Coaxial connector

Abstract

The coaxial connector comprises a socket and a plug which are matched with each other, the socket comprises an alloy seat with at least one accommodating cavity and a terminal assembly inserted in the accommodating cavity, and the alloy seat is provided with a central positioning column along the axial direction. The plug comprises a shell and at least one power connection element arranged in an inner cavity of the shell, a positioning groove is formed in the shell in the axial direction, and the center positioning column can be inserted into the positioning groove in a matched mode. The socket and the plug are respectively provided with a matched positioning structure of the central positioning column and the positioning groove as a first positioning reference, so that the shaking amount of the plug and the socket in two directions orthogonal to the axial direction after the plug and the socket are matched can be reduced; the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector in the vibration impact process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a coaxial connector. Background Art

[0002] Automotive connectors are the signal hubs connecting electronic systems within a car. With the rapid development of new energy vehicles, cars, as mobile devices, often face complex mechanical environments and harsh climatic conditions. Automotive connectors must be able to adapt to environmental requirements such as high and low temperatures, humidity, and vibration, and exhibit superior contact stability under harsh mechanical vibration and shock conditions to maintain stable performance and reliable connections.

[0003] Automotive coaxial connectors consist of a mating plug and a receptacle. During signal transmission, the retention, coaxiality, and wrapping of the mating plugs are crucial factors affecting signal transmission. Existing automotive coaxial connectors typically feature a mating cavity in the plastic shell of the plug and a mating sleeve in the alloy housing of the receptacle. The sleeve is inserted into the mating cavity, serving as the sole reference for mating the plug and receptacle. This mating structure presents the following issues: after mating, the plug and receptacle experience a certain amount of play in two directions orthogonal to the axial direction, impacting the coaxial connector's high-frequency performance stability and reliability during vibration and impact.

[0004] Therefore, in view of the above technical problems, it is necessary to provide an automotive coaxial connector with an improved structure to overcome the above defects. Utility Model Content

[0005] An embodiment of the present application provides a coaxial connector, which effectively reduces the amount of shaking between the plug and the socket in two directions orthogonal to the axial direction after mating, thereby improving the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector during vibration and impact.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A coaxial connector includes a socket and a plug that mate with each other, the socket including an alloy seat having at least one accommodating cavity and a terminal assembly inserted into the accommodating cavity, the alloy seat being provided with a center positioning column along the axial direction, the plug including a shell and at least one electrical connection element arranged in the inner cavity of the shell, the shell being provided with a positioning groove along the axial direction, the center positioning column being capable of being fitted and inserted into the positioning groove.

[0008] Optionally, the terminal assembly includes a pin member and an insulator wrapped around the periphery of the pin member, the pin member includes a pin body and an elastic pin installed on the head of the pin body, the elastic pin includes a plug-in portion and a fixing portion, the middle section of the plug-in portion has a bulge structure, an inner conductor is provided in the power connection element, the inner conductor has a cylindrical plug-in section, the plug-in section has a plug-in cavity, when the socket and the plug are mated and installed, the plug-in portion is inserted into the plug-in cavity of the inner conductor of the plug, and the bulge structure is interference fit with the plug-in cavity.

[0009] Optionally, the elastic pin is formed by winding multiple conductive metal wires in different directions, and the two ends of the needle are welded to form a fat point with a twisted waist drum shape after being fattened.

[0010] Optionally, the electrical connection element is coaxially provided with an inner conductor, an insulating rubber core, and an outer conductor from the inside to the outside, and an elastic spring is sleeved on the front periphery of the outer conductor, and a plurality of protrusions and slots are evenly distributed along the circumference of the elastic spring at both ends.

[0011] Optionally, a shielding sleeve is provided on the inner side of the tail end of the outer conductor, and the front end of the shielding sleeve rests on the insulating rubber core.

[0012] Optionally, a limiting portion is provided in the inner cavity of the shell, and a stop inclined surface is provided on a side of the limiting portion away from the cable.

[0013] Optionally, a plurality of elastic arms are evenly distributed outward along the circumference of the middle portion of the elastic spring, and the elastic arms are clamped at the bottom of the stop inclined surface.

[0014] Optionally, the plug further includes a wire clamp, one end of which clamps the cable therein, and the other end of which is sleeved on the outside of the shielding sleeve.

[0015] Optionally, the socket is further provided with a front shielding block and a rear shielding block, the front shielding block is provided with a first arc-shaped groove and a second arc-shaped groove, the rear shielding block is provided with a third arc-shaped groove matching the second arc-shaped groove, and the bottom inner wall of the alloy seat is provided with a fourth arc-shaped groove matching the first arc-shaped groove, and the radii of the first arc-shaped groove, the second arc-shaped groove, the third arc-shaped groove, and the fourth arc-shaped groove are equal.

[0016] Optionally, the cross-section of the insulator is a symmetrical quadrangular structure.

[0017] The coaxial connector of the present invention can reduce the amount of shaking of the plug and socket in two directions orthogonal to the axial direction after mating by arranging a center positioning column and a positioning groove on the socket and the plug respectively as the first positioning reference, thereby improving the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector during vibration and impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional schematic diagram of a coaxial connector according to an embodiment of the present utility model;

[0019] Figure 2 A bottom view of a coaxial connector according to an embodiment of the present invention;

[0020] Figure 3 A schematic cross-sectional view of a coaxial connector according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the matching of the housing and the alloy seat in the embodiment of the present utility model;

[0022] Figure 5 is a cross-sectional schematic diagram of a plug in an embodiment of the present utility model;

[0023] Figure 6 for Figure 5 An enlarged schematic diagram of region A in FIG;

[0024] Figure 7 This is an exploded schematic diagram of a socket in an embodiment of the present utility model;

[0025] Figure 8 This is an exploded schematic diagram of a plug housing and one of the power connection components in an embodiment of the present utility model;

[0026] Figure 9 Schematic diagram of the structure of the elastic spring in the embodiment of the present utility model;

[0027] Figure 10 This is a schematic structural diagram of a pin member in an embodiment of the present utility model;

[0028] Figure 11 Schematic diagram of the plug-in connection between the pin member and the inner conductor in the embodiment of the present utility model;

[0029] Figure 12 This is a schematic diagram of the plugged connection between the elastic pin and the inner conductor in the embodiment of the present utility model;

[0030] Figure 13 Schematic cross-section of the twist needle at the twist-shaped waist drum-shaped fat point in the embodiment of the present invention;

[0031] Figure 14 1 is a comparison chart of simulation data of the coaxial connector in the embodiment of the utility model and the coaxial connector in the prior art.

[0032] The reference numerals in the drawings of the specification include:

[0033] Coaxial connector 100, plug 2, housing 21, inner cavity 211, positioning groove 212, limiting portion 213, stop slope 214, inner conductor 221, plug section 221A, plug cavity 221B, insulating rubber core 222, outer conductor 223, elastic spring 224, protrusion 225, slot 226, elastic arm 227, shielding sleeve 228, wire clamp 229, socket 3, alloy seat 31, accommodating cavity 311, fourth arc-shaped groove 312, center positioning column 313, base 314, pin 321, insulator 322, pin body 323, riveting Part-323A, blind groove-323B, groove-323C, connecting part-323D, first bending section-323E, second bending section-323F, pin-323G, elastic pin-324, plug-in part-324A, fixing part-324B, bulge structure-324C, front shielding block-33, first arc-shaped groove-331, second arc-shaped groove-332, rear shielding block-34, third arc-shaped groove-341, plastic shell-35, rear mounting plate-36, locking part-37, cable-4, diameter of bulge structure-D1, inner diameter of plug-in cavity-D2, outer diameter of riveted part-L1, outer diameter of plug-in section-L2. DETAILED DESCRIPTION

[0034] The embodiments of the present application provide a coaxial connector to solve the technical problem in the prior art that after the plug and socket are mated, there is a certain amount of shaking in two directions orthogonal to the axial direction, which affects the stability of the high-frequency performance of the coaxial connector and the reliability during vibration and impact.

[0035] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0036] By providing a matching positioning structure of a center positioning column and a positioning groove on the socket and the plug respectively as the first positioning reference, the amount of shaking of the plug and the socket in two directions orthogonal to the axial direction after mating can be reduced, thereby improving the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector during vibration and impact.

[0037] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] It should be noted that any directional indications in this application, such as front, back, left, right, up, down, inside, outside, front end, back end, left end, right end, upper part, lower part, left side, right side, longitudinal, transverse, axial, radial, front side, back side, etc., are all relative concepts.

[0039] like Figures 1 to 13 The figure shows one of the specific embodiments of the present application, in which the connector is a 4-port RF connector. In other embodiments of the connector, the connector may also be other types of connectors, not limited to a 4-port RF connector.

[0040] Reference Figure 1 As shown, the connector 100 includes a socket 3 and a plug 2 that are mated with each other, and the plug 2 is equipped with a cable 4. Specifically, the three mutually orthogonal directions are set as X, Y, and Z directions, and the -Z direction of the mating direction of the plug 2 and the socket 3 is set as the axial direction, the transverse direction perpendicular to the axial direction Z is set as the -Y direction, and the longitudinal direction perpendicular to the axial direction Z is set as the -X direction. Figure 7 As shown, the socket 3 includes an alloy base 31, terminal assemblies, a front shielding block 33, a rear shielding block 34, a plastic shell 35, a rear mounting plate 36, and a locking member 37. The alloy base 31 has a base 314 and four accommodating cavities 311 arranged at the front end of the base 314 along the axial direction Z. The four sets of terminal assemblies are respectively inserted into the accommodating cavities 311. The plastic shell 35 has an opening. The locking member 37 is inserted through the opening of the shell 35 to securely mount the alloy base 31 in the shell 35. The rear mounting plate 36 is mounted and fixed to the rear end of the base 314. The front shielding block 33 is inserted from the bottom of the base 314 to separate the two sets of long terminal assemblies located at the top from the two sets of short terminal assemblies located at the bottom. The rear shielding block 34 is inserted from the bottom of the base 314 between the two sets of long terminal assemblies and the rear mounting plate 36. The long and short terminal assemblies each include a pin 321 and an insulator 322 covering the pin 321.

[0041] Reference Figure 8 As shown, the plug 2 includes a housing 21 and four groups of electrical connection components arranged in four inner cavities 211 of the housing 21. It should be noted that: Figure 8 Only one set of electrical connection elements is shown. An inner conductor 221, an insulating rubber core 222, and an outer conductor 223 are coaxially arranged on the electrical connection elements from the inside to the outside. The core of the cable 4 is electrically connected to the inner conductor 221. A shielding sleeve 228 is sheathed inside the tail end of the outer conductor 223. The front end of the shielding sleeve 228 rests on the insulating rubber core 222, and the rear end is electrically connected to the shielding layer of the cable 4.

[0042] Among them, reference Figure 3 and Figure 4As shown, the alloy seat 31 of the socket 3 is further provided with a center positioning column 313 along the axial direction Z, and the housing 21 of the plug 2 is further provided with a positioning groove 212 along the axial direction Z. The center positioning column 313 can be plugged into the positioning groove 212 .

[0043] The beneficial effects of the present invention are as follows: by setting the matching positioning structure of the central positioning column 313 and the positioning groove 212 as the first positioning reference, the amount of shaking of the plug 2 and the socket 3 in two directions (X direction and Y direction) orthogonal to the axial direction Z after being matched can be reduced, thereby improving the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector during vibration impact.

[0044] In an optional embodiment, the pin assembly 321 is a pin assembly comprising a pin body 323 and a resilient pin 324 fixedly mounted at the pin body head. The resilient pin 324 comprises a plug portion 324A and a fixed portion 324B. The middle section of the plug portion 324A has a bulge structure 324C. The inner conductor 221 is a rigid pin having a cylindrical plug section 221A. The cylindrical shape of the plug section 221A is fixed to an outer diameter. The plug section 221A defines a plug cavity 221B. When the receptacle 3 and the plug 2 are mated, the plug portion 324A is inserted into the plug cavity 221B of the inner conductor 221 of the plug 2. The bulge structure 324C forms an interference fit with the plug cavity 221B. It is understood that the diameter D1 of the bulge structure 324C is greater than the inner diameter D2 of the plug cavity 221B to ensure reliable contact. By providing a resilient pin 324 with a bulge structure 324C in the socket 3, when the plug 2 and the socket 3 are mated, the bulge structure 324C always maintains multiple points of contact in the insertion cavity 221B of the inner conductor 221 of the plug 2. This keeps the high-frequency performance and contact impedance of the coaxial connector stable in harsh environments such as vibration and shock. Furthermore, by setting the outer diameter of the insertion section 221A of the inner conductor 221 in the plug 2 to a fixed, unchanging value, impedance adjustment is more convenient, making it easier to ensure impedance matching and continuity. Figure 14 As shown, curve M corresponds to the simulation data of the coaxial connector in the prior art, and curve N corresponds to the simulation data of the coaxial connector in this embodiment. Figure 14 It can be seen that, compared with the coaxial connector in the prior art, the coaxial connector in this embodiment has better impedance matching and continuity, and reduced signal reflection.

[0045] In an optional embodiment, if Figure 10 and Figure 12 and Figure 13As shown, the elastic pin 324 is formed by winding multiple conductive metal wires in different directions, welding the ends of the needle into shape, and then swelling it to form a twisted needle with a waist-drum-shaped fat point. It should be noted that this waist-drum-shaped fat point has a certain elasticity. When inserted into the rigid plug cavity, the waist-drum shape shrinks, forming multiple points of effective contact with the inner wall of the plug cavity and maintaining a certain pressure to achieve conductivity. When the needle is removed, the waist-drum shape returns to its initial state. Preferably, the elastic pin 324 is twisted together from three inner and nine outer gold-plated copper wires. It is understood that the provision of the nine outer gold-plated copper wires ensures that when in contact, there are at least nine contact points around the contact circle when viewed from the contact end surface.

[0046] In an alternative embodiment, referring again to Figure 10 and Figure 11 As shown, the needle body 323 is bent 90 degrees and includes a rivet portion 323A for securing the elastic pin 324, a connecting portion connected to the rivet portion 323A, and a pin 323G at the end of the connecting portion. The connecting portion includes a first bend section 323E and a second bend section 323F, which are perpendicular to each other. The first bend section 323E is connected to the rivet portion 323A, and the second bend section 323F is connected to the pin 323G. The rivet portion 323A has a blind groove 323B defined along the axial direction Z. The securing portion 324B of the elastic pin 324 is crimped into the blind groove 323B. After crimping, a plurality of evenly distributed grooves 323C are formed around the periphery of the rivet portion 323A. Riveting ensures a more secure connection between the elastic pin 324 and the needle body 323. The outer diameter L1 of the rivet portion 323A matches the outer diameter L2 of the plug section 221A of the inner conductor 221. In this way, the diameter of the inner conductor structure in the coaxial connector can be kept at a fixed value, the impedance of the coaxial connector can be relatively stable, and the transmission efficiency can be improved.

[0047] In an optional embodiment, if Figure 5 and Figure 6 and Figure 9As shown, an elastic spring 224 is sleeved around the front periphery of the outer conductor 223. Multiple protrusions 225 and slots 226 are evenly distributed along the circumference of the elastic spring 224 at both ends. The protrusions 225 interfere with the inner wall of the inner cavity 211 to ensure assembly stability. The slots 226 are used to lock the elastic spring 224 to the outer conductor 223. Multiple spring arms 227 are evenly distributed along the circumference of the elastic spring 224, facing outward. A stopper 213 is provided in the inner cavity 211 of the housing 21. A stopper slope 214 is provided on the side of the stopper 213 facing away from the cable 4. During the installation of the electrical connection component into the inner cavity 211 of the housing, the spring arms 227 are compressed and deformed to allow the connection component to pass smoothly. Once the connection component is in place, the spring arms 227 rebound and engage the bottom of the stopper slope 214, forming a stop engagement, preventing the connection component from exiting the housing 21. It should be noted that providing the stop bevel 214 can also effectively reduce the play clearance of the coaxial connector in the axial direction Z, reduce the difference in high-frequency transmission characteristic impedance, and ensure the stability of high-frequency transmission performance.

[0048] In an alternative embodiment, referring again to Figure 5 As shown, the plug 2 further includes a wire clamp 229, one end of which holds the cable 4 therein, and the other end of which is sleeved on the outside of the shielding sleeve 228. This improves the stability of the connection between the cable 4 and the plug 2 and also facilitates installation during the production process.

[0049] In an optional embodiment, if Figure 2 As shown, the front shielding block 33 is provided with a first arcuate groove 331 and a second arcuate groove 332, the rear shielding block 34 is provided with a third arcuate groove 341 that matches the second arcuate groove 332, and the bottom inner wall of the alloy seat 31 is provided with a fourth arcuate groove 312 that matches the first arcuate groove 331. The radii of the first arcuate groove 331, the second arcuate groove 332, the third arcuate groove 341, and the fourth arcuate groove 312 are equal. It can be understood that this can keep the diameter of the outer conductor structure in the receptacle 3 at a relatively fixed value, making the impedance of the coaxial connector relatively stable and improving transmission efficiency. Preferably, the cross-section of the insulator 322 is a symmetrical quadrangular structure. In this way, the quadrangular structure can interfere with the arcuate grooves, making the connection between the two more stable.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A coaxial connector comprising a socket and a plug mating with each other, characterized in that: The socket includes an alloy seat with at least one accommodating cavity and a terminal assembly inserted in the accommodating cavity. A central positioning column is provided on the alloy seat along the axial direction. The plug includes a shell and at least one power connection element arranged in the inner cavity of the shell. A positioning groove is provided on the shell along the axial direction. The central positioning column can be fitted and inserted in the positioning groove.

2. The coaxial connector according to claim 1, wherein: The terminal assembly includes a pin member and an insulator wrapped around the periphery of the pin member, the pin member includes a pin body and an elastic pin installed on the head of the pin body, the elastic pin includes a plug-in portion and a fixing portion, the middle section of the plug-in portion has a bulge structure, an inner conductor is provided in the power connection element, the inner conductor has a cylindrical plug-in section, and the plug-in section has a plug-in cavity. When the socket and the plug are mated and installed, the plug-in portion is inserted into the plug-in cavity of the inner conductor of the plug, and the bulge structure is interference fit with the plug-in cavity.

3. The coaxial connector according to claim 2, wherein: The elastic plug pin is formed by winding a plurality of conductive metal wires in different directions, and the two ends of the needle are welded to form a fat point having a twisted waist drum shape after being fattened.

4. The coaxial connector according to claim 3, wherein: The power connection element is coaxially arranged with an inner conductor, an insulating rubber core and an outer conductor from inside to outside. The front periphery of the outer conductor is covered with an elastic spring. Both ends of the elastic spring are evenly arranged with multiple protrusions and slots along the circumference.

5. The coaxial connector according to claim 4, wherein: A shielding sleeve is sleeved on the inner side of the tail end of the outer conductor, and the front end of the shielding sleeve is against the insulating rubber core.

6. The coaxial connector according to claim 5, wherein: A limiting portion is provided in the inner cavity of the shell, and a stop inclined surface is provided on a side of the limiting portion away from the cable.

7. The coaxial connector according to claim 6, wherein: A plurality of elastic arms are evenly distributed outwardly along the circumference of the middle portion of the elastic spring sheet, and the elastic arms are clamped at the bottom of the stop inclined surface.

8. The coaxial connector according to claim 7, wherein: The plug further comprises a wire clamp, one end of which clamps the cable therein, and the other end of which is sleeved on the outside of the shielding sleeve.

9. The coaxial connector according to claim 8, wherein: The socket is also provided with a front shielding block and a rear shielding block, the front shielding block is provided with a first arc-shaped groove and a second arc-shaped groove, the rear shielding block is provided with a third arc-shaped groove matching the second arc-shaped groove, and the bottom inner wall of the alloy seat is provided with a fourth arc-shaped groove matching the first arc-shaped groove, and the radii of the first arc-shaped groove, the second arc-shaped groove, the third arc-shaped groove, and the fourth arc-shaped groove are equal.

10. The coaxial connector according to claim 9, wherein: The cross section of the insulator is a symmetrical quadrangular structure.

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