CN204441622U - Ground structure of USB connector - Google Patents

Abstract

The utility model provides a grounding structure of USB connector, wherein the insulation body is provided with a first terminal set and a second terminal set combined with an electric module, the insulation body is internally combined with a metal grounding plate positioned between the first terminal set and the second terminal set, one side of the first terminal set and one side of the second terminal set are respectively provided with a first contact part and a second contact part which are exposed out of the upper side and the lower side of the front butt joint part of the insulation body, and then the first connecting part and the second connecting part at the other side of the first terminal set and the second terminal set are respectively connected with a first lead set and a second lead set of a transmission cable, so that a shielding body positioned at the periphery of the first lead set and the second lead set can be electrically connected with the metal grounding plate to form common grounding and have the function of grounding, and provide the best shielding effect, and can simplify the manufacturing procedure to achieve the effect of saving the assembling man-hour and the cost because a printed circuit board is not required to be configured for connection, the volume can be effectively reduced, so that the whole body is thinner.

Description

Ground structure of USB connector

technical field

The utility model provides a grounding structure of a USB connector, especially an insulating body located between the first terminal group and the second terminal group is combined with a metal grounding plate, and the metal grounding plate is used to overlap the first wire group and the second terminal group. The shielding body positioned around the wire group forms a common ground and has the function of grounding, so as to provide the best shielding effect.

Background technique

According to the rapid development of electronic technology nowadays, the type of computer has developed from a desktop computer to a small and portable notebook computer, which is widely used in every corner of the society. When users want to perform data signal transmission or When it is connected with other peripheral devices, the so-called peripheral device interface is required, and the peripheral device interface on the market is the most common and widely used by the public, and the universal serial bus (USB) is still the mainstream, and it is supported by USB The hot-swappable function is plug-and-play, and it is easier to use.

Furthermore, today USB3.0 has become the most popular mainstream connection interface, and is fully used in various external electronic products, such as external hard drives, solid state drives, DVD players, etc., while facing other high-speed interfaces To meet the challenge, the USB3.1Type-C specification was launched, which is mainly slightly larger in size than the existing USB2.0Mirco-B, supports higher power charging and power supply capabilities, and has a transmission speed of up to 10Gbps, and supports front and back in use. Pluggable, users no longer need to distinguish the front and back, it is easier to insert the interface, and it can be expanded to be applicable to thin and light mobile devices such as tablets and smart phones, so it is particularly expected by the market.

The design of the USB Type-C connector is very different from the previous USB connectors. It adopts the type of terminals in the upper and lower rows at the same time, and in the processing of the cable of the line end connector (Plug), it must be on the end of the end of the line end connector. For printed circuit board connection, the multiple core wires of the cable are soldered on the printed circuit board. With the miniaturization of the USB Type-C connector and the significant increase in transmission speed, the number of terminals increases and the distribution is dense. Signal interference during high-frequency signal transmission (such as electromagnetic wave interference, crosstalk interference, etc.) caused by too close to each other, will grow at a faster rate in the future, making the signal interference problem of the connector itself more serious, and generally The electromagnetic wave interference that affects the connector can be roughly divided into the following two types. One is the conducted interference that is mainly transmitted to the connector through the conductors such as power lines and signal lines on the circuit board, and the other is the electromagnetic wave that propagates around the connector. The radiation interference caused by the radiation space, so the common practice nowadays is to set the metal grounding plate between the upper and lower rows of terminals inside the insulating body to form shielding and isolation, and the metal grounding plate can pass through the metal contacts of the printed circuit board and the upper and lower rows. The grounding parts of the terminals are overlapped to achieve the function of grounding to reduce electromagnetic waves and crosstalk interference generated during high-frequency signal transmission.

However, the upper and lower rows of terminals of the USB Type-C connector are connected to the metal contacts at the front of the printed circuit board by means of elastic friction or welding, and are connected to the metal contacts at the rear by lines and welded to the multiple core wires of the cable. The grounding part of the upper and lower rows of terminals can form a common grounding loop through the printed circuit board and the grounding core wire of the cable. The connection of the cable still needs to be assembled and soldered through the printed circuit board, which not only makes the overall manufacturing process more complicated and consumes a lot of man-hours and costs, but also the printed circuit board configuration will occupy a certain volume, so that the connector as a whole The size cannot be effectively reduced, which is not conducive to wider application in thin and light electronic products.

Utility model content

Therefore, in view of the above-mentioned existing problems and deficiencies, the designer of the new utility model began to design this kind of utility model by collecting relevant information, evaluating and considering it in many ways, and making use of years of experience in research and development in this industry for continuous trial production and modification. A new type of grounding structure for USB connectors is born.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A grounding structure of a USB connector is characterized in that it includes an insulating body, an electrical module, a metal grounding plate and a transmission cable, wherein:

The insulating body has a base, and a docking portion is provided at the front of the base, and an electrical module is combined with the insulating body;

One side of the first terminal group and the second terminal group included in the electrical module are respectively provided with a first contact portion and a second contact portion that pass through and are exposed on the upper and lower sides of the docking portion, and are located between the first terminal group and the second terminal group. The two terminal groups are respectively provided with a first connection part and a second connection part on the other side of the first contact part and the second contact part;

The metal grounding plate is combined inside the insulating body and forms shielding and isolation between the first terminal group and the second terminal group of the electrical module;

The transmission cable includes a first wire group and a second wire group respectively connected to the first connection part of the first terminal group and the second terminal group to form an electrical connection on the second connection part, and the first wire group and the second wire group are electrically connected. A shielding body electrically connected to the metal ground plate to form a common ground is positioned around the second wire group.

The grounding structure of the USB connector, wherein: the insulating body is covered and positioned with a shielding shell, and inside the shielding shell there is a plugging space for the docking part to extend into it to form a suspended state, and the shielding On the upper and lower sides of the rear of the housing, there are a plurality of grounding shrapnels that are bent and extended relatively inward toward the insertion space, and are respectively lapped on the shielding body to form a ground.

The grounding structure of the USB connector, wherein: the first terminal seat and the second terminal seat of the electrical module are respectively covered with an upper cover made of metal material and a lower cover combined with the lower part of the upper cover plate, and the upper cover and the lower cover are provided with a plurality of resisting shrapnel which interfere with the shielding shell to form a ground.

The grounding structure of the USB connector, wherein: the outside of the shielding shell is further combined with the first shell of the positioning member and the second shell below the first shell, and the first shell and the second shell are respectively There are a plurality of contact shrapnels that are in contact with the shielding shell to form a ground.

The grounding structure of the USB connector, wherein: the front side of the first shell and the second shell of the positioning member are turned outwards to extend flat extension pieces that abut against each other, and the two extension pieces are respectively provided with opposite perforation.

The grounding structure of the USB connector, wherein: the base of the insulating body forms an accommodating space at the rear, and at the upper and lower sides behind the metal grounding plate, there are raised parts exposed to the accommodating space, and A contact surface that can be lapped by the shielding body to form a ground is formed on the surface of the pad.

The grounding structure of the USB connector, wherein: the two sides of the raised part of the metal grounding plate extend backwards with fixing pieces passing through the periphery of the first terminal seat and the second terminal seat of the electrical module, and on the second The first terminal seat, the second terminal seat and the outside of the fixing piece are integrally formed with an insulating body by mosaic injection, and a slot is respectively formed between the two fixing pieces and the raised portion.

The grounding structure of the USB connector, wherein: the first terminal seat and the second terminal seat of the electrical module are respectively formed on the outer surface opposite to the rear, where the first wire group and the second wire group can be positioned and connected to the first terminal. A plurality of first positioning slots and second positioning slots connected to the first connecting portion of the group and the second connecting portion of the second terminal group.

The grounding structure of the USB connector, wherein: the transmission cable includes a first wire group and a second wire group each having twelve wires in the upper and lower rows, and the first and second wires in the first wire group The four, ninth, and twelfth wires are the first ground wire, the first power wire, the second power wire and the second ground wire in sequence, and the rest of the wires are signal transmission wires, and the second wire group is opposite to the first wire. The first, fourth, ninth, and twelfth wires in a wire group are the third ground wire, the third power wire, the fourth power wire and the fourth ground wire in sequence, and the rest of the wires are signal wires. Transmission wires, and the upper and lower sides of the shielding body are provided with a plurality of metal plates for the first power wire, the second power wire, the third power wire and the fourth power wire to straddle it and form shielding and isolation with the multiple signal transmission wires .

The grounding structure of the USB connector, wherein: the shielding body has four metal plates respectively positioned at the periphery of the signal transmission wires of the first wire group and the second wire group to form a stacked arrangement up and down.

Compared with the prior art, the utility model has the beneficial effects of:

The utility model combines the first terminal group and the second terminal group of the electrical module on the insulating body, and combines a metal grounding plate between the first terminal group and the second terminal group to form shielding and isolation inside the insulating body. And one side of the first terminal group and the second terminal group are respectively provided with a first contact part and a second contact part exposed on the upper and lower sides of the front butt joint part of the insulating body, and then on the other side of the first terminal group and the second terminal group The first connecting part and the second connecting part at one side are respectively connected with the first wire group and the second wire group of the transmission cable, so that the shield body positioned at the periphery of the first wire group and the second wire group can be electrically connected It has the function of grounding and provides the best shielding effect, and because it does not need to configure the printed circuit board for connection, it can simplify the manufacturing process and save assembly man-hours and costs. The volume is effectively reduced to make the overall thinner, which is more widely applicable to thin and light electronic products.

The transmission cable of the present utility model includes a first wire group and a second wire group each having twelve wires in the upper and lower rows, and the first, fourth, ninth, and twelfth wires of the first wire group The first wire is the first ground wire, the first power wire, the second power wire and the second ground wire in sequence, and the second wire group is opposite to the first wire, the fourth wire, the ninth wire, and the first wire group in the first wire group. The twelve wires are the third ground wire, the third power wire, the fourth power wire and the fourth ground wire in sequence, and can be positioned around the first wire group and the second wire group by virtue of the four metal plates of the shielding body The upper and lower layers are arranged so that the first power wire, the second power wire, the third power wire and the fourth power wire straddle the metal plates on the upper and lower sides of the shield body and the plurality of signal transmission wires to form shielding and isolation, so as to Effectively prevent the lack of power noise interference caused by the close distance.

The outer cover of the insulating body of the utility model is positioned with a shielding shell, and inside the shielding shell there is a plugging space for the docking part to extend into, and the upper and lower sides of the shielding shell are provided with relatively inward bending extensions. A plurality of ground shrapnel, the ground shrapnel can be lapped on the shielding body around the first wire group and the second wire group, so that the shielding shell can form a common grounding loop through the shielding body and the metal grounding plate, when When the first terminal group and the second terminal group of the electrical module transmit high-frequency signals, the electromagnetic wave and crosstalk interference formed between them can be absorbed by the metal grounding plate, and then guided by the shielding body and transmitted to the shielding shell for grounding Release, and then make the quality of the overall signal transmission more stable and reliable.

The outside of the shielding shell of the utility model is combined with the first shell and the second shell of the positioning member, and the contact elastic pieces at the opposite inner sides of the first shell and the second shell are respectively opposed to the shielding shell, and then the extension piece is used to perforate The fixing element further pierced in the circuit board or the casing forms a common grounding loop, and the electromagnetic wave and noise interference generated around the USB connector can be guided to the circuit board by virtue of the shielding shell and the positioning member. Release on the ground terminal or the chassis to improve the effect of grounding and shielding.

Description of drawings

Fig. 1 is the three-dimensional exterior view of the utility model;

Fig. 2 is a three-dimensional exploded view of the utility model;

Fig. 3 is a three-dimensional exploded view of another viewing angle of the utility model;

Fig. 4 is a side view sectional view of the utility model;

Fig. 5 is a partially enlarged view of Fig. 4 of the present utility model;

Fig. 6 is a rear perspective sectional view of the utility model.

Explanation of reference signs: 1-insulating body; 11-base; 110-accommodating space; 111-embedding groove; 12-butting part; 120-positioning space; A terminal group; 211-the first contact part; 212-the first connection part; 22-the second terminal group; 221-the second contact part; 222-the second connection part; 23-the first terminal seat; 231-the first Positioning groove; 24-second terminal seat; 241-second positioning groove; 25-upper cover plate; 251-button hole; 252-resist shrapnel; 26-lower cover plate; ;3-metal grounding plate; 30-metal plate; 31-pad height; 311-contact surface; 32-fixation piece; 321-missing slot; 4-transmission cable; Ground wire; 412-first power wire; 413-second power wire; 414-second ground wire; 42-second wire group; 421-third ground wire; 422-third power wire; 423-fourth power supply Wire; 424-the fourth grounding wire; 43-shielding body; 431-metal plate; 5-shielding shell; 50-inserting space; 51-grounding shrapnel; 1 shell; 611-convex buckle; 612-contact spring; 613-extension piece; 614-perforation; 62-second shell; 621-button groove; 622-contact spring;

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and the structure thereof adopted by the utility model are hereby illustrated in detail with respect to the preferred embodiment of the utility model. Its structure and function are as follows, so as to fully understand it.

Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, and Fig. 6, which are respectively a three-dimensional appearance diagram, a three-dimensional exploded view, a three-dimensional exploded view of another viewing angle, a side sectional view, and a diagram of the utility model. 4, the partial enlarged view and the rear view three-dimensional sectional view can be clearly seen from the figure that the utility model includes an insulating body 1, an electrical module 2, a metal grounding plate 3, a transmission cable 4, a shielding shell 5 and a positioning Component 6, so the main components and features of this case are described in detail below, of which:

The insulating body 1 is provided with a base 11, and a tongue plate 121 extending outwards from the front of the base 11 is provided with a butt joint 12 in a suspended shape, and a positioning space 120 is formed inside the tongue plate 121. In order to form an accommodating space 110 penetrating transversely into the positioning space 120 , step-shaped engaging grooves 111 are formed on both upper and lower sides of the base 11 adjacent to the docking portion 12 .

The electrical module 2 includes a first terminal group 21 and a second terminal group 22 in upper and lower rows, and the first terminal group 21 and the second terminal group 22 are integrally formed by insert molding using plastics respectively. There is a first terminal base 23 and a second terminal base 24 combined under the first terminal base 23, or a first terminal group can be positioned on the first terminal base 23 and the second terminal base 24 by means of assembly. 21 and the second terminal group 22, and a plurality of first positioning grooves 231 and second positioning grooves 241 arranged at intervals in the transverse direction are respectively formed on the outer surface of the first terminal seat 23 and the second terminal seat 24 on the rear relative outer surface, and the first terminal One side of the group 21 and the second terminal group 22 are respectively provided with a first contact part 211 and a second contact part 221 that pass through and are exposed on the upper and lower sides of the first terminal seat 23 and the second terminal seat 24, and The first terminal group 21 and the second terminal group 22 are respectively provided with first connecting parts located in the first positioning groove 231 and the second positioning groove 241 on the other side of the first contact part 211 and the second contact part 221 212 and the second connecting portion 222; in addition, the first terminal base 23 and the second terminal base 24 are respectively covered with the opposite upper cover plate 25 and the lower cover plate 26 combined with the lower cover plate 25 below the upper cover plate 25. The two sides of the cover plate 25 and the lower cover plate 26 are provided with a plurality of buttonholes 251 and buckles 261 which are correspondingly fastened and positioned, and a plurality of resisting elastic pieces 252, 262.

Furthermore, the first terminal group 21 and the second terminal group 22 respectively have twelve upper-row terminals and twelve lower-row terminals opposite to each other, and the pin positions of the first terminal to the twelfth terminal in the upper row of terminals are defined as The sequence is the first ground terminal (GND), the first high-speed positive differential pair signal terminal (TX1+), the first high-speed negative differential pair signal terminal (TX1-), the first power supply terminal (VBus), the first spare terminal (CC1 ), the second high-speed positive differential pair signal terminal (D+), the second high-speed negative differential pair signal terminal (D-), the second spare terminal (SBU1), the second power supply terminal (VBus), the third high-speed negative differential pair signal terminal terminal (RX2-), the third high-speed positive differential pair signal terminal (RX2+) and the second grounding terminal (GND), and the twelve lower row terminals correspond to the first terminal to the twelfth terminal pin position in the upper row of terminals The definition is the third ground terminal (GND), the fourth high-speed positive differential pair signal terminal (RX1+), the fourth high-speed negative differential pair signal terminal (RX1-), the third power supply terminal (VBus), and the third spare terminal (SBU2), the fifth high-speed negative differential pair signal terminal (D-), the fifth high-speed positive differential pair signal terminal (D+), the fourth spare terminal (CC2), the fourth power supply terminal (VBus), the sixth high-speed negative differential A pair of signal terminals (TX2-), a sixth high-speed positive differential pair signal terminal (TX2+) and a fourth ground terminal (GND) to form a USB Type-C connector specification.

The metal grounding plate 3 is preferably implemented as having two metal plates 30 stacked on each other, but in actual application, the metal grounding plate 3 can also be a single-layer or multi-layer metal plate 30, and the metal grounding plate 3 is placed up and down behind the metal grounding plate 3. The raised portion 31 protruding outwards is formed on both sides along the width direction, and a flat contact surface 311 is formed on the surface of the raised portion 31, and the two sides of the raised portion 31 of the metal ground plate 3 are There are fixed pieces 32 extending backward, and a slot 321 is formed between the two fixed pieces 32 and the raised part 31 respectively, but there are many ways to form and structurally design the metal ground plate 3 in this part, and it can be used according to the actual application. It will be changed and implemented, and the composition of this detail is not the main point of the creation of this case, so I will not repeat it here.

The transmission cable 4 includes a first wire group 41 and a second wire group 42 each having twelve wires in the upper and lower rows, and a plurality of metal plates are positioned around the first wire group 41 and the second wire group 42 431 shield 43, and the first, fourth, ninth, and twelfth wires in the first wire group 41 are the first ground wire 411, the first power wire 412, the second power wire wire 413 and the second grounding wire 414, and the rest of the wires are signal transmission wires, and the second wire group 42 is relative to the first, fourth, ninth, and twelfth wires in the first wire group 41. The sequence is the third ground wire 421, the third power wire 422, the fourth power wire 423 and the fourth ground wire 424, and the other wires are all signal transmission wires, and the four metal plates 431 of the shielding body 43 are respectively positioned on the first The multiple signal transmission wires of the wire group 41 and the second wire group 42 are stacked up and down at the periphery, and the first ground wire 411, the second ground wire 414, the third ground wire 421 and the fourth ground wire 424 are respectively located in the complex signal transmission wires. The metal plates 431 placed on both sides of the wires, as well as the first power wire 412, the second power wire 413, the third power wire 422 and the fourth power wire 423 respectively straddle the upper and lower sides of the shield 43 can pass through the metal plate 431 to shield and isolate the first power wire 412 , the second power wire 413 , the third power wire 422 and the fourth power wire 423 from the plurality of signal transmission wires.

The inside of the shielding shell 5 has a transversely penetrating insertion space 50 , and a plurality of suspended grounding shrapnel 51 in the direction of the insertion space 50 are provided on the upper and lower sides behind the shielding shell 5 and are relatively inwardly bent and extended. Moreover, a tapered abutting surface 511 tapering inwardly is formed at the end of each grounding elastic piece 51 .

The positioning member 6 has a first shell 61 and a second shell 62 combined under the first shell 61, and is provided with a plurality of protrusions that are correspondingly snapped and positioned at both sides of the first shell 61 and the second shell 62. The buckle 611 and the buckle groove 621, and the opposite inner side of the first shell 61 and the second shell 62 are respectively provided with a plurality of suspended contact elastic pieces 612, 622, and are facing toward the front side of the first shell 61 and the second shell 62. There are flat extension pieces 613, 623 that are attached to each other extending from the outer turning, and the two extension pieces 613, 623 are respectively provided with relative perforations 614, 624, and a fixing element (not shown in the figure) is pierced in the perforations 614, 624. Shows).

When the utility model is assembled, the metal grounding plate 3 is first positioned between the first terminal base 23 and the second terminal base 24 of the electrical module 2 to form mutual stacking, and the semi-finished product is assembled into a semi-finished product by means of fitting and clamping, that is, The first terminal group 21, the second terminal group 22 and the metal ground plate 3 can be isolated and insulated by the first terminal base 23 and the second terminal base 24, and the raised portion 31 of the metal ground plate 3 and the fixing piece 32 pierces through the periphery of the first terminal block 23 and the second terminal block 24, and then uses plastic to mosaic injection on the outside of the first terminal block 23, the second terminal block 24 of the electrical module 2 and the fixing piece 32 of the metal ground plate 3 After the insulating body 1 is integrally formed in a manner, the first terminal base 23 and the second terminal base 24 can be combined in the positioning space 120 of the docking part 12, and the first contact part 211 of the first terminal group 21 and the second The second contact portions 221 of the two terminal groups 22 pass through and are exposed at the upper and lower sides of the tongue plate 121 of the docking portion 12 , and the raised portion 31 of the first connecting portion 212 , the second connecting portion 222 and the metal ground plate 3 . They are respectively exposed at the accommodating space 110 of the base 11, and the metal grounding plate 3 can also pass through the gap 321 between the raised part 31 and the fixed piece 32 at the two sides, so that the raised part 31 is located in the accommodation space of the base 11. The placement space 110 forms a suspended state, and the upper cover 25 and the lower cover 26 covered by the first terminal base 23 and the second terminal base 24 are respectively combined in the engaging groove 111 of the docking portion 12 to form a position.

Next, the first wire group 41 and the second wire group 42 of the transmission cable 4 are respectively positioned in the first positioning groove 231 of the first terminal base 23 and the second positioning groove 241 of the second terminal base 24, and are connected with the first positioning groove 241 of the second terminal base 24. The first connecting portion 212 of a terminal group 21 and the second connecting portion 222 of the second terminal group 22 can be firmly connected by means of welding, riveting or piercing terminals, etc. to form an electrical connection, and the shielding body 43 is located at the second The two metal plates 431 between the first wire group 41 and the second wire group 42 are respectively lapped on the contact surface 311 of the raised part 31 at the rear of the metal grounding plate 3 to form a common grounded loop, but in actual application, it is also necessary to The shielding body 43 and the metal grounding plate 3 can be further welded together by laser welding to effectively improve the stability of the overall grounding structure. The metal grounding plate 3 is electrically connected to the shielding body 43 of the transmission cable 4 to form a common ground and has the function of grounding, and the shielding body 43 connects the first power wire 412 of the first wire group 41 and the second wire group 42 , the second power supply wire 413, the third power supply wire 422 and the fourth power supply wire 423 form shielding and isolation with the plurality of signal transmission wires, so as to provide the best shielding effect, and can simplify the manufacturing because there is no need to configure the printed circuit board for connection The procedure and saving of man-hours and costs for assembly can also effectively reduce the occupied volume to reduce the overall height and make it thinner, so that it can be more widely used in thin and light electronic products.

Then, the shielding shell 5 can be covered and positioned outside the insulating body 1, and the docking portion 12 can be extended into the insertion space 50 to form a suspended state, and the grounding elastic pieces 51 of the shielding shell 5 can be respectively overlapped with the abutting surfaces 511. Connected to the shield body 43 at the periphery of the first wire group 41 and the second wire group 42 of the transmission cable 4, and at the same time, the upper cover plate 25 made of the outer metal material of the first terminal seat 23 and the second terminal seat 24 and The lower cover plate 26 is in contact with the inner wall of the shielding case 5 by resisting the elastic pieces 252 and 262, so that the shielding case 5 can form a common grounding circuit with the metal grounding plate 3 through the shielding body 43. When the first electrical module 2 When the first terminal group 21 and the second terminal group 22 transmit high-frequency signals, the electromagnetic wave interference (EMI) and crosstalk interference formed between them can be inductively absorbed by the metal ground plate 3, and then guided by the shielding body 43 and transmitted to the shielding shell body 5 for ground release, and the first power wire 412, the second power wire 413, the third power wire 422 and the fourth power wire 423 can be shielded and isolated from the plurality of signal transmission wires through the shielding body 43 to effectively prevent Due to the lack of power noise interference caused by the close distance, at the same time, the electromagnetic wave and crosstalk interference generated during high-frequency signal transmission are suppressed, thereby making the overall signal transmission quality more stable and reliable.

Moreover, outside the shielding shell 5 are the first shell 61 and the second shell 62 further combined with the positioning member 6, and the contact springs 612, 622 at the opposite inner sides of the first shell 61 and the second shell 62 are respectively opposed to the shielding. On the housing 5, the extension pieces 613, 623 are combined with the circuit board or the casing to form a common grounded loop by means of the fixing elements (not shown) passed through the through holes 614, 624 to form a common grounding circuit, so that the shielding The housing 5 cooperates with the positioning member 6 to guide the electromagnetic wave and noise interference generated around the USB connector to the ground terminal of the circuit board or the casing for release, so as to improve the effect of grounding and shielding.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (10)

1. A grounding structure of a USB connector, characterized in that: an insulating body, an electrical module, a metal grounding plate and a transmission cable are included, wherein: The insulating body has a base, and a docking portion is provided at the front of the base, and an electrical module is combined with the insulating body; One side of the first terminal group and the second terminal group included in the electrical module are respectively provided with a first contact portion and a second contact portion that pass through and are exposed on the upper and lower sides of the docking portion, and are located between the first terminal group and the second terminal group. The two terminal groups are respectively provided with a first connection part and a second connection part on the other side of the first contact part and the second contact part; The metal grounding plate is combined inside the insulating body and forms shielding and isolation between the first terminal group and the second terminal group of the electrical module; The transmission cable includes a first wire group and a second wire group respectively connected to the first connection part of the first terminal group and the second terminal group to form an electrical connection on the second connection part, and the first wire group and the second wire group are electrically connected. A shielding body electrically connected to the metal ground plate to form a common ground is positioned around the second wire group. 2. The grounding structure of the USB connector according to claim 1, characterized in that: the insulating body is covered with a shielding shell positioned outside, and inside the shielding shell there is a butt joint that can be inserted into it to form a suspension The upper and lower sides at the rear of the shielding shell are provided with a plurality of grounding shrapnels that are bent and extended inwardly and overlapped with the shielding body respectively to form a ground connection. 3. The grounding structure of the USB connector according to claim 2, characterized in that: the first terminal base and the second terminal base of the electrical module are respectively covered with an upper cover made of metal material and combined with the The lower cover below the upper cover is provided with a plurality of resisting shrapnels on the upper cover and the lower cover respectively, which collide with the shielding shell to form a ground. 4. The grounding structure of the USB connector according to claim 2, characterized in that: the outside of the shielding shell is further combined with a first shell of a positioning member and a second shell below the first shell, and at the second The first shell and the second shell are respectively provided with a plurality of contact elastic pieces which are in contact with the shielding shell to form a ground. 5. The grounding structure of the USB connector according to claim 4, characterized in that: the front side of the first shell of the positioning member and the front side of the second shell are turned outwards and have flat extension pieces that abut against each other, and The two extension pieces are respectively provided with opposite perforations. 6. The grounding structure of the USB connector according to claim 1, characterized in that: an accommodating space is formed at the rear of the base of the insulating body, and an accommodating space is formed at the upper and lower sides behind the metal grounding plate. The raised part in the space, and the surface of the raised part is formed with a contact surface that can be overlapped by the shielding body to form a ground. 7. The grounding structure of the USB connector according to claim 6, characterized in that: the two sides of the raised part of the metal grounding plate extend backward and pass through the periphery of the first terminal seat and the second terminal seat of the electrical module The fixing piece at the first terminal base, the second terminal base and the outside of the fixing piece are integrally formed with an insulating body by mosaic injection, and a slot is formed between the two fixing pieces and the raised part. 8. The grounding structure of the USB connector according to claim 1, characterized in that: the first terminal seat and the second terminal seat of the electrical module are respectively formed on the outer surfaces opposite to the rear for the first wire group, the second A plurality of first positioning slots and second positioning slots for positioning the wire set and connecting with the first connecting portion of the first terminal set and the second connecting portion of the second terminal set. 9. The grounding structure of the USB connector according to claim 1, characterized in that: the transmission cable includes a first wire group and a second wire group each having twelve wires in the upper and lower rows, and the first wire The first, fourth, ninth, and twelfth wires in the group are the first ground wire, the first power wire, the second power wire, and the second ground wire in sequence, and the rest of the wires are signal transmission wires , and the second wire group is the third ground wire, the third power wire, the fourth power wire and the fourth The grounding wire, the rest of the wires are signal transmission wires, and the upper and lower sides of the shielding body are provided with the first power wire, the second power wire, the third power wire and the fourth power wire straddling it and the complex signal transmission wires A plurality of metal plates forming shielding and isolation. 10. The grounding structure of the USB connector according to claim 9, characterized in that: the shielding body has four metal plates respectively positioned at the periphery of the signal transmission wires of the first wire group and the second wire group to form a stacked arrangement up and down .