged to one end of the telescopic column, the other end of the handle forms an operating portion, and the other end of the telescopic column forms a pressing portion, and the pressing portion is used to press down the connecting block.

[0018] The utility model provides a cable testing fixture, which has the beneficial effects that: the cable testing fixture is provided with a circuit board on the upper side of a bottom plate, one end of a signal line on the circuit board forms a connection portion for electrically connecting to a conductive portion of a tested cable, and the other end is used to connect a test device, the arrangement of the clamping structure can realize the clamping and limiting of the tested cable by a pair of closed clamping grooves through the relative movement of a pair of clamping blocks, a section of the tested cable close to its conductive portion is limited to avoid shaking, the stability during the test can be effectively improved, the impedance can be reduced, the impedance can be controlled within + / -5ohms, and the test accuracy of the tested cable is improved, so that high-speed cable manufacturers can accurately control the improvement of high-speed cable manufacturing capabilities.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0021] Figure 1 A schematic diagram of the appearance and structure of a high-speed cable test fixture according to an embodiment of the utility model is shown.

[0022] Figure 2 A schematic diagram of the top structure of the upper side of a base of a high-speed cable test fixture according to an embodiment of the utility model is shown.

[0023] Figure 3 A schematic diagram of a cross-sectional structure of a high-speed cable test fixture according to an embodiment of the utility model is shown.

[0024] Figure 4 Shows Figure 2 A partial enlarged schematic diagram of .

[0025] Description of reference numerals:

[0026] 1. Bottom plate; 2. Circuit board; 3. Signal line; 4. Connecting part; 5. Conductive part; 6. Clamping block; 7. Crimping block; 8. Connector; 9. Telescopic part; 10. Bracket; 11. Crossbeam; 12. Connecting block; 13. Transmission block; 14. First elastic part; 15. Second elastic part; 16. Support seat; 17. Handle; 18. Connecting piece; 19. Telescopic column; 20. Adjusting rod. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0028] like Figures 1 to 4 As shown, the utility model provides a cable testing fixture, comprising:

[0029] A bottom plate 1, a circuit board 2 is arranged on the upper side of the bottom plate 1, a signal line 3 is arranged on the circuit board 2, one end of the signal line 3 forms a connecting portion 4 at one end of the circuit board 2, and the connecting portion 4 is used to be electrically connected to a conductive portion 5 of a cable under test;

[0030] A clamping structure, the clamping structure is arranged at one end of the bottom plate 1 close to the connecting portion 4, the clamping structure comprises a pair of clamping blocks 6, and a clamping groove is arranged on one side of the pair of clamping blocks 6 close to each other, the clamping groove is used to accommodate the cable under test, and can limit the position of the cable under test;

[0031] The crimping block 7 is liftably disposed above the bottom plate 1 , and is used to crimp the conductive part 5 located on the upper side of the connecting part 4 onto the connecting part 4 .

[0032] Specifically, in order to solve the problem in the prior art that the performance limitation of the cable test fixture affects the test accuracy of the cable under test, the cable test fixture provided by the utility model is provided with a circuit board 2 on the upper side of the base plate 1, and one end of the signal line 3 on the circuit board 2 forms a connecting part 4 for electrically connecting to the conductive part 5 of the cable under test, and the other end is used to connect the test equipment. The setting of the clamping structure can realize the clamping and limiting of the cable under test by a pair of closed clamping grooves through the relative movement of a pair of clamping blocks 6. After a section of the cable under test close to its conductive part 5 is limited, it can avoid its shaking, which can effectively improve the stability during the test and reduce the impedance. The impedance can be controlled within + / -5ohms, thereby improving the test accuracy of the cable under test, so that high-speed cable manufacturers can accurately control the improvement of high-speed cable manufacturing capabilities.

[0033] Furthermore, each clamping block 6 is provided with a clamping groove. When the two clamping blocks 6 move toward each other and contact each other, the two clamping grooves are connected to each other to form a hole-like structure. The hole-like structure matches the shape of the cable under test, and just limits the cable under test in the hole-like structure, thereby realizing the positioning of the cable under test.

[0034] In this embodiment, a board groove is provided on the upper side of the bottom plate 1, the cable board is a PCB board, and the circuit board 2 is embedded in the board groove and fixed by screws.

[0035] Optionally, a pair of signal lines 3 are provided, and the pair of signal lines 3 extend from one end of the circuit board 2 to the other end of the circuit board 2. A pair of connecting parts 4 located at one end of the circuit board 2 are arranged adjacent to each other, and the distance between the two matches the distance between the two conductive parts 5 of the cable under test.

[0036] Specifically, the utility model involves two signal lines 3, which can be used to test differential lines, or only one signal line 3 can be used to test single-ended lines, and has a wide range of applications; two connecting parts 4 of a section of a pair of signal lines 3 are arranged adjacent to each other, and the spacing between the two is matched with the spacing between two conductive parts 5 of a cable under test, so that the two conductive parts 5 exposed after the insulation of the cable under test is stripped off can just be placed on the upper sides of the two connecting parts 4 respectively, and there is no need to manually pry apart the two conductive parts 5 to increase the spacing between them, thereby avoiding electrical performance problems caused by prying apart the two conductive parts 5 to increase the spacing between them and then testing. The utility model sets the spacing between the two connecting parts 4 so that the insertion loss can be linear to above 67GHz.

[0037] Optionally, the other ends of the pair of signal lines 3 located at the other end of the circuit board 2 are separated, and the separated parts of the pair of signal lines 3 extend to the other end of the circuit board 2 in an arc-shaped trend that is relatively set.

[0038] In this embodiment, the bottom plate 1 is made of conductive material, the PCB board is fully coated with gold, and is electrically connected to the bottom plate 1. The PCB board is fully coated with gold as a prior art, and its structure and technical requirements are not repeated. After the PCB board is fully coated with gold and placed in the board slot, the PCB board and the metal part of the bottom plate 1 fit tightly to facilitate a complete transition to the nearest ground, thereby achieving the continuity of the impedance of the original cable connected to the PCB board and avoiding distortion of the test parameters; the distance L1 between the signal line 3 at one end of the PCB board and the gold-coated edge of the PCB board is 0.2mm~0.3mm; the distance L2 between the signal line 3 at the other end of the PCB board and the gold-coated edge of the PCB board is 0.2mm~0.3mm; The distance L2 is 0.2mm~0.3mm to avoid impedance breakpoints; a plurality of grounding holes are provided on the PCB board, and a portion of the plurality of grounding holes are evenly distributed along both sides of the signal line 3 and along the extension direction of the signal line 3 to facilitate transition to the connector 8 or the termination of the cable under test, thereby ensuring the coplanarity of the signal, ensuring that the signal impedance is well controlled, meeting the test requirements, and avoiding impedance discontinuity; the distance L3 between each two adjacent grounding holes is not greater than 0.6mm, and the distance L4 between each grounding hole and the copper-clad edge of the signal line 3 adjacent to it is less than 0.1mm and greater than 0; the copper-clad rules for the signal line 3 are prior art and will not be repeated.

[0039] Optionally, the other ends of the pair of signal lines 3 are electrically connected to a connector 8 connected to the circuit board 2 .

[0040] Specifically, the two signal lines 3 are respectively connected to a connector 8 so as to be connected to the test equipment through the connector 8 .

[0041] In this embodiment, the connector 8 is screwed to the circuit board 2 .

[0042] Optionally, the distance between a pair of connecting parts 4 is 0.4 mm to 1.2 mm.

[0043] Specifically, the spacing between the pair of connecting parts 4 at one end of a pair of signal lines 3 is set to 0.4 mm to 1.2 mm to achieve cooperation with the two conductive parts 5 of the cable under test, so that the two conductive parts 5 can overlap with the two connecting parts 4 without being broken apart.

[0044] In this embodiment, the conductive portion 5 is the inner core of the tested cable exposed after the insulation is stripped off.

[0045] Optionally, the clamping structure also includes two extension parts and a first driving mechanism, the extension part extends outward along one end of the base plate 1, and a receiving groove is formed between the two extension parts, a pair of clamping blocks 6 are movably arranged in the receiving groove, and the first driving mechanism is used to drive a pair of clamping blocks 6 to move toward and in opposite directions.

[0046] Specifically, one end of the base plate 1 is provided with two extension parts extending outward, and a receiving groove is formed between the two extension parts, which can accommodate the two clamping blocks 6 to move toward and in opposite directions therein. The movement of the two clamping blocks 6 is driven by the first driving mechanism to achieve clamping and limiting of the cable under test through the clamping groove.

[0047] Optionally, the first driving mechanism includes two telescopic components 9 , the two telescopic components 9 are respectively connected to the two extension parts, and the telescopic ends of the two telescopic components 9 are respectively connected to the two clamping blocks 6 .

[0048] Specifically, the first driving mechanism drives the two clamping blocks 6 to move respectively through the two telescopic components 9, and drives the clamping blocks 6 to move in the accommodating groove through the extension and retraction of the telescopic ends of the telescopic components 9.

[0049] In this embodiment, the telescopic component 9 is a rotating telescopic part with a scale on a micrometer.

[0050] Optionally, a guide column is connected between the two extensions, and guide holes are provided inside the two clamping blocks 6. The guide holes are sleeved on the outside of the guide column, and the clamping blocks 6 are slidably matched with the guide column.

[0051] Specifically, through the cooperation between the guide column and the guide hole, the moving direction of the clamping block 6 can be guided, so that the two clamping blocks 6 can move towards and in opposite directions.

[0052] In this embodiment, two guide columns are provided, and a spring hole is provided at one end of the two clamping blocks 6 close to each other, a spring is provided between the two clamping blocks 6, and both ends of the spring are provided in the spring hole. The spring applies an elastic force to the two clamping blocks 6 so that the two clamping blocks 6 move in opposite directions.

[0053] Optionally, a bracket 10 is provided on the upper side of the base plate 1, the bracket 10 is connected to a cross beam 11, a guide groove is provided in the cross beam 11, a connecting block 12 is provided on the upper side of the cross beam 11, a transmission block 13 is connected to the lower side of the connecting block 12, the transmission block 13 is slidably arranged in the guide groove, a slide groove is arranged inside the transmission block 13, the crimping block 7 is slidably arranged in the slide groove, and a first elastic component 14 is provided between the crimping block 7 and the transmission block 13, a second elastic component 15 is provided between the connecting block 12 and the cross beam 11, and a second driving mechanism is provided on the bracket 10, the second driving mechanism is connected to the bracket 10 and the connecting block 12, and is used to drive the connecting block 12 to rise and fall.

[0054] Specifically, the first elastic component 14 is in a pre-compression state. The setting of the first elastic component 14 enables the downward pressure to be provided by the elastic force of the first elastic component 14 when the second driving mechanism drives the connecting block 12 to descend and uses the crimping block 7 to press the conductive part 5 on the upper side of the connecting part 4. By setting the elastic coefficient of the first elastic component 14, the crimping force between the conductive part 5 and the connecting part 4 can be conveniently controlled, thereby solving the problem of excessive wear of the connecting part 4 on the circuit board 2 due to crimping the conductive part 5 of the tested cable, and increasing the number of times the circuit board 2 can be tested and used, ensuring that it can be crimped at least 10,000 times without obvious wear; the second elastic component 15 is used to drive the connecting plate to move upward after the second driving mechanism releases the downward pressure on the connecting plate, so that the connecting block 12 and the crimping block 7 can be automatically lifted and reset.

[0055] In this embodiment, the bracket 10 is in a door shape, and the first elastic component 14 and the second elastic component 15 are both compression springs.

[0056] In this embodiment, the slide groove is a through groove, and a limiting plate is provided on the side of the transmission block 13 away from the connecting block 12. The outer edge of the limiting plate protrudes outward from the transmission block 13 to form a first limiting portion that cooperates with the cross beam 11. The inner edge of the limiting plate protrudes inward from the inner periphery of the slide groove of the transmission block 13 to form a second limiting portion. The outer periphery of the crimping block 7 is provided with a third limiting portion that protrudes outward, and the third limiting portion cooperates with the second limiting portion.

[0057] Optionally, the second driving mechanism includes a support seat 16, a handle 17, a connecting piece 18 and a telescopic column 19, one side of the support seat 16 is connected to the bracket 10, and the other side of the support seat 16 is spaced apart with a raised first supporting portion and a second supporting portion, the handle 17 is in a broken line shape, one end of the handle 17 is hinged to the first supporting portion, the turning point of the handle 17 is hinged to one end of the connecting piece 18, the telescopic column 19 is slidably inserted into the second supporting portion, the other end of the connecting piece 18 is hinged to one end of the telescopic column 19, the other end of the handle 17 forms an operating portion, and the other end of the telescopic column 19 forms a pressing portion, which is used to press down the connecting block 12.

[0058] Specifically, by operating the operating part of the handle 17, the handle 17 can be rotated around the hinge between one end thereof and the first support part, thereby driving the connecting piece 18 to pull up or press down the telescopic column 19, so that the telescopic column 19 can move up and down, and then when the crimping block 7 is needed to crimp the conductive part 5 and the connecting part 4, the connecting plate can be pressed down.

[0059] In this embodiment, the handle 17 is L-shaped, the second support portion is cylindrical, the telescopic column 19 is slidably disposed inside the second support portion, and the lower end of the telescopic column 19 is threadedly connected to the adjustment rod 20 .

[0060] In summary, when the cable testing fixture provided by the utility model is used, a test of a high-speed original cable is taken as an example: first, the tested cable is passed through the gap between the two clamping blocks 6, and the two conductive parts 5 exposed at the ends of the tested cable are respectively placed on the connecting parts 4 of the two signal lines 3; then the two telescopic parts 9 are operated to make the two clamping blocks 6 move toward each other, so as to limit the tested cable through the clamping groove; then the handle 17 is operated to make the telescopic column 19 press down the connecting block 12, and then the lower end of the crimping block 7 is crimped on the upper side of the two conductive parts 5, so that the conductive part 5 is in full contact with the connecting part 4; finally, the signal line 3 on the circuit board 2 is connected to the test equipment through the connector 8, and then the performance of the high-speed original cable is tested.

[0061] The above description of various embodiments of the utility model is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A cable test fixture, characterized in that: include: A bottom plate, a circuit board is arranged on the upper side of the bottom plate, a signal line is arranged on the circuit board, one end of the signal line forms a connecting portion at one end of the circuit board, and the connecting portion is used to be electrically connected to the conductive portion of the cable under test; A clamping structure, the clamping structure is arranged at one end of the bottom plate close to the connecting portion, the clamping structure comprises a pair of clamping blocks, a clamping groove is arranged on one side of the pair of clamping blocks close to each other, the clamping groove is used to accommodate the cable under test and can limit the position of the cable under test; A crimping block is movably disposed above the bottom plate, and is used to crimp the conductive portion located on the upper side of the connecting portion onto the connecting portion.

2. The cable test fixture according to claim 1, characterized in that: A pair of signal lines are provided, and the pair of signal lines extend from one end of the circuit board to the other end of the circuit board. A pair of connecting parts located at one end of the circuit board are arranged adjacent to each other, and the distance between the two is matched with the distance between the two conductive parts of the cable under test.

3. The cable test fixture according to claim 2, characterized in that: The other ends of the pair of signal lines located at the other end of the circuit board are separated, and the separated parts of the pair of signal lines extend to the other end of the circuit board in an arc-shaped trend that is relatively arranged.

4. The cable test fixture according to claim 3, characterized in that: The other ends of the pair of signal lines are electrically connected to a connector connected to the circuit board.

5. The cable testing fixture according to claim 2, characterized in that: The distance between the pair of connecting parts is 0.4 mm to 1.2 mm.

6. The cable testing fixture according to claim 1, characterized in that: The clamping structure also includes two extension parts and a first driving mechanism. The extension part extends outward along one end of the base plate, and a receiving groove is formed between the two extension parts. A pair of clamping blocks are movably arranged in the receiving groove. The first driving mechanism is used to drive the pair of clamping blocks to move toward and in opposite directions.

7. The cable testing fixture according to claim 6, characterized in that: The first driving mechanism comprises two telescopic components, the two telescopic components are respectively connected to the two extending parts, and the telescopic ends of the two telescopic components are respectively connected to the two clamping blocks.

8. The cable testing fixture according to claim 6, characterized in that: A guide column is connected between the two extension parts, and guide holes are arranged inside the two clamping blocks. The guide holes are sleeved on the outer sides of the guide columns, and the clamping blocks are slidably matched with the guide columns.

9. The cable testing fixture according to claim 1, characterized in that: A bracket is provided on the upper side of the base plate, the bracket is connected to a cross beam, a guide groove is provided in the cross beam, a connecting block is provided on the upper side of the cross beam, a transmission block is connected to the lower side of the connecting block, the transmission block is slidably arranged in the guide groove, a slide groove is arranged inside the transmission block, the crimping block is slidably arranged in the slide groove, and a first elastic component is provided between the crimping block and the transmission block, a second elastic component is provided between the connecting block and the cross beam, a second driving mechanism is provided on the bracket, the second driving mechanism is connected to the bracket and the connecting block, and is used for driving the connecting block to rise and fall.

10. The cable testing fixture according to claim 9, characterized in that: The second driving mechanism includes a support seat, a handle, a connecting piece and a telescopic column. One side of the support seat is connected to the bracket, and the other side of the support seat is spaced apart with a raised first supporting portion and a second supporting portion. The handle is in a broken line shape, one end of the handle is hinged to the first supporting portion, and the turning point of the handle is hinged to one end of the connecting piece. The telescopic column is slidably arranged in the second supporting portion, and the other end of the connecting piece is hinged to one end of the telescopic column. The other end of the handle forms an operating portion, and the other end of the telescopic column forms a pressing portion, and the pressing portion is used to press down the connecting block.

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