Electrical connector

Abstract

The utility model provides a kind of electric connector, it includes insulating body, conductive terminal and insulating rear plug fixed in insulating body, the insulating body has the main part of lengthways, the main part includes base, top wall and bottom wall oppositely arranged in the height direction two sides of base, the conductive terminal includes the upper row conductive terminal installed in top wall and the lower row conductive terminal installed in bottom wall, the welding section of the upper row conductive terminal is arranged into a row along lengthways direction, the welding section of the lower row conductive terminal is arranged into another row along lengthways direction, the base has the limiting slot recessed and formed from its rear surface to front, the insulating rear plug has the front protruding portion protruding to front, the front protruding portion is inserted into the limiting slot from rear to front, the insulating rear plug is abutted to the inclined section of the upper row conductive terminal upward, and the welding section of the lower row conductive terminal downward. The conductive terminal of the utility model electric connector has preferable flatness.

Description

Technical Field

[0001] This utility model relates to an electrical connector, and more particularly to an electrical connector with better flatness. Background Technology

[0002] SAS connectors primarily support high-speed serial signals and power, and generally employ an enhanced design to achieve higher reliability in compact storage applications. Traditional SAS connectors consist of a longitudinally elongated insulating body, two rows of conductive terminals fixed within the insulating body, and a back plug integrally molded with one of the conductive terminals. However, the elongated shape of the back plug poses a risk of warping, and the conductive terminals integrally molded with the back plug suffer from poor heat dissipation and high-frequency performance due to being encased in plastic, resulting in higher manufacturing costs. Furthermore, the other row of conductive terminals, not integrally molded with the back plug, has a larger number of solder pads, making it difficult to guarantee flatness.

[0003] In view of this, it is necessary to improve the existing electrical connectors to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an electrical connector with better flatness of conductive terminals.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides an electrical connector, comprising an insulating body, conductive terminals fixed to the insulating body, and an insulating rear plug. The insulating body has a longitudinally elongated main body portion, which includes a base, a top wall and a bottom wall disposed opposite to each other on both sides of the base in the height direction. The conductive terminals include an upper row of conductive terminals mounted on the top wall and a lower row of conductive terminals mounted on the bottom wall. The soldering sections of the upper row of conductive terminals are arranged in one row along the longitudinal direction, and the soldering sections of the lower row of conductive terminals are arranged in another row along the longitudinal direction. The base has a limiting groove formed by a recess from its rear surface forward. The insulating rear plug has a forward-protruding front protrusion, which is inserted into the limiting groove from rear to front. The insulating rear plug abuts upward against the inclined section of the upper row of conductive terminals and downward against the soldering section of the lower row of conductive terminals.

[0006] As a further improvement of this utility model, the lower row of conductive terminals includes a first terminal, a second terminal and a third terminal arranged in the longitudinal direction, the first terminal and the second terminal are disposed on both sides of the third terminal in the longitudinal direction, and the protrusion is located at the corresponding position of the third terminal in the longitudinal direction.

[0007] As a further improvement of this utility model, each of the conductive terminals includes a retaining section fixed in the insulating body, a contact section located in front of the retaining section and having elasticity, and a welding section located behind the retaining section. The upper row of conductive terminals also has an inclined section that connects the retaining section and the welding section.

[0008] As a further improvement of this utility model, the depth of the forward recess of the limiting groove is greater than twice the protrusion length of the forward protrusion in the front-back direction.

[0009] As a further improvement of this utility model, the insulating rear plug has a plurality of first protrusions that protrude upwards, the plurality of first protrusions being arranged at the front of the insulating rear plug, and the first protrusions abutting forward against the rear end face of the base.

[0010] As a further improvement of this utility model, the insulating rear plug also has a plurality of upwardly protruding second protrusions, the plurality of second protrusions being arranged at the rear of the insulating rear plug, and a second protrusion being provided between adjacent inclined sections of the upper row of conductive terminals.

[0011] As a further improvement of this utility model, the thickness of the welding section of the first terminal and the second terminal in the height direction is greater than the thickness of the third terminal in the height direction. The insulating back plug has a first abutting part and a second abutting part that protrude downwards. The first abutting part abuts downwards against the first terminal and the second terminal, and the second abutting part abuts downwards against the third terminal.

[0012] As a further improvement of this utility model, the first abutting part and the second abutting part are staggered in the front-back direction, and the second abutting part is located in front of the first abutting part in the front-back direction.

[0013] As a further improvement of this utility model, the lower row of conductive terminals also has a connecting section that connects the holding section and the welding section. The connecting section includes a first connecting portion extending from the holding section toward the inclined section, a horizontal portion extending rearward from the first connecting portion, and a second connecting portion extending downward at the rear end of the horizontal portion. The contact sections of the third terminal are arranged above the contact sections of the first and second terminals.

[0014] As a further improvement of this utility model, the insulating body also has a pair of mounting portions extending rearward from the main body portion. The pair of mounting portions are disposed opposite to each other on both sides of the main body portion in the longitudinal direction. Each mounting portion is provided with a guide groove extending in the front-rear direction and a snap-fit ​​groove that intersects and communicates with the guide groove. The insulating rear plug also has a pair of guide rails located on both sides of the front protrusion and a snap-fit ​​portion protruding outside the guide rails. The guide rails are inserted into the guide grooves and slide therein until the snap-fit ​​portion snaps into the snap-fit ​​groove.

[0015] This utility model of an electrical connector ensures that the position of the insulating back plug relative to the insulating body is precisely fixed in both the front-to-back and vertical directions by inserting the protruding part of the insulating back plug into the limiting groove provided on the base. This prevents warping of the middle part of the longitudinally elongated insulating back plug, thereby establishing a reliable installation reference for the two rows of conductive terminals. By pressing the insulating back plug downward against the welding section of the lower row of conductive terminals, the upward warping deformation of the lower row of conductive terminals caused by their own stress or processing errors is eliminated, pressing the welding section of the lower row of conductive terminals against the circuit board. By pressing the insulating back plug upward against the inclined section of the upper row of conductive terminals, the upper row of conductive terminals is fixed. This ensures the positional accuracy of the welding sections of both rows of conductive terminals. Attached Figure Description

[0016] Figure 1 This is a three-dimensional assembly diagram of the electrical connector of this utility model.

[0017] Figure 2 yes Figure 1 A partially exploded view of the electrical connector shown.

[0018] Figure 3 yes Figure 2 Further assembly diagram of the electrical connector shown.

[0019] Figure 4 yes Figure 2 A partially enlarged view of the insulating back plug of the electrical connector shown.

[0020] Figure 5 yes Figure 1 The electrical connector shown is a cross-sectional view.

[0021] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0022] Figure 7 yes Figure 1 A partial cross-sectional view of the electrical connector shown. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figures 1 to 7 The present invention is shown as a preferred embodiment of the electrical connector 100, which is used to be mounted on an external circuit board (not shown). The connector 100 includes an insulating body 1, conductive terminals 2 fixed to the insulating body 1, and an insulating back plug 3.

[0025] For ease of explanation, when describing the electrical connector 100 below, the mating direction of the electrical connector 100 will be regarded as the front-to-back direction, and the direction perpendicular to both the front-to-back direction and the longitudinal direction will be regarded as the height direction.

[0026] Please refer to Figures 1 to 3 and Figure 5 As shown, the insulating body 1 has a longitudinally elongated main body 12, which includes a base 121, a top wall 122 and a bottom wall 123 disposed opposite to each other on both sides of the base 121 in the height direction.

[0027] In this embodiment, the base 121 has a limiting groove 1212 recessed from its rear surface forward. Furthermore, the insulating body 1 also has a pair of mounting portions 13 extending rearward from the main body 12. The pair of mounting portions 13 are disposed opposite to each other on both sides of the main body 12 in the longitudinal direction. Each mounting portion 13 has a guide groove 131 extending in the front-rear direction and a snap-fit ​​groove 132 that intersects and communicates with the guide groove 131.

[0028] Please refer to Figures 2 to 3 , Figures 5 to 7 As shown, the conductive terminal 2 includes an upper row of conductive terminals 2a installed on the top wall 122 and a lower row of conductive terminals 2b installed on the bottom wall 123. The welding sections of the upper row of conductive terminals 2a are arranged in one row along the longitudinal direction, and the welding sections of the lower row of conductive terminals 2b are arranged in another row along the longitudinal direction.

[0029] Each of the conductive terminals 2 includes a retaining section 201 fixed within the insulating body 1, a resilient contact section 202 located in front of the retaining section 201, and a welding section 203 located behind the retaining section 201. The upper row of conductive terminals 2a also has an inclined section 204 connecting the retaining section 201 and the welding section 203.

[0030] The lower row of conductive terminals 2b includes a first terminal 21, a second terminal 22, and a third terminal 23 arranged in the longitudinal direction, with the first terminal 21 and the second terminal 22 disposed on both sides of the third terminal 23 in the longitudinal direction.

[0031] The thickness of the welding section 203 of the first terminal 21 and the second terminal 22 in the height direction is greater than the thickness of the third terminal 23 in the height direction. The welding section 203 of the first terminal 21 and the second terminal 22 is partially offset from the welding section 203 of the third terminal 23 in the front-back direction.

[0032] In addition, the lower row of conductive terminals 2b also has a connecting section 205 that connects the retaining section 201 and the welding section 203. The connecting section 205 includes a first connecting portion 2051 extending from the retaining section 201 toward the inclined section 204, a horizontal portion 2052 extending rearward from the first connecting portion 2051, and a second connecting portion 2053 extending downward at the rear end of the horizontal portion 2052. The contact section 202 of the third terminal 23 is arranged above the contact section 202 of the first and second terminals 21 and 22.

[0033] Please refer to Figures 2 to 7 As shown, the insulating rear plug 3 has a forward protrusion 31, which is inserted into the limiting groove 1212 from back to front. The insulating rear plug 3 abuts upward against the inclined section of the upper row of conductive terminals 2a and abuts downward against the welding section of the lower row of conductive terminals 2b.

[0034] Thus, by inserting the front protrusion 31 of the insulating back plug 3 into the limiting groove 1212 provided on the base 121, it can be ensured that the position of the insulating back plug 3 itself relative to the insulating body 1 in the front-back and up-down directions is precisely fixed, avoiding warping of the middle part of the longitudinally elongated insulating back plug 3, thereby establishing a reliable installation reference for the two rows of conductive terminals 2; by pressing the insulating back plug 3 downward against the welding section of the lower row of conductive terminals 2b, the upward warping deformation of the lower row of conductive terminals 2b caused by its own stress or processing error is eliminated, and the welding section of the lower row of conductive terminals 2b is simultaneously "pressed" onto the circuit board.

[0035] By having the insulating back plug 3 abut against the inclined section of the upper row of conductive terminals 2a, "indirect stabilization" and "reaction force" fixation of the upper row of conductive terminals 2a are achieved, preventing the welding section 203 of the upper row of conductive terminals 2a from "sagging" due to gravity or material stress under the high temperature of reflow soldering. At the same time, the insulating back plug 3 itself is firmly clamped between the upper and lower rows of conductive terminals 2a and 2b, forming a stable overall structure. In addition, the flatness control of the welding section 203 of the upper and lower rows of conductive terminals 2a and 2b is completed synchronously in the same assembly step through the same insulating back plug 3, avoiding the cumulative error caused by using multiple parts for fixing separately, and ensuring that the relative positional relationship between the upper and lower rows of conductive terminals 2a and 2b and the coplanarity within each row are optimally controlled.

[0036] The protruding portion 31 is located at the corresponding position of the third terminal 23 in the longitudinal direction. Since the number of third terminals 23 is relatively small, placing the protruding portion 31 and the limiting groove 1212 at the corresponding position of the third terminal 23 can avoid the area where the first terminal 21 and the second terminal 22, which have a large number of terminals, are located, thus avoiding weakening the structural strength of the insulating body 1. At the same time, it can achieve a more balanced combination between the insulating back plug 3 and the insulating body 1.

[0037] The insulating rear plug 3 also has a pair of guide rails 32 located on both sides of the front protrusion 31 and a latching part 34 protruding from the outside of the guide rails 32. The guide rails 32 are inserted into the guide groove 131 and slide therein until the latching part 34 latches with the latching groove 132.

[0038] In this way, it can be ensured that the insulating back plug 3 can only move along the preset front-back direction during the insertion process, preventing misalignment or tilting in the longitudinal and height directions, thereby ensuring that the front protrusion 31 can be accurately aligned and inserted into the limiting groove 1212 of the base 121, and at the same time ensuring that the insulating back plug 3 applies a uniform and consistent abutment force to the upper and lower conductive terminals 2a and 2b, thereby achieving high-quality coplanarity control.

[0039] In this embodiment, the depth of the forward recess of the limiting groove 1212 is greater than twice the protrusion length of the forward protrusion 31 in the front-back direction.

[0040] The insulating rear plug 3 has a plurality of first protrusions 35 that protrude upwards, the plurality of first protrusions 35 being arranged at the front of the insulating rear plug 3, and the first protrusions 35 abutting forward against the rear end face of the base 121.

[0041] Furthermore, the insulating rear plug 3 also has a plurality of upwardly protruding second protrusions 36, the plurality of second protrusions 36 being arranged at the rear of the insulating rear plug 3, and a second protrusion 36 being provided between adjacent inclined segments 204 of the upper row of conductive terminals 2a.

[0042] The insulating back plug 3 has a first abutting portion 37 and a second abutting portion 38 that protrude downwards. The first abutting portion 37 abuts downwards against the first terminal 21 and the second terminal 22, and the second abutting portion 38 abuts downwards against the third terminal 23.

[0043] The first abutting part 37 and the second abutting part 38 are offset in the front-back direction, and the second abutting part 38 is located in front of the first abutting part 37 in the front-back direction.

[0044] The electrical connector 100 of this utility model ensures the accuracy and reliability of the positioning reference by inserting the front protrusion of the insulating rear plug 3 into the limiting groove 1212. By pressing down on the lower row of conductive terminals 2b and pushing up on the upper row of conductive terminals 2a, the key parts of the upper and lower rows of conductive terminals 2a and 2b are rigidly constrained at the same time. This maximizes the control of the positional accuracy of the two rows of welding sections 203 from the source, ensuring their consistency in the height direction, thereby improving the welding yield and efficiency, and ensuring the stability and mechanical reliability of the long-term electrical connection of the electrical connector.

[0045] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. An electrical connector comprising an insulating body, conductive terminals fixed to the insulating body, and an insulating back plug, the insulating body having a longitudinally elongated main body portion, the main body portion including a base, a top wall and a bottom wall opposite to each other on both sides of the base in the height direction, the conductive terminals including an upper row of conductive terminals mounted on the top wall and a lower row of conductive terminals mounted on the bottom wall, the soldered sections of the upper row of conductive terminals being arranged in one row along the longitudinal direction, and the soldered sections of the lower row of conductive terminals being arranged in another row along the longitudinal direction, characterized in that: The base has a limiting groove formed by a recess from its rear surface forward, and the insulating rear plug has a forward-protruding front portion that is inserted into the limiting groove from rear to front. The insulating rear plug abuts upward against the inclined section of the upper row of conductive terminals and abuts downward against the welding section of the lower row of conductive terminals.

2. The electrical connector as described in claim 1, characterized in that: The lower row of conductive terminals includes a first terminal, a second terminal, and a third terminal arranged in the longitudinal direction. The first terminal and the second terminal are disposed on both sides of the third terminal in the longitudinal direction, and the protrusion is located at the corresponding position of the third terminal in the longitudinal direction.

3. The electrical connector as described in claim 2, characterized in that: Each of the conductive terminals includes a retaining section fixed within the insulating body, a resilient contact section located in front of the retaining section, and a welding section located behind the retaining section. The upper row of conductive terminals also has an inclined section connecting the retaining section and the welding section.

4. The electrical connector as described in claim 2, characterized in that: The depth of the forward recess of the limiting groove is greater than twice the protrusion length of the forward protrusion in the front-back direction.

5. The electrical connector as described in claim 2, characterized in that: The insulating rear plug has a plurality of first protrusions that protrude upwards, the plurality of first protrusions being arranged at the front of the insulating rear plug, and the first protrusions abutting forward against the rear end face of the base.

6. The electrical connector as described in claim 5, characterized in that: The insulating rear plug also has a plurality of upwardly protruding second protrusions, which are arranged at the rear of the insulating rear plug, and a second protrusion is provided between adjacent inclined sections of the upper row of conductive terminals.

7. The electrical connector as claimed in claim 3, characterized in that: The thickness of the welded section of the first terminal and the second terminal in the height direction is greater than the thickness of the third terminal in the height direction. The insulating plug has a first abutting portion and a second abutting portion that protrude downwards. The first abutting portion abuts downwards against the first terminal and the second terminal, and the second abutting portion abuts downwards against the third terminal.

8. The electrical connector as claimed in claim 7, characterized in that: The first abutting part and the second abutting part are offset in the front-back direction, and the second abutting part is located in front of the first abutting part in the front-back direction.

9. The electrical connector as claimed in claim 8, characterized in that: The lower row of conductive terminals also has a connecting section that connects the retaining section and the welding section. The connecting section includes a first connecting portion extending from the retaining section toward the inclined section, a horizontal portion extending rearward from the first connecting portion, and a second connecting portion extending downward at the rear end of the horizontal portion. The contact sections of the third terminal are arranged above the contact sections of the first and second terminals.

10. The electrical connector as claimed in claim 1, characterized in that: The insulating body also has a pair of mounting portions extending rearward from the main body portion. The pair of mounting portions are disposed opposite to each other on both sides of the main body portion in the longitudinal direction. Each mounting portion is provided with a guide groove extending in the front-rear direction and a snap-fit ​​groove that intersects and communicates with the guide groove. The insulating rear plug also has a pair of guide rails located on both sides of the front protrusion and a snap-fit ​​portion protruding outside the guide rails. The guide rails are inserted into the guide grooves and slide therein until the snap-fit ​​portion snaps into the snap-fit ​​groove.

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