SMA female connector

Abstract

The SMA female head connector comprises a shell, an insulator and a central sleeve, the outer wall of the shell is provided with external threads, the shell is internally provided with a blind hole for placing the insulator, the middle part of the insulator is provided with a central hole, the central hole is a step-shaped hole, the central sleeve is arranged in the central hole, and the central sleeve comprises an electric contact part at the front end. The electric wire fixing part, the electric wire clamping part and the electric contact part are a plurality of connecting pieces in an annular array, a gap is reserved between every two adjacent connecting pieces, the outer diameter of the electric wire fixing part is smaller than that of the limiting table, and the center sleeve is manufactured through an integrated stamping process. According to the SMA female head connector, the electric contact part of the central sleeve is contacted and electrified with the terminal matched with the central sleeve; 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, particularly relates to a SMA female head connector. BACKGROUND

[0002] SMA connector is a kind of widely used small thread connection coaxial connector, it has the characteristics of wide frequency band, high performance, high reliability and long service life.SMA connector is suitable for the application in the microwave field with the frequency range up to 26.5GHz.Application range such as telecommunications, network, wireless communication and detection and measuring instrument.

[0003] At present, the SMA connector of US military standard is pin center sleeve, adopts welding process connection, and the production efficiency is low, false welding, virtual welding phenomenon is widespread, and the cost of parts is high, the development cost of automatic production equipment is high, and the phenomenon of unstable connection with wire exists universally, to cause unstable signal transmission.Therefore, a new type of SMA connector is needed to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model is to provide a kind of SMA female head connector, to solve the technical problems of high production cost of the center sleeve of existing connector and unstable signal transmission.

[0005] The utility model discloses a kind of SMA female head connectors, including shell, insulator and center sleeve, the insulator is located inside shell, the center sleeve is located inside insulator, it is characterized by: the outer wall of the upper end of shell is equipped with external thread, the outer wall of lower end is plane structure, the inside of shell is equipped with the blind hole of placing insulator, the middle part of insulator is equipped with center hole, the center hole is ladder type hole, the hole diameter of the front end is less than the hole diameter of rear end, the center sleeve is placed in center hole, the center sleeve includes the electrical contact part of front end, wire fixed part in middle part and wire clamping part in rear end, limit table is equipped between wire fixed part and wire clamping part, the electrical contact part is a plurality of annular array connecting pieces, and there is gap between adjacent two connecting pieces, wire fixed part and limit table are all cylindrical, the outer diameter of wire fixed part is less than the outer diameter of limit table, the center sleeve is made by the process of integrally stamping.

[0006] Preferably, the electrical contact part wraps the electrical contact part of male head inside.

[0007] Preferably, the front end of the electrical contact part is flush with the front end of the insulator, and the front end of the connecting piece extends outward to form a horn shape.

[0008] Preferably, the middle part of the blind hole is provided with a protrusion, and the middle part of the insulator is provided with a first limiting groove matched with the protrusion.

[0009] Preferably, the middle part of the center hole is provided with a second limiting groove, and the limiting platform is arranged in the second limiting groove.

[0010] Compared with the prior art, the utility model has the beneficial effects that:

[0011] The SMA female connector, comprising a shell, an insulator and a center sleeve, the center sleeve comprises an electrical contact part, a wire fixing part, a wire clamping part and a limiting platform, the electrical contact part is in contact with a center pin matched therewith to conduct electricity and transmit signals; the wire fixing part is used for wrapping the wire; the wire clamping part is used for clamping the wire to prevent the wire from coming out and affecting signal transmission, and ensures that the high-frequency 0-8G electrical value of the connector can be stably kept within 1.5 of standing wave, the wire clamping part is set as a "V" type during production, and the two sides of the wire clamping part are pressed inward in a riveting manner during use to fix the outer layer of the insulating layer of the wire; the limiting platform has an outer diameter greater than that of the wire fixing part and the wire clamping part, so that the center sleeve cannot come out after being installed on the insulator, and meanwhile, installation and dismounting are facilitated. The center sleeve in the middle part of the shell is made of an integrated stamping process, so that multiple center sleeves can be simultaneously stamped and formed, development cost of automatic production equipment of the product is reduced, production efficiency is improved, production failure rate is reduced, and meanwhile, part cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further explained in connection with the drawings and embodiments:

[0013] Figure 1 is a split structure schematic view of an embodiment of the SMA female connector of the utility model;

[0014] Figure 2 is a three-dimensional structure schematic view of an embodiment of the SMA female connector of the utility model;

[0015] Figure 3 is a front view structure schematic view of an embodiment of the SMA female connector of the utility model;

[0016] Figure 4 is Figure 3 the cross-sectional structure schematic view of A-A.

[0017] In the figure: 1, shell; 11, external thread; 12, blind hole; 121, lug; 2, insulator; 21, center hole; 211, second limiting groove; 22, first limiting groove; 3, center sleeve; 31, electrical contact part; 311, connecting piece; 312, gap; 32, wire fixing part; 33, wire clamping part; 34, limiting platform. DETAILED DESCRIPTION

[0018] The detailed embodiments of the utility model will be described in this part, the preferred embodiments of the utility model are shown in the drawings, the function of the drawings is to supplement the description of the written part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0019] As Figures 1-4 The utility model discloses a SMA female head connector, including shell 1, insulator 2 and center sleeve 3, the insulator 2 is located inside shell 1, the center sleeve 3 is located inside insulator 2, the outer wall of the upper end of shell 1 is equipped with outer thread 11, the outer wall of the lower end is the plane structure, the inside of shell 1 is equipped with the blind hole 12 of placing insulator, the middle part of insulator 2 is equipped with center hole 21, center hole 21 is the stepped hole, and the hole diameter of the front end is less than the hole diameter of the rear end, and center sleeve 3 is placed in center hole 21, and center sleeve 3 includes the electric contact part 31 of the front end, the wire fixed part 32 of the middle part and the wire clamping part 33 of the rear end, and the wire fixed part 32 and wire clamping part 33 are equipped with the limiting stage 34 between, the electric contact part 31 is a plurality of annular array's connecting sheet 311, and the gap 312 is left between two adjacent connecting sheet 311, and the wire fixed part 32 and limiting stage 34 are all cylindrical, and the outer diameter of wire fixed part 32 is less than the outer diameter of limiting stage 34, and center sleeve 3 is made by the process of integrative stamping.

[0020] The utility model discloses a SMA female head connector, it is mainly including shell 1, insulator 2 and center sleeve 3, wherein, insulator 2 sets up inside shell 1, center sleeve 3 sets up inside insulator 2, and the outer wall of the upper end of shell 1 is provided with outer thread 11, uses, can with male connector screw joint, center sleeve 3 includes electric contact part 31, electric wire fixed part 32, electric wire clamping part 33 and limit platform 34, electric contact part 31 is connected with the center needle of male needle connector, and conduction is electrified, and signal transmission, electric wire fixed part 32 is used for wrapping up electric wire, electric wire clamping part 33 is used for clamping electric wire, prevents electric wire from falling out, influences signal transmission, guarantees that the high frequency 0-8G electric property value of connector can be stabilized in within 1.5 of standing wave, and electric wire clamping part 33 is set as " V " type when producing, and when using, the mode of riveting pressure is used to press inwards to its both sides, and the outer layer of the insulating layer of electric wire periphery is fixed, locked, prevents falling off, avoids influencing connector signal transmission, through setting up multiple annular array connecting pieces 311 for electric contact part 31, and guaranteeing that the gap 312 between adjacent two connecting pieces 311 is left, the center needle of the male needle connector that is adapted to it is inserted and cooperates with it, in addition, connecting piece 311 is preferably set as three pieces, and is integrally formed with electric wire fixed part 32, and the outer diameter of electric contact part 31 is slightly less than the outer diameter of electric wire fixed part 32, the distance between connecting piece is also can be adaptively regulated according to the in / out of center needle, and the center needle is clamped, the outer diameter of limit platform 34 is greater than the outer diameter of electric wire fixed part 32 and electric wire clamping part 33, guarantees that center sleeve 3 is installed on insulator 2, and will not fall out, simultaneously, also facilitates installation, dismounting. Center sleeve 3 is made by integrated stamping process, can stamping form multiple center sleeves simultaneously, reduces product automation production equipment development cost, improves production efficiency, reduces production defective rate, and also can reduce the cost of parts.

[0021] In a preferred embodiment, referring to Figures 1-4 The electric contact part 31 of the SMA female head connector wraps the electric contact part of the male head inside. The front end of the electric contact part 31 is flush with the front end of the insulator 2, and the front end of the connecting piece 311 extends outward, forming a horn shape. The middle part of the blind hole 12 is provided with a protrusion 121, and the middle part of the insulator 2 is provided with a first limiting groove 22 matched with the protrusion 121. The middle part of the center hole 21 is provided with a second limiting groove 211, and the limit platform 34 is placed in the second limiting groove 211.

[0022] The female connector is in contact with the electric contact part 31 of the male connector when installed and used, and the electric contact part 31 of the female connector is in contact with the electric contact part 31 of the male connector to transmit signals; the plurality of connecting pieces 311 at the front end of the electric contact part 31 extend outward to form a horn shape, facilitating the insertion of the center needle; the protrusion 121 is arranged in the middle of the blind hole 12, the first limiting groove 22 is arranged in the middle of the insulator, the protrusion 121 is clamped in the first limiting groove 22, and the insulator is prevented from being pulled out after being installed; the second limiting groove 211 is arranged in the middle of the center hole 21, and the limiting table 34 of the center sleeve 3 is clamped in the second limiting groove 211, so that the center sleeve 3 is further prevented from being pulled out.

[0023] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. An SMA female connector comprising a housing, an insulator and a center sleeve, the insulator is disposed inside the housing, the center sleeve is disposed inside the insulator, characterized in that: The outer wall of the upper end of the shell is provided with external threads, and the outer wall of the lower end is flat. The inside of the shell is provided with a blind hole for placing an insulator. The middle part of the insulator is provided with a center hole which is a stepped hole with a smaller front end and a larger rear end. A center sleeve is placed in the center hole. The center sleeve includes an electrical contact part at the front end, an electrical wire fixing part at the middle part, and an electrical wire clamping part at the rear end. A limiting platform is provided between the electrical wire fixing part and the electrical wire clamping part. The electrical contact part is a plurality of annular arrayed connecting pieces with gaps between adjacent connecting pieces. The electrical wire fixing part and the limiting platform are both cylindrical. The outer diameter of the electrical wire fixing part is smaller than that of the limiting platform. The center sleeve is made by one-piece stamping process.

2. The SMA female connector of claim 1, wherein, The electrical contact part wraps the male electrical contact part inside.

3. The SMA female connector of claim 1, wherein, The front end of the electrical contact part is flush with the front end of the insulator. The front end of the connecting piece extends outward to form a horn shape.

4. The SMA female connector of claim 1, wherein, The middle part of the blind hole is provided with a protrusion, and the middle part of the insulator is provided with a first limiting groove matched with the protrusion.

5. The SMA female connector of claim 1, wherein, The middle part of the center hole is provided with a second limiting groove, and the limiting platform is placed in the second limiting groove.

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