A high-reliability SMA RF connector for walkie-talkies

Abstract

This utility model discloses a high-reliability SMA RF connector for walkie-talkies, comprising an SMA outer conductor, an SMA inner conductor, and an SMA insulator. The SMA outer conductor has two annular grooves on its outer wall section for overmolding with the walkie-talkie main unit. The SMA inner conductor is coaxially disposed inside the SMA outer conductor via the SMA insulator. The SMA inner conductor includes a front female pin claw and a rear connecting portion. This utility model, through the double groove design of the SMA outer conductor, increases the gripping points during overmolding, effectively preventing the connector from warping or breaking after drop testing, thus meeting high drop requirements. The SMA inner conductor is assembled from the female pin claw and the connecting portion using a segmented splicing assembly. The female pin claw is made of beryllium copper, providing excellent elasticity and ensuring contact stability after swing testing. The connecting portion is made of phosphor bronze or brass, reducing costs and achieving high reliability and low cost.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency communication technology, and in particular to a high-reliability SMA radio frequency connector for walkie-talkies. Background Technology

[0002] In existing SMA RF connectors for walkie-talkies, the outer conductor typically uses a single-slot design. After being overmolded, it is prone to breakage or misalignment during drop tests due to having only one gripping point. Meanwhile, the inner conductor usually uses a monolithic design, often made of brass or phosphor bronze. These materials have poor elasticity and are prone to contact instability, decreased electrical performance, or even failure after repeated shaking tests. Furthermore, using beryllium copper for the entire connector is too expensive and cannot meet the high requirements of walkie-talkie antenna and main unit connections. Summary of the Invention

[0003] To overcome the technical defects of the existing technology, this utility model provides a high-reliability SMA radio frequency connector for walkie-talkies.

[0004] The technical solution adopted in this utility model is: a high-reliability SMA radio frequency connector for walkie-talkies, including an SMA outer conductor, an SMA inner conductor, and an SMA insulator. The SMA outer conductor has at least two annular grooves on its outer wall section for being coated with the walkie-talkie main unit. The SMA inner conductor is coaxially disposed inside the SMA outer conductor through the SMA insulator. The SMA inner conductor includes a front female pin claw and a rear connecting part. The female pin claw and the connecting part are fixedly connected by a segmented splicing assembly. The female pin claw is made of beryllium copper, and the connecting part is made of phosphor bronze or brass.

[0005] Preferably, the segmented splicing assembly includes a connecting post at one end of the female pin claw and a connecting groove at one end of the connecting part that matches the connecting post, with the connecting post and the connecting groove being threadedly connected.

[0006] Preferably, the inner end of the connector is tapered, and the interior of the SMA insulator is provided with a tapered groove that matches the connector.

[0007] Preferably, the inner wall of the conical groove is provided with an inverted conical groove, and the outer wall of the connecting part is provided with an inverted conical ring that matches the inverted conical groove.

[0008] Preferably, the outer conductor of the SMA is made of one of brass H62, brass C3600, stainless steel 303, or stainless steel 304F.

[0009] Preferably, the SMA insulator is made of PTFE material.

[0010] Preferably, the SMA outer conductor and the SMA insulator are interference-fitted.

[0011] The beneficial effects of this utility model are: 1. The double groove design of the SMA outer conductor increases the gripping points during overmolding, effectively preventing the connector from tilting or breaking after drop testing, thus meeting high drop requirements; 2. The inner conductor of the SMA is spliced ​​together by a segmented splicing assembly consisting of a female pin claw and a connector. The female pin claw is made of beryllium copper, which provides excellent elasticity and ensures contact stability after a swing test. The connector is made of phosphor bronze or brass, which reduces costs and achieves high reliability and low cost. Attached Figure Description

[0012] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the SMA inner conductor structure of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. SMA outer conductor; 101. Groove; 2. SMA inner conductor; 201. Female pin claw; 2011. Connecting post; 2012. Connecting groove; 202. Connecting part; 203. Conical groove; 204. Inverted conical groove; 205. Inverted conical ring; 206. Segmented splicing assembly; 3. SMA insulator. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0016] like Figure 1 and Figure 2As shown, this embodiment provides a high-reliability SMA RF connector for walkie-talkies, including an SMA outer conductor 1, an SMA inner conductor 2, and an SMA insulator 3. The SMA outer conductor 1 has two annular grooves 101 on its outer wall section for overmolding with the walkie-talkie main unit. The SMA inner conductor 2 is coaxially disposed inside the SMA outer conductor 1 via the SMA insulator 3. The SMA inner conductor 2 includes a front female pin claw 201 and a rear connecting portion 202. The female pin claw 201 and the connecting portion 202 are fixedly connected by a segmented splicing assembly 206. The female pin claw 201 is made of beryllium copper. The connector 202 is made of phosphor bronze or brass. The double grooves 101 of the SMA outer conductor 1 increase the gripping points during the overmolding process, effectively preventing the connector from tilting or breaking after the drop test, thus meeting the high drop requirements. The SMA inner conductor 2 is spliced ​​by the female pin claw 201 and the connector 202 through the segmented splicing assembly 206. The female pin claw 201 is made of beryllium copper, which provides excellent elasticity and ensures the stability of the contact after the swing test. The connector 202 is made of phosphor bronze or brass, which reduces the cost and achieves high reliability and low cost.

[0017] The segmented splicing assembly 206 includes a connecting post 2011 at one end of the female pin claw 201 and a connecting groove 2012 at one end of the connecting part 202 that matches the connecting post 2011. The connecting post 2011 and the connecting groove 2012 are threaded together. The threaded connection of the segmented splicing assembly 206 ensures a firm connection between the female pin claw 201 and the connecting part 202, facilitating assembly and disassembly, and providing a stable electrical connection. To ensure the stability of radio frequency signal transmission, the mating dimensions of the connecting post 2011 and the connecting groove 2012 are precisely designed so that the characteristic impedance at their joint matches the nominal impedance of the SMA inner conductor 2 as a whole (50 ohms), with a deviation controlled within ±5%. Preferably, a highly conductive metal layer (such as silver or gold) with a thickness of 0.5~2μm can be plated on the outer surface of the connecting post 2011 or the inner wall of the connecting groove 2012 to reduce contact resistance and ensure the continuity of the electrical connection. Tests showed that the segmented structure has a voltage standing wave ratio (VSWR) of less than 1.3 at 6 GHz, which meets the requirements for high-frequency signal transmission.

[0018] The inner end of the connecting part 202 is tapered, and the interior of the SMA insulator 3 is provided with a tapered groove 203 that matches the connecting part 202, which enhances the tightness of the fit between the SMA inner conductor 2 and the SMA insulator 3 and prevents the SMA inner conductor 2 from loosening when it swings or falls.

[0019] The inner wall of the tapered groove 203 is provided with an inverted tapered groove 204, and the outer wall of the connecting part 202 is provided with an inverted tapered ring 205 that matches the inverted tapered groove 204. The inverted tapered groove 204 and the inverted tapered ring 205 cooperate to form a lock, further preventing the inner conductor 2 of the SMA from coming out of the SMA insulator 3 and enhancing the tensile strength.

[0020] The SMA outer conductor 1 is made of one of brass H62, brass C3600, stainless steel 303, or stainless steel 304F, providing flexibility in material selection to adapt to different application environments. Brass C3600 is preferred for the SMA outer conductor 1, as it has good machinability and sufficient mechanical strength, making it easy to machine precise grooves 101. In applications requiring higher corrosion resistance, stainless steel 304F can be selected.

[0021] The SMA insulator 3 is made of PTFE material. PTFE material has a stable dielectric constant of about 2.1, which changes very little in the temperature range of -55°C to +200°C. It also has a low loss factor, which can effectively ensure the transmission efficiency and stability of radio frequency signals. At the same time, its inherent lubricity and non-stickiness facilitate the assembly of the inner conductor. It has excellent insulation performance, high temperature resistance and chemical stability, ensuring the reliability of SMA radio frequency connectors in harsh environments.

[0022] The SMA outer conductor 1 and the SMA insulator 3 are interference-fitted, with the interference amount controlled between 0.03mm and 0.06mm, ensuring a tight connection between the SMA outer conductor 1 and the SMA insulator 3, preventing loosening, and improving the strength of the SMA RF connector.

[0023] During operation, the walkie-talkie antenna connects to the main unit via an SMA RF connector. The dual grooves 101 on the outer conductor 1 of the SMA provide multiple gripping points during the overmolding process, ensuring the SMA RF connector is firmly fixed to the main unit and resisting the impact of drops. The female pin claw 201 of the inner conductor 2 of the SMA is made of beryllium copper, which has good elasticity and can maintain stable contact with the male pin after multiple insertion / removal and swing tests, ensuring the reliability of signal transmission. The connecting part 202 is made of phosphor bronze or brass and is connected to the female pin claw 201 through a splicing design, which ensures both performance and cost reduction. The PTFE material of the SMA insulator 3 provides stable insulation support, while the interference fit enhances the stability of the internal components, enabling reliable connection after 30 drops from 1.5 meters and 200 swings, and achieving a lifespan of 1000 cycles.

[0024] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0025] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A high-reliability intercom SMA RF connector, characterized by: It includes an SMA outer conductor (1), an SMA inner conductor (2) and an SMA insulator (3). The SMA outer conductor (1) has at least two annular grooves (101) on its outer wall section for being coated with the walkie-talkie main unit. The SMA inner conductor (2) is coaxially disposed inside the SMA outer conductor (1) through the SMA insulator (3). The SMA inner conductor (2) includes a front female needle claw (201) and a rear connecting part (202). The female needle claw (201) and the connecting part (202) are fixedly connected by a segmented splicing assembly (206). The female needle claw (201) is made of beryllium copper, and the connecting part (202) is made of phosphor bronze or brass.

2. A high-reliability intercom SMA RF connector according to claim 1, characterized in that: The segmented splicing assembly (206) includes a connecting post (2011) at one end of the female needle claw (201) and a connecting groove (2012) at one end of the connecting part (202) that matches the connecting post (2011). The connecting post (2011) and the connecting groove (2012) are threaded together.

3. A high-reliability intercom SMA RF connector according to claim 1, characterized in that: The inner end of the connecting part (202) is tapered, and the interior of the SMA insulator (3) is provided with a tapered groove (203) that matches the connecting part (202).

4. A high-reliability intercom SMA RF connector according to claim 3, characterized in that: The inner wall of the conical groove (203) is provided with an inverted conical groove (204), and the outer wall of the connecting part (202) is provided with an inverted conical ring (205) that matches the inverted conical groove (204).

5. A high-reliability intercom SMA RF connector according to claim 1, characterized in that: The material of the SMA outer conductor (1) is one of brass H62, brass C3600, stainless steel 303 or stainless steel 304F.

6. A high-reliability intercom SMA RF connector as in claim 1, wherein: The SMA insulator (3) is made of PTFE material.

7. A high-reliability intercom SMA RF connector as in claim 1, wherein: The SMA outer conductor (1) is interference-fitted with the SMA insulator (3).

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