SMA male pin connector

Abstract

The SMA male pin connector comprises a connecting nut, a shell, an insulator and a center pin, the upper end of the shell is provided with a blind hole for placing the insulator, the lower end of the shell is provided with a round hole for the center pin to pass through, the center pin comprises an electric contact part at the front end, a wire fixing part and a wire clamping part, and a limiting table is arranged between the wire fixing part and the wire clamping part. The electric contact part, the electric wire fixing part and the limiting table are all cylindrical, the outer diameter of the electric contact part is smaller than that of the electric wire fixing part, the outer diameter of the electric wire fixing part is smaller than that of the limiting table, and the center pin is manufactured by adopting an integrated stamping process. According to the SMA male pin connector, the electric contact part of the central pin is contacted and electrified with the terminal matched with the central pin; the electric wire clamping part is used for clamping an electric wire, preventing the electric wire from falling off, preventing signal transmission from being influenced, and ensuring that a high-frequency 0-8G electrical value of the connector can be stabilized within a standing wave of 1.5, and the electric wire clamping part adopts a riveting mode to press two sides of the electric wire inwards and fix an outer layer of an insulating layer of the electric wire, so that the connection stability of the connector is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of connector accessories, in particular to an SMA male pin connector. Background Art

[0002] The SMA connector is a widely used, small, threaded coaxial connector that offers wide bandwidth, excellent performance, high reliability, and long life. It is suitable for microwave applications up to 26.5 GHz. Applications include telecommunications, networking, wireless communications, and testing and measurement instruments.

[0003] Currently, US military-standard SMA connectors all feature a machined center pin and are connected using a welding process. This results in low production efficiency, widespread false and poor solder joints, high component costs, and the development of automated production equipment. Furthermore, unstable connections with wires are common, leading to unstable signal transmission. Therefore, a new SMA connector is urgently needed to address these issues. Utility Model Content

[0004] The purpose of the utility model is to provide an SMA male pin connector to solve the technical problems of high production cost and unstable signal transmission of the center pin of the existing connector.

[0005] The utility model discloses an SMA male pin connector, comprising a connecting nut, a shell, an insulator and a center pin, wherein the shell is sleeved in the connecting nut, the insulator is arranged inside the shell, and the center pin is arranged inside the insulator, wherein the inner wall of the upper end of the shell is a threaded structure, and the inner wall of the lower end is a planar structure, the upper end of the shell is provided with a blind hole for placing the insulator, and the lower end is provided with a circular hole for the center pin to pass through, the center pin comprises an electrical contact portion at the front end, a wire fixing portion in the middle and a wire clamping portion at the rear end, a limit platform is provided between the wire fixing portion and the wire clamping portion, the electrical contact portion, the wire fixing portion and the limit platform are all cylindrical, the outer diameter of the electrical contact portion is smaller than the outer diameter of the wire fixing portion, the outer diameter of the wire fixing portion is smaller than the outer diameter of the limit platform, and the center pin is manufactured by an integrated stamping process, and one side thereof is an open structure.

[0006] Preferably, a first annular groove is provided on the periphery of the shell, a clamping ring is provided on the first annular groove, and a second annular groove adapted to the clamping ring is provided on the inner side of the connecting nut.

[0007] Preferably, a waterproof ring is provided on the periphery of the upper portion of the shell, and a protective tube for protecting the electric wires is provided on the bottom of the shell.

[0008] Preferably, the outer shell wraps the center needle inside thereof, and the front end of the center needle is exposed and placed inside the connecting nut.

[0009] Preferably, a limiting groove is provided at the bottom of the insulator, and the limiting platform is placed in the limiting groove.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] This SMA male pin connector includes a coupling nut, a housing, an insulator, and a center pin. The center pin includes an electrical contact portion, a wire retaining portion, a wire clamping portion, and a stop. The electrical contact portion connects to its mating terminal, energizing and transmitting signals. The wire retaining portion wraps around the wire, while the wire clamping portion holds the wire in place to prevent it from falling out and affecting signal transmission, ensuring the connector's high-frequency 0-8G electrical performance remains stable within a standing wave of 1.5. The wire clamping portion is designed in a "V" shape during production. During use, its sides are riveted inward to secure the outer insulation layer around the wire. The stopper has an outer diameter larger than that of the wire retaining portion and the wire clamping portion, ensuring the center pin will not fall out after being installed on the insulator and facilitating installation and removal. The center pin in the middle of the housing is manufactured using a one-piece stamping process, allowing for simultaneous stamping of multiple center pins. This reduces the cost of developing automated production equipment, improves production efficiency, reduces defect rates, and reduces component costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of the split structure of an embodiment of an SMA male pin connector of the present utility model.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of an SMA male pin connector of the present utility model.

[0015] In the figure: 1. Connecting nut; 2. Housing; 21. Blind hole; 22. First annular groove; 3. Insulator; 4. Center pin; 41. Electrical contact portion; 42. Wire fixing portion; 43. Wire clamping portion; 44. Limiting platform; 5. Clamping ring; 6. Waterproof ring; 7. Protective tube. DETAILED DESCRIPTION

[0016] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0017] like Figure 1As shown, an SMA male pin connector of the present invention includes a connecting nut 1, a shell 2, an insulator 3 and a center pin 4. The shell 2 is sleeved in the connecting nut 1, the insulator 3 is arranged inside the shell 2, and the center pin 4 is arranged inside the insulator 3. The inner wall of the upper end of the shell 2 is a threaded structure, and the inner wall of the lower end is a planar structure. The upper end of the shell 2 is provided with a blind hole 21 for placing the insulator, and the lower end is provided with a circular hole for the center pin to pass through. The center pin 4 includes an electrical contact portion 41 at the front end, a wire fixing portion 42 in the middle and a wire clamping portion 43 at the rear end. A limit platform 44 is provided between the wire fixing portion 42 and the wire clamping portion 43. The electrical contact portion 41, the wire fixing portion 42 and the limit platform 44 are all cylindrical. The outer diameter of the electrical contact portion 41 is smaller than the outer diameter of the wire fixing portion 42, and the outer diameter of the wire fixing portion 42 is smaller than the outer diameter of the limit platform 44. The center pin 4 is made by an integrated stamping process, and one side of it is an open structure.

[0018] The connector of the present invention mainly includes a connecting nut 1, a shell 2, an insulator 3 and a center pin 4, wherein the center pin 4 is arranged in the insulator 3, the insulator is arranged in the shell 2, the shell 2 is arranged in the connecting nut 1, and the inner wall of the upper end of the shell 2 is a threaded structure. When in use, it is screwed with the external female pin connector; the center pin 4 includes an electrical contact portion 41, a wire fixing portion 42, a wire clamping portion 43 and a limit platform 44. The electrical contact portion 41 contacts and conducts electricity with its paired terminal to transmit signals; the wire fixing portion 42 is used to wrap the wire; the wire clamping portion 43 is used to hold the wire in place. 3 is used to clamp the wires to prevent them from falling out and affecting signal transmission, ensuring that the high-frequency 0-8G electrical performance of the connector can be stabilized within a standing wave of 1.5. The wire clamping part 43 is set to a "V" shape during production. When in use, it is riveted inward on both sides to fix and lock the outer layer of the insulation layer around the wire to prevent it from falling off and affecting the connector signal transmission. The outer diameter of the limit platform 44 is larger than the outer diameter of the wire fixing part 42 and the wire clamping part 43, ensuring that the center pin 4 will not fall out after being installed on the insulator 3. At the same time, it is also convenient for installation and removal. The center pin 4 in the middle of the shell 2 is made by an integrated stamping process. Multiple center pins can be stamped and formed at the same time, reducing the cost of developing automated production equipment for the product, improving production efficiency, reducing production defect rates, and also reducing component costs.

[0019] In a preferred embodiment, referring to Figure 1 and 2The outer periphery of the shell 2 of the SMA male pin connector is provided with a first annular groove 22, a clamping ring 5 is provided on the first annular groove 22, and a second annular groove (not shown in the figure) adapted to the clamping ring 5 is provided on the inner side of the connecting nut 1. A waterproof ring 6 is provided on the outer periphery of the upper part of the shell 2, and a protective tube 7 for protecting the wires is provided at the bottom of the shell 2. The shell 2 wraps the center needle 4 inside it, and the front end of the center needle 4 is exposed and placed inside the connecting nut 1. By arranging the clamping ring 5 on the outer periphery of the shell 2, the clamping ring 5 is arranged between the first annular groove and the second annular groove, and the shell 2 is clamped inside the connecting nut 1 to prevent the shell 2 from falling out; by arranging the waterproof ring 6 on the shell 2, water is prevented from entering the shell 2 to affect the use of the connector; by arranging the protective tube 7 at the bottom of the shell 2, it plays a role in protecting the wires.

[0020] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An SMA male pin connector comprising a coupling nut, a housing, an insulator, and a center pin, wherein the housing is sleeved within the coupling nut, the insulator is disposed within the housing, and the center pin is disposed within the insulator, characterized in that: The inner wall of the upper end of the shell is a threaded structure, and the inner wall of the lower end is a planar structure. The upper end of the shell is provided with a blind hole for placing an insulator, and the lower end is provided with a circular hole for a center needle to pass through. The center needle includes an electrical contact part at the front end, a wire fixing part in the middle and a wire clamping part at the rear end. A limit platform is provided between the wire fixing part and the wire clamping part. The electrical contact part, the wire fixing part and the limit platform are all cylindrical. The outer diameter of the electrical contact part is smaller than the outer diameter of the wire fixing part, and the outer diameter of the wire fixing part is smaller than the outer diameter of the limit platform. The center needle is made by an integrated stamping process, and one side of it is an open structure.

2. The SMA male pin connector according to claim 1, wherein: A first annular groove is provided on the periphery of the shell, a clamping ring is provided on the first annular groove, and a second annular groove adapted to the clamping ring is provided on the inner side of the connecting nut.

3. The SMA male pin connector according to claim 1, wherein: A waterproof ring is provided on the periphery of the upper portion of the shell, and a protective tube for protecting the electric wires is provided on the bottom of the shell.

4. The SMA male pin connector according to claim 1, wherein: The shell wraps the center needle inside, and the front end of the center needle is exposed and placed inside the connecting nut.

5. The SMA male pin connector according to claim 1, wherein: A limiting groove is provided at the bottom of the insulator, and the limiting platform is placed in the limiting groove.

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