CN114678719A

CN114678719A - Type-c connector

Info

Publication number: CN114678719A
Application number: CN202210232535.6A
Authority: CN
Inventors: 杨松; 朱送良
Original assignee: Dongguan Haorun Precision Electronic Co ltd
Current assignee: Dongguan Haorun Precision Electronic Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-28

Abstract

The invention relates to a type-c connector, wherein an insulating shell of the type-c connector is formed by combining an upper insulating block and a lower insulating block, a butt joint part at the front end and a plate connecting part at the rear end are obtained, an upper row of terminals and the upper insulating block are integrally injected, a lower row of terminals and the lower insulating block are integrally injected, a shielding plate is embedded between the upper insulating block and the lower insulating block, a first iron shell wraps the butt joint part of the insulating shell, and a second iron shell wraps the plate connecting part of the insulating shell and is in conductive connection with the first iron shell; the circuit board is hidden in the second iron shell and is connected with the upper row of terminals, the lower row of terminals and the shielding sheet in a welding mode. The terminal and the shell are formed by one-time injection molding, which is beneficial to high-frequency characteristic impedance, insertion loss, return loss, crosstalk and the like, and are divided into two same halves to be combined, so that the manufacturing cost is greatly reduced, and the manufacture and the assembly are convenient. The iron shell and the EMI sheet are integrated together, so that the manufacturing and assembly of the middle EMI sheet are reduced; the number of parts is small, tolerance accumulation caused by assembly is reduced, and the assembly stability and the use performance of the electric connector are improved.

Description

Type-c connector

Technical Field

The invention relates to the technical field of electric connectors, in particular to a data transmission type-c connector.

Background

With the development of science and technology, various electronic products are on the rise, and accordingly, various connectors for different electronic products are produced, and a USB connector is one of the most widely used and popular connectors in an electrical connector, and most electronic devices are equipped with the USB connector. At present, due to the characteristic of a double-sided pluggable port of the USB TYPE-C connector, unlike the old USB port, power can only be transmitted in a single direction, power transmission of the TYPE-C port is bidirectional, and the USB TYPE-C connector can be widely applied to mobile devices such as smart phones and notebooks and can be used for charging, data transmission and the like.

The new generation of USB TYPE-C connector has smaller size and higher requirements on mechanical performance and electrical performance, and if higher transmission rate is required; however, since the new generation USB TYPE-C connector has small size, a large number of terminals and limited space, in order to meet the functional requirements, the new generation USB TYPE-C connector not only has a complex structure, but also is relatively complicated to manufacture and has high investment cost.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a type-c connector which is simplified in structure, convenient to manufacture and assemble and capable of meeting functional requirements.

In order to achieve the purpose, the invention adopts the following technical scheme:

a type-c connector having:

the insulating housing is formed by combining an upper insulating block and a lower insulating block, a butt joint part at the front end and a connecting plate part at the rear end are obtained, a butt joint cavity extending out of the butt joint part forwards is arranged in the butt joint part, and an accommodating cavity extending out of the connecting plate part backwards is arranged in the connecting plate part;

the upper row of terminals are integrated with the upper insulating block in an injection molding mode, each upper row of terminals is provided with a first contact part at the front end, a first welding part at the rear end and a first fixing part for connecting the first contact part and the first welding part, the first fixing part is fixedly connected with the upper insulating block, the first contact part extends into the butt joint cavity, and the first welding part extends backwards into the accommodating cavity of the butt joint plate part; the upper row of terminals has at least one first ground terminal;

the lower row of terminals and the lower insulating block are integrally molded, each lower row of terminals is provided with a second contact part at the front end, a second welding part at the rear end and a second fixing part for connecting the second contact part and the second welding part, the second fixing part is fixedly connected with the lower insulating block, the second contact part extends into the butt joint cavity and is vertically opposite to the first contact part, and the second welding part extends backwards into the accommodating cavity of the connecting plate part and is vertically opposite to the first welding part; the lower row of terminals is provided with at least one second grounding terminal;

A shield plate embedded between the upper insulating block and the lower insulating block and electrically connected to the first ground terminal and the second ground terminal for improving transmission performance between the upper row of terminals and the lower row of terminals; the shielding sheet is provided with a pair of clamping hooks and a pair of welding feet, the clamping hooks extend to the butt joint cavity and are respectively arranged on the left side and the right side of the butt joint cavity, and the welding feet extend backwards into the accommodating cavity of the connecting plate part and are respectively arranged together with the first welding part and the second welding part;

the first iron shell wraps the butt joint part of the insulating shell, the front end of the first iron shell is provided with inward-folded elastic arms which are vertically arranged, the rear end of the first iron shell is provided with an extending piece, and the inward-folded elastic arms extend into the butt joint cavity; the extending sheet at least covers the upper and lower side surfaces of the connecting plate part;

the second iron shell wraps the connecting plate part of the insulating shell and is in conductive connection with the first iron shell;

and the circuit board is hidden in the second iron shell and partially inserted into the accommodating cavity of the connecting plate part, and the first welding part of the upper row of terminals, the second welding part of the lower row of terminals and the welding feet of the shielding sheets are respectively welded on the upper side surface and the lower side surface of the circuit board.

In the above solution, the upper insulating block has a first through groove communicating with the butt-joint cavity, the first contact portion of the upper row of terminals is aligned with the first iron case through the first through groove, and a medium between the first contact portion and the first iron case is air; the lower insulating block is provided with a second through groove communicated with the butt joint cavity, the second contact part of the lower row of terminals is expected to the first iron shell through the second through groove, and a medium between the second contact part and the first iron shell is air.

According to the scheme, a step relation of height difference is formed between the butt joint part and the plate connecting part of the insulating shell, the butt joint part is also provided with a first hollow groove, and the first hollow groove is respectively in a hollow structure on the upper insulating block and the lower insulating block; the connecting plate part is provided with a second hollow groove, and the second hollow groove is respectively provided with a hollow structure on the upper insulating block and the lower insulating block and forms a front-back interval with the first hollow groove; the upper side surface of the first fixed part of the upper row terminal is partially exposed out of the insulating shell through the first hollow groove and the second hollow groove and faces the first iron shell, and the lower side surface of the first fixed part of the upper row terminal is partially exposed out of the insulating shell through the first hollow groove and the second hollow groove and faces the shielding sheet; the lower side surface of the second fixed part of the lower row of terminals is partially exposed out of the insulating shell through the first hollow-out groove and the second hollow-out groove and faces the first iron shell, and the upper side surface of the second fixed part of the lower row of terminals is partially exposed out of the insulating shell through the first hollow-out groove and the second hollow-out groove and faces the shielding sheet; the first fixing part and the second fixing part at the first hollow-out groove and the second hollow-out groove respectively have air as a medium between the first iron shell and the shielding sheet.

The scheme is further that the upper insulating block and the lower insulating block are combined in a buckling mode, a first hook and a first flange are arranged at the rear end of the upper insulating block and are respectively arranged on the left side and the right side of the accommodating cavity, a first hanging table is arranged on the first flange, a second hook and a second flange are arranged at the rear end of the lower insulating block and are respectively arranged on the left side and the right side of the accommodating cavity, and a second hanging table is arranged on the second flange; the first hook is buckled with the second hanging platform, and the second hook is buckled with the first hanging platform; the first flange and the second flange form a vertical dislocation relation on the left side and the right side of the containing cavity, the circuit board is clamped by the first flange and the second flange vertically, and the circuit board is limited by the first hook and the second hook respectively by abutting against the left side and the right side of the circuit board.

The scheme is further that the upper side surface and the lower side surface of the shielding sheet are respectively and electrically connected with a first grounding terminal of the upper row of terminals and a second grounding terminal of the lower row of terminals through a first hollow groove, the first grounding terminal is provided with a first elastic pressing foot protruding downwards, the second grounding terminal is provided with a second elastic pressing foot protruding upwards, and the electrical connection is established through the upper clamping shielding sheet and the lower clamping shielding sheet formed by the first elastic pressing foot and the second elastic pressing foot.

Above-mentioned scheme is further, the extension piece extension of first iron-clad covers the second fretwork groove on the fishplate bar portion, and the second iron-clad connects the plate portion with extending the laminated stack of lamella in fishplate bar portion department, and the front end of second iron-clad is equipped with interior book buckle, and this interior book buckle is in the first iron-clad of step change department lock joint between butt joint portion and fishplate bar portion.

In the scheme, the upper insulating block is further provided with a first positioning pin and a first positioning hole facing the lower insulating block, and the first positioning pin and the first positioning hole are respectively arranged in the butt joint part and the plate receiving part and are crossed and staggered; the lower insulating block is also provided with a second positioning pin and a second positioning hole which face the upper insulating block, and the second positioning pin and the second positioning hole are respectively arranged in the butt joint part and the joint plate part and are crossed and staggered; the first positioning pin is connected with the second positioning hole in an inserting mode, the second positioning pin is connected with the first positioning hole in an inserting mode, and a part of the first positioning pin and a part of the second positioning pin penetrate through a preset through hole in the shielding plate.

The insulating shell is formed by combining the upper insulating block and the lower insulating block, the upper row of terminals and the lower row of terminals are respectively integrated with the upper insulating block and the lower insulating block in an injection molding mode, the periphery of the insulating shell is wrapped by the first iron shell and the second iron shell, and the shielding sheet is embedded between the upper insulating block and the lower insulating block, so that the following beneficial effects are achieved:

1. The terminal is formed by one-time injection Molding (Molding) with the shell and is divided into two same halves to be combined, so that the manufacturing cost can be greatly reduced, and the terminal is convenient to manufacture, assemble and connect.

2. The iron shell and the EMI sheet are integrated together, so that the manufacturing and assembly of the middle EMI sheet are reduced.

3. The electric connector has the advantages that the number of parts is small, the manufacturing and the assembly are convenient, the tolerance accumulation caused by the assembly is reduced, the structure is optimized on the upper insulating block and the lower insulating block, the transmission performance of the upper row of terminals and the lower row of terminals is improved, and the assembly stability and the use performance of the electric connector are improved.

4. The terminal is formed by one-time injection Molding (Molding) with the shell to obtain tight wrapping shielding, which is beneficial to high-frequency characteristic impedance, insertion loss, return loss, crosstalk and the like.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the internal structure of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the combination of the upper and lower insulating blocks of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the embodiment of FIG. 4 from another perspective;

FIG. 6 is a schematic diagram of a circuit board assembly of the embodiment of FIG. 1;

fig. 7 is a rear view of the embodiment of fig. 6.

The specific implementation mode is as follows:

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Referring to fig. 1, 2, 3, 4, 5, 6 and 7, which are schematic views of a preferred embodiment of the present invention, the present invention relates to a type-c connector having an insulative housing 1, an upper row of terminals 2, a lower row of terminals 3, a shield plate 4, a first iron shell 5, a second iron shell 6 and a circuit board 7. The insulating housing 1 is composed of an upper insulating block 11 and a lower insulating block 12, a butt joint part 13 at the front end and a connecting plate part 14 at the rear end are obtained, and a step relation of height difference is formed between the butt joint part 13 and the connecting plate part 14 in the embodiment, so that the structural appearance size and the assembly requirement are met. In the embodiment, the upper insulating block 11 and the lower insulating block 12 are preferably the same in structural form, so that the manufacturing is convenient, and the development cost of the mold is saved. The abutting portion 13 is provided with an abutting cavity 131 extending forwards out of the abutting portion 13, and the connecting plate portion 14 is provided with a containing cavity 141 extending backwards out of the connecting plate portion 14. The upper row of terminals 2 and the upper insulating block 11 are molded as a whole to form a first terminal module. The upper row terminal 2 is provided with a first contact part 21 at the front end, a first welding part 22 at the rear end and a first fixing part 23 for connecting the first contact part 21 and the first welding part 22, the first fixing part 23 is fixedly connected with the upper insulating block 11, and the first contact part 21 extends into the butt-joint cavity 131 for plug-in connection; the first welding part 22 extends backwards into the accommodating cavity 141 of the welding plate part 14 for welding; the upper row of terminals 2 has at least one first ground terminal 24, and as shown in the figure, there are two first ground terminals 24 in the upper row of terminals 2, and the two first ground terminals 24 are respectively disposed at the head and tail positions of the arrangement direction of the upper row of terminals 2. The lower row of terminals 3 and the lower insulating block 12 are integrally injection molded to form a second terminal module. The lower row terminal 3 has a second contact portion 31 at the front end, a second soldering portion 32 at the rear end, and a second fixing portion 33 connecting the second contact portion and the second soldering portion, the second fixing portion 33 is fixedly connected with the lower insulating block 12, the second contact portion 31 extends into the butt-joint cavity 131 and is opposite to the first contact portion 21 in the vertical direction for plug-in connection; the second welding portion 32 extends rearward into the receiving cavity 141 of the joint plate portion 14 and is formed to be vertically opposite to the first welding portion 22 for welding connection. The lower row of terminals 3 has at least one second ground terminal 34, and as shown in the figure, there are two second ground terminals 34 in the lower row of terminals 3, and the two second ground terminals 34 are respectively disposed at the first and last positions of the arrangement direction of the lower row of terminals 3. The upper row terminal 2 and the lower row terminal 3 further comprise power supply terminals, signal terminals, reserved terminals and the like according to functional design, wherein the signal terminals comprise differential signal terminals, low-speed signal terminals and the like, and are arranged in position to meet the functional requirements of the electric connector. The upper row of terminals 2 and the lower row of terminals 3 form an up-down relationship and cooperate together to form a plug interface without front and back sides. The shielding plate 4 is embedded between the upper insulating block 11 and the lower insulating block 12 and electrically connected with the first ground terminal 24 and the second ground terminal 34, so as to improve the transmission performance between the upper row of terminals and the lower row of terminals, increase the grounding effect, prevent the transmission crosstalk between the terminals, and meet the high-frequency requirement. In the present embodiment, the shielding plate 4 has a pair of hooks 41 and a pair of solder tails 42, the hooks 41 extend into the mating cavity 131 and are disposed on the left and right sides of the mating cavity, and the solder tails 42 extend backward into the receiving cavities 141 of the plate portion 14 and are aligned with the first welding portion 22 and the second welding portion 32, respectively, so as to facilitate the welding operation. The first iron shell 5 wraps the butt joint part 13 of the insulating shell 1, the front end of the first iron shell 5 is provided with an inward-folded elastic arm 51 which is arranged up and down, the rear end of the first iron shell 5 is provided with an extending piece 52, and the inward-folded elastic arm 51 extends into the butt joint cavity 131, so that when an external connector is inserted into the butt joint cavity 131, the inward-folded elastic arm 51 increases the plugging performance and the grounding performance, and the use of the electric connector is ensured; the extension piece 52 covers at least the upper and lower side surfaces of the panel part 14, further increasing the shielding protection; the first iron shell 5 not only has the fixing and wrapping effects, but also can achieve the EMI effect, and is simple in structure and convenient to manufacture and assemble. This second iron casing 6 parcel insulating casing 1 connect board portion 14 and form the conducting connection with first iron casing 5, form the ground connection system, when convenient preparation and equipment, still promote the product quality. The circuit board 7 is hidden in the second iron shell 6 and partially inserted into the receiving cavity 141 of the contact plate portion 14, and the first soldering portion 22 of the upper row terminal 2, the second soldering portion 32 of the lower row terminal 3 and the solder leg 42 of the shielding plate 4 are respectively soldered on the upper and lower side surfaces of the circuit board 7, thereby forming an effect of clamping the circuit board 7. This structure can conveniently be worked a telephone switchboard to connect stably, the rear end of second iron-clad 6 still is equipped with corresponding riveting portion for fixed connection wire increases electric connector's mechanical structure nature and life.

Referring to fig. 2, 3, 4, 5 and 6, in the present embodiment, the upper insulation block 11 has a first through groove 111 communicating with the butt-joint cavity 131, the first contact portion 21 of the upper row terminal 2 is aligned with the first iron case 5 through the first through groove 111, and a medium between the first contact portion 21 and the first iron case 5 is air; the lower insulating block 12 has a second through groove 121 communicating with the mating cavity 131, the second contact portion 31 of the lower row of terminals 3 is aligned with the first iron shell 5 through the second through groove 121, and the medium between the second contact portion 31 and the first iron shell 5 is air. The structure can reduce the dielectric coefficient, and achieve the purpose of adjusting the impedance characteristic between the upper row of terminals and the lower row of terminals, thereby improving the transmission rate of the electric connector. In this embodiment, the abutting portion 13 of the insulating housing is further provided with a first hollow-out groove 132, and the first hollow-out groove 132 is respectively in a hollow-out structure on the upper insulating block 11 and the lower insulating block 12; the connecting plate part 14 is provided with a second hollow-out groove 142, and the second hollow-out groove 142 is respectively in a hollow-out structure on the upper insulating block 11 and the lower insulating block 12 and forms a front-back interval with the first hollow-out groove 132; the upper side surface of the first fixing portion 23 of the upper row terminal 2 partially exposes the insulating housing 1 through the first hollow groove 132 and the second hollow groove 142 and faces the first iron case 5, and the lower side surface of the first fixing portion 23 of the upper row terminal 2 partially exposes the insulating housing 1 through the first hollow groove 132 and the second hollow groove 142 and faces the shielding sheet 4; the lower side surface of the second fixing portion 33 of the lower row of terminals 3 also partially exposes the insulating housing 1 through the first hollow-out groove 132 and the second hollow-out groove 142 and faces the first iron case 5, and the upper side surface of the second fixing portion 33 of the lower row of terminals 3 partially exposes the insulating housing 1 through the first hollow-out groove 132 and the second hollow-out groove 142 and faces the shielding plate 4; the medium between the first fixing portion 23 and the second fixing portion 33 at the first hollow-out groove 132 and the second hollow-out groove 142, and the first iron shell 5 and the shielding plate 4 is air. The structure further reduces the dielectric coefficient in a limited space, so as to adjust the impedance characteristic between the upper row of terminals and the lower row of terminals, thereby improving the transmission rate of the electric connector.

The upper and lower side surfaces of the shielding plate 4 are electrically connected with the first grounding terminal 24 of the upper row terminal 2 and the second grounding terminal 34 of the lower row terminal 3 through the first hollow-out groove 132, specifically, the first grounding terminal 24 is provided with a first elastic pressing foot 241 protruding downwards, the second grounding terminal 34 is provided with a second elastic pressing foot 341 protruding upwards, in this embodiment, the first elastic pressing foot 241 and the second elastic pressing foot 341 are symmetrically arranged up and down, the electrical connection is established by the upper and lower clamping shielding plate 4 formed by the first elastic pressing foot 241 and the second elastic pressing foot 341, and the first elastic pressing foot 241 and the second elastic pressing foot 341 can be constructed in a tearing manner, so that the structure is simple, the grounding effectiveness and stability are increased, and the product structure is also simplified. The extension piece 52 of the first iron shell 5 extends to cover the second hollow-out groove 142 on the connection plate portion 14, the second iron shell 6 covers the connection plate portion 14 in a stacking manner with the extension piece 52 at the connection plate portion 14, and the front end of the second iron shell 6 is provided with an inward-folding buckle 61, and the inward-folding buckle 61 is used for buckling the first iron shell 5 at the step change position between the butt joint portion 13 and the connection plate portion 14. Extension piece 52 in this embodiment still with connect the barb of plate portion 14 to articulate, reach and prevent moving back the connection, increase first iron-clad 5 parcel intensity and steadiness. The inward-folding buckle 61 of the second iron shell 6 is clamped and communicated with the first iron shell 5, in this embodiment, the second iron shell 6 is further provided with a top stop part 62, the top stop part 62 is obtained by indenting or tearing the second iron shell 6 and is used for supporting the joint plate part 14, and the inward-folding buckle 61 is matched to establish stable connection between the second iron shell 6 and the insulating shell 1.

Referring to fig. 2, 3, 4, 5, 6, and 7, in the present embodiment, the upper insulating block 11 and the lower insulating block 12 are combined by buckling, a first hook 112 and a first flange 113 are disposed at the rear end of the upper insulating block 11 and are separately disposed at the left and right sides of the accommodating cavity 141, a first hanging table 114 is disposed on the first flange 113, a second hook 122 and a second flange 123 are disposed at the rear end of the lower insulating block 12 and are separately disposed at the left and right sides of the accommodating cavity 141, and a second hanging table 124 is disposed on the second flange 123; the first hook 112 and the second hanging platform 124 form a buckling connection, and the second hook 122 and the first hanging platform 114 form a buckling connection; the first flange 113 and the second flange 123 form a vertical dislocation relation on the left side and the right side of the accommodating cavity 141, and the first flange 113 and the second flange 123 clamp the circuit board 7 vertically, the first hook 112 and the second hook 122 limit the circuit board by abutting against the left side and the right side of the circuit board 7, and the joint parts of the circuit board 7 and the first hook 112 and the second hook 122 are gap structures. The structure not only facilitates the combination of the upper insulating block 11 and the lower insulating block 12, but also has the effects of limiting, positioning and fixing the assembly of the circuit board 7, the components are tightly combined, the mechanical structure is good, and the quality of the electric connector is improved. The upper insulating block 11 is further provided with a first positioning pin 115 and a first positioning hole 116 facing the lower insulating block 12, and the first positioning pin 115 and the first positioning hole 116 are respectively arranged in the butt joint part 13 and the butt joint part 14 region and are crossed and staggered; the lower insulating block 12 is further provided with a second positioning pin 125 and a second positioning hole 126 facing the upper insulating block 11, and the second positioning pin 125 and the second positioning hole 126 are respectively arranged in the regions of the butt-joint part 13 and the butt-joint plate part 14 and are crossed and staggered; the first positioning pin 115 is inserted into the second positioning hole 126, the second positioning pin 125 is inserted into the first positioning hole 116, and a part of the first positioning pin 115 and a part of the second positioning pin 125 pass through the through hole 43 preset on the shielding plate 4. The structure further increases the combination structure of the upper insulating block 11 and the lower insulating block 12, and simultaneously, the shielding sheet 4 is accurately and stably embedded between the upper insulating block 11 and the lower insulating block 12, so that a good shielding effect is achieved.

1. the terminal is formed by one-time injection Molding (Molding) with the shell and is divided into two same halves to be combined, so that the manufacturing cost can be greatly reduced, and the assembly and the connection are convenient.

It is to be understood that the foregoing detailed description of the present invention has been provided only for the purpose of illustrating the technical spirit and features of the present invention, and the present invention is not limited thereto.

Claims

1. A type-c connector, comprising:

the insulation shell (1) is formed by combining an upper insulation block (11) and a lower insulation block (12), a butt joint part (13) at the front end and a connecting plate part (14) at the rear end are obtained, a butt joint cavity (131) extending out of the butt joint part (13) forwards is arranged in the butt joint part (13), and an accommodating cavity (141) extending out of the connecting plate part (14) backwards is arranged in the connecting plate part (14);

the upper row of terminals (2), the upper row of terminals (2) and the upper insulating block (11) are molded into a whole, the upper row of terminals (2) are provided with a first contact part (21) at the front end, a first welding part (22) at the rear end and a first fixing part (23) for connecting the first contact part (21) and the first welding part (22), the first fixing part (23) is fixedly connected with the upper insulating block (11), the first contact part (21) extends into the butt joint cavity (131), and the first welding part (22) extends backwards into the accommodating cavity (141) of the butt joint part (14); the upper row of terminals (2) is provided with at least one first grounding terminal (24);

the lower-row terminal (3) is integrated with the lower insulating block (12) in an injection molding mode, the lower-row terminal (3) is provided with a second contact part (31) at the front end, a second welding part (32) at the rear end and a second fixing part (33) for connecting the second contact part and the second welding part, the second fixing part (33) is fixedly connected with the lower insulating block (12), the second contact part (31) extends into the butt joint cavity (131) and is vertically opposite to the first contact part (21), and the second welding part (32) extends backwards into the accommodating cavity (141) of the butt joint part (14) and is vertically opposite to the first welding part (22); the lower row of terminals (3) is provided with at least one second grounding terminal (34);

A shield plate (4), wherein the shield plate (4) is embedded between the upper insulating block (11) and the lower insulating block (12) and is electrically connected with the first grounding terminal (24) and the second grounding terminal (34) for improving the transmission performance between the upper row of terminals and the lower row of terminals; the shielding sheet (4) is provided with a pair of clamping hooks (41) and a pair of welding feet (42), the clamping hooks (41) extend to the butt joint cavity (131) and are respectively arranged on the left side and the right side of the butt joint cavity, and the welding feet (42) extend backwards into the accommodating cavity (141) of the connecting plate part (14) and are respectively arranged together with the first welding part (22) and the second welding part (32);

the first iron shell (5), the butt joint part (13) of the insulating shell (1) is wrapped by the first iron shell (5), the front end of the first iron shell (5) is provided with inward-folded elastic arms (51) which are arranged up and down, the rear end of the first iron shell (5) is provided with an extending piece (52), and the inward-folded elastic arms (51) extend into the butt joint cavity (131); the extension piece (52) at least covers the upper and lower side surfaces of the connecting plate part (14);

the second iron shell (6), the second iron shell (6) wraps the connecting plate part (14) of the insulating shell (1) and is in conductive connection with the first iron shell (5);

And the circuit board (7) is hidden in the second iron shell (6) and partially inserted into the accommodating cavity (141) of the connecting plate part (14), and the first welding part (22) of the upper row of terminals (2), the second welding part (32) of the lower row of terminals (3) and the welding pins (42) of the shielding plate (4) are respectively welded on the upper side surface and the lower side surface of the circuit board (7).

2. A type-c connector according to claim 1, wherein the upper insulating block (11) has a first through groove (111) communicating with the mating cavity (131), the first contact portion (21) of the upper row terminal (2) is aligned with the first iron shell (5) through the first through groove (111), and the medium between the first contact portion (21) and the first iron shell (5) is air; the lower insulating block (12) is provided with a second through groove (121) communicated with the butt joint cavity (131), a second contact part (31) of the lower row of terminals (3) is expected to penetrate through the second through groove (121) and the first iron shell (5), and a medium between the second contact part (31) and the first iron shell (5) is air.

3. The type-c connector according to claim 1, wherein a step relationship of height difference is formed between the butting portion (13) and the connecting plate portion (14) of the insulating housing (1), the butting portion (13) is further provided with a first hollowed-out groove (132), and the first hollowed-out groove (132) is respectively of a hollowed-out structure on the upper insulating block (11) and the lower insulating block (12); the connecting plate part (14) is provided with a second hollow-out groove (142), and the second hollow-out groove (142) is respectively in hollow-out structures on the upper insulating block (11) and the lower insulating block (12) and forms a front-back interval with the first hollow-out groove (132); the upper side surface of the first fixing part (23) of the upper row terminal (2) is partially exposed out of the insulating shell (1) through the first hollow-out groove (132) and the second hollow-out groove (142) and faces the first iron shell (5), and the lower side surface of the first fixing part (23) of the upper row terminal (2) is partially exposed out of the insulating shell (1) through the first hollow-out groove (132) and the second hollow-out groove (142) and faces the shielding sheet (4); the lower side surface of the second fixing part (33) of the lower row of terminals (3) is partially exposed out of the insulating shell (1) through the first hollow-out groove (132) and the second hollow-out groove (142) and faces the first iron shell (5), and the upper side surface of the second fixing part (33) of the lower row of terminals (3) is partially exposed out of the insulating shell (1) through the first hollow-out groove (132) and the second hollow-out groove (142) and faces the shielding sheet (4); the medium between the first fixing part (23) and the second fixing part (33) at the first hollow-out groove (132) and the second hollow-out groove (142) and the first iron shell (5) and the medium between the first fixing part and the second fixing part and the shielding sheet (4) are air respectively.

4. The type-c connector according to claim 1, 2 or 3, wherein the upper insulating block (11) and the lower insulating block (12) are combined by buckling, a first hook (112) and a first flange (113) are arranged at the rear end of the upper insulating block (11) and are respectively arranged at the left side and the right side of the accommodating cavity (141), a first hanging table (114) is arranged on the first flange (113), a second hook (122) and a second flange (123) are arranged at the rear end of the lower insulating block (12) and are respectively arranged at the left side and the right side of the accommodating cavity (141), and a second hanging table (124) is arranged on the second flange (123); the first hook (112) is connected with the second hanging platform (124) in a buckling way, and the second hook (122) is connected with the first hanging platform (114) in a buckling way; the first flange (113) and the second flange (123) form a vertical dislocation relation on the left side and the right side of the accommodating cavity (141), the circuit board (7) is clamped by the first flange (113) and the second flange (123) vertically, and the circuit board is limited by the first hook (112) and the second hook (122) respectively abutting against the left side and the right side of the circuit board (7).

5. The type-c connector according to claim 3, wherein the upper and lower side surfaces of the shielding plate (4) are electrically connected with the first grounding terminal (24) of the upper row of terminals (2) and the second grounding terminal (34) of the lower row of terminals (3) through the first hollow-out groove (132), the first grounding terminal (24) is provided with a first elastic pressing foot (241) protruding downwards, the second grounding terminal (34) is provided with a second elastic pressing foot (341) protruding upwards, and the electrical connection is established by the upper and lower clamping of the shielding plate (4) formed by the first elastic pressing foot (241) and the second elastic pressing foot (341).

6. A type-c connector according to claim 3, wherein the extending piece (52) of the first iron shell (5) extends to cover the second hollow groove (142) on the connecting plate portion (14), the second iron shell (6) and the extending piece (52) are laminated to cover the connecting plate portion (14) at the connecting plate portion (14), and the front end of the second iron shell (6) is provided with an inward-folding buckle (61), and the inward-folding buckle (61) buckles the first iron shell (5) at the step change position between the butting portion (13) and the connecting plate portion (14).

7. The type-c connector as claimed in claim 4, wherein the upper dielectric block (11) is further provided with a first positioning pin (115) and a first positioning hole (116) facing the lower dielectric block (12), and the first positioning pin (115) and the first positioning hole (116) are respectively arranged in the region of the butt joint portion (13) and the tab portion (14) and are staggered; the lower insulating block (12) is also provided with a second positioning pin (125) and a second positioning hole (126) facing the upper insulating block (11), and the second positioning pin (125) and the second positioning hole (126) are respectively arranged in the butt joint part (13) and the joint plate part (14) and are crossed and staggered; the first positioning pin (115) is in plug-in connection with the second positioning hole (126), the second positioning pin (125) is in plug-in connection with the first positioning hole (116), and a part of the first positioning pin (115) and a part of the second positioning pin (125) penetrate through a through hole (43) which is preset in the shielding sheet (4).