CN219554107U - High transmission quality's radio frequency plug connector device - Google Patents

Abstract

The utility model discloses a radio frequency plug connector device with high transmission quality, which comprises a plug connector and a coaxial cable connected to the plug connector, wherein the coaxial cable sequentially comprises at least one central conductor, a dielectric layer and a shielding layer surrounding the outer parts of the central conductor and the dielectric layer, the plug connector at least comprises an inner conductor, an insulating body and a shell conductor, the insulating body is used for insulating and spacing the inner conductor and the shell conductor, the shielding layer of the coaxial cable is electrically connected to the shell conductor of the plug connector, the central conductor of the coaxial cable is electrically connected to the inner conductor of the plug connector, and the shell conductor surrounding the inner conductor is of a sleeve structure manufactured through a metal deep drawing process. Compared with the prior art, the high-transmission-quality radio frequency plug connector device disclosed by the utility model has the advantages that the grounding is more reliable and stable, the noise interference can be effectively shielded, the signal transmission quality is improved, and the signal loss is reduced.

Description

High transmission quality's radio frequency plug connector device

Technical Field

The utility model relates to the technical field of electric connectors for transmitting signals, in particular to a radio frequency plug connector device with high transmission quality applied to automobiles.

Background

In a vehicle-mounted system, in order to connect complex information interaction between the systems, electrical connector devices such as Fakra connectors (Fakra) and Mini Fakra are generally used for radio frequency signal connection of satellite navigation equipment, communication equipment and the like, radio frequency signals with the frequency of more than 4GHz are required to be transmitted, and the problems of noise interference and the like are more likely to occur along with the increasing of future application frequency, so that the transmission quality is affected. Most of the component conductors of the existing connector are realized by adopting a vehicle-mounted part or stamping process, and areas exposed by combining gaps, process notches, slotted holes, slits and the like inevitably exist in the structure, so that the shielding effect is insufficient, radio frequency signals are greatly attenuated when passing through the connector, and particularly when the connector is applied to a complex vehicle-mounted internal system environment, the quality of signal transmission is poor more easily, and finally the effect of transmitting and receiving information of equipment is poor.

On the other hand, if the internal structure is designed to be stepped or irregular in the radial direction, the impedance of the plug connector is also discontinuous, further deteriorating the transmission quality.

Therefore, a feasible technical solution is needed to solve the above technical problems.

Disclosure of Invention

The present utility model is directed to a low cost rf plug connector device that can effectively improve the shielding and grounding effect to ensure high quality signal transmission.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a high transmission quality radio frequency plug connector device comprising a plug connector and a coaxial cable connected to the plug connector, said coaxial cable having in sequence at least a central conductor, a dielectric layer and a shielding layer surrounding the outside of said central conductor and dielectric layer, the plug connector being provided with at least an inner conductor, an insulating body, a housing conductor, the insulating body insulating the inner conductor and the housing conductor apart, the shielding layer of the coaxial cable being electrically connected to the housing conductor of the plug connector, the central conductor of the coaxial cable being electrically connected to the inner conductor of the plug connector,

wherein the shell conductor surrounding the inner conductor is a sleeve structure manufactured through a metal deep drawing process.

Preferably, the front end of the shell conductor is arranged as a contact head for plugging with a counterpart connector, the middle of the shell conductor is arranged as a cylindrical main body for holding and fixing the insulating body, the rear end of the shell conductor is arranged as a connection tail for connecting the coaxial cable, and the connection tail is in press connection with the shielding layer of the coaxial cable.

Preferably, the contact head of the shell conductor is of a substantially cylindrical structure formed by extending axially in a radially outward expanding manner, and an axially extending slot is arranged on an axial end surface of the contact head, so that the contact head forms an elastically deformable contact reed.

Preferably, the connection tail portion of the shell conductor is a cylindrical structure formed by being folded inwards in a radially contracted manner and extending in the axial direction, and has an inner diameter approximately the same as that of the shielding layer of the coaxial cable.

Preferably, the inner radius M of the cylindrical body is smaller than the inner radius T of the corresponding position of the contact head and larger than the inner radius L of the corresponding position of the connection tail, i.e. the inner radius T > the inner radius M > the inner radius L.

Preferably, the difference DV1 between the inner radius T of the corresponding position of the contact head and the inner radius M of the tubular body is equal to the difference DV2 between the inner radius M of the tubular body and the inner radius L of the corresponding position of the connection tail, i.e. difference dv1=difference DV2.

Preferably, the difference DV1 is 1.5 to 3 times the wall thickness d of the housing conductor.

Preferably, an axial limiting part is arranged at the joint between the cylindrical main body and the connecting tail part and used for limiting and stopping the insulating body from moving in the axial direction in the cylindrical main body.

Preferably, the connection tail is introduced into the shielding layer of the coaxial cable from the crimping end of the coaxial cable, and is crimped and fixed into a whole by a riveting copper pipe after overlapping a part of the shielding layer.

Preferably, the connecting tail is positioned between the shielding layer and the dielectric layer of the coaxial cable, and the riveted copper pipe is a hexagonal copper pipe.

Preferably, the connection tail is provided with at least one tail recess groove for reinforcing the press-fit fixation with the shielding layer of the coaxial cable.

Preferably, the shielding layers of the coaxial cable are two layers, are arranged in an adjacent and overlapped mode, and the connecting ends of the shielding layers are extruded and fixed by the riveted copper tubes.

Preferably, the coaxial cable further comprises a rubber sleeve sleeved and fixed outside the shell conductor, and the connecting tail part is led into the shielding layer of the coaxial cable from the crimping end of the coaxial cable to the end face of the rubber sleeve.

Preferably, the housing further comprises an outer rubber shell and a lock catch, wherein the outer rubber shell is provided with a containing cavity for receiving the housing conductor, the rubber sleeve comprises at least one flange, and the flange is matched with the lock catch to lock the rubber sleeve in the outer rubber shell so as to maintain the axial position of the housing conductor in the containing cavity.

Preferably, the inner conductor is formed by a stamping and rounding process.

Preferably, one end of the inner conductor is crimped with the center conductor of the coaxial cable.

The utility model has the beneficial effects that:

1. the integrated shell conductor manufactured by the stretch forming process is of a full-shielding closed structure, is more reliable and stable in grounding, can effectively shield noise interference, improves signal transmission quality and reduces signal loss.

2. According to the structure of the shell conductor, a plurality of conductor parts are not needed to be arranged in a multi-section mode, only a single shell conductor is needed, the connecting tail portion of the shell conductor is directly connected with the shielding layer of the cable in a pressure welding mode, the compensation characteristic of the cylindrical inner diameter of the shell conductor is set, the compensation capacitor and the inductance characteristic are added, the purpose of impedance matching is achieved, the signal reflection effect is improved, and the signal transmission quality is further improved.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model;

FIG. 2 is an exploded view of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of an embodiment of the present utility model;

FIG. 4 is a schematic view of a housing conductor according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a housing conductor according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram showing the comparison of the inner radii and the difference between the contact head, the cylindrical body and the connection tail of the shell conductor according to the embodiment of the present utility model;

FIG. 7 is a schematic perspective view of an embodiment of the present utility model (without the outer housing and the latch);

fig. 8 is a schematic view of the ground path of an outer conductor of the prior art (shown in phantom);

FIG. 9 is a schematic view of the ground path of a shell conductor (shown in phantom) according to an embodiment of the utility model;

fig. 10 is a graph of transmission quality performance test results for a FAKRA connector of a prior art example;

FIG. 11 is a diagram of the transmission quality performance test results according to an embodiment of the present utility model;

reference numerals in the drawings of the specification include:

the radio frequency plug connector device with high transmission quality comprises a radio frequency plug connector device 100, a plug connector 200, an inner conductor 210, an insulating body 220, a shell conductor 230, a contact head 231, a slot 231A, a contact reed 231B, a cylindrical main body 232, a connection tail 233, a tail concave ring groove 233A, an axial limiting part 234, a riveted copper pipe 240, a rubber sleeve 250, a flange 251, an outer rubber shell 260, a containing cavity 261, a lock catch 270, a coaxial cable 300, a central conductor 310, a dielectric layer 320 and a shielding layer 330.

Detailed Description

The embodiment of the utility model solves the technical problems of insufficient shielding effect, poor signal transmission quality, discontinuous impedance caused by sectional fluctuation change of an internal structure in the radial direction and further deterioration of transmission quality caused by the fact that the exposed areas such as gaps, notches and notches exist on the structure of the outer conductor in the prior art by providing the radio frequency plug connector device with high transmission quality.

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.

The terms front, rear, left, right, upper, lower, left, right, longitudinal, transverse, axial, radial, front, back, etc. are relative terms.

Fig. 1 illustrates a high transmission quality rf plug connector device 100 formed in accordance with an exemplary embodiment, the high transmission quality rf plug connector device 100 comprising: a plug connector 200 and a coaxial cable 300 connected to the plug connector 200. As shown in fig. 2 and 3, the coaxial cable 300 sequentially has at least one central conductor 310, a dielectric layer 320 and a shielding layer 330 surrounding the central conductor 310 and the dielectric layer 320, the plug connector 200 is provided with at least an inner conductor 210, an insulating body 220 and a shell conductor 230, wherein the insulating body 220 insulates and separates the inner conductor 210 and the shell conductor 230, the shielding layer 330 of the coaxial cable 300 is electrically connected to the shell conductor 230 of the plug connector 200, the central conductor 310 of the coaxial cable 300 is electrically connected to the inner conductor 210 of the plug connector 200, the inner conductor 210 is formed by an exemplary stamping and rounding process, the inner conductor 210 is provided with a mating part plugged with a conductive terminal of the counterpart connector, the mating part can be a funnel-shaped guiding port, and a terminating part connected with the central conductor 310 of the coaxial cable 300 is formed by bending and curling at two sides of a forming substrate of the inner conductor 210, and the central conductor 310 of the coaxial cable 300 is crimped with the inner conductor 210 by the curling structure of the terminating part to realize mechanical and electrical connection.

The shell conductor 230 surrounding the inner conductor 210 is a sleeve structure made by a metal deep drawing process, namely, an integral structure, and does not have copper pipes connected in a sectional manner as in the conventional scheme. It can be appreciated that the shell conductor 230 is an integrally formed cylindrical structure with full-screen closure without any gaps, notches, slots, etc., and can form a continuous and uninterrupted reference ground outside the inner conductor 210 for signal transmission, so that the ground shield is more reliable and stable, noise interference is more effectively shielded, signal transmission quality is improved, and signal loss is reduced.

Referring to fig. 4 with emphasis, in fig. 4, a dotted line Y is set as an axial direction, and the case conductor 230 is provided with: at the front end is a contact head 231 for mating with a counterpart connector, a cylindrical body 232 provided therebetween for holding the fixed insulating body 220, and a connection tail 233 provided at the rear end for connecting the coaxial cable 300, the connection tail 233 being for crimping with the shielding layer 330 of the coaxial cable 300. The contact head 231 of the shell conductor 230 has a substantially cylindrical structure formed by extending in the axial direction in a radially outward expanding manner, and a slot 231A extending in the axial direction is provided on an axial end surface thereof, so that the contact head 231 forms an elastically deformable contact spring 231B. The grooves 231A are preferably uniformly arranged along the circumferential direction of the contact head 231, and the number of the grooves 231A is not limited in the present utility model, and more than 2 grooves are within the scope of the present utility model. The contact head 231 is divided into a plurality of elastically deformable contact spring pieces 231B by a plurality of grooves 231A, when the shell conductor 230 is matched with the counterpart connector (not shown in the figure, and can be mutually plugged and matched with the radio frequency plug connector of the utility model to realize electric connection), the contact spring pieces 231B are compressed due to extrusion when entering the counterpart connector, and after entering, the contact spring pieces 231B are opened, so that the shell conductor 230 and a conductive shell (not shown in the figure) of the counterpart connector keep good elastic contact, stable electric connection of a ground potential is realized, and the radio frequency performance is ensured.

As shown in fig. 5 and 7, the connection tail 233 of the shell conductor 230 has a cylindrical structure that is folded inward in a radially narrowed manner and extends in the axial direction, and the connection tail 233 has an inner diameter that is approximately the same as the inner diameter of the shielding layer 330 of the coaxial cable 300. In this way, sufficient contact of the connection tail 233 with the shield layer 330 of the coaxial cable 300 can be ensured, and the connection transition between the connection tail 233 of the outer shell conductor and the shield layer 330 can be maintained substantially uniform in radial dimension, without structurally degrading radio frequency performance by possible connection discontinuity, irregular abrupt changes, or structural relief changes, as compared to the prior art. When the shell conductor 230 is assembled with the shielding layer of the coaxial cable, the exposed shielding layer 330 and the connection tail 233 are inserted in a predetermined manner, the connection tail 233 is introduced into the shielding layer 330 of the coaxial cable 300 from the crimping end of the coaxial cable 300, at this time, the connection tail 233 is located between the shielding layer 330 and the dielectric layer 320 of the coaxial cable 300, and the overlapped parts thereof are tightly adhered to each other, and then are crimped and fixed together by the riveting copper tube 240, and the riveting copper tube 240 is crimped into a polygonal shape, preferably a hexagonal copper tube, by the crimping jig, so as to provide a more reliable clamping connection. The connection tail 233 is provided with at least one tail concave groove 233A, and the friction force between the joint surfaces is increased by the tail concave groove 233A, so that the crimping fixing strength between the connection tail 233 and the shielding layer 330 of the coaxial cable 300 is further improved, and more reliable connection is realized.

Preferably, the shielding layer 330 of the coaxial cable 300 has two layers, such as aluminum foil in an inner layer and a woven wire mesh in an outermost layer, and the two shielding layers 330 are arranged in an adjacent and overlapping manner, and the connection ends of the two shielding layers are pressed and fixed by the riveted copper pipe 240. By setting the two shielding layers 330, the shielding effect of the shielding layers 330 can be further improved.

Referring to fig. 5 and 6, fig. 5 is a schematic cross-sectional view of a shell conductor according to an embodiment of the present utility model, fig. 6 is a comparative schematic diagram of inner radii and difference relationships among a contact head portion, a cylindrical body portion, and a connection tail portion of the shell conductor according to an embodiment of the present utility model, and it should be noted that fig. 6 is only a schematic diagram of magnitude comparison relationships among values in a radial view, and is not a schematic diagram of an actual structure of the shell conductor in a radial view.

Preferably, the inner radius M of the cylindrical body 232 is smaller than the inner radius T of the corresponding position of the contact head 231 and larger than the inner radius L of the corresponding position of the connection tail 233, i.e., the inner radius T > the inner radius M > the inner radius L.

Preferably, the difference DV1 between the inner radius T of the corresponding position of the contact head 231 and the inner radius M of the cylindrical body 232 is equal to the difference DV2 between the inner radius M of the cylindrical body 232 and the inner radius L of the corresponding position of the connection tail 233, i.e. difference dv1=dv2.

Preferably, the difference DV1 is 1.5 to 3 times the wall thickness d of the housing conductor 230. It will be appreciated that the wall thickness of the housing conductor 230 is uniform. Similarly, the difference DV2 is also 1.5 to 3 times the wall thickness d of the housing conductor 230.

In this way, the housing conductor can be made to change in structure from the contact head 231 to the cylindrical body 232 to the connection tail 233, with a relatively gentle and regular change in structure being formed in the entirety. And the shell conductor 230 is of an integrated structure, multiple sections are not required to be divided into a plurality of conductor parts, only a single shell conductor is required, the shell conductor 230 is directly connected with the shielding layer 330 of the coaxial cable 300 in a crimping way through the connection tail 233 of the shell conductor 230, the compensation characteristic of the cylindrical inner diameter of the shell conductor 230 is set, the compensation capacitor and the inductance characteristic are added, the aim of impedance matching is achieved, the signal reflection effect is improved, and the signal transmission quality is further improved.

Further comparative illustrations are made below by way of example of a FAKRA connector of the prior art and measured values of the connector of the present utility model:

fig. 8 is a schematic diagram of the grounding trend of different outer conductors in the FAKRA connector in the prior art, and the dashed line shows the grounding trend of the outer conductors, and as can be seen from fig. 8, the inner part of the outer conductor in the connector has a structure with a plurality of fluctuation changes in the radial direction, which causes the impedance discontinuity of the connector and seriously affects the signal transmission quality. Fig. 10 is a graph of transmission quality performance test results of a FAKRA connector in the prior art, which is measured by a vector network analyzer, and as can be derived from fig. 10, the standing wave ratio of the FAKRA connector in the prior art is less than or equal to 1.55, and the insertion loss is large.

Fig. 9 is a schematic view of the grounding direction of the shell conductor according to the embodiment of the present utility model, and the grounding direction of the shell conductor is shown by the dashed line, and as can be seen from fig. 9, the interior of the shell conductor 230 according to the embodiment of the present utility model has no obvious undulating change and no irregular structure in the radial direction, and the shell conductor 230 has a relatively gentle and regular structural change as a whole from the contact head 231 to the cylindrical body 232 to the connection tail 233. Fig. 11 is a graph of transmission quality performance test results according to an embodiment of the present utility model, and it can be obtained from fig. 11 that the standing wave ratio measured by the vector network analyzer of the high transmission quality radio frequency plug connector device 100 according to the embodiment of the present utility model is less than or equal to 1.30, and meanwhile, the insertion loss is significantly improved compared with the insertion loss of the FAKRA connector in the prior art.

As apparent from the above figures, the integral stretching full-screen closed structure of the shell conductor 230 and the compensation characteristic setting of the smooth transition of the cylindrical inner diameter achieve good impedance matching effect, so that the grounding is more reliable and stable, noise interference can be effectively shielded, and the signal transmission quality is comprehensively improved.

Referring again to fig. 3, preferably, an axial limiting portion 234 is provided at the connection between the cylindrical body 232 and the connection tail 233, for limiting and stopping the movement of the insulating body 220 in the axial direction within the cylindrical body 232.

The high transmission quality rf plug connector device 100 further comprises a rubber sleeve 250 that is sleeved and fixed outside the outer shell conductor 230, an outer rubber shell 260 and a lock catch 270, and the connection tail 233 is introduced into the shielding layer 330 of the coaxial cable 300 from the crimping end of the coaxial cable 300 up to the end face of the rubber sleeve 250. The outer capsule 260 has a receiving cavity 261 for receiving the housing conductor 230, the sleeve 250 surrounds the cylindrical body 232 of the housing conductor 230 and includes at least one flange 251, the flange 251 cooperating with the catch 270 to lock the sleeve 250 in the outer capsule 260 to maintain the axial position of the housing conductor 230 within the receiving cavity 261.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples merely illustrate embodiments of the utility model and are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (16)

1. A high transmission quality radio frequency plug connector device comprising a plug connector and a coaxial cable connected to the plug connector, said coaxial cable having in sequence at least a central conductor, a dielectric layer and a shielding layer surrounding the outer parts of said central conductor and dielectric layer, the plug connector being provided with at least an inner conductor, an insulating body, a housing conductor, the insulating body insulating said inner conductor and housing conductor apart, the shielding layer of the coaxial cable being electrically connected to the housing conductor of the plug connector, the central conductor of the coaxial cable being electrically connected to the inner conductor of the plug connector,

wherein the shell conductor surrounding the inner conductor is a sleeve structure manufactured through a metal deep drawing process.

2. The high transmission quality radio frequency plug connector device according to claim 1, wherein the front end of the housing conductor is provided as a contact head portion for plugging with a counterpart connector, the middle is provided as a cylindrical body holding a fixed insulating body, and the rear end is provided as a connection tail portion for connecting a coaxial cable, the connection tail portion being crimped with a shield layer of the coaxial cable.

3. The high transmission quality radio frequency plug connector device according to claim 2, wherein the contact head of the housing conductor is of a generally cylindrical configuration formed by extending axially in a radially outwardly expanding manner, and the axial end face thereof is provided with an axially extending slot for forming the contact head into an elastically deformable contact spring.

4. A high transmission quality radio frequency plug connector device according to claim 3, wherein the connection tail portion of the housing conductor is a cylindrical structure folded inwardly in a radially narrowed manner and extending in an axial direction, the connection tail portion having an inner diameter approximately the same as an inner diameter of the shield layer of the coaxial cable.

5. The high transmission quality radio frequency plug connector device according to claim 4, wherein the inner radius M of the cylindrical body is smaller than the inner radius T of the corresponding position of the contact head and larger than the inner radius L of the corresponding position of the connection tail, i.e. inner radius T > inner radius M > inner radius L.

6. The high transmission quality radio frequency plug connector device according to claim 5, wherein the difference DV1 between the inner radius T of the corresponding position of the contact head and the inner radius M of the cylindrical body is equal to the difference DV2 between the inner radius M of the cylindrical body and the inner radius L of the corresponding position of the connection tail, i.e. difference dv1=dv2.

7. The high transmission quality radio frequency plug connector device according to claim 6, wherein the difference DV1 is 1.5 to 3 times the wall thickness d of the housing conductor.

8. The high transmission quality radio frequency plug connector device according to claim 4, wherein an axial limit portion is provided at a junction between the cylindrical body and the connection tail portion for limiting and stopping the movement of the insulating body in the axial direction within the cylindrical body.

9. The high transmission quality radio frequency plug connector device according to claim 4, wherein the connection tail is introduced into the shielding layer of the coaxial cable from the crimping end of the coaxial cable and is crimped and fixed in one body by a rivet copper tube after overlapping a part.

10. The high transmission quality rf plug connector device of claim 9, wherein the connection tail is located between a shielding layer and a dielectric layer of the coaxial cable, and the staked copper tube is a hex copper tube.

11. The high transmission quality radio frequency plug connector device according to claim 10, wherein the connection tail is provided with at least one tail recess groove for reinforcing a crimp fit with the shielding layer of the coaxial cable.

12. The high transmission quality rf plug connector device of claim 11, wherein the coaxial cable has two shielding layers and is disposed in adjacent overlapping relation, and the connection ends are secured by extrusion of a riveted copper tube.

13. The high transmission quality radio frequency plug connector device according to any one of claims 1-12, further comprising a rubber sleeve fitted over and secured to the outer shell conductor, the connection tail being introduced into the shielding layer of the coaxial cable from the crimped end of the coaxial cable up to an end face of the rubber sleeve.

14. The high transmission quality radio frequency plug connector device of claim 13, further comprising an outer housing having a receiving cavity for receiving said housing conductor, said sleeve including at least one flange thereon, said flange cooperating with said latch to lock said sleeve in said outer housing to maintain the axial position of said housing conductor within said receiving cavity.

15. The high transmission quality radio frequency plug connector device according to claim 1, wherein the inner conductor is formed by a stamping and rounding process.

16. The high transmission quality radio frequency plug connector device according to claim 1, wherein one end of the inner conductor is crimped with a center conductor of a coaxial cable.