CN108448287B

CN108448287B - Electrical connector

Info

Publication number: CN108448287B
Application number: CN201810111175.8A
Authority: CN
Inventors: 蔡友华
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2020-01-31
Anticipated expiration: 2038-02-05
Also published as: CN108448287A

Abstract

The invention discloses an electric connector, which comprises an insulating body, a plurality of conductive terminals, a -th metallic piece, a -th extension part and a -th extension part, wherein the -th slot is formed by downwards recessing the insulating body, a -th -th side wall and a -th side wall are positioned on two opposite sides of the slot, the slot is used for inserting a butt-joint element, the conductive terminals are arranged on the -th side wall and the second side wall, each conductive terminal has an 7 contact part protruding into the slot and electrically connected with the butt-joint element, the conductive terminals comprise an -th terminal, the -th side wall is arranged on the -th side wall and positioned on the outermost side of the -end, the -th metallic piece coats the -th side wall, the -th metallic piece is coated with the -th guide part, the -th extension part is fixed on the second side wall, the -th extension part is not contacted with the conductive terminals and is arranged with the -second side wall, so that the electromagnetic transmission performance of the high.

Description

Electrical connector

Technical Field

The invention relates to electric connectors, in particular to electric connectors with good grounding effect.

Background

With the development of science and technology, electronic products are developed towards miniaturization and high performance, and the requirements on the transmission rate of the electronic products are higher and higher while the volume of the electronic products is reduced, so that the electric connector structure of the existing electronic products cannot meet the requirements on the transmission rate.

The conventional electric connectors include an insulative housing, a plurality of conductive terminals fixed to the insulative housing, and a metal housing covering the periphery of the insulative housing, each conductive terminal has a main body portion to fix the conductive terminal to the insulative housing, a contact portion extending upward from the main body portion for contacting an electronic component, and a soldering portion extending downward from the main body portion to solder the conductive terminal to a circuit board.

However, in the conventional electrical connector, only the metal housing shields external signal interference, but electromagnetic interference still exists between the conductive terminals, which does not meet the requirement on high frequency performance.

Therefore, it is necessary to design new electrical connectors to overcome the above problems.

Disclosure of Invention

In view of the problems encountered in the background art, the present invention provides electrical connectors capable of reducing electromagnetic interference between conductive terminals.

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

an electrical connector is characterized in that the electrical connector includes an insulating body having a 0 slot recessed downward from the insulating body and st nd side wall and rd side wall located at two opposite sides of the slot, the slot for receiving a docking element, a plurality of conductive terminals disposed on th side wall and the second side wall, each conductive terminal having contact portion protruding into the slot for electrical connection with the docking element, the plurality of conductive terminals including st th terminal, the th terminal disposed on the th side wall and located at the outermost side of the slot 1 end, a nd th metal piece covering the th side wall, the th metal piece having th guide portion, the th guide portion contacting the th terminal, and a second metal piece covering the second side wall, the second extension portion fixed to the second side wall, and the conductive terminal and the extension portion not facing the second side wall and the conductive terminal .

, the th metal piece is formed separately from the second metal piece.

, the th extending part is opposite to the th terminal.

step forward, from the surface of lateral wall is inwards sunken to establish and is formed the recess, the metalwork accept in the recess, the lateral wall has lug and is located the below of recess and connection the recess, fluting certainly the recess is inwards sunken to establish and is run through downwards the lug, leading connecting portion accept in the fluting.

, the metal piece has a main body part, the main body part is accommodated in the groove, the leading part is formed by bending and extending downwards from the bottom end of the main body part, and the side of the leading part is flush with the side of the main body part.

, the metal element has - protruding portion, the protruding portion is not contacted with the conductive terminal and is located at the outermost side of the two opposite ends of the metal element with the guiding portion.

, the metal piece has at least second protrusions, each second protrusion being out of contact with the conductive terminal and located between the lead and the protrusions.

, the metal part has at least second conductive parts, each second conductive part is corresponding to the corresponding conductive terminal on the side wall and contacts with the conductive terminal, and the second conductive part is located between the conductive part and the protruding part.

, the th metal piece has a plurality of second protrusions, the second protrusions are not in contact with the conductive terminals, wherein at least two adjacent second protrusions are disposed corresponding to the conductive terminals located on the th side wall in the same number and arranged in series.

, the metal element has a plurality of second conductive connection portions, each of the second conductive connection portions corresponds to and contacts with the corresponding conductive terminals on the side wall, wherein at least two adjacent second conductive connection portions correspond to the same number of conductive terminals on the side wall and are arranged in a continuous arrangement.

, the metal part has at least second conductive parts, each second conductive part is corresponding to the second conductive part and is located on the side wall, the conductive terminals contact with each other, the insulation body is provided with fool-proof parts in the slots, and the second conductive parts are correspondingly arranged on at least sides adjacent to the fool-proof parts.

, forming a notch inwardly recessed from the outer surface of the second sidewall, the second metal element being received in the notch, the second sidewall having a protrusion located below the notch and connected to the notch, the extending portion being fixed to the protrusion.

, the second metal piece has a base , the base is accommodated in the notch, the th extension is formed by extending downwards from the bottom end of the base, and the side of the th extension is flush with the side of the base.

, the second metal element has a second extension part, the second extension part is not in contact with the conductive terminal and is located at the outermost side of the two opposite ends of the second metal element respectively with the second extension part.

, the second metal piece has at least vias, each via is in contact with the corresponding conductive terminal on the second sidewall, and the vias are located between the extending portion and the second extending portion.

, the second metal element has a plurality of third extending portions, the third extending portions are not in contact with the conductive terminals, and at least two adjacent third extending portions are disposed corresponding to the conductive terminals that are located on the second sidewall and are continuously arranged in the same number.

, the second metal part has a plurality of third extending parts, the third extending parts are not in contact with the conductive terminals, the insulation body is provided with fool-proof parts in the slots, and the third extending parts are provided at two opposite sides adjacent to the fool-proof parts.

, the second metal piece has a plurality of conduction parts, each conduction part contacts with the corresponding conductive terminal on the second side wall, wherein at least two adjacent conduction parts are arranged corresponding to the same number of conductive terminals on the second side wall and arranged in succession.

Compared with the prior art, the electric connector has the following beneficial effects:

the th metal piece is wrapped on the th side wall, the second metal piece is wrapped on the second side wall and used for shielding electromagnetic interference of an external environment to the conductive terminals, the th conductive connection part is in contact with the th terminal and used for enhancing the grounding function of the th terminal, reducing the electromagnetic interference between the conductive terminals and ensuring the high-frequency transmission performance of the electric connector, the th extension part is not in contact with the conductive terminals and is arranged opposite to the th conductive connection part, and the th extension part is fixed with the second side wall so as to fix the second metal piece on the second side wall.

[ description of the drawings ]

Fig. 1 is a perspective view of an electrical connector of the present invention prior to mating with a mating component;

fig. 2 is an exploded perspective view of the electrical connector of fig. 1;

fig. 3 is an exploded perspective view of the electrical connector of fig. 1 taken at another angle of ;

FIG. 4 is a front view of the electrical connector of FIG. 1;

fig. 5 is a cross-sectional view of the electrical connector of fig. 4 taken along the direction a-a;

FIG. 6 is a cross-sectional view of the electrical connector of FIG. 4 taken along the direction B-B;

fig. 7 is an enlarged view of a portion a of fig. 6.

Detailed description of the embodiments reference is made to the accompanying drawings in which:

electrical connector 100	Insulating body 1	Socket 11	th side wall 12
				Groove 121	Bump 122	Slot 123	Second side wall 13
Notch 131	Convex part 132	Opening 133	Terminal groove 14
				th groove 14A	Fool-proof part 15	End wall 16	Conductive terminal 2
th terminal 2A	Body part 21	Contact part 22	Welding part 23
				th metal part 3	Main body 31	th guide part 32	-th protrusion 33
Second lead-in part 34	Second projecting portion 35	Fastening part 36	Second metal piece 4
				Base 41	th extension 42	Second extension 43	Third extension 44
Conduction part 45	Engaging part 46	Docking element 200	Gap 7
				Circuit board 300	In the vertical direction Z	Longitudinal direction X	Transverse direction Y

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should now be made to the drawings and this detailed description, taken in conjunction with the accompanying , in which the invention is illustrated.

As shown in fig. 1, the electrical connector 100 of the present invention defines a vertical direction Z, and a longitudinal direction X and a transverse direction Y, respectively, perpendicular to the vertical direction Z.

As shown in fig. 1, the electrical connector 100 of the present invention is used for electrically connecting mating elements 200 to circuit boards 300, and the electrical connector 100 includes a insulating body 1, a plurality of conductive terminals 2 fixed to the insulating body 1, , a th metal piece 3 wrapped on a front surface of the insulating body 1, and a second metal piece 4 wrapped on a rear surface of the insulating body 1.

The insulation body 1 has slots 11 extending along the longitudinal direction X, and the slots 11 are formed by being recessed downwards from the top surface of the insulation body 1 along the vertical direction Z for downward insertion of the docking element 200.

As shown in fig. 2 and 3, the insulative housing 1 has the side wall 12 and the second side wall 13 on both sides of the slot 11, and the side wall 12 and the second side wall 13 extend along the longitudinal direction X and are arranged parallel to each other.

The th side wall 12 and the second side wall 13 are each provided with a plurality of terminal grooves 14, the terminal groove 14 provided on the th side wall 12 penetrates the th side wall 12 in the vertical direction Z, the terminal groove 14 provided on the second side wall 13 penetrates the second side wall 13 in the vertical direction Z, and the terminal groove 14 communicates with the insertion groove 11 in the lateral direction Y (see fig. 5 for assistance).

As shown in fig. 2, the plurality of terminal slots 14 includes -st slots 14A, and -th slots 14A are disposed on the -th side wall 12 and located at the outermost side of the left end of the slot 11.

As shown in fig. 2 and 5, a groove 121 is formed by inwardly recessing from the outer surface of the th sidewall 12, and the th sidewall 12 has a protrusion 122 located below the groove 121 and connected to the groove 121.

A plurality of slots 123 are recessed inwardly from the groove 121 and downwardly penetrate the protrusion 122, and each slot 123 of is correspondingly communicated with the terminal slot 14, so as to conveniently mold the slot 123 on the -th side wall 12.

As shown in fig. 3 and 5, notch 131 is formed by inward recessing from the outer surface of the second sidewall 13, and the second sidewall 13 has protrusion 132 located below the notch 131 and connecting the notch 131.

A plurality of openings 133 are recessed from the recess 131 and downwardly penetrate the protrusion 132, each opening 133 is correspondingly communicated with the second terminal groove 14, and the openings 133 and the grooves 123 have the same structure, so as to facilitate molding the openings 133 on the second side wall 13.

As shown in fig. 2 and 3, a fool-proof portion 15 is protruded in the slot 11 of the insulation body 1, the fool-proof portion 15 connects the th sidewall 12 and the second sidewall 13, and the th sidewall 12 and the second sidewall 13 are not provided with the terminal slot 14 at a position facing the fool-proof portion 15 in the transverse direction Y.

The insulating body 1 has two end walls 16 at two ends of the slot 11, the two end walls 16 connect the th side wall 12 and the second side wall 13, and the two end walls 16 extend along the transverse direction Y and are arranged in parallel with each other.

As shown in fig. 2, a plurality of the conductive terminals 2 are correspondingly fixed to the plurality of terminal slots 14, respectively, the plurality of conductive terminals 2 include the th terminal 2A, and the th terminal 2A is correspondingly fixed to the th slot 14A.

As shown in fig. 2 and 5, each of the conductive terminal 2 has a main body portion , the main body portion 21 is in interference fit with the terminal slot 14, a contact portion is formed by extending upward from the main body portion 21, the contact portion 22 protrudes into the slot 11 for electrical connection with the mating component 200, and a soldering portion is formed by extending downward from the main body portion 21 for soldering the conductive terminal 2 to the circuit board 300.

As shown in fig. 3, 4 and 5, the th metal fitting 3 is wrapped around the th side wall 12, the th metal fitting 3 has a flat-plate-shaped body portion 31, and the body portion 31 is housed in the groove 121, so that the overall volume of the electrical connector 100 can be reduced, which is beneficial to the miniaturization of the electrical connector 100.

the lead connection part 32 is formed by bending and extending downwards from the bottom end of the main body part 31, the lead connection part 32 is on the left side of the main body part 31 in the vertical direction Z, the lead connection part 32 is accommodated in the slot 123 and contacts with the terminal 2A, so as to enhance the grounding function of the terminal 2A, reduce the electromagnetic interference between the conductive terminals 2 and ensure the high-frequency transmission performance of the electrical connector 100.

As shown in fig. 3, 4 and 6, the st protrusion 33 is formed by extending downward and vertically from the bottom end of the main body 31, the right side of the th protrusion 33 is flush with the right side of the main body 31 in the vertical direction Z, the th protrusion 33 and the th guiding and connecting portion 32 are respectively located at the outermost sides of the left and right ends of the th metal part 3, the th protrusion 33 is accommodated in the slot 123 and is not in contact with the conductive terminal 2, and the th protrusion 33 is in interference fit with the bump 122 so as to fix the th metal part 3 to the side wall 12 of the .

A plurality of second connecting portions 34 are formed by bending and extending downward from the bottom end of the main body 31 (in other embodiments, there may be only second connecting portions 34), the second connecting portions 34 are located between the connecting portion 32 and the protruding portion 33, the second connecting portions 34 and the connecting portion 32 have the same structure, the second connecting portions 34 are accommodated in the slots 123 and correspond to the slots, and the conductive terminals 2 located on the side walls 12 contact with each other to form a ground loop, thereby reducing electromagnetic interference between the conductive terminals 2 and ensuring high-frequency transmission performance of the electrical connector 100.

As shown in fig. 6, two adjacent second conduction parts 34 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 that are located on the th side wall 12 and are arranged in series (in other embodiments, three or more adjacent second conduction parts 34 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 that are located on the th side wall 12 and are arranged in series), so that can further reduce the electromagnetic interference between the conductive terminals 2.

As shown in fig. 3 and 6, the th metal piece 3 is provided with the second guiding portion 34 adjacent to the right side of the fool-proof portion 15 (in other embodiments, the th metal piece 3 is provided with the second guiding portion 34 adjacent to the left side of the fool-proof portion 15, or the th metal piece 3 is provided with the second guiding portion 34 adjacent to both the left and right sides of the fool-proof portion 15).

As shown in fig. 3 and 6, a plurality of second protrusions 35 (in other embodiments, there may be only second protrusions 35) are vertically extended downward from the bottom end of the main body 31, the second protrusions 35 are located between the guiding portion 32 and the protrusion 33, the second protrusions 35 are accommodated in the slots 123 and do not contact with the conductive terminal 2, wherein the portion of the second protrusions 35 is in interference fit with the bumps 122 to fix the th metal element 3 to the th sidewall 12.

As shown in fig. 6, two adjacent second protrusions 35 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 arranged in succession on the th side wall 12 (in other embodiments, three or more adjacent second protrusions 35 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 arranged in succession on the th side wall 12).

Wherein two adjacent second protrusions 35 are alternately arranged with an interval from two adjacent second lead portions 34 in the longitudinal direction X.

As shown in fig. 3 and 5, a plurality of engaging portions 36 are formed by bending and extending downward from the top end of the main body 31, the engaging portions 36 contact the top surface of the th side wall 12, and the engaging portions 36 extend into the corresponding terminal grooves 14 on the th side wall 12 to fix the th metal piece 3 to the th side wall 12.

As shown in fig. 2 and 5, the second metal part 4 is formed separately from the metal part 3 (in other embodiments, the metal part 3 is electrically connected to the second metal part 4 through a connector (not shown), and the metal part 3, the connector (not shown), and the second metal part 4 may also be -body-formed).

The second metal part 4 is wrapped on the second side wall 13, the second metal part 4 has a base portion 41 in a flat plate shape , and the base portion 41 is accommodated in the notch 131, so that the overall volume of the electrical connector 100 can be reduced, and the electrical connector 100 is facilitated to be miniaturized.

As shown in fig. 2, 5 and 7, a extending portion 42 is formed by extending vertically downward from the bottom end of the base portion 41, the left side of the extending portion 42 is flush with the left side of the base portion 41 in the vertical direction Z, the extending portion 42 is disposed opposite to the guiding portion 32 and the terminal 2A in the transverse direction Y, the extending portion 42 is accommodated in the opening 133 and does not contact with the conductive terminal 2, and the extending portion 42 is in interference fit with the protrusion 132 to fix the second metal piece 4 to the second side wall 13.

As shown in fig. 2 and 6, a second extending portion 43 is formed by extending vertically downward from the bottom end of the base portion 41, the right side of the second extending portion 43 is flush with the right side of the base portion 41 in the vertical direction Z, the second extending portion 43 and the extending portion 42 have the same structure and are respectively located at the outermost sides of the left and right ends of the second metal component 4, the second extending portion 43 is disposed opposite to the protruding portion 33 in the transverse direction Y, the second extending portion 43 is accommodated in the opening 133 and does not contact with the conductive terminal 2, and the protruding portion 33 is in interference fit with the protrusion 132 to fix the second metal component 4 to the second side wall 13.

As shown in fig. 2 and 6, a plurality of third extending portions 44 are formed by vertically extending downward from the bottom end of the base portion 41 (in other embodiments, there may be only third extending portions 44), the third extending portions 44 are located between the extending portion 42 and the second extending portion 43, the third extending portions 44 are received in the openings 133 and are not in contact with the conductive terminal 2, wherein the third extending portion 44 of the portion is in interference fit with the protruding portion 132 to fix the second metal member 4 to the second side wall 13.

Two adjacent third extending portions 44 are disposed corresponding to the conductive terminals 2 that are located on the second side wall 13 in the longitudinal direction X, wherein the conductive terminals 2 are in the same number and are arranged in series (in other embodiments, three or more adjacent third extending portions 44 are disposed corresponding to the conductive terminals 2 that are located on the second side wall 13 in the same number and are arranged in series).

Wherein the third extending portions 44 are disposed on two opposite sides of the second metal piece 4 adjacent to the fool-proof portion 15.

As shown in fig. 2 and 6, a plurality of conducting portions 45 are formed by bending and extending downward from the bottom end of the base portion 41 (in other embodiments, there may be only conducting portions 45), the conducting portions 45 are located between the th extending portion 42 and the second extending portion 43, the conducting portions 45 are accommodated in the opening 133 and are corresponding to the opening, and the conductive terminals 2 located on the second side wall 13 contact with each other to form a ground loop, so that the electromagnetic interference between the conductive terminals 2 is reduced, and the high-frequency transmission performance of the electrical connector 100 is ensured.

Two adjacent conduction parts 45 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 located on the second side wall 13 and arranged in series (in other embodiments, three or more adjacent conduction parts 45 are disposed in the longitudinal direction X corresponding to the same number of conductive terminals 2 located on the second side wall 13 and arranged in series), so that the electromagnetic interference between the conductive terminals 2 can be further reduced .

Wherein two adjacent ones of the conduction portions 45 are alternately arranged with an interval from two adjacent ones of the third extension portions 44 in the longitudinal direction X.

As shown in fig. 2 and 5, a plurality of engaging portions 46 are formed by bending and extending downward from the top end of the base 41, the engaging portions 46 contact the top surface of the second sidewall 13, and the engaging portions 46 extend into the corresponding terminal grooves 14 on the second sidewall 13 to fix the second metal piece 4 to the second sidewall 13.

As shown in FIG. 1, the docking element 200 may be an electronic card or other types of elements, and the docking element 200 is provided with a notch 7 corresponding to the fool-proof portion 15.

In summary, the electrical connector of the present invention has the following advantages:

(1) the metal piece 3 is wrapped on the side wall 12, the second metal piece 4 is wrapped on the second side wall 13 to shield electromagnetic interference of external environment to the conductive terminal 2, the lead-in portion 32 contacts the terminal 2A to enhance the grounding function of the terminal 2A, reduce the electromagnetic interference between the conductive terminals 2 and ensure the high-frequency transmission performance of the electrical connector 100, the extending portion 42 is not in contact with the conductive terminal 2 and is arranged opposite to the lead-in portion 32, and the extending portion 42 is fixed to the second side wall 13 to fix the second metal piece 4 to the second side wall 13.

(2) The second connecting portions 34 are in contact with the corresponding conductive terminals 2 on the th side wall 12, wherein at least two adjacent second connecting portions 34 are disposed corresponding to the same number of conductive terminals 2 on the th side wall 12 and arranged in series, so as to further reduce electromagnetic interference between the conductive terminals 2, thereby ensuring high frequency transmission performance of the electrical connector 100.

(3) The conduction parts 45 are in contact with the corresponding conductive terminals 2 on the second side wall 13, wherein at least two adjacent conduction parts 45 are arranged corresponding to the conductive terminals 2 which are located on the second side wall 13 and are the same in number and are continuously arranged, so that the electromagnetic interference between the conductive terminals 2 can be further reduced , and the high-frequency transmission performance of the electrical connector 100 is ensured.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present invention.

Claims

An electrical connector of the type , comprising:

an insulative housing having a slot recessed downward from the housing and st and second side walls on opposite sides of the slot, the slot being for insertion of mating components, the second side wall having a protrusion disposed below and connected to the notch, the notch being recessed inward from an outer surface of the second side wall;

a plurality of conductive terminals disposed on the th side wall and the second side wall, each of the conductive terminals having a contact portion protruding into the slot for electrically connecting with the docking element, the plurality of conductive terminals including a th terminal, the th terminal being disposed on the th side wall and located on the outermost side of the end of the slot;

a metal piece wrapping the side wall, the metal piece having a lead, the lead contacting the terminal;

a second metal piece wrapping the second sidewall and contained in the notch, the second metal piece having extending part fixed on the convex part of the second sidewall, the extending part not contacting the conductive terminal and facing the guiding part.
2. The electrical connector of claim 1, wherein said th metal piece is formed separately from said second metal piece.
3. The electrical connector of claim 1, wherein said -th extension is disposed directly opposite said -th terminal.
4. The electrical connector as claimed in claim 1, wherein a groove is formed by inwardly recessing the outer surface of the th sidewall, the th metal element is received in the groove, the th sidewall has a protrusion located below the groove and connected to the groove, a groove is inwardly recessing from the groove and downwardly penetrating the protrusion, and the th conductive portion is received in the groove.
5. The electrical connector as claimed in claim 4, wherein the -th metal part has a main body , the main body is received in the groove, the -th contact portion is formed by bending and extending downward from the bottom end of the main body, and the side of the -th contact portion is flush with the side of the main body.
6. The electrical connector as claimed in claim 1, wherein the th metal element has th protrusions, the th protrusions are not in contact with the conductive terminals and are located at the outermost sides of the th metal element opposite to the th conductive parts respectively.
7. The electrical connector of claim 6, wherein said th metal piece has at least second protrusions, each said second protrusion being free from contact with said conductive terminal and being located between said guide and said th protrusion.
8. The electrical connector as claimed in claim 6, wherein said metal piece has at least second conductive portions, each of said second conductive portions contacts its corresponding conductive terminal on said side wall, and said second conductive portions are located between second conductive portions and protrusions.
9. The electrical connector of claim 1, wherein said metal piece has a plurality of second protrusions, said second protrusions are not in contact with said conductive terminals, and at least two adjacent second protrusions are disposed corresponding to the same number of conductive terminals disposed on the side wall and arranged in series.
10. The electrical connector as claimed in claim 1, wherein the metal piece has a plurality of second conductive portions, each of the second conductive portions contacts with its corresponding conductive terminal on the side wall, and at least two adjacent second conductive portions are disposed corresponding to the same number of conductive terminals on the side wall.
11. The electrical connector as claimed in claim 1, wherein the -th metal piece has at least second conductive portions, each of the second conductive portions is in contact with the corresponding conductive terminal on the -th side wall, the insulative housing has fool-proof portions in the slots, and at least sides adjacent to the fool-proof portions are provided with the second conductive portions.
12. The electrical connector of claim 1, wherein said second metal piece has a base portion , said base portion is received in said recess, said extending portion is formed to extend vertically downward from a bottom end of said base portion, and a side of said extending portion is flush with a side of said base portion.
13. The electrical connector as claimed in claim 1, wherein the second metal member has second extensions, the second extensions are not in contact with the conductive terminal and are located at the outermost sides of the two opposite ends of the second metal member respectively with the extensions.
14. The electrical connector of claim 13, wherein said second metal member has at least vias, each of said vias contacting a corresponding one of said conductive terminals on said second sidewall, said vias being located between said extension and said second extension.
15. The electrical connector of claim 1, wherein: the second metal piece is provided with a plurality of third extending parts, the third extending parts are not contacted with the conductive terminals, and at least two adjacent third extending parts are arranged corresponding to the conductive terminals which are positioned on the second side wall and are the same in number and continuously arranged.
16. The electrical connector as claimed in claim 1, wherein the second metal member has a plurality of third extending portions, the third extending portions are not in contact with the conductive terminals, the insulative housing has fool-proof portions disposed in the slots, and the third extending portions are disposed adjacent to opposite sides of the fool-proof portions.
17. The electrical connector as claimed in claim 1, wherein the second metal member has a plurality of vias, each of the vias is in contact with the corresponding conductive terminal on the second sidewall, and at least two adjacent vias are disposed corresponding to the same number of conductive terminals on the second sidewall and arranged in series.
18, an electrical connector, comprising:

an insulation body having a slot formed by recessing downward from the insulation body and 0 side wall and second side wall located at two opposite sides of the slot, wherein the slot is used for inserting a butt element, a groove is formed by recessing inward from the outer surface of the side wall, the side wall has an protruding block located below the groove and connected with the groove, and a groove is recessed inward from the groove and penetrates downward through the protruding block;

a plurality of conductive terminals disposed on the th side wall and the second side wall, each of the conductive terminals having a contact portion protruding into the slot for electrically connecting with the docking element, the plurality of conductive terminals including a th terminal, the th terminal being disposed on the th side wall and located on the outermost side of the end of the slot;

a metal element wrapping the side wall and being received in the groove, wherein the metal element has a conductive part, and the conductive part is received in the groove and contacts the terminal;

a second metal piece wrapping the second sidewall, the second metal piece having extending part fixed on the second sidewall, the extending part not contacting the conductive terminal and facing the guiding part.