CN213989485U

CN213989485U - Radio frequency connector

Info

Publication number: CN213989485U
Application number: CN202023165090.XU
Authority: CN
Inventors: 党志南
Original assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-08-17
Anticipated expiration: 2030-12-23

Abstract

The utility model provides a radio frequency connector, including be used for with outside coaxial cable electric connection's external structure with install the end face structure in the external structure front end, end face structure includes the column outer conductor with coaxial cable's outer conductor electric connection for with coaxial cable's inner conductor electric connection and along the inner conductor that the axis of the centre of the circle of this outer conductor set up, end face structure's outer conductor provides a terminal surface, and this terminal surface is equipped with annular groove and separates this terminal surface for interior step and outer step, and this annular groove is provided with flexible electrically conductive piece. The radio frequency connector is small in structure size, strong in universality, good in grounding shielding testing effect, small in testing error and suitable for large-batch testing.

Description

Radio frequency connector

Technical Field

The utility model relates to the field of communication technology, concretely relates to radio frequency connector.

Background

Radio frequency technology is widely applied to various fields such as televisions, broadcasting, mobile phones, radars, automatic identification systems and the like, and products with the radio frequency function are subjected to a series of radio frequency signal index tests before being manufactured, delivered and used. At present, in a connector used for testing microstrip line radio frequency signals on a PCB, the grounding surface of an outer conductor has various forms, such as a plane type, an injection molding metal sheet salient point type, an elastic reed type, an elastic pin type and the like. The outer conductor of the connectors in two forms of a plane type and an injection molding metal sheet salient point type is provided with an elastic buffer structure, the grounding end face of the connector can be designed to be smaller, but the compression amount of the grounding elastic buffer section of the connector can introduce the deviation of the test standing wave. The outer conductors of the elastic reed type and elastic pin type connectors are integrally designed, the design size of the grounding end face is large, the applicability on products with compact structural space is poor, and the shielding effect is not good. Above-mentioned current multiple test connector all has the not good test error who introduces because of the ground effect of equidimension, influences test accuracy and uniformity, brings great puzzlement for the test in batches.

Disclosure of Invention

The utility model aims at providing a effectual radio frequency connector of ground connection shielding.

In order to achieve the above purpose, the utility model provides the following technical scheme:

a radio frequency connector comprises an external connection structure and an end face structure, wherein the external connection structure is used for being electrically connected with an external coaxial cable, the end face structure is arranged at the front end of the external connection structure, the end face structure comprises a columnar outer conductor and an inner conductor, the columnar outer conductor is electrically connected with an outer conductor of the coaxial cable, the inner conductor is electrically connected with an inner conductor of the coaxial cable and is arranged along the central axis of the outer conductor, the outer conductor of the end face structure provides an end face, the end face is provided with an annular groove to divide the end face into an inner step and an outer step, and the annular groove is provided with a flexible conductive piece.

In a preferred embodiment, the cross section of the annular groove is in a ladder shape or a gourd shape with a narrow outer part and a wide inner part.

In a preferred embodiment, the flexible conductive member is conductive silicone rubber or conductive nanocarbon material.

Furthermore, the flexible conductive piece is slightly higher than the annular groove.

Preferably, the inner step and the outer step have the same height, so that the common support defines the same connection plane.

In one embodiment, the end face structure is in contact connection with the circuit board, the end face provided by the end face structure is closely attached to the plane of the circuit board, and the inner conductor and the outer conductor of the end face structure are electrically connected with the connection port on the circuit board.

In one embodiment, the end face structure is provided with a clearance gap crossing the inner step and the outer step.

Preferably, the external connection structure comprises an electric connection structure which is coaxial with the end face structure and used for conducting an external coaxial cable to the end face structure, and a flange shell which is sleeved on the electric connection structure.

Furthermore, a telescopic spring is arranged between the electric connection structure and the flange shell, so that the flange shell can be sleeved or exposed on the end face structure in a running manner.

Furthermore, the outer conductor of the end face structure and the flange shell are correspondingly provided with positioning pin holes so as to be fixedly connected through pins.

The utility model provides a beneficial effect that technical scheme brought is:

first, in the radio frequency connector provided by this embodiment, the annular groove is formed in the end surface structure of the radio frequency connector, and the flexible conductive member is arranged in the annular groove, so that the formed end surface structure is integrally designed, the structure is compact, the structure size is small, the contact size between the end surface of the radio frequency connector and the ground plane of the circuit board to be tested can be significantly reduced, the radio frequency connector is suitable for products with compact and loose structure space, the universality of the radio frequency connector is improved, and the test effect is stable.

Secondly, when the radio frequency connector is used for testing a circuit board, the flexible conductive piece can play a role of conductive shielding, and the flexible conductive piece can fill up a contact gap between the test circuit board and the radio frequency connector under elastic compression, so that sufficient contact between the end face and the test circuit board is ensured, an electrical connection effect is ensured, and the purposes of enhancing the shielding effect and the electrical conductivity are achieved.

Furthermore, due to the grounding shielding effect of the radio frequency connector, in the use and test process, the introduced test error is small, the test accuracy and consistency are improved, and a good effect is brought to mass tests.

And thirdly, the service life of the radio frequency connector is prolonged because the flexible conductive piece is replaceable.

Additional aspects and advantages of the present invention will be set forth in part in the description of the specific embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments of the present invention will be briefly described below.

Fig. 1 is a schematic structural diagram of a radio frequency connector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an end face structure according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of an end face structure according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

In this embodiment, as shown in fig. 1, a radio frequency connector includes an external structure 1 electrically connected to an external coaxial cable and an end surface structure 2 installed at a front end of the external structure 1.

The end face structure 2 includes a cylindrical outer conductor 21 electrically connected to an outer conductor of an external coaxial cable, and an inner conductor 22 arranged along a central axis of the cylindrical outer conductor 21 and electrically connected to an inner conductor of the external coaxial cable.

Specifically, referring to fig. 2 and 3, the outer conductor 21 of the end-face structure 2 has an end face 210, the end face 210 is provided with an annular groove 211, the annular groove 211 divides the end face 210 into an outer step 212 and an inner step 213, and the inside of the annular groove 211 is further provided with a flexible conductive member 23.

In this embodiment, the end face structure 2 is provided with a clearance gap 213 spanning the outer step 212 and the inner step 213, and the clearance gap 213 makes the annular groove 211 form a non-closed circular arc annular structure with a gap. Those skilled in the art will appreciate that in other embodiments where no circuitry on the clearance circuit board is required, the end face structure 2 may not have the clearance gap 213, and the annular recess 211 may be in the shape of a closed ring.

As shown in fig. 3, the cross section of the annular groove 211 is a structure with a narrow outside and a wide inside, in this embodiment, the cross section of the annular groove 211 is a trapezoid structure with a narrow top and a wide bottom, in other embodiments, the annular groove 211 may also be a gourd structure or other similar structures with a narrow top and a wide bottom, which is not limited herein.

The flexible conductive member 23 is made of conductive silicone rubber or conductive nano carbon material, and besides, other known or unknown novel materials can be used as the flexible conductive member 23 of the present invention as long as they are conductive and have a certain elasticity, so in other embodiments, the flexible conductive member 23 can also be made of other materials, such as silver-plated aluminum or silver-plated copper.

The flexible conductive member 23 is in the shape of a strip, and the length and size of the flexible conductive member are matched with those of the annular groove 211 and embedded in the annular groove 211. Specifically, the flexible conductive member 23 is slightly higher than the annular groove 211, the width of the top of the annular groove 211 is smaller than the diameter of the flexible conductive member 23, and when the flexible conductive member 23 is embedded in the annular groove 211, the inner wall surface of the annular groove 211 is tightly attached to the flexible conductive member 23, so that the flexible conductive member 23 can be prevented from naturally sliding out of the annular groove 211. In addition, the width of the bottom of the annular groove 211 is larger than the diameter of the flexible conductive member 23, when the flexible conductive member 23 is embedded in the annular groove 211, a certain space is left in the annular groove 211 and is not filled with the flexible conductive member 23, so that the flexible conductive member 23 can be compressed into the annular groove 211 after being pressed by an external force in the use process of the radio frequency connector.

The inner step 213 is of the same height as the outer step 212 so that the common support defines the same connection plane. The end face can be more smoothly contacted with the plane of the circuit board through the plane, and the end face is tightly attached to the plane of the circuit board under the filling action of the flexible conductive piece.

Referring to fig. 1, the circumscribed structure 1 includes an electrical connection structure 11 and a flange housing 12. The electrical connection junction 11 is disposed coaxially with the end face structure 2 and is configured to conduct an external coaxial cable to the end face structure 2.

The flange housing 12 includes a connecting member 121 for screw locking and fixing and a sleeve 122 for sleeving the electrical connection structure 11. An expansion spring (not marked) is arranged between the flange shell 12 and the electric connection structure 11, and under the elastic action of the expansion spring, the flange shell 12 can be sleeved or exposed on the end surface structure 2 in a running way.

The sleeve 122 of the flange housing 12 is provided with a positioning pin hole 13, the positioning pin hole 13 corresponds to the clearance gap 213 of the end face structure 2, and after the end face structure 2 is squeezed by an external force and retracted into the flange housing 12, the flange housing 12 and the end face structure 2 can be fixedly connected by using a pin through the positioning pin hole 13 and the clearance gap 213. In other embodiments, the end face structure 2 is not provided with the clearance gap 213, and a positioning device matched with the positioning pin hole 13 may be provided in the outer conductor 21 of the end face structure 2, so that after the end face structure 2 is squeezed by an external force and retracted into the flange housing 12, the positioning device is combined with the positioning pin hole 13 of the flange housing 12 to realize the fixed connection between the end face structure 2 and the flange housing 12.

The utility model provides a pair of radio frequency connector for microstrip line radio frequency signal on the test circuit board. In application, the end face structure 2 of the rf connector is in contact connection with a circuit board (not identified), the end face 210 provided by the end face structure 2 is closely attached to the plane of the circuit board, and the inner conductor 22 and the outer conductor 21 of the end face structure 2 are electrically connected to a connection port on the circuit board.

Since the flexible conductive member 23 is higher than the annular groove 211, that is, higher than the end surface 210, the flexible conductive member 23 can form a good ground connection with a tested circuit board when the radio frequency connector is in use. When the flexible conductive member 23 is compressed toward the end surface 210 by an external force, it is in parallel contact with the circuit board, so that the flexible conductive member 23 is compressed to form a shielding ring, thereby achieving an optimal grounding shielding effect.

Since the width of the bottom of the annular recess 211 is larger than the diameter of the flexible conductive member 23, the flexible conductive member 23 can be compressed into the annular recess 211 by external force during the use of the rf connector. The width of the top of the annular groove 211 is smaller than the diameter of the flexible conductive piece 23, so that the inner wall surface of the annular groove 211 is tightly attached to the flexible conductive piece 23, the flexible conductive piece 23 is separated from the annular groove 211 due to no natural sliding in the using process, and the overall test effect is further ensured when the circuit board is tested.

In addition, in the process of testing the circuit board, the radio frequency connector is vertically placed and contacted with the circuit board, and due to the fact that the radio frequency connector deviates from the verticality of the circuit board in the operation process, the end face structure 2 of the radio frequency connector cannot be in parallel contact with the circuit board, and an included angle gap is formed between the radio frequency connector and the circuit board. In the radio frequency connector provided by this embodiment, the flexible conductive member 23 in the end surface structure 2 is higher than the end surface 210 of the end surface structure 2, and has a certain elasticity, and a portion higher than the end surface 210 forms a contact buffer portion, so that the flexible conductive member 23 fills up the included angle gap under elastic compression in the process of testing the circuit board, thereby achieving the purpose of having a good grounding shielding effect when the radio frequency connector tests the circuit board.

The radio frequency connector provided by the utility model has small and simple structure space, can obviously reduce the contact size of the test grounding surface and improve the product universality; meanwhile, the grounding shielding effect of the radio frequency connector can be improved, the test error is avoided, the test accuracy is improved, the test consistency is high, and the radio frequency connector can be applied to mass tests.

The above description is only a preferred embodiment of the invention and is intended to illustrate the technical principles applied. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, and other embodiments formed by any combination of the above-mentioned features or their equivalents may be covered without departing from the spirit of the present invention. For example, the above features and (but not limited to) technical features having similar functions of the invention of the present invention are mutually replaced to form the technical solution.

Claims

1. The utility model provides a radio frequency connector, is including being used for with outside coaxial cable electric connection's external structure and installing the end face structure in external structure front end, the end face structure include with coaxial cable's outer conductor electric connection's column outer conductor for with coaxial cable's inner conductor electric connection and along the inner conductor of the central axis setting of this outer conductor, its characterized in that: the outer conductor of the end face structure provides an end face, the end face is provided with an annular groove which divides the end face into an inner step and an outer step, and the annular groove is provided with a flexible conductive piece.

2. The radio frequency connector of claim 1, wherein: the section of the annular groove is in a ladder shape or a gourd shape with a narrow outer part and a wide inner part.

3. The radio frequency connector of claim 1, wherein: the flexible conductive piece is conductive silicon rubber or a conductive nano carbon material.

4. The radio frequency connector of claim 1, wherein: the flexible conductive piece is slightly higher than the annular groove.

5. The radio frequency connector of claim 1, wherein: the inner step and the outer step have the same height, so that the common support defines the same connecting plane.

6. The radio frequency connector of claim 1, wherein: the end face structure is in contact connection with the circuit board, the end face provided by the end face structure is closely attached to the plane of the circuit board, and the inner conductor and the outer conductor of the end face structure are electrically connected with the connecting port on the circuit board.

7. The radio frequency connector of claim 1, wherein: and the end face structure is provided with a clearance gap crossing the inner step and the outer step.

8. The radio frequency connector according to any one of claims 1 to 7, wherein: the external structure comprises an electric connection structure and a flange shell, wherein the electric connection structure is coaxially arranged with the end face structure and used for conducting an external coaxial cable to the end face structure, and the flange shell is sleeved on the electric connection structure.

9. The radio frequency connector of claim 8, wherein: and a telescopic spring is arranged between the electric connection structure and the flange shell so that the flange shell can be sleeved or exposed on the end face structure in a running way.

10. The radio frequency connector of claim 9, wherein: the outer conductor of the end face structure and the flange shell are correspondingly provided with positioning pin holes so as to be fixedly connected through pins.