An impedance adjustable test connector

Abstract

The present invention relates to the technical field of connector connection, and specifically to an impedance adjustable test connector, comprising a shell, an outer conductor and a central conductor one arranged on the shell, and further comprising: an insulating support arranged in the shell, a resistor one and a resistor two are arranged on the insulating support, and the resistor one and the central conductor one are electrically connected, and a switch is arranged on the shell; the central conductor two comprises a fixed disk arranged on the insulating support, a turntable is rotatably mounted on the fixed disk, and a spring spring is arranged between the fixed disk and the turntable, an arc guide groove is arranged on the turntable, a guide disk is arranged on the fixed disk, and a guide straight groove is arranged on the guide disk, and an extrusion member is elastically mounted on the guide disk; a clamping claw comprises a clamping plate slidably mounted on the guide disk, and a guide column is arranged on the clamping plate, a wavy conductive member is slidably mounted on the bottom of the clamping plate, and a reset assembly for preventing excessive deformation of the wavy conductive member is arranged on the top of the clamping plate. The present invention facilitates impedance testing of cables, and the attenuation of the test cable is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of connector connection, and in particular to an impedance-adjustable test connector. Background Art

[0002] An adjustable impedance test connector is a connector that can change the impedance value between connecting cables or circuit components. By adjusting the settings or parameters inside the connector, users can achieve precise control of the impedance to meet different test requirements.

[0003] The working principle of the impedance adjustable test connector is mainly based on the impedance characteristics of circuit components (such as capacitors, inductors, resistors, etc.). By changing the parameters or connection methods of these components, the overall impedance value of the connector can be adjusted. Some advanced adjustable test connectors also use adjustable components such as variable resistors or inductors to allow users to adjust the impedance value in real time.

[0004] In the test of microwave system components, the input impedance of the network analyzer is 50 ohms, while the output impedance of the system under test is not necessarily 50 ohms. Some are 75 ohms and some are 25 ohms. As a result, the conventional test connector cannot adapt to the output impedance of different systems under test, making it unable to match the 50 ohm input impedance of the network analyzer, which can easily lead to inaccurate measurement of various electrical performance parameters such as attenuation and standing wave. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an impedance-adjustable test connector, which can effectively solve the problem in the prior art that the test connector cannot match the input impedance of the network analyzer, which easily leads to inaccurate measured parameters.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an impedance adjustable test connector, comprising a housing, an outer conductor arranged on one side of the housing, and a central conductor arranged on the housing and extending into the outer conductor, and further comprising:

[0008] An insulating support member is arranged in the housing, a resistor 1 and a resistor 2 are arranged on the insulating support member, and the resistor 1 is electrically connected to the central conductor 1, and a switch for controlling the connection of the resistor 1 and the resistor 2 is arranged on the housing;

[0009] The second center conductor comprises a fixed disk arranged on an insulating support, a rotating disk is rotatably mounted on the fixed disk, a spring is arranged between the fixed disk and the rotating disk, an arc guide groove is arranged on the rotating disk, a guide disk covering the rotating disk is arranged on the fixed disk, a guide straight groove is arranged on the guide disk, and an extrusion piece is elastically mounted on the guide disk;

[0010] And a clamping claw, the clamping claw includes a clamping plate slidably mounted on the guide disk, and the clamping plate is provided with a guide column extending into the arc guide groove, a wavy conductive part is slidably mounted on the bottom of the clamping plate, and a reset component is provided on the top of the clamping plate for preventing the wavy conductive part from excessive deformation and elastic failure.

[0011] Furthermore, a rotating column is provided on the rotating disk, and the rotating column is rotatably mounted on the fixed disk, one end of the clockwork spring is arranged on the rotating column, and the other end is arranged on the inner wall of the shell.

[0012] Furthermore, the arc-shaped guide grooves are provided in multiple groups and distributed in a circular array on the turntable, and one end of the arc-shaped guide groove is close to the edge of the turntable and the other end is close to the center of the turntable.

[0013] Furthermore, the number of the guide straight grooves corresponds to the arc guide grooves, and multiple groups of guide straight grooves are distributed in an annular array on the guide plate, a fixed sleeve is coaxially mounted on the guide plate, and the extrusion piece is slidably connected to the fixed sleeve, a spring is provided between the fixed sleeve and the rotating column, and the two ends of the spring respectively resist the rotating column and the extrusion piece.

[0014] Furthermore, a contact piece is provided on the side of the extrusion piece away from the guide plate. The contact piece is funnel-shaped and has friction particles on its surface. The friction card is used to increase the friction between the workpiece to be detected and the contact piece.

[0015] Furthermore, the clamping claws are provided with a plurality of groups corresponding to the number of the guide straight grooves, and a fixing piece is slidably mounted on one end of the clamping plate away from the guide column, and movable rings are mounted on the plurality of groups of the fixing pieces.

[0016] Furthermore, the wavy conductive member is slidably mounted on the bottom of the clamping plate, and one end of the wavy conductive member away from the guide column is connected to the fixing member.

[0017] Furthermore, the reset assembly comprises a sealing cylinder and a movable ring, wherein the sealing cylinder is arranged on the top of the clamping plate, and a piston column is arranged on the sealing cylinder, and one end of the piston column away from the sealing cylinder is connected to the movable ring.

[0018] Beneficial Effects

[0019] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] 1. The switch is matched with the resistor 1 and the resistor 2 on the insulating support. When the resistor 1 is short-circuited and the resistor 2 is open-circuited, the resistor does not work, and the original impedance of the cable under test is maintained, which is convenient for impedance testing of the cable. When the resistor 1 is connected in series and the resistor 2 is connected in parallel, an impedance matching network is realized, and the components of the cable under test are converted into standard ohms, which is convenient for testing the attenuation of the cable and the test results are more accurate.

[0021] Second, the workpieces to be tested of different sizes are fixedly clamped and electrically connected by means of the clamping claws in cooperation with the wavy conductive parts. When the inner conductor diameter of the workpiece to be tested is smaller than the gap between the multiple sets of clamping claws, during installation, the workpiece is inserted into the housing and the extrusion part is squeezed, so that the extrusion part is inserted into the rotating column. Then, when the workpiece to be tested is rotated, the turntable rotates and guides the guide column to slide in the arc guide groove. At this time, due to the limitation of the guide straight groove on the guide plate, the multiple sets of clamping claws move toward the center at the same time, and then the inner conductor of the workpiece is clamped and fixed in cooperation with the wavy conductive parts. When the inner conductor diameter of the workpiece to be tested is larger than the gap between the multiple sets of clamping claws, the workpiece will be squeezed into the multiple sets of clamping claws under the guidance of the fixing parts when entering. At this time, the wavy conductive parts will be deformed and tend to be horizontal due to the squeezing, which is convenient for clamping workpieces of different models and has a wider applicability.

[0022] 3. When the conductor inside the workpiece is large, the fixing part will be squeezed and pull the piston column away from the sealing cylinder. The inside of the sealing cylinder is in a negative pressure state. When the workpiece inspection is completed, the piston column will be sucked back into the sealing cylinder, thereby driving the fixing part to squeeze the wavy conductive part, effectively preventing the excessive deformation of the wavy conductive part from causing elastic failure, making the clamping process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 It is a schematic diagram of the explosion structure of the second central conductor of the present invention;

[0028] Figure 5 A partial cross-sectional view of the clamping jaw of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the insulating support member of the present invention;

[0030] Figure 7 This is a circuit diagram of the connection between resistor 1, resistor 2 and a switch of the present invention.

[0031] Figure numerals: 1. outer shell; 2. center conductor 2; 21. fixed disk; 22. clockwork spring; 23. turntable; 231. rotating column; 232. arc guide groove; 24. guide disk; 241. guide straight groove; 242. fixed sleeve; 243. extrusion piece; 2431. spring; 25. clamping claw; 251. clamping plate; 252. guide column; 253. wavy conductive part; 254. sealing cylinder; 255. piston column; 256. movable ring; 257. fixing part; 3. outer conductor; 4. center conductor 1; 5. insulating support; 51. resistor 1; 52. resistor 2; 6. switch. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention will be further described below in conjunction with the embodiments.

[0034] An impedance adjustable test connector, see attached Figure 1-7 , comprising a shell 1, an outer conductor 3 arranged on one side of the shell 1, and a center conductor 4 arranged on the shell 1 and extending into the outer conductor 3, the shell 1 is provided with an internal thread on the side away from the outer conductor 3 to facilitate the installation of the workpiece, the outer conductor 3 is installed on the shell 1 by screws, and an insulating lining is provided between the center conductor 4 and the outer conductor 3, and also includes:

[0035] An insulating support member 5 is arranged in the housing 1, and the insulating support member 5 is detachably connected to the housing 1 by screws, which is convenient for maintenance and replacement. A resistor 1 51 and a resistor 2 52 are arranged on the insulating support member 5, and the resistor 1 51 is electrically connected to the center conductor 1 4. A switch 6 for controlling the access of the resistor 1 51 and the resistor 2 52 is arranged on the housing 1, and the selective access circuit of the resistor 1 51 and the resistor 2 52 is realized by toggling the switch 6. When the switch 6 is toggled to the H position, the resistor 1 51 is short-circuited, the resistor 2 52 is open-circuited, and the resistors do not work, so that the original impedance of the cable under test is maintained, which is convenient for impedance testing of the cable (after the impedance transformation, the impedance of the cable cannot be measured, and the impedance measured is the transformed impedance). When the switch 6 is toggled to the h position, the resistor 1 51 is connected in series, and the resistor 2 52 is connected in parallel, so as to realize an impedance matching network, and convert the components of the cable under test into a standard 50 ohm, which is convenient for testing the attenuation of the cable (the attenuation of the matching network itself needs to be subtracted, which is a fixed value);

[0036] In the above technical solution, the switch 6 is coordinated by the resistor 1 51 and the resistor 2 52 on the insulating support 5. When the resistor 1 51 is short-circuited and the resistor 2 52 is open-circuited, the resistors do not work and the original impedance of the cable under test is maintained, which is convenient for impedance testing of the cable. When the resistor 1 51 is connected in series and the resistor 2 52 is connected in parallel, an impedance matching network is realized, and the components of the cable under test are converted into standard 50 ohms, which is convenient for testing the attenuation of the cable.

[0037] The center conductor 2 is used to fix the workpiece to be tested of different diameters, such as cables. After the workpiece to be tested is inserted into the housing 1, the inner conductor of the workpiece to be tested is fully contacted with the center conductor 2, and then connected in series with the resistor 1 51 and the center conductor 1 4. The center conductor 2 includes a fixed disk 21 arranged on the insulating support 5, and a rotating disk 23 is rotatably installed on the fixed disk 21, and a spring spring 22 is arranged between the fixed disk 21 and the rotating disk 23. After the workpiece is tested and connected to the housing 1 After separation, the clockwork spring 22 can drive the turntable 23 to reset. The turntable 23 is provided with an arc guide groove 232. The fixed plate 21 is provided with a guide plate 24 covering the turntable 23, and the guide plate 24 is provided with a guide straight groove 241. An extrusion piece 243 is elastically installed on the guide plate 24. After the inspection of the workpiece to be inspected is completed and separated from the housing 1, when the clockwork spring 22 is reset, it drives the turntable 23 to rotate in the opposite direction. At this time, the guide straight groove 241 on the guide plate 24 is used to reset the center conductor 22.

[0038] Specifically, a rotating column 231 is provided on the rotating disk 23 , and the rotating column 231 is rotatably mounted on the fixed disk 21 . One end of the clockwork spring 22 is arranged on the rotating column 231 , and the other end is arranged on the inner wall of the housing 1 .

[0039] Furthermore, the arc-shaped guide grooves 232 are provided in multiple groups and distributed in a circular array on the turntable 23 , and one end of the arc-shaped guide grooves 232 is close to the edge of the turntable 23 and the other end is close to the center of the turntable 23 .

[0040] Among them, the number of the guide straight grooves 241 corresponds to the arc-shaped guide grooves 232, and multiple groups of guide straight grooves 241 are distributed in a circular array on the guide plate 24, a fixing sleeve 242 is coaxially installed on the guide plate 24, and the extrusion piece 243 is slidably connected to the fixing sleeve 242, and a spring 2431 is provided between the fixing sleeve 242 and the rotating column 231, and the two ends of the spring 2431 respectively resist the rotating column 231 and the extrusion piece 243.

[0041] In addition, a contact piece is provided on the side of the extrusion piece 243 away from the guide plate 24. The contact piece is funnel-shaped and has friction particles on its surface. The friction particles are used to increase the friction between the workpiece to be detected and the contact piece.

[0042] And a clamping claw 25, the clamping claw 25 includes a clamping plate 251 slidably mounted on the guide plate 24, and the clamping plate 251 is provided with a guide column 252 extending into the arc guide groove 232, a wavy conductive member 253 is slidably mounted on the bottom of the clamping plate 251, and a reset component is provided on the top of the clamping plate 251 for preventing the wavy conductive member 253 from excessive deformation and causing elastic failure.

[0043] Specifically, the clamping claws 25 are provided with multiple groups corresponding to the number of the guide straight grooves 241 , and a fixing piece 257 is slidably mounted on one end of the clamping plate 251 away from the guide pillar 252 , and movable rings 256 are mounted on the multiple groups of the fixing pieces 257 .

[0044] In addition, the wavy conductive member 253 is slidably installed at the bottom of the splint 251, and one end of the wavy conductive member 253 away from the guide column 252 is connected to the fixing member 257, and the reset assembly includes a sealing cylinder 254 and a movable ring 256, the sealing cylinder 254 is arranged on the top of the splint 251, and a piston column 255 is provided on the sealing cylinder 254, and one end of the piston column 255 away from the sealing cylinder 254 is connected to the movable ring 256.

[0045] In the above technical solution, the clamping claws 25 cooperate with the wavy conductive member 253 to fix and clamp the workpieces of different sizes to be detected and maintain electrical connection. When the diameter of the inner conductor of the workpiece to be detected is smaller than the gap between the multiple sets of clamping claws 25, during installation, the workpiece is inserted into the housing 1 and the extrusion member 243 is squeezed, so that the extrusion member 243 is inserted into the rotating column 231. When the workpiece to be detected is subsequently rotated, the turntable 23 rotates and guides the guide column 252 to slide in the arc guide groove 232. At this time, due to the limitation of the guide straight groove 241 on the guide plate 24, the multiple sets of clamping claws 25 move toward the center at the same time, and then cooperate with the wavy conductive member 253 to clamp the inner conductor of the workpiece. When the inner conductor diameter of the workpiece to be inspected is larger than the gap between the multiple groups of clamping claws 25, the workpiece will be squeezed into the gap between the multiple groups of clamping claws 25 under the guidance of the fixing part 257 when entering. At this time, the wavy conductive part 253 will be squeezed and deformed and tend to be horizontal. At this time, the fixing part 257 will be squeezed and pull the piston column 255 away from the sealing cylinder 254. At that time, the inside of the sealing cylinder 254 is in a negative pressure state. When the workpiece is inspected, the piston column 255 will be sucked back into the sealing cylinder 254, thereby driving the fixing part 257 to squeeze the wavy conductive part 253, effectively preventing the excessive deformation of the wavy conductive part 253 from causing elastic failure, and making the clamping process more stable.

[0046] Working principle: When in use, the workpiece to be detected is inserted into the housing 1. When the diameter of the inner conductor of the workpiece to be detected is smaller than the gap between the multiple groups of clamping claws 25, the inner conductor of the workpiece to be detected will squeeze the extrusion piece 243 to make it pass through the fixing sleeve 242 and extend into the rotating column 231. Then, when the workpiece to be detected is rotated, the outer conductor of the workpiece to be detected is threadedly connected with the housing 1 for fixation. At the same time, the turntable 23 rotates and contracts the spring 22. At the same time, the guide column 252 moves in the arc guide groove 232 and cooperates with the guide disk 24, so that the clamping plate 251 moves toward the center of the guide disk 24 along the setting direction of the guide straight groove 241, and then the wavy conductive piece 253 on the clamping claw 25 is used to fix and clamp the inner conductor of the workpiece to be detected and maintain electrical connection; when the diameter of the inner conductor of the workpiece to be detected is larger than the gap between the multiple groups of clamping claws 25, the workpiece will be squeezed into the multiple groups of clamping claws under the guidance of the fixing piece 257 when entering. The wavy conductive member 253 is squeezed between the claws 25, and the wavy conductive member 253 is deformed and tends to be horizontal due to the squeezing. At this time, the fixing member 257 is squeezed and pulls the piston column 255 to make it away from the sealing tube 254. At that time, the inside of the sealing tube 254 is in a negative pressure state. When the workpiece is detected, the piston column 255 is sucked back into the sealing tube 254, thereby driving the fixing member 257 to squeeze the wavy conductive member 253, effectively preventing the excessive deformation of the wavy conductive member 253 from causing elastic failure, making the clamping process more stable. On the other hand, the resistor 1 51 and the resistor 2 52 on the insulating support member 5 are used to cooperate with the switch 6. When the resistor 1 51 is short-circuited and the resistor 2 52 is open-circuited, the resistor does not work, and the original impedance of the cable under test is maintained, which is convenient for impedance testing of the cable. When the resistor 1 51 is connected in series and the resistor 2 52 is connected in parallel, an impedance matching network is realized, and the components of the cable under test are converted into standard 50 ohms, which is convenient for testing the attenuation of the cable.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An impedance adjustable test connector, comprising a housing (1), an outer conductor (3) arranged on one side of the housing (1), and a center conductor (4) arranged on the housing (1) and extending into the outer conductor (3), characterized in that: Also includes: An insulating support member (5) is disposed in the housing (1), a resistor 1 (51) and a resistor 2 (52) are disposed on the insulating support member (5), the resistor 1 (51) and the central conductor 1 (4) are electrically connected, and a switch (6) for controlling the connection of the resistor 1 (51) and the resistor 2 (52) is disposed on the housing (1); A second central conductor (2), the second central conductor (2) comprising a fixed disk (21) arranged on an insulating support member (5), a rotating disk (23) being rotatably mounted on the fixed disk (21), a spring spring (22) being arranged between the fixed disk (21) and the rotating disk (23), an arc-shaped guide groove (232) being arranged on the rotating disk (23), a guide disk (24) covering the rotating disk (23) being arranged on the fixed disk (21), a guide straight groove (241) being arranged on the guide disk (24), and an extrusion member (243) being elastically mounted on the guide disk (24); and a clamping claw (25), the clamping claw (25) comprising a clamping plate (251) slidably mounted on a guide plate (24), the clamping plate (251) being provided with a guide column (252) extending into an arc-shaped guide groove (232), a wavy conductive member (253) being slidably mounted on the bottom of the clamping plate (251), and a reset component for preventing the wavy conductive member (253) from excessively deforming and causing elastic failure being provided on the top of the clamping plate (251).

2. The impedance adjustable test connector according to claim 1, characterized in that: The rotating disk (23) is provided with a rotating column (231), and the rotating column (231) is rotatably mounted on the fixed disk (21); one end of the spring (22) is arranged on the rotating column (231), and the other end is arranged on the inner wall of the housing (1).

3. The impedance adjustable test connector according to claim 1, characterized in that: The arc-shaped guide grooves (232) are provided in multiple groups and distributed in a circular array on the turntable (23), and one end of the arc-shaped guide grooves (232) is close to the edge of the turntable (23) and the other end is close to the center of the turntable (23).

4. The impedance adjustable test connector according to claim 3, characterized in that: The number of the straight guide grooves (241) corresponds to the number of the arc-shaped guide grooves (232), and a plurality of groups of straight guide grooves (241) are distributed in an annular array on the guide plate (24). A fixing sleeve (242) is coaxially mounted on the guide plate (24), and an extrusion piece (243) is slidably connected to the fixing sleeve (242). A spring (2431) is provided between the fixing sleeve (242) and the rotating column (231), and two ends of the spring (2431) respectively abut against the rotating column (231) and the extrusion piece (243).

5. The impedance adjustable test connector according to claim 1, characterized in that: A contact piece is provided on the side of the extrusion piece (243) away from the guide plate (24), the contact piece is funnel-shaped, and friction particles are provided on the surface of the contact piece, and the friction card is used to increase the friction between the workpiece to be detected and the contact piece.

6. The impedance adjustable test connector according to claim 1, characterized in that: The clamping claws (25) are provided with a plurality of groups corresponding to the number of the guide straight grooves (241), and a fixing member (257) is slidably mounted on one end of the clamping plate (251) away from the guide pillar (252), and movable rings (256) are mounted on the plurality of groups of the fixing members (257).

7. The impedance adjustable test connector according to claim 6, characterized in that: The wavy conductive member (253) is slidably mounted on the bottom of the clamping plate (251), and one end of the wavy conductive member (253) away from the guide column (252) is connected to the fixing member (257).

8. The impedance adjustable test connector according to claim 7, characterized in that: The reset assembly comprises a sealing cylinder (254) and a movable ring (256); the sealing cylinder (254) is arranged on the top of the clamping plate (251); a piston column (255) is provided on the sealing cylinder (254); an end of the piston column (255) away from the sealing cylinder (254) is connected to the movable ring (256).

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