CN214044209U

CN214044209U - Radio frequency connector for narrow space grounding

Info

Publication number: CN214044209U
Application number: CN202022445723.6U
Authority: CN
Inventors: 刘彩虹
Original assignee: Shanghai Aerospace Science and Industry Appliance Co Ltd
Current assignee: Shanghai Aerospace Science and Industry Appliance Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-08-24
Anticipated expiration: 2030-10-29

Abstract

A radio frequency connector for narrow space grounding comprises a rigid outer conductor, wherein the rigid outer conductor comprises an upper conductor and a lower conductor, a rigid inner conductor is fixed at the middle line inside the upper conductor, a dielectric body is installed inside the lower conductor, an elastic inner conductor is fixed at the center of the dielectric body, the elastic inner conductor is electrically connected with the rigid inner conductor in an inserting mode, a grounding elastic gasket is embedded between the dielectric body and the lower conductor, the grounding elastic gasket comprises an inner ring body, a hard contact piece and an elastic contact piece, the inner ring body is embedded into the bottom surface of the dielectric body, and the outer wall of the inner ring body is provided with contact pieces in an annular array; the contact piece comprises a hard contact piece and an elastic contact piece; the utility model provides a floating ground connection problem in the narrow and small space of radio frequency connector, and produce simple manufacture with low costs, cost that can be minimum reaches the best floating ground connection effect.

Description

Radio frequency connector for narrow space grounding

Technical Field

The utility model belongs to the technical field of electronic components, in particular to a radio frequency connector for narrow and small space ground connection.

Background

The rf connector is typically attached to the rf cable or an electronic component mounted on the instrument as an electrical connection or disconnection element of the transmission line. The rf coaxial connector has various specifications, such as SMA, SMP, SSMP, etc., according to the rf power and transmission frequency.

Since the rf connector needs to be well grounded during use, the rf connector needs to have a grounding device during use. When the elastic inner conductor contact is applied to a radio frequency connector to realize solderless vertical interconnection with a printed board, a good grounding device must be designed to ensure the performance and signal integrity of the product. Due to the limitation of the processing technology of the printed board, the surface of the printed board is uneven, and the phenomenon of warping exists. When the radio frequency connector is vertically interconnected with the printed board without soldering, the tail end of the rigid outer conductor has certain tolerance with the printed board, which inevitably causes poor grounding. Due to the trend of miniaturization of interconnection systems, the reserved space for such grounding is generally limited, and therefore a floating grounding device for a narrow space must be invented.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a radio frequency connector for narrow and small space ground connection, and concrete technical scheme is as follows:

a radio frequency connector for narrow space grounding comprises a rigid outer conductor, wherein the rigid outer conductor comprises an upper conductor and a lower conductor, a rigid inner conductor is fixed at the middle line inside the upper conductor, a dielectric body is installed inside the lower conductor, an elastic inner conductor is fixed at the center of the dielectric body, the elastic inner conductor is electrically connected with the rigid inner conductor in an inserting mode, a grounding elastic gasket is embedded between the dielectric body and the lower conductor, the grounding elastic gasket comprises an inner ring body, a hard contact piece and an elastic contact piece, the inner ring body is embedded into the bottom surface of the dielectric body, and the outer wall of the inner ring body is provided with contact pieces in an annular array;

the contact pieces comprise hard contact pieces and elastic contact pieces, the hard contact pieces and the elastic contact pieces are arranged in a staggered mode, the hard contact pieces and the inner ring body are located on the same horizontal plane, the outer walls of the hard contact pieces are in electrical contact with the inner wall of the lower conductor, and the elastic contact pieces are all turned over downwards and extend out of the lower conductor.

Furthermore, a positioning column is arranged at the center of the bottom end of the medium body in a protruding mode, the bottom end of the positioning column is flush with the bottom end of the lower conductor, an annular concave assembly groove is formed in the inner wall of the lower conductor, the assembly groove is flush with the medium body, the inner ring body is sleeved on the positioning column in an interference fit mode, one part of the hard contact piece is arranged on the bottom surface of the medium body, and the other part of the hard contact piece is embedded into the assembly groove.

Furthermore, the overhanging part at the bottom end of the lower conductor is riveted and pressed on the hard contact piece.

Furthermore, the number of the hard contact pieces is the same as that of the elastic contact pieces, at least two elastic contact pieces are arranged, and the hard contact pieces and the elastic contact pieces are fan-shaped.

Furthermore, the angle between the elastic contact piece and the inner ring body is 100-150 degrees, and the length of the lower conductor extending outwards from the elastic contact piece is 0.25 mm.

Furthermore, the outer diameter of the upper conductor is larger than that of the lower conductor, and the elastic inner conductor is fixed in the upper conductor through glass sintering.

The utility model has the advantages that: the elastic contact piece which is turned up outwards can be electrically contacted with the printed board in advance, the grounding requirements of different insertion gaps are met, the hard contact piece can be contacted with the rigid outer conductor, the grounding is more reliable and stable, the floating grounding problem of a narrow space of the radio frequency connector is solved, the production and the manufacture are simple, the cost is low, and the best floating grounding effect can be achieved at the minimum cost.

Drawings

Fig. 1 shows a schematic structural diagram of a radio frequency connector for grounding in a narrow space according to the present invention;

fig. 2 shows a schematic structural view of the elastic gasket of the present invention;

fig. 3 is a schematic diagram illustrating a structure of a grounding portion of the rf connector of the present invention;

fig. 4 shows a schematic view of the internal cross-sectional structure of the lower conductor of the present invention;

shown in the figure: 1. a rigid outer conductor; 11. an upper conductor; 12. a lower conductor; 121. assembling a groove; 2. a dielectric body; 21. a positioning column; 3. an elastic inner conductor; 4. an elastic pad; 41. an inner ring body; 42. a hard contact piece; 43. an elastic contact piece; 5. a rigid inner conductor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

A radio frequency connector for narrow space grounding comprises a rigid outer conductor 1, wherein the rigid outer conductor 1 comprises an upper conductor 11 and a lower conductor 12, a rigid inner conductor 5 is fixed at the middle line inside the upper conductor 11, a dielectric body 2 is installed inside the lower conductor 12, an elastic inner conductor 3 is fixed at the center of the dielectric body 2, the elastic inner conductor 3 is electrically connected with the rigid inner conductor 5 in an inserting manner, a grounding elastic gasket 4 is embedded between the dielectric body 2 and the lower conductor 12,

as shown in fig. 2, the grounding elastic pad 4 includes an inner ring 41, a hard contact piece 42 and an elastic contact piece 43, the inner ring 41 is embedded in the bottom surface of the dielectric body 2, and the outer wall of the inner ring 41 is provided with an annular array of contact pieces; the dielectric body is used for separating the inner conductor and the outer conductor to avoid short circuit caused by contact of the inner conductor and the outer conductor;

the contact pieces comprise hard contact pieces 42 and elastic contact pieces 43, the hard contact pieces 42 and the elastic contact pieces 43 are arranged in a staggered mode, the hard contact pieces 42 and the inner ring body 41 are located on the same horizontal plane, the outer wall of each hard contact piece 42 is electrically contacted with the inner wall of the lower conductor 12, and the elastic contact pieces 43 are all turned over downwards and extend out of the lower conductor 12; the elastic contact piece which is turned outwards can be electrically contacted with the printed board in advance, the grounding requirements of different insertion gaps are met, and the hard contact piece can be contacted with the rigid outer conductor, so that the grounding is more reliable and stable.

As shown in fig. 3, a positioning column 21 is protruded downward from the center of the bottom end of the dielectric body 2, and the bottom end of the positioning column 21 is flush with the bottom end of the lower conductor 12; an annular concave assembly groove 121 is formed in the inner wall of the lower conductor 12, the assembly groove 121 is flush with the dielectric body 2, the inner ring body 41 is sleeved on the positioning column 21 in an interference manner, one part of the hard contact piece 42 is arranged on the bottom surface of the dielectric body 2, and the other part of the hard contact piece is embedded in the assembly groove 121; the height of the positioning column is 0.2mm, short circuit caused by contact of the turned-up elastic contact piece and the elastic inner conductor can be prevented, the separation effect between the contact piece and the medium body is improved, and meanwhile the positioning column is also used as a positioning part of the contact piece.

The overhanging part at the bottom end of the lower conductor 12 is riveted and pressed on the hard contact piece 42; the turnover riveting fixation can ensure that the contact piece can be stably arranged in the lower conductor, and meanwhile, the hard contact piece can be stably electrically contacted with the lower conductor, and the stability of grounding is ensured.

The number of the hard contact pieces 42 is the same as that of the elastic contact pieces 43, at least two elastic contact pieces 43 are arranged, and the hard contact pieces 42 and the elastic contact pieces 43 are fan-shaped; a plurality of elasticity contact pieces can multiple spot position contact printing board, improves the ground effect.

The angle between the elastic contact piece 43 and the inner ring body 41 is 100-150 degrees, and the length of the lower conductor 12 extending outwards from the elastic contact piece 43 is 0.25 mm; the obtuse angle is formed between the elastic contact piece and the inner ring body, the outward movement of the elastic contact piece can be realized, and the larger the compression stroke of the elastic contact piece is, the larger the outer diameter of the elastic contact piece is, and the more no short-circuit risk exists.

The outer diameter of the upper conductor 11 is larger than that of the lower conductor 12, and the elastic inner conductor 3 is fixed in the upper conductor 11 by glass sintering.

The utility model discloses when implementing:

firstly, fixing a rigid inner conductor 5 in an upper conductor 11 of a rigid outer conductor 1 through glass sintering, and installing a dielectric body 2 in a lower conductor 12 of the rigid outer conductor 1 through interference fit; then the elastic inner conductor 3 is fixed in the dielectric body 2 in an interference fit manner, and the elastic inner conductor 3 and the rigid inner conductor 5 are electrically inserted into a whole;

finally, the grounding elastic gasket 4 is clamped at the bottom end of the rigid outer conductor 1 in an interference fit mode, the inner ring body 41 is clamped on the outer wall of the positioning column 21, the hard contact piece 42 is attached to the bottom surface of the medium body 2, the outer end of the hard contact piece is embedded into the assembling groove 121, the hard contact piece 42 is electrically contacted with the lower conductor 12, and the elastic contact piece 43 is turned downwards and extends out of the lower conductor 12; then, the tail end part of the rigid outer conductor 1 is turned over and riveted to fix the hard contact piece 42, so that the grounding elastic gasket 4 is fixed;

and then, the whole radio frequency connector is fixedly arranged in the module, the tail end of the radio frequency connector is flush with the bottom surface of the module, and finally, the whole module and the printed board are connected in a pressing and locking mode in a welding-free vertical mode. Because the elastic contact piece 43 extends out of the tail end of the rigid outer conductor 1, when a certain axial tolerance exists between the module and the printed board, the elastic contact piece 43 is contacted with the printed board before the rigid outer conductor 1, and the elastic contact piece 43 can be continuously compressed and expanded along with the insertion, so that a good grounding effect is achieved;

when the power is supplied, the ground signal of the rigid outer conductor 1 is transmitted to the inner ring 41 through the hard contact piece 42, and then is transmitted to the elastic contact piece 43 again, and the elastic contact piece 43 is electrically contacted with the ground pin of the printed board.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A radio frequency connector for narrow space grounding, characterized in that: the grounding device comprises a rigid outer conductor (1), wherein the rigid outer conductor (1) comprises an upper conductor (11) and a lower conductor (12), a rigid inner conductor (5) is fixed at the central line inside the upper conductor (11), a dielectric body (2) is installed inside the lower conductor (12), an elastic inner conductor (3) is fixed at the center of the dielectric body (2), the elastic inner conductor (3) is electrically connected with the rigid inner conductor (5) in an inserting mode, a grounding elastic gasket (4) is embedded between the dielectric body (2) and the lower conductor (12), the grounding elastic gasket (4) comprises an inner ring body (41), a hard contact piece (42) and an elastic contact piece (43), the inner ring body (41) is embedded into the bottom surface of the dielectric body (2), and the outer wall of the inner ring body (41) is provided with contact pieces in an annular array;

the contact pieces comprise hard contact pieces (42) and elastic contact pieces (43), the hard contact pieces (42) and the elastic contact pieces (43) are arranged in a staggered mode, the hard contact pieces (42) and the inner ring body (41) are located on the same horizontal plane, the outer wall of each hard contact piece (42) is electrically contacted with the inner wall of the lower conductor (12), and the elastic contact pieces (43) are all turned over downwards and extend outwards to the lower conductor (12).

2. A radio frequency connector for grounding in a small space according to claim 1, wherein: the bottom center department of medium body (2) has reference column (21) down to press down, the bottom of reference column (21) and the bottom parallel and level of lower conductor (12), the inner wall of lower conductor (12) is seted up annular assembly groove (121) of indent, assembly groove (121) and medium body (2) parallel and level, inner ring body (41) interference suit is on reference column (21), medium body (2) bottom surface, another part embedding are in assembly groove (121) are arranged in to part of stereoplasm contact piece (42).

3. A radio frequency connector for grounding in a small space according to claim 2, wherein: the bottom end overhanging part of the lower conductor (12) is riveted and pressed on the hard contact piece (42).

4. A radio frequency connector for narrow space grounding according to claim 3, characterized in that: the number of the hard contact pieces (42) is the same as that of the elastic contact pieces (43), at least two elastic contact pieces (43) are arranged, and the hard contact pieces (42) and the elastic contact pieces (43) are fan-shaped.

5. The RF connector of claim 4, wherein: the angle between the elastic contact piece (43) and the inner ring body (41) is 100-150 degrees, and the length of the lower conductor (12) extending outwards from the elastic contact piece (43) is 0.25 mm.

6. A radio frequency connector for grounding in a small space according to claim 1, wherein: the outer diameter of the upper conductor (11) is larger than that of the lower conductor (12), and the elastic inner conductor (3) is fixed in the upper conductor (11) through glass sintering.