WO2020233388A1

WO2020233388A1 - Radio-frequency coaxial connector

Info

Publication number: WO2020233388A1
Application number: PCT/CN2020/088298
Authority: WO
Inventors: 罗浩; 张震任; 梁帅; 张辉信; 徐可
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-05-23
Filing date: 2020-04-30
Publication date: 2020-11-26
Also published as: CN111987509A

Abstract

Provided in an embodiment of the present disclosure is a radio-frequency coaxial connector, comprising a first connector, a middle connector and a second connector, wherein the first connector sequentially comprises, from outside to inside, a first outer conductor, a first separator and a first inner conductor; the second connector sequentially comprises, from outside to inside, a second outer conductor, a second separator and a second inner conductor; and the middle connector sequentially comprises, from outside to inside, a middle outer conductor, a middle separator and a middle inner conductor.

Description

RF coaxial connector

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201910436632.5 on May 23, 2019. The entire content of the application is incorporated into this application by reference.

Technical field

The present disclosure relates to the field of communication, for example, to a radio frequency coaxial connector.

Background technique

The radio frequency connector is a kind of connector used in the radio frequency range. It can be connected and disconnected by the electric signal when it is installed on the cable or installed on the instrument. The radio frequency connector has small size, multi-function, low loss, Features such as high power. Multi-channel radio frequency connectors and their components have strong advantages in terms of construction convenience, reliability, economy, and aesthetics. Therefore, they are more and more recognized by the market and more widely used.

The radio frequency coaxial connector includes two sockets and an adapter, and two ends of the adapter are respectively connected to a socket. However, in the RF coaxial connector, because there is only one cross-sectional contact between the socket conductor and the adapter conductor when the adapter and the socket are connected, the contact area is small, so the power that the RF coaxial connector can carry is not High; At the same time, this will also lead to poor connection reliability between multiple components of the RF coaxial connector.

Summary of the invention

The radio frequency coaxial connector provided by the embodiment of the present disclosure solves the problems of unreliable connection between devices in the radio frequency coaxial connector and low loadable power.

The embodiment of the present disclosure provides a radio frequency coaxial connector, including a first connector, an intermediate connector, and a second connector; the first connector includes a first outer conductor, a first partition, and a first Inner conductor; the second connector includes a second outer conductor, a second separator, and a second inner conductor in order from the outside to the inside; the intermediate connector includes an intermediate outer conductor, an intermediate separator, and an intermediate inner conductor in order from the outside to the inside;

The intermediate connector is received between the first connector and the second connector. The two ends of the intermediate outer conductor are electrically connected to the first outer conductor and the second outer conductor; the two ends of the intermediate inner conductor are respectively connected to the first inner conductor. Form an electrical connection with the second inner conductor;

The end where the first inner conductor is connected to the middle inner conductor is the first connection end, and the end where the second inner conductor is connected to the middle inner conductor is the second connection end. The middle inner conductor includes a conductive shaft and a first connecting end respectively arranged at both ends of the conductive shaft. The contact terminal and the second contact terminal, the first connecting end is a hollow first female female insert, the first contact terminal is a first female male head with an internal split groove along the axial direction of the port, and the first female male head extends into the first An inner female connector forms an electrical connection between the middle inner conductor and the first inner conductor; the second connection end is a hollow second inner female connector, and the second contact terminal is the first port with an inner split groove along the axial direction. There are two inner male headers, the second inner male header extends into the second inner female plug to form an electrical connection between the middle inner conductor and the second inner conductor.

Description of the drawings

FIG. 1 is a schematic cross-sectional view of a coaxial connector assembly provided by an embodiment of the disclosure;

2 is a schematic structural diagram of the radio frequency coaxial connector provided in the first embodiment of the disclosure;

Fig. 3 is a schematic cross-sectional view of the radio frequency coaxial connector in Fig. 2 taken along A-A';

Fig. 4 is a partial enlarged schematic diagram of part A in Fig. 3;

Fig. 5 is an exploded schematic diagram of the radio frequency coaxial connector in Fig. 2.

Detailed ways

Hereinafter, the embodiments of the present disclosure will be described through the implementation manners in combination with the drawings.

Example one:

With the continuous development of wireless communication technology, the reduction in the size of communication equipment means that it can save space, reduce weight, and leave more room for other system designs. The complicated cable assembly connection is being simple, compact and reliable. Replaced by "on-board" RF coaxial connector connection. "Board-to-board" RF coaxial connectors are increasingly used in the interconnection of wireless system modules. For example, in smart antennas, 9 sets of N-type radio frequency connector cable assemblies are used, and the radio frequency coaxial connector can be connected to the three-sector ESC smart antenna through 3 sets of radio frequency cable assemblies, and even the original The connection mode that requires 27 sets of N-type RF connector cable assemblies is reduced to the connection mode of 6 sets of RF coaxial connectors; at the same time, the Time Division (TD) ultra-wideband smart antenna can be connected from the original 9 sets of cable assemblies. The method is reduced to 2 sets of RF coaxial connector connection. It can be seen that radio frequency coaxial connectors and components have strong advantages in terms of construction convenience, reliability, economy, and aesthetics. As a modular and serialized solution for two radio frequency ports of the TD antenna project, this series of products simplifies the operation process and is increasingly recognized by the market; more manufacturers have begun to use multi-channel connectors and their components.

The embodiment of the present disclosure discloses a radio frequency coaxial connector product. Please refer to FIG. 1. The coaxial connector assembly 100 includes: a first socket 101 with a first outer conductor 101a, a first inner conductor 101b, and A first insulator 101c arranged between the first outer conductor 101a and the first inner conductor 101b around the first inner conductor 101b; a second socket 102 having a second outer conductor 102a, a second inner conductor 102b, and a surrounding first Two inner conductors 102b are provided in the second insulator 102c between the second outer conductor 102a and the second inner conductor 102b; and an adapter 103 having an adapter outer conductor 103a, an adapter inner conductor 103b, and In the adapter insulator 103c between the adapter outer conductor 103a and the adapter inner conductor 103b, the adapter insulator 103c is arranged around the adapter inner conductor 103b in the length direction of the adapter inner conductor 103b and turns The connector insulator 103c has two ends facing the first insulator 101c and the second insulator 102c, respectively, wherein the free ends of the first inner conductor 101b and the second inner conductor 102b are inserted into the adapter inner conductor 103b to be connected to each other. The connector inner conductor 103b forms electrical contact, and both ends of the adapter outer conductor 103a are inserted into the first outer conductor 101a and the second outer conductor 102a to form electrical contact with the first outer conductor 101a and the second outer conductor 102a, respectively , And wherein: both ends of the adapter insulator 103c are formed with tapered recesses that increase in size toward the end; the sides of the first insulator 101c and the second insulator 102c facing the adapter insulator 103c are both formed as A tapered protrusion that tapers toward the adapter 103 and is adapted to fit into the tapered recess.

The above-mentioned coaxial connector assembly 100 has the following disadvantages: the connection between the two ends of the adapter 103 and the first socket 101 and the second socket 102 only relies on the tapered recesses formed by the two ends of the adapter insulator 103c and The interaction of the tapered protrusions on the first insulator 101c and the second insulator 102c causes the first inner conductor 101b and the second inner conductor 102b to form an electrical connection with the adapter inner conductor 103b. In this connection mode, the first The inner conductor 101b, the second inner conductor 102b, and the adapter inner conductor 103b are not tightly connected and unreliable; at the same time, because the amount of contact is small, the upper limit of the power that the coaxial connector assembly 100 can carry is relatively low.

In view of the foregoing problems, this embodiment provides a radio frequency coaxial connector in conjunction with FIGS. 2-5. Please refer to the schematic diagram of a structure of the radio frequency coaxial connector shown in FIG. 2. The radio frequency coaxial connector 200 includes a first connector 1, an intermediate connector 2 and a second connector 3. Among them, the intermediate connector 2 is arranged between the first connector 1 and the second connector 3, and is arranged to receive the first connector 1 and the second connector 3 to realize the connection between the first connector 1 and the second connector 3. Physical and electrical connection between. In this embodiment, the first connector 1, the intermediate connector 2 and the second connector 3 each include an inner conductor and an outer conductor, and, between the inner conductor and the outer conductor, it also includes an inner conductor and an outer conductor. Dividers of conductors.

For example, please refer to FIG. 3, which shows a schematic cross-sectional view obtained by cutting the radio frequency coaxial connector 200 along the line A-A' in FIG.

The first connector 1 includes a first outer conductor 11, a first partition 12, and a first inner conductor 13 in order from the outside to the inside; the second connector 3 includes a second outer conductor 31 and a second partition in order from the outside to the inside. 32 and a second inner conductor 33; the intermediate connector 2 includes an intermediate outer conductor 21, an intermediate partition 22, and an intermediate inner conductor 23 in order from the outside to the inside.

The intermediate connector 2 is received between the first connector 1 and the second connector 3. The two ends of the intermediate outer conductor 21 are electrically connected to the first outer conductor 11 and the second outer conductor 31; The ends are electrically connected to the first inner conductor 13 and the second inner conductor 33 respectively. The connection of the inner conductors among the first connector 1, the second connector 3 and the intermediate connector 2 will be described below in conjunction with FIG. 3.

The middle inner conductor 23 includes a conductive shaft 231 and contact terminals 232 respectively provided at both ends of the conductive shaft 231. The contact terminal 232 is used to connect with the first inner conductor 13 and the second inner conductor 33. Here, the contact terminal mated with the first inner conductor 13 is called the first contact terminal 232a, which will be mated with the second inner conductor 33. The terminal is called a second contact terminal 232b.

In this embodiment, the end connecting the first inner conductor 13 and the intermediate inner conductor 23 is called the "first connecting end", and the end connecting the second inner conductor 33 and the intermediate inner conductor 23 is called the "second connecting end". ". One of the first connecting end and the first contact terminal 232a serves as a first female male connector, and the other is a hollow first female female connector. In one embodiment, the first inner male connector can be inserted into the first inner female connector and cooperate with the first inner female connector to realize the electrical connection between the middle inner conductor 23 and the first inner conductor 13. Because the port of the first inner male head in this embodiment is provided with an inner split groove along the axial direction, the first inner male head has a certain degree of expansion and contraction. In other words, the first inner male head is actually an elastic component . Therefore, when the first female male connector is inserted into the first female female connector, because the end of the first female male connector tends to expand outward, the first female male connector can be connected to the first female female connector. The tight coupling, thereby forming an interference fit, ensures the reliability of the physical and electrical connection between the first inner conductor 13 and the intermediate inner conductor 23.

The connection and cooperation between the second inner conductor 33 and the intermediate inner conductor 23 is similar, and one of the second connection end and the second contact terminal 232b on the second inner conductor 33 is used as a second inner male connector, and the other is Hollow second female insert. In an embodiment, the second inner male connector can be inserted into the second inner female connector and cooperate with the second inner female connector to realize the electrical connection between the middle inner conductor 23 and the second inner conductor 33. Because the port of the second inner male head in this embodiment is provided with an inner split groove along the axial direction, the second inner male head has a certain degree of expansion and contraction, and the second inner male head is actually an elastic component. Therefore, when the second female male connector is inserted into the second female female connector, the end of the second female male connector tends to expand outward. Therefore, the second female male connector can be connected to the second female female connector. The tight coupling, thereby forming an interference fit, ensures the reliability of the physical and electrical connection between the second inner conductor 33 and the intermediate inner conductor 23.

In this embodiment, "hollow" does not require that the interiors of the first connection end, the first contact terminal 232a, the second connection end, and the second contact terminal 232b must be empty and there must be no other substances other than air. Taking the hollow first contact terminal 232a as an example for description, it is only explained that the first contact terminal 232a is not a solid structure made of one material. For example, the hollow first contact terminal 232a may also be filled with insulating material.

In some examples of this embodiment, the first inner conductor 13 may be used as the first female male plug, and the first contact terminal 232a may be used as the first female female plug. In some other examples of this embodiment, the first inner conductor 13 serves as a first female female plug, and the first contact terminal 232a serves as a first female male plug. Correspondingly, the second inner conductor 33 is similar to the second contact terminal 232b. In some examples, the second inner conductor 33 serves as the second inner male connector and the second contact terminal 232b serves as the second female connector. In some other examples of this embodiment, the second contact terminal 232b can be used as the second inner male connector, and the second inner conductor 33 can be used as the second female connector.

In order to increase the closeness of the contact between the intermediate inner conductor 23 and the first inner conductor 13 and the second inner conductor 33, in some examples of this embodiment, the first inner male connector and the second inner male connector The outer wall of the head is provided with a convex guide block. In this way, the position where the guide block is provided on the first inner male head and the second inner male head will have a larger diameter than other positions. In this case, the first inner male After the male plug is inserted into the first female plug, the pressing action between the first female plug and the first female plug is stronger, and the contact is naturally tighter and firmer. After the second female male connector is inserted into the second female female connector, the second female male connector will have a large expansion tendency, so it can ensure that the second inner conductor and the intermediate inner conductor maintain good contact.

In the radio frequency coaxial connector 200 shown in FIG. 2, the first contact terminal 232a and the second contact terminal 232b respectively serve as the first female male connector and the second female male connector. Therefore, the first contact terminal 232a and the second female connector The two contact terminals 232b respectively extend into the first inner conductor 13 and the second inner conductor 33 when they are matched with the first inner conductor 13 and the second inner conductor 33 respectively. Please refer to FIG. 4, which shows a partial enlarged schematic diagram of part A in FIG. 3. At the end of the first contact terminal 232a, an inner split groove 233 is opened along the axial direction. In one embodiment, there may be more than one inner split groove opened on a contact terminal.

In an embodiment, when the first contact terminal 232a and the second contact terminal 232b are respectively used as the first female male header and the second female male header, the guide block is also provided on the first contact terminal 232a and the second contact terminal 232a. 232b on the outer wall. A guide block 234 protruding outward is provided on the outer periphery of the first contact terminal 232a near the end, and the arrangement of the guide block 234 causes the diameter of the first contact terminal 232a to increase. In some examples of this embodiment, the side of the guide block 234 facing away from the conductive shaft is provided with a chamfer. Due to the oblique direction of the chamfer, when inserting the middle inner conductor 23 into the first inner conductor 13, the chamfer It is possible to better guide the first contact terminal 232a to enter the first connection end of the first inner conductor 13. The arrangement of the second contact terminal 232b is also similar, which will not be repeated here.

In some examples of this embodiment, the diameter of the first inner male head closer to the end of the first inner male head is larger, and the diameter of the second inner male head closer to the end of the second inner male head is larger. The description is continued by taking the first contact terminal 232a as the first female male header as an example. The diameter of the first inner male head closer to the end of the first inner male head is larger, that is, the diameter of the first contact terminal 232a becomes smaller and smaller as it gets closer to the conductive shaft 231, so it is far away from the conductive shaft. The diameter of one end of the 231 is larger than the diameter of the first contact terminal 232a near the end of the conductive shaft 231. Therefore, when the contact terminal matches the first inner conductor 13 and the second inner conductor 33, the radial tolerance is relatively high, the multi-structure installation and matching stability are better, the loadable power is higher, and the product performance is better.

In some examples of this embodiment, the diameter of the two contact terminals is smaller than the diameter of the conductive shaft 231, that is, the contact terminal is thinner than the conductive shaft 231, so a shoulder is formed between the conductive shaft and the contact terminal, as shown in Figure 4 As shown, in this embodiment, the shoulder between the conductive shaft 231 and the first contact terminal 232a is the first shoulder 235, and the shoulder between the conductive shaft and the second contact terminal 232b is the second shoulder (Figure Not shown in).

In the radio frequency coaxial connector 200 shown in FIGS. 2-4, after the first contact terminal 232a is connected to the first inner conductor 13, there is a margin slot 236 between the first inner conductor 13 and the first shoulder 235 , That is, there is a certain distance between the first shoulder 235 and the first inner conductor 13, and this distance allows the conductive shaft 231 to perform adaptive adjustment of the adaptive position when the conductive shaft 231 swings, that is, it is satisfied with the conductive shaft 231 when the conductive shaft 231 swings. Stability requirements. Correspondingly, there is also a margin groove between the second shoulder and the second inner conductor 33.

In the radio frequency coaxial connector provided by this embodiment, an inner split groove is opened on the contact terminal of the middle inner conductor, so that the end of the middle inner conductor is set as a retractable elastic part, so that the contact terminals are in the same position. When the first inner conductor and the second inner conductor are matched, they can be more closely combined, increasing the stability and reliability of the electrical connection of the radio frequency coaxial connector; at the same time, it can also increase the power that the radio frequency coaxial connector can carry.

In this embodiment, since the first internal male head and the second internal male head are provided with internal splitting grooves, the first internal male head and the second internal male head have a certain degree of expansion and contraction, that is, elasticity. Therefore, when When the first female male head extends into the first female female connector, the first female male male head can be brought into close contact with the first female female connector due to the outward expansion force of the first female male male connector, which increases the first connection The stability of the electrical connection between the connector and the intermediate connector; when the second female male head extends into the second female female connector, the outward expansion force of the second female male connector can make the second female male connector and The second female connector is in close contact, which increases the stability of the electrical connection between the second connector and the intermediate connector. At the same time, because of the close and reliable connection between the first inner conductor, the middle inner conductor and the second inner conductor, the power that the radio frequency coaxial connector can carry is increased, and the product performance is enhanced.

Embodiment two:

This embodiment continues to describe the connection between the outer conductors of the first connector 1, the intermediate connector 2, and the second connector 3 in conjunction with FIGS. 2-4.

In an embodiment, the connection between the first outer conductor 11 and the middle outer conductor 21, and the second outer conductor 31 and the middle outer conductor 21 may also be made by male and female plugs. In order to distinguish between the male and female plugs between the inner conductors, in this embodiment, the male plug formed between the outer conductors is called "outer male plug" and the female plug is called "outer female plug". In an example of this embodiment, the first end of the middle outer conductor 21 is a hollow structure, one of the first end of the middle outer conductor 21 and the first contact terminal 232a is a first outer male connector, and the other Who is the first external female plug. The first outer male head extends into the first outer female plug to form an electrical connection between the middle outer conductor and the first outer conductor. Similarly, one of the second end of the middle outer conductor 21 and the second outer conductor 31 is a second outer male plug, the other is a hollow second outer female plug, and the second outer male plug extends into the second outer female Inserted to form an electrical connection between the middle outer conductor and the second outer conductor.

Similarly, the “hollowness” of the outer conductor does not require that the first end, the second end, the first outer conductor 11 or the second outer conductor 31 of the middle outer conductor 21 must not contain substances other than air, but it indicates that the middle The first end, the second end, the first outer conductor 11 or the second outer conductor 31 of the outer conductor 21 are not solid structures composed of the same material. It can be clearly seen from the figure that the first outer conductor 11 also includes a first spacer 12, and the first inner conductor 13 and the middle outer conductor 21 also include a middle spacer 22 and a middle inner conductor 23. The second outer conductor 31 further includes a second partition 32 and a second inner conductor 33.

In some examples of this embodiment, the first outer conductor 11 may be used as the first male plug, and the first end of the middle outer conductor 21 may be used as the first female plug. In other examples of this embodiment, the first outer conductor 11 may be used as the first outer female plug, and the first end of the middle outer conductor 21 may be used as the first outer male plug. Correspondingly, the second outer conductor 31 and the middle outer conductor 21 are similar. In some examples, the second outer conductor 31 is used as the second outer male connector, and the second end of the middle outer conductor 21 is used as the second outer female plug. In other examples of this embodiment, the middle outer conductor 21 may be The second end of the connector is used as a second male connector, and the second outer conductor 31 is used as a second female connector.

In the radio frequency coaxial connector 200 shown in FIGS. 2-4, the outer conductor on the intermediate connector 2 is still used as the male connector. The first end of the intermediate outer conductor 21 is the first male connector, and the second end is For the second outer male head, at least one outer splitting groove 214 is opened along the axial direction at the ends of the first and second outer male heads respectively, so that the middle outer conductor 21 has the ability to expand and contract, and the outer splitting groove is the middle outer conductor 21 A sufficient amount of space for contraction, expansion and deformation is provided. Through the elastic deformation effect of the middle outer conductor 21, the stability of the electrical connection after the middle outer conductor 21 is connected to the first outer conductor 11 and the second outer conductor 31 can be improved.

In some examples of this embodiment, at least one convex ring 213 protruding outward is provided on the outer wall at both ends of the middle outer conductor 21. The function of the convex ring 213 at the end of the middle outer conductor 21 is somewhat similar to that of the middle inner conductor 23. The role of the upper guide block 234. The convex loops provided at both ends of the middle outer conductor 21 can improve the contact tightness when the middle outer conductor 21 is matched with the first outer conductor 11 and the second outer conductor 31, thereby increasing the electrical connection stability.

In an example of this embodiment, in order to ensure the stability of the assembly between the second connector 3 and the intermediate connector 2, at least one second end of the second outer conductor 31 is also provided on the inner wall of the second outer conductor 31 When the second outer conductor 31 and the middle outer conductor 21 are mated, the fixed ring 311 is closer to the first end of the middle outer conductor 21 than the convex ring 213.

In one embodiment, the fixing ring 311 provided on the inner wall of the second outer conductor 31 is equivalent to a positioning and clamping structure, that is, when the middle outer conductor 21 is inserted into the second outer conductor 31, the second connector 3 is taken as the reference object, and the convex The ring 213 will straddle the fixed ring 311 to form a non-return structure to prevent the middle outer conductor 21 from sliding out of the second outer conductor 31 and prevent the two from separating.

In some examples of this embodiment, the inner walls of the first outer conductor 11 and the second outer conductor 31 are both provided with inner retaining rings; in the state where the first connector 1, the intermediate connector 2 and the second connector 3 are assembled , The two ends of the middle outer conductor 21 respectively collide with the inner retaining ring on the first outer conductor 11 and the inner retaining ring on the second outer conductor 31. Referring to FIG. 3, in the radio frequency coaxial connector 200 shown in FIG. 3, the inner retaining ring 312 can abut the middle outer conductor 21 to prevent the middle outer conductor 21 from extending into the second connector 3.

In one embodiment, the spacer in the radio frequency coaxial connector should be made of insulating material, so that the electrical connection between the inner conductors in the radio frequency coaxial connector and the electrical connection between the outer conductors can be independent. In some examples of this embodiment, the partition may adopt a non-rigid structure, so that the partition has good deformability. Through the deformation of the partition, the smoothness of the assembly of multiple structures and the structural stability after assembly can be improved. Sex.

When the radio frequency coaxial connector in this embodiment connects the outer conductors of the three components of the first connector, the intermediate connector and the second connector, the outer conductors may also be provided at both ends of the intermediate outer conductor. The split slot utilizes the expandability of the outer split slot to make the connection between the first outer conductor, the middle outer conductor and the second outer conductor more stable and reliable.

Example three:

The arrangement of the intermediate partition 22 and the intermediate outer conductor 21 in the intermediate connector 2 and the cooperation between the intermediate partition 22 and the intermediate inner conductor 23 and the intermediate outer conductor 21 will be described below.

In some examples of this embodiment, the middle portion of the conductive shaft 231 is provided with a ring groove 2311 along its outer peripheral surface, and the ring groove 2311 is a groove recessed inward on the surface of the conductive shaft 231. When the middle partition 22 is matched with the conductive shaft 231, the middle partition 22 can be fitted into the ring groove 2311, so as to prevent the middle partition 22 from sliding displacement relative to the conductive shaft 231. In some examples of this embodiment, both sides of the ring groove 2311 further include two introduction surfaces 2312 for the middle partition 22 to interfere with. Optionally, the introduction surfaces 2312 may be inclined surfaces or arc surfaces.

Through this arrangement, when the middle partition 22 is matched with the conductive shaft 231, the conductive shaft 231 is gradually inserted into the middle partition 22 from one side, and the middle partition 22 can use the deformability of its structure to be able to be inserted when the conductive shaft 231 is inserted. When the intermediate partition 22 is at the midpoint of the conductive shaft 231 relative to the conductive shaft 231, the positioning installation is completed. In addition, after the conductive shaft 231 is inserted into the middle partition 22, since the middle partition 22 abuts on the introduction surface 2312, and the introduction surface 2312 is inclined and curved, there is actually a space between the middle partition 22 and the conductive shaft 231. The air remaining in the space expands under the heating state and escapes from the contact point between the introduction surface 2312 and the intermediate partition 22, so that the intermediate partition 22 is more closely fitted on the conductive shaft 231, and the structure is more stable. Well, the amount of axial movement of the conductive shaft 231 is reduced.

In some examples of this embodiment, the outer peripheral surface of the middle partition 22 is provided with a groove 221, the inner side of the middle outer conductor 21 is provided with a positioning convex ring 211 opposite to the position of the groove 221, and the middle outer conductor 21 and the middle When the spacer 22 is mated, the positioning convex ring 211 can be embedded in the groove 221. Based on this solution, the groove 221 of the middle partition 22 provides the functions of installation and positioning. During assembly, the middle partition 22 is pushed into the middle outer conductor 21 set. During the pushing process, the middle divider 22 gradually penetrates into the middle outer conductor 21 set. At the same time, due to the non-rigid structure of the middle partition 22, it has a good Deformability, through which the fluency of multi-structure assembly and the structural stability after assembly are improved.

In some examples of this embodiment, the outer peripheral surface of the middle part of the middle outer conductor 21 is provided with an outer convex ring 212, the outer convex ring 212 is convex outwards, the connection structure strength of the middle outer conductor 21 can be increased by the outer convex ring 212 Secondly, the thickness of the middle part of the middle outer conductor 21 is increased, and the stability after mating with the first outer conductor 11 and the second outer conductor 31 is higher, and the influence of the expansion and contraction of the middle partition 22 on the middle outer conductor 21 is reduced.

The radio frequency coaxial connector provided in this embodiment, on the basis of the first and second embodiments, not only uses the good expansion and contractibility of the contact terminal to improve the connection stability of the overall structure, and improves the matching power, but also because The outer convex ring is provided, therefore, the stability of the coordination between the outer conductors is improved.

In addition, in the radio frequency coaxial connector of this embodiment, because the diameter of the conductive shaft of the middle inner conductor is larger than that of the inner conductor in the related art, the load-bearing capacity of the conductive shaft of the middle inner conductor is improved, that is, it can be improved. Matching power.

Embodiment four:

In this embodiment, on the basis of FIGS. 2-4, the foregoing radio frequency coaxial connector is described in conjunction with FIG. 5. FIG. 5 shows an exploded view of the radio frequency coaxial connector in FIG.

2, a radio frequency coaxial connector provided in this embodiment includes a first connector 1, an intermediate connector 2 and a second connector 3.

3, the intermediate connector 2 includes an intermediate outer conductor 21, an intermediate partition 22, and an intermediate inner conductor 23 from the outside to the inside; the first connector 1 includes a first outer conductor 11, a first partition 12, and The first inner conductor 13; the second connector 3 includes a second outer conductor 31, a second partition 32 and a second inner conductor 33 from the outside to the inside.

As shown in Figures 3 and 4, the middle inner conductor 23 includes a conductive shaft 231, and both ends of the conductive shaft 231 are connected to contact terminals (the contact terminals include a first contact terminal 232a and a second contact terminal 232b. The subsequent introduction takes the first contact terminal 232a as For example, the arrangement of the second contact terminal 232b is similar to the arrangement of the first contact terminal 232a). The first contact terminal 232a has a hollow structure, and the port of the first contact terminal 232a is provided with an inner split groove 233 along the axial direction. The inner split groove 233 makes the port cross section of the first contact terminal 232a a structure of multiple arcs. A contact terminal 232a has a certain degree of expansion and expansion and elasticity, and the first contact terminal 232a can be connected and matched with the first inner conductor 13 more stably. At the same time, the outer wall of the end of the first contact terminal 232a is provided with a guide block 234, and a chamfer is provided on the side of the guide block 234 facing away from the conductive shaft 231. The chamfering of the guide block 234 and the guide block 234 makes the first The contact terminal 232a has a larger range of retracting and expanding actions during insertion, and the contact force of the first contact terminal 232a is increased by the reaction force, and the connection stability of the overall structure is improved.

4, a first shoulder 235 is formed between the conductive shaft 231 and the first contact terminal 232a. The diameter of the conductive shaft 231 is larger than the outer diameter of the first contact terminal 232a, because the conductive shaft 231 has a relatively thick diameter structure. Therefore, the bearing capacity is higher and the safety is better; and when the first contact terminal 232a is inserted into the first inner conductor 13, there is still a margin groove 236 between the first shoulder 235 and the first inner conductor 13, The first contact terminal 232a can swing through the space left by the margin groove 236.

Regarding the assembly structure, referring to Figures 3 and 5, the middle of the conductive shaft 231 is provided with a ring groove 2311 along the outer peripheral surface of the conductive shaft 231. When the middle partition 22 is matched with the conductive shaft 231, the middle partition 22 can be inserted into the ring groove 2311 At the same time, both sides of the ring groove 2311 include two lead-in surfaces 2312, the lead-in surfaces 2312 are inclined surfaces or arc surfaces, and the lead-in surfaces 2312 are for the middle partition 22 to interfere. Due to the presence of the introduction surface 2312, there is actually a space between the intermediate partition 22 and the conductive shaft 231. The air in the space expands under the heating state and escapes from the contact point between the introduction surface 2312 and the intermediate partition 22 As a result, the intermediate partition 22 will be pressed inwardly so as to be more tightly fitted on the conductive shaft 231, the structure is more stable, and the axial movement of the conductive shaft 231 is reduced. The outer peripheral surface of the middle partition 22 is provided with a groove 221, and the middle inner wall of the middle outer conductor 21 is provided with a positioning convex ring 211, and the positioning convex ring 211 can be embedded in the groove 221. The coordination of the two structures is stable, realizing the effect of rapid positioning and installation. In order to adapt to the installation of the above structure, the intermediate partition 22 adopts an insulating plastic structure.

Please continue to combine FIG. 3, the middle outer peripheral surface of the middle outer conductor 21 is provided with an outer convex ring 212. The outer convex ring 212 can increase the strength of the connection structure of the middle outer conductor 21. Secondly, the middle thickness of the middle outer conductor 21 increases. The stability of the mating of the outer conductor 11 and the second outer conductor 31 is relatively high, and the expansion and contraction of the middle partition 22 has a small influence on the outer conductor assembly.

The outer edges of the two ends of the middle outer conductor 21 are provided with convex rings 213 protruding outward, and the ends of the middle outer conductor 21 are provided with outer split grooves 214 along the axial direction, that is, the outer split grooves 214 are also present in the convex rings 213. on. First, the convex ring 213 increases the outer diameter of the middle outer conductor 21, and the reaction force after the middle outer conductor 21 is squeezed can increase the tightness of the middle outer conductor 21 and the front and rear fittings, and the middle outer conductor 21 passes through the outer split The groove 214 has a certain amount of expansion and contraction range, which is adapted to the deformation of the connection and cooperation, and improves the stability of the electrical connection.

In addition, in this embodiment, the inner wall of the second outer conductor 31 is provided with at least one fixed ring 311 that is staggered and clamped with the convex ring 213. The fixing ring 311 provided on the inner wall of the second outer conductor 31 is equivalent to a positioning and clamping structure, that is, when the middle outer conductor 21 is inserted into the second outer conductor 31, with the second connector 3 as the reference object, the convex ring 213 crosses the fixing ring 311 forms a non-return structure to realize the assembly stability of the middle outer conductor 21 and the second outer conductor 31. After assembling, the intermediate connector 2 and the second connector 3 are connected and fixed as a male connector, and the first connector 1 is a female connector.

In order to limit the depth that the intermediate connector 2 is inserted into the first connector 1 and the second connector 3 back and forth, as shown in Fig. 3, the inner walls of the first outer conductor 11 and the second outer conductor 31 are provided with inner retaining rings (including the second outer conductor 31). The inner retaining ring 312), the inner retaining ring is equivalent to the structure for the limit of the intermediate connector 2 and the stable installation and cooperation; when the first connector 1, the intermediate connector 2 and the second connector 3 are assembled, the middle outer The conductor 21 conflicts with the inner retaining ring, that is, the position is limited, the assembly structure is stable, and the relative axial swing of the intermediate connector 2 relative to the first connector 1 and the second connector 3 can be reduced, and the structural stability can be improved.

During the assembly process, first insert the middle inner conductor 23 into the middle partition 22 and position it as the first whole, then insert the first whole into the middle outer conductor 21 and position it as the second whole, and then put the second whole A whole is inserted into the second outer conductor 31 in the second connector 3 and positioned as the third whole. The third whole can be used as a male plug and can be screwed to a cable. The first connector 1 is used as a female plug for male Head fit.

In one embodiment, although the mating structure of the intermediate connector and the first connector is partly the same as the mating structure of the intermediate connector and the second connector, that is, part of the connecting structure can be connected and mated on both sides However, although it can be set symmetrically, it is not required to be set symmetrically. For example, an outer splitting groove is provided on the first end of the middle outer conductor. Correspondingly, an outer splitting groove may also be provided on the second end of the middle outer conductor. However, in some examples, the middle outer conductor and the second outer conductor The fit between may not need to pass through the outer splitting groove. Therefore, although the outer splitting groove may be provided on the second end of the middle outer conductor, it may be selected not to be provided in these examples.

Claims

A radio frequency coaxial connector, including a first connector, an intermediate connector, and a second connector; the first connector includes a first outer conductor, a first partition, and a first inner conductor in order from outside to inside; The second connector includes a second outer conductor, a second spacer, and a second inner conductor in order from the outside to the inside; the intermediate connector includes a middle outer conductor, a middle spacer, and a middle inner conductor in order from the outside to the inside;

The intermediate connector is received between the first connector and the second connector, and two ends of the intermediate outer conductor are respectively electrically connected to the first outer conductor and the second outer conductor; Both ends of the middle inner conductor are respectively electrically connected to the first inner conductor and the second inner conductor;

The end of the first inner conductor connected with the intermediate inner conductor is a first connecting end, the end of the second inner conductor connected with the intermediate inner conductor is a second connecting end, and the intermediate inner conductor includes a conductive shaft And a first contact terminal and a second contact terminal respectively provided at both ends of the conductive shaft, the first connecting end is a hollow first female insert, and the first contact terminal is a port with an inner split along the axial direction. The first inner male end of the slot, the first inner male end extends into the first inner female plug to form an electrical connection between the intermediate inner conductor and the first inner conductor; the second connection The end is a hollow second female socket, the second contact terminal is a second female male head with an internal split groove along the axial direction of the port, and the second female male head extends into the second female socket , Forming an electrical connection between the intermediate inner conductor and the second inner conductor.
The radio frequency coaxial connector of claim 1, wherein the diameter of the first contact terminal and the diameter of the second contact terminal are both smaller than the diameter of the conductive shaft, and the conductive shaft and the first A first shoulder is formed between the contact terminals, and a second shoulder is formed between the conductive shaft and the second contact terminal.
The radio frequency coaxial connector according to claim 2, wherein a margin slot is left between the first shoulder and the first inner conductor, and between the second shoulder and the second inner conductor .
The radio frequency coaxial connector according to claim 1, wherein the outer wall of the end of the first contact terminal and the second contact terminal is provided with a guide block, and the guide block faces a side surface of the conductive shaft With chamfer.
The radio frequency coaxial connector according to claim 1, wherein the central part of the conductive shaft is provided with a ring groove along the outer peripheral surface of the conductive shaft, and when the intermediate partition is matched with the conductive shaft, the The intermediate partition is fitted in the ring groove.
The radio frequency coaxial connector according to claim 5, wherein the two sides of the ring groove include two lead-in surfaces for the middle partition to interfere, and the lead-in surfaces are inclined surfaces or arc surfaces.
The radio frequency coaxial connector according to claim 1, wherein the outer peripheral surface of the intermediate partition is provided with a groove, and the inner side of the intermediate outer conductor is provided with a positioning convex ring opposite to the position of the groove. When the middle outer conductor is matched with the middle partition, the positioning convex ring can be embedded in the groove.
The radio frequency coaxial connector according to claim 1, wherein a convex outer convex ring is provided on the outer peripheral surface of the middle part of the middle outer conductor.
The radio frequency coaxial connector according to claim 1, wherein the diameter of the end portion of the first inner male head closer to the first inner male head is larger, and the closer the second inner male head is to the The diameter at the end of the second inner male head is larger.
The radio frequency coaxial connector according to any one of claims 1-9, wherein the first end of the middle outer conductor is a first outer male connector, and the second end of the middle outer conductor is a second outer male connector , The first outer conductor is a first female plug that matches with the first male plug, the second outer conductor is a second female plug that matches with the second male plug, and the second male The head extends into the second outer female insert to form an electrical connection between the middle outer conductor and the second outer conductor.
10. The radio frequency coaxial connector according to claim 10, wherein the port of the first end of the middle outer conductor and the port of the second end of the middle outer conductor are both provided with outer split grooves along the axial direction.
The radio frequency coaxial connector of claim 11, wherein the outer walls of the first end of the middle outer conductor and the second end of the middle outer conductor are respectively provided with at least one convex ring protruding outward.
The radio frequency coaxial connector according to claim 12, wherein the inner wall of the second outer conductor is provided with at least one fixing ring that is offset from the position of the convex ring on the second end of the middle outer conductor; When the second outer conductor is matched with the middle outer conductor, the fixed ring is close to the first end of the middle outer conductor relative to the convex ring.
The radio frequency coaxial connector according to claim 10, wherein the inner walls of the first outer conductor and the second outer conductor are both provided with inner retaining rings; in the first connector, the intermediate connector and In a state where the second connector is assembled, both ends of the middle outer conductor respectively abut the inner retaining ring on the first outer conductor and the inner retaining ring on the second outer conductor.