Wire end connector

Abstract

The utility model discloses a wire end connector, which is characterized in that a plurality of conductive terminals with signal and grounding terminals in upper and lower rows and impedance matching elements positioned between the upper and lower rows are positioned on a base, one side of each signal terminal is welded on a signal wire core of a plurality of cables, and shielding plates are positioned on the upper and lower surfaces of the base. The two shielding plates are provided with a plurality of contact and positioning components which are electrically connected to the plurality of grounding terminals, the plurality of contact components are in multi-point contact with the plurality of grounding terminals except the butt joint parts of the plurality of conductive terminals, and the positioning components can be used for fixing the two shielding plates and are in an electrical connection state; in addition, impedance matching element contact elastic pieces abutting against the impedance matching elements are arranged on the two sides of the shielding plates, insulating bodies are arranged outside the base and the two shielding plates, and a common grounding state is formed through the multi-point contact design.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wire end connector, especially a plurality of contact, positioning members and impedance matching element contact spring pieces of two shielding plates form a multi-point contact and a common grounding state, which can enhance the shielding electromagnetic interference efficiency. BACKGROUND

[0002] In order to maintain a fixed impedance, cable coupling in electronic devices must avoid discontinuity of system impedance to maintain optimal electrical characteristics. An electrical connector is provided between the cable and the electronic device to generate discontinuous impedance at the mating place, further forming insertion loss of reduced signal strength and return loss of reflected signal back to the signal source.

[0003] As mentioned above, insertion loss is related to cable length and the number of connection points. The longer the cable or the more connection points, the greater the loss. Return loss refers to the energy reflected back to the signal source during signal transmission in the conductor due to impedance mismatch or discontinuity. These parameters have important influence on the transmission speed, integrity and reliability of high-frequency signals.

[0004] In addition, in high-frequency characteristics, near-end crosstalk (NEXT) and far-end crosstalk (FEXT) are two common problems. Near-end crosstalk refers to interference signals coupling to adjacent cables near the signal source and affecting signal integrity. Far-end crosstalk refers to interference signals coupling to adjacent cables near the signal receiving end and causing signal distortion. The influence of far-end crosstalk is usually greater than that of near-end crosstalk, as the cumulative interference signal energy increases with cable length.

[0005] Furthermore, the bus of the Peripheral Component Interconnect Express (PCIe) specification is commonly used in electronic products as an interface for high-speed transmission signals. The multi-channel input / output (MCIO) has become the mainstream specification in the market. With the advancement of technology, the MCIO interface rate has increased with the demand, and the MCIO interface electrical connector needs to have excellent high-speed signal transmission stability in addition to being small in size. However, the structure of the tongue plate in the existing MCIO wire end connector is that the two surfaces of the printed circuit board are formed with multiple contacts composed of copper foil. After the tongue plate is miniaturized, there is often a 10% tolerance in size due to process factors. However, the high-speed signal transmission required by the PCIe Gen7 specification cannot meet the standards due to insertion loss and reflection loss. The main reason is that the impedance mismatch problem caused by the size change of the tongue plate leads to excessive reflection loss. However, the key factor to improve the high-frequency problem of the connector is the short-circuit ground, low-impedance ground, multi-point ground, and ground return loop design of the metal shielding shell and the ground line. These factors are another main reason for improving the high-frequency problem of the connector. Therefore, it can be understood that the common ground design of the shielding shell and the ground line of the connector affects the stability of high-frequency transmission. This part needs to be improved by those skilled in the art to better design solutions to solve the problem. Utility model content

[0006] Therefore, in view of the above problems and deficiencies, the purpose of the utility model is to provide a wire end connector.

[0007] The main purpose of the utility model is to position the upper and lower rows of conductive terminals with signal and ground terminals and the impedance matching elements between the upper and lower rows, and to position the two sides of each conductive terminal on the tongue plate and the signal wire core welded to the multiple cables. The shielding plates positioned on the upper and lower surfaces of the base are provided with multiple contact and positioning members electrically connected to the multiple ground terminals. The multiple contact members are in multiple-point contact with the multiple ground terminals in addition to the docking portion of the multiple conductive terminals. The two shielding plates are fixed in contact state by the positioning members. The shielding plates are provided with impedance matching element contact springs that resist the impedance matching elements. The insulating body is integrated with the base and the two shielding plates. The interference and noise of the two shielding plates and the multiple ground terminals are released through the multiple ground terminals in the ground return loop by docking with the preset docking connector.

[0008] The utility model discloses a secondary purpose at utilizing the shielding board between the contact spring of two rear wire cores to set down the bending and the pressure wire spring of the insulating sheath of the cable.

[0009] In order to achieve the above purpose, the utility model provides a wire end connector, including:

[0010] A plurality of conductive terminals are positioned in two rows on the base, and the two sides of the plurality of conductive terminals are located outside the base, and the plurality of conductive terminals include signal terminals and ground terminals, and the side of the plurality of signal terminals is welded on the signal wire core of the plurality of cables.

[0011] Two shielding plates are installed on the base, and the two shielding plates include a plurality of contact members electrically connected to the plurality of ground terminals and a plurality of positioning members, the plurality of contact members are electrically connected to the plurality of ground terminals in multiple points in addition to the docking part of the plurality of conductive terminals, and the plurality of positioning members are capable of combining and fixing the two shielding plates in an electrically connected state.

[0012] An insulating body is installed outside the base and the two shielding plates.

[0013] The base includes a first terminal seat and a second terminal seat, and an impedance matching element is arranged between the first terminal seat and the second terminal seat, and the impedance matching element includes conductive plastic and ground sheet on the two surfaces of the conductive plastic.

[0014] The two sides of the shielding plate are provided with impedance matching element contact springs that abut against the impedance matching element.

[0015] The first terminal seat and the second terminal seat are molded with a plurality of conductive terminals by in-mold injection.

[0016] The contact members of the shielding plate include a plurality of ground springs and a plurality of abutting springs.

[0017] The positioning members include a clamping groove, a connection spring and a connection bending part that position the two shielding plates relative to each other.

[0018] The shielding plate is provided with a bending pressure wire spring that abuts against the insulating sheath of the cable between the two abutting springs. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three-dimensional appearance view of the utility model wire end connector.

[0020] Figure 2 It is the three-dimensional exploded view of the utility model wire end connector.

[0021] Figure 3Another perspective view of the wire end connector of the utility model is shown in Fig. 1B.

[0022] Figure 4 A partial perspective view of the wire end connector of the utility model is shown in Fig. 1C.

[0023] Figure 5 Another perspective view of the wire end connector of the utility model is shown in Fig. 1C.

[0024] Figure 6 A perspective view of the base and the impedance matching element of the utility model is shown in Fig. 2A.

[0025] Figure 7 Another perspective view of the base and the impedance matching element of the utility model is shown in Fig. 2B.

[0026] Figure 8 A partial side view of the wire end connector of the utility model is shown in Fig. 3.

[0027] Reference signs: 1-base; 11-first terminal seat; 12-second terminal seat; 13-conductive terminal; 131-signal terminal; 1311-mating portion; 1312-welding portion; 132-ground terminal; 1321-mating portion; 1322-welding portion; 14-cable; 141-signal wire core; 142-ground wire core; 15-clamping post; 16-clamping slot; 17-fixing post; 18-clamping buckle; 2-impedance matching element; 21-conductive plastic; 211-bump; 212-clamping block; 213-perforation; 22-grounding sheet; 221-elastic arm; 222-limiting slot; 223-through hole; 224-positioning slot; 225-through slot; 226-positioning elastic sheet; 3-shielding plate; 31-contacting member; 311-grounding elastic sheet; 312-resisting elastic sheet; 32-positioning member; 321-docking slot; 322-linking elastic sheet; 323-linking bent portion; 33-impedance matching element contacting elastic sheet; 34-wire pressing elastic sheet; 4-fixing body; 40-threading cavity; 41-cover; 42-base; 5-insulating body; 50-receiving chamber; 51-tongue plate; 511-terminal slot. DETAILED DESCRIPTION

[0028] To achieve the above-mentioned purposes and effects, the utility model adopts the technical means and structure, and the features and functions of the preferred embodiments of the utility model are described as follows by referring to the drawings, so as to fully understand the utility model.

[0029] Please refer to Figures 1-8As shown, respectively, are the three-dimensional appearance view, the three-dimensional exploded view, another perspective three-dimensional exploded view, the partial three-dimensional exploded view, another perspective partial three-dimensional exploded view, the three-dimensional exploded view of the base and the impedance matching element, another perspective three-dimensional exploded view of the base and the impedance matching element, and the partial side view of the wire end connector, and it can be clearly seen from the drawings that the utility model mainly comprises a base 1, an impedance matching element 2, two shielding plates 3, a fixed body 4 and an insulating body 5, and the main components and features are described as follows:

[0030] The base 1 comprises a first terminal seat 11 located in the upper row and a second terminal seat 12 located in the lower row, the first terminal seat 11 and the second terminal seat 12 are both internally provided with a plurality of conductive terminals 13 formed by insert molding, the plurality of conductive terminals 13 comprise signal terminals 131 and ground terminals 132 arranged in a staggered manner, and the butt joint portions (1311, 1321) of the plurality of signal terminals 131 and the plurality of ground terminals 132 are exposed from the first terminal seat 11 and the second terminal seat 12, a plurality of cables 14 are welded on the welding portions (1312, 1322) of the first terminal seat 11 and the second terminal seat 12 corresponding to the plurality of signal terminals 131 and the plurality of ground terminals 132 extending towards the rear end, and the cable 14 comprises a plurality of signal wire cores 141 welded to the plurality of signal terminals 131 and a plurality of ground wire cores 142 welded to the plurality of ground terminals 132.

[0031] The impedance matching element 2 is arranged between the first terminal seat 11 and the second terminal seat 12, and the impedance matching element 2 comprises a plurality of bumps 211 and a plurality of elastic arms 221 in contact with the plurality of ground terminals 132 on the upper and lower surfaces.

[0032] The two shielding plates 3 are integrally formed by stamping and arranged on the first terminal seat 11 and the second terminal seat 12, and the shielding plate 3 comprises a plurality of contact members 31 electrically connected to the plurality of ground terminals 132, a positioning member 32, an impedance matching element contact spring 33 and a wire pressing spring 34, wherein the transverse width direction of the surface of the shielding plate 3 is provided with a plurality of arrayed ground springs 311 and abutting springs 312 formed by downward stamping, and the wire pressing spring 34 is arranged on the surface of the shielding plate 3 at the space formed by stamping adjacent abutting springs 312, and the impedance matching element contact spring 33 and the positioning member 32 are arranged on the plate surface of the two side edges of the shielding plate 3 near the plurality of ground springs 311, and the buckle groove 321 of the positioning member 32 is arranged in abutting contact with the impedance matching element 2, and the engaging spring 322 and the engaging bent portion 323 of the positioning member 32 are arranged on the two sides of the plate edge near the rear ground spring 311 and the abutting spring 312, and further, the plurality of contact members 31 and the plurality of positioning members 32 are formed by stamping the surfaces of the two shielding plates 3 towards the base 1.

[0033] The insulating body 5 has a receiving chamber 50 inside for receiving and pushing the base 1 and the fixing body 4, and has a tongue plate 51 inside the insulating body 5 towards the front end for the plurality of conductive terminals 13 to pass through. The insulating body 5 and the tongue plate 51 are integrally formed, and the upper and lower surfaces of the tongue plate 51 are formed with a plurality of terminal grooves 511 for receiving and positioning the butt joint parts (1311, 1321) of the plurality of signal terminals 131 and the plurality of ground terminals 132 and exposed.

[0034] The above-mentioned wire end connector further comprises a fixing body 4 composed of an upper cover 41 and a lower base 42. The cover 41 and the base 42 form a wire passing cavity 40 for the plurality of cables 14 to pass through, and the fixing body 4 is installed outside the two shielding plates 3 and the plurality of cables 14.

[0035] The assembly of the above-mentioned insulating body 5, base 1 and fixing body 4 is mainly through the snap (such as buckle and buckle groove) structure to form assembly and fixation, but this is not the technical feature of the present application, so it is not described in detail.

[0036] The first terminal seat 11 and the second terminal seat 12 of the above-mentioned base 1 are of the same structure, and the rear side of the bottom surface of the first terminal seat 11 and the second terminal seat 12 is formed with a plurality of clamping columns 15 and a plurality of clamping grooves 16 for clamping and fixing each other; the bottom surface of the first terminal seat 11 and the second terminal seat 12 of the base 1 is protruded with a plurality of fixing columns 17 passing through the impedance matching element 2, so that the impedance matching element 2 is fixed between the first terminal seat 11 and the second terminal seat 12; the two sides of the first terminal seat 11 and the second terminal seat 12 of the base 1 are outwardly protruded with at least one buckle 18, and the two sides of the shielding plate 3 are hollowed out with a buckle groove 321 for clamping and fixing the buckle 18.

[0037] The impedance matching element 2 includes a conductive plastic 21 and two grounding sheets 22 installed on two surfaces of the conductive plastic 21. The conductive plastic 21 and the two grounding sheets 22 are fixed by a plurality of clamping blocks 212 and a plurality of limiting grooves 222. The two surfaces of the conductive plastic 21 are provided with a plurality of protrusions 211, and the two grounding sheets 22 are provided with a plurality of through holes 223 corresponding to the protrusions 211. The two grounding sheets 22 are provided with a plurality of elastic arms 221 bent outward. The conductive plastic 21 is provided with a plurality of through holes 213 corresponding to the protrusions 211, and the two grounding sheets 22 are provided with a plurality of positioning grooves 224 and a plurality of through grooves 225 corresponding to the through holes 213. The two grounding sheets 22 are provided with at least one positioning elastic sheet 226. The conductive coefficient of the conductive plastic 21 is less than that of metal conductors such as gold, silver, and copper. The conductive coefficient of the conductive plastic 21 can be adjusted to match the impedance of the conductive terminal 13. The overall return loss, insertion loss, near-end crosstalk (NEXT), and far-end crosstalk (FEXT) of the wire end connector can be greatly reduced, and the high-speed signal transmission characteristics are better and more stable. The combination structure of the impedance matching element 2 can not only strengthen the impedance matching, but also absorb the vibration and instantaneous arc generated when the impedance matching element 2 is connected with a mating connector (such as a board end connector), shield electromagnetic interference (EMI), and form a grounding loop with the two shielding plates 3 and the plurality of grounding terminals 132.

[0038] The upper and lower surfaces of the base 1 are positioned with shielding plates 3, and the two shielding plates 3 are provided with a plurality of contact members 31 electrically connected to the plurality of grounding terminals 132, and positioning members 32, the plurality of contact members 31 include a plurality of grounding springs 311 and a plurality of abutting springs 312, the plurality of contact members 31 are in multi-point contact with the plurality of grounding terminals 132 except for the abutting portions (1311, 1321) of the plurality of conductive terminals 13, and the positioning members 32 include a buckle groove 321, an abutting spring 322 and an abutting bent portion 323 for positioning the two shielding plates, and the positioning members 32 can fix the two shielding plates 3 in an electrically connected state, and the two sides of the shielding plate 3 are provided with impedance matching element contact springs 33 abutting against the impedance matching element 2, and the two sides of the shielding plate 3 are formed with the abutting spring 322 and the abutting bent portion 323, the two shielding plates 3 are electrically connected after being fixed by the abutting spring 322 and the abutting bent portion 323, and a common grounding state is formed by the multi-point contact design, and the shielding plate 3 is provided with a wire pressing spring 34 downwardly bent and abutting against the insulating sheath of the cable 14 between the two abutting springs 312, in addition, the shielding plate 3 is formed with a plurality of hollow portions corresponding to the plurality of abutting springs 312 and the plurality of wire pressing springs 34, the plurality of hollow portions can keep the area of the soldering portion 1312 of the signal terminal 131 and the soldering portion of the signal wire core 141 in contact with air, so as to control the impedance matching of the wire end connector, and reduce the transmission signal attenuation value caused by insertion loss and reflection loss.

[0039] In use, the cable connector of the utility model is connected to a preset connector (not shown in the figure), and the two shielding plates 3, the impedance matching element 2 and the plurality of grounding terminals 132 are in multi-point contact to form a common grounding, so that the high-frequency noise can be effectively released through the common grounding loop formed by the grounding terminals 132 and the grounding structure of the preset connector, and the ingenious design can simultaneously achieve the effects of short-circuit grounding, low-impedance grounding, multi-point grounding and increasing the grounding area, thereby effectively suppressing the interference and noise generated by the connector during high-frequency transmission, and increasing the stability of the cable connector during high-frequency signal transmission.

[0040] The above is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model, so any simple modification and equivalent structural change based on the contents of the utility model specification and drawings should be included in the scope of the utility model, and it is hereby declared.

[0041] In summary, the wire end connector of the utility model can achieve the effects and purposes, and the utility model is a utility model with excellent practicality.

Claims

1. A wire end connector characterized by, Comprising: a base is positioned with two rows of multiple conductive terminals, and the two sides of the multiple conductive terminals are respectively located outside the base, and the multiple conductive terminals include signal terminals and ground terminals, and the side of the multiple signal terminals is welded to the signal wire core of the multiple cables; and two shielding plates are installed on the base, and the two shielding plates include multiple contact members electrically connected to the multiple ground terminals and multiple positioning members, the multiple contact members are electrically contacted to the multiple ground terminals at multiple points in addition to the butt joint part of the multiple conductive terminals, and the multiple positioning members can be combined and fixed to the two shielding plates in an electrically connected state; and an insulating body is installed outside the base and the two shielding plates.

2. The wire end connector of claim 1, wherein, The base includes a first terminal seat and a second terminal seat, and an impedance matching element is arranged between the first terminal seat and the second terminal seat, and the impedance matching element includes conductive plastic and ground sheets on the two surfaces of the conductive plastic which are contacted to the multiple ground terminals.

3. The wire end connector of claim 2, wherein, The two sides of the shielding plate are provided with impedance matching element contact springs which abut against the impedance matching element.

4. The wire end connector of claim 2, wherein, The multiple conductive terminals in the first terminal seat and the second terminal seat are molded by in-mold injection.

5. The wire end connector of claim 1, wherein, The contact members of the shielding plate include multiple ground springs and multiple abutting springs.

6. The wire end connector of claim 1, wherein, The positioning members include a buckle groove, a link spring and a link bending part which position the two shielding plates relative to each other.

7. The wire end connector of claim 5, wherein, The shielding plate is provided with a wire pressing spring between the two abutting springs, and the wire pressing spring abuts against the insulating outer skin of the cable.

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