US20160020537A1

US20160020537A1 - Shielding connector

Info

Publication number: US20160020537A1
Application number: US14/643,309
Authority: US
Inventors: Ted Ju; Zhi Lin Chen
Original assignee: Lotes Co Ltd
Current assignee: Lotes Co Ltd
Priority date: 2014-07-15
Filing date: 2015-03-10
Publication date: 2016-01-21
Also published as: CN204216285U; US10439308B2; US10411375B2; CN104466592B; US10468796B2; US9231356B1; US20160020560A1; US9705217B2; US10008793B2; US20160020568A1; CN204243350U; CN204391417U; US20160020572A1; US20160020569A1; US20170346206A1; CN104466592A; US20170302013A1; CN204216267U; US20170302014A1; US20170324175A1

Abstract

A shielding connector includes an electrical connector body and a shielding casing. The electrical connector body includes a main body for being mounted onto a circuit board, and a mating portion extending from the main body and used for mating with a mating connector. The shielding casing wraps the periphery of the main body, and has a mounting portion fixed onto the circuit board. The mounting portion includes a first soldering portion for being fixed to a solder pad on a surface of the circuit board in a surface mounting manner, and a second soldering portion. The second soldering portion has an insertion portion for being soldered into a soldering hole on the circuit board, and a contact portion for being soldered to a solder plate surrounding the soldering hole on the surface of the circuit board. The contact portion and the first soldering portion are connected.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of, pursuant to 35 U.S.C. §119(e), U.S. provisional patent application Ser. No. 62/024,728, filed Jul. 15, 2014, entitled “ELECTRICAL CONNECTOR,” by Ted Ju, which is incorporated herein in its entirety by reference.
Some references, if any, which may include patents, patent applications and various publications, may be cited and discussed in the description of this invention. The citation and/or discussion of such references, if any, is provided merely to clarify the description of the present invention and is not an admission that any such reference is “prior art” to the invention described herein. All references listed, cited and/or discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference.

FIELD OF THE INVENTION

The present invention relates to an electrical connector, and more particularly to a shielding connector that can effectively improve the shielding effect.

BACKGROUND OF THE INVENTION

An electrical connector in the related art generally includes an insulating body, conducting terminals disposed in the insulating body, and a shielding casing wrapping the insulating body. In order to conduct an electromagnetic interference signal of a conducting terminal to a grounding path to shield electromagnetic interference, the shielding casing is generally provided with one or more soldering pins soldered to a solder pad of a circuit board. The soldering pins of a DIP type are generally soldered alternately into through-holes of the circuit board in a through hole technology and conducted to the solder pad; or soldering pins of a surface mounting technology (SMT) type bend on the shielding casing, and are soldered to the solder pad of the circuit board in a surface mounting manner; or soldering pins of both the DIP type and the SMT type are used. In the foregoing structure, multiple soldering pins of the DIP type are spaced from each other, multiple soldering pins of the SMT type are also spaced by a distance, and the soldering pins of the DIP type and the soldering pins of the SMT type are also disposed independently from each other.
However, when the electrical connector of this structure is soldered to the circuit board, since the soldering pins are spaced from each other or spaced by a distance or are independent from each other, multiple gaps exist at a position where the shielding casing and the circuit board are connected, causing electromagnetic interference signals to leak from these gaps, so that the shielding effect of the shielding casing deteriorates.
Therefore, a heretofore unaddressed need exists in the art to address the aforementioned deficiencies and inadequacies.

SUMMARY OF THE INVENTION

In one aspect, the present invention is directed to a shielding connector that can effectively improve the shielding effect.
In one embodiment, a shielding connector includes an electrical connector body and a shielding casing. The electrical connector body includes a main body used for being mounted onto a circuit board, and a mating portion extending from the main body and used for mating with a mating connector. The shielding casing wraps the periphery of the main body, and has a mounting portion fixed onto the circuit board. The mounting portion includes a first soldering portion and a second soldering portion. The first soldering portion is used for being fixed to a solder pad on a surface of the circuit board in a surface mounting manner. The second soldering portion has an insertion portion used for being soldered and fixed into a soldering hole provided on the circuit board, and a contact portion used for being soldered and fixed to a solder plate surrounding the soldering hole on the surface of the circuit board. The contact portion and the first soldering portion are connected.
In one embodiment, the mounting portion is disposed at a plate edge of the shielding casing.
In one embodiment, the shielding casing includes at least one first side wall extending toward the circuit board along a side wall of the main body. The mounting portion is disposed at a plate edge of the first side wall close to the circuit board. Multiple first soldering portions are disposed at the plate edge of the first side wall. One second soldering portion is disposed at each of two opposite ends of each of the first soldering portions.
In one embodiment, the shielding casing further includes at least one second side wall extending toward the circuit board. The second side wall and the first side wall are adjacent and jointly wrap the side wall of the main body, and a third soldering portion used for being fixed onto the surface of the circuit board in the surface mounting manner is formed at a plate edge of the second side wall close to the circuit board.
In one embodiment, the first side wall extends along the side wall of the main body to encircle the entire main body, and the mounting portion encircles the periphery of the main body.
In one embodiment, a reserved portion is depressed from the mounting portion toward a direction away from the circuit board, and a gap exists between the reserved portion and the circuit board to reserve a space for a conducting circuit on the circuit board.
In one embodiment, the mounting portion further includes a fourth soldering portion used for being fixed onto the surface of the circuit board in the surface mounting manner, and the fourth soldering portion is connected to neither the first soldering portion nor the second soldering portion.
In one embodiment, one second soldering portion is disposed at each of two opposite ends of the first soldering portion, and each of the second soldering portions has one contact portion connected to the first soldering portion.
In one embodiment, the second soldering portion includes two contact portions separately located at two opposite sides of the insertion portion, and each of the contact portions is connected to one first soldering portion.
In one embodiment, the mating portion is sheathed in a metal casing. A mating cavity for the mating connector to be inserted therein is formed in the mating portion. A shielding sheet is disposed on an outer side surface of the mating portion. An elastic sheet bends from one end of the shielding sheet and enters the mating cavity to contact a metal housing of the mating connector. An arm portion bends from another end of the shielding sheet toward the metal casing and elastically urges the metal casing. An opening is provided at a middle portion of the elastic sheet, and the opening widens gradually from a root portion of the elastic sheet toward a free end of the elastic sheet.
The electrical connector body includes an insulating seat and multiple conducting terminals disposed in the insulating seat. Each conducting terminal has a conducting portion bending from one end thereof and used for electrically connecting the mating connector. Multiple reserved slots are provided through a surface of the insulating seat and correspond to free ends of the conducting portions. A through-hole is provided at a position of the shielding sheet corresponding to the reserved slots. An outer side of the shielding sheet is covered with an insulating sheet, and the insulating sheet correspondingly covers the through-hole of the shielding sheet.
Compared with the related art, in certain embodiments of the present invention, a first soldering portion of a surface mounting type and a second soldering portion of a DIP type are disposed on a mounting portion of a shielding casing and connected, and the two are coherently soldered to a circuit board, and therefore a gap between the mounting portion of the shielding casing and the circuit board can be effectively reduced, so as to reduce the risk of leaking electromagnetic interference signals, and improve the shielding effect.
These and other aspects of the present invention will become apparent from the following description of the preferred embodiment taken in conjunction with the following drawings, although variations and modifications therein may be effected without departing from the spirit and scope of the novel concepts of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate one or more embodiments of the invention and together with the written description, serve to explain the principles of the invention. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of an embodiment.

FIG. 1 is a schematic three-dimensional view of a first embodiment according to the present invention.

FIG. 2 is a schematic exploded view of FIG. 1.

FIG. 3 is a schematic view of elements in FIG. 2 viewed from another angle and a partial enlarged view thereof.

FIG. 4 is a schematic further exploded view of the elements in FIG. 2 and a partial enlarged view thereof.

FIG. 5 is a sectional view of FIG. 1.

FIG. 6 is a schematic view of a circuit board.

FIG. 7 is a schematic three-dimensional exploded view of a second embodiment according to the present invention and a partial enlarged view thereof.

DETAILED DESCRIPTION OF THE INVENTION

The present invention is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Various embodiments of the invention are now described in detail. Referring to the drawings, like numbers indicate like components throughout the views. As used in the description herein and throughout the claims that follow, the meaning of “a”, “an”, and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein and throughout the claims that follow, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise. Moreover, titles or subtitles may be used in the specification for the convenience of a reader, which shall have no influence on the scope of the present invention.
It will be understood that when an element is referred to as being “on” another element, it can be directly on the other element or intervening elements may be present therebetween. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
Furthermore, relative terms, such as “upper” and “lower,” “top” and “bottom,” “front” and “rear,” “left” and “right,” may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in one of the figures is turned over, elements described as being on the “lower” side of other elements would then be oriented on “upper” sides of the other elements. The exemplary term “lower”, can therefore, encompasses both an orientation of “lower” and “upper,” depending of the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as “below” or “beneath” other elements would then be oriented “above” the other elements. The exemplary terms “below” or “beneath” can, therefore, encompass both an orientation of above and below.
As used herein, “around”, “about” or “approximately” shall generally mean within 20 percent, preferably within 10 percent, and more preferably within 5 percent of a given value or range. Numerical quantities given herein are approximate, meaning that the term “around”, “about” or “approximately” can be inferred if not expressly stated.
As used herein, the terms “comprising”, “including”, “carrying”, “having”, “containing”, “involving”, and the like are to be understood to be open-ended, i.e., to mean including but not limited to. The description will be made as to the embodiments of the present invention in conjunction with the accompanying drawings in FIGS. 1-7. In accordance with the purposes of this invention, as embodied and broadly described herein, this invention, in one aspect, relates to a shielding connector.
As shown in FIG. 1 and FIG. 2, a shielding connector of a first embodiment of the present invention includes an electrical connector body 1, a shielding casing 2, and a metal casing 3. The electrical connector body 1 includes a main body 10 used for being mounted onto a circuit board 4, and a mating portion 11 extending from the main body 10 and used for mating with a mating connector (not shown). The periphery of the main body 10 is wrapped with the shielding casing 2, and the periphery of the mating portion 11 is wrapped with the metal casing 3.
Referring to FIG. 2 and FIG. 6, the circuit board 4 includes multiple solder pads 40 in a strip shape, multiple soldering holes 41 located on extension lines of the solder pads 40, solder plates 42 each surrounding one of the soldering holes 41, and two rows of solder pads 43 (including signal solder pads and grounding solder pads) disposed at the center of the surface of the circuit board 4. A copper foil is disposed in each soldering hole 41. Each of the solder plate 42 is in communication with the corresponding solder pad 40. Both the solder plate 42 and the solder pad 40 are grounded. The two rows of solder pads 43 are used for electrically connecting the electrical connector body 1.
As shown in FIG. 2 and FIG. 4, the electrical connector body 1 includes an insulating seat 5 and multiple conducting terminals 6 disposed in the insulating seat 5.
Referring to FIG. 4 and FIG. 5, the multiple conducting terminals 6 are disposed in an upper row and a lower row, and fixed to an insulating member 60 in an insert molding manner to form an upper terminal group and a lower terminal group. Each conducting terminal 6 has a conducting portion 61 bending from a front end thereof, and a soldering pin 62 formed at a rear end thereof and connected to one of the solder pads 43 on the surface of the circuit board 4. More specifically, the front ends of the upper row of conducting terminals 6 bend downward to form the conducting portions 61, and free ends of the upper row of conducting terminals 6 are warped upward. The front ends of the lower row of conducting terminals 6 bend upward to form the conducting portions 61, and free ends of the lower row of conducting terminals 6 are extended downward. After being snap-fit together using positioning structures disposed on respective insulating members 60, the upper terminal group and the lower terminal group are mounted into the insulating seat 5.
As shown in FIG. 4 and FIG. 5, the insulating seat 5 includes a base 50 and an accommodating portion 51 extending forward from the base 50 and perpendicular to the base 50. The base 50 is roughly rectangular, and includes a front end surface, an upper side wall, a lower side wall, a left side wall and a right side wall. The accommodating portion 51 is in a cylinder shape, and is formed with a mating cavity 52 for the mating connector to be inserted therein. To further shield an interference signal at the mating portion 11, a groove 53 is depressed from each of an upper surface and a lower surface of the accommodating portion 51, and a shielding sheet 7 made of metal is mounted in the groove 53. Multiple elastic sheets 70 bend from a front end of the shielding sheet 7, and multiple through-holes are provided at corresponding positions on the accommodating portion 51 and are provided for the elastic sheets 70 to enter the mating cavity 52 to contact a metal housing (not shown) of the mating connector. An opening 71 is provided at a middle portion of each of the elastic sheets 70, so as to enhance elasticity of the elastic sheet 70. The opening 71 widens gradually from a root portion of the elastic sheet 70 toward a free end of the elastic sheet 70, so as to disperse a stress existed when the elastic sheet 70 is pressed. An arm portion 72 bends from a rear end of the shielding sheet 7 toward the metal casing 3, and elastically urges the metal casing 3, so that the shielding sheet 7 and the metal casing 3 form a conducted grounding line. Multiple reserved slots 54 are further depressed from each groove 53 toward the mating cavity 52. The reserved slot 54 runs through a surface of the accommodating portion 51, is in communication with the mating cavity 52, and is used for the free ends of the corresponding conducting portion 61 to correspondingly enters when the conducting portion 61 contacts the mating connector, so as to ensure that the conducting portion 61 can elastically move freely.
To reserve space for the conducting portion 61, and prevent the shielding sheet 7 and the conducting portion 61 from being short-circuited, a through-hole 73 is provided at the center of the shielding sheet 7 corresponding to the reserved slot 54. The outer side of the shielding sheet 7 is covered with an insulating sheet 8. The insulating sheet 8 correspondingly covers the through-hole 73 of the shielding sheet 7, and is used for isolating the conducting portion 61, so as to prevent the conducting portion 61 and the metal casing 3 from being short-circuited.
As shown in FIG. 2 and FIG. 4, the metal casing 3 is sleeved over the accommodating portion 51, and the metal casing 3 is made by punching a metal plate material. The metal casing 3 is in a cylinder shape corresponding to the accommodating portion 51. The metal casing 3 includes two opposite arc-shaped walls 31, two opposite plate walls 32 connected to the two arc-shaped walls 31, and a fixing sheet 33 bends and extends from a rear end of the plate wall 32. The plate wall 32 elastically urges the arm portion 72 of the shielding sheet 7, and the fixing sheet 33 is fixed to the shielding casing 2 in a spot welding manner, so as to ensure a good connection between the metal casing 3 and the shielding casing 2 while shielding the mating portion 11 of the electrical connector body 1. In other embodiments, the metal casing 3 and the shielding casing 2 may be integrally formed. In one embodiment, the accommodating portion 51 is not required to be sheathed with the metal casing 3. For example, the accommodating portion 51 may be covered by the metal housing of the mating connector when the mating connector is inserted into the accommodating portion 51. The present invention is not limited thereto.
Referring to FIG. 1, FIG. 2 and FIG. 4, the shielding casing 2 is formed by punching a metal plate material, and wraps the periphery of the main body 10. More specifically, the shielding casing 2 is sleeved over the base 50 of the insulating seat 5, and includes a front wall 20 wrapping a front end surface of the base 50, and two first side walls 21 extending along an upper side wall and a lower side wall of the base 50 toward the circuit board 4, and two second side walls 22 extending along a left side wall and a right side wall of the base 50 toward the circuit board 4. The first side walls 21 and the second side walls 22 are adjacent and jointly wrap four side walls of the base 50, so as to shield the entire main body 10.
As shown in FIG. 2 and FIG. 3, a plate edge of the first side wall 21 close to the circuit board 4 is formed with a mounting portion 23 for being fixed onto the circuit board 4. The mounting portion 23 includes a first soldering portion 231 and a second soldering portion 232. The first soldering portion 231 is fixed to the solder pad 40 on the surface of the circuit board 4 in a surface mounting manner. The second soldering portion 232 has an insertion portion 2320 used for being soldered and fixed into the soldering hole 41 provided on the circuit board 4, and a contact portion 2321 used for being soldered and fixed to the solder plate 42 surrounding the soldering hole 41 on the surface of the circuit board 4. The contact portion 2321 and the first soldering portion 231 are connected. In this embodiment, plate edge of each first side wall 21 has two first soldering portions 231 not adjacent to each other. Each of the two opposite ends of each first soldering portion 231 is disposed with one second soldering portion 232. The mounting portion 23 further has a reserved portion 233 depressed toward a direction away from the circuit board 4. A gap exists between the reserved portion 233 and the circuit board 4 to reserve a space for conducting circuit (not shown) on the circuit board 4. The mounting portion 23 further includes a fourth soldering portion 234 used for being fixed to the surface of the circuit board 4 in the surface mounting manner. The fourth soldering portion 234 does not connect the first soldering portion 231 or the second soldering portion 232.
A plate edge of the second side wall 22 close to the circuit board 4 has a third soldering portion 220, for being fixed to the surface of the circuit board 4 in the surface mounting manner. Therefore, the rear end of the shielding casing 2 can wrap the main body 10 hermetically as much as possible, and the gap at the position where the second side wall 22 and the circuit board 4 are soldered is reduced, so as to reduce the risk of leaking electromagnetic interference signals, and improve the shielding effect.
As shown in FIG. 7, as a second embodiment of the present invention, it is different from the first embodiment in that: the shielding casing 2 may be formed in a manner of metal die-casting molding or powder metallurgy molding. Therefore, the first side wall 21 of the shielding casing 2 extends to encircle the entire main body 10 along the side wall of the main body 10, and the mounting portion 23 encircles the periphery of the main body 10. The mounting portion 23 includes multiple first soldering portions 231 and multiple second soldering portions 232, and the first soldering portions 231 and the second soldering portions 232 are sequentially connected to encircle the periphery of soldering pins 62 of multiple conducting terminals 6. Some second soldering portions 232 include two contact portions 2321 separately located at two opposite sides of the insertion portion 2320, and each of the contact portions 2321 is separately connected to one of the first soldering portions 231. Such a structure can make the shielding casing 2 wrap the main body 10 seamlessly, and the mounting portion 23 is in a consecutive ring shape as much as possible, so that the gap between the mounting portion 23 and the surface of the circuit board 4 can be further reduced, so as to strengthen the shielding effect.
Certain embodiments of the present invention, among other things, have the following beneficial advantages.
1. A first soldering portion 231 of a surface mounting type and a second soldering portion 232 of a DIP type are disposed on a mounting portion 23 of a shielding casing 2 and connected to each other, and the two are coherently soldered to a surface of a circuit board 4, and therefore a gap between the mounting portion 23 of the shielding casing 2 and the circuit board 4 can be effectively reduced, so as to reduce the risk of leaking electromagnetic interference signals, and improve the shielding effect.
2. The mounting portion 23 is disposed at a plate edge of the shielding casing 2, and therefore it is convenient to form the first soldering portion 231 and the second soldering portion 232 connected to each other, and the shielding casing 2 can be mounted onto the circuit board 4 hermetically as much as possible, so as to reduce the gap at a position where the plate edge of the shielding casing 2 and the circuit board 4 are connected, and improve the shielding effect.
3. A second side wall 22 and a first side wall 21 are adjacent and jointly wrap a side wall of a main body 10, and therefore the rear end of the shielding casing 2 can wrap the main body 10 hermetically as much as possible, so as to prevent interference signals in the main body 10 from leaking A third soldering portion 220 is disposed at a plate edge of the second side wall 22 and used for being fixed to the surface of the circuit board 4 in a surface mounting manner, and therefore the gap between the second side wall 22 and the circuit board 4 can be reduced, so as to reduce the risk of leaking electromagnetic interference signals, and improve the shielding effect.
4. The first side wall 21 extends to encircle the entire main body 10 along the side wall of the base 50, and the mounting portion 23 encircles the periphery of the main body 10, and therefore the plate edge of the entire shielding casing 2 is fixed to the circuit board 4 by using the first soldering portion 231 and the second soldering portion 232 which are sequentially connected. In such a structure, the shielding casing 2 can wrap the main body 10 seamlessly, the mounting portion 23 is in a consecutive ring shape as much as possible, and the gap between the mounting portion 23 and the surface of the circuit board 4 can be further reduced, so as to strengthen the shielding effect.
5. A shielding sheet 7 is added onto an accommodating portion 51, an elastic sheet 70 is disposed at one end of the shielding sheet 7 to enter a mating cavity 52 to contact a metal housing of a mating connector, and an arm portion 72 extends from another end and urges the shielding casing 2. Therefore the shielding effect at a mating portion 11 can be enhanced, and a complete grounding path is formed between the shielding connector and the mating connector, so as to strengthen the shielding effect of the shielding connector and the mating connector.
6. An opening 71 is provided at a middle portion of the elastic sheet 70 at the front end of the shielding sheet 7, and elasticity of the elastic sheet 70 can be enhanced, so as to ensure stable contact between the elastic sheet 70 and the metal housing of the mating connector.
7. The reserved slot 54 runs through a surface of the accommodating portion 51, is in communication with the mating cavity 52, and can be reserved for a free end of the conducting portion 61 to enter correspondingly when the conducting portion 61 contacts the mating connector, so as to ensure that the conducting portion 61 can elastically move freely, prevent fatigue of a conducting terminal 6, and ensure good contact.
8. A through-hole 73 provided at a position at the center of the shielding sheet 7 corresponding to the reserved slot 54 can reserve the conducting portion 61 of the conducting terminal 6, so as to prevent the shielding sheet 7 and the conducting portion 61 of the conducting terminal 6 from being short-circuited.
9. The insulating sheet 8 correspondingly covers the through-hole 73 of the shielding sheet 7, and is used for isolating the conducting portion 61 of the conducting terminal 6, so as to prevent the conducting portion 61 and the metal casing 3 from being short-circuited.
The foregoing description of the exemplary embodiments of the invention has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.
The embodiments are chosen and described in order to explain the principles of the invention and their practical application so as to activate others skilled in the art to utilize the invention and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present invention pertains without departing from its spirit and scope. Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing description and the exemplary embodiments described therein.

Claims

What is claimed is:

1. A shielding connector, comprising:

an electrical connector body, comprising a main body for being mounted onto a circuit board, and a mating portion extending from the main body for mating with a mating connector; and

a shielding casing, wrapping a periphery of the main body, and having a mounting portion for being fixed onto the circuit board, the mounting portion comprising:

a first soldering portion, for being fixed to a solder pad on a surface of the circuit board in a surface mounting manner; and

a second soldering portion, having an insertion portion for being soldered and fixed into a soldering hole provided on the circuit board, and a contact portion for being soldered and fixed to a solder plate surrounding the soldering hole on the surface of the circuit board, the contact portion and the first soldering portion being connected.

2. The shielding connector of claim 1, wherein the mounting portion is disposed at a plate edge of the shielding casing.

3. The shielding connector of claim 1, wherein the shielding casing comprises at least one first side wall extending toward the circuit board along a side wall of the main body, and the mounting portion is disposed at a plate edge of the first side wall that is close to the circuit board.

4. The shielding connector of claim 3, wherein a plurality of first soldering portions are disposed at the plate edge of the first side wall, and one second soldering portion is disposed at each of two opposite ends of each of the first soldering portions.

5. The shielding connector of claim 3, wherein the shielding casing further comprises at least one second side wall extending toward the circuit board, the second side wall and the first side wall are adjacent and jointly wrap the side wall of the main body, and a third soldering portion used for being fixed onto the surface of the circuit board in the surface mounting manner is formed at a plate edge of the second side wall close to the circuit board.

6. The shielding connector of claim 3, wherein the first side wall extends along the side wall of the main body to encircle the entire main body, and the mounting portion encircles the periphery of the main body.

7. The shielding connector of claim 1, wherein a reserved portion is depressed from the mounting portion toward a direction away from the circuit board, and a gap exists between the reserved portion and the circuit board to reserve a space for a conducting circuit on the circuit board.

8. The shielding connector of claim 1, wherein the mounting portion further comprises a fourth soldering portion for being fixed onto the surface of the circuit board in the surface mounting manner, and the fourth soldering portion is connected to neither the first soldering portion nor the second soldering portion.

9. The shielding connector of claim 1, wherein one second soldering portion is disposed at each of two opposite ends of the first soldering portion, and each of the second soldering portions has one contact portion connected to the first soldering portion.

10. The shielding connector of claim 1, wherein the second soldering portion comprises two contact portions located respectively at two opposite sides of the insertion portion, and each of the contact portions is connected to one first soldering portion.

11. The shielding connector of claim 1, further comprising:

a metal casing sheathed on the mating portion; and

a shielding sheet disposed on an outer side surface of the mating portion, comprising:

an elastic sheet bending from one end of the shielding sheet and entering a mating cavity to contact a metal housing of the mating connector, wherein the mating cavity is formed in the mating portion for the mating connector to be inserted therein; and

an arm portion bending from another end of the shielding sheet toward the metal casing and elastically urging the metal casing.

12. The shielding connector of claim 11, wherein the elastic sheet comprises an opening at a middle portion thereof, and the opening widens gradually from a root portion of the elastic sheet toward a free end of the elastic sheet.

13. The shielding connector of claim 11, wherein the electrical connector body comprises:

an insulating seat, having a plurality of reserved slots running through a surface thereof; and

a plurality of conducting terminals disposed in the insulating seat, each having a conducting portion bending from one end thereof for electrically connecting the mating connector,

wherein the reserved slots correspond to free ends of the conducting portions, and the shielding sheet comprises a through-hole corresponding to the reserved slots.

14. The shielding connector of claim 13, further comprising an insulating sheet covering an outer side of the shielding sheet, the insulating sheet correspondingly covering the through-hole of the shielding sheet.