An electrical connector

Abstract

The present invention discloses an electrical connector, comprising an insulating body and upper and lower rows of conductive terminals. The insulating body comprises an inserting slot and a front surface located on one side of the inserting slot, a rear surface opposite to the front surface and a mounting surface. The upper and lower walls in the inserting slot are respectively penetrated by a plurality of upper and lower terminal slots for accommodating the upper and lower rows of conductive terminals facing the mounting surface. The upper row of conductive terminals comprises a plurality of signal terminals and a plurality of grounding terminals. The electrical connector also comprises a plurality of insulating buckle blocks and shielding strips. Each insulating buckle block is fixed with a pair of signal terminals. The insulating buckle blocks are fixed on the shielding strip. Grounding terminals are assembled on both sides of each pair of signal terminals on the shielding strip. A non-contact gap is retained between the grounding terminal and the shielding strip. With such a structural design, the shielding strip can better shield the grounding terminal and improve the high-quality rate transmission of the signal terminal, thereby effectively improving the disadvantages caused by crosstalk and impedance of the high-speed differential signal connector.

Description

Technical Field

[0001] The present invention relates to the technical field of electric connectors, in particular to an electric connector for high data rate transmission (SFP). Background Art

[0002] The SFP electrical connector is an electrical connector for high data rate applications. The SFP electrical connector provided in the prior art includes an insulating body, an upper row of terminals and a lower row of terminals contained in the insulating body, wherein the upper row of terminals includes a signal terminal and a ground terminal, and ground terminals are provided on both sides of each pair of signal terminals, i.e., a GSSG grid, to form a differential signal input, and each pair of signal terminals is protected by a ground terminal to reduce crosstalk, while no measures are adopted for improving crosstalk and return loss for the ground terminal itself.

[0003] Therefore, in order to realize the electrical connector with high data rate transmission, it is necessary to shield the grounding terminal to reduce the impedance, so as to improve the high-speed data transmission of the SFP electrical connector, and it is also imperative to improve the SI performance of the SFP electrical connector.

[0004] In view of the above-mentioned limitations of the SFP electrical connector, it is necessary to propose a new high data rate (SFP) electrical connector. Summary of the invention

[0005] The object of the present invention is to overcome the deficiencies of the prior art and provide an electrical connector for a high data rate SFP.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: an electrical connector, comprising an insulating body, an upper row of conductive terminals and a lower row of conductive terminals accommodated in the insulating body, the insulating body comprising a plug-in slot and a front surface located on one side of the plug-in slot, a rear surface opposite to the front surface, and a mounting surface, the upper and lower walls in the plug-in slot are respectively penetrated by a plurality of upper terminal slots and lower terminal slots for accommodating the upper row of conductive terminals and the lower row of conductive terminals through the mounting surface, the upper row of conductive terminals comprising a plurality of signal terminals and a plurality of grounding terminals, wherein the electrical connector also comprises a plurality of insulating buckle blocks and a shielding strip, each insulating buckle block being fixed with a pair of signal terminals, the insulating buckle blocks being fixed on the shielding strip, and grounding terminals being assembled on both sides of each pair of signal terminals on the shielding strip, and a first gap and a second gap being formed between the grounding terminal and the shielding strip.

[0007] Furthermore, in the above technical solution, the shielding strip includes an insulator and a layer of conductive resin coated on the entire insulator.

[0008] Furthermore, the shielding pressure strip has a plurality of installation grooves fixed by a plurality of insulating buckle blocks, and holes are formed through the convex ribs on both sides of each installation groove.

[0009] Furthermore, in the above technical solution, each insulating buckle block includes a main body for holding a pair of signal terminals, and the main body is provided with an open groove for holding a pair of signal terminals in parallel; the main body is extended with a protrusion fixed in the installation groove, and the two side surfaces of the protrusion have interference parts that interfere with the installation groove.

[0010] Furthermore, in the above technical solution, the protrusion extends into the installation groove and is provided with a quick installation guide portion.

[0011] Furthermore, in the above technical solution, the grounding terminal has an extending portion extending into the hole, and the second gap includes an upper gap and a lower gap, wherein: the upper gap is the distance formed by the extending portion and the upper side of the hole, and the lower gap is the distance formed by the extending portion and the lower side of the hole.

[0012] Furthermore, in the above technical solution, the grounding terminal includes a second elastic contact arm, a second welding leg and a second joint portion connecting the second elastic contact arm and the second welding leg; the second joint portion includes a second retaining portion, a third side vertical section connected to the second retaining portion, and a fourth side vertical section, the third side vertical section is connected to one end of the second elastic contact arm, the fourth side vertical section is connected to the second welding leg, and the extension portion extends from the third side vertical section into the shielding strip hole.

[0013] Furthermore, in the above technical solution, a second contact point contact portion is formed at the free end of the second elastic contact arm, and the second retaining portion is a U-shaped structure.

[0014] Furthermore, in the above technical solution, the third side vertical section is located on the side of the shielding pressure strip, and the first gap is formed between the third side vertical section and the shielding pressure strip.

[0015] Furthermore, in the above technical solution, the upper terminal groove also penetrates the front surface and the rear surface of the insulating body respectively, and the lower terminal groove penetrates the front surface of the insulating body; a longitudinal groove for accommodating the shielding strip is provided on the rear surface of the insulating body.

[0016] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: the present invention assembles a shielding strip on the grounding terminal so that the grounding terminal and the shielding strip retain a first gap a and a second gap b, and the signal terminal is assembled on the shielding strip through the insulating buckle block without causing a short circuit, and the grounding terminal is directly shielded to reduce impedance crosstalk; in addition, the shielding strip of the present invention is composed of an insulator and a layer of conductive resin applied to the entire insulator, which is cost-effective and easy to manufacture compared to using metal materials to make the shielding strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is an exploded view of the electrical connector of the present invention;

[0018] Figure 2 is an exploded view of the electrical connector of the present invention from another angle;

[0019] Figure 3 is an exploded view of the electrical connector terminal module of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0022] Figure 6 yes Figure 1 The enlarged image of point C in the middle; and

[0023] Figure 7 It is a three-dimensional diagram of the electrical connector of the present invention.

[0024] Description of reference numerals: 100 electrical connector, 1 insulating body, 11 main body, 111 front surface, 112 rear surface, 113 mounting surface, 12 plug-in slot, 121 upper terminal slot, 122 lower terminal slot, 123 groove, 2 upper row of conductive terminals, 21 signal terminal, 215 first elastic contact arm, 216 first contact point contact portion, 212 first welding leg, 217 first combining portion, 211 first U-shaped retaining portion, 213 first side vertical section, 214 second side vertical section, 22 Ground terminal, 225 second elastic contact arm, 226 second contact contact portion, 222 second welding foot, 227 second combining portion, 221 second U-shaped retaining portion, 223 third side vertical section, 224 fourth side vertical section, 228 extending portion, 3 insulating buckle block, 31 main body, 311 opening groove, 32 protrusion, 321 guide portion, 322 interference portion, 4 shielding pressure strip, 41 insulator, 42 mounting groove, 411 rib, 412 hole portion, 5 lower row conductive terminals, 6 terminal module. DETAILED DESCRIPTION

[0025] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0026] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0027] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0028] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0032] In this embodiment, if Figures 1 to 3 As shown, an electrical connector 100 is an SFP electrical connector, which is used to connect one printed circuit board to another printed circuit board. It is a high-precision electronic component connection, and transmits high-speed and high-frequency signals, which has different requirements from general electrical connectors. The electrical connector 100 of the present invention includes an insulating body 1, a plurality of upper row conductive terminals 2 and a plurality of lower row conductive terminals 5 that accommodate the insulating body 1, a plurality of insulating buckle blocks 3, and a shielding strip 4 coated with a conductive resin. The plurality of upper row conductive terminals 2, the plurality of insulating buckle blocks 3, and the shielding strip 4 are assembled together to form a terminal module 6.

[0033] Specifically, the insulating body 1 has a main body 11 in the shape of a longitudinal rectangular parallelepiped, and a longitudinal plug-in slot 12 for inserting a connecting plug is provided in the center of the main body 11. The main body 11 has a front surface 111 at one side of the plug-in slot 12, a rear surface 112 opposite to the front surface 111, and a mounting surface 113 for mounting the electrical connector 100 on a printed circuit board. A plurality of upper terminal slots 121 and a lower terminal slot 122 for accommodating a plurality of upper row conductive terminals 2 and a plurality of lower row conductive terminals 5 are respectively penetrated through the upper and lower walls of the plug-in slot 12 and the mounting surface 113 of the main body 11. The upper terminal slots 121 also penetrate through the front surface 111 and the rear surface 112, respectively, and the lower terminal slots 122 penetrate through the front surface 111. A longitudinal groove 123 for accommodating a shielding strip 4 is provided on the rear surface 112 of the main body 11.

[0034] The upper row of conductive terminals 2 is assembled from the terminal module 6 as a whole and is installed from the rear surface 112 of the insulating body 1 to the front in the upper row of terminal slots 121. The upper row of conductive terminals 2 includes a signal terminal 21 and a ground terminal 22 for transmitting differential signals. Figure 6 and Figure 7 As shown, a ground terminal 22 must be provided on both sides of every two signal terminals 21 to form a GSSG terminal layout area, and the signal terminal 21 and the ground terminal 22 have basically the same structure.

[0035] Each of the signal terminals 21 includes a first elastic contact arm 215, a first welding leg 212, and a first connecting portion 217 connecting the first elastic contact arm 215 and the first welding leg 212. A first contact point contact portion 216 is formed at the free end of the first elastic contact arm 215, and the other end of the first elastic contact arm 215 is connected to the first connecting portion 217. The first connecting portion 217 includes a first U-shaped holding portion 211, a first side vertical section 213 connected to the first U-shaped holding portion 211, and a second side vertical section 214. The first side vertical section 213 is connected to the other end of the first elastic contact arm 215, and the second side vertical section 214 is connected to the first welding leg 212.

[0036] The structure of the grounding terminal 22 is basically the same as that of the signal terminal 21. Two signal terminals 21 must be assembled between every two grounding terminals 22 to meet the high-speed differential signal transmission. Each grounding terminal 22 includes a second elastic contact arm 225, a second welding foot 222, and a second joint portion 227 connecting the second elastic contact arm 225 and the second welding foot 222. The second elastic contact arm 225 has a second contact point contact portion 226 formed at the free end, and the other end of the second elastic contact arm 225 is connected to the second joint portion 227. The second joint portion 227 includes a second U-shaped retaining portion 221, a third side vertical section 223 connected to the second U-shaped retaining portion 221, and a fourth side vertical section 224. The third side vertical section 223 is connected to the other end of the second elastic contact arm 225, and the fourth side vertical section 224 is connected to the second welding foot 222. The third side vertical section 223 extends into the shielding pressure strip 4 with an intrusion portion 228.

[0037] Each pair of signal terminals 21 is assembled on an insulating buckle block 3, and the assembled whole is assembled and fixed on a shielding pressure strip 4 coated with conductive resin. Figures 4 to 6 As shown, the insulating buckle block 3 includes a main body 31 for holding each pair of signal terminals 21, and the main body 31 is provided with parallel opening grooves 311 for accommodating the first side vertical section 213. The main body 31 is provided with a protrusion 32 fixed in the mounting groove 42, and the protrusion 32 extends downward with a guide portion 321 to provide the protrusion 32 for quick assembly in the mounting groove 42. The two side surfaces of the protrusion 32 are provided with interference portions 322 that interfere with the mounting groove 41, so that the insulating buckle block 3 is firmly fixed on the shielding pressure strip 4.

[0038] The shielding strip 4 itself is an insulating material, and a layer of conductive resin is coated on the insulating material including the hole 412 to form a shielding structure, so as to improve the crosstalk and return loss of the electrical connector 100 and improve the high-speed and high-frequency signal transmission of the electrical connector 100. The shielding strip 4 includes an insulator 41 and a layer of conductive resin (not shown) coated on the insulator 41 as a whole. The shielding strip 4 has a plurality of mounting grooves 42 fixed by a plurality of insulating buckle blocks 3, and the ribs 411 on both sides of the mounting groove 42 penetrate the hole 412 through which the insertion portion 228 passes. The hole 412 and the insertion portion 228 do not contact each other and retain a second gap b. The second gap b includes an upper gap and a lower gap. The upper gap is the distance formed between the insertion portion 228 and the upper side of the hole 412, and the lower gap is the distance formed between the insertion portion 228 and the lower side of the hole 412.

[0039] Please combine again Figure 6As shown, each pair of signal terminals 21 is fixed on the shielding strip 4 through the insulating buckle block 3, and a grounding terminal 22 is assembled on each convex rib 411 to form a GSSG terminal layout area, and this order is followed until all the upper row conductive terminals 2 are assembled to form a terminal module 6 for easy installation from the rear surface 112 of the insulating book 1. The third side vertical section 223 of the grounding terminal 22 is located on the side of the shielding strip 4 and a gap a is reserved. In addition, gaps a and b are reserved between the grounding terminal 22 and the shielding strip 4 so that they do not contact each other. The shielding strip 4 can better shield the grounding terminal 22 and improve the high-quality rate transmission of the signal terminal to improve the disadvantages caused by crosstalk and impedance.

[0040] To sum up, in the present invention, a shielding strip 4 is assembled on the grounding terminal 22, and gaps a and b are reserved between the grounding terminal 22 and the shielding strip 4 so as not to contact them. The signal terminal 21 is assembled on the shielding strip 4 through the insulating buckle block 3 without causing a short circuit, and the grounding terminal 22 is directly shielded to reduce impedance crosstalk. In addition, the shielding strip 4 of the present invention is composed of an insulator 41 and a layer of conductive resin applied to the entire insulator 41. If the shielding strip 4 is made directly of metal material, the shielding strip 4 with such a structure is quite difficult to manufacture and is not conducive to cost saving. The combination of an insulator and a conductive resin is quite simple and easy to manufacture.

[0041] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0042] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An electrical connector, comprising an insulating body, an upper row of conductive terminals and a lower row of conductive terminals, the insulating body comprising a plug-in slot, a front surface located on one side of the plug-in slot, a rear surface opposite to the front surface and a mounting surface for a printed circuit board to adapt to, a plurality of upper terminal slots for receiving the upper row of conductive terminals are formed through the upper wall of the plug-in slot facing the mounting surface, a plurality of lower terminal slots for receiving the lower row of conductive terminals are formed through the lower wall of the plug-in slot facing the mounting surface, the upper row of conductive terminals comprises a plurality of signal terminals and a plurality of ground terminals, characterized in that: The electrical connector also includes a plurality of insulating buckle blocks and shielding strips, each insulating buckle block is fixed with a pair of signal terminals, the insulating buckle blocks are fixed on the shielding strips, the shielding strips are located on both sides of each pair of signal terminals and are assembled with grounding terminals; the shielding strips include an insulator and a layer of conductive resin coated on the insulator as a whole, the insulator has a plurality of mounting grooves combined with the plurality of insulating buckle blocks, each mounting groove is formed with ribs on both sides, the ribs have a hole portion penetrating the insulator, the grounding terminal has an insertion portion, the insertion portion is inserted into the hole portion coated with the conductive resin to form a shielding structure, the third side vertical section of the grounding terminal is located on the side of the shielding strip, the first gap is formed between the third side vertical section and the shielding strip, the insertion portion extends from the third side vertical section into the hole portion of the shielding strip, and the insertion portion does not contact the upper and lower sides of the hole portion to form a second gap.

2. The electrical connector according to claim 1, wherein: Each insulating buckle block includes a main body for holding a pair of signal terminals, the main body is provided with an open slot for holding a pair of signal terminals in parallel; the main body is provided with a protruding block fixed in the installation slot, and the two sides of the protruding block have interference parts interfering with the installation slot.

3. The electrical connector according to claim 2, characterized in that: The protruding block is provided with a quick installation guide portion extending into the installation groove.

4. The electrical connector according to claim 3, characterized in that: The second gap forms an upper gap and a lower gap, the upper gap is the distance formed by the protruding portion and the upper side of the hole portion, and the lower gap is the distance formed by the protruding portion and the lower side of the hole portion.

5. The electrical connector according to claim 4, characterized in that: The grounding terminal includes a second elastic contact arm, a second welding foot, and a second joint portion connecting the second elastic contact arm and the second welding foot; the second joint portion includes a second retaining portion, a third side vertical section connected to the second retaining portion, and a fourth side vertical section, the third side vertical section is connected to one end of the second elastic contact arm, and the fourth side vertical section is connected to the second welding foot.

6. The electrical connector according to claim 5, characterized in that: A second contact point contact portion is formed at the free end of the second elastic contact arm, and the second retaining portion is a U-shaped structure.

7. The electrical connector according to any one of claims 1 to 6, characterized in that: The upper terminal groove also penetrates the front surface and the rear surface of the insulating body respectively, and the lower terminal groove penetrates the front surface of the insulating body; a longitudinal groove for accommodating the shielding pressure strip is arranged on the rear surface of the insulating body.

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