Female head structure of SMA radio frequency coaxial connector and connector assembly

Abstract

The utility model provides a female joint structure of an SMA radio frequency coaxial connector and a connector assembly, and relates to the technical field of radio frequency connectors, the female joint structure comprises a female joint housing, the inner side of the inner wall of the female joint housing is provided with at least two groups of limiting parts, each group of limiting parts comprises at least three convex structures which are uniformly distributed in a ring shape, and the two groups of limiting parts are arranged at intervals; the female head insulator is inserted into the female head shell and is in compression fit with the convex structure; the female head center conductor is inserted into the female head insulator; the problem that in the prior art, when a female head structure of an SMA radio frequency coaxial connector is welded to a circuit board, a gap is formed between a female head insulator and a female head shell due to thermal expansion and cold contraction, and then a female head center conductor at the welding position is prone to being damaged when the female head structure is rotationally connected with a male head structure of the SMA radio frequency coaxial connector is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of radio frequency connectors, and more specifically, relates to a female head structure of an SMA radio frequency coaxial connector and a connector assembly. Background Art

[0002] With the rapid development of mobile communications, SMA RF coaxial connectors are widely used to connect RF ports and test instruments in communication systems due to their threaded structure, stable connection, and excellent shielding performance. In this application, the female connector of the SMA RF coaxial connector is first soldered to the PCB rigid circuit board on which the chip is mounted to connect the chip's RF port. A dedicated torque wrench is then used to rotate the male connector leading from the test instrument to the female connector soldered to the PCB rigid circuit board. This connects the chip's RF port to the test instrument, facilitating testing of the chip's RF performance.

[0003] The female connector of an SMA RF coaxial connector generally consists of three parts: the SMA female housing, the female insulator (insulator) made of insulating material, and the SMA female center conductor. The female insulator is often made of polytetrafluoroethylene (PTFE). Although PTFE has excellent temperature resistance and can be used in environments ranging from -180°C to 260°C, it still exhibits slight deformation due to thermal expansion and contraction. During the heating process when soldering the female connector to the rigid PCB, the high temperatures experienced cause the PTFE female insulator to expand and adhere to the inner wall of the SMA female housing. After soldering, the female insulator contracts as it cools, creating a gap between the female insulator and the inner wall of the SMA female housing. This gap can cause the female insulator to wobble when rotating the male connector. This wobble increases the relative friction between the SMA center conductor of the female connector and the male connector, causing the SMA female center conductor to twist and wobble, which can easily damage the SMA center conductor at the solder joint. A damaged female connector will cause deterioration of electrical performance, increased loss, shielding leakage and other problems. In severe cases, it will cause signal interruption and direct failure. In addition, the female and male connectors of the connector need to be frequently disassembled and assembled during application due to the need for RF chip debugging, which further increases the damage rate. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies in the prior art and provide a female connector structure and connector assembly of an SMA RF coaxial connector, thereby solving the problem in the prior art that when the female connector structure of the SMA RF coaxial connector is soldered to a circuit board, a gap is formed between the female connector insulator and the female connector housing due to thermal expansion and contraction, which in turn easily causes damage to the female connector center conductor at the welding point when the female connector structure is rotated and connected to the male connector structure of the SMA RF coaxial connector.

[0005] In order to achieve the above object, the utility model provides a female connector structure of an SMA radio frequency coaxial connector, comprising:

[0006] A female housing, wherein the inner wall of the female housing is provided with at least two groups of limiting components, each group of the limiting components includes at least three protrusion structures evenly distributed in an annular shape, and the two groups of the limiting components are spaced apart;

[0007] a female insulator, the female insulator being inserted into the female housing and press-fitted with the protruding structure;

[0008] A female connector center conductor is inserted into the female connector insulator.

[0009] Optionally, the female head shell and the protruding structure are integrally formed.

[0010] Optionally, an external thread is provided on the outer side of the female housing.

[0011] Optionally, the female connector housing is made of metal.

[0012] Optionally, the protruding structure is a wedge-shaped block.

[0013] Optionally, the tip of the wedge block faces the direction of the female insulator being installed into the female housing.

[0014] Optionally, each group of limiting components includes four protruding structures evenly distributed along the inner circumference of the female connector housing.

[0015] Optionally, the female insulator is made of polytetrafluoroethylene.

[0016] The utility model also provides a connector assembly, comprising a male head structure of an SMA radio frequency coaxial connector and the female head structure of the above-mentioned SMA radio frequency coaxial connector.

[0017] Optionally, the male structure of the SMA RF coaxial connector includes a male shell, a male insulator and a male center conductor. The male shell can be threadedly connected to the female shell, and the male center conductor can be plugged into and matched with the female center conductor.

[0018] The present invention provides a female head structure and connector assembly of an SMA radio frequency coaxial connector, which has the following beneficial effects: the female head structure of the SMA radio frequency coaxial connector is provided with at least two sets of limiting components on the inner side of the inner wall of the female head shell, and the convex structure on the inner side of the inner wall of the female head shell is pressed and matched with the outer periphery of the female head insulator through the limiting components, that is, after the female head insulator is installed in the female head shell, the female head insulator is in close contact with the convex structure, so that when the female head structure of the SMA radio frequency coaxial connector is welded to the circuit board, the female head insulator is heated and expanded, and the convex structure is pressed and matched with the outer periphery of the female head insulator. The arrangement can limit the expansion of the female insulator and maintain a tight fit with the female insulator after the female insulator shrinks cold, and can form an axial and radial limiting effect on the female insulator. In this way, when the female structure of the SMA RF coaxial connector is connected to the male structure of the SMA RF coaxial connector rotatably connected thereto, the female insulator will not shake, and the female center conductor will not twist and shake along with the male center conductor, which can avoid damage to the female center conductor at the welding point and improve the service life of the female structure of the SMA RF coaxial connector.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0021] Figure 1 A partial schematic diagram of a female connector structure of an SMA radio frequency coaxial connector according to an embodiment of the present utility model is shown.

[0022] Figure 2 A cross-sectional schematic diagram of a female connector housing of a female connector structure of an SMA radio frequency coaxial connector according to an embodiment of the present utility model is shown.

[0023] Figure 3 A schematic cross-sectional view of a female connector housing of a female connector structure of an SMA radio frequency coaxial connector according to an embodiment of the present invention is shown.

[0024] Description of reference numerals:

[0025] 1. Female connector housing; 2. Female connector insulator; 3. Female connector center conductor; 4. External thread; 5. Wedge block. DETAILED DESCRIPTION

[0026] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] like Figures 1 to 3 As shown, the utility model provides a female head structure of an SMA radio frequency coaxial connector, comprising:

[0028] The female housing 1 has at least two sets of position-limiting components disposed on the inner side of the inner wall thereof, each set of position-limiting components including at least three protrusions evenly distributed in an annular shape, and the two sets of position-limiting components are spaced apart;

[0029] The female insulator 2 is inserted into the female housing 1 and is tightly fitted with the raised structure;

[0030] The female connector center conductor 3 is inserted into the female connector insulator 2 .

[0031] Specifically, in order to solve the problem in the prior art that the female structure of the SMA RF coaxial connector forms a gap between the female insulator 2 and the female shell 1 due to thermal expansion and contraction when soldered to the circuit board, and then easily causes damage to the female center conductor 3 at the welding point when rotating and connecting with the male structure of the SMA RF coaxial connector; the female structure of the SMA RF coaxial connector provided by the present invention is provided with at least two groups of limiting components on the inner side of the inner wall of the female shell 1, and the convex structure on the inner side of the inner wall of the female shell 1 is pressed and fitted with the outer periphery of the female insulator 2 by the limiting components, that is, after the female insulator 2 is installed in the female shell 1, the female insulator 2 is in close contact with the convex structure, so that the SMA RF coaxial connector can be effectively connected to the female end of the connector. The female structure of the SMA RF coaxial connector is welded to the circuit board so that when the female insulator 2 expands due to heat, the setting of the protruding structure can limit the expansion of the female insulator 2 and still maintain a close fit with the female insulator 2 after the female insulator 2 shrinks cold, and can form an axial and radial limiting effect on the female insulator 2. In this way, when the female structure of the SMA RF coaxial connector is connected to the male structure of the SMA RF coaxial connector that is rotatably connected thereto, the female insulator 2 will not shake, and the female center conductor 3 will not twist and shake with the male center conductor, which can avoid damage to the female center conductor 3 at the welding point and improve the service life of the female structure of the SMA RF coaxial connector.

[0032] Optionally, the female housing 1 and the raised structure are integrally formed.

[0033] Specifically, the raised structure is integrally formed on the inner side of the inner wall of the female head shell 1. During processing, a ring-shaped raised component can be first formed on the inner wall of the female head shell 1, and then part of the raised components between adjacent raised structures can be removed through processing to form at least three ring-shaped evenly distributed raised structures.

[0034] Optionally, an external thread 4 is provided on the outer side of the female housing 1 .

[0035] Specifically, the external thread 4 is configured to cooperate with the internal thread on the inner side of the male shell of the male structure of the SMA RF coaxial connector when the female structure of the SMA RF coaxial connector is connected to the male structure of the SMA RF coaxial connector.

[0036] Optionally, the female connector housing 1 is made of metal.

[0037] Specifically, the female connector housing 1 is made of metal and is insulated and limited from the female connector center conductor 3 by the female connector insulator 2 .

[0038] Optionally, the protruding structure is a wedge-shaped block 5 .

[0039] Specifically, the protruding structure adopts a wedge-shaped block 5, which is thin at one end and thick at the other end. The thinner end forms a tip, and by installing the female insulator 2, the thicker end is beneficial to improving the limiting effect of the female insulator 2.

[0040] Optionally, the tip of the wedge block 5 faces the direction of inserting the female connector insulator 2 into the female connector housing 1 .

[0041] Specifically, the wedge block 5 forms a small angled slope from its tip to the other end, which guides the insertion of the female insulator 2 into the female housing 1 and facilitates the installation of the female insulator 2.

[0042] In this embodiment, the tips of the wedge blocks 5 of at least two groups of limiting components face the same direction.

[0043] Optionally, each set of limiting components includes four protruding structures evenly distributed along the inner circumference of the female connector housing 1 .

[0044] Specifically, the four protruding structures are evenly distributed along the inner side of the inner wall of the female connector housing 1 and are arranged opposite to each other in pairs, so as to achieve the positioning of the four sides of the female connector insulator 2 and improve the positioning effect.

[0045] In this embodiment, the protruding structures in the two groups of limiting components are arranged in a one-to-one correspondence along the axial direction of the female connector housing 1 .

[0046] Optionally, the material of the female insulator 2 is polytetrafluoroethylene.

[0047] The utility model also provides a connector assembly, comprising a male head structure of an SMA radio frequency coaxial connector and the female head structure of the above-mentioned SMA radio frequency coaxial connector.

[0048] Specifically, by welding the female structure of the above-mentioned SMA RF coaxial connector on a circuit board with a chip, and by cooperating the male structure of the SMA RF coaxial connector with the female structure of the above-mentioned SMA RF coaxial connector, the connection of the connector assembly and signal transmission can be achieved.

[0049] Optionally, the male structure of the SMA RF coaxial connector includes a male shell, a male insulator and a male center conductor. The male shell can be threadedly connected to the female shell 1, and the male center conductor can be plugged into and matched with the female center conductor 3.

[0050] Specifically, the male shell of the male structure of the SMA RF coaxial connector is threadedly connected to the female shell 1 of the female structure of the above-mentioned SMA RF coaxial connector, and the male center conductor is rotated and inserted into the interior of the female center conductor 3 to achieve electrical connection. In this process, since the female insulator 2 is clamped by at least three protrusion structures evenly distributed along the inner wall of the female shell 1, the radial position of the female insulator 2 is stable and cannot rotate. Therefore, the position of the female center conductor 3 is stable and will not twist or shake with the male center conductor, which can avoid damage to the female center conductor 3 at the welding point and improve the reliability and service life of the connector assembly.

[0051] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A female connector structure of an SMA radio frequency coaxial connector, characterized in that: include: A female housing, wherein the inner wall of the female housing is provided with at least two groups of limiting components, each group of the limiting components includes at least three protrusion structures evenly distributed in an annular shape, and the two groups of the limiting components are spaced apart; a female insulator, the female insulator being inserted into the female housing and press-fitted with the protruding structure; A female connector center conductor is inserted into the female connector insulator.

2. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: The female head shell and the protruding structure are integrally formed.

3. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: The outer side of the female head shell is provided with an external thread.

4. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: The female connector housing is made of metal.

5. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: The protruding structure is a wedge-shaped block.

6. The female connector structure of the SMA RF coaxial connector according to claim 5, characterized in that: The tip of the wedge block faces the direction in which the female insulator is installed into the female housing.

7. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: Each set of limiting components includes four protruding structures evenly distributed along the inner circumference of the female head shell.

8. The female connector structure of the SMA RF coaxial connector according to claim 1, characterized in that: The female insulator is made of polytetrafluoroethylene.

9. A connector assembly, characterized in that: It comprises a male head structure of an SMA radio frequency coaxial connector and a female head structure of an SMA radio frequency coaxial connector according to any one of claims 1 to 8.

10. The connector assembly according to claim 9, wherein: The male structure of the SMA RF coaxial connector includes a male shell, a male insulator and a male center conductor. The male shell can be threadedly connected to the female shell, and the male center conductor can be plugged into and matched with the female center conductor.

Images