Electric connector

Abstract

The utility model discloses an electric connector, which comprises an insulating body extending along the lengthwise direction, an accommodating space is concavely arranged on the insulating body, at least two first plastic blocks jointly wrap and fix a row of first terminals through one-time injection molding, and a spacing area is arranged between two adjacent first plastic blocks along the lengthwise direction. The shielding sheet is concavely provided with a plurality of notches along the front-back direction, at least one notch is opposite to the spacing area along the up-down direction, the shielding sheet is fixedly arranged on the at least two first plastic blocks and crosses the spacing area along the lengthwise direction, and the two first plastic blocks fixedly provided with the shielding sheet are assembled in the accommodating space along the front-back direction. The plurality of first material connecting parts of the row of first terminals are exposed out of the insulating body and are aligned along the lengthwise direction, thereby preventing deformation and warping caused by overlong length of the first plastic block, reducing internal stress of the shielding sheet, preventing the shielding sheet from rebounding to drive deformation of the first plastic block, and prolonging service life of the first plastic block. Therefore, the plurality of first welding parts of the row of first terminals are ensured to have good coplanarity.

Description

[Technical Field]

[0001] This utility model relates to an electrical connector, and more particularly to an electrical connector with good coplanarity of the terminal solder joints. [Background Technology]

[0002] An existing SFF electrical connector includes an insulating body extending along the longitudinal direction and two rows of conductive terminals fixed to the insulating body. The insulating body has a forward-extending mating portion. Both rows of conductive terminals have contact portions extending to the mating portion and horizontal solder portions exposed on the insulating body. The two rows of conductive terminals are arranged along the longitudinal direction of the insulating body and are located on the upper and lower surfaces of the mating portion, respectively. The horizontal solder portions of multiple conductive terminals in the same row are aligned along the longitudinal direction and are coplanar.

[0003] To assemble and fix two rows of conductive terminals to the insulating body, the existing technology often involves injection molding multiple conductive terminals in the same row into a longitudinally elongated plastic block in one step, and then inserting the longitudinally elongated plastic block forward into the insulating body. However, the single plastic block obtained by this method extends continuously in the longitudinal direction. Its excessive length in the longitudinal direction causes the plastic block to warp and deform due to the high temperature when the conductive terminals in the same row are soldered to the circuit board. This causes multiple horizontal solder joints of the conductive terminals in the same row to be stretched and deformed by the plastic block, resulting in poor alignment and making it impossible to ensure that the multiple horizontal solder joints of the conductive terminals in the same row are in the same plane. Furthermore, when a shielding plate that extends continuously in the longitudinal direction is further provided on the plastic block to shield multiple conductive terminals, the plastic block softens at high temperatures, making the rigidity of the plastic block weaker. The longitudinally continuous shielding plate has high connection strength and high internal stress. The shielding plate rebounds at high temperatures, causing the plastic to arch and warp, which in turn leads to even worse alignment of the conductive terminals in the same row.

[0004] Therefore, it is necessary to design an improved electrical connector to solve the above-mentioned technical problems. [Utility Model Content]

[0005] To address the problems in the background technology, the purpose of this utility model is to provide an electrical connector in which multiple first plastic blocks separated along the longitudinal direction cover a row of first terminals, preventing the first plastic blocks from being too long and causing deformation and warping, and opening notches along the front and rear directions on the shielding sheet to reduce the internal stress of the shielding sheet and prevent the shielding sheet from rebounding and causing the first plastic blocks to deform, thereby ensuring that the multiple first welding parts of a row of first terminals have good coplanarity.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an electrical connector includes an insulating body extending along a longitudinal direction, the insulating body having at least one receiving space recessed along a front-back direction perpendicular to the longitudinal direction, the receiving space extending along the longitudinal direction, and the insulating body having multiple terminal receiving slots connected to the receiving space along the front-back direction; at least one row of first terminals arranged along the longitudinal direction, at least two first plastic blocks being injection molded together to cover and fix the row of first terminals, a gap area being formed between adjacent first plastic blocks along the longitudinal direction, each first terminal including a first embedded part embedded in the first plastic block, from the first A first contact portion extends along the front-back direction from one side of the first embedded portion, and a first welding portion extends along the front-back direction from the other side of the first embedded portion. The side of the first terminal away from the first contact portion has a first connecting portion exposed in the first plastic block. A shielding sheet is fixed on at least two first plastic blocks and spans the interval area along the longitudinal direction. The shielding sheet has multiple notches recessed along the front-back direction, and at least one notch is directly opposite the interval area along the vertical direction. The two first plastic blocks on which the shielding sheet is fixed are assembled together in the receiving space along the front-back direction. The multiple first contact portions are respectively received in multiple terminal receiving slots. The multiple first connecting portions are exposed outside the insulating body and aligned along the longitudinal direction.

[0007] Furthermore, the depth of each notch recessed in the front-back direction is greater than half the length of the shielding sheet extending in the front-back direction.

[0008] Furthermore, the first row of terminals includes multiple signal terminals, multiple ground terminals, and at least one power terminal. The shielding sheet extends in the front-to-back direction and covers multiple signal terminals. At least one notch is aligned with the power terminal in the up-down direction. The shielding sheet has multiple abutting portions that abut against multiple ground terminals respectively.

[0009] Furthermore, the shielding sheet covers multiple first contact portions and multiple first embedded portions of multiple signal terminals. The first plastic block includes a base portion covering multiple first embedded portions. Multiple extension portions extend from the base portion corresponding to multiple first contact portions of multiple signal terminals in a front-rear direction. The multiple extension portions cover the side of the first contact portion of the multiple signal terminals that is close to the shielding sheet, and the side of the multiple first contact portions that is away from the shielding sheet is exposed on the outer surface of the insulating body.

[0010] Furthermore, the rear end of the self-shielding sheet has two positioning feet that are fixed to the two first plastic blocks respectively. When viewed along the longitudinal direction, the positioning feet overlap with the rear section of the interval area.

[0011] Furthermore, a row of first terminals has multiple grounding terminals. Each of the two first plastic blocks has a positioning groove recessed on its upper surface. Two positioning feet are bent downward and inserted into the two positioning grooves respectively. Each first plastic block has multiple windows recessed downward for each of the multiple grounding terminals. The first embedded part of the grounding terminal is exposed in the window. The shielding sheet has multiple openings recessed for each grounding terminal. Multiple abutting parts extend downward from the side edges of the multiple openings. The multiple abutting parts are aligned in the front-back direction to abut against the first contact part of each grounding terminal and the first embedded part exposed in the window respectively.

[0012] Furthermore, the containment space is provided with at least two reinforcing ribs arranged at intervals along the longitudinal direction, corresponding to the two notches of the shielding sheet. The top and bottom of each reinforcing rib are respectively connected to the top wall and bottom wall of the containment space. A first adhesive reduction groove is recessed from the front end of the first plastic block to the rear corresponding to one of the notches. One reinforcing rib enters the interval area, and the other reinforcing rib enters the first adhesive reduction groove.

[0013] Furthermore, the first connecting part is the end face of the first welding part, and the width of the interval area along the longitudinal direction is smaller than the distance between two adjacent first welding parts.

[0014] Furthermore, the insulating body has two receiving spaces stacked in the vertical direction and a mating portion located in front of the two receiving spaces. Multiple first plastic blocks are assembled into the lower receiving space so that a row of first terminals are arranged on the lower surface of the mating portion. Multiple first contact portions of the row of first terminals are at the same height. The electrical connector also includes a row of second terminals and multiple second plastic blocks that are injection molded to cover the row of second terminals. Multiple second plastic blocks are spaced apart in the longitudinal direction and assembled together into the upper receiving space so that a row of second terminals is arranged on the upper surface of the mating portion. The second terminal includes a second embedded portion embedded in the second plastic base, a second contact portion extending from one side of the second embedded portion in the front-back direction, and a second welding portion extending from the other side of the second embedded portion in the front-back direction. The side of the second terminal away from the second contact portion has a second connecting portion exposed by the second plastic block. Multiple second contact portions of the row of second terminals are at different heights, multiple second welding portions are coplanar, and multiple second connecting portions are aligned in the longitudinal direction.

[0015] Furthermore, at least one second plastic block includes a first covering portion having a first thickness along the vertical direction and a second covering portion having a second thickness. The first covering portion and the second covering portion are connected along the front-back direction. The first thickness is greater than the second thickness. The length of the bottom wall of the upper receiving space extending along the front-back direction is greater than the length of its top wall extending along the front-back direction. The top surface of the first covering portion along the vertical direction is directly opposite to the top wall of the upper receiving space. At least one second snap-fit ​​portion and a plurality of interference protrusions are protruding from the upper surface of the first covering portion. The top wall of the upper receiving space is provided with a slot. The second snap-fit ​​portion is correspondingly snapped into the slot to restrict the second plastic block from exiting the insulating body along the front-back direction. The plurality of interference protrusions are interference-fitted with the top wall of the upper receiving space.

[0016] Compared with the prior art, this utility model has the following beneficial effects: Multiple first plastic blocks are injection molded in one step to cover a row of first terminals, avoiding the overall warping and deformation problem caused by excessively long plastic blocks in one injection molding as in the prior art. This helps reduce the deformation of each first plastic block during high-temperature welding. Furthermore, multiple first connecting parts of the multiple first terminals are exposed outside the insulating body and aligned along the longitudinal direction, facilitating the connection of multiple first connecting parts through the same first strip during assembly. This ensures the coplanarity of the assembled multiple first welding parts of a row of terminals. The shielding sheet is fixed to two adjacent first plastic blocks and spans the gap between them. The shielding sheet has multiple recesses to reduce the connection strength of the shielding sheet and to give it better elasticity, reducing... This design reduces the internal stress of the shielding sheet, preventing the shielding sheet from rebounding and warping the first plastic block under excessive internal stress during high-temperature welding. Furthermore, at least one notch aligns with the gap area, effectively preventing the shielding sheet from arching in the middle and causing deformation of the first plastic block. It also provides space for the thermal expansion of the two first plastic blocks, effectively controlling their deformation. This further ensures good coplanarity and alignment of the multiple first welded parts. During assembly, the multiple first plastic blocks are connected together by the same first material strip and shielding sheet, allowing for one-time assembly into the receiving space. This avoids assembly errors caused by assembling multiple first plastic blocks separately, thus ensuring the alignment of the multiple first welded parts. It also simplifies the assembly process and reduces manufacturing costs. [Attached Image Description]

[0017] Figure 1 This is an exploded perspective view of the electrical connector of this utility model;

[0018] Figure 2 This is a three-dimensional assembly diagram of the electrical connector of this utility model;

[0019] Figure 3 for Figure 2 Schematic cross-sectional view along the AA direction;

[0020] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0021] Figure 5 The rear view of the insulating body is omitted for the electrical connector of this utility model;

[0022] Figure 6 This is a top view of the first terminal, the first plastic block, and the shielding sheet assembled in this utility model;

[0023] Figure 7 This is a perspective sectional view of the electrical connector in this utility model;

[0024] Figure 8 for Figure 7 Enlarged schematic diagram of region D circled in the middle;

[0025] Figure 9 for Figure 7 Enlarged view of region E circled in the middle;

[0026] Figure 10 This is a schematic diagram of a semi-finished product of the first plastic block of this utility model, which is formed by injection molding in one step and covers a row of first terminals;

[0027] Figure 11 This is a schematic diagram of a semi-finished product of the present invention, in which a second plastic block is formed in one injection molding process and covers a row of second terminals. Explanation of reference numerals in the accompanying drawings for specific embodiments:

[0028]

Detailed Implementation Methods

[0029] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figures 1 to 11As shown, this is the electrical connector 100 of the present invention. The electrical connector 100 includes an insulating body 1 extending along the longitudinal direction. The insulating body 1 includes two recessed upper and lower receiving spaces 11 from back to front and a mating portion 12 located in front of the two receiving spaces 11. A row of first terminals 2 and a row of second terminals 3 arranged along the longitudinal direction are respectively located on the upper and lower sides of the mating portion 12. Two first plastic blocks 4 are injection molded to cover a row of first terminals 2. A shielding sheet 6 is fixed to the two first plastic blocks 4 and spans a gap area Q between the two first plastic blocks 4. The two first plastic blocks 4 with the shielding sheet 6 are connected to a first material strip L1 and assembled together to the receiving space 11 located on the lower side. Three second plastic blocks 5 are injection molded to cover a row of second terminals 3. A grounding piece 7 is fixed to one of the second plastic blocks 5. The length of the grounding piece 7 is less than the length of the shielding piece 6. The three second plastic blocks 5 are connected to a second material strip L2 and assembled together to the receiving space 11 on the upper side. In this embodiment, the front-to-back direction is the X-axis direction, the longitudinal direction of the insulating body 1 is the Y-axis direction, and the up-down direction is the Z-axis direction.

[0031] like Figures 1 to 3 As shown, the mating portion 12 of the insulating body 1 is tongue-shaped. Both the upper and lower surfaces of the mating portion 12 are recessed with multiple terminal receiving grooves 121. The multiple terminal receiving grooves 121 located on the lower surface of the mating portion 12 correspond to receiving multiple first contact portions 21 of multiple first terminals 2. The multiple terminal receiving grooves 121 located on the upper surface of the mating portion 12 correspond to receiving multiple second contact portions 31 of multiple second terminals 3. The mating portion 12 has a protrusion that protrudes upward relative to other parts of the mating portion 12. The multiple terminal receiving grooves 121 located on the upper surface of the protrusion are higher than the other multiple terminal receiving grooves 121 on the upper side of the mating portion 12. Each terminal receiving groove 121 extends in the front-back direction and connects to the receiving space 11 located behind it.

[0032] like Figure 1 As shown, two receiving spaces 11 are stacked vertically along the vertical direction. Each receiving space 11 extends along the longitudinal direction of the insulating body 1. Each receiving space 11 has multiple reinforcing ribs 111 arranged at intervals along the longitudinal direction. The top and bottom of each reinforcing rib 111 are respectively connected to the top wall and bottom wall of the receiving space 11, so that the multiple reinforcing ribs 111 are vertically supported between the top wall and bottom wall of the receiving space 11. This prevents the middle of the plastic from collapsing and deforming at high temperatures when the length of the receiving space 11 in the longitudinal direction is too long, thereby strengthening the structural strength of the insulating body 1. In this embodiment, as... Figure 2As shown, in the upper receiving space 11, a portion of the multiple reinforcing ribs 111 extend into the gap area Q between two adjacent second plastic blocks 5, and another portion of the reinforcing ribs 111 extend into the multiple second reducing grooves 513 of the second plastic blocks 5 (not shown). The lower receiving space 11, however, only has two reinforcing ribs 111. Figure 7 As shown, one reinforcing rib 111 extends into the gap area Q between the two first plastic blocks 4, and another reinforcing rib 111 extends into a first reducing groove 413 of the first plastic block 4.

[0033] The bottom wall of the lower receiving space 11 is provided with multiple slots 112. These slots 112 cooperate with multiple first engaging portions 414 protruding from the bottom of the first plastic block 4 to limit the position of the first plastic block 4 (not shown). The top wall of the upper receiving space 11 is provided with multiple slots 112, such as... Figure 4 The slot 112 shown is used to cooperate with the multiple second snap-fit ​​parts 511 protruding from the top of the multiple second plastic blocks 5 to limit the multiple second plastic blocks 5.

[0034] like Figure 3 and Figure 10 As shown, each first terminal 2 includes a first embedded portion 22 embedded in a first plastic block 4, a first contact portion 21 extending from one side of the first embedded portion 22 in a front-back direction, and a first welding portion 23 extending from the other side of the first embedded portion 22 in a front-back direction. The side of the first terminal 2 away from the first contact portion 21 has a first connecting portion 24 exposed in the first plastic block 4. Multiple first contact portions 21 of a row of first terminals 2 are located at the same height, and multiple first welding portions 23 are coplanarly arranged. In the manufacturing process of a row of first terminals 2, the head of the row of first terminals 2 is connected to the same front feed strip, and the tail of the row of first terminals 2 is connected to the same first feed strip L1. (Refer to...) Figure 10 The two first plastic blocks 4 shown in the figure cover a row of first terminals 2 semi-finished products. By positioning the front strip and the first strip L1 of the row of first terminals 2, the alignment of multiple first contact parts 21 and multiple first weld parts 23 is maintained in the injection molding process. Multiple first connecting parts 24 are formed by cutting the first strip L1. In this embodiment, the first connecting part 24 is the end face of the first weld part 23.

[0035] like Figure 6 As shown, a row of first terminals 2 includes multiple signal terminals S, multiple ground terminals G, and multiple power terminals P. The multiple signal terminals S are used to transmit high-speed signals, and see [reference needed]. Figure 5In the rear view, the dashed line represents the outer contour of the first plastic block 4 blocked by the second terminal 3. The two first plastic blocks 4 are injection molded in one step and have a gap Q between them along the longitudinal direction. The width of the gap Q along the longitudinal direction is smaller than the distance between the two adjacent first welding parts 23. The two spaced-apart first plastic blocks 4 are used to segmentally cover a row of first terminals 2 to prevent the warping and deformation of the first plastic blocks 4 that are too long in one molding. Each of the upper surfaces of the two first plastic blocks 4 has a downwardly recessed positioning groove 412. The rear end of the shielding sheet 6 extends downward with two... Two positioning feet 63 are respectively inserted into two positioning slots 412 to fix the shielding sheet 6 on the upper side of the two first plastic blocks 4, thereby enhancing the anti-interference capability of the signal terminal S when transmitting signals. Viewed longitudinally, the two positioning feet 63 overlap with the rear section of the gap area Q, so that even if there is a gap area Q between the two first plastic blocks 4, the two positioning feet 63 fix the two first plastic blocks 4, thus assembling the shielding sheet 6 and the two first plastic blocks 4 together into the insulating body 1 during assembly, ensuring the correct positioning of the row of first terminals 2. In this embodiment, only two first plastic blocks 4 are provided to cover the row of first terminals 2, and the gap area Q is approximately located near the middle position of the longitudinal length of the row of first terminals 2. However, in other embodiments, more longitudinally spaced first plastic blocks 4 can be provided depending on the number of first terminals 2 and the longitudinal length of the arrangement. This invention does not limit the number of first plastic blocks 4.

[0036] like Figure 1 and Figures 6 to 10As shown, the shielding plate 6 extends longitudinally and crosses the interval Q. Multiple notches 61 are recessed from the front end of the shielding plate 6 to the rear. The multiple notches 61 reduce the overall connection strength of the shielding plate 6 and reduce the internal stress of the shielding plate 6, so that the shielding plate 6 has better elasticity. This prevents the plastic from softening during high-temperature welding and causing the shielding plate 6 to rebound under the action of internal stress, thus causing the first plastic block 4 to deform and warp. In addition, one of the notches 61 is directly opposite the interval Q in the vertical direction, which effectively prevents the middle part of the shielding plate 6 from arching and causing the first plastic block 4 to deform. At the same time, it also provides space for the thermal expansion of the two first plastic blocks 4, so that the degree of deformation of the first plastic block 4 is effectively controlled. This further ensures the coplanarity and alignment of the multiple first welding parts 23. The position of the multiple notches 61 recessed in the shielding plate 6 is directly opposite the multiple power terminals P in a row of first terminals 2, so that the shielding plate 6 can still have a good shielding effect on the signal terminal S even with the notches 61. Each notch 61 is recessed to a depth greater than half the length of the shielding sheet 6 extending in the front-back direction. This makes the portion of the shielding sheet 6 separated by the notch 61 relatively more independent, reducing its connection strength and increasing its elasticity, thereby preventing the shielding sheet 6 from rebounding and tearing the plastic at high temperatures. The first plastic block 4 is recessed from front to back with multiple first adhesive reduction grooves 413, one of which corresponds to one of the notches 61 in the shielding sheet 6 in the vertical direction. When two first plastic blocks 4 are housed in the lower receiving space 11, one of the reinforcing ribs 111 in the lower receiving space 11 is housed in the spacing area Q, and the other reinforcing rib 111 extends into the first adhesive reduction groove 413 corresponding to the notch 61. In this embodiment, a row of first terminals 2 has multiple power terminals P. In other embodiments, only one power terminal P may be provided, depending on the transmission specifications of the electrical connector 100, and is not limited here. Aligning the notch 61 of the shielding sheet with the location of the power terminal P reduces the impact on shielding performance.

[0037] like Figure 1 and Figure 6 As shown, the front end of the shielding sheet 6 extends forward beyond the front end of the first plastic block 4 and covers the first contact portion 21 and the first embedded portion 22 of the multiple signal terminals S. The first plastic block 4 includes a base 41 covering the multiple first embedded portions 22 and multiple extension portions 42 extending forward from the base 41 corresponding to the multiple signal terminals S. The multiple extension portions 42 respectively correspond to the side of the first contact portion 21 of the multiple signal terminals S near the shielding sheet 6, while the side of the first contact portion 21 of the multiple signal terminals S away from the shielding sheet 6 is exposed on the lower surface of the mating portion 12, so that the extension portions 42 block the first contact portion 21 of the signal terminals S and the shielding sheet 6 in the vertical direction, effectively preventing the signal terminals S from accidentally short-circuiting with the shielding sheet 6.

[0038] like Figure 1 , Figure 3 and Figure 6 As shown, the shielding sheet 6 also has multiple recesses 62 corresponding to multiple grounding terminals G. An abutment portion 621 extends from the side edge of the opening 62 and abuts against the grounding terminal G. The shielding sheet 6 has three abutment portions 621 for each grounding terminal G. The three abutment portions 621 are aligned in the front-back direction to abut against the first contact portion 21 and the first embedded portion 22 of the grounding terminal G. Figure 3 The multiple abutment portions 621 shown abut against the side of the first contact portion 21 of the grounding terminal G near the shielding sheet 6. The second plastic block 5 has multiple recessed windows 411 corresponding to the multiple first embedded portions 22 of the multiple grounding terminals G, so that the first embedded portions 22 of the grounding terminals G are exposed within the windows 411. The multiple abutment portions 621 can extend into the multiple windows 411 to abut against the multiple first embedded portions 22 of the multiple grounding terminals G. Therefore, the multiple grounding terminals G are short-circuited by the shielding sheet 6, improving grounding performance, reducing ground mode resonance interference to the signal, and improving the SI performance of the electrical connector 100. In this embodiment, the abutment portions 621 are spot-welded to the grounding terminals G, making the connection between the shielding sheet 6 and the grounding terminals G more secure.

[0039] like Figure 3 and Figure 11 As shown, each second terminal 3 includes a second embedded portion 32 embedded in the second plastic block 5, a second contact portion 31 extending from one side of the second embedded portion 32 in a front-back direction, and a second welding portion 33 extending from the other side of the second embedded portion 32 in a front-back direction. The side of the second terminal 3 away from the second contact portion 31 has a second connecting portion 34 exposed in the second plastic block 5. The multiple second contact portions 31 of a row of second terminals 3 are located at different heights. The row of second terminals 3 is divided into a first part, a second part, and a third part in the longitudinal direction according to the different heights of the second contact portions 31. The multiple second contact portions 31 of the first part and the multiple second contact portions 31 of the third part are located at the same height. The multiple second contact portions 31 of the second part are higher than the multiple second contact portions 31 of the first part and the third part. The multiple second contact portions 31 of the second part are correspondingly received in the multiple terminal receiving grooves 121 on the upper side of the protrusion. The multiple second welding portions 33 of a row of second terminals 3 are arranged coplanarly. In the manufacturing process of a row of second terminals 3, the heads of the row of second terminals 3 are connected to different front feed strips, while the tails of the row of second terminals 3 are connected to the same second feed strip L2. (Refer to...) Figure 11 The three second plastic blocks 5 shown in the figure cover a row of second terminals 3 semi-finished products. By positioning multiple front strips and second strips L2 of a row of second terminals 3, the alignment of multiple second contact portions 31 and multiple second weld portions 33 is maintained in the injection molding process. Multiple second connecting portions 34 are formed by cutting their second strips L2. The second connecting portions 34 are the end faces of the second weld portions 33.

[0040] like Figure 1 and Figure 5 As shown, three second plastic blocks 5 are arranged sequentially along the longitudinal direction, with a gap Q between adjacent second plastic blocks 5. Compared to the single plastic block that is too long and molded in one go in the prior art, the segmented multiple second plastic blocks 5 effectively prevent plastic deformation and ensure the correct positioning of a row of second terminals 3. The second plastic blocks 5 also have multiple second reducing grooves 513 recessed from their front end to the rear. The multiple second reducing grooves 513 are spaced apart along the longitudinal direction to prevent the plastic blocks from shrinking and deforming in the middle when they are too long. When the multiple second plastic blocks 5 are inserted into the receiving space 11 on the upper side, the multiple reinforcing ribs 111 inside are correspondingly received into the multiple second reducing grooves 513 and the gap Q between adjacent second plastic blocks 5. On the basis of strengthening the structural strength of the insulating body 1, the multiple second plastic blocks 5 can be further accurately positioned to prevent the multiple second plastic blocks 5 from shifting in the longitudinal direction, thus ensuring the accuracy of the multiple second welding parts 33 of a row of second terminals 3 during welding. In this embodiment, the third part of a row of second terminals 3 includes a high-speed signal terminal S and a grounding terminal G. The top side of the second plastic block 5 covering the third part is also provided with a grounding component 7, which is electrically connected to the multiple grounding terminals G in the second terminals 3. In other embodiments, other parts of a row of second terminals 3 may also include a high-speed signal terminal S and a grounding terminal G, and a shielding sheet 6 or a grounding component 7 is provided on the second plastic block 5. The shielding sheet 6 or the grounding component 7 can be selectively provided according to the function and arrangement of the row of second terminals 3.

[0041] like Figure 5 As shown, the bottom surfaces of the three second plastic blocks 5 are at the same height, while the top surfaces of the two second plastic blocks 5 covering the first and third parts of a row of second terminals 3 are lower than the top surface of the second plastic block 5 covering the second part. This means that the three second plastic blocks 5, molded in one injection molding process in this invention, can be formed to different thicknesses according to the different terminals, reducing plastic usage, further saving costs, and avoiding plastic waste and structural redundancy. (Refer to...) Figure 4 and Figure 11One of the second plastic blocks 5 (i.e., the second plastic block 5 covering the first part of a row of second terminals 3) is stepped, including a first covering part 51 with a first thickness in the vertical direction and a second covering part 52 with a second thickness. The first covering part 51 and the second covering part 52 are connected front to back, and the first thickness is greater than the second thickness. The second covering part 52 is exposed on the outside. The top surface of the first covering part 51 is directly opposite the top wall of the receiving space 11, and a second snap-fit ​​part 511 and a plurality of interference protrusions 512 are provided on the top surface of the first covering part 51. The second snap-fit ​​part 511 is correspondingly snapped into the slot 112 of the top wall of the receiving space 11, preventing the second plastic block 5 from exiting the insulating body 1. The plurality of interference protrusions 512 further interfere with the top wall of the receiving space 11 and restrict the second plastic block 5 from shaking in the vertical direction, so that the second plastic block 5 is well held in the insulating body 1, further ensuring the accuracy of the position of the plurality of second welding parts 33 of a row of second terminals 3. Therefore, while ensuring the structural stability of the second plastic block 5, the second covering portion 52 can be made thinner, which can prevent the overall plastic from deforming due to excessive thickness, optimize the overall thickness distribution of the second plastic block 5, reduce the amount of plastic used, save manufacturing costs, and the thinner plastic also facilitates faster heat dissipation. In this embodiment, the second plastic block 5 covering the second part of the row of second terminals 3 is also stepped and similarly has a second snap-fit ​​portion 511 and an interference protrusion 512 protruding on its top. The second plastic block 5 covering the third part of the first row of second terminals 3 is limited by the grounding member 7 cooperating with the slot 112 (not shown).

[0042] The assembly process of electrical connector 100 is roughly as follows: Figure 10 The two first plastic blocks 4 of the semi-finished product shown are fixed with shielding plates 6. Then, a row of the front material strip of the first terminal 2 is cut off, so that the two first plastic blocks 4 are connected together via the first material strip L1 of the first terminal 2 and the shielding plate 6. Then, they are assembled into the lower receiving space 11 in one go by the assembly jig. Then, a row of the first material strip L1 of the first terminal 2 is cut off, and in Figure 11 A grounding plate is fixed on one of the second plastic blocks 5 of the semi-finished product shown. Then, a row of the front material strip of the second terminal 3 is cut off, so that multiple second plastic blocks 5 are connected together via the second material strip L2 of the second terminal 3. Then, they are assembled into the upper receiving space 11 in one go by the assembly jig. Then, a row of the second material strip L2 of the second terminal 3 is cut off. Therefore, it is not necessary to assemble the two separate first plastic blocks 4 or multiple second plastic blocks 5 separately multiple times, which simplifies the assembly steps and avoids the assembly error caused by multiple separate assembly. In addition, multiple first welding parts 23 and multiple second welding parts 33 are held by the first material strip L1 and the second material strip L2 they are connected to during the assembly process and have good coplanarity.

[0043] In summary, the electrical connector 100 of this utility model has the following beneficial effects:

[0044] (1) Multiple first plastic blocks 4 are injection molded in one step to cover a row of first terminals 2, avoiding the overall warping and deformation problem caused by excessively long plastic blocks in the prior art. This is beneficial to reduce the deformation of each first plastic block 4 during high-temperature welding. In addition, multiple first connecting parts 24 of multiple first terminals 2 are exposed outside the insulating body 1 and aligned along the longitudinal direction, so that multiple first connecting parts 24 can be connected by the same first strip L1 during the assembly process. This ensures the coplanarity of multiple first welding parts 23 of a row of terminals after assembly. The shielding plate 6 is fixed to two adjacent first plastic blocks 4 and spans the gap area Q between the two first plastic blocks 4. The shielding plate 6 is recessed with multiple notches 61 to reduce the connection strength of the shielding plate 6 and to make the shielding plate 6 have better elasticity, thereby reducing the internal stress of the shielding plate 6. This design avoids the problem of the shielding sheet 6 rebounding and pulling the first plastic block 4 under excessive internal stress during high-temperature welding, causing it to warp and deform. At least one notch 61 is directly opposite the interval area Q, effectively preventing the shielding sheet 6 from arching in the middle and causing the first plastic block 4 to deform. It also provides space for the thermal expansion of the two first plastic blocks 4, effectively controlling the deformation of the first plastic block 4. This further ensures that the multiple first welding parts 23 have good coplanarity and alignment. In addition, the multiple first plastic blocks 4 are connected together by the same first material strip L1 and shielding sheet 6 during the assembly process, and can be assembled into the receiving space 11 at one time. This avoids the assembly errors caused by assembling multiple first plastic blocks 4 separately, thereby ensuring the alignment of the multiple first welding parts 23, simplifying the assembly steps and reducing manufacturing costs.

[0045] (2) The depth of each notch 61 in the front-back direction is greater than half the length of the shielding sheet 6 in the front-back direction, so that the part of the shielding sheet 6 separated by the notch 61 is relatively more independent, thereby reducing the connection strength, enhancing its elasticity, reducing internal stress, and preventing the shielding sheet 6 from rebounding and pulling the plastic at high temperature.

[0046] (3) The shielding sheet 6 has multiple notches 61 positioned directly opposite to multiple power terminals P in a row of first terminals 2, so that the shielding sheet 6 can still provide good shielding for the signal terminals S even with the notches 61.

[0047] (4) Multiple reinforcing ribs 111 are vertically supported between the top and bottom walls of the receiving space 11 to prevent the plastic middle part from collapsing and deforming at high temperature when the length of the receiving space 11 extends too long in the longitudinal direction, thereby strengthening the structural strength of the insulating body 1. One of the reinforcing ribs 111 is housed in the gap area Q between the two first plastic blocks 4, and another reinforcing rib 111 extends into the plastic reduction groove on one of the first plastic blocks 4 to position the two first plastic blocks 4, further increasing the overall structural strength of the electrical connector 100.

[0048] (5) Multiple second contact portions 31 of a row of second terminals 3 are located at different heights. Multiple second plastic blocks 5 are injection molded to cover a row of second terminals 3 in one injection molding process. Even if the heights of multiple second contact portions 31 are different, multiple second plastic blocks 5 can be formed simultaneously using one injection mold. Therefore, it is not necessary to use multiple injection molds to form the second plastic blocks 5 for the second terminals 3 at different heights, which reduces the mold development cost and thus reduces the production cost. In addition, multiple second welding portions 33 are arranged in the same plane, and multiple second connecting portions 34 are aligned along the longitudinal direction to connect the same second material strip L2. This allows multiple second plastic blocks 5 to be assembled at one time through the material strip during the assembly process, thereby ensuring the coplanarity and alignment of multiple second welding portions 33.

[0049] (6) The two positioning feet 63 overlap with the rear section of the gap area Q, so that even if there is a gap area Q between the two first plastic blocks 4, the two first plastic blocks 4 are fixed by the two positioning feet 63, thereby assembling the shielding sheet 6 and the two first plastic blocks 4 into the insulating body 1 during the assembly process, ensuring the correct position of a row of second terminals 3.

[0050] The above detailed description is only a description of the preferred embodiment of this utility model and is not intended to limit the patent scope of this utility model. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. An electrical connector, characterized by, The application relates to a terminal assembly, comprising: an insulating body extending along a longitudinal direction, the insulating body is concave along a front-rear direction perpendicular to the longitudinal direction and is provided with at least one receiving space extending along the longitudinal direction, the insulating body is provided with a plurality of terminal receiving grooves along the front-rear direction and in communication with the receiving space; at least one row of first terminals arranged along the longitudinal direction, at least two first plastic blocks collectively cover and fix one row of first terminals through one-time injection molding, and each first plastic block has a spacing area between two adjacent first plastic blocks along the longitudinal direction, each first terminal comprises a first embedded part embedded in the first plastic block, a first contact part extending along the front-rear direction from one side of the first embedded part, and a first welding part extending along the front-rear direction from the other side of the first embedded part, and the first terminal has a first connecting part exposed to the first plastic block on the side away from the first contact part; a shielding sheet fixed to the at least two first plastic blocks and extending across the spacing area along the longitudinal direction, the shielding sheet is concave along the front-rear direction and is provided with a plurality of notches, and at least one notch is vertically opposite to the spacing area along the up-down direction; wherein the two first plastic blocks with the shielding sheet are assembled in the receiving space along the front-rear direction, the plurality of first contact parts are respectively received in the plurality of terminal receiving grooves, and the plurality of first connecting parts are exposed outside the insulating body and aligned along the longitudinal direction.

2. The electrical connector of claim 1, wherein: The depth of each notch concave along the front-rear direction is greater than half the length of the shielding sheet extending along the front-rear direction.

3. The electrical connector of claim 1, wherein: The row of first terminals comprises a plurality of signal terminals, a plurality of ground terminals and at least one power terminal, the shielding sheet extends along the front-rear direction and shields the plurality of signal terminals, at least one notch is aligned with the power terminal along the up-down direction, and the shielding sheet is provided with a plurality of abutting parts respectively abutting the plurality of ground terminals.

4. The electrical connector of claim 3, wherein: The shielding sheet shields the plurality of first contact parts and the plurality of first embedded parts of the plurality of signal terminals, the first plastic block comprises a base part covering the plurality of first embedded parts, a plurality of extension parts extending along the front-rear direction from the base part corresponding to the plurality of first contact parts of the plurality of signal terminals, the plurality of extension parts cover and fix the side of the first contact part of the plurality of signal terminals close to the shielding sheet, and the side of the plurality of first contact parts away from the shielding sheet is exposed to the outer surface of the insulating body.

5. The electrical connector of claim 1, wherein: Two positioning feet extending from the rear end of the shielding sheet are respectively fixed to the two first plastic blocks, and the positioning feet overlap the rear section of the spacing area along the longitudinal direction.

6. The electrical connector of claim 5, wherein: The row of first terminals has a plurality of ground terminals, the upper surfaces of the two first plastic blocks are respectively concave and provided with positioning grooves, the two positioning feet are respectively inserted into the two positioning grooves by being downwardly bent, each first plastic block is respectively downwardly concave and provided with a plurality of windows corresponding to the plurality of ground terminals, the first embedded part of the ground terminal is exposed to the window, the shielding sheet is concave and provided with a plurality of openings corresponding to each ground terminal, a plurality of abutting parts extend downwardly from the side edges of the plurality of openings, and the plurality of abutting parts are aligned along the front-rear direction and respectively abut the first contact part of each ground terminal and the first embedded part exposed to the window.

7. The electrical connector of claim 1, wherein: The receiving space is provided with at least two reinforcing ribs arranged in the longitudinal direction and corresponding to two gaps of the shielding sheet. The top and bottom of each reinforcing rib are connected to the top wall and bottom wall of the receiving space, respectively. A first glue-reducing groove is concavely arranged behind the front end of the first plastic block corresponding to one of the gaps. One of the reinforcing ribs partially enters the spacing area, and the other reinforcing rib partially enters the first glue-reducing groove.

8. The electrical connector of claim 1, wherein: The first connecting part is the end surface of the first welding part. The width of the spacing area in the longitudinal direction is smaller than the distance between the two first welding parts adjacent to the spacing area.

9. The electrical connector of claim 1, wherein: The insulating body is provided with two receiving spaces stacked in the up-down direction and a pair of connecting parts in front of the two receiving spaces. A plurality of first plastic blocks are assembled to the lower receiving space so that a row of first terminals is arranged on the lower surface of the connecting parts. The plurality of first contact parts of the row of first terminals are at the same height. The electrical connector further includes a row of second terminals and a plurality of second plastic blocks covering the row of second terminals by one injection molding. The plurality of second plastic blocks are spaced apart in the longitudinal direction and are assembled to the upper receiving space together so that a row of second terminals is arranged on the upper surface of the connecting parts. The second terminal includes a second embedded part embedded in the second plastic block, a second contact part extending in the front-back direction from one side of the second embedded part, and a second welding part extending in the front-back direction from the other side of the second embedded part. The second terminal has a second connecting part exposed from the second plastic block on the side away from the second contact part. The plurality of second contact parts of the row of second terminals are at different heights. The plurality of second welding parts are coplanar. The plurality of second connecting parts are aligned in the longitudinal direction.

10. The electrical connector of claim 9, wherein: The at least one second plastic block includes a first covering part having a first thickness in the up-down direction and a second covering part having a second thickness. The first covering part and the second covering part are connected in the front-back direction. The first thickness is greater than the second thickness. The bottom wall of the upper receiving space extends in the front-back direction for a length greater than the length of the top wall extending in the front-back direction. The top surface of the first covering part is arranged opposite to the top wall of the upper receiving space in the up-down direction. At least one second clamping part and a plurality of interference protrusions are protruding from the upper surface of the first covering part. The top wall of the upper receiving space is provided with a clamping groove. The second clamping part is clamped in the clamping groove to limit the second plastic block from exiting the insulating body in the front-back direction. The plurality of interference protrusions are interference-fitted with the top wall of the upper receiving space.

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