Push-in type subminiature high-reliability radio frequency coaxial connector

Abstract

The utility model relates to a radio-frequency coaxial connector, in particular to a push-in type subminiature high-reliability radio-frequency coaxial connector, and aims to solve the problems that when an existing SWMP connector is plugged, a socket and a plug are easy to damage, and the diameter size of the head of an inner conductor of the plug is small, so that the strength is poor, the service life is short, and some high-vibration and high-reliability radio-frequency coaxial connector cannot be realized. And the device can be fully used in airborne and satellite-borne project environments, such as frequent insertion. The socket comprises a plug and a socket, the socket comprises a socket shell, a socket insulating medium and a socket inner conductor, and the socket insulating medium is a glass medium; the socket inner conductor is cylindrical, and the diameter of the socket inner conductor is 0.28-0.32 mm; a stepped hole is formed in the socket shell along the axial direction, the small-diameter section of the stepped hole is a mounting hole, the large-diameter section of the stepped hole is a connecting hole, a stepped surface is formed at the joint of the mounting hole and the connecting hole, the diameter of the connecting hole is 1.85-2mm, and the diameter of the mounting hole is 1.63-1.67 mm; the socket shell, the socket insulating medium and the socket inner conductor are fixedly connected in a sintering mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to a radio frequency coaxial connector, specifically relates to a push-in type ultra-small high reliability radio frequency coaxial connector. BACKGROUND

[0002] Radio frequency coaxial connectors are widely used in aviation, aerospace, national defense, communication and other industries. With the development of the industry, the required signal propagation speed is faster and faster, and the frequency is higher and higher. At the same time, with the rapid development of small-sized and high-integrated electronic products, the demand for small-sized and high-reliability radio frequency coaxial connectors has become increasingly urgent.

[0003] At present, the commonly used blind plug connector has various models such as SMP, SSMP, SWMP and SMPM. Among them, the SWMP ultra-small push-in type radio frequency coaxial connector is a blind matching high-performance commonly used radio frequency connector with an insulating support interface, which is convenient to blind match and easy to integrate, stable in performance, small in size, light in weight, wide in working frequency band, excellent in mechanical and electrical performance, fast in connection and the like.

[0004] However, the inner conductor head diameter of the socket SWMP-J is only 0.23mm, the inner conductor head diameter size is small, which leads to poor strength. At the same time, affected by the structure size, the shell of the plug SWMP-K is a reed contact head, the wall thickness is thin, which leads to short service life and affects the transmission of connector electrical signal and vibration resistance. Although the inner conductor head diameter of the SSMP type product socket is 0.3mm, the reliability is higher than that of SWMP, but the internal size of the shell of the SSMP type product socket is 2.21mm, which is too large in size and cannot be used in some small-sized and high-integrated occasions. INVENTION CONTENTS

[0005] The utility model discloses a push-in type ultra-small high reliability radio frequency coaxial connector, which solves the technical problems of the existing SWMP connector, such as easy damage of the socket and the plug during insertion, small inner conductor head diameter of the plug, poor strength, short service life and inability to be fully used in some airborne and spaceborne project environments with high vibration and frequent insertion.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0007] A push-in type ultra-small high reliability radio frequency coaxial connector, comprising a plug and a socket, the socket comprising a socket shell, a socket insulating medium and a socket inner conductor which are coaxially sleeved from outside to inside, characterized in that:

[0008] The socket insulating medium is a glass medium;

[0009] The socket inner conductor is in a cylindrical shape with a diameter of 0.28-0.32mm.

[0010] The stepped hole is arranged in the socket shell along the axial direction, the small-diameter section of the stepped hole is the mounting hole, the large-diameter section of the stepped hole is the connecting hole, the connecting part of the mounting hole and the connecting hole forms a stepped surface, the diameter of the connecting hole is 1.85-2mm, and the diameter of the mounting hole is 1.63-1.67mm;

[0011] The socket insulating medium is located in the mounting hole, and the socket inner conductor passes through the socket insulating medium, with the inner end extending into the connecting hole and the outer end extending out of the socket shell;

[0012] The socket shell, the socket insulating medium and the socket inner conductor are fixedly connected in a sintering mode.

[0013] Further, the diameter of the socket inner conductor is 0.3mm.

[0014] Further, the diameter of the mounting hole is 1.65mm.

[0015] Further, the inner end of the socket inner conductor is in a semispherical shape.

[0016] Further, the plug is symmetrically arranged at two ends and comprises a plug shell, a plug insulating medium and a plug inner conductor coaxially sleeved in sequence from outside to inside;

[0017] The end of the plug shell is provided with a plurality of first grooves, each of which penetrates the inner and outer circumferential surfaces of the plug shell along the radial direction, and the end surface of the plug shell is used for abutting against the stepped surface during plugging;

[0018] The end of the plug inner conductor is provided with a plug hole, the inner end of the socket inner conductor is used for plugging into the plug hole during plugging, and the end of the plug inner conductor is provided with a plurality of second grooves, each of which penetrates the outer and inner circumferential surfaces of the plug inner conductor along the radial direction;

[0019] The inner circumferential surface of the plug shell is provided with a first annular groove, and the outer circumferential surface of the plug insulating medium is embedded in the first annular groove;

[0020] The outer circumferential surface of the plug inner conductor is provided with a second annular groove, and the inner circumferential surface of the plug insulating medium is embedded in the second annular groove.

[0021] Further, the end of the plug shell is divided into a plurality of petal portions by the plurality of first grooves, and the outer circumferential surface of each petal portion is provided with a protrusion.

[0022] Further, the inner circumferential wall of the connecting hole is provided with an annular boss along the middle section in the axial direction, and the protrusion is clamped between the annular boss and the stepped surface.

[0023] Further, the plurality of first grooves are arranged at equal intervals around the axis of the plug shell, and the plurality of second grooves are arranged at equal intervals around the axis of the plug inner conductor.

[0024] The first grooves are six or four, and the second grooves are two.

[0025] The utility model discloses compared with prior art's beneficial effect is:

[0026] 1. The push-in type ultra-small high-reliability radio frequency coaxial connector adopts glass medium as the socket insulating medium, and since the dielectric constant of the glass medium is higher than that of the commonly used polytetrafluoroethylene medium, under the requirement of meeting 50Ω characteristic impedance, and in addition to the step surface as the electrical reference surface, the electrical performance of the connector can be ensured to be better, so that the diameter of the mounting hole of the socket shell can be as small as 1.65mm, the diameter of the connecting hole can be as small as 1.85-2mm, and the diameter of the inner conductor of the socket can be as large as 0.3mm, so that the socket volume of the coaxial connector is reduced to 70% of the socket volume of the SSMP type connector, and the coaxial connector is more suitable for use in miniaturization, high integration and high reliability occasions.

[0027] 2. Compared with the inner conductor head diameter size 0.23mm of the socket of the SWMP type connector, the diameter size of the inner conductor of the socket of the push-in type ultra-small high-reliability radio frequency coaxial connector is increased to 0.3mm, the strength is increased, the service life of the connector is prolonged, the reliability and durability when the socket and the plug are plugged are improved, and the requirement of frequent plugging of the plug and the socket is better met.

[0028] 3. In the push-in type ultra-small high-reliability radio frequency coaxial connector, the end of the plug shell is uniformly provided with four or six first grooves, so that the socket and the plug are in elastic contact, and then the push-in type ultra-small high-reliability radio frequency coaxial connector has better electrical performance and contact reliability in the environment of high vibration and frequent plugging, and the service life is improved.

[0029] 4. The push-in type ultra-small high-reliability radio frequency coaxial connector is provided with a plug hole at the end of the inner conductor of the plug, and two second grooves are uniformly arranged at the end of the inner conductor of the plug, so that the inner conductor of the plug and the inner conductor of the socket can be reliably plugged. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a sectional view structural schematic diagram of the push-in type ultra-small high-reliability radio frequency coaxial connector embodiment of the utility model;

[0031] Figure 2 It is an enlarged view of B in Figure 1

[0032] Figure 3 It is a sectional view structural schematic diagram of the socket in the push-in type ultra-small high-reliability radio frequency coaxial connector embodiment of the utility model; ​

[0033] Figure 4 It is another embodiment sectional view structure diagram of the socket of the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model;

[0034] Figure 5 It is the front view structure diagram of the plug of the embodiment of the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model;

[0035] Figure 6 It is the left view structure diagram of the plug of the embodiment of the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model;

[0036] Figure 7 It is the sectional view structure diagram of the plug of the embodiment of the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model.

[0037] The figure mark is explained as follows:

[0038] 1-socket shell, 11-mounting hole, 12-connection hole, 13-annular boss, 14-step surface, 2-socket insulating medium, 3-socket inner conductor, 4-plug shell, 41-first recess, 42-petal part, 421-protrusion, 43-first annular recess, 5-plug insulating medium, 6-plug inner conductor, 61-plug hole, 62-second recess, 63-second annular recess. DETAILED DESCRIPTION

[0039] In order to make the purpose, advantage and feature of the utility model more clear, the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model is further detailed below with the combination of the drawings and specific embodiment.

[0040] In the description of the utility model, it is necessary to explain that the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance.

[0041] Referring to Figure 1 The push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model includes plug and socket, the socket includes socket shell 1, socket insulating medium 2 and socket inner conductor 3 that are coaxially and successively sleeved from outside to inside, and the plug includes plug shell 4, plug insulating medium 5 and plug inner conductor 6 that are coaxially and successively sleeved from outside to inside.

[0042] As Figure 2 , Figure 3As shown, the stepped hole is arranged in the socket shell 1 along the axial direction, the small-diameter section of the stepped hole is the mounting hole 11, the diameter of the mounting hole 11 is 1.65 mm, the socket insulating medium 2 is located in the mounting hole 11, the large-diameter section of the stepped hole is the connecting hole 12, the diameter of the connecting hole 12 is 1.85-2 mm, the connecting part of the mounting hole 11 and the connecting hole 12 forms the stepped surface 14, the end surface of the plug shell 4 is used for abutting against the stepped surface 14 during plugging, the stepped surface 14 is both a mechanical reference surface and an electrical reference surface, and the electrical performance of the connector can be ensured to be more excellent; the socket inner conductor 3 is in a cylindrical shape, the diameter of the socket inner conductor 3 is 0.3 mm, the inner end of the socket inner conductor 3 is in a hemispherical shape, the socket inner conductor 3 passes through the socket insulating medium 2, the inner end of the socket inner conductor 3 extends into the connecting hole 12, and the outer end of the socket inner conductor 3 extends out of the socket shell 1; in order to meet the sealing requirement of the product, the strength requirement of the holding force of the socket inner conductor 3 and the like, the socket insulating medium 2 is a glass medium, and the socket shell 1, the socket insulating medium 2 and the socket inner conductor 3 are fixedly connected in a sintering mode.

[0043] In other embodiments, the diameter of the mounting hole 11 can also be set as 1.63 mm, 1.64 mm, 1.66 mm, 1.67 mm and the like, and the diameter of the socket inner conductor 3 can also be set as 0.28 mm, 0.29 mm, 0.31 mm, 0.32 mm and the like.

[0044] The push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model adopts glass medium as socket insulating medium 2, because the dielectric constant of glass medium is higher than that of the commonly used polytetrafluoroethylene medium, under the requirement of meeting 50Ω characteristic impedance, plus the stepped surface 14 as an electrical reference surface, the diameter of the mounting hole 11 of the socket shell 1 can be as small as 1.65 mm, the diameter of the connecting hole 12 can be as small as 1.85-2 mm, and the diameter of the socket inner conductor 3 can be as large as 0.3 mm, compared with the inner conductor head diameter size 0.23 mm of the socket of the SWMP type connector, the diameter size of the socket inner conductor 3 is increased, the strength is increased, the service life of the connector is prolonged, the reliability and durability during plugging of the socket and the plug are improved, the frequent plugging requirement of the plug and the socket is better met, compared with the SSMP type connector, the volume of the socket of the coaxial connector is reduced to 70% of the volume of the socket of the SSMP type connector, and the coaxial connector is more suitable for small, high integration and high reliability occasions, so that the push-in type ultra-small high-reliability radio frequency coaxial connector of the utility model guarantees the product reliability under a smaller volume.

[0045] As Figure 1 , Figure 5 , Figure 6 and Figure 7As shown, the plug is symmetrically arranged at two ends, in use, the socket can be used as an adapter, the end of the plug housing 4 is provided with four first grooves 41, the four first grooves 41 are uniformly arranged around the axis of the plug housing 4, each first groove 41 penetrates the inner and outer circumferential surfaces of the plug housing 4 along the radial direction, the end of the plug housing 4 is divided into four petal portions 42 by the four first grooves 41, the arrangement of the plurality of first grooves 41 makes the end of the plug have good elasticity, facilitating the insertion of the socket and the plug, so that the push-in type ultra-small high-reliability radio frequency coaxial connector has better electrical performance and contact reliability in the environment of high vibration and frequent plugging, and the service life is improved; the end of the plug inner conductor 6 is provided with a socket 61, the inner end of the socket inner conductor 3 is used to be inserted into the socket 61 during plugging, the end of the plug inner conductor 6 is provided with two second grooves 62, the two second grooves 62 are uniformly arranged around the axis of the plug inner conductor 6, each second groove 62 penetrates the outer and inner circumferential surfaces of the plug inner conductor 6 along the radial direction, and the arrangement of the plurality of second grooves 62 can realize soft and reliable plugging of the plug inner conductor 6 and the socket inner conductor 3; a first annular groove 43 is arranged on the inner circumference of the plug housing 4, the first annular groove 43 is located at the middle of the plug housing 4 in the axial direction, the outer circumference of the plug insulating medium 5 is embedded in the first annular groove 43, and a second annular groove 63 is arranged on the outer circumference of the plug inner conductor 6, the second annular groove 63 is located at the middle of the plug inner conductor 6 in the axial direction, and the inner circumference of the plug insulating medium 5 is embedded in the second annular groove 63.

[0046] In other embodiments, the number of first grooves 41 can also be two, three, five, six, etc., and the number of second grooves 62 can also be three, four, etc.

[0047] As Figure 1 , Figure 3 , Figure 5 As shown, when the plug and the socket are plugged, the end of the plug housing 4 is plugged into the connecting hole 12 of the socket housing 1, in order to improve the plugging force, realize the half-pawl and full-pawl pawl mode, the inner circumferential wall of the connecting hole 12 is provided with an annular boss 13 at the middle segment in the axial direction, the outer circumference of each petal portion 42 is provided with a protrusion 421, and the protrusion 421 is clamped between the annular boss 13 and the step surface 14, so that the plugging force can be improved, and the anti-vibration performance is also good. In other embodiments, as Figure 4 shown, the inner circumferential wall of the connecting hole 12 can also not be provided with the annular boss 13.

[0048] The push-in type ultra-small high-reliability radio frequency coaxial connector has the advantages of axial floating, simple structure, small size, suitable for interconnection between modules, reliable connection, stable performance, and can be used for modular multi-way plugging or multi-way dense arrangement connection between boards, and is suitable for various environments such as aviation, aerospace, ground and shipborne.

[0049] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the specific technical solutions recorded in the foregoing examples, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A push-in type ultra-small high-reliability radio frequency coaxial connector, comprising a plug and a socket, the socket comprising a socket shell (1), a socket insulating medium (2) and a socket inner conductor (3) coaxially sleeved in turn from outside to inside, characterized in that: the socket insulating medium (2) is a glass medium; the socket inner conductor (3) is in a cylindrical shape with a diameter of 0.28-0.32 mm; the socket shell (1) is provided with a stepped hole in the axial direction, the small-diameter section of the stepped hole is a mounting hole (11), the large-diameter section of the stepped hole is a connecting hole (12), the connecting part of the mounting hole (11) and the connecting hole (12) forms a stepped surface (14), the diameter of the connecting hole (12) is 1.85-2 mm, and the diameter of the mounting hole (11) is 1.63-1.67 mm; the socket insulating medium (2) is located in the mounting hole (11), the socket inner conductor (3) passes through the socket insulating medium (2), the inner end of the socket inner conductor (3) extends into the connecting hole (12), and the outer end of the socket inner conductor (3) extends out of the socket shell (1); the socket shell (1), the socket insulating medium (2) and the socket inner conductor (3) are fixedly connected by sintering.

2. The push-in type ultra-small high-reliability radio frequency coaxial connector according to claim 1, characterized in that: the diameter of the socket inner conductor (3) is 0.3 mm.

3. The push-in type ultra-small high-reliability radio frequency coaxial connector according to claim 2, characterized in that: the diameter of the mounting hole (11) is 1.65 mm.

4. The push-in type ultra-small high-reliability radio frequency coaxial connector according to claim 2, characterized in that: the inner end of the socket inner conductor (3) is in a hemispherical shape.

5. The push-in type ultra-small high-reliability radio frequency coaxial connector according to any one of claims 1-4, characterized in that: the plug is symmetrically arranged at both ends and comprises a plug shell (4), a plug insulating medium (5) and a plug inner conductor (6) coaxially sleeved in turn from outside to inside; the end of the plug shell (4) is provided with a plurality of first grooves (41), each of the first grooves (41) penetrates the inner and outer circumferential surfaces of the plug shell (4) in the radial direction, and the end surface of the plug shell (4) is used to abut against the stepped surface (14) during plugging; the end of the plug inner conductor (6) is provided with a plug hole (61), the inner end of the socket inner conductor (3) is used to be plugged into the plug hole (61) during plugging, and the end of the plug inner conductor (6) is provided with a plurality of second grooves (62), each of the second grooves (62) penetrates the outer and inner circumferential surfaces of the plug inner conductor (6) in the radial direction; the inner circumferential surface of the plug shell (4) is provided with a first annular groove (43), and the outer circumferential surface of the plug insulating medium (5) is embedded in the first annular groove (43); and the outer circumferential surface of the plug inner conductor (6) is provided with a second annular groove (63), and the inner circumferential surface of the plug insulating medium (5) is embedded in the second annular groove (63).

6. The push-in type ultra-small high-reliability radio frequency coaxial connector according to claim 5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The end of the plug housing (4) is divided into multiple petals (42) by multiple first grooves (41), and a protrusion (421) is arranged on the outer periphery of each petal (42).

7. The push-on subminiature high-reliability RF coaxial connector of claim 6, wherein: The inner peripheral wall of the connecting hole (12) is provided with an annular boss (13) along the axial middle section, and the protrusion (421) is clamped between the annular boss (13) and a stepped surface (14).

8. The push-on subminiature high-reliability RF coaxial connector of claim 7, wherein: Multiple first grooves (41) are arranged around the axis of the plug housing (4), and multiple second grooves (62) are arranged around the axis of the plug inner conductor (6); The first grooves (41) are six or four, and the second grooves (62) are two.

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