CN111525323A

CN111525323A - Electrical connector

Info

Publication number: CN111525323A
Application number: CN202010318643.6A
Authority: CN
Inventors: 游万益; 洪永炽; 梁丽丽; 张勇刚; 郑峰
Original assignee: Alltop Electronics Suzhou Co Ltd; Alltop Technology Co Ltd
Current assignee: Alltop Electronics Suzhou Co Ltd; Alltop Technology Co Ltd
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2020-08-11
Also published as: CN107645084B; CN107645084A

Abstract

The invention provides an electric connector, which comprises an insulating body and conductive terminals, wherein the bottom wall of the insulating body is provided with a first part, a second part and a protruding part which are arranged at intervals, a contact arm of the first terminal in the conductive terminals is arranged on the top wall of the insulating body side by side, contact arms of the second terminal and the third terminal are respectively arranged on the first part and the second part side by side, a contact arm of the fourth terminal is arranged on the protruding part, the distance between a fixing part and a welding leg of the fourth terminal in the height direction is larger than the distance between the fixing part and the welding leg of the second terminal in the height direction, each conductive terminal is also provided with an extending part positioned between the fixing part and the welding leg, the extending part of the first terminal is formed by bending and extending downwards from the fixing part, the extending part of the conductive terminal positioned on the bottom wall is arranged in an upward arch mode, so that the welding leg of the, Is soldered on the circuit board. The electric connector effectively improves the coplanarity of the welding feet of the conductive terminals on the bottom wall.

Description

Electrical connector

Technical Field

The present invention relates to an electrical connector, and more particularly, to an electrical connector with good coplanarity.

Background

The Interface specification for electronic products such as data transmission, data storage, and image display is various, and the Interface specification is from ata (Advanced Technology attachment) which was widely used in the early days to SCSI (Small Computer System Interface), sata (Serial Advanced Technology attachment), and more recent SAS Interface (Serial SCSI). For many emerging applications requiring high-speed data transmission, serial technology can solve the performance bottleneck problem faced by the traditional parallel technology, Serial Attached SCSI (SAS) is the development of parallel SCSI based serial technology, and besides the advantage of higher signal transmission rate, SAS interface can be compatible with SATA driver, and the volume is much smaller than SCSI.

When the SATA interface has evolved to encounter a bottleneck in transmission rate, by utilizing PCIe as a breach, a SATA Express interface (SATA + PCIe) is thus created; when the development of the SAS interface meets the bottleneck of the transmission rate, PCIe is also used for breakthrough, and U.2(SFF-8639) is generated, which is a combination of the SAS interface and the PCIe interface, and since the SAS interface itself can be compatible with SATA, the SFF-8639 interface can be compatible with connectors of SATA, SAS, SATA Express, PCIe, and other specifications. The SFF-8639 connector mainly supports high-speed serial signals and power supplies, generally adopts an enhanced design, and can achieve higher reliability in compact storage applications, however, the SFF-8639 connector is smaller in overall size and has more terminals, and thus the solder pin coplanarity of the terminals is difficult to guarantee.

In view of the above, there is a need for an improved electrical connector to solve the above problems.

Disclosure of Invention

The invention aims to provide an electric connector with good coplanarity.

To achieve the above object, the present invention provides an electrical connector for being mounted on a circuit board, comprising an insulative housing, a plurality of conductive terminals fixed on the insulative housing, the insulative housing having a main body portion and a mating portion extending forward from the main body portion, the mating portion having a top wall, a bottom wall and a mating space formed between the top wall and the bottom wall, the bottom wall having a first portion, a second portion and a protruding portion between the first portion and the second portion and protruding in a direction away from the mating space, each conductive terminal having a fixing portion fixed on the main body portion, a contact arm extending forward from a front end of the fixing portion, and a solder foot at a rear end thereof for connecting to the circuit board, the conductive terminals including a plurality of first terminals, a plurality of second terminals, a plurality of third terminals and a plurality of fourth terminals, the contact arms of the first terminals being arranged side by side on the top wall and protruding into the mating space, the contact arms of the second terminal and the third terminal are arranged on the first part and the second part of the bottom wall side by side respectively, the contact arm of the fourth terminal is arranged on the protruding part of the bottom wall side by side, the distance between the fixing part of the fourth terminal and the solder leg in the height direction is larger than the distance between the fixing part of the second terminal and the solder leg in the height direction, each conductive terminal is also provided with an extending part which is positioned between the fixing part and the solder leg and is connected with the fixing part and the solder leg, the extending part of the first terminal is formed by extending downwards from the fixing part of the first terminal, and the extending part of the conductive terminal positioned on the bottom wall is arranged in an upward arch shape so that the solder leg of the conductive terminal and the solder leg of the first terminal are positioned at the.

As a further improvement of the present invention, the number of times of bending between the fixing portions of the second, third, and fourth terminals and the corresponding solder tails is greater than the number of times of bending between the fixing portions of the first terminals and the solder tails.

As a further improvement of the present invention, the solder tail of the fourth terminal is located on an upper side of the fixing portion thereof in the height direction.

As a further improvement of the present invention, a distance between the fixing portion of the fourth terminal and the solder tail in the height direction is larger than a distance between the fixing portion of the third terminal and the solder tail in the height direction.

As a further improvement of the present invention, the fixing portion of the second terminal is spaced apart from the solder tail in the height direction, and the fixing portion of the third terminal is spaced apart from the solder tail in the height direction.

As a further improvement of the present invention, the distance between the fixing portion of the second terminal and the solder tail in the height direction is the height of at least one second terminal fixing portion.

As a further improvement of the present invention, the electrical connector further includes an insulating block injection-molded outside the fixing portions of the plurality of first terminals, the insulating block has a positioning portion that is positioned in cooperation with the main body portion of the insulating body, the main body portion has a mounting space that is located at the rear side and is open rearward and mounting walls that are located at both sides of the mounting space, the positioning portion is a positioning protrusion protruding from both sides, and the mounting wall is concavely provided with a positioning groove that extends in the front-rear direction.

As a further improvement of the present invention, the extending portion of the conductive terminal on the bottom wall protrudes upwards into the corresponding receiving slot on the insulating block.

As a further improvement of the present invention, the fixing portion of the first terminal has a base body which is widened in size in the lateral direction, the width of the base body being larger than the width of the contact portion and/or the solder tail thereof.

As a further improvement of the present invention, the first terminal has protruding portions at both sides of the fixing portion, the protruding portions being positioned in front of the base body, and the protruding portions being positioned in interference with the insulating body.

The distance between the fixing part of the fourth terminal and the solder leg of the electric connector arranged on the projecting part in the height direction is larger than the distance between the fixing part of the second terminal and the solder leg in the height direction, so that the conductive terminal on the bottom wall can have better coplanarity, meanwhile, the extending part of the first terminal on the top wall is formed by extending downwards from the fixing part, the extending part of the conductive terminal on the bottom wall is arranged in an upward arch manner, so that the solder leg and the solder leg of the first terminal are positioned at the same height to be flatly pasted and welded on the circuit board, the solder leg of the conductive terminal can be flatly pasted and welded on the circuit board to obtain good integral welding quality, and the electric connector is of a sinking plate type structure to realize the product requirement of low height.

Drawings

Fig. 1 is a perspective assembly view of the electrical connector of the present invention mounted on a circuit board.

Fig. 2 is a view of the electrical connector of fig. 1 from another perspective.

Fig. 3 is a partially exploded view of the electrical connector shown in fig. 1.

Fig. 4 is a view of the electrical connector of fig. 3 from another perspective.

Fig. 5 is a partial assembly view of the electrical connector shown in fig. 3.

Fig. 6 is a perspective view of a first terminal of the electrical connector shown in fig. 3.

Fig. 7 is a perspective view of a fourth terminal of the electrical connector shown in fig. 3.

Fig. 8 is a side view of a fourth terminal of the electrical connector of fig. 7.

Fig. 9 is a side view of a second terminal of the electrical connector shown in fig. 3.

Fig. 10 is a stepped sectional view taken along line a-a of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 10, an electrical connector 100 of the present invention is shown, which is used for being soldered to a circuit board 5, and includes an insulating body 1 and a plurality of conductive terminals 2 installed in the insulating body 1, wherein the electrical connector 100 is positioned and locked on the circuit board 5 by fixing members 4 inserted at two sides of the insulating body 1.

As shown in fig. 1 to 5 and 10, the insulating main body 1 is elongated, and has a main body 11 and an abutting portion 12 extending forward from the main body 11, the abutting portion 12 has a top wall 101, a bottom wall 102 and an abutting space 103 formed between the top wall 101 and the bottom wall 102, and the bottom wall 102 has a first portion 121, a second portion 122 and a protruding portion 123 located between the first portion 121 and the second portion 122 and protruding away from the abutting space 103.

The main body 11 has a mounting surface 110, a mounting space 112 located behind the mounting surface 110 and opened rearward, and a pair of mounting walls 113 located at both sides of the mounting space 112, and a positioning groove 1131 extending in the front-rear direction is recessed outward from an inner side surface of each of the mounting walls 113. The mounting surface 110 and the pair of mounting walls 113 together enclose the mounting space 112. The mounting surface 110 of the main body 11 is recessed forward to form a slot 115, the slot 115 is elongated and extends from one mounting wall 113 to the other mounting wall 113 along a transverse direction, and the positioning groove 1131 is communicated with the slot 115.

The conductive terminals 2 are fixed on the insulating body 1, and each conductive terminal 2 has a fixing portion 21 fixed on the main body portion 11, a contact arm 22 extending forward from the front end of the fixing portion 21 to the mating portion 12, and a solder leg 24 located at the rear end thereof for connecting to a circuit board. The conductive terminal 2 further has an extension portion 23 located between and connecting the fixing portion 21 and the solder leg 24.

The conductive terminal 2 includes a plurality of first terminals 201, a plurality of second terminals 202, a plurality of third terminals 203 and a plurality of fourth terminals 204, and the extending portion 23 of the first terminal 201 is formed by extending downward from the fixing portion 21 thereof; the extending portion 23 of the conductive terminal 2 (at least one of the second, third and

fourth terminals

202, 203 and 204) on the bottom wall 102 is upwardly arched so as to protrude into the corresponding receiving slot 33 of the insulating block 3. In this embodiment, the top surfaces of the extensions 23 of the conductive terminals 2 on the bottom wall 102 are flush.

The contact arms 22 of the first terminal 201 are arranged side by side on the top wall 101 and protrude downward into the mating space 103, the contact arms 22 of the second terminal 202 and the third terminal 203 are arranged side by side on the first portion 121 and the second portion 122 of the bottom wall 102, respectively, and the contact arms 22 of the fourth terminal 204 are arranged side by side on the protruding portion 123 of the bottom wall. The contact arms 22 of the second terminal 202, the third terminal 203 and the fourth terminal 204 protrude upwards into the mating space 103, and are disposed at two sides of the mating space 103 opposite to the contact arms 22 of the first terminal 201 along the height direction of the insulating body 1. The second terminal 202 and the contact arm 22 of the third terminal 203 are located at the same height, the contact arm 22 of the first terminal 201 is located above the contact arm 22 of the second terminal 202 in the height direction, and the contact arm 22 of the fourth terminal 204 is located below the contact arm 22 of the second terminal 202 in the height direction.

The solder tails 24 of the second, third and

fourth terminals

202, 203, 204 are arranged flush and in a row in the transverse direction, and are located in front of the solder tails 24 of the first terminal 201. In the present embodiment, the extending portion 23 and the solder tail 24 of the fourth terminal 204 are formed by tearing from the rear end of the fixing portion 21, and the width of the fixing portion 21 in the transverse direction is greater than the width of the corresponding extending portion 23 and/or solder tail 24.

As shown in fig. 6, the fixing portion 21 of the first terminal 201 has a base 211 with a width in the transverse direction, and the width of the base 211 is larger than the width of the contact portion 22 and/or the solder tail 24. Meanwhile, the first terminal 201 has protruding portions 212 located in front of the mounting surface 110 on both sides of the fixing portion 21 and positioned by interference with the insulating main body 1, and the protruding portions 212 are located in front of the base 211.

Referring to fig. 8 and 9, in the height direction, the solder tail 24 of the fourth terminal 204 is located above the fixing portion 21, specifically, the distance between the fixing portion 21 of the fourth terminal 204 and the solder tail 24 in the height direction is L1, the distance between the fixing portion 21 of the second terminal 202 and the solder tail 24 in the height direction is L2, the distance between the fixing portion 21 of the third terminal 203 and the solder tail 24 in the height direction is L3, wherein L1 is greater than L2, and L1 is greater than L3.

The distance L2 between the fixing portion 21 of the second terminal 202 and the solder tail 24 in the height direction is not zero, that is, there must be a certain distance between the fixing portion 21 of the second terminal 202 and the solder tail 24 in the height direction, and the distance L2 is the height of at least one fixing portion 21 of the second terminal 202. Similarly to the second terminal 202, the fixing portion 21 of the third terminal 203 and the solder tail 24 are necessarily located at a certain distance in the height direction, i.e., L3 is not zero.

The electrical connector 100 of the present invention further includes an insulating block 3 injection-molded outside the fixing portions 21 of the plurality of first terminals 201, wherein the insulating block 3 has a positioning portion 31 that is positioned in cooperation with the main body portion 11 of the insulating body 1, in this embodiment, the positioning portion 31 is a positioning protrusion protruding outward from two sides of the insulating block 3, the positioning protrusion extends in the front-back direction, and the front end of the positioning protrusion has a tapered guiding portion 311 to utilize the insertion of the positioning portion 31 into the insulating body 1. The positioning portion 31 is inserted into the corresponding positioning groove 1131 provided at the rear side of the main body portion 11 from the rear to the front and is engaged with the same, the insertion portion 32 provided at the front side of the insulation block 3 extends into the slot 115 of the insulation body 1, and the blocking surface 30 located at the rear side of the insertion portion 32 is abutted to the mounting surface 110 of the insulation body 1 from the front.

The bottom of the insulating block 3 is provided with a plurality of accommodating grooves 33 which are recessed upwards and arranged along the transverse direction, the accommodating grooves 33 are formed by a plurality of guiding convex blocks 34 arranged at the bottom of the insulating block 3 at intervals, the extending parts 23 of the conductive terminals 2 positioned on the bottom wall 102 are in one-to-one correspondence with the accommodating grooves 33 and limited by the guiding convex blocks 34 at two sides so as to ensure the position degree and the normal degree of the conductive terminals 2 positioned on the bottom wall 102, and when the insulating block 3 is assembled to the insulating body 1, the guiding convex blocks 34 with the sharpened front ends can be conveniently inserted into the corresponding extending parts 23.

The electric connector 100 of the invention is a sinking plate type, which effectively ensures the coplanarity of the welding feet of the first terminals 201 with a plurality of terminals through the insulating blocks 3 which are injection molded outside the first terminals 201, and the welding feet 24 of the conductive terminals 2 are positioned at the same height to be flatly pasted and welded on the circuit board 5, so that the conductive terminals 2 are simpler to insert, assemble and position.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.

Claims

1. An electric connector is used for being installed on a circuit board and comprises an insulating body and a plurality of conductive terminals fixed on the insulating body, wherein the insulating body is provided with a main body part and a butting part extending forwards from the main body part, the butting part is provided with a top wall, a bottom wall and a butting space formed between the top wall and the bottom wall, the bottom wall is provided with a first part, a second part and a protruding part which is positioned between the first part and the second part and protrudes towards the direction deviating from the butting space, each conductive terminal is provided with a fixing part fixed on the main body part, a contact arm extending forwards from the front end of the fixing part and a welding foot positioned at the rear end of the contact arm and connected with the circuit board, the conductive terminals comprise a plurality of first terminals, a plurality of second terminals, a plurality of third terminals and a plurality of fourth terminals, the contact arm of the first terminals are arranged on the top wall side, the contact arm of second terminal and third terminal is and sets up respectively on the first portion and the second portion of diapire side by side, and the contact arm of fourth terminal sets up on the protruding portion of diapire side by side, its characterized in that: the distance between the fixing part and the solder leg of the fourth terminal in the height direction is greater than the distance between the fixing part and the solder leg of the second terminal in the height direction, each conductive terminal is also provided with an extending part which is positioned between the fixing part and the solder leg and is connected with the fixing part and the solder leg, the extending part of the first terminal is formed by bending and extending downwards from the fixing part, and is positioned on the bottom wall, the extending part of the conductive terminal is upwards arched and arranged, so that the solder leg of the conductive terminal and the solder leg of the first terminal are positioned at the same height and are flatly attached and welded on the circuit board.

2. The electrical connector of claim 1, wherein: the number of times of bending between the fixing portions of the second terminal, the third terminal and the fourth terminal and the corresponding solder leg is more than the number of times of bending between the fixing portion of the first terminal and the solder leg.

3. The electrical connector of claim 1, wherein: in the height direction, the solder leg of the fourth terminal is located on the upper side of the fixing part.

4. The electrical connector of claim 1, wherein: the distance between the fixing part of the fourth terminal and the solder leg in the height direction is greater than the distance between the fixing part of the third terminal and the solder leg in the height direction.

5. The electrical connector of claim 4, wherein: the fixed part of the second terminal has a certain distance with the solder leg in the height direction, and the fixed part of the third terminal has a certain distance with the solder leg in the height direction.

6. The electrical connector of claim 5, wherein: the distance between the fixing part of the second terminal and the solder leg in the height direction is the height of at least one second terminal fixing part.

7. The electrical connector of claim 1, wherein: the electric connector is characterized in that the electric connector is also provided with an insulating block which is formed by injection molding outside the fixing parts of the first terminals, the insulating block is provided with a positioning part which is matched and positioned with the main body part of the insulating body, the main body part is provided with an installation space which is arranged at the rear side and is opened backwards and installation walls which are arranged at two sides of the installation space, the positioning part is a positioning protruding block which protrudes towards two sides, and a positioning groove which extends along the front and rear directions is concavely arranged on the installation walls.

8. The electrical connector of claim 7, wherein: the extending part of the conductive terminal on the bottom wall extends upwards into the corresponding accommodating groove arranged on the insulating block.

9. The electrical connector of claim 1, wherein: the fixing portion of the first terminal has a base body which is widened in size in the lateral direction, and the width of the base body is larger than the width of the contact portion and/or the solder tail thereof.

10. The electrical connector of claim 9, wherein: the two sides of the fixed part of the first terminal are provided with protruding parts which are positioned in an interference way with the insulating body, and the protruding parts are positioned in front of the substrate.