CN107658593B

CN107658593B - Electrical connector

Info

Publication number: CN107658593B
Application number: CN201710706758.0A
Authority: CN
Inventors: 伍克化; 曾波
Original assignee: Lotes Guangzhou Co Ltd
Current assignee: Lotes Guangzhou Co Ltd
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2019-12-27
Anticipated expiration: 2037-08-17
Also published as: CN107658593A

Abstract

An electrical connector, comprising: the insulating body comprises a horizontal part extending forwards and a vertical part positioned below the horizontal part; a plurality of terminals including a plurality of signal terminals and at least one ground terminal, each of the terminals having a horizontal arm and a vertical arm bent and extended downward from the horizontal arm, the horizontal arm being fixed to the horizontal portion, and the vertical arm being fixed to the vertical portion; the metal shell coats the horizontal part and penetrates through the surface of the horizontal part to form at least one through hole; the grounding piece is arranged on the outer surface of the metal and provided with at least one elastic arm, and the elastic arm penetrates through the through hole to enter the metal shell and abuts against the horizontal arm of the grounding terminal; and the shielding shell coats the vertical part and is provided with a butting arm which is butted with the grounding piece.

Description

Electrical connector

Technical Field

The present invention relates to an electrical connector, and more particularly, to a raised electrical connector capable of reducing electromagnetic interference.

Background

In the conventional electrical connector for transmitting high frequency signals, electromagnetic interference is generally generated between terminals, and how to solve and reduce the electromagnetic interference is an important issue of research in the industry. For example, in a newly emerging USB TYPEC connector, comprising an insulating body and two rows of terminals arranged within the insulating body, each row of terminals comprises in sequence: the ground terminal, a pair of differential signal terminals are used for transmitting high-frequency signals, the power supply terminal, the reserved terminal, a pair of signal terminals, the reserved terminal, the power supply terminal, a pair of differential signal terminals are used for transmitting high-frequency signals, and the ground terminal. Each terminal comprises a horizontal arm fixed in the insulating body and a vertical arm bent and extended out of the insulating body from the horizontal arm, and the tail end of the vertical arm is used for being welded to a circuit board.

Because the horizontal arms of the differential signal terminals for transmitting high-frequency signals are arranged in the upper row of terminals and the lower row of terminals of the insulating body of the connector, electromagnetic interference is easy to generate when the connector is used; in the current commonly used high-profile electrical connectors, the vertical arm is also lengthened to ensure a stable soldering of the terminals to the circuit board and balance the overall electrical connector assembly mechanism. However, when the length of the vertical arm is increased, when a high-frequency signal passes through the vertical arm, distortion is more likely to be leaked, and even the electric connector loses the transmission capability of the high-frequency signal.

Therefore, there is a need for an improved electrical connector that overcomes the above problems.

Disclosure of Invention

In view of the problems encountered in the prior art, an object of the present invention is to provide an electrical connector that reduces electromagnetic interference by forming a complete ground loop through conduction among a metal shell, a shielding shell and a ground strip.

In order to achieve the purpose, the invention adopts the following technical means: an electrical connector, comprising: the insulating body comprises a horizontal part extending forwards and a vertical part positioned below the horizontal part; a plurality of terminals including a plurality of signal terminals and at least one ground terminal, each of the terminals having a horizontal arm and a vertical arm bent and extended downward from the horizontal arm, the horizontal arm being fixed to the horizontal portion, and the vertical arm being fixed to the vertical portion; the metal shell covers the horizontal part, and at least one through hole is formed in the surface of the metal shell; the grounding piece is arranged on the outer surface of the metal and provided with at least one elastic arm, and the elastic arm penetrates through the through hole to enter the metal shell and abuts against the horizontal arm of the grounding terminal; the shielding shell covers the vertical part and is provided with an abutting arm which abuts against the grounding sheet;

furthermore, the grounding plate is provided with at least one buckling arm, the horizontal part is provided with a groove corresponding to the through hole, the buckling arm penetrates through the through hole and enters the groove, two opposite sides of the buckling arm respectively protrude to form a convex part, and the convex part is in interference fit with the inner wall of the groove, so that the grounding plate is attached and fixed on the surface of the metal shell;

furthermore, the grounding sheet is formed by stamping a metal plate, and the plate surface of the buckling arm is perpendicular to the plate edge of the elastic arm;

furthermore, the grounding plate penetrates through the surface of the grounding plate to be provided with an opening, the two opposite side edges of the opening are respectively bent and extend downwards to form the buckling and holding arm, a cross beam is connected with the other two opposite side edges of the opening, and the two buckling and holding arms are positioned at the two sides of the cross beam;

furthermore, the fixing part is formed by extending forwards and downwards from the rear edge of the through hole in a downward inclined mode, is arranged in the through hole, is positioned between the elastic arm and the buckling arm and is abutted against the horizontal part;

further, the electric connector comprises two grounding sheets which are respectively attached to the upper surface and the lower surface of the metal shell, and the abutting arms abut against the grounding sheets attached to the lower surface of the metal shell;

furthermore, the abutting arm comprises a connecting part which is horizontally arranged and an abutting part which is formed by bending, inclining and extending downwards and then horizontally and forwards from the connecting part, and the abutting part abuts against the grounding sheet;

further, the connecting part is higher than the lower surface of the metal shell;

further, the shielding shell has two abutting arms, the grounding plate has two elastic arms, and the two abutting arms are located between the two elastic arms;

furthermore, the terminals are symmetrically fixed in the horizontal part in an upper row and a lower row, and the shielding shell is provided with at least one first elastic sheet and at least one second elastic sheet which are respectively abutted against the grounding terminals in the upper row and the grounding terminals in the lower row;

further, the first elastic sheet is connected with the vertical arm of the lower row of the grounding terminals in a backward abutting mode, and the second elastic sheet is connected with the vertical arm of the upper row of the grounding terminals in a forward abutting mode;

furthermore, the shielding shell is provided with a front wall, two side walls formed by extending from two opposite sides of the front wall, and two rear walls formed by extending from edges of the two side walls in opposite directions, the two first elastic sheets are formed by blanking the panel of the front wall, and the lower edge of each rear wall is bent downwards and extends to form one second elastic sheet.

Compared with the prior art, the invention has the following beneficial effects:

the metal casing cladding the horizontal part, the grounding lug covers the metal casing surface, the elastic arm passes the through-hole gets into butt in the metal casing the horizontal arm of ground terminal, the shielding shell cladding vertical arm, butt arm butt the grounding lug so makes the metal casing the grounding lug with the shielding shell in the horizontal arm of terminal with formed complete ground return circuit around the vertical arm, and this ground return circuit passes through ground terminal realizes ground connection, has reduced the electromagnetic interference of electric connector when transmitting high frequency signal, has improved electric connector high frequency signal transmission's fidelity rate has adapted to today the demand of electric connector high frequency signal transmission.

[ description of the drawings ]

FIG. 1 is a partially exploded perspective view of an electrical connector assembly of the present invention with another electrical connector;

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

fig. 3 is a partially exploded perspective view of the electrical connector of the present invention;

FIG. 4 is a partially exploded perspective view of an alternative embodiment of the electrical connector of the present invention;

FIG. 5 is a perspective assembly view of the electrical connector of the present invention from the perspective of FIG. 4;

fig. 6 is a perspective view of the electrical connector of the present invention with the metal shell and the dielectric body removed from fig. 5;

FIG. 7 is a corresponding side view of the electrical connector of the present invention as shown in FIG. 6;

FIG. 8 is a perspective assembly view of an electrical connector assembly of the present invention with another electrical connector;

fig. 9 is a cross-sectional view taken along line a-a of fig. 8.

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

[ detailed description ] embodiments

For a better understanding of the objects, structure, features, and functions of the invention, reference should be made to the drawings and detailed description that follow.

As shown in fig. 1, 8 and 9, the electrical connector and another electrical connector of the present invention together form an electrical connector assembly, and both are soldered to the same circuit board 6; for convenience of the following description, the electrical connector of the present invention is defined as the first electrical connector 2, and the other electrical connector is defined as the second electrical connector 3. The electric connector assembly comprises a main body 1, and the first electric connector 2 and the second electric connector 3 are arranged in the main body 1 up and down; a front shield shell 4 connecting the first electrical connector 2 and the second electrical connector 3; and a rear shield case 5 shielding a rear end of the main body 1. In this embodiment, the first electrical connector 2 and the second electrical connector 3 have the same model and both satisfy the transmission specification of USB-TYPE C, but of course, in other embodiments, the transmission TYPEs of the first electrical connector 2 and the second electrical connector 3 may be different according to actual requirements, and are not limited herein.

As shown in fig. 1 and 8, the main body 1 is provided with a first receiving cavity 11 and a second receiving cavity 12, and the first receiving cavity 11 is located above the second receiving cavity 12. The first accommodating cavity 11 accommodates the first electrical connector 2, and the first accommodating cavity 11 is through from front to back. The second accommodating cavity 12 accommodates the second electrical connector 3, and a gap 121 is disposed below the second accommodating cavity 12 for soldering the second electrical connector 3 to the circuit board 6.

Further, a notch 13 is formed in the front end of the side surface of each of the two opposite sides of the main body 1, the front shielding shell 4 is fixed to the notch 13 in a matched manner, and the rear shielding shell 5 is fastened to the main body 1 from front to back. A plurality of bosses 14 are arranged below the main body 1 and abut against the surface of the circuit board 6, so that the circuit board 6 stably supports the main body 1.

As shown in fig. 1 and 2, the first electrical connector 2 includes an insulative housing 21, a plurality of terminals 22 held in the insulative housing 21, a first shielding plate 26 and a second shielding plate 27 located in the insulative housing 21, a metal shell 23 and a shielding shell 25 covering the insulative housing 21, and two grounding plates 24 respectively covering the upper and lower surfaces of the metal shell 23; the metal shell 23 and the grounding strip 24 are accommodated in the first accommodating cavity 11, and the shielding shell 25 is accommodated at the rear end of the insulating body 1, so that the first electrical connector 2 is fixed in the main body 1.

As shown in fig. 3 and 4, the insulating body 21 includes a horizontal portion 211 extending forward and a vertical portion 212 located below the horizontal portion 211, the upper and lower surfaces of the horizontal portion 211 are respectively recessed to form two grooves 2111, and the vertical portion 212 includes a first fixing block 2121 and a second fixing block 2122 assembled in the front-rear direction.

The plurality of terminals 22 are symmetrically arranged in the horizontal portion 211 in two rows, and each row of the terminals 22 transversely arranged sequentially includes: the first electrical connector 2 comprises a ground terminal 201, a pair of differential signal terminals 202, a power supply terminal (not numbered), a reserved terminal (not numbered), a pair of signal terminals 202, a reserved terminal (not numbered), a power supply terminal (not numbered), a pair of differential signal terminals 202 and the ground terminal 201, so that the first electrical connector 2 meets the transmission specification of USB-TYPE C. Each of the terminals 22 has a horizontal arm 221 and a vertical arm 222 formed by bending and vertically extending the horizontal arm 221 downward, the horizontal arms 221 are arranged in two rows in the horizontal portion 211, the vertical arms 222 are arranged in two rows in the front-rear direction, further, the vertical arm 222 formed by bending and extending the horizontal arm 221 in the upper row is located in the rear row and is fixed to the second fixing block 2122, and the vertical arm 222 formed by bending and extending the horizontal arm 221 in the lower row is located in the front row and is fixed to the first fixing block 2121. A first extension portion 2211 is formed by extending a lateral edge of the horizontal arm 221 of each ground terminal 201, the first extension portion 2211 is exposed at the horizontal portion 211, a second extension portion 2221 is formed by extending a lateral edge of the vertical arm 222 of each ground terminal 201 at each upper row, and the second extension portion 2221 is exposed at the second fixing block 2122.

As shown in fig. 4 and 5, the metal shell 23 covers the horizontal portion 211 to isolate the leakage of the high frequency signal of the horizontal arm 221; furthermore, four through holes 231 are respectively formed in the upper surface and the lower surface of the metal shell 23 corresponding to the four grooves 2111, a fixing portion 232 is formed by extending from the rear edge of each through hole 231 in a forward and downward inclined manner, the four fixing portions 232 are respectively and correspondingly located in the four through holes 231 and simultaneously abut against the horizontal portion 211, so that the metal shell 23 is stably fixed to the insulating body 21.

As shown in fig. 4, 5 and 7, the grounding plate 24 is formed by stamping a metal plate, each grounding plate 24 has an opening 243 formed through the surface thereof, two opposite sides of the opening 243 are respectively bent and extended to form a retaining arm 242, and the retaining arm 242 passes through the through hole 231 and enters the groove 2111, so that the grounding plate 24 can be locked to the insulating body 21; specifically, in the present embodiment, two opposite sides of the latching arm 242 respectively protrude to form a protrusion 2421, and the protrusion 2421 is in pressing interference fit with the inner wall of the groove 2111 to realize the latching of the grounding plate 24 and the insulating body 21; in other embodiments, the locking manner of the retaining arm 242 and the groove 2111 is not limited as long as the two can be stably locked. Further, the plate edge of each grounding plate 24 is bent and extended to form two elastic arms 241, each elastic arm 241 correspondingly passes through one through hole 231 and abuts against one first extending portion 2211, so as to achieve conduction between the grounding plate 24 and the grounding terminal 201. Preferably, the plate surface of the retaining arm 242 is perpendicular to the plate edge of the elastic arm 241, which is beneficial to the overall structural stability of the grounding plate 24 under stress; in the same through hole 231, the fixing portion 232 is located between the elastic arm 241 and the buckling arm 242, so as to increase the stress balance of the whole mechanism. In this embodiment, the grounding plate 24 under the metal shell 23 is provided with a cross beam 244 connecting two opposite sides of the opening 243, and the two retaining arms 242 are respectively located at two opposite sides of the cross beam 244, so as to increase the structural strength of the grounding plate 24. Of course, in other embodiments, the cross beam 244 may be provided on both the upper and lower grounding plates 24, and is not limited thereto.

As shown in fig. 4, 6 and 7, the shielding shell 25 has a front wall 254, two side walls 255 extending from two opposite sides of the front wall 254, and two rear walls 256 extending from edges of the two side walls 255, and the front wall 254, the two side walls 255 and the two rear walls 256 jointly cover the first fixing block 2121 and the second fixing block 2122, so that the shielding shell 25 can shield the electromagnetic interference of the vertical arm 222. Further, two first elastic pieces 252 are formed on the front wall 254 by blanking, a second elastic piece 253 is formed by bending and extending the lower edge of each rear wall 256 downward, the two first elastic pieces 252 are respectively abutted to the vertical arms 222 of the two ground terminals 201 in the lower row backward, and the two second elastic pieces 253 are respectively abutted to the two second extending portions 2221 forward, so that the shielding shell 25 is in contact conduction with each ground terminal 201, and the capability of the shielding shell 25 in isolating the electromagnetic interference transmitted by the high-frequency signals of the vertical arms 222 is improved.

The upper edge of the front wall 254 extends and bends upwards to form two abutting arms 251, which abut against the grounding sheet 24 attached to the lower surface of the metal shell 23 at the same time, so that the shielding shell 25 is communicated with the grounding sheet 24; this arrangement allows the shielding shell 25, the grounding plate 24 and the metal shell 23 to form a complete grounding loop around the horizontal arm 221 and the vertical arm 222, and the grounding loop realizes multi-point grounding through each grounding terminal 201. Further, the two abutting arms 251 are located between the two elastic arms 241 abutting against the grounding plate 24 on the lower surface of the metal shell 23; the abutting arm 251 comprises a connecting part 2511 arranged horizontally and an abutting part 2512 formed by bending, inclining and extending downwards from the connecting part 2511 and then horizontally extending forwards, wherein the abutting part 2512 abuts against the lower surface of the grounding piece 24 positioned below the metal shell 23 upwards; preferably, the connecting portion 2511 is higher than the lower surface of the metal shell 23, so that the upward elastic force of the abutting portion 2512 is increased, the abutting force of the abutting arm 251 against the grounding plate 24 is increased, and the stability of a grounding loop formed by the shielding shell 25, the metal shell 23 and the grounding plate 24 is ensured.

As shown in fig. 2 and 6, the first shielding plate 26 is held in the horizontal portion 211 and located between the two rows of the horizontal arms 221, the second shielding plate 27 is held between the first fixing block 2121 and the second fixing block 2122 and located between the two rows of the vertical arms 222, and the second shielding plate 27 is bent and extended forward to form two contact arms 271, which contact the first shielding plate 26, so as to enhance the shielding and isolating effects of the first shielding plate 26 and the second shielding plate 27.

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

(1) the metal shell 23 covers the horizontal portion 211, the grounding piece 24 covers the surface of the metal shell 23, the elastic arm 241 penetrates through the through hole 231 to enter the metal shell 23 and abut against the horizontal arm 221 of the grounding terminal 201, the shielding shell 25 covers the vertical arm 222, and the abutting arm 251 abuts against the grounding piece 24, so that the metal shell 23, the grounding piece 24 and the shielding shell 25 form a complete grounding loop around the horizontal arm 221 of the terminal 22 and the vertical arm 222, and the grounding loop realizes grounding connection through the grounding terminal 201, thereby reducing electromagnetic interference of the first electrical connector 2 during transmission of high-frequency signals, improving the fidelity of high-frequency signal transmission of the first electrical connector 2, and adapting to the requirement of high-frequency signal transmission of the first electrical connector 2 at present.

(2) Two first elastic sheets 252 are formed on the front wall 254 by blanking, a second elastic sheet 253 is formed by bending and extending the lower edge of each rear wall 256, the two first elastic sheets 252 are respectively and rearwardly abutted against the vertical arms 222 of the two grounding terminals 201 in the lower row, and the two second elastic sheets 253 are respectively and forwardly abutted against the two second extending portions 2221, so that the shielding shell 25 is in contact conduction with each grounding terminal 201, and the capability of the shielding shell 25 in isolating the electromagnetic interference of the high-frequency signal transmission of the vertical arms 222 is improved.

(3) The abutting arm 251 comprises a connecting part 2511 arranged horizontally and an abutting part 2512 formed by bending, inclining and extending downwards from the connecting part 2511 and then horizontally extending forwards, wherein the abutting part 2512 abuts against the lower surface of the grounding piece 24 upwards; the connecting portion 2511 is higher than the lower surface of the metal shell 23, so that the upward elastic force of the abutting portion 2512 is increased, the abutting force of the abutting arm 251 against the grounding strip 24 is improved, and the stability of a grounding loop formed by the shielding shell 25, the metal shell 23 and the grounding strip 24 is ensured.

(4) The plate surface of the buckling arm 242 is perpendicular to the plate edge of the elastic arm 241, which is beneficial to the overall structural stability of the stress of the grounding plate 24.

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

1. An electrical connector, comprising:

the insulating body comprises a horizontal part extending forwards and a vertical part positioned below the horizontal part;

a plurality of terminals including a plurality of signal terminals and at least one ground terminal, each of the terminals having a horizontal arm and a vertical arm bent and extended downward from the horizontal arm, the horizontal arm being fixed to the horizontal portion, and the vertical arm being fixed to the vertical portion;

the metal shell covers the horizontal part, and at least one through hole is formed in the surface of the metal shell;

the grounding piece is arranged on the outer surface of the metal shell and is provided with at least one elastic arm, and the elastic arm penetrates through the through hole to enter the metal shell and abuts against the horizontal arm of the grounding terminal;

and the shielding shell coats the vertical part and is provided with a butting arm which is butted with the grounding piece.

2. The electrical connector of claim 1, wherein: the grounding piece is provided with at least one buckling arm, the horizontal part corresponds to the through hole and is provided with a groove, the buckling arm penetrates through the through hole and enters the groove, two opposite sides of the buckling arm protrude and extend to form a convex part respectively, and the convex part is in interference fit with the inner wall of the groove, so that the grounding piece is attached and fixed on the surface of the metal shell.

3. The electrical connector of claim 2, wherein: the grounding piece is formed by stamping a metal plate, and the plate surface of the buckling arm is perpendicular to the plate edge of the elastic arm.

4. The electrical connector of claim 2, wherein: the grounding piece penetrates through the surface of the grounding piece and is provided with an opening, the two opposite side edges of the opening are respectively bent and extended to form the buckling arms, a cross beam is connected with the other two opposite side edges of the opening, and the two buckling arms are positioned on the two sides of the cross beam.

5. The electrical connector of claim 2, wherein: the fixing part is formed by extending the rear edge of the through hole in a forward and downward inclined mode, and the fixing part is arranged in the through hole, is positioned between the elastic arm and the buckling arm and is abutted to the horizontal part.

6. The electrical connector of claim 1, wherein: the electric connector comprises two grounding pieces which are respectively attached to the upper surface and the lower surface of the metal shell, and the abutting arms are abutted to the grounding pieces attached to the lower surface of the metal shell.

7. The electrical connector of claim 1, wherein: the butt joint arm includes the connecting portion of horizontal setting, and certainly connecting portion buckle the slope earlier down and extend the butt joint portion that the formation forward is extended to the level again, butt joint portion butt joint the grounding piece.

8. The electrical connector of claim 7, wherein: the connecting part is higher than the lower surface of the metal shell.

9. The electrical connector of claim 1, wherein: the shielding shell has two the butt joint arm, the grounding piece has two the elastic arm, two the butt joint arm is located two between the elastic arm.

10. The electrical connector of claim 1, wherein: the terminals are symmetrically fixed in the horizontal part in an upper row and a lower row, and the shielding shell is provided with at least one first elastic sheet and at least one second elastic sheet which are respectively abutted against the grounding terminals in the upper row and the grounding terminals in the lower row.

11. The electrical connector of claim 10, wherein: the first elastic sheet is connected with the vertical arm of the lower row of the grounding terminals in a backward abutting mode, and the second elastic sheet is connected with the vertical arm of the upper row of the grounding terminals in a forward abutting mode.

12. The electrical connector of claim 10, wherein: the shielding shell is provided with a front wall, two side walls formed by extending from two opposite sides of the front wall and two rear walls formed by extending from edges of the two side walls in opposite directions, the two first elastic pieces are formed by blanking the surface of the front wall, and the lower edge of each rear wall is bent downwards and extends to form one second elastic piece.