CN214378771U

CN214378771U - Convex insulator of shell step

Info

Publication number: CN214378771U
Application number: CN202120125128.6U
Authority: CN
Inventors: 徐浩; 陈宁
Original assignee: Nanjing Hengdian Electronics Co ltd
Current assignee: Nanjing Hengdian Electronics Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-08
Anticipated expiration: 2031-01-18

Abstract

The utility model provides a protruding formula insulator of shell step, the insulator includes inner conductor, shell and packing medium, and the inner conductor passes the shell and is in coaxial position with the shell, adopts the packing medium to fill between inner conductor and the shell, and the periphery of shell sets up the step arch, and the protruding axial length of step is less than the length of shell and tip between them is not in the coplanar. The utility model discloses the insulator atress is even during the installation, can not crooked, and the inner conductor can not the atress buckle, and middle packing medium can not the fracture.

Description

Convex insulator of shell step

Technical Field

The utility model relates to a radio frequency connects, specifically relates to a protruding formula insulator of shell step.

Background

With the development of communication and radar, the insulator radio frequency connector is more and more widely used for various communication devices, and the insulator radio frequency connector can be sintered, so that the air tightness is good, and the application is more extensive in military.

As shown in fig. 3, the conventional insulator radio frequency connector is a common insulator housing 5, and if the common insulator is directly placed on a microwave board 8 when the common insulator is sintered, since the installation limiting surface of the device insulator mounting hole only provides single-side stress, the stress is uneven and easy to deflect, the inner conductor is bent by assembly thrust 9, and the pressure is uneven and distributed on the housing 5, so that the glass filled in the middle is easy to crack. A new solution is needed to solve this technical problem.

Disclosure of Invention

In order to solve the problem, the utility model discloses a protruding formula insulator of shell step. The utility model discloses a protruding formula insulator of shell step, the insulator includes inner conductor, shell and packing medium, the inner conductor pass the shell and with the shell is in coaxial position, the inner conductor with adopt the packing medium to fill between the shell, a serial communication port, the periphery of shell sets up the step arch, the protruding axial length of step is less than the length of shell and tip between them are not in the coplanar.

When the shell step convex insulator provided by the technical scheme is installed, the insulator is stressed uniformly and cannot be inclined, the inner conductor cannot be stressed and bent, and the filling medium between the inner conductor and the convex step ring shell is not easy to crack.

As the preferable technical scheme, the cross sections of the shell and the inner conductor are circular, and the ratio of the inner diameter of the shell to the diameter of the inner conductor ranges from 4.85 to 5.35.

As a preferable scheme of the above technical scheme, the cross sections of the outer shell and the inner conductor are both square, and the ratio of the cross section diagonal of the outer shell to the cross section diagonal of the inner conductor ranges from 4.85 to 5.35.

As a preferable scheme of the technical scheme, two ends of the inner conductor protrude out of two ends of the shell by 1-5 mm respectively.

As a preferable scheme of the technical scheme, the inner conductor is processed by a kovar alloy material, and the surface of the inner conductor is plated with gold; or the inner conductor is processed by a low-magnetism titanium alloy material, and the surface of the inner conductor is plated with gold.

Preferably, the filling medium is glass having a dielectric constant in the range of 5.5 to 5.8.

As a preferable mode of the above technical means, an axial length of the step convex portion is 0.5 to 1 mm.

As a preferable proposal of the technical proposal, the distance range of the starting point of the step bulge on the shell from the port of the shell in the axial direction is 0.2-0.3 mm.

Compared with the prior art, the invention has the following advantages: 1) the insulator is stressed uniformly and cannot be skewed during installation, and the inner conductor cannot be stressed and bent, 2) the insulator shell is stressed uniformly during installation, and the middle filling medium is not easy to crack, 3) if the inner conductor material is processed by low-magnetism titanium alloy, the impedance is low when the microwave transmission is more than 30GHz, and 4) if the cross section of the inner conductor material is square, the welding and gold wire bonding are facilitated; 5) insulatorMachining of joint mounting holesIn the process, the insulator and the insulator mounting hole naturally form a solder groove, and the separate groove does not need to be formed, so that the processing time of the mounting hole is saved.

Description of the drawings:

FIG. 1 is a schematic sectional view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic view of a radio frequency interface mounting structure of a common insulator;

fig. 4 is a schematic view of a radio frequency interface mounting structure of a raised insulator with a step on a housing according to an embodiment of the present invention;

fig. 5 is a schematic size diagram of a stepped raised insulator of a housing according to an embodiment;

wherein: 1. an inner conductor; 2. a housing; 3. a glass medium; 4. step bulges; 5. a common insulator housing; 6. a solder ring; 7. A connector mounting hole; 8. a microwave board; 9. assembling a clamping force; h1, shell length; h2, step projection axial length; d1, shell diameter; d2, diameter of step protrusion; d. the diameter of the inner conductor; h. the diameter of the solder.

Detailed Description

For the purpose of promoting an understanding and appreciation of the invention, further description and explanation of the invention are provided below in connection with the accompanying drawings and embodiments.

Example (b): a raised step insulator, as shown in fig. 1 and 2, comprising: the insulator comprises an inner conductor 1, a shell 2 and a filling medium, wherein the inner conductor 1 penetrates through the shell 2 and is positioned at the coaxial position with the shell 2, the inner conductor 1 and the shell 2 are filled with the filling medium, a step bulge 4 is arranged on the periphery of the shell 2, the axial length of the step bulge 4 is smaller than that of the shell 2, and the end parts of the step bulge 4 and the shell are not positioned on the same plane.

In a specific embodiment, the glass medium 3 with a dielectric constant of 5.5-5.8 is optionally used as the medium filled in the middle of the inner conductor 1 to ensure that the impedance of the step-type insulator is 50 Ω.

In this embodiment, the inner conductor 1 is processed by a round bar, the cross sections of the outer shell 2 and the inner conductor 1 are circular, and the ratio of the inner diameter of the outer shell 2 to the diameter of the inner conductor 1 is 4.85-5.35, so as to ensure that the impedance of the raised step insulator is 50 Ω. In other embodiments, the material of the inner conductor 1 can also be processed by a square bar with a cross section, so that the weldability is improved, and the ratio of the inner diameter of the shell 2 to the diagonal dimension of the radial cross section of the inner conductor 1 processed by the square bar is 4.85-5.35, so as to ensure that the impedance of the convex step insulator is 50 Ω.

Or in a specific embodiment, the cross sections of the outer shell 2 and the inner conductor 1 can be set to be square, and the ratio of the diagonal dimension of the radial section of the outer shell 2 to the diagonal dimension of the radial section of the inner conductor 1 formed by processing a square bar is 4.85-5.35, so as to ensure that the impedance of the convex step insulator is 50 Ω.

In a specific embodiment, optionally, two ends of the inner conductor 1 protrude out of two ends of the outer shell 2 by 2-3 mm respectively, so that the assembling performance and the microwave transmission performance of the raised step insulator are improved.

The outer shell 2 in the embodiment can be arranged at the middle position of the outer periphery of the inner conductor 1, and the specific position can also be arranged according to the practical application situation. The step protrusion 4 is arranged on the outer periphery of the housing 2, and can be arranged at an intermediate position or according to the practical application. The radial section of the step protrusion 4 may be circular or square, and the like, without limitation. In this embodiment, as shown in fig. 4, the starting point of the step projection 4 on the housing is 0.2-0.3mm from the port of the housing 2 in the axial direction to accommodate the solder to realize the insulatorMachining of joint mounting holesIn the process, the insulator and insulatorThe flange mounting hole naturally forms a solder groove, and a separate groove is not needed, so that the processing time of the mounting hole is saved.

In the specific embodiment, the material of the inner conductor 1 is processed by low-magnetism titanium alloy, and the surface is plated with gold to ensure the weldability and the electromagnetic transmission performance is not influenced above high frequency (30 GHz). The material of the inner conductor 1 can also be processed by kovar alloy (kovar), so that the processing difficulty is reduced, and the surface gold plating ensures the weldability and the corrosion resistance.

The utility model provides a protruding step insulator radio frequency interface mounting structure schematic diagram is shown in fig. 4, not only the insulator body is taken on microwave board 8 when sintering ordinary insulator, shell 2 is also taken on microwave board 8, so the spacing face of installation only provides multilateral atress, the atress is evenly difficult to crooked, consequently inner conductor 1 can not receive assembly thrust 9 and bend, pressure then evenly distributed is on casing welding material ring 6 in addition, consequently, the packing medium does not ftracture in the middle of the inner conductor.

The dimension schematic diagram of the protruding insulator of the housing step provided by the specific embodiment is shown in fig. 5, and the length H1 of the housing is not more than 5mm, so that the practicability is improved, and the impedance of microwave transmission is reduced. The step bulge 4 on the shell is in a circular ring shape, the diameter D2 of the step bulge is equal to the diameter D1 of the shell plus twice the diameter h of solder, and the diameter h of the solder is generally 0.2-0.3 mm.

The axial length H2 of the step bulge 4 is 0.5-1mm, so that certain structural strength is ensured, and when the bulge step insulator is installed, the effect of uniform stress on positioning and installation is achieved.

The step protrusion 4 axial length H2 is less than the housing length H1. The starting point of the stepped projection 4 on the housing 2 is 0.2-0.3mm from the port of the housing 2 in the axial direction, i.e., the solder ring thickness h.

Referring to fig. 4, when the stepped insulator is installed, the stepped insulator is pushed into the insulator terminal installation hole 7, and is pressed against the installation limiting surface of the installation hole by an installation clamping force. Then put into a solder ring, and heat is carried out at 180 ℃ or 220 ℃ according to the solder performance.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. The utility model provides a protruding formula insulator of shell step, the insulator includes inner conductor, shell and packing medium, the inner conductor pass the shell and with the shell is in coaxial position, the inner conductor with adopt the packing medium to fill between the shell, its characterized in that, the periphery of shell sets up the step arch, the protruding axial length of step is less than the length of shell and tip between them are not in the coplanar.

2. The shell step-up insulator as claimed in claim 1, wherein the cross-sections of the shell and the inner conductor are circular, and the ratio of the inner diameter of the shell to the diameter of the inner conductor is in the range of 4.85-5.35.

3. The shell step-type insulator as claimed in claim 1, wherein the cross-sections of the shell and the inner conductor are square, and the ratio of the diagonal of the cross-section of the shell to the diagonal of the cross-section of the inner conductor is 4.85-5.35.

4. The shell step-type insulator as claimed in claim 1, wherein both ends of the inner conductor protrude from both ends of the shell by 1-5 mm.

5. The housing step bulge insulator as claimed in claim 1, wherein said inner conductor is made of kovar alloy material and is plated with gold on its surface; or the inner conductor is processed by a low-magnetism titanium alloy material, and the surface of the inner conductor is plated with gold.

6. The shell step raised insulator of claim 1, wherein said filling medium is glass having a dielectric constant in the range of 5.5-5.8.

7. The stepped insulator of claim 1, wherein the axial length of said housing is 1.5-5 mm.

8. The shell step-up insulator of claim 1, wherein the thickness of the shell is 0.5-2 mm.

9. The stepped insulator of claim 1, wherein the stepped projection of the housing is formed at a distance in the range of 0.2-0.3mm from the port of the housing in the axial direction.

10. The stepped insulator of claim 1, wherein the axial length of the step is 0.5-1 mm.