CN111355083A

CN111355083A - Insulating support and coaxial connector using same

Info

Publication number: CN111355083A
Application number: CN202010289467.8A
Authority: CN
Inventors: 詹少东
Original assignee: Somefly Technologies Co ltd
Current assignee: Somefly Technologies Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-06-30

Abstract

The invention relates to an insulating support, which comprises an insulating body with a central hole and is characterized in that the side wall of the insulating body is provided with a radial channel so that the side wall is in a hollow structure. The coaxial connector is improved on the basis of the existing first and second outer conductors, the inner conductor and the insulating support with the center hole, namely, a radial channel is formed on the side wall of the insulating body of the insulating support to enable the side wall to be in a hollow structure, and two ends of the insulating support are respectively abutted with the inner step surface of the first outer conductor and the end surface of one end of the second outer conductor. The insulating support adopting the structure can contain more air under the same size, so that the coaxial connection has better transmission characteristic. Particularly, when the insulating support is integrated with the inner conductor through an injection molding process, the concentricity and the fixing strength are improved, and meanwhile, the coaxial connector is suitable for large-scale production, so that the manufactured coaxial connector has higher market competitiveness.

Description

Insulating support and coaxial connector using same

Technical Field

The present invention relates to an insulating support and a coaxial connector using the same.

Background

With the rapid development of the communication industry, the demand for electronic devices is increasing, and the coaxial connector therein is also developing toward miniaturization, high frequency, multiple functions, etc. as a separable component for electrical connection of transmission system, i.e. the coaxial connector is also continuously updated. In order to have a better matching transmission characteristic over a wider operating frequency band, air is introduced as an insulating medium in the existing coaxial connector, and a thinner insulator is used to support the inner conductor in order to position and fix the inner conductor in the coaxial connector. The coaxial connector disclosed in the document with chinese patent No. CN103326206B includes an outer conductor, an inner conductor and an insulating support, the outer conductor is composed of a housing and a sleeve, the sleeve is provided with a slot for fixing the insulating support, the insulating support is composed of three sheet-type insulators, and is fixed in the slot of the sleeve, and the inner conductor is supported to be disposed at the center of the outer conductor. The coaxial connector can simultaneously ensure good microwave transmission performance and mechanical support strength, has excellent electrical characteristics and high mechanical reliability, and can efficiently and stably transmit microwave signals with the frequency of 65 GHz.

In addition, there is a coaxial connector disclosed in the document of chinese patent No. CN102931548B, which includes a left outer conductor, a right outer conductor, an inner conductor, an upper semi-insulating support, a lower semi-insulating support and a collar; a small-diameter cavity and a large-diameter cavity which are communicated with the central shaft are arranged in the left outer conductor; the right outer conductor is tubular and is arranged in the large-diameter cavity of the left outer conductor; the inner conductor, the upper semi-insulating support, the lower semi-insulating support and the clamping ring are all arranged in the left outer conductor; the inner conductor is bilateral symmetry structure, including the outer cylinder in a left side that connects gradually, left side compensation step cylinder, insulating support draw-in groove cylinder, right side compensation step cylinder and the outer cylinder in the right side, first insulating support encircles on insulating support draw-in groove cylinder with lower semi-insulating support together, and cramp first insulating support, lower semi-insulating support and insulating support draw-in groove cylinder through the rand, establishing of this rand is in the major diameter cavity, and is pressed from both sides by outer conductor in a left side and outer conductor in the right side, the outer wall and the outer conductor in a left side of rand are crossed tight cooperation and are connected. The coaxial connector can reduce discontinuity caused by adding insulation compensation, and ensure that the product has the characteristics of good voltage standing wave ratio and use frequency.

However, the structure of the above document is carefully analyzed, and it is found that the former document supports the inner conductor with three sheet-type insulators, which can solve the problem of eccentricity of the inner conductor, but has a great difficulty in assembly because: when the three sheet insulators are positioned in the corresponding grooves of the inner conductor and are inserted into the shell after being held tightly by the upper sleeve and the lower sleeve (the upper sleeve and the lower sleeve are tightly matched in the inner cavity of the shell), the upper sleeve and the lower sleeve are of a split structure, and are easily dispersed under external force, namely, in the assembling process, the inner conductor, the three sheet insulators and the sleeves cannot be integrally and easily inserted, so that the positioning of the inner conductor in the assembling process is influenced, and the coaxiality between the inner conductor and the outer conductor after the assembling is also influenced to a certain degree. And the sleeve is divided into an upper sleeve and a lower sleeve, so that the processing cost is high, and the coaxiality with the inner cavity of the shell is difficult to ensure.

In the coaxial connector in the latter document, only one insulating support is adopted, and although the structure is simple and the production is easy, the thickness of the insulating support is generally less than 1.7mm due to frequency, and the insulating support can not be manufactured too thin, otherwise, the inner conductor is easy to be eccentric; and cannot be made too thick, which would otherwise affect the transmission performance, so that it is difficult to achieve a balance in preventing the eccentricity of the inner conductor and the transmission performance in actual production. In order to be conveniently assembled on the inner conductor, the insulation support is required to be manufactured into a split structure of the upper and lower semi-insulation supports (the whole structure is difficult to be assembled into a clamping groove of the inner conductor in an axial sliding mode due to the increase of the thickness), and thus, the defects in the former document, namely, the upper and lower semi-insulation supports and the inner conductor are easy to scatter. Even if the surrounding is provided with the hoop of the clamping ring, in the process of inserting the clamping ring or the insulating support into the left outer conductor, when the clamping ring or the insulating support is in an axial stress state, the clamping ring, the upper semi-insulating support, the lower semi-insulating support and the semiconductor still can be separated from each other, so that the defect that the assembly is inconvenient still exists, and the transmission characteristic after the assembly is difficult to ensure is still existed. In addition, the insulating support is processed into an upper part and a lower part, which also has the defect of high processing cost.

Especially, the side walls of the existing insulating supports are of solid structures, so that the structure can be further improved by accommodating more air between the inner conductor and the outer conductor.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an insulating support capable of accommodating more air under the same condition, aiming at the current state of the prior art.

A second technical problem to be solved by the present invention is to provide a coaxial connector capable of accommodating more air under the same condition and having better transmission characteristics, in view of the current state of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: an insulator support comprising an insulator body with an axially extending central bore, wherein: the side wall of the insulation body is provided with a radial channel so that the side wall is in a hollow structure.

In the above solution, it is preferable that the insulation body is designed as a cylindrical body formed by a helical wire, and gaps between adjacent helical turns in the cylindrical body form the radial channels. And more air can be contained while the supporting strength is satisfied.

In order to further improve the strength of the insulating support, axial ribs are connected between adjacent spiral turns in the cylindrical body to prevent the insulating support from axially contracting.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides a coaxial connector, including first outer conductor, second outer conductor, inner conductor and insulating support, have coaxial distribution and the little diameter chamber and the big diameter chamber that communicate each other in the first outer conductor inner wall between big, the little diameter chamber is formed with interior step face, the second outer conductor cavity and the one end of this second outer conductor are connected with the big diameter chamber of first outer conductor, be provided with the draw-in groove on the inner conductor, insulating support is including the insulator body that has axially extended centre bore, and this insulating support is established through the centre bore card in the draw-in groove of inner conductor, its characterized in that: the side wall of the insulating body is provided with a radial channel so that the side wall is in a hollow structure, and two ends of the insulating support are respectively abutted against the inner step surface of the first outer conductor and the end surface of one end of the second outer conductor.

Similarly, in the above coaxial connector, it is preferable that the insulating body is designed as a cylindrical body formed by a helical wire, and a gap between adjacent helical turns in the cylindrical body forms the radial passage.

Similarly, the axial ribs are preferably connected between adjacent spiral coils in the cylindrical body, so that the support strength can be improved, and the axial shrinkage of the insulating support is prevented.

In the coaxial connector, the number of the insulating supports is only one, so that the requirement of supporting strength can be met, and the problem of eccentricity of the inner conductor can be prevented.

In the above coaxial connector, the combination of the insulating support and the inner conductor is preferably such that the insulating support is made in one piece with the inner conductor by injection molding.

In order to facilitate demoulding during injection molding, the section of the wire rod is rectangular, and the axial width of the rectangular section is smaller than the radial height.

Compared with the prior art, the side wall of the insulating support is designed into the hollow structure, so that when the insulating support is applied to a coaxial connector, more air can be contained under the same size, and the coaxial connector has better transmission characteristics. Particularly, when the insulating support is combined with the inner conductor into a whole through an injection molding process, the concentricity and the fixing strength are improved, and meanwhile, the insulating support is suitable for large-scale production, and the clamping ring and the assembly of the clamping ring in the prior art are eliminated, so that the production cost can be reduced; by adopting the insulating support, the axial length of the coaxial connector can be lengthened under the same effective supporting area, so that the mechanical strength of the coaxial connector can be met by only adopting one insulating support, and the inner conductor is ensured not to be eccentric easily; therefore, the insulating support can make the manufactured coaxial connector more competitive in the market.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the inner conductor and insulating support of FIG. 1;

FIG. 3 is a schematic cross-sectional view of an embodiment of the invention after injection molding of the insulating support and the inner conductor;

FIG. 4 is a perspective view of FIG. 3;

fig. 5 is an exploded perspective view of fig. 4.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

In the description of the present invention, it is to be understood that the terms "center", "depth", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description and for simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and that the directional terms are for illustrative purposes only and should not be construed as limiting since the disclosed embodiments of the present invention can be arranged in different directions, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The coaxial connector shown in fig. 1 is an insulator which adopts an insulating support with a special structure as a supporting inner conductor, and comprises a first outer conductor 1, a second outer conductor 2, an inner conductor 3 and an insulating support 4, wherein the first outer conductor 1 is internally provided with a small-diameter cavity 11 and a large-diameter cavity 12 which are coaxially distributed and mutually communicated, and an inner step surface 13 is formed on the inner wall of the first outer conductor between the large-diameter cavity and the small-diameter cavity; the second outer conductor 2 is hollow and one end of the second outer conductor 2 is connected to the large-diameter cavity 12 of the first outer conductor 1, and in fig. 1, one end of the second outer conductor 2 is directly inserted into the large-diameter cavity 12 of the first outer conductor 1 (i.e., one end of the second outer conductor 2 becomes an insertion end). Of course, the second outer conductor 2 and the first outer conductor 1 can be assembled in other ways, as long as the fixed connection between the first outer conductor and the second outer conductor is satisfied.

The inner conductor 3 is provided with a plurality of slots 31 at intervals in the axial direction. The corresponding insulating support 4 is also only one, and the insulating support 4 comprises an insulating body with an axially extending central hole 41, and the insulating support 4 is clamped in the clamping groove 31 of the inner conductor 3 through the central hole 41. And the side wall of the insulating body is provided with a radial channel 42 to make the side wall in a hollow structure, and two ends of the insulating support 4 are respectively abutted against the inner step surface 13 of the first outer conductor 1 and the end surface of one end of the second outer conductor 2.

The side wall of the insulating support 4 is designed to be a hollow structure, and the hollow structure can be in various forms, such as radial round holes uniformly distributed on the side wall. Or through holes of different shapes. But it is more preferred that: the insulating body is designed as a cylindrical body formed by a helical wire, the gaps between adjacent turns in the cylindrical body forming said radial channels 42. By adopting the structure, the aperture ratio is higher, more air can be contained, and the axial pressure resistance and the mechanical strength are good. In order to further increase the strength of the insulating support 4, reinforcing ribs 43 are added in the figure, i.e. axial ribs 43 are connected between adjacent spiral turns in the cylindrical body, as shown in fig. 1 and 2, four axial ribs 43 are uniformly distributed along the circumferential direction to prevent the cylindrical body from axially shrinking.

The insulating support 4 with the above structure is combined with the inner conductor 3 in a sleeving manner, at this time, the central hole 41 matched with the clamping groove 31 is located on two end faces of the cylindrical body, for convenience of distinction, the cylindrical body is called as a first cylindrical body 4a at this time, and the aperture in the middle of the first cylindrical body 4a communicated with the central hole is larger than the outer diameter of the inner conductor 3, so that when the insulating support 4 moves axially on the inner conductor, the resistance can be reduced, and when the insulating support 4 moves to the clamping groove 31 of the inner conductor 3, the insulating support can fall into the clamping groove 31, as shown in fig. 1 and fig. 2.

However, the combination between the insulating support 4 and the inner conductor 3 in the above structure is preferably realized by injection molding, that is, the inner conductor 3 is used as a core, and when the insulating support 4 is injection molded, the inner conductor 3 is embedded in the injection molded insulating support 4, so that the insulating supports 4 are placed in the clamping grooves 31 to form an integral piece with each other, and at this time, the ribs may be designed into three strips which are respectively and uniformly distributed along the circumferential direction, please refer to the structures in fig. 3 to 5. The cylindrical bodies in fig. 3 to 5 (hereinafter referred to as the second cylindrical body 4b) can contain relatively little air with respect to the first cylindrical body 4a in fig. 1 and 2, but with injection molding, the overall positioning is more secure, precise, more concentric, non-eccentric, and easy to mass-produce, resulting in lower cost.

In view of the strength of the insulating support 4, and in order to facilitate the demolding during the injection molding, the cross section of the wire rod is designed to be rectangular, and the axial width w of the rectangular cross section is smaller than the radial height h, see fig. 3.

Such a unitary piece may be used in a variety of applications, such as a male connector, a female connector, or an adapter.

When the integrated inner conductor 3 and the insulating support 4 are assembled into the outer conductor, the inner conductor 3 with the insulating support 4 is inserted into the large-diameter cavity 12 of the first inner conductor 1, so that one end face (i.e. the left end face in the figure) of the insulating support 4 abuts against the inner step face 13, and then the second outer conductor 2 is tightly inserted into the large-diameter cavity 12 of the first outer conductor 1, so that the right end face of the insulating support abuts against the insertion end (i.e. the left end face of the second outer conductor 2 in the figure) of the second outer conductor 2. In this embodiment, in order to ensure the strength of the second outer conductor 2, the large diameter cavity 12 in the first outer conductor 1 is made into two large diameter cavities with different diameters, that is, a first large diameter cavity 12a and a second large diameter cavity 12b, the first large diameter cavity 12a is located between the small diameter cavity 11 and the second large diameter cavity 12b, the insulating support 4 is located in the first large diameter cavity 12a, and the second outer conductor 2 is tightly inserted into the second large diameter cavity 12b, which is more beneficial to improving the strength of the second outer conductor 2.

When the axial length of the insulating support 4 is short (for example, a disk-shaped body), two or more insulating supports may be provided on the same coaxial connector according to the support requirement of the coaxial connector.

In addition to the above structure, the first outer conductor 1 of the coaxial connector may be provided with a first screw sleeve 5 according to the prior art, and the second outer conductor may be provided with a second screw sleeve 6 connected to an external plug through the first and second screw sleeves.

In this embodiment, the two ends of the inner conductor 3 have the same structure, and of course, the inner conductor can be made into different structures according to the plugging requirement in the prior art, so as to meet the plugging requirement in different occasions.

Claims

1. An insulating support comprising an insulating body with an axially extending central bore (41), characterized in that: the side wall of the insulation body is provided with a radial channel (42) so that the side wall is in a hollow structure.

2. The insulating support of claim 1, wherein: the insulating body is designed as a cylindrical body formed by helical wires, the gaps between adjacent helical turns in the cylindrical body forming the radial channels (42).

3. The insulating support of claim 2, wherein: axial ribs (43) are connected between adjacent spiral turns in the cylindrical body.

4. The utility model provides a coaxial connector, including first outer conductor (1), second outer conductor (2), inner conductor (3) and insulating support (4), have coaxial distribution and the little diameter chamber (11) and the big diameter chamber (12) that communicate each other in first outer conductor (1) first outer conductor inner wall between big, the little diameter chamber is formed with interior step face (13), second outer conductor (2) cavity and the one end of this second outer conductor (2) are connected with the big diameter chamber of first outer conductor (1), be provided with draw-in groove (31) on inner conductor (3), insulating support (4) are including the insulator body that has axially extended centre bore (41), and this insulating support (4) are established through centre bore (41) card in the draw-in groove (31) of inner conductor, its characterized in that: the side wall of the insulating body is provided with a radial channel (42) to form a hollow structure, and two ends of the insulating support (4) are respectively abutted with the inner step surface (13) of the first outer conductor and the end surface of one end of the second outer conductor (2).

5. The coaxial connector of claim 4, wherein: the insulating body is designed as a cylindrical body formed by helical wires, the gaps between adjacent helical turns in the cylindrical body forming the radial channels (42).

6. The coaxial connector of claim 5, wherein: axial ribs (43) are connected between adjacent spiral turns in the cylindrical body.

7. The coaxial connector of claim 4, wherein: the number of the insulating supports (4) is only one.

8. The coaxial connector of claim 4, wherein: the insulating support (4) is integrated with the inner conductor (3) by injection molding.

9. The coaxial connector of claim 5, 6 or 7, wherein: the insulating support (4) is integrated with the inner conductor (3) by injection molding.

10. The coaxial connector of claim 9, wherein: the cross section of the wire rod is rectangular, and the axial width (w) of the rectangular cross section is smaller than the radial height (h).