Miniature radio frequency connector

By designing the outer conductor of the miniature RF connector as a split structure, using a semi-cylindrical unit surrounded and soldered to the pins, the stress concentration problem is solved, the service life is extended and the integrity is maintained, and the defects of the traditional structure are improved.

CN122292012APending Publication Date: 2026-06-26ELECTRIC CONNECTOR TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC CONNECTOR TECH
Filing Date
2024-12-25
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The outer conductor structure of existing miniature RF connectors is prone to stress concentration, which leads to material damage and shortened service life. In addition, the large number of solder pads exacerbates stress concentration.

Method used

The outer conductor is designed as a split structure, using two semi-cylindrical units to form a cylindrical part, which are connected by the ends of the solder feet to reduce the number of solder feet, increase the range of motion and avoid stress concentration.

Benefits of technology

It reduces stress concentration, extends the service life of the connector, and maintains the integrity of the outer conductor through solder joints, preventing loosening and improving the drawbacks of traditional one-piece cylindrical parts.

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Abstract

This application discloses a miniature radio frequency connector, including an outer conductor, a center terminal, and an insulating base. Both the outer conductor and the center terminal are disposed on the insulating base, with the outer conductor surrounding the center terminal. The outer conductor includes two semi-cylindrical units, each comprising a semi-cylindrical portion and a solder pin at the bottom end of the semi-cylindrical portion. The two semi-cylindrical portions together form a cylindrical portion for insertion into a mating connector. A limiting groove is provided on the insulating base, and the cylindrical portion is disposed within the limiting groove. The ends of the solder pins extend laterally, and the ends of the two solder pins are connected. The outer conductor of this miniature radio frequency connector has a split structure, with the cylindrical portion formed by the two semi-cylindrical portions. When the connector is engaged, the outer conductor can open outwards, increasing its range of motion and reducing stress concentration. Furthermore, the miniature radio frequency connector of this application has a smaller number of solder pins, further reducing stress concentration at the solder pins and preventing material damage.
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Description

Technical Field

[0001] This application relates to the field of connector technology, and more particularly to a miniature radio frequency connector. Background Technology

[0002] Miniature RF connectors are also known as USS RF connectors. Miniature RF connectors include wire-end connectors and board-end connectors, which are mated together to achieve signal transmission. Both wire-end and board-end connectors have cylindrical outer conductors, which interlock to achieve connection.

[0003] Existing miniature RF connectors with wire-end connectors 10′ such as Figure 1 As shown, Figure 2 This is a schematic diagram of the outer conductor structure of the 10' wire-end connector in the prior art. (Combined with...) Figure 1 and Figure 2 The existing miniature RF connector 10' has an outer conductor 100' that is a one-piece cylindrical structure with three solder pins (112a', 112b', 112c'). To ensure the integrity of the outer conductor 100' structure for a secure assembly with the insulator 300', the existing technology can only make the outer conductor 100' as follows: Figure 2 The integrated structure shown. Figure 2 As shown, the middle solder foot 112b′ is the connection point between the outer conductor 100′ and the outer material strip. After assembly, the connection point between solder foot 112b′ and the material strip is cut off to form solder foot 112b′.

[0004] like Figure 1 The outer conductor 100′ structure shown has a single-piece cylindrical portion 111′, resulting in stress concentration during insertion. Furthermore, the numerous solder pads (112a′, 112b′, 112c′) easily lead to stress concentration at these pads. Therefore, the outer conductor 100′ material may fail even under low loads, thus shortening the connector's lifespan. Summary of the Invention

[0005] The purpose of this application is to provide a miniature radio frequency connector to overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A miniature radio frequency connector includes an outer conductor, a center terminal, and an insulating base; both the outer conductor and the center terminal are disposed on the insulating base, and the outer conductor surrounds the center terminal.

[0008] The outer conductor includes two semi-cylindrical units, each of which includes a semi-cylindrical portion and a solder foot located at the bottom of the semi-cylindrical portion. The two semi-cylindrical portions are joined to form a cylindrical portion for insertion into a mating connector. The insulating base is provided with a limiting groove, and the cylindrical portion is located in the limiting groove. The end of the solder foot extends laterally, and the ends of the two solder feet are connected.

[0009] In some embodiments, the first direction is defined as a direction parallel to the tangential direction of the cylindrical portion; the two ends of the weld leg along the first direction are the first end and the second end, respectively;

[0010] The first end extends beyond the diameter range of the cylindrical portion along the first direction, and the first ends of the two welding feet are connected.

[0011] In some embodiments, the solder foot includes a connecting portion and a plate-like portion;

[0012] The connecting portion extends from the bottom end of the semi-cylindrical portion toward the cylindrical portion in a direction axially away from the cylindrical portion and toward the outside of the cylindrical portion, and the plate-shaped portion extends from the connecting portion along the first direction;

[0013] The insulating seat is sandwiched between the bottom end of the semi-cylindrical portion and the top end of the plate-shaped portion.

[0014] In some embodiments, the first ends of the two plate-shaped portions are connected.

[0015] In some embodiments, the first ends of the two plate-shaped portions are connected by a connecting rod.

[0016] In some embodiments, the top of the insulating base is provided with a limiting step surface for limiting the connecting rod, and the connecting rod abuts against the limiting step surface.

[0017] In some embodiments, the connecting rod arches upward relative to the plate-shaped portion, and the bottom of the connecting rod and the side wall of the connecting rod near the cylindrical portion abut against the insulating seat.

[0018] In some embodiments, the inner side of the plate-shaped portion is provided with an upwardly folded flange, and the side wall of the insulating seat is provided with a boss that extends outward from the insulating seat. The top of the flange abuts against the bottom of the boss to clamp the insulating seat.

[0019] In some embodiments, a gap exists between the two semi-cylindrical portions.

[0020] In some embodiments, the center terminal includes a contact portion and a terminal foot, the contact portion being disposed at the center of the cylindrical portion, and the terminal foot extending from the second end of the two solder feet out of the insulating seat.

[0021] The advantages of this application are: It innovatively designs the outer conductor of the miniature RF connector as a split structure, comprising two semi-cylindrical units that enclose the cylindrical portion of the outer conductor. When the connector is engaged, the outer conductor can expand outwards, increasing its range of motion, thereby reducing stress concentration, preventing material damage, and extending the connector's lifespan. Furthermore, this application's miniature RF connector has fewer solder pins; each semi-cylindrical unit has only one solder pin, for a total of two. Compared to traditional three-pin outer conductors, this reduces the number of solder pins, thus reducing stress concentration at the solder pins.

[0022] Traditionally, the outer conductor can only be made as a single unit, with the cylindrical section being a closed tube. The integrity of the entire outer conductor is maintained by this single, closed cylindrical section, making it impossible to create a split design. If made into two separate halves, the two halves of the outer conductor will loosen when assembled onto the insulating base. This application innovatively designs the outer conductor as a split structure comprising two halves, specifically by extending the solder feet on each half outwards and connecting the ends of the solder feet together to maintain the integrity of the entire outer conductor, thus preventing loosening when the outer conductor is assembled onto the insulating base. This innovative design of extending and connecting the solder feet enables the split-half design of the outer conductor, replacing the traditional method of maintaining the integrity of the entire outer conductor through a single cylindrical section. The integrity of the outer conductor is transferred from the cylindrical section to the solder feet, thus freeing up the cylindrical section, improving upon the drawbacks of the industry's single-unit cylindrical structure, and solving a pain point in the industry. Attached Figure Description

[0023] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of a miniature radio frequency connector in the prior art;

[0025] Figure 2 This is a schematic diagram of the structure of the outer conductor in the prior art;

[0026] Figure 3 This is a schematic diagram of the structure of the miniature radio frequency connector in the embodiments of this application;

[0027] Figure 4 This is an exploded view of the miniature radio frequency connector in the embodiments of this application;

[0028] Figure 5 This is a side view of the miniature radio frequency connector in this embodiment of the application, viewed from the first end of the outer conductor to the second end.

[0029] Figure 6 This is a top view of the miniature radio frequency connector in an embodiment of this application;

[0030] Figure 7 for Figure 6 Schematic diagram of the AA section structure;

[0031] Figure 8 This is a schematic diagram of the structure of the outer conductor in an embodiment of this application;

[0032] Figure 9 This is a side view of the outer conductor from its first end to its second end in an embodiment of this application.

[0033] Figure 10 This is a side view of the outer conductor from the second end to the first end in an embodiment of this application.

[0034] Figure 11 This is a top view of the outer conductor in this application.

[0035] Figure 12 This is a top view of the outer conductor in another embodiment of this application;

[0036] Figure 13 This is a schematic diagram of the connection between the outer conductor and the material strip in an embodiment of this application.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 10-Miniature RF connector;

[0039] 100. Outer conductor; 110. Semi-cylindrical unit; 111. Semi-cylindrical section; 101. Cylindrical section; 112. Weld leg; 1121. Connecting part; 1122. Plate-shaped part; 1122a. Flanged edge; 113. Connecting rod;

[0040] 200, center terminal; 210, contact portion; 220, terminal pin;

[0041] 300. Insulating base; 301. Limiting groove; 302. Notch; 303. Stepped surface; 304. Boss; 3041. Guide surface;

[0042] 20. Material strip. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] This application provides a miniature radio frequency connector, specifically a miniature radio frequency connector with a wire end. For example... Figure 3 and Figure 4 As shown, the miniature RF connector 10 includes an outer conductor 100, a center terminal 200, and an insulating base 300. Both the outer conductor 100 and the center terminal 200 are disposed on the insulating base 300, which insulates the outer conductor 100 from the center terminal 200. Figure 3 As shown, the outer conductor 100 surrounds the center terminal 200. When the miniature RF connector 10 is plugged into the corresponding board connector, the outer conductor 100 of the miniature RF connector 10 engages with the outer conductor of the board connector, and the center terminal 200 of the miniature RF connector 10 contacts the center terminal of the board connector, thereby enabling signal transmission.

[0045] In the embodiments of this application, such as Figure 4 As shown, the outer conductor 100 includes two semi-cylindrical units 110, each of which includes a semi-cylindrical portion 111 and a solder foot 112 disposed at the bottom end of the semi-cylindrical portion 111. The two semi-cylindrical portions 111 enclose a cylindrical portion 101 for insertion with a mating connector (board connector). Figure 4 As shown, the inner wall of the cylindrical portion 101 protrudes inward, thereby securing the mating connector. (As indicated...) Figure 4 As shown, the insulating base 300 is provided with a limiting groove 301, and the cylindrical portion 101 is disposed in the limiting groove 301. The shape of the limiting groove 301 is adapted to the cylindrical portion 101, and it is a circular groove, so that the limiting groove 301 can limit the cylindrical portion 101 and prevent it from deforming and failing. It can be understood that, as Figure 4 As shown, the limiting groove 301 has notches 302 on both sides so that the welding foot 112 can be led outward through the notches 302. Figure 4 As shown, the end of the solder leg 112 extends to the side, extending the solder leg 112 to the side, leading out the solder leg 112, and connecting the ends of the two solder legs 112 together.

[0046] In the aforementioned miniature RF connector 10, the outer conductor 100 is innovatively designed as a split structure. The outer conductor 100 includes two semi-cylindrical units 110, which enclose the cylindrical portion 101 of the outer conductor 100. When the connector is engaged, the outer conductor 100 can open outward, increasing its range of motion, thereby reducing stress concentration, avoiding the problem of easy material damage, and extending the service life of the connector.

[0047] Meanwhile, the miniature RF connector 10 of this application has fewer solder pins 112. Each semi-cylindrical unit 110 has only one solder pin 112, and the entire outer conductor 100 has only two solder pins 112. Compared with the three solder pins (112a', 112b', 112c') of the traditional outer conductor 100', the miniature RF connector 10 of this application reduces the number of solder pins. Since stress concentration is prone to occur at the solder pins, reducing the number of solder pins reduces stress concentration, reduces damage to materials, and extends the service life of the connector.

[0048] As described in the background art, refer to Figure 2 As shown, the conventional outer conductor 100' can only be made as a single piece, with the cylindrical portion 101' being a closed cylinder. The integrity of the entire outer conductor 100' is maintained through this single, closed cylindrical portion 101'. The conventional outer conductor 100' cannot be made in a split form; if it were made in two halves, the two halves of the outer conductor 100' would loosen when assembled onto the insulating base 300'. This application solves this problem. (Refer to...) Figure 4 By making the outer conductor 100 into a split structure to reduce stress concentration, the integrity of the outer conductor 100 can be maintained, ensuring that it does not loosen when assembled onto the insulating base 300. Specifically, the solder feet 112 on each half of the outer conductor 100 are innovatively extended outward and their ends are connected to each other to maintain the integrity of the entire outer conductor 100. In this way, even though the cylindrical part 101 of the outer conductor 100 is a split two-half structure, the integrity of the outer conductor 100 can still be maintained by the interconnection of the solder feet, preventing the outer conductor 100 from loosening when assembled onto the insulating base 300. This innovative design of extending and connecting the solder feet 112 enables the design of the outer conductor 100 into two halves, replacing the traditional design where the outer conductor 100′ could only maintain the integrity of the entire outer conductor 100′ through an integral cylindrical part 101′. This application transfers the integrity of the outer conductor 100' achieved by the cylindrical part 101' in the prior art to the solder foot 112. The integrity of the outer conductor 100 is maintained by connecting through the solder foot 112, thereby freeing up the cylindrical part 101. The cylindrical part 101 can be made into a split type, which improves the drawbacks of the integrated cylindrical part 101' structure in the industry and solves the pain points of the industry.

[0049] refer to Figure 11 The first direction T is defined as a direction parallel to the tangent direction of the cylindrical portion 101. In one embodiment, as... Figure 11As shown, the two ends of the solder feet 112 along the first direction T are a first end B1 and a second end B2, respectively. The first end B1 of the solder feet 112 extends beyond the diameter d of the cylindrical portion 101 along the first direction T, and the first ends B1 of the two solder feet 112 are connected. This structural design allows the solder feet 112 to be led out to a position away from the cylindrical portion 101 before being connected. This avoids interference at the connection point of the solder feet 112 with the insertion of the cylindrical portion 101 into the mating connector. Furthermore, this design ensures that the ends of the two solder feet 112 are opposite each other, facilitating their connection.

[0050] It is understandable that the weld leg 112 may not extend beyond the diameter d of the cylindrical portion 101 along the first direction T. For example... Figure 13 As shown, the connection between the solder feet 112 can be an arc-shaped connection around the cylindrical portion 101, thus eliminating the need to extend the solder feet 112 before connection. However, this structure is difficult to form and has relatively poor structural performance. Figure 11 The structure shown is also inferior. Therefore, the preferred option is... Figure 11 The method shown is to extend the solder foot 112 beyond the diameter d range of the cylindrical portion 101 along the first direction T before reconnecting it.

[0051] like Figure 11 As shown, the connecting part between the two solder feet 112 can be a connecting rod 113. The two ends of the connecting rod 113 are connected to the solder feet 112 respectively. The outer conductor 100 is integrally cut and stamped from a metal sheet; therefore, the cylindrical portion 101, solder feet 112, and connecting rod 113 of the outer conductor 100 are all integrally formed structures. The connecting rod 113 is sheet-like and extends from one solder foot 112 to the other. The connecting rod 113 ensures the connection between the two semi-cylindrical units 110. The connecting rod 113 not only prevents the two semi-cylindrical units 110 from becoming loose when the outer conductor 100 is assembled to the insulating base 300, but also provides constraint for the two semi-cylindrical portions 111 when they open, preventing them from opening excessively.

[0052] refer to Figure 11 As mentioned above, the first end B1 of the solder leg 112 extends along the first direction to a position away from the cylindrical portion 101 before connecting the first ends B1 of the two solder legs 112. This ensures that the connecting rod 113 is spaced a distance S1 from the cylindrical portion 101, thereby preventing the connecting rod 113 from interfering with the insertion of the cylindrical portion 101 and the mating connector. The distance S1 between the connecting rod 113 and the cylindrical portion 101 can be adjusted as needed, for example, it can be 0.2mm-0.9mm.

[0053] In one embodiment, such as Figure 8As shown, the solder foot 112 includes a connecting portion 1121 and a plate-shaped portion 1122. The connecting portion 1121 extends from the bottom end of the semi-cylindrical portion 111 toward the cylindrical portion 101 in a direction axially away from the cylindrical portion 101 and toward the outside of the cylindrical portion 101. Figure 10 As shown, the axial direction of the cylindrical portion 101 away from the cylindrical portion 101 is downward, as shown in the reference diagram. Figure 10 The connecting portion 1121 extends downward and outward from the bottom end of the semi-cylindrical portion 111, thereby leading the welding feet 112 from the bottom end of the cylindrical portion 101 to both sides below the cylindrical portion 101. For example... Figure 11 As shown, the plate-shaped portion 1122 extends from the connecting portion 1121 along the first direction T, thereby extending the end of the welding leg 112 to a position away from the cylindrical portion 101 and where the ends of the two welding legs 112 are opposite each other, so as to facilitate the connection of the two welding legs 112.

[0054] Combination Figure 3 and Figure 7 As shown, the insulating base 300 is sandwiched between the bottom end of the semi-cylindrical portion 111 and the top end of the plate-shaped portion 1122, thereby fixing the outer conductor 100 to the insulating base 300. Specifically, as... Figure 7 As shown, the semi-cylindrical portion 111 is located in the limiting groove 301 on the insulating seat 300, and the bottom end face C1 of the semi-cylindrical portion 111 abuts against the bottom of the limiting groove 301; the top end face C2 of the plate-shaped portion 1122 of the welding foot 112 abuts against the bottom of the insulating seat 300, thereby the insulating seat 300 is sandwiched between the bottom end C1 of the semi-cylindrical portion 111 and the top end C2 of the plate-shaped portion 1122.

[0055] like Figure 8 As shown, the first ends B1 of the two solder feet 112 plate-shaped portions 1122 are connected. The plate-shaped portion 1122 is relatively flat and straight, providing more space and making it easier to connect than other parts of the outer conductor. Figure 8 As shown, the connecting rod 113 is connected between the first ends B1 of the two plate-shaped portions 1122.

[0056] like Figure 4 As shown, the top of the insulating base 300 is provided with a limiting step surface 303 for limiting the connecting rod 113, and the connecting rod 113 abuts against the limiting step surface 303. By providing the limiting step surface 303 on the insulating base 300 to limit the connecting rod 113, the connecting rod 113 can further limit the outer conductor 100, so that the outer conductor 100 is more stably assembled on the insulating base 300 and the movement of the outer conductor 100 is prevented.

[0057] like Figure 9 As shown, in one embodiment, the connecting rod 113 arches upward relative to the plate-like portion 1122. (See reference) Figure 4 and Figure 5The bottom of the connecting rod 113 and the side wall of the connecting rod 113 near the cylindrical part 101 are both in contact with the insulating base 300, and are grounded on the stepped surface 303 of the insulating base 300. For example... Figure 4 As shown, a frame is formed between the connecting rod 113 and the first end B1 of the two solder feet 112, which fits on the insulating base 300 and provides good limiting effect. In this embodiment, the connecting rod 113 is designed to arch upwards, so that the addition of the connecting rod 113 will not interfere with the assembly of the outer conductor 100. The outer conductor 100 can still be installed on the insulating base 300 from top to bottom as in the traditional assembly method, and the connecting rod 113 is directly snapped into the top of the insulating base 300.

[0058] In the embodiments of this application, such as Figure 12 As shown, the connecting rod 113 can also be used to connect the external material strip 20. During the forming process of the outer conductor 100, the material strip 20 needs to be connected to facilitate the batch feeding of the outer conductor 100 on the equipment. After the outer conductor is formed, the material strip 20 can be cut. In the embodiment of this application, as shown in FIG13, the connecting rod 113 can be used to connect the material strip 20. In the prior art, such as Figure 2 As shown, the outer conductors 100′ are all connected to the strip 20 via solder feet 112b′. After the strip 20 is cut, solder feet 112b′ are left. However, in this embodiment, the strip 20 is connected via a connecting rod 113, thus eliminating the need for solder feet 112b′ in the prior art. Reducing one solder foot reduces stress concentration.

[0059] In one embodiment, such as Figure 8 and Figure 10 As shown, the inner side of the plate-shaped portion 1122 is provided with an upwardly folded flange 1122a, which means folding upwards along the axial direction of the cylindrical portion 101 toward the top of the cylindrical portion 101. Figure 4 As shown, the side wall of the insulating base 300 is provided with a boss 304, which extends outward from the insulating base 300. For example... Figure 7 As shown, the top end C2 of the flange 1122a abuts against the bottom of the boss 304. As mentioned above, the bottom end C1 of the semi-cylindrical portion 111 abuts against the top of the insulating seat 300. This causes the insulating seat 300 to be clamped between the top end C2 of the flange 1122a and the bottom end C1 of the semi-cylindrical portion 111, thus clamping the insulating seat 300.

[0060] like Figure 4 and Figure 7 As shown, in order to facilitate the flange 1122a to be inserted into the bottom of the boss 304, an inclined guide surface 3041 can be provided on the top of the boss 304, so that the plate-shaped part 1122 of the welding foot 112 can slide down along the guide surface 3041 to the bottom of the boss 304, and the flange 1122a can be inserted into the bottom of the boss 304.

[0061] like Figure 11 As shown, the flange 1122a and the connecting rod 113 are spaced apart by a distance of S2. This prevents the connecting rod 113 from affecting the elasticity of the flange 1122a, ensuring that the flange 1122a has sufficient elasticity to smoothly engage under the boss 304.

[0062] like Figure 8 As shown, there is a gap H between the two semi-cylindrical portions 111. The gap H prevents the two semi-cylindrical portions 111 from contacting each other, thus not restricting their movement and providing a larger clamping space. Figure 8 As shown, each semi-cylindrical portion 111 is C-shaped, and the two semi-cylindrical portions 111 are joined to form a basic cylinder. A gap H is provided between the two ends of the C-shape of the two semi-cylindrical portions 111.

[0063] In one embodiment, such as Figure 4 As shown, the center terminal 200 includes a contact portion 210 and a terminal pin 220. (Combined) Figure 3 As shown, the center terminal 200 is embedded in the insulating base 300 and is integrally injection molded with the insulating base 300. Combined Figure 3 As shown, the contact portion 210 of the center terminal 200 is located at the center of the cylindrical portion 101 of the outer conductor 100, and the terminal foot 220 of the center terminal 200 extends from the insulating base 300 between the second ends B2 of the two solder feet 112 of the outer conductor 100, so as to solder the terminal foot 220 of the center terminal 200 to the external device.

[0064] The molding process of the miniature radio frequency connector 10 in this application is as follows:

[0065] The center terminal 200 is stamped and formed;

[0066] The center terminal 200 and the insulating base 300 are integrally injection molded;

[0067] The outer conductor 100 is stamped into shape;

[0068] The outer conductor 100 is assembled together with the injection-molded center terminal 200 and the insulating base 300.

[0069] When in use, simply snap the miniature RF connector 10 into the corresponding board connector.

[0070] The technical features in the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above merely illustrate the implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A miniature radio frequency connector, characterized in that, It includes an outer conductor, a center terminal, and an insulating base; both the outer conductor and the center terminal are disposed on the insulating base, and the outer conductor surrounds the center terminal. The outer conductor includes two semi-cylindrical units, each of which includes a semi-cylindrical portion and a solder foot located at the bottom of the semi-cylindrical portion. The two semi-cylindrical portions are joined to form a cylindrical portion for insertion into a mating connector. The insulating base is provided with a limiting groove, and the cylindrical portion is located in the limiting groove. The end of the solder foot extends laterally, and the ends of the two solder feet are connected.

2. The miniature radio frequency connector according to claim 1, characterized in that, The first direction is defined as a direction parallel to the tangent direction of the cylindrical portion; the two ends of the weld leg along the first direction are a first end and a second end, respectively; the first end extends beyond the diameter range of the cylindrical portion along the first direction, and the first ends of the two weld legs are connected.

3. The miniature radio frequency connector according to claim 2, characterized in that, The weld leg includes a connecting portion and a plate-shaped portion; The connecting portion extends from the bottom end of the semi-cylindrical portion toward the cylindrical portion in a direction axially away from the cylindrical portion and toward the outside of the cylindrical portion, and the plate-shaped portion extends from the connecting portion along the first direction; The insulating seat is sandwiched between the bottom end of the semi-cylindrical portion and the top end of the plate-shaped portion.

4. The miniature radio frequency connector according to claim 3, characterized in that, The first ends of the two plate-shaped portions are connected.

5. The miniature radio frequency connector according to claim 4, characterized in that, The first ends of the two plate-shaped portions are connected by a connecting rod.

6. The miniature radio frequency connector according to claim 5, characterized in that, The top of the insulating base is provided with a limiting step surface for limiting the position of the connecting rod, and the connecting rod abuts against the limiting step surface.

7. The miniature radio frequency connector according to claim 6, characterized in that, The connecting rod arches upward relative to the plate-shaped portion, and the bottom of the connecting rod and the side wall of the connecting rod near the cylindrical portion abut against the insulating seat.

8. The miniature radio frequency connector according to claim 3, characterized in that, The inner side of the plate-shaped portion is provided with an upwardly folded flange, and the side wall of the insulating seat is provided with a boss that extends outward from the insulating seat. The top of the flange abuts against the bottom of the boss to clamp the insulating seat.

9. The miniature radio frequency connector according to claim 1, characterized in that, There is a gap between the two semi-cylindrical portions.

10. The miniature radio frequency connector according to claim 4, characterized in that, The center terminal includes a contact portion and a terminal foot. The contact portion is located at the center of the cylindrical portion, and the terminal foot extends out of the insulating seat between the second ends of the two solder feet.