Elastic radio frequency coaxial electric connector

Abstract

The invention relates to an elastic radio frequency coaxial electric connector, which comprises a first shell, a second shell, a grounding ring, a first elastic piece, a second elastic piece, an insulator and a central conductor, and is characterized in that a first guide hole is formed in the first shell, the grounding ring is sleeved at one end of the first guide hole, and the insulator is sleeved at the other end of the first guide hole; the second shell is sleeved at the other end of the first guide hole, the first elastic piece is arranged between the first shell and the grounding ring, a second guide hole is formed in the second shell, the insulator is sleeved in the second guide hole, the central conductor penetrates through the insulator, and the second elastic piece is clamped and plugged between the central conductor and the insulator. By adopting the technical scheme provided by the invention, the first elastic piece and the second elastic piece enable the grounding ring or the cap head to float along the axial direction of the electric connector, so that the assembly tolerance of the electric connector is greatly improved, and the electric connector can be assembled more easily, stably and reliably.

Description

Technical Field

[0001] The invention belongs to the technical field of electric connectors, and in particular relates to an elastic radio frequency coaxial electric connector. Background Art

[0002] With the development of communication technology, the integration degree of modules is getting higher and higher, and the size of various microwave communication devices, mobile communication devices, precision test instruments and other equipment is becoming increasingly small and miniaturized. Therefore, higher requirements are also put forward for coaxial connectors used in these devices, especially for high-density installation of RF coaxial connectors for RF interconnection between PCB boards. The RF coaxial connector, referred to as RF connector for short, is an electromechanical component that can achieve fast connection and separation, and adopts a coaxial transmission line structure.

[0003] Existing coaxial connectors usually include a base plate connector, a gusset plate connector and a transfer rod, wherein the two opposite ends of the transfer rod are respectively connected to the base plate connector and the gusset plate connector. The base plate connector and the gusset plate connector are collectively referred to as board-end connectors, and both adopt a universal elastic contact design. However, due to the low strength of the elastic end of the contact, it is easy for the contact to wear or damage during use, and such contact damage is difficult to detect in the subsequent inspection process, thereby reducing the yield of the product.

[0004] In addition, when the board-end connector of the traditional RF coaxial connector is welded to the corresponding PCB board, in order to avoid welding defects such as cold welding, air holes, and empty welding when the board-end connector is welded to the PCB board, it is necessary to design a welding process groove at the board-end connector to ensure the welding reliability of the board-end connector. However, due to the existence of the welding process groove, not only the process requirements are relatively high, which increases the design cost, but also it will cause a large RF leakage at the board-end connector, thereby reducing the electromagnetic compatibility performance of the connector.

[0005] In the prior art, the patent document with the publication number of "CN105098542B" discloses a radio frequency coaxial connector, including an outer conductor, a base, a dielectric body and an inner conductor, wherein the dielectric body is fastened in the outer conductor, one end of the inner conductor is fixed to the outer conductor through the dielectric body, and the other end is located in the base, the inner conductor includes a body, a floating part, a connecting tube and a plurality of elastic spring wires, the body is fastened in the dielectric body, the floating part is connected to the body through the connecting tube, the opposite ends of the elastic spring wire are respectively fixed to the body and the floating part to establish a path for radio frequency signal transmission, the elastic spring wire is elastically deformed to achieve position tolerance compatibility in the horizontal direction and the height direction, the floating part is located in the base, and deflects to calibrate the radial eccentricity of the radio frequency coaxial connector. However, the floating part in the above patent document can only eliminate the radial eccentricity of the coaxial connector, and the axial direction of the coaxial connector is composed of rigid parts, so that the axial assembly tolerance of the connector is low. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a flexible radio frequency coaxial electrical connector.

[0007] The present invention provides an elastic radio frequency coaxial electrical connector, comprising a first shell, a second shell, a grounding ring, a first elastic member, a second elastic member, an insulator, a center conductor and a cap head, wherein a first guide hole is provided in the first shell, the grounding ring is sleeved on one end of the first guide hole, the second shell is sleeved on the other end of the first guide hole, the first elastic member is arranged between the first shell and the grounding ring, a second guide hole is provided in the second shell, the insulator is sleeved in the second guide hole, the center conductor and the cap head are both sleeved in the insulator, and the second elastic member is clamped between the center conductor and the cap head, and between the center conductor and the grounding ring.

[0008] The elastic RF coaxial electrical connector also includes a limiting sleeve, which is clamped between the first elastic member and the second shell. The limiting sleeve is also fixedly connected to one end of the spring leaf, and the other end of the spring leaf extends into the grounding ring. The insulator is also sleeved in the limiting sleeve.

[0009] There are multiple reeds, and the multiple reeds are arranged around the insulator at equal intervals.

[0010] The spring sheet and the limiting sleeve are integrally manufactured and formed.

[0011] The first elastic member is a cylindrical helical compression spring.

[0012] The second elastic member is made of wound metal wire.

[0013] The number of the insulators is two, and the two insulators are respectively arranged at the front and rear ends of the second guide hole.

[0014] The first shell is in the shape of a hexagonal prism as a whole.

[0015] The surface of the second shell is also provided with external threads.

[0016] The end of the cap head is in a semi-spherical shape.

[0017] The beneficial effect of the present invention is that: by adopting the technical solution provided by the present invention, the first elastic member enables the grounding ring to float along the axial direction of the electrical connector, and the second elastic member enables the cap head to float along the axial direction of the electrical connector, thereby greatly improving the assembly tolerance of the present invention, so that the present invention can be assembled more easily, stably and reliably. In addition, the first shell and the second shell also have the function of shielding external electromagnetic interference, so that the signal can be stably transmitted via the center conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the present invention;

[0019] Figure 2 It is a schematic diagram of the connection between the limit sleeve and the spring leaf of the present invention;

[0020] Figure 3 is an axonometric view of the first housing of the present invention;

[0021] Figure 4 It is an axonometric view of the second housing of the present invention.

[0022] In the figure: 1-first shell, 2-second shell, 3-grounding ring, 4-first elastic member, 5-second elastic member, 6-insulator, 7-center conductor, 8-first guide hole, 9-second guide hole, 10-limiting sleeve, 11-spring, 12-boss, 13-clamping surface, 14-cap head. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below in conjunction with the accompanying drawings, but the claimed protection scope is not limited to the above;

[0024] The present invention provides a flexible radio frequency coaxial electrical connector, such as Figures 1 to 4As shown, it includes a first shell 1, a second shell 2, a grounding ring 3, a first elastic member 4, a second elastic member 5, an insulator 6, a center conductor 7 and a cap head 14. The first shell 1 is provided with a first guide hole 8, the grounding ring 3 is sleeved on one end of the first guide hole 8, the second shell 2 is sleeved on the other end of the first guide hole 8, the first elastic member 4 is arranged between the first shell 1 and the grounding ring 3, the second shell 2 is provided with a second guide hole 9, the insulator 6 is sleeved in the second guide hole 9, the center conductor 7 and the cap head 14 are both sleeved in the insulator 6, and the second elastic member 5 is clamped between the center conductor 7 and the cap head 14, and between the center conductor 7 and the grounding ring 3.

[0025] By adopting the technical solution provided by the present invention, the first elastic member enables the grounding ring to float along the axial direction of the electrical connector, and the second elastic member enables the cap head to float along the axial direction of the electrical connector, thereby greatly improving the assembly tolerance of the present invention, making the present invention easier, more stable and more reliable to assemble. In addition, the first shell and the second shell also have the function of shielding external electromagnetic interference, so that the signal can be stably transmitted via the center conductor. By adopting the technical solution of the present invention, when assembling the electrical connector, the assembly and disassembly of the electrical connector as a whole and other components is more convenient and more flexible.

[0026] Specifically, the elastic RF coaxial electrical connector also includes a limiting sleeve 10, which is clamped between the first elastic member 4 and the second housing 2. The limiting sleeve 10 is also fixedly connected to one end of a spring 11, and the other end of the spring 11 extends into the grounding ring 3. The insulator 6 is also sleeved in the limiting sleeve 10. There are multiple springs 11, and the multiple springs 11 are arranged around the insulator 6 at equal intervals. A boss 12 is also provided at the end of the spring 11, and the boss 12 abuts against the inner surface of the grounding ring 3. By adopting the technical solution of the present invention, the first elastic member 4, the second elastic member 5 and the spring 11 are all elastic, so that the grounding ring or the cap head can float along the axial direction of the electrical connector, thereby greatly improving the assembly tolerance.

[0027] In addition, a pair of clamping surfaces 13 are respectively provided on the left and right sides of the first housing 1, the second housing 2 and the limiting sleeve 10, and the pair of clamping surfaces 13 are opposite to each other. The spring 11 and the limiting sleeve 10 are integrally manufactured. Therefore, relative rotation does not occur between the first housing 1 and the spring 11, and between the second housing 2 and the spring 11.

[0028] Preferably, the first elastic member 4 is a cylindrical helical compression spring. The second elastic member 5 is made of a metal wire. The number of insulators 6 is two, and the two insulators 6 are arranged at the front and rear ends of the second guide hole 9. The first shell 1 is in the shape of a hexagonal prism as a whole. The surface of the second shell 2 is also provided with an external thread. The end of the cap head 14 is in the shape of a semi-spherical surface.

Claims

1. A flexible radio frequency coaxial electrical connector, characterized in that: The invention comprises a first shell (1), a second shell (2), a grounding ring (3), a first elastic member (4), a second elastic member (5), an insulator (6), a center conductor (7) and a cap (14); the first shell (1) is provided with a first guide hole (8); the grounding ring (3) is fitted on one end of the first guide hole (8); the second shell (2) is fitted on the other end of the first guide hole (8); the first elastic member (4) is arranged between the first shell (1) and the grounding ring (3); the second shell (2) is provided with a second guide hole (9); the insulator (6) is fitted in the second guide hole (9); the center conductor (7) and the cap (14) are both fitted in the insulator (6); and the second elastic member (5) is clamped between the center conductor (7) and the cap (14), and between the center conductor (7) and the grounding ring (3).

2. The flexible radio frequency coaxial electrical connector according to claim 1, characterized in that: The elastic radio frequency coaxial electrical connector also includes a limiting sleeve (10), which is clamped between the first elastic member (4) and the second housing (2), and the limiting sleeve (10) is also fixedly connected to one end of a spring sheet (11), and the other end of the spring sheet (11) extends into the grounding ring (3), and the insulator (6) is also sleeved in the limiting sleeve (10).

3. The elastic radio frequency coaxial electrical connector according to claim 2, characterized in that: There are a plurality of reed sheets (11), and the plurality of reed sheets (11) are arranged at equal intervals around the insulator (6).

4. The elastic radio frequency coaxial electrical connector according to claim 2, characterized in that: The spring leaf (11) and the limiting sleeve (10) are integrally manufactured and formed.

5. The elastic radio frequency coaxial electrical connector according to claim 1 or 2, characterized in that: The first elastic member (4) is a cylindrical helical compression spring.

6. The elastic radio frequency coaxial electrical connector according to claim 1, characterized in that: The second elastic member (5) is made of wound metal wire.

7. The elastic radio frequency coaxial electrical connector according to claim 1, characterized in that: The number of the insulators (6) is two, and the two insulators (6) are respectively arranged at the front and rear ends of the second guide hole (9).

8. The elastic radio frequency coaxial electrical connector according to claim 1, characterized in that: The first housing (1) is in the shape of a hexagonal prism as a whole.

9. The elastic radio frequency coaxial electrical connector according to claim 1 or 2, characterized in that: The surface of the second shell (2) is also provided with external threads.

10. The elastic radio frequency coaxial electrical connector according to claim 1, characterized in that: The end of the cap head (14) is in a semi-spherical shape.

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