CN107681334B

CN107681334B - Electrical connector

Info

Publication number: CN107681334B
Application number: CN201610618201.7A
Authority: CN
Inventors: 钟伟; 朱建矿
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Hongteng Precision Technology Co Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Hongteng Precision Technology Co Ltd
Priority date: 2016-08-01
Filing date: 2016-08-01
Publication date: 2020-10-30
Anticipated expiration: 2036-08-01
Also published as: CN107681334A

Abstract

The invention discloses an electric connector, which comprises a cable, a base, an insulating block positioned in the base and a plurality of conductive terminals fixed on the insulating block, wherein the base comprises a base part and a butt-joint tongue plate extending forwards from the base part, the butt-joint tongue plate is provided with two opposite butt-joint surfaces, each conductive terminal comprises a contact part and a cable part extending backwards from the contact part, the contact parts are exposed on the butt-joint surfaces of the butt-joint tongue plates, the front end of the cable comprises exposed conductors mechanically and electrically connected with the conductive terminals, the rear end of the insulating block is provided with accommodating grooves which are in one-to-one correspondence with the cable parts in the front-back direction, the cable is fixed in the accommodating grooves, and the cable parts of the conductive terminals and the exposed conductors of the cable are embedded in the base. According to the invention, the cable is fixed through the accommodating groove of the insulating block so as to embed the front end of the cable in the base, so that the cable is not easy to loosen and the whole volume of the electric connector is smaller.

Description

Electrical connector

[ technical field ] A method for producing a semiconductor device

The present invention relates to an electrical connector, and more particularly, to an electrical connector in which a front end of a cable is embedded in a base.

[ background of the invention ]

Chinese utility model No. 203747078 discloses an electric connector, it includes the casing and assembles in the terminal module of casing, the casing includes the main part and the butt joint portion that extends forward from the main part, terminal module fixing has conductive terminal, and this conductive terminal extends backward and surpasss the casing in order to be connected with outside cable, thereby because the cable welding makes the easy pine of cable take off and electric connector and the whole volume of cable great in electric connector's outside.

Based on the above-mentioned drawbacks of the prior art, it is necessary to provide an electrical connector that holds a cable inside the electrical connector so that the cable is not easily loosened and the overall volume is reduced.

[ summary of the invention ]

The technical problem to be solved by the invention is as follows: provided is an electric connector which is not easy to loose a cable and has a small whole volume.

In order to solve the technical problems, the invention can adopt the following technical scheme:

an electric connector comprises a cable, a base, an insulating block and a plurality of conductive terminals, wherein the insulating block is positioned in the base, the conductive terminals are fixed on the insulating block, the base comprises a base part and a butt-joint tongue plate which extends forwards from the base part, the butt-joint tongue plate is provided with two opposite butt-joint surfaces, the conductive terminals comprise contact parts and cable parts which extend backwards from the contact parts, the contact parts are exposed out of the butt-joint surfaces of the butt-joint tongue plate, the front end of the cable comprises exposed conductors which are mechanically and electrically connected with the conductive terminals, the rear end of the insulating block is provided with accommodating grooves which are in one-to-one correspondence with the cable parts in the front-back direction, the cable is fixed in the accommodating grooves, and the cable parts of the conductive terminals and.

Compared with the prior art, the exposed conductor of the cable is accommodated by the cable part of the conductive terminal, and the accommodating groove of the insulating block is used for fixing the cable so as to embed the front end of the cable in the base, so that the cable is not easy to loosen and the whole volume of the electric connector is small.

[ description of the drawings ]

Fig. 1 is a perspective view of an electrical connector assembly of the present invention;

fig. 2 is another angular perspective view of the electrical connector assembly shown in fig. 1;

FIG. 3 is a partially exploded view of the electrical connector assembly of FIG. 1;

fig. 4 is a further exploded view of the terminal module of the electrical connector assembly of fig. 3;

fig. 5 is another exploded perspective view of the terminal module of fig. 4;

FIG. 6 is a partially exploded view of an upper terminal module of the terminal module of FIG. 5;

FIG. 7 is another exploded perspective view of the upper terminal module of FIG. 6;

fig. 8 is a cross-sectional view of the electrical connector assembly of fig. 1 taken along the dashed line a-a;

fig. 9 is a cross-sectional view of the electrical connector assembly of fig. 2 taken along the dashed line B-B;

fig. 10 is a perspective view of one of the conductive terminals of the electrical connector assembly of fig. 3;

FIG. 11 is a perspective view and a partial enlarged view of an upper dielectric block of the upper terminal module shown in FIG. 3; and

fig. 12 is a perspective view of a conductive terminal in another embodiment.

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

[ detailed description ] embodiments

Referring to fig. 1 to 3, an electrical connector 100 of the present invention includes a base 3, a plurality of conductive terminals 4, and a plurality of cables 1 connected to the conductive terminals 4, wherein the base 3 includes a base 32 and a tongue plate 31 extending forward from the base 32, the tongue plate 31 has two opposite mating surfaces 301, and the conductive terminals 4 include contact portions 42 exposed on the mating surfaces 301 of the tongue plate 31. In the embodiment, the conductive terminal 4 is first injection molded in the insulating material to form the terminal module 2, the terminal module 2 includes an upper terminal module 2a and a lower terminal module 2b, a metal shielding plate 6 is clamped between the two terminal modules 2a and 2b, the cable 1 is connected to the conductive terminal 4, and the insulating material is then injection molded outside the terminal module 2 and the cable 1 to form the insulating base 3.

The upper terminal module 2a and the lower terminal module 2b have substantially the same structure and are stacked and assembled vertically, so that the following description will be directed to one of the terminal modules. The rear parts of the upper terminal module and the lower terminal module are respectively connected with an upper row of cables 1a and a lower row of cables 1 b.

Referring to fig. 9, the conductive terminal 4 includes a board 41, and the board 41 includes a front board 411 and a rear board 412 bent downward from the front board 411 and then extending backward in parallel. The upper surface of the front plate 411 protrudes upward to form a boss-shaped contact portion 42, and the upper surface of the rear plate 412 is recessed downward to form an elongated groove 431, and the groove 431 forms a cable portion 43 for connecting the cable 1. The top surface 421 of the boss-shaped contact portion 42 is exposed to the abutting surface 301 of the tongue abutting plate 31 and is flush with the abutting surface. Of course, the cable portion 43 is not limited to the elongated groove structure, and may also be other structures, such as the slotted structure shown in fig. 10, in which the cable portion 43 of the conductive terminal 4 is an elongated slot 432 that is recessed downward from the upper surface of the rear plate 412 and penetrates through the lower surface.

Referring to fig. 6 and 7, the terminal module 2a includes a row of conductive terminals 4, an insulating block 5 injection-molded to fix the conductive terminals 4, a grounding strip 7 for fixing the cable 1, and a pressing member 8 mounted at the rear end of the insulating block 5. Referring to fig. 8, the insulating block 5 has a three-stage structure, and includes a first stage 51, a second stage 52, and a third stage 53 arranged from front to back. The front plate 411 and the contact portion 42 of the conductive terminal 4 are embedded in the first section 51 and the contact portion 42 protrudes upward and is exposed to the upper surface of the first section 51. Rear plate 412 and cable portion 43 are embedded in second stage 52, and cable portion 43 is exposed on the upper surface of second stage 52. The third section 53 of the insulating block 5 is provided with accommodating grooves 531 corresponding to the front and rear of the cable part 43, and the accommodating grooves 531 accommodate the cables 1. A stopping part 54 is arranged between the second section 52 and the third section 53 of the insulating block 5, a notch 541 is arranged at the position of the stopping part 54 corresponding to the accommodating groove 431, and the notch 541 penetrates through the upper surface of the insulating block 5 from front to back. The cable 1 extends to the cable portion 43 of the terminal 4 through the accommodation groove 531 and the notch 541 and is electrically connected to the cable portion 43.

The cable 1 includes a plurality of signal cables 11 for transmitting signals and a plurality of power cables 12 for transmitting power. The signal cables 11 are coaxial cables, the power cable 12 is a single core cable, a row of cables 1 are formed by the signal cables 11 and the power cable 12 and are connected to the conductive terminal 4, in this embodiment, the row of cables 1 includes the power cables 12 located on two sides of the outermost side and the signal cables 11 located in the middle of the power cables 12. The signal cable 11 includes a conductor 111, an inner insulating layer 112 covering the conductor 111, a metal braid 113 covering the inner insulating layer 112, and an outer insulating layer 114 covering the metal braid 113, wherein the conductor 111, the inner insulating layer 112, the metal braid 113, and the outer insulating layer 114 are sequentially disposed from inside to outside and are sequentially exposed forward and backward. The power cable 12 includes a conductor 121 and an outer insulating layer 122 covering the conductor 121. The power cables 12 in the cable 1 are soldered to the power terminals in the terminal module, the signal cables 11 are soldered to the signal terminals in the terminal module, and the ground terminals in the conductive terminals are connected to each other through the ground strip 7, as will be described in detail below.

The grounding strip 7 is a strip-shaped metal sheet, and includes a longitudinal body portion 71, a plurality of first contact arms 72 extending forward from the body portion 71, and second contact arms 73 extending backward from the body portion 71, wherein the first and second soldering arms 72, 73 are aligned one by one along the front-back direction. The grounding bar 7 is located below the cable 1, and the cable 1 is soldered to the grounding bar 7. The braid 113 of the signal cable 11 is soldered to the body portion 71 of the ground strip 7, and the first contact arm 72 is located beside each pair of differential pair signal cables 11 and extends forward to be flush with the front end of the conductor 111. The second contact arm 73 is bent and extended downward (i.e., away from the cable). Then, the row of cables 1 and the grounding bar 7 are assembled to the insulating block 5, the first contact arm 72 contacts the cable part 43 of the grounding terminal, and the second contact arm 73 is exposed outside the terminal module 2.

After the cable 1 and the grounding strip 7 are mounted to the insulating block 5, the pressing piece 8 is mounted. The pressing part 8 is formed by injection molding of an insulating material, and the pressing part 8 presses the cable 1 and is installed on the third section 53 of the insulating block 5. The bottom surface of the pressing member 8 is provided with receiving

holes

81 and 82 corresponding to the receiving groove 531, and the receiving groove 531 and the

receiving holes

81 and 82 define a space for receiving and fixing the cable 1 and the first contact arm 72. The accommodating groove 531 and the accommodating hole 81 corresponding to the accommodating cable 1 are semicircular grooves in which the inner insulating layer 112 of the signal cable 11 is accommodated; the receiving groove 531 and the receiving hole 82 corresponding to the first contact arm 72 are square grooves.

Referring to fig. 4 and 5, the metal shielding plate 6 is stamped with a plurality of front elastic pieces 61 and a plurality of rear elastic pieces 62 on a plate surface thereof, each front elastic piece 61 and each rear elastic piece 62 are aligned with each other in the front-rear direction and extend away from the metal shielding plate 6 in opposite directions, the extending directions of adjacent front elastic pieces 61 in the vertical direction are opposite, for example, the front elastic piece 61a extends upward, and the adjacent front elastic piece 61b extends downward; the rear resilient pieces 62b extend downward, and the adjacent rear resilient pieces 62a extend upward. The shielding plate 6 is provided with front and rear rows of rectangular windows 63, an extending part 64 is arranged between the front and rear rows of windows 63, and the front and rear

elastic sheets

61 and 62 extend towards the inside of the windows 63 from the front and rear edges of the extending part 64 respectively. Referring to fig. 6 and 12, the front elastic piece 61 and the rear elastic piece 62 respectively correspond to the contact portion 42 and the cable portion 43 of the ground terminal 4G in the vertical direction. The first section 51 of the insulating block 5 is provided with a through groove 511 corresponding to the contact portion 42 of the ground terminal 4G, and the second section 52 is provided with a through groove 521 corresponding to the cable portion 43 of the ground terminal 4G. The front elastic sheet 61 passes through the through slot 511 to be connected with the contact portion 42 of the ground terminal 4G, the rear elastic sheet 62 passes through the through slot 521 of the insulating block 5 to be connected with the cable portion 43 of the ground terminal 4G, and meanwhile, the second contact arm 73 is connected with the metal shielding plate 6 to form a ground loop, so that signal interference is reduced. The metal shielding plate 6 protrudes from the outer edge of the butt tongue 31 to divide the butt tongue 31 into two vertically symmetrical parts. The arrangement of the conductive terminals 4 corresponds to the front and back of the cable 1 and the first contact arms 72 of the grounding strip 7.

The bottom of the insulating block 5 is further provided with a positioning column 55 and a positioning hole 56, a through hole 65 is formed in the metal shielding plate 6 corresponding to the positioning column 55, and the positioning column 55 of the upper end sub-module 2a penetrates through the through hole 63 of the metal shielding plate 6 to be fixed to the positioning hole 56 of the lower end sub-module 2 b; the positioning posts 55 of the lower terminal module 2b are fixed to the positioning holes 56 of the upper terminal module 2a through the through holes 63 of the metal shielding plate 6, thereby fixing the upper terminal module 2a, the metal shielding plate 6 and the lower terminal module 2b together. As shown in fig. 3, the insulating base 3 is formed by coating the outer side of the terminal module 2 and the front end of the cable 1 with an insulating material by a manufacturing method of two-shot molding, thereby forming the complete electrical connector 100.

The method for manufacturing an electrical connector according to the present invention will be described with reference to fig. 1 to 8, and the method for manufacturing an electrical connector according to the present invention includes the following steps:

(1) providing an upper terminal module and a lower terminal module 2a and 2b, wherein the upper terminal module and the lower terminal module comprise an insulating block 5 and a row of conductive terminals 4 fixed in the insulating block 5, the conductive terminals 4 comprise contact parts 42 and cable parts 43 extending backwards from the contact parts 42, and the contact parts 42 and the cable parts 3 are exposed on the surface of the insulating block 5;

(2) providing two rows of cables 1, wherein each row comprises a signal cable 11 and a power supply cable 12, and the front end of each cable 1 is provided with an exposed conductor 111 and a metal braid 113;

(3) providing two grounding strips 7, positioning the grounding strips 7 below the row of cables 1, and welding the braided layer 113 of the cables 1 to the grounding strips;

(4) the row of cables 1 welded with the grounding strips 7 are assembled into the corresponding terminal modules 2, and the conductors 111 of the cables contact the cable parts 43 of the conductive terminals in the terminal modules 2 one by one. Wherein the first contact arm 72 of the ground strip 7 is located between the differential pair of signal terminals;

(5) providing a metal shielding plate 6, clamping the metal shielding plate 6 between the upper terminal module 2a and the lower terminal module 2b, wherein the second contact arm 73 of the grounding strip 7 contacts the shielding plate 6;

(6) and enclosing the insulating material on the outer side of the terminal module 2 and the front end of the cable 1 by an injection molding method to form an insulating base 3, wherein the base 3 is provided with a butt tongue plate 32, the contact part 42 of the conductive terminal 4 is exposed on the butt surface 301 of the butt tongue plate 32 of the base 3, and the cable part 43 of the conductive terminal 4 and the conductor 111 of the cable 1 are embedded in the insulating base 3.

The cable 1 of the invention is firstly contacted with the conductive terminals 4, and then the insulating material is injected outside the conductive terminals and the conductive terminals to form the insulating base 3, which is beneficial to greatly reducing the whole volume of the electric connector 100. Referring to fig. 11, the base 3 has a rear end face 321, the cable portion 43 of the conductive terminal 4 is located at the rear end of the tongue plate 31, the exposed conductor 111 of the cable 1 is welded to the cable portion 43, the exposed conductor 111 is located in the base 3, the inner insulating layer 112 is located behind the exposed conductor 111, most of the inner insulating layer 112 is also located in the base 3, the braid 113 is located behind the rear end face 321 of the base 3, the main portion 71 of the ground strip 7 and the braid 113 are vertically corresponding and welded together, and the metal shielding plate 6 extends out of the rear end face 321 of the base 3. Fig. 12 shows a state in which the pair of front and rear

resilient pieces

61 and 62 in the present embodiment are in contact with the upper and lower rows of conductive terminals, the front resilient piece 61 is connected to the front plate 411 of the lower row of ground terminals 4G, the rear resilient piece 62 is connected to the rear plate 412 of the upper row of ground terminals 42G, the braid 113 is connected to the main body 71 of the ground strip 7, and the second contact arm 73 of the ground strip 7 is in contact with the rear end of the metal shielding plate 6, thereby achieving a good grounding effect.

Compared with the prior art, the front end of the cable 1 is embedded in the base 3, so that the cable 1 is not easy to loosen, the overall volume of the electric connector assembly 100 is greatly reduced, and the signal interference between terminals is reduced. In addition, the front and rear

elastic sheets

61 and 62 on the metal shielding plate 6 are connected with the grounding terminal 4G, so that the crosstalk of the electric connector 100 of the invention when transmitting high-frequency signals is greatly reduced, and the transmission quality of the high-frequency signals is effectively ensured.

The above-described embodiments are presently preferred, but not necessarily all, embodiments of the invention. Any equivalent variations of the technical solutions of the present invention that a person of ordinary skill in the art would take upon reading the present specification are covered by the claims of the present invention.

Claims

1. An electric connector comprises a cable, a base, an insulating block positioned in the base and a plurality of conductive terminals fixed on the insulating block, wherein the base is formed by injection molding and comprises a base part and a butt joint tongue plate extending forwards from the base part, the butt joint tongue plate is provided with two opposite butt joint surfaces, each conductive terminal comprises a contact part and a cable part extending backwards from the contact part, the contact parts are exposed on the butt joint surfaces of the butt joint tongue plates, the front end of the cable comprises a bare conductor which is mechanically and electrically connected with the conductive terminals, and the electric connector is characterized in that: the rear end of the insulating block is provided with accommodating grooves which are in one-to-one correspondence with the cable parts in the front-back direction, the cable is fixed in the accommodating grooves, the cable parts of the conductive terminals and the exposed conductors of the cable are embedded in the base, the electric connector further comprises a pressing piece which is installed at the rear end of the insulating block, the pressing piece is installed at the position corresponding to the accommodating grooves and is provided with accommodating holes which are in one-to-one correspondence with the accommodating grooves, and the pressing piece is used for pressing the cable and sealing the rear end of the base.

2. The electrical connector of claim 1, wherein: the cable further comprises an inner insulating layer, a metal braid layer and an outer insulating layer which are sequentially coated on the outer side of the conductor, the inner insulating layer, the metal braid layer and the outer insulating layer are sequentially exposed from front to back, and the exposed inner insulating layer is contained in the containing groove and is pressed and fixed by the pressing piece.

3. The electrical connector of claim 2, wherein: the electric connector further comprises a grounding strip, the grounding strip comprises a main body part and a first contact arm extending forwards from the main body part, a braid of the cable is welded to the main body part of the grounding strip, and the first contact arm extends forwards to be flush with an exposed conductor of the cable.

4. The electrical connector of claim 3, wherein: the cable and the first contact arm penetrate through the accommodating groove to extend to the cable part and are electrically connected with the cable part through welding.

5. The electrical connector of claim 3, wherein: the insulating block is of a three-section structure and comprises a first section, a second section and a third section which are arranged from front to back, the contact part of the conductive terminal is fixed on the first section, the cable part is fixed on the second section, and the accommodating groove is formed in the third section of the insulating block.

6. The electrical connector of claim 5, wherein: the accommodating groove and the accommodating hole corresponding to the accommodating cable are semicircular grooves, and the accommodating groove and the accommodating hole corresponding to the accommodating first contact arm are square grooves.

7. The electrical connector of claim 1, wherein: the electric connector also comprises an upper terminal module and a lower terminal module, wherein the upper terminal module and the lower terminal module respectively comprise a row of conductive terminals and an insulating block for fixing the conductive terminals through injection molding, and the upper terminal module and the lower terminal module are stacked along the vertical direction and are clamped with metal shielding plates.

8. The electrical connector of claim 7, wherein: the bottom of the insulating block is provided with a positioning column and a positioning hole, and the metal shielding plate is provided with a through hole corresponding to the positioning column and the positioning hole.

9. The electrical connector of claim 7, wherein: the base is coated at the front end of the cable and the outer sides of the upper end sub-module and the lower end sub-module in an injection molding mode.