Coaxial contact and radio frequency connector

Abstract

The invention relates to a coaxial contact piece and a radio frequency connector, the coaxial contact piece comprises an outer conductor, an inner conductor and an insulation support arranged between the outer conductor and the inner conductor, the outer conductor and the inner conductor are coaxially arranged, the outer conductor is of an integrated structure formed by rolling a sheet, and a positioning elastic piece bent outwards is arranged at the tail of the outer conductor. The positioning elastic piece comprises an anti-retreating elastic piece and a stopping elastic piece. The radio frequency connector comprises a connector shell and an insulating base, and the insulating base is provided with the coaxial contact piece. By optimizing the outer conductor structure in the coaxial contact, the structure of the coaxial contact is simplified, and the reliability of radio frequency signal transmission is improved.

Description

Technical Field

[0001] The present invention belongs to the field of radio frequency connectors, and particularly relates to a coaxial contact and a radio frequency connector. Background Art

[0002] With the rapid development of modern industries, medical treatment, rail transit, communication and other fields, the corresponding equipment is increasingly showing technical characteristics such as miniaturized structure, diversified functions, and precision modules. Therefore, researching equipment miniaturization, reliability technology, and broadening the functional field has positive theoretical significance and guiding value.

[0003] Radio frequency connectors are important supporting electrical components, and coaxial contacts are key components of radio frequency connectors. Their reliability level plays a decisive role in the operation of the entire system. The reliability of the contacts depends on various factors such as design, process, and environment. Therefore, analyzing the structure of the contacts is of great significance for improving the reliability of the contacts.

[0004] Wire spring hole type electrical connectors are often adopted by system equipment because of their small contact resistance and good electrical performance. The existing high-life coaxial contacts have wire spring hole structures both inside and outside. The basic components of high-frequency contacts include an inner conductor, an outer conductor surrounding the inner conductor, and an insulating support for transmitting high-frequency signals (air can also be used as an insulating medium).

[0005] Figure 1 Shown is a coaxial contact with an existing wire spring hole structure. The jack has a first outer conductor, a first inner conductor, and an insulator disposed between the first outer conductor and the first inner conductor; the pin has a second outer conductor, a second inner conductor, and an insulator disposed between the second outer conductor and the second inner conductor. Wire spring wires are respectively disposed inside the first outer conductor and the first inner conductor of the jack to form a wire spring hole structure. When the pin and the jack are inserted into each other, the second inner conductor contacts the wire spring hole of the first inner conductor, and the second outer conductor contacts the wire spring hole of the first outer conductor. The wire spring wires of the wire spring hole provide a reliable radial contact force for the pin, ensuring continuous and reliable contact between the pin and the jack.

[0006] The above structure of the coaxial contact has the following disadvantages: 1. The miniaturization degree of the wire spring hole is limited. Especially, the outer sides of the first outer conductor and the second outer conductor still need to be positioned on the connector through a crown positioning spring, forming a radial multi-layer structure with a large radial dimension, which is not conducive to the miniaturization and integration of the contact.

[0007] 2. A diameter-changing structure needs to be provided inside the first outer conductor and the first inner conductor of the jack, which affects the reliability of radio frequency signal transmission.

[0008] 3. The overall number of parts is large, the structure is complex, the processing efficiency is low, the process is complicated, and the cost is high. Summary of the Invention

[0009] The object of the present invention is to provide a coaxial contact and a radio frequency connector, which simplify the structure and improve the reliability of radio frequency signal transmission by optimizing the outer conductor structure of the coaxial contact.

[0010] To achieve the above object, the technical solution adopted by the present invention is: a coaxial contact for a radio frequency connector, comprising an outer conductor, an inner conductor coaxially arranged, and an insulating support arranged between the outer conductor and the inner conductor. The outer conductor is an integral structure formed by rolling a sheet material, and a positioning elastic piece bent outward is arranged at the tail of the outer conductor. The positioning elastic piece includes an anti-withdrawal elastic piece and a stop elastic piece.

[0011] The beneficial effects are as follows: The outer conductor is formed by rolling, with a simple processing technology and an integral structure, eliminating the need for a knurled positioning structure; The rolled outer conductor simplifies the diameter-changing structure in the axial direction, with fewer diameter changes, which is beneficial to improving the reliability of radio frequency signal transmission; The outer conductor is positioned in cooperation with the insulating base on the radio frequency connector through the integrally formed positioning elastic piece, so that a crown spring is not required for positioning in the radial direction, reducing the stacking layers in the radial direction, which is beneficial to the realization of structure miniaturization and module precision.

[0012] The reduction of the radial layers and the rolled outer conductor can reduce the wall thickness of the outer conductor, reduce the heat accumulation in current transmission, and improve the reliability.

[0013] Further, at least one anti-withdrawal elastic piece and at least one stop elastic piece are respectively provided.

[0014] The beneficial effects are as follows: The anti-withdrawal elastic piece can prevent the contact from retreating during mating, and the stop elastic piece can position the installation depth during the installation of the contact.

[0015] Further, the anti-withdrawal elastic piece is inclined backward relative to the insertion direction, and the stop elastic piece is perpendicular to the insertion direction.

[0016] The beneficial effects are as follows: The set directions of the anti-withdrawal elastic piece and the stop elastic piece can effectively play their respective roles.

[0017] Further, a fixing structure is arranged on the inner wall of the outer conductor, in front of and behind the insulating support, for axially positioning the insulating support.

[0018] The beneficial effects are as follows: The fixing structure and the outer conductor are of an integral structure, which can reduce the number of components.

[0019] Furthermore, the fixing structure is a positioning protrusion or an elastic positioning piece.

[0020] The beneficial effects are as follows: It is convenient for customers to select the required form of the fixing structure according to the actual situation.

[0021] As an implementation manner, the coaxial contact is a jack contact, the outer conductor and the inner conductor are respectively a jack outer conductor and a jack inner conductor, a wire spring hole for the outer conductor is provided at the front end of the jack outer conductor, and a wire spring hole for the inner conductor is provided at the front end of the jack inner conductor.

[0022] Its beneficial effect is that the coaxial contact is specifically applied to the jack contact, and the use of wire spring holes can ensure the reliability of electrical connection and reduce the surface friction coefficient and contact resistance.

[0023] As a further option, a front sleeve is fixed at the front end of the jack outer conductor. The front sleeve has the same inner diameter as the jack outer conductor. A contact area is formed at the connection position between the front sleeve and the jack outer conductor. An inner sleeve for installing wire spring filaments is arranged in the contact area to form the wire spring hole for the outer conductor.

[0024] Its beneficial effect is that a structural form of the wire spring hole for the outer conductor is given, and the split structure of the front sleeve and the jack outer conductor is convenient for the installation of wire spring filaments.

[0025] Further, convex ribs are arranged on the outer peripheral surface of the inner sleeve, and the convex ribs are in interference fit or concave-convex fit with the inner wall of the contact area.

[0026] Its beneficial effect is that the arrangement of the convex ribs can ensure the reliability and stability of the installation of the inner sleeve.

[0027] As another option, the front end of the jack outer conductor serves as the contact area, and an inner sleeve for installing wire spring filaments is arranged in the contact area to form the wire spring hole for the outer conductor.

[0028] Its beneficial effect is that a second structural form of the wire spring hole for the outer conductor is given. This structure does not require the setting of a front sleeve, and the front end of the jack outer conductor replaces the front sleeve in place, which can further reduce the number of components.

[0029] Further, convex ribs are arranged on the outer peripheral surface of the inner sleeve, and the convex ribs are in interference fit or concave-convex fit with the inner wall of the contact area.

[0030] Its beneficial effect is that the arrangement of the convex ribs can ensure the reliability and stability of the installation of the inner sleeve.

[0031] As another option, a housing is fixed at the front end of the jack outer conductor. One end of the housing far from the jack outer conductor bends inward to form a bent portion. An insulator capable of transmitting high-frequency signals is arranged in the housing. The insulator is provided with a through hole for the jack inner conductor to pass through; a plurality of wire spring filaments are arranged in the housing to form the wire spring hole for the outer conductor. One end of the wire spring filament is fixed on the insulator, and the other end extends towards the bent portion.

[0032] The beneficial effects are as follows: A third structural form of the outer conductor wire spring hole is provided. In this structure, there is no need to set an inner sleeve to fix the wire spring, but one end of the wire spring is fixed by an insulator capable of transmitting high-frequency signals, and the setting of the bent part of the housing can prevent the other end of the wire spring from being exposed.

[0033] As an implementation manner, the coaxial contact is a pin contact, and the outer conductor and the inner conductor are a pin outer conductor and a pin inner conductor respectively.

[0034] The beneficial effects are as follows: The coaxial contact is specifically applied to the pin contact.

[0035] The present invention also provides a radio frequency connector, including a connector housing and an insulating base. The insulating base is provided with a mounting hole, and the mounting hole is a through hole for mounting a contact, and the contact is the coaxial contact described in any one of the above.

[0036] Furthermore, the rear end face of the insulating base is a rear positioning face, a removal groove is provided at the front section of the mounting hole, the removal groove opens at the front end face of the insulating base, and the bottom of the removal groove is a front positioning face; after the coaxial contact is inserted into the mounting hole, the stop spring piece abuts against the rear positioning face to limit the insertion depth of the coaxial contact, and the anti-retreat spring piece abuts against the front positioning face to prevent the coaxial contact from retreating during the mating process.

[0037] The beneficial effects are as follows: The coaxial contact can be effectively axially positioned in both directions by the stop spring piece and the anti-retreat spring piece, and the setting of the removal groove facilitates using a removal tool to remove the coaxial contact from the connector.

[0038] The beneficial effects of the present invention are as follows: The outer conductor of the present invention adopts a rolled and formed integral structure, which can avoid multiple diameter changes in the existing structure and provide a more uniform transmission channel for radio frequency transmission. The setting of the positioning spring piece can, on the one hand, play a fixing role for the coaxial contact in the axial direction without using a coronal spring for positioning, greatly simplifying the overall structure of the coaxial contact. On the other hand, it can also use a removal tool to retract the anti-retreat spring piece to facilitate the removal of the coaxial contact. In addition, the positioning spring piece can also cooperate with the insulating base to prevent the coaxial contact from rotating. Description of the Drawings

[0039] Figure 1 It is a schematic diagram when the coaxial contacts of the radio frequency connector in the prior art are mated; Figure 2 It is a schematic diagram when the two coaxial contacts in Embodiment 1 of the present invention are mated; Figure 3 It is a schematic diagram of another structural form of the fixing structure on the jack outer conductor in Embodiment 1 of the present invention; Figure 4Schematic diagram when two coaxial contacts are inserted into each other in Embodiment 2 of the present invention; Figure 5 Schematic diagram when two coaxial contacts are inserted into each other in Embodiment 3 of the present invention; Figure 6 Schematic diagram of the structure of a radio frequency connector in Embodiment 4 of the present invention; Markings in the figure: 100, pin; 200, jack; 300, first inner conductor; 400, first outer conductor; 500, insulator; 600, second inner conductor; 700, second outer conductor; 1, jack contact; 2, pin contact; 3, positioning spring piece, 301, anti-withdrawal spring piece, 302, stop spring piece; 4, outer conductor of jack; 5, inner conductor of jack; 6, insulating support; 7, wire spring; 8, front sleeve; 9, inner conductor of pin; 10, outer conductor of pin; 11, positioning protrusion; 12, inner sleeve, 1201, rib; 13, elastic positioning piece; 14, housing, 1401, bent portion; 15, spot riveting point; 16, insulator; 17, removal groove; 18, connector housing; 19, insulating base. Detailed implementation manners

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but it shall not be used as a basis for any limitation to the invention.

[0041] Embodiment 1 A coaxial contact, which is used for a radio frequency connector and belongs to a high-frequency contact. It includes an outer conductor, an inner conductor arranged coaxially, and an insulating support arranged between the outer conductor and the inner conductor. The outer conductor is an integral structure formed by rolling a sheet material, and a positioning spring piece bent outward is arranged at the tail of the outer conductor. The positioning spring piece includes an anti-withdrawal spring piece and a stop spring piece. The anti-withdrawal spring piece is inclined backward relative to the insertion direction, and the stop spring piece is arranged perpendicular to the insertion direction.

[0042] Specifically, when the coaxial contact is a jack contact, its structure can be referred to in the appendix Figure 2-3As shown, the jack contact 1 includes a jack outer conductor 4, a jack inner conductor 5, and an insulating support 6 arranged between the jack outer conductor 4 and the jack inner conductor 5. The insulating support 6 and the jack outer conductor 4 and the jack inner conductor 5 are interference fit to ensure the reliability of the structure. The jack outer conductor 4 is a cylindrical integrated structure made of sheet material, and the jack inner conductor 5 is arranged inside the jack outer conductor 4, and the two are coaxially arranged. The side of the jack outer conductor 4 is provided with a positioning protrusion 11 protruding inward, and the positioning protrusion 11 extends along the circumference to form a ring, which is used to position the insulating support 6, and the positioning protrusion 11 forms an annular groove on the outside of the jack outer conductor 4. The front end of the jack outer conductor 4 is fixedly connected with a front sleeve 8 by a spot riveting process, and the outer diameter of the front sleeve 8 is equal to the outer diameter of the jack outer conductor 4. The front sleeve 8 and the front end of the plug-in outer conductor 4 form an outer conductor plug-in area, and the outer conductor plug-in area is provided with an inner sleeve 12, and a plurality of wire spring wires 7 are installed on the inner sleeve 12 to form an outer conductor wire spring hole. The outer diameter surface of the inner sleeve 12 is provided with one or two annular convex ribs 1201, or a plurality of circumferentially distributed protrusions. In this embodiment, two annular convex ribs 1201 are provided. The inner sleeve 12 is fixed to the inner wall of the front sleeve 8 and the inner wall of the plug-in outer conductor 4 by the convex ribs 1201 in the form of interference fit. In other embodiments, a groove can also be provided on the inner wall of the front sleeve 8 or the inner wall of the plug-in outer conductor 4, and the convex rib 1201 forms a convex-concave fit with the groove to achieve the fixation of the inner sleeve 12.

[0043] Furthermore, another positioning protrusion 11 is provided on the side wall of the outer conductor 4 of the jack for positioning the end of the inner sleeve 12 .

[0044] When installing the outer conductor wire spring hole of the jack outer conductor 4, the wire spring wire 7 is installed on the inner sleeve 12, and then the inner sleeve 12 is installed in the front sleeve 8, and finally the front sleeve 8 and the front end of the jack outer conductor 4 are connected and fixed by spot riveting.

[0045] An inner conductor wire spring hole is provided in the contact hole at the front end of the inner conductor 5 of the jack, and the formation method is the same as that of the outer conductor wire spring hole. The required wire spring wire 7 is installed on an inner sleeve, and then the inner sleeve is installed on the corresponding front sleeve. Finally, the front sleeve is fixedly connected to the front end of the inner conductor of the jack by spot riveting.

[0046] The outer side surface of the rear part of the jack outer conductor 4 is provided with a positioning spring piece 3 that is tilted outward. Preferably, in this embodiment, the positioning spring pieces 3 are symmetrically arranged on both sides of the jack outer conductor 4. When the jack contact 1 is installed on the insulating base of the RF connector, the positioning is achieved by the positioning spring piece 3. The positioning spring piece 3 is formed by punching and bending on the sheet material of the rolled jack outer conductor 4, and thus is an integral structure with the jack outer conductor 4. Figure 1Two types of positioning spring pieces 3 are arranged on the outer conductor 4 of the socket along its axial direction. The positioning spring piece 3 close to the front end of the socket contact assembly 1 is an anti-retraction spring piece that mainly plays an anti-retraction role, and the relatively rear positioning spring piece 3 is a stop spring piece that mainly limits the insertion depth of the socket contact 1.

[0047] In other embodiments, one positioning spring piece 3 may be provided for each type, which can also play the role of preventing retreat or limiting the insertion depth. Alternatively, two or more positioning spring pieces 3 may be provided for each type at intervals along the circumferential direction. The specific implementation may be selected according to the actual situation.

[0048] When the coaxial contact is a pin contact, its structure can refer to the attached Figure 2-3 As shown, the pin contact 2 includes a pin outer conductor 10, a pin inner conductor 9, and an insulating support 6 disposed between the pin outer conductor 10 and the pin inner conductor 9. The insulating support 6 is interference-fitted with the pin outer conductor 10 and the pin inner conductor 9 to ensure the reliability of the structure. The pin outer conductor 10 is a cylindrical integrated structure made of rolled sheet material. The pin inner conductor 9 is disposed inside the pin outer conductor 10, and the two are coaxially arranged. A positioning protrusion 11 protruding inward is disposed on the side of the pin outer conductor 10. The positioning protrusion 11 extends along the circumference to form a ring, which is used to position the insulating support 6. The positioning protrusion 11 forms an annular groove on the outside of the pin outer conductor 10.

[0049] The outer side surface of the rear part of the pin outer conductor 10 is provided with a positioning spring piece 3 that is tilted outward, and has the same arrangement mode and function as the positioning spring piece 3 on the socket outer conductor 4.

[0050] When the socket contact 1 and the pin contact 2 are plugged in, the front end of the pin outer conductor 10 contacts the outer conductor wire spring hole at the front end of the socket outer conductor 4, and the front end of the pin inner conductor 9 contacts the inner conductor wire spring hole at the front end of the socket inner conductor 5, thereby ensuring a reliable electrical connection and reducing the surface friction coefficient and contact resistance during plugging in.

[0051] In other embodiments, the positioning protrusions 11 on the jack outer conductor 4 and the pin outer conductor 10 may also adopt other forms of fixing structures to achieve the positioning of the insulating support 6. For example, Figure 3 In the embodiment, taking the socket contact 1 as an example, an inwardly-curved elastic positioning piece 13 is provided on the side of the socket outer conductor 4, and the elastic positioning piece 13 is provided at the front and rear ends of the insulating support 6, abutting against the front and rear end surfaces of the insulating support 6, so as to realize axial positioning of the insulating support 6.

[0052] On the jack outer conductor 4 and the pin outer conductor 10, the positioning springs 3 are located at the rear of the outer conductors, that is, behind the insulating support 6 inside the outer conductors, and do not affect the insulating support 6 in correcting the front end shape and tolerance of the jack outer conductor 4 or the pin outer conductor 10.

[0053] Example 2 The difference between this embodiment and Embodiment 1 is that: in this embodiment, the front end of the jack outer conductor 4 extends forward to replace the front sleeve 8 of Embodiment 1, and its structure is as Figure 4 shown.

[0054] Example 3 The difference between this embodiment and Embodiment 1 is that: in this embodiment, a housing 14 is used to replace the front sleeve 8 of Embodiment 1, and the inner sleeve 12 in Embodiment 1 is cancelled. Its structure is as Figure 5 shown. The housing 14 is of a circular tube structure, and its outer diameter and inner diameter are equal to the outer diameter and inner diameter of the jack outer conductor 4 respectively. One end of the housing 14 is a docking end for fixedly connecting with the front end of the jack outer conductor 4 by dot riveting, and the connection position is Figure 5 the dot riveting point 15 in. The other end of the housing 14 bends inwards to form a bent portion 1401. An insulator 16 is further provided inside the docking end of the housing 14. The insulator 16 has a through hole for the jack inner conductor 5 to pass through, and the inner wall of the through hole is in fitting contact with the outer peripheral surface of the jack inner conductor 5. The outer peripheral surface of the insulator 16 is in interference fit with the inner wall of the housing 14. A plurality of wire spring filaments 7 are also arranged circumferentially inside the housing 14 to form the outer conductor wire spring hole. One end of the wire spring filament 7 is fixed on the insulator 16, and the other end extends towards the bent portion 1401. The setting of the bent portion 1401 can prevent the wire spring filaments 7 from being exposed.

[0055] From Figure 5 it can also be seen that the positioning spring pieces 3 on the jack contact 1 and the pin contact 2 have two structural forms and different functions respectively. Among them, the positioning spring piece 3 close to the front end of the jack contact 1 or the pin contact 2 is an anti-withdrawal spring piece 301 inclined relative to the plugging direction, and the relatively rearward positioning spring piece 3 is a stop spring piece 302 perpendicular to the plugging direction. The anti-withdrawal spring piece 301 can abut against the insulating base of the connector and prevent the jack contact 1 or the pin contact 2 from retreating during the plugging process. When the jack contact 1 or the pin contact 2 is inserted into the connector, the stop spring piece 302 positions the insertion depth by cooperating with the stop surface on the connector.

[0056] The insulating supports 6 and the insulators 16 in Embodiments 1-3 of the present invention can both transmit high-frequency signals.

[0057] Example 4 A radio frequency connector includes a connector housing 18 and an insulating base 19 inside the connector housing 18. The jack contact 1 or the pin contact 2 described in any one of Embodiments 1-3 is installed inside the insulating base 19. The following combines Figure 6, taking the installation of the jack contact 1 as an example, the rear end face of the insulating base 19 is the rear positioning surface 1901. The inner wall of the installation hole of the insulating base 19 is adapted to the outer diameter of the outer conductor 4 of the jack of the jack contact 1, so as to realize the fitting contact between the outer peripheral surface of the outer conductor 4 of the jack and the inner wall of the installation hole, ensuring the installation stability of the jack contact 1. A removal groove 17 capable of accommodating the anti-withdrawal elastic piece 301 is further provided at the front section of the installation hole. The inner diameter of the removal groove 17 is larger than the outer diameter of the outer conductor 4 of the jack. The bottom of the removal groove 17 in the axial direction forms a front positioning surface 1902. The removal groove 17 opens at the front end face of the insulating base 19, that is, the mating end of the connector.

[0058] The distance between the rear end face of the anti-withdrawal elastic piece 301 and the stop elastic piece 302 is equal to the distance between the front positioning surface 1902 and the rear positioning surface 1901.

[0059] The installation process of the jack contact 1 is as follows: The jack contact 1 is inserted into the installation hole of the insulating base 19 from the rear end of the connector housing 18 forward. Since the anti-withdrawal elastic piece 301 is inclined backward, the anti-withdrawal elastic piece 301 will be squeezed by the inner wall of the installation hole and contract and deform inward. When the anti-withdrawal elastic piece 301 enters the removal groove 17, the squeezing force it receives disappears, and the anti-withdrawal elastic piece 301 resets and can abut against the front positioning surface 1902. At this time, the stop elastic piece 302 abuts against the rear positioning surface 1901 to prevent the jack contact 1 from being further inserted forward, thereby limiting the installation depth of the jack contact 1.

[0060] During the mating process of the connector, the anti-withdrawal elastic piece 301 can abut tightly against the front positioning surface 1902 to prevent the jack contact 1 from retreating, and on the circumferential direction, both sides of the anti-withdrawal elastic piece 301 are stuck on both sides of the removal groove 17, which can play a role in preventing the jack contact 1 from rotating.

[0061] Furthermore, a positioning groove for accommodating the stop elastic piece 302 is also provided on the rear positioning surface 1901. The stop elastic piece 302 being stuck in the positioning groove can also play a role in preventing the jack contact 1 from rotating.

[0062] When it is necessary to remove the jack contact 1 from the connector housing 18, a removal tool can be inserted ( Figure 6 as shown by the arrow from left to right in) into the removal groove 17 to press the anti-withdrawal elastic piece 301, so that the anti-withdrawal elastic piece 301 contracts and deforms inward, disengages from the front positioning surface 1902, and then the jack contact 1 is pushed out of the insulating base 19 from front to back.

[0063] When installing the pin contact 2 of the RF connector, the installation process and removal process of the pin contact 2 in the connector housing 18 are the same as those of the jack contact 1.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Those of ordinary skill in the art should understand that the specific implementation manners of the present invention can be modified or equivalently replaced by referring to the above embodiments. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention is within the scope of protection of the claims pending for approval.

Claims

1. A coaxial contact for a radio frequency connector, comprising an outer conductor, an inner conductor arranged coaxially, and an insulating support (6) arranged between the outer conductor and the inner conductor, characterized in that: The outer conductor is an integral structure formed by rolling a sheet, and a positioning elastic piece (3) bent outward is arranged at the tail of the outer conductor. The positioning elastic piece (3) includes an anti-withdrawal elastic piece (301) and a stop elastic piece (302).

2. The coaxial contact according to claim 1, characterized in that: At least one anti-withdrawal elastic piece (301) and at least one stop elastic piece (302) are respectively arranged.

3. The coaxial contact according to claim 1, characterized in that: The anti-withdrawal elastic piece (301) is arranged obliquely backward relative to the insertion direction, and the stop elastic piece (302) is arranged perpendicular to the insertion direction.

4. The coaxial contact according to claim 1, characterized in that: A fixing structure is arranged on the inner wall of the outer conductor, in front of and behind the insulating support (6), for axially positioning the insulating support (6).

5. The coaxial contact according to claim 4, characterized in that: The fixing structure is a positioning protrusion (11) or an elastic positioning piece (13).

6. The coaxial contact according to any one of claims 1-5, characterized in that: The coaxial contact is a jack contact (1), the outer conductor and the inner conductor are respectively a jack outer conductor (4) and a jack inner conductor (5), and an outer conductor wire spring hole is arranged at the front end of the jack outer conductor (4), and an inner conductor wire spring hole is arranged at the front end of the jack inner conductor (5).

7. The coaxial contact according to claim 6, characterized in that: A front sleeve (8) is fixed at the front end of the jack outer conductor (4). The front sleeve (8) has the same inner diameter as the jack outer conductor (4). A contact area is formed at the connection position of the front sleeve (8) and the jack outer conductor (4). An inner sleeve (12) for installing wire spring filaments (7) is arranged in the contact area to form the outer conductor wire spring hole.

8. The coaxial contact according to claim 7, wherein: Convex ribs (1201) are arranged on the outer peripheral surface of the inner sleeve (12), and are in interference fit or convex-concave fit with the inner wall of the contact area through the convex ribs (1201).

9. The coaxial contact according to claim 6, wherein: The front end of the jack outer conductor (4) serves as a contact area, and an inner sleeve (12) for installing wire spring filaments (7) is arranged in the contact area to form the outer conductor wire spring hole.

10. The coaxial contact according to claim 9, characterized in that: Convex ribs (1201) are arranged on the outer peripheral surface of the inner sleeve (12), and are in interference fit or convex-concave fit with the inner wall of the contact area through the convex ribs (1201).

11. The coaxial contact according to claim 6, characterized in that: A housing (14) is fixed at the front end of the jack outer conductor (4). One end of the housing (14) far from the jack outer conductor (4) is bent inward to form a bent portion (1401). An insulator (16) capable of transmitting high-frequency signals is arranged in the housing (14). The insulator (16) is provided with a through hole for the jack inner conductor (5) to pass through; a plurality of wire spring filaments (7) are arranged in the housing (14) to form the outer conductor wire spring hole. One end of the wire spring filaments (7) is fixed on the insulator (16), and the other end extends toward the bent portion (1401).

12. The coaxial contact according to any one of claims 1-5, characterized in that: The coaxial contact is a pin contact (2), and the outer conductor and the inner conductor are respectively a pin outer conductor (10) and a pin inner conductor (9).

13. A radio frequency connector, comprising a connector housing (18) and an insulating base (19), wherein the insulating base (19) is provided with mounting holes which are through holes for mounting contact members, and is characterized in that: The contact is the coaxial contact according to any one of claims 1-12.

14. The RF connector according to claim 13, wherein: The rear end face of the insulating base (19) is a rear positioning face (1901). A removal groove (17) is provided at the front section of the mounting hole. The removal groove (17) opens to the front end face of the insulating base (19), and the bottom of the removal groove (17) is a front positioning face (1902). After the coaxial contact is inserted into the mounting hole, the stop spring piece (302) abuts against the rear positioning face (1901) to limit the insertion depth of the coaxial contact, and the anti-retreat spring piece (301) abuts against the front positioning face (1902) to prevent the coaxial contact from retreating during the mating process.

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