Radio frequency coaxial connector structure with replaceable interface

Abstract

The utility model relates to a radio frequency coaxial connector structure with a replaceable interface, which comprises an outer conductor with a hollow interior, and an insulator and a contact pin which are arranged in the outer conductor, a vertical mounting cavity is formed in the insulator, the contact pin comprises a pin rod which is vertically inserted into the mounting cavity, two ends of the pin rod extend out of the mounting cavity, and threaded blind holes are formed in the two ends of the pin rod; the male head and the female head are respectively and spirally connected in the blind holes at the two ends of the needle rod. The contact pin is fixedly installed in a sectional mode through the pin rod, the male head and the female head are both in detachable threaded connection, the male head and the female head can be provided with multiple sets of different specifications for replacement, the proper male head and the proper female head can be conveniently selected for connection according to the requirements of different clients or equipment, and when the contact pin is abraded and needs to be replaced after being used for a long time, the contact pin can be replaced conveniently. And only the male head or the female head needs to be replaced, and the whole coaxial radio frequency connector does not need to be replaced, so that the cost is greatly saved. And the production process of the needle rod part is stable, standardized production can be realized, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency coaxial connector technical field, concretely is a replaceable interface radio frequency coaxial connector structure. BACKGROUND

[0002] SMA type radio frequency coaxial connector is a kind of widely used small-sized threaded connection coaxial connector, it is usually composed of outer conductor, insulator and needle part, with the characteristics of wide frequency band, high performance, high reliability and long service life.When it is used to carry out signal transmission between vacuum and atmosphere, other equipment is needed to be inserted on both sides of needle to guide signal, and is connected or disconnected by plug-in form to complete signal transmission.The SMA type radio frequency coaxial connector commonly used at present has some deficiencies:

[0003] 1, the insertion interface of needle is easily oxidized, causing the conductivity to drop, and the contact to be poor;

[0004] 2, after long-term repeated plug-in use, the insertion interface is worn, causing poor contact or short circuit, the entire SMA type radio frequency coaxial connector needs to be replaced, and the performance of new product is re-evaluated, causing the reduction of work efficiency and the increase of use cost;

[0005] 3, the interface form of both sides of needle is fixed, and the use interface of both sides of equipment is limited;

[0006] 4, the insulator is easily oxidized and broken down under long-term conduction use, and the service life of product is low. INVENTION CONTENTS

[0007] To solve the technical problems of needle and insulator easy to oxidize, low service life, insertion interface easy to wear, coaxial connector needs to be replaced as a whole after wear, high cost and single interface form of both sides of needle and high limitation, the utility model provides a replaceable interface radio frequency coaxial connector structure.

[0008] The utility model technical scheme is as follows:

[0009] A replaceable interface radio frequency coaxial connector structure, including the hollow outer conductor in the inside, and the insulator and needle arranged in its inside;The insulator is internally provided with vertical installation cavity, the needle includes needle stem inserted into installation cavity vertically, both ends of the needle stem extend out of installation cavity and are provided with threaded blind hole at both ends;It also includes male head and female head respectively screw-connected in the blind hole of both ends of needle stem.

[0010] The pin is in a segmented type, and the pin rod is fixedly installed. The male head and the female head are detachably connected through threads. Multiple sets of different specifications of the male head and the female head can be arranged for replacement. According to the requirements of different customers or equipment, the appropriate male head and female head can be selected for connection. When the pin is worn after long-term use, only the male head or the female head needs to be replaced, and the entire coaxial radio frequency connector does not need to be replaced, thereby greatly saving the cost. The pin rod part has stable production process and can be produced in a standardized manner, thereby improving the production efficiency.

[0011] In order to improve the corrosion resistance and wear resistance of the male head and the female head and reduce the loss, the male head and the female head are provided with a gold plating layer on the surface, thereby reducing the risk of jamming during thread rotation and improving the service life of the entire product.

[0012] Specifically, the male head and the female head each include an SMA connector, and one end of the connector is provided with a threaded column capable of being matched with a blind hole. The threaded column has a size of M1.2-M1.7, and the production process of the threaded column is stable and has high production efficiency. The male head and the female head can be randomly connected in the blind hole at any end of the pin rod, and have high flexibility.

[0013] Further, the insulator includes a fixed column arranged vertically and a boss above the fixed column, and an outer diameter of the boss is smaller than an outer diameter of the fixed column. The fixed column and the boss are both cylindrical and coaxially arranged. The fixed column serves to connect with the outer conductor, reduces the weight of the insulator while ensuring the connection strength, and ensures the stability of the overall center of gravity of the insulator.

[0014] As a preferred embodiment, the outer circle of the upper end of the pin rod is further provided with a transition piece in contact with the upper side of the fixed column. The transition piece increases the contact area between the pin rod and the insulator, and enhances the connection strength. Silver-based solder is arranged between the transition piece and the fixed column, facilitating the brazing connection therebetween.

[0015] Preferably, a metallization layer is arranged on the upper side of the boss and the circumferential surface of the fixed column, and a glaze layer is arranged on the insulator at a position other than the metallization layer. The metallization layer and the glaze layer can increase the mechanical strength, thermal stability, dielectric strength and corrosion resistance of the insulator.

[0016] In order to avoid the risk of cracking of the pin rod and the transition piece and better ensure the size and concentricity requirements therebetween, the pin rod and the transition piece are integrally processed and formed, thereby reducing the material cost and improving the processing efficiency.

[0017] As a preferred embodiment, the outer conductor is in a columnar structure, and one end of the outer conductor is provided with an outer diameter thread capable of being connected with a transmission cable. The thread facilitates the connection between the whole and the transmission cable or other elements, and is simple and fast.

[0018] Further preferably, the material of the outer conductor is oxygen-free copper or stainless steel or nickel or molybdenum, which has the properties of high conductivity, good processing performance and welding performance, corrosion resistance and low temperature performance.

[0019] Further, the material of the pin is stainless steel or nickel or Kovar alloy 4J29 or Kovar alloy 4J33 or oxygen-free copper or molybdenum or tungsten or tungsten copper, which not only has high conductivity, but also has good cold and hot processing performance, and can be made into various complex-shaped parts.

[0020] Through the above design, the beneficial effects of the utility model of the replaceable interface RF coaxial connector structure are that the pin is in a segmented type, the needle rod is fixedly installed, the male head and the female head are detachably connected through threads, and the male head and the female head can be provided with multiple groups of different specifications for replacement, and appropriate male heads and female heads can be selected for connection according to the needs of different customers or equipment.

[0021] When the pin needs to be replaced due to wear after long-term use, only the male head or the female head needs to be replaced, and the entire coaxial RF connector does not need to be replaced, thereby greatly saving the cost.

[0022] The male head and the female head are both provided with a gold plating layer, which improves the corrosion resistance and wear resistance, reduces the loss, reduces the risk of jamming during thread rotation, and prolongs the service life of the entire product.

[0023] As for the insulator, the metal layer is arranged on the circumferential surface of the fixing column in contact with the outer conductor and the upper side of the boss, and the glaze layer is arranged on the remaining outer surface, so that the mechanical strength, thermal stability, dielectric strength and corrosion resistance are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In the drawings:

[0025] Figure 1 It is a front view of the replaceable interface RF coaxial connector structure of the utility model;

[0026] Figure 2 It is Figure 1 It is an A-A sectional view in the middle;

[0027] Figure 3 It is a schematic view of the pin in the embodiment;

[0028] Figure 4 It is a schematic view of multiple groups of different specifications of male heads and female heads in the embodiment;

[0029] Figure 5 It is a schematic view of different connection modes of the male head and the female head in the embodiment;

[0030] The components represented by the reference numerals in the drawings are:

[0031] 1, outer conductor; 2, insulator; 21, fixed column; 22, boss; 3, pin; 31, needle rod; 32, blind hole; 33, transition piece; 4, male head; 5, female head; 6, external diameter thread. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings.

[0033] Embodiment

[0034] In combination Figures 1 to 3 , the embodiment improves a replaceable interface RF coaxial connector structure, which includes an inner hollow outer conductor 1, and an insulator 2 and a pin 3 arranged inside the outer conductor 1. The outer conductor 1 and the pin 3 are an outer metal shielding layer and a center conductor respectively, and the two are separated by the insulator 2 to prevent signal interference and leakage, and to ensure the stability of the signal transmission of the connector (the above-mentioned replaceable interface RF coaxial connector structure).

[0035] As a preferred embodiment, the outer conductor 1 is in a cylindrical structure, one end of which is an atmospheric side, provided with an external diameter thread 6 capable of being connected with a transmission cable, and through the cooperation of the thread, the overall connection between the transmission cable or other elements can be facilitated, which is simple and fast. The other side is a vacuum side capable of being connected with a flange, and the inner diameter range of the vacuum side is 3.5-6 mm.

[0036] Further preferably, the material of the outer conductor 1 is oxygen-free copper or stainless steel or nickel or molybdenum, which has the properties of high electrical conductivity, good processing performance and welding performance, corrosion resistance and low temperature performance.

[0037] In the embodiment, the insulator 2 includes a vertically arranged fixed column 21 and a boss 22 above it; and the outer diameter size of the boss 22 is smaller than that of the fixed column 21. Both the fixed column 21 and the boss 22 are cylindrical, and they are coaxially arranged, wherein the fixed column 21 plays a role in connecting with the outer conductor 1, which reduces the weight of the insulator 2 itself while ensuring the connection strength, and the coaxial arrangement can ensure the stability of the overall center of gravity of the insulator 2. It should be noted that before the fixed column 21 and the outer conductor 1 are brazed together, a gap is provided between them, which is between 0.08-0.15 mm.

[0038] Preferably, a metallized layer is provided on the upper side of the boss 22 and the circumferential surface of the fixed column 21, and a glaze layer is provided on the outer surface of the insulator 2 except the metallized layer. The provision of the metallized layer and the glaze layer can increase the mechanical strength, thermal stability, dielectric strength and corrosion resistance of the insulator 2. The metallized layer is treated by molybdenum-manganese method, and the thickness of the metallized layer is MoMn: 10-30 um, and the thickness of the nickel plating layer is 2-10 um; the depth of the glaze layer is 0.05-0.1 um.

[0039] In specific implementation, the insulator 2 is made of ceramic material, which can be selected from 95% or 97% or 99% aluminum oxide, or 95% or 97% or 99% zirconium oxide, or zirconium oxide toughened aluminum oxide, etc., and has high electrical insulation, mechanical strength and high temperature resistance.

[0040] In combination Figure 3 In this embodiment, the insulator 2 is internally provided with a vertical mounting cavity, the mounting cavity is provided through the fixed column 21 and the boss 22, and is arranged in the middle of the insulator 2. The pin 3 includes a needle rod 31 vertically inserted into the mounting cavity, the diameter of the needle rod 31 is in the range of 1.5-2.5 mm, both ends of the needle rod 31 extend out of the mounting cavity, and both ends are provided with threaded blind holes 32, and the size of the blind hole 32 is between M1.2-M1.7.

[0041] As a preferred embodiment, the outer circle of the upper end of the needle rod 31 is further provided with a transition piece 33 in contact with the upper side of the fixed column 21. By providing the transition piece 33, the contact area between the needle rod 31 and the insulator 2 is increased, and the connection strength is enhanced. Moreover, silver-based solder is placed between the transition piece 33 and the fixed column 21, facilitating the brazing connection between the two.

[0042] To avoid the risk of cracking of the needle rod 31 and the transition piece 33, and better ensure the size and concentricity requirements between the two, the needle rod 31 and the transition piece 33 are integrally processed and formed, which reduces the material cost and improves the processing efficiency.

[0043] The pin 3 further includes a male head 4 and a female head 5 respectively screw-connected in the blind holes 32 at both ends of the needle rod 31. The pin 3 is in segmented type, the needle rod 31 is fixedly installed, the male head 4 and the female head 5 are detachably connected by threads, and in combination Figure 4 and Figure 5 The male head 4 and the female head 5 can be provided with multiple groups of different specifications for replacement, which facilitates the selection of appropriate male head 4 and female head 5 for connection according to the needs of different customers or equipment. When the pin 3 is worn out after long-term use and needs to be replaced, only the male head 4 or the female head 5 needs to be replaced, without the need to replace the entire coaxial RF connector, which greatly saves the cost. Moreover, the needle rod 31 part has stable production process and can be produced in standardization, improving the production efficiency.

[0044] In order to improve the corrosion resistance and wear resistance of the male head 4 and the female head 5, and reduce the loss, the surface of the male head 4 and the female head 5 is provided with a gold plating layer, and the thickness of the gold plating layer is not less than 0.2 um, which reduces the risk of jamming during thread rotation and improves the service life of the entire product.

[0045] Specifically, the male head 4 and the female head 5 each comprise an SMA connector, one end of the connector is provided with a threaded column capable of matching the blind hole 32, the threaded column is M1.2~M1.7 in size, the threaded column is stable in production process and high in production efficiency. The male head 4 and the female head 5 can be connected in the blind hole 32 at any end of the needle rod 31, and the flexibility is high.

[0046] Further, the material of the pin 3 is stainless steel or nickel or Kovar 4J29 or Kovar 4J33 or oxygen-free copper or molybdenum or tungsten or tungsten copper, which not only has high conductivity, but also has good cold and hot processing performance, and can be made into various complex-shaped parts.

[0047] In the production, the insulator 2 is first placed in the outer conductor 1, silver-based solder (AgCu28 or AgCuPd10, etc.) is placed at the gap between the insulator 2 and the outer conductor 1 to ensure that the two parts are tightly attached; the same kind of silver-based solder is also placed on the upper side of the boss 22, then the needle rod 31 is inserted into the insulator 2, and the transition piece 33 is tightly attached to the upper side of the boss 22, then the assembled component is placed in a vacuum brazing furnace for vacuum brazing, and after the furnace is taken out, the connector airtightness and the coaxial size of the pin 3 and the outer conductor 1 are detected, and preferably the male head 4 and the female head 5 are connected and tightened at both ends of the needle rod 31 according to the requirements.

[0048] Through the above design, the pin 3 of the replaceable interface RF coaxial connector structure is in a segmented type, the needle rod 31 is fixedly installed, the male head 4 and the female head 5 are detachably connected by threads, and the male head 4 and the female head 5 can be provided with multiple groups of different specifications for replacement, and appropriate male heads 4 and female heads 5 are selected for connection according to the requirements of different customers or equipment. When the pin 3 needs to be replaced due to wear after long-term use, only the male head 4 or the female head 5 needs to be replaced, and the entire coaxial RF connector does not need to be replaced, which greatly saves the cost. The male head 4 and the female head 5 are each provided with a gold plating layer on the surface to improve the corrosion resistance and wear resistance, reduce the loss, reduce the risk of jamming during threaded rotation, and improve the service life of the entire product. As for the insulator 2, the circumferential surface of the fixing column 21 in contact with the outer conductor 1 and the upper side of the boss 22 are provided with a metallized layer, and in addition, an enamel layer is provided on the remaining outer surface to increase the mechanical strength, thermal stability, dielectric strength and corrosion resistance.

Claims

1. A replaceable interface RF coaxial connector structure, characterized in that, It includes an outer conductor (1) that is hollow inside, and an insulator (2) and a pin (3) disposed inside it. The insulator (2) has a vertical mounting cavity inside, and the pin (3) includes a pin rod (31) that is vertically inserted into the mounting cavity. Both ends of the pin rod (31) extend out of the mounting cavity and are provided with threaded blind holes (32) at both ends. It also includes a male head (4) and a female head (5) that are respectively spirally connected to the blind holes (32) at both ends of the needle bar (31).

2. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, Both the male connector (4) and the female connector (5) are plated with gold.

3. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, Both the male connector (4) and the female connector (5) include an SMA connector, one end of which is provided with a threaded post that can match the blind hole (32).

4. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, The insulator (2) includes a vertically arranged fixed post (21) and a boss (22) above it. Furthermore, the outer diameter of the boss (22) is smaller than the outer diameter of the fixed post (21).

5. The interchangeable interface RF coaxial connector structure according to claim 4, characterized in that, The needle bar (31) is also provided with a transition piece (33) on the outer ring of the upper end, which is in contact with the upper side of the fixing post (21).

6. The interchangeable interface RF coaxial connector structure according to claim 5, characterized in that, The upper side of the boss (22) and the periphery of the fixing post (21) are provided with a metallization layer, and the outer surface of the insulator is provided with an enamel layer in addition to the metallization layer.

7. The interchangeable interface RF coaxial connector structure according to claim 5, characterized in that, The needle bar (31) and the transition plate (33) are integrally formed.

8. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, The outer conductor (1) is a columnar structure, and one end of it is provided with an outer diameter thread (6) that can be connected to the transmission cable.

9. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, The outer conductor (1) is made of oxygen-free copper, stainless steel, nickel, or molybdenum.

10. The interchangeable interface RF coaxial connector structure according to claim 1, characterized in that, The material of the pin (3) is stainless steel or nickel or Kovar alloy 4J29 or Kovar alloy 4J33 or oxygen-free copper or molybdenum or tungsten or tungsten copper.

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