Coaxial connector and socket thereof

Abstract

The utility model discloses a coaxial connector and a socket thereof, which comprises an alloy seat with at least one accommodating cavity and a terminal assembly inserted in the accommodating cavity, and is characterized in that the terminal assembly comprises a pin assembly and an insulator coated on the periphery of the pin assembly; the contact pin assembly comprises a pin body and an elastic contact pin installed at the head of the pin body, the elastic contact pin comprises a plugging part and a fixing part, the middle section of the plugging part is provided with a bulge structure, and when the socket and the plug are installed in a matched mode, the plugging part is plugged into a plugging cavity of a rigid plug-in of the plug of the coaxial connector, and the fixing part is fixed to the plugging cavity of the rigid plug-in of the plug of the coaxial connector. And the bulge structure is in interference fit with the insertion cavity. According to the coaxial connector, the elastic contact pin with the bulge structure is arranged in the socket, so that when the plug and the socket are plugged oppositely, the bulge structure always keeps a plurality of effective contact points in the plugging cavity of the rigid plug-in of the plug, and the high-frequency performance and the contact impedance of the coaxial connector can be kept stable in relatively severe environments such as vibration impact.

Description

Technical Field

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

[0002] Automotive connectors are the signal hubs connecting the electronic systems in vehicles. With the rapid development of new energy vehicles, as mobile devices, vehicles often face complex mechanical environments and harsh climatic conditions. Automotive connectors are required to adapt to environmental requirements such as high temperature, low temperature, humidity, vibration, etc., and have better contact stability under severe mechanical vibration and shock conditions to maintain stable performance and reliable connection.

[0003] For existing automotive coaxial connectors, generally, the inner conductors are mostly completed by stamping or turning processes, and the elastic contact between the plug and the socket is realized through the cantilever beam on the inner conductor. This contact method has the following problems: 1. There are few contact points of the inner conductor between the socket and the plug, and the anti-vibration and mechanical shock performance is not good. There is a risk of instantaneous signal disconnection under intense impact conditions, affecting signal transmission and even posing potential safety hazards.

[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. Summary of the Utility Model

[0005] The embodiment of the present application provides a coaxial connector and its socket, which can keep the high-frequency performance and contact impedance of the coaxial connector stable in relatively harsh environments such as vibration and shock.

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

[0007] A socket of a coaxial connector, which can be mated with the plug of the coaxial connector, includes: an alloy seat having at least one receiving cavity and a terminal assembly inserted into the receiving cavity. The terminal assembly includes a pin assembly and an insulator coated around the pin assembly. The pin assembly includes a pin body and an elastic pin installed at the head of the pin body. The elastic pin includes a plugging portion and a fixing portion. The middle section of the plugging portion has a bulging structure. In the state where the socket and the plug are mated and installed, the plugging portion is inserted into the plugging cavity of the rigid plug of the coaxial connector's plug, and the bulging structure is in interference fit with the plugging cavity.

[0008] Optionally, the elastic pin is formed by winding multiple conductive metal wires in different directions, welded at both ends of the needle head, and has a twist-shaped waist drum-shaped thickened point after upsetting.

[0009] Optionally, the elastic pin is made by stranding several inner and several outer gold-plated copper wires.

[0010] Optionally, the needle body includes a riveting part for fixing the elastic pin, a connecting part connected to the riveting part, and pins located at the end of the connecting part.

[0011] Optionally, the needle body is bent at 90 degrees. The connecting part includes a first bending section and a second bending section that are perpendicular to each other. The first bending section is connected to the riveting part, and the second bending section is connected to the pins.

[0012] Optionally, a blind groove is axially formed in the riveting part. The fixing part of the elastic pin is crimped in the blind groove, and a plurality of uniformly distributed grooves are formed on the periphery of the riveting part after crimping.

[0013] Optionally, the outer diameter of the riveting part is the same as the outer diameter of the insertion section of the rigid plug-in part.

[0014] Optionally, a central positioning post is axially provided on the alloy seat.

[0015] A coaxial connector includes a plug and the above socket that cooperate with each other. The plug includes a housing and at least one power connection element arranged in the inner cavity of the housing. A rigid plug-in part is arranged in the power connection element. The rigid plug-in part has a cylindrical insertion section, and the insertion section has an insertion cavity. The diameter of the bulging structure on the elastic pin is larger than the inner diameter of the insertion cavity.

[0016] Optionally, a positioning groove is axially provided on the housing, and the central positioning post can be inserted into the positioning groove in a matching manner.

[0017] For the coaxial connector and its socket of the present utility model, by arranging an elastic pin with a bulging structure in the socket, when the plug and the socket are inserted into each other, multiple effective contact points are always maintained in the insertion cavity of the rigid plug-in part of the plug by the bulging structure. In a relatively harsh environment such as vibration and impact, the high-frequency performance and contact impedance of the coaxial connector can be kept stable. Description of the Drawings

[0018] Figure 1 is a perspective schematic diagram of the coaxial connector according to the embodiment of the present utility model;

[0019] Figure 2 is a bottom view of the coaxial connector according to the embodiment of the present utility model;

[0020] Figure 3 is a cross-sectional schematic diagram of the coaxial connector according to the embodiment of the present utility model;

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

[0022] Figure 5Schematic cross-sectional view of the plug in the embodiment of the present utility model;

[0023] Figure 6 is Figure 5 enlarged schematic view of area A in;

[0024] Figure 7 Exploded schematic view of the socket in the embodiment of the present utility model;

[0025] Figure 8 Exploded schematic view of the plug housing and one of the power connection elements in the embodiment of the present utility model;

[0026] Figure 9 Schematic structural view of the elastic reed in the embodiment of the present utility model;

[0027] Figure 10 Schematic structural view of the pin assembly in the embodiment of the present utility model;

[0028] Figure 11 Schematic view of the insertion state of the pin assembly and the rigid plug-in in the embodiment of the present utility model;

[0029] Figure 12 Schematic view of the insertion state of the elastic pin and the rigid plug-in in the embodiment of the present utility model;

[0030] Figure 13 Schematic cross-sectional view of the twist pin at the twist-shaped waist drum-shaped fat point in the embodiment of the present utility model;

[0031] Figure 14 Simulation data comparison chart of the coaxial connector in the embodiment of the present utility model and the coaxial connector in the prior art.

[0032] Reference numerals in the drawings of the specification include:

[0033] Coaxial connector - 100, plug - 2, housing - 21, inner cavity - 211, positioning groove - 212, limiting part - 213, stop inclined plane - 214, rigid plug - 221, insertion section - 221A, insertion cavity - 221B, insulating rubber core - 222, outer conductor - 223, elastic reed - 224, bump - 225, card slot - 226, elastic arm - 227, shielding sleeve - 228, wire clamp - 229, socket - 3, alloy seat - 31, receiving cavity - 311, fourth arc groove - 312, center positioning post - 313, base - 314, pin assembly - 321, insulator - 322, pin body - 323, riveting part - 323A, blind slot - 323B, groove - 323C, connecting part - 323D, first bending section - 323E, second bending section - 323F, pin - 323G, elastic pin - 324, insertion part - 324A, fixing part - 324B, bulging structure - 324C, front shielding block - 33, first arc groove - 331, second arc groove - 332, rear shielding block - 34, third arc groove - 341, plastic shell - 35, rear mounting plate - 36, locking part - 37, cable - 4, diameter of the bulging structure - D1, inner diameter of the insertion cavity - D2, outer diameter of the riveting part - L1, outer diameter of the insertion section - L2. Detailed implementation manners

[0034] In an embodiment of the present application, by providing a coaxial connector and its socket, the technical problems of few contact points between inner conductors and poor anti - vibration and mechanical shock performance in the prior art are solved.

[0035] The technical solutions in the embodiments of the present application for solving the above - mentioned technical problems are generally as follows:

[0036] By arranging elastic pins with a bulging structure in the socket, when the plug and the socket are inserted into each other, the bulging structure always has multiple effective contact points in the insertion cavity of the rigid plug of the plug. In a relatively harsh environment such as vibration and impact, the high - frequency performance and contact impedance of the coaxial connector can be kept stable.

[0037] To make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific implementation manners of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementations disclosed below.

[0038] It should be noted that in this application, if there are directional indications, 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 direction, transverse direction, axial direction, radial direction, front side, back side, etc., they are all relative concepts.

[0039] As Figures 1 to 13 shown, this is one specific embodiment of the present application. In this embodiment, the connector is a 4-port RF connector. In other embodiments of the connector, the connector can also be other types of connectors, not limited to the 4-port RF connector.

[0040] Referring to Figure 1 shown, the connector 100 includes a mating socket 3 and a plug 2. A cable 4 is assembled on the plug 2. Specifically, referring to Figure 7 and Figure 10 shown, the socket 3 includes an alloy seat 31, a terminal assembly, a front shielding block 33, a rear shielding block 34, a plastic shell 35, a rear mounting plate 36, and a locking member 37.

[0041] The alloy seat 31 has a base 314 and 4 receiving cavities 311 axially provided at the front end of the base 314. Four groups of terminal assemblies are respectively inserted into the receiving cavities 311. An opening is provided on the plastic shell 35, and the locking member 37 is inserted through the opening of the shell 35 to fixedly install the alloy seat 31 in the shell 35. The rear mounting plate 36 is fixedly installed at the rear end of the base 314. The front shielding block 33 is inserted from the bottom of the base 314 to separate the 2 groups of long terminal assemblies located in the upper part and the 2 groups of short terminal assemblies located in the lower part. The rear shielding block 34 is inserted from the bottom of the base 314 between the 2 groups of long terminal assemblies and the rear mounting plate 36.

[0042] The long and short terminal assemblies respectively include a pin assembly 321 and an insulator 322 wrapped around the pin assembly 321. The pin assembly 321 includes a pin body 323 and an elastic pin 324 fixedly installed at the head of the pin body. The elastic pin 324 includes a plugging portion 324A and a fixing portion 324B. The middle section of the plugging portion 324A has a bulging structure 324C.

[0043] Referring to Figure 8 and Figure 11 and Figure 12 shown, the plug 2 includes a housing 21 and 4 groups of power connection elements provided in 4 inner cavities 211 of the housing 21. It should be noted that, Figure 8Only one set of power connection components is shown therein. A rigid plug 221, an insulating rubber core 222, and an outer conductor 223 are coaxially arranged on the power connection component from the inside to the outside. The core wire of the cable 4 is electrically connected to the rigid plug 221. A shielding sleeve 228 is sleeved on the inner side of the tail end of the outer conductor 223. The front end of the shielding sleeve 228 abuts against the insulating rubber core 222, and the rear end is electrically connected to the shielding layer of the cable 4. Specifically, the rigid plug 221 has a cylindrical plugging section 221A. The plugging section 221A is set to be cylindrical so that the outer diameter of the plugging section 221A is a fixed value. The plugging section 221A has a plugging cavity 221B. In the state where the socket 3 and the plug 2 are paired and installed, the plugging part 324A is inserted into the plugging cavity 221B of the rigid plug 221 of the plug 2, and the bulging structure 324C is in interference fit with the plugging cavity 221B. It can be understood that the diameter D1 of the bulging structure 324C is greater than the inner diameter D2 of the plugging cavity 221B to achieve reliable contact.

[0044] The beneficial effects of the present utility model are as follows: By providing the elastic pin 324 with the bulging structure 324C in the socket 3, when the plug 2 and the socket 3 are inserted into each other, the bulging structure 324C always maintains multi-point effective contact in the plugging cavity 221B of the rigid plug 221 of the plug 2, and in a relatively harsh environment such as vibration and impact, the high-frequency performance and contact impedance of the coaxial connector are kept stable. At the same time, by setting the outer diameter of the plugging section 221A of the rigid plug 221 in the plug 2 to a fixed and unchanged value, it is more convenient to adjust the impedance, and the impedance matching and continuity are more easily guaranteed. Refer to Figure 14 As shown, the curve M corresponds to the simulation data of the coaxial connector in the prior art, and the curve N corresponds to the simulation data of the coaxial connector in this embodiment. From Figure 14 it can be seen that compared with the coaxial connector in the prior art, for the coaxial connector in this embodiment, the impedance matching and continuity of the coaxial connector in this embodiment are improved, and the signal reflection is reduced.

[0045] In an optional embodiment, such as Figure 1 and Figure 3 and Figure 4As shown in the figure, the following three mutually orthogonal directions are set as the X, Y, and Z directions. The mating direction of the plug 2 and the socket 3, the -Z direction, is set as the axial direction. The transverse direction that intersects and is perpendicular to the axial direction Z is the -Y direction, and the longitudinal direction that intersects and is perpendicular to the axial direction Z is the -X direction. A positioning groove 212 is provided along the axial direction Z on the outer shell 21 of the plug 2, and a central positioning post 313 is provided along the axial direction Z on the alloy seat 31 of the socket 3. The central positioning post 313 can be fitted and inserted into the positioning groove 212. By setting the mating and positioning structure of the central positioning post 313 and the positioning groove 212 as the first positioning reference, the wobbling amount of the plug 2 and the socket 3 after mating in the two directions (X direction and Y direction) orthogonal to the axial direction Z can be reduced, improving the stability of the high-frequency performance of the coaxial connector and the reliability of the coaxial connector during vibration and shock processes.

[0046] In an alternative embodiment, as Figure 10 and Figure 12 and Figure 13 shown, the elastic pin 324 is formed by winding multiple conductive metal wires in different directions, with both ends of the needle tip welded and then bulged to form a twist needle with a twist-shaped waist-shaped bulge. It should be noted that the twist-shaped waist-shaped bulge has a certain elasticity. When inserted into the rigid insertion cavity, the waist shape shrinks, forming multiple effective contacts with the inner wall of the insertion cavity and maintaining a certain pressure to form conduction. When the needle tip is pulled out, the waist shape returns to its initial state. Preferably, the elastic pin 324 is made of 3 inner and 9 outer gold-plated copper wires twisted together. It can be understood that when setting the 9 outer gold-plated copper wires, at least 9 contact points exist on the contact circumference when viewed from the contact end face.

[0047] In an alternative embodiment, referring again to Figure 10 and Figure 11 shown, the needle body 323 is bent at 90 degrees. The needle body 323 includes a riveting part 323A for fixing the elastic pin 324, a connecting part connected to the riveting part 323A, and a pin 323G at the end of the connecting part. The connecting part includes a first bending section 323E and a second bending section 323F that are perpendicular to each other. The first bending section 323E is connected to the riveting part 323A, and the second bending section 323F is connected to the pin 323G. The riveting part 323A is provided with a blind groove 323B along the axial direction Z, and the fixing part 324B of the elastic pin 324 is crimped in the blind groove 323B. After crimping, a plurality of uniformly distributed grooves 323C are formed on the periphery of the riveting part 323A. By means of riveting, the elastic pin 324 can be more firmly connected to the needle body 323 on the premise of ensuring the conductivity of the elastic pin 324. The outer diameter L1 of the riveting part 323A is the same as the outer diameter L2 of the insertion section 221A of the rigid plug-in part 221. In this way, the diameter of the inner conductor structure in the coaxial connector can be a fixed value, making the impedance of the coaxial connector relatively stable and improving the transmission efficiency.

[0048] In an alternative embodiment, as Figure 5 and Figure 6 and Figure 9 shown, an elastic reed 224 is also sleeved on the front periphery of the outer conductor 223. A plurality of bumps 225 and card slots 226 are respectively and evenly arranged along the circumferential direction at both ends of the elastic reed 224. The bumps 225 are interference-fixed with the inner wall of the inner cavity 211, which can ensure the stability of the assembly. The card slots 226 are used to lock the elastic reed 224 on the outer conductor 223. A plurality of elastic arms 227 are also evenly arranged outward along the circumferential direction in the middle of the elastic reed 224. A limiting portion 213 is provided in the inner cavity 211 of the housing 21. A stop inclined surface 214 is provided on the side of the limiting portion 213 away from the cable 4. During the process of inserting the power connection element into the inner cavity 211 of the housing, the elastic arms 227 are deformed under pressure so that the power connection element can pass through smoothly. After the power connection element is installed in place, the elastic arms 227 rebound and are clamped at the bottom of the stop inclined surface 214 to achieve a stop fit, so as to prevent the power connection element from exiting the housing 21. It should be noted that the provision of the stop inclined surface 214 can also effectively reduce the crosstalk clearance of the coaxial connector in the axial direction Z, reduce the difference in high-frequency transmission characteristic impedance, and ensure the stability of the high-frequency transmission performance.

[0049] In an alternative embodiment, referring again to Figure 5 shown, the plug 2 further includes a wire clip 229. One end of the wire clip 229 clamps the cable 4 therein, and the other end is sleeved outside the shielding sleeve 228. In this way, the connection stability between the cable 4 and the plug 2 can be improved, and at the same time, the installation operation during the production process is facilitated.

[0050] In an alternative embodiment, as Figure 2 shown, a first arc-shaped groove 331 and a second arc-shaped groove 332 are provided on the front shielding block 33, a third arc-shaped groove 341 matching the second arc-shaped groove 332 is provided on the rear shielding block 34, and a fourth arc-shaped groove 312 matching the first arc-shaped groove 331 is provided on the inner side wall of the bottom of the alloy seat 31. The radii of the first arc-shaped groove 331, the second arc-shaped groove 332, the third arc-shaped groove 341, and the fourth arc-shaped groove 312 are equal. It can be understood that in this way, the diameter of the outer conductor structure in the socket 3 can be a relatively fixed value, the impedance of the coaxial connector is relatively stable, and the transmission efficiency is improved. Preferably, the cross-section of the insulator 322 is in a symmetric quadrangular prism structure. In this way, the quadrangular prism structure can interfere with the arc-shaped groove, making the connection between the two more stable.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0052] The embodiments described above only represent the implementation modes of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A coaxial connector socket, which can be matched with a coaxial connector plug, characterized in that: include: An alloy seat having at least one accommodating cavity and a terminal assembly inserted in the accommodating cavity, wherein the terminal assembly includes a pin assembly and an insulator covering the periphery of the pin assembly, wherein the pin assembly includes a needle body and an elastic pin installed on the head of the needle body, wherein the elastic pin includes a plug-in portion and a fixing portion, wherein the middle section of the plug-in portion has a bulging structure, wherein the plug-in portion is inserted into the plug-in cavity of the rigid plug-in unit of the plug of the coaxial connector when the socket and the plug are mated and installed. The bulging structure has an interference fit with the plug-in cavity.

2. The coaxial connector socket according to claim 1, characterized in that: The elastic plug pin is formed by winding a plurality of conductive metal wires in different directions, and the two ends of the needle head are welded to form a fat point in the shape of a twisted waist drum after being fattened.

3. The socket of the coaxial connector according to claim 2, characterized in that: The elastic pin is formed by twisting a plurality of inner and outer gold-plated copper wires.

4. The socket of the coaxial connector according to claim 3, characterized in that: The needle body comprises a riveting portion for fixing the elastic pin, a connecting portion connected to the riveting portion, and a pin located at the end of the connecting portion.

5. The socket of the coaxial connector according to claim 4, characterized in that: The needle body is bent at 90 degrees, and the connecting portion includes a first bending section and a second bending section that are perpendicular to each other, the first bending section is connected to the riveting portion, and the second bending section is connected to the plug pin.

6. The socket of the coaxial connector according to claim 5, characterized in that: The riveting part is provided with a blind groove along the axial direction, and the fixing part of the elastic pin is crimped in the blind groove, and a plurality of evenly distributed grooves are formed on the periphery of the riveting part after crimping.

7. The socket of the coaxial connector according to claim 6, characterized in that: The outer diameter of the riveting portion is consistent with the outer diameter of the plug-in section of the rigid plug-in unit.

8. The coaxial connector socket according to claim 7, characterized in that: A central positioning column is axially arranged on the alloy seat.

9. A coaxial connector, characterized in that: A plug and a socket as claimed in any one of claims 1 to 8, wherein the plug comprises a shell and at least one power connection element arranged in an inner cavity of the shell, wherein a rigid plug-in is arranged in the power connection element, wherein the rigid plug-in has a cylindrical plug-in section, wherein the plug-in section has a plug-in cavity, and wherein the diameter of the bulge structure on the elastic pin is greater than the inner diameter of the plug-in cavity.

10. The coaxial connector according to claim 9, characterized in that: The housing is provided with a positioning groove along the axial direction, and the central positioning column can be inserted in the positioning groove.

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