A high-speed coaxial radio frequency connector with grounding function

Abstract

The present invention relates to a high-speed coaxial radio frequency connector with a grounding function, which is formed by an insulating plastic body and a metal conductive seat being buckled together. The metal conductive seat includes a metal conductive shell, an insulating column, a wiring terminal and a conductive support seat. Along the direction from left to right, the metal conductive shell is formed by an insertion part, a plastic limiting part and a conductive shell body being connected in sequence. The insertion part is composed of a plurality of insertion columns in a rectangular array, which are directly extended to the left by the left side wall of the plastic limiting part. The wiring terminal is passed through and fixed in the insulating column, and is integrally placed in the insertion column. When the metal conductive seat is buckled relative to the insulating plastic body, the axial displacement movement of the insulating plastic body is limited by the plastic limiting part. The conductive support seat is built in and fixed in the cavity of the conductive shell body. The conductive support seat is always kept in a grounded state and is electrically conductive with the metal conductive shell at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of electric connector manufacturing, in particular to a high-speed coaxial radio frequency connector with a grounding function. Background Art

[0002] High-speed coaxial RF connectors are generally considered to be a component that is attached to a cable or installed on an instrument as a component that electrically connects or separates a transmission line. High-speed coaxial RF connectors are mechatronics products. Simply put, they mainly play a bridging role.

[0003] The high-speed coaxial RF connector is formed by an insulating plastic body and a metal conductive seat that are buckled together. The metal conductive seat includes a metal conductive shell, an insulating column and a terminal. Among them, from left to right, the metal conductive shell is connected in sequence by an insertion part, a plastic limiting part and a conductive shell body. The insertion part is composed of a plurality of insertion columns in a rectangular array, which are directly extended to the left by the left side wall of the plastic limiting part. An installation cavity is opened in the insertion column, and it continues to extend to the right until it passes through the plastic limiting part and the conductive shell body. The terminal is passed through and fixed in the insulating column, and is placed in the installation cavity as a whole. When the metal conductive seat is buckled relative to the insulating plastic body, the plastic limiting part is used to limit the axial displacement movement of the insulating plastic body. Most metal conductive shells are one-piece casting structures, and a plug-in method is selected to achieve fixation with the PCB board. In the prior art, the metal conductive shell is not designed to be grounded. As a result, on the one hand, when the signal is transmitted at a specific speed, crosstalk is very likely to occur, which in turn affects the integrity and stability of the signal transmission, and ultimately causes the quality of electronic products to deteriorate and the signal to be unstable. On the other hand, the distance between the plug-in columns used for the wiring terminals is quite close in space, which makes the wiring terminals very susceptible to interference from electromagnetic waves from external electronic components, and ultimately makes the problem of interference (such as electromagnetic wave interference, noise or crosstalk interference between adjacent terminals) during high-frequency signal transmission very serious. Therefore, it is urgent for technicians to solve the above problems. Summary of the invention

[0004] Therefore, in view of the above-mentioned existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and continued to experiment and modify after many years of R&D experience in this industry, which ultimately led to the emergence of this high-speed coaxial RF connector with grounding function.

[0005] In order to solve the above technical problems, the present invention relates to a high-speed coaxial radio frequency connector with a grounding function, which is formed by an insulating plastic body and a metal conductive seat buckled together. The metal conductive seat includes a metal conductive shell, an insulating column and a terminal. Among them, the metal conductive shell is an integral casting structure, and along the left-to-right direction, it is connected in sequence by an insertion part, a plastic limiting part and a conductive shell body. The insertion part is composed of a plurality of insertion columns in a rectangular array, which are directly extended to the left by the left side wall of the plastic limiting part. An installation cavity is provided in the insertion column, and it continues to extend to the right until it penetrates the plastic limiting part and the conductive shell body. The terminal is inserted and fixed in the insulating column, and is placed in the installation cavity as a whole. When the metal conductive seat is buckled relative to the insulating plastic body, the plastic limiting part is used to limit the axial displacement movement of the insulating plastic body. A plurality of limiting columns that are plugged into the PCB board extend downward from the bottom wall of the conductive shell body. In addition, the metal conductive seat also includes a conductive support seat. The conductive support seat is built in and fixed in the cavity of the conductive shell body. The conductive support seat is always kept in a grounded state and is electrically connected with the metal conductive shell at the same time.

[0006] As a further improvement of the technical solution of the present invention, a terminal is also provided on the conductive support seat, which is formed by directly extending downward from the bottom wall of the conductive support seat and passes through the PCB board to achieve conduction with the ground wire.

[0007] As a further improvement of the technical solution of the present invention, the insulating columns are independently supported on the conductive support seat, and correspondingly, the conductive support seat is provided with supporting grooves whose number and positions are matched with the insertion positions of the insulating columns.

[0008] As a further improvement of the technical solution of the present invention, the conductive support seat is preferably fixed to the metal conductive shell by plugging. A front limit boss and a rear limit boss are respectively extended from the front and rear side walls of the conductive support seat, and correspondingly, a front limit groove matching the front limit boss is provided on the front side wall of the conductive shell body, and a rear limit groove matching the rear limit boss is provided on the rear side wall of the conductive shell body.

[0009] As a further improvement of the technical solution of the present invention, an interference contact unit is also provided on the conductive support seat. The interference contact unit includes a first contact convex strip and a second contact convex strip. The first contact convex strip and the second contact convex strip are respectively extended in the opposite direction from the front and rear side walls of the conductive support seat, and the heights are controlled within 0.1 mm.

[0010] As a further improvement of the technical solution of the present invention, the interference contact unit includes a third contact convex strip, a fourth contact convex strip, a fifth contact convex strip, and a sixth contact convex strip. The third contact convex strip and the fourth contact convex strip are respectively extended from the left and right side walls of the front limit boss in the opposite direction, and the height is controlled within 0.1mm. The fifth contact convex strip and the sixth contact convex strip are respectively extended from the left and right side walls of the rear limit boss in the opposite direction, and the height is controlled within 0.1mm.

[0011] Compared with the high-speed coaxial RF connector of the traditional design structure, in the technical solution disclosed in the present invention, an additional conductive support seat is provided. The conductive support seat is always kept in a grounded state, and is electrically connected with each plug-in column at the same time, thereby realizing the grounding operation of each plug-in column. In this way, the conduction path of electromagnetic waves and crosstalk interference for grounding can be effectively reduced, that is, the speed of electromagnetic waves and crosstalk interference being guided and transmitted to the ground for release is increased, thereby ensuring the integrity and stability of high-frequency signals transmitted in the high-speed coaxial RF connector, and ensuring that the high-speed coaxial RF connector has good high-frequency performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the high-speed coaxial RF connector with grounding function and the Fakra plug in the pre-mated state in the present invention.

[0014] Figure 2 It is a three-dimensional schematic diagram of a high-speed coaxial radio frequency connector with a grounding function in the present invention.

[0015] Figure 3 It is an exploded schematic diagram of a high-speed coaxial radio frequency connector with a grounding function in the present invention.

[0016] Figure 4 yes Figure 3 Top view of the .

[0017] Figure 5 yes Figure 4 AA section view.

[0018] Figure 6 yes Figure 4 BB cross-sectional view.

[0019] Figure 7It is a three-dimensional schematic diagram of a metal conductive shell in a high-speed coaxial radio frequency connector with a grounding function of the present invention from a first viewing angle.

[0020] Figure 8 It is a stereoscopic schematic diagram of a second viewing angle of a metal conductive shell in a high-speed coaxial radio frequency connector with a grounding function of the present invention.

[0021] Fig. 9 It is a three-dimensional schematic diagram of a conductive support base in a high-speed coaxial radio frequency connector with a grounding function of the present invention from a first viewing angle.

[0022] Fig.10 It is a stereoscopic schematic diagram of a conductive support base in a high-speed coaxial radio frequency connector with a grounding function of the present invention from a second viewing angle.

[0023] Fig.11 It is a three-dimensional schematic diagram of a conductive support base in a high-speed coaxial radio frequency connector with a grounding function of the present invention from a third viewing angle.

[0024] 1-insulating plastic body; 2-metal conductive seat; 21-metal conductive shell; 211-insertion part; 2111-insertion column; 21111-installation cavity; 212-plastic limiting part; 213-conductive shell body; 2131-limiting column; 2132-front limiting groove; 2133-rear limiting groove; 22-insulating column; 23-connecting terminal; 24-conductive support seat; 241-connecting column; 242-loading groove; 243-front limiting boss; 244-rear limiting boss; 245-interference top contact unit; 2451-first top contact convex strip; 2452-second top contact convex strip; 2453-third top contact convex strip; 2454-fifth top contact convex strip. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "left", "right", "up", "down", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] first, Figure 1 A schematic diagram of the high-speed coaxial RF connector with grounding function and the Fakra plug in the present invention in a pre-mated state is shown. It can be seen that the high-speed coaxial RF connector and the Fakra plug are mated with each other and work together to achieve stable signal transmission.

[0027] The present invention will be further described in detail below with reference to specific embodiments. Figure 2 , Figure 3The three-dimensional schematic diagram and the exploded schematic diagram of the high-speed coaxial RF connector with grounding function in the present invention are respectively shown. It can be seen that it is composed of an insulating plastic body 1 and a metal conductive seat 2 that are buckled together. Among them, the metal conductive seat 2 is mainly composed of a metal conductive shell 21, an insulating column 22, a terminal 23 and a conductive support seat 24. Figure 7 As shown in the figure, the metal conductive shell 21 is an integral casting structure, and from left to right, it is connected in sequence by an inserting portion 211, a plastic limiting portion 212, and a conductive shell body 213. The inserting portion 211 is composed of a plurality of inserting posts 2111 in a rectangular array, which are directly extended to the left from the left side wall of the plastic limiting portion 212. An installation cavity 21111 is provided in the inserting post 2111, and it continues to extend to the right until it penetrates the plastic limiting portion 212 and the conductive shell body 213. Figure 4 , 5 As shown in FIG. 6 , the connection terminal 23 is inserted into and fixed in the insulating column 22, and is integrally placed in the above-mentioned installation cavity 21111. When the metal conductive seat 2 is fastened relative to the insulating plastic body 1, the axial displacement movement of the insulating plastic body 1 is limited by the plastic limiting portion 212 thereon. Figure 7 As shown in the figure, a plurality of limit posts 2131 that are plugged into the PCB board extend downward from the bottom wall of the conductive shell body 213. The conductive support seat 24 is built in and fixed in the cavity of the conductive shell body 213. The conductive support seat 24 is always kept in a grounded state and is electrically connected to the metal conductive shell 21 at the same time. By adopting the above technical solution, the grounding operation of each plug-in post is realized, thereby effectively reducing the conduction path of electromagnetic waves and crosstalk interference for grounding, that is, increasing the speed of electromagnetic waves and crosstalk interference guided and transmitted to the ground for release, thereby ensuring the integrity and stability of high-frequency signals transmitted in the high-speed coaxial RF connector, and ensuring that the high-speed coaxial RF connector has good high-frequency performance.

[0028] It is known that the conductive support seat 24 can adopt a variety of design structures to achieve grounding operation. However, an implementation scheme with a simple design structure, easy implementation, and high grounding stability is recommended here, as follows: Fig.11 As shown in FIG. 2 , a terminal 241 is directly extended downward from the bottom wall of the conductive support seat 24. The terminal 241 passes through the PCB board and is directly connected to the ground wire and electrically conductive.

[0029] Depend on Figure 3 , 4 As shown in FIG. 5 , it can be seen that the insulating columns 22 are independently supported on the conductive support seat 24. The conductive support seat 24 is provided with supporting grooves 242 (such as Fig. 9 , 10). When the insulating column 22 is assembled relative to the metal conductive seat 2, its left half is inserted into the plug-in column 2111, and the plate end is supported by the supporting groove 242, so that the metal conductive shell 21 and the conductive support seat 24 form an organic force-bearing whole. In this way, in the specific application process of the high-speed coaxial RF connector with grounding function, even if the plug-in column 2111 is subjected to lateral force, the conductive support seat 24 can share the force to a certain extent due to the force transmission effect of the insulating column 22, thereby effectively avoiding the plug-in column 2111 from being broken at the root due to excessive lateral force.

[0030] like Figure 2 , 3 As shown in , the conductive support seat 24 is preferably fixed to the metal conductive shell 21 by plugging. As one preferred embodiment, the front and rear side walls of the conductive support seat 24 extend respectively with a front limiting boss 243 and a rear limiting boss 244. Correspondingly, a front limiting groove 2132 adapted to the front limiting boss 243 is provided on the front side wall of the conductive shell body 213, and a rear limiting groove 2133 adapted to the rear limiting boss 244 is provided on the rear side wall of the conductive shell body 213 (as shown in FIG. Figure 8 , 9 , 10). By adopting the above technical solution, the conductive support base 24 and the metal conductive shell 21 have high plug-in stability and reliability, thereby effectively reducing the difficulty of assembling the conductive support base 24 relative to the metal conductive shell 21, thereby ensuring that the high-speed coaxial RF connector with grounding function has a high assembly efficiency as a whole.

[0031] As a further optimization of the structure of the high-speed coaxial RF connector with grounding function, such as Fig. 9 , 10 As shown in , an interference contact unit 245 may also be provided on the conductive support seat 24. The interference contact unit 245 includes a first contact convex strip 2451 and a second contact convex strip 2452. The first contact convex strip 2451 and the second contact convex strip 2452 are respectively formed by the front and rear side walls of the conductive support seat 24 extending in the opposite direction, and the heights are controlled within 0.1 mm. In this way, in the process of performing mutual mating between the conductive support seat 24 and the metal conductive shell 21, the inner side wall of the metal conductive shell 21 is subjected to the lateral squeezing force of the first contact convex strip 2451 and the second contact convex strip 2452, and adaptively expands, thereby effectively eliminating the occurrence of the "axial shaking" phenomenon of the conductive support seat 24 relative to the metal conductive shell 21 caused by the existence of the assembly gap, and the axial mating stability of the conductive support seat 24 and the metal conductive shell 21 is increased to a certain extent due to the existence of the lateral friction force.

[0032] Finally, it should be noted that it is known that a variety of solutions can be used to achieve reliability in the mating of the front limit boss 243 with the front limit groove 2132 and the rear limit boss 244 with the rear limit groove 2133. For example, the front limit boss 243 and the front limit groove 2132 as well as the rear limit boss 244 and the rear limit groove 2133 are preferably mated in an interference fit manner. Although this solution can better achieve the mating stability of the conductive support seat 24 with respect to the metal conductive shell 21, there are also problems such as high mating accuracy requirements and large mating force, which leads to the problem that the mating process is not easy to implement. In view of this, if Fig. 9 , 10 As shown in , in addition to the first top contact convex strip 2451 and the second top contact convex strip 2452, the interference top contact unit 245 may also additionally include a third top contact convex strip 2453, a fourth top contact convex strip, a fifth top contact convex strip 2454, and a sixth top contact convex strip. The third top contact convex strip 2453 and the fourth top contact convex strip are respectively extended from the left and right side walls of the front limiting boss 243 in the opposite direction, and the heights are controlled within 0.1 mm. The fifth top contact convex strip 2454 and the sixth top contact convex strip are respectively extended from the left and right side walls of the rear limiting boss 244 in the opposite direction, and the heights are controlled within 0.1 mm. In this way, in the process of mutual plugging of the conductive support seat 24 and the metal conductive shell 21, the front limiting groove 2132 is subjected to the lateral squeezing force of the third top contact protrusion 2453 and the fourth top contact protrusion, and thus undergoes adaptive elastic expansion. At the same time, the rear limiting groove 2133 is subjected to the lateral squeezing force of the fifth top contact protrusion 2454 and the sixth top contact protrusion, and thus undergoes adaptive elastic expansion, thereby finally achieving the stability of the relative positional relationship between the conductive support seat 24 and the metal conductive shell 21 after plugging.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-speed coaxial RF connector with grounding function, which is formed by an insulating plastic body and a metal conductive seat that are buckled together; the metal conductive seat includes a metal conductive shell, an insulating column and a terminal; wherein, The metal conductive shell is an integral casting structure, and is formed by connecting an insertion part, a plastic limiting part and a conductive shell body in sequence from left to right; the insertion part is composed of a plurality of insertion posts in a rectangular array, which are directly extended to the left from the left side wall of the plastic limiting part; an installation cavity is provided in the insertion post, and it continues to extend to the right until it penetrates the plastic limiting part and the conductive shell body; the wiring terminal is passed through and fixed in the insulating post, and is placed in the installation cavity as a whole; when the metal conductive seat is buckled relative to the insulating plastic body, the plastic limiting part is used to limit the axial displacement movement of the insulating plastic body; a plurality of limiting posts that are plugged into the PCB board extend downward from the bottom wall of the conductive shell body, and the metal conductive seat also includes a conductive support seat; the conductive support seat is built in and fixed in the cavity of the conductive shell body; the conductive support seat is always kept in a grounded state and is electrically conductive with the metal conductive shell at the same time; A terminal is also provided on the conductive support seat; the terminal is formed by directly extending downward from the bottom wall of the conductive support seat, and passes through the PCB board to achieve conduction with the ground wire; The conductive support seat is fixed to the metal conductive shell by plug-in method; a front limit boss and a rear limit boss are respectively extended from the front and rear side walls of the conductive support seat, and correspondingly, a front limit groove matched with the front limit boss is opened on the front side wall of the conductive shell body, and a rear limit groove matched with the rear limit boss is opened on the rear side wall of the conductive shell body; An interference fit top contact unit is also provided on the conductive support seat; the interference fit top contact unit includes a first top contact convex strip and a second top contact convex strip; the first top contact convex strip and the second top contact convex strip are respectively extended in the opposite direction from the front and rear side walls of the conductive support seat, and the heights are controlled within 0.1 mm; The interference top contact unit includes a third top contact convex strip, a fourth top contact convex strip, a fifth top contact convex strip, and a sixth top contact convex strip; the third top contact convex strip and the fourth top contact convex strip are respectively extended from the left and right side walls of the front limit boss in the opposite direction, and the heights are controlled within 0.1mm; and the fifth top contact convex strip and the sixth top contact convex strip are respectively extended from the left and right side walls of the rear limit boss in the opposite direction, and the heights are controlled within 0.1mm; The insulating columns are independently supported on the conductive support seat, and correspondingly, the conductive support seat is provided with supporting grooves whose number and positions are matched with the insertion positions of the insulating columns; and when the insulating column is assembled relative to the metal conductive seat, its left half is inserted into the insertion column, and its plate end is supported and supported by the supporting groove.

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