Electric connector

Abstract

The utility model discloses an electric connector, which is mounted on a circuit board, is used for being plugged with a butt joint element, and comprises an insulating body provided with a plurality of accommodating grooves, each accommodating groove comprises a positioning groove, a first wall and a second wall which are oppositely arranged left and right are arranged in each positioning groove, and a first inclined wall and a second inclined wall which are oppositely arranged left and right are arranged in each positioning groove; wherein the first wall is connected with the first inclined wall and the second wall is connected with the second inclined wall; the plurality of signal terminals are accommodated in the accommodating groove, and each signal terminal comprises a contact arm, a connecting arm and a fixing arm for connecting the contact arm and the connecting arm; the fixing arm is contained in the positioning groove, the fixing arm interferes with the first inclined wall and the second inclined wall, the fixing arm is provided with a first surface and a second surface which are oppositely arranged in the left-right direction, and in the left-right direction, the first distance from the first surface to the first wall is larger than the second distance from the second surface to the second wall. The impedance is adjusted while the terminal is stably fixed, and the purpose of impedance matching is achieved.

Description

Technical field

[0001] The utility model relates to an electric connector, in particular to an electric connector used for plugging an electronic card. [Background Technology]

[0002] There is a slot-type electrical connector, which includes an insulating body with a slot provided in the longitudinal direction of the insulating body. Two rows of receiving grooves are provided on both sides of the slot to accommodate the upper and lower rows of terminals. Each receiving groove has a positioning groove. The terminal has a vertical base. A fixing portion extends forward from the base and is inserted into the positioning groove. The fixing portion interferes with the positioning groove in the upper and lower directions. The fixing portion is arranged perpendicular to the base. A welding portion extends downward from the base and is welded to a circuit board. A contact portion extends upward and forward from the base. The contact portion is exposed in the slot. After an electronic card is inserted into the slot, it is electrically connected to the contact portion.

[0003] Since the entire terminal is only fixed by interference with a conventional extended fixing portion, when the electronic card and the contact portion are plugged in multiple times or plugged in crookedly, the entire terminal is prone to loosening, which in turn causes the contact portion to become crooked and the contact to be unstable.

[0004] In addition, in order to prevent the entire terminal from loosening, the left and right sides of the base are generally limited by the inner walls of the receiving groove. Although this can alleviate the loosening of the terminal to a certain extent, it brings another hidden danger, that is, the dielectric constant of the insulating body is higher than the dielectric constant of air, which causes the impedance at the base to be lowered.

[0005] Therefore, it is necessary to design an improved electrical connector to overcome the above problems. [Utility Model Content]

[0006] The invention purpose of the utility model is to provide an electrical connector, which is provided with a first inclined wall and a second inclined wall arranged opposite to each other on the left and right sides in a positioning groove, and a first wall and a second wall arranged opposite to each other on the left and right sides, wherein the first wall is connected to the first inclined wall, and the second wall is connected to the second inclined wall, wherein in the left and right directions, a fixed arm of the signal terminal interferes with the first inclined wall and the second inclined wall respectively, and stably fixes the signal terminal in the receiving groove, when the electronic card and the contact part are plugged in multiple times or plugged in crookedly, the signal terminal is not easy to loosen, and the contact stability is not affected, and the fixed arm has a first distance from the first wall, and a second distance from the fixed arm to the second wall, and the first distance is greater than the second distance, so that the first surface of the fixed arm is exposed to the air, and since the dielectric constant of air is smaller than the dielectric constant of plastic, the capacitance C is reduced and the impedance Z is increased, thereby matching the impedance of the fixed arm and improving the high-frequency performance.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An electrical connector for docking with a docking element and mounted on a circuit board, comprising: an insulating body, provided with a plurality of receiving slots, each receiving slot comprising a positioning slot, a first wall and a second wall arranged opposite to each other on the left and right sides thereof being provided in the positioning slot, a first inclined wall and a second inclined wall arranged opposite to each other on the left and right sides thereof being provided in the positioning slot, wherein the first wall connects the first inclined wall, and the second wall connects the second inclined wall; a plurality of signal terminals are accommodated in the receiving slots, each signal terminal comprising a contact arm, a connecting arm, and a fixed arm connecting the contact arm and the connecting arm; the fixed arm is accommodated in the positioning slot, wherein the fixed arm interferes and is fixed with the first inclined wall and the second inclined wall respectively, the fixed arm comprising a first surface and a second surface arranged opposite to each other on the left and right sides thereof, in the left and right directions, the distance from the first surface to the first wall is a first distance, the distance from the second surface to the second wall is a second distance, and the first distance is greater than the second distance.

[0009] Furthermore, in the horizontal direction, the inclination angle of the first inclined wall is the same as the inclination angle of the second inclined wall, the first inclined wall has a first length along its inclination direction, the second inclined wall has a second length along its inclination direction, and the first length is greater than the second length.

[0010] Furthermore, in the horizontal direction, the inclination angle of the first inclined wall is different from the inclination angle of the second inclined wall, the first inclined wall has a first length along its inclination direction, the second inclined wall has a second length along its inclination direction, and the first length is equal to or greater than the second length.

[0011] Furthermore, a barrier is provided between two adjacent positioning grooves, and a communication hole passes through the barrier on the left and right sides to connect the two adjacent positioning grooves.

[0012] Furthermore, the positioning groove has a connecting wall connecting the first inclined wall and the second inclined wall, and a gap is formed between the fixing arm and the connecting wall in the up and down directions.

[0013] Furthermore, in the up and down directions, the fixed arm is provided with a first interference portion and a second interference portion, and a recessed portion is located between the first interference portion and the second interference portion. The edge of the first interference portion is fixed by interference with the first interference wall, and the edge of the second interference portion is fixed by interference with the second interference wall. The gap between the recessed portion and the connecting wall is larger than the gap between the fixed arm and the connecting wall.

[0014] Furthermore, the positioning groove also includes a third inclined wall and a fourth inclined wall, and the first wall is connected to the third inclined wall, the second wall is connected to the fourth inclined wall, and the edges of the fixed arm are respectively interfered and fixed with the third inclined wall and the fourth inclined wall.

[0015] Furthermore, in the left and right directions, two adjacent contact arms in a pair of differential signal terminals are respectively offset toward the direction close to the first wall, and the offset directions of the two contact arms are opposite. A guide groove is connected forward to the positioning groove, and the guide groove has a guide surface connected to the first wall, and the guide surface guides the signal terminal into the positioning groove.

[0016] Furthermore, the guide groove is provided with an inclined extension surface, which is connected to the first inclined wall forward. The contact arm has a contact portion, which enters the positioning groove along the extension surface. When the docking element is plugged into the electrical connector, the projection of the extension surface in the up and down directions overlaps with the fixed arm portion.

[0017] Furthermore, it further includes a plurality of grounding terminals accommodated in a plurality of accommodating grooves correspondingly arranged in the insulating body, and the grounding terminals and the signal terminals are separated by a partition rib. In the front-to-back direction, the partition rib is provided with an inclined surface arranged close to the signal terminal, and the inclined surface extends backward. In the left-right direction, at least part of the projection of the inclined surface overlaps with the connecting arm.

[0018] 14. The electrical connector of claim 13, wherein the first and second walls are located opposite each other in the positioning groove, and the first and second walls are located opposite each other in the positioning groove, wherein the first wall is connected to the first inclined wall, and the second wall is connected to the second inclined wall; the plurality of signal terminals are located in the receiving groove, each signal terminal includes a contact arm, a connecting arm, and a fixed arm connecting the contact arm and the connecting arm, the plurality of signal terminals include a plurality of pairs of differential signal terminals, in the left and right directions, adjacent two contact arms in a pair of differential signal terminals are offset in a direction close to the first wall, and the offset directions of the two contact arms are opposite; the fixed arm is located in the positioning groove, wherein the fixed arm is fixed by interference with the first and second inclined walls respectively, the fixed arm is provided with a first surface and a second surface located opposite each other in the left and right directions, the distance from the first surface to the first wall is a first distance, and the distance from the second surface to the second wall is a second distance, and the first distance is greater than the second distance.

[0019] Furthermore, in the horizontal direction, the inclination angle of the first inclined wall is the same as the inclination angle of the second inclined wall, the first inclined wall has a first length along its inclination direction, the second inclined wall has a second length along its inclination direction, and the first length is greater than the second length.

[0020] Furthermore, in the horizontal direction, the inclination angle of the first inclined wall is different from the inclination angle of the second inclined wall, the first inclined wall has a first length along its inclination direction, the second inclined wall has a second length along its inclination direction, and the first length is equal to or greater than the second length.

[0021] Furthermore, a barrier is provided between two adjacent positioning grooves, and a communication hole passes through the barrier on the left and right sides to connect the two adjacent positioning grooves.

[0022] Furthermore, the positioning groove has a connecting wall connecting the first inclined wall and the second inclined wall, and a gap is formed between the fixing arm and the connecting wall in the up and down directions.

[0023] Furthermore, in the up and down directions, the fixed arm is provided with a first interference portion and a second interference portion, and a recessed portion is located between the first interference portion and the second interference portion. The edge of the first interference portion is fixed by interference with the first interference wall, and the edge of the second interference portion is fixed by interference with the second interference wall. The gap between the recessed portion and the connecting wall is larger than the gap between the fixed arm and the connecting wall.

[0024] Furthermore, the positioning groove also includes a third inclined wall and a fourth inclined wall, and the first wall is connected to the third inclined wall, the second wall is connected to the fourth inclined wall, and the edges of the fixed arm are respectively interfered and fixed with the third inclined wall and the fourth inclined wall.

[0025] Furthermore, in the left-right direction, a guide groove is forwardly connected to the positioning groove, and the guide groove has a guide surface connected to the first wall, and the guide surface guides the signal terminal into the positioning groove.

[0026] Furthermore, the guide groove is provided with an inclined extension surface, which is connected to the first inclined wall forward. The contact arm has a contact portion, which enters the positioning groove along the extension surface. When the docking element is plugged into the electrical connector, the projection of the extension surface in the up and down directions overlaps with the fixed arm portion.

[0027] Furthermore, it further includes a plurality of grounding terminals accommodated in a plurality of accommodating grooves correspondingly arranged in the insulating body, and the grounding terminals and the signal terminals are separated by a partition rib. In the front-to-back direction, the partition rib is provided with an inclined surface arranged close to the signal terminal, and the inclined surface extends backward. In the left-right direction, at least part of the projection of the inclined surface overlaps with the connecting arm.

[0028] Compared with the prior art, the electrical connector of the present invention has the following beneficial effects:

[0029] By arranging the first and second inclined walls opposite to each other in the left and right directions in the positioning groove, and the first wall and the second wall opposite to each other in the left and right directions, the first wall is connected to the first inclined wall, and the second wall is connected to the second inclined wall, wherein in the left and right directions, a fixed arm of the signal terminal interferes with the first and second inclined walls respectively, so that the signal terminal

[0030] The electronic card is stably fixed in the receiving slot. When the electronic card is inserted into the contact portion multiple times or inserted crookedly, the signal terminal is not easily loosened, and the contact stability is not affected. In addition, a first distance is set between the fixed arm and the first wall, and a second distance is set between the fixed arm and the second wall. The first distance is greater than the second distance, so that the first surface of the fixed arm is exposed to the air. Since the dielectric constant of air is smaller than the dielectric constant of plastic, the capacitance C is reduced and the impedance Z is increased, thereby achieving impedance matching of the fixed arm and improving high-frequency performance.

Brief Description of the Drawings

[0031] Figure 1 This is a three-dimensional exploded view of the electrical connector of the present invention;

[0032] Figure 2 for Figure 1 A three-dimensional view of the assembled CEC connector;

[0033] Figure 3 for Figure 2 Partial front view in;

[0034] Figure 4 for Figure 2 A rear view after hiding the second grounding member;

[0035] Figure 5 for Figure 4 A partial top view after hiding the first grounding member;

[0036] Figure 6 for Figure 4 A partial enlarged view of middle A;

[0037] Figure 7 for Figure 4 Cross-sectional view along direction BB;

[0038] Figure 8 for Figure 1 The three-dimensional schematic diagram shows only part of the ground terminals and part of the signal terminals;

[0039] Figure 9 for Figure 8 Rear view of the ground and signal terminals.

[0040] Description of the accompanying drawings for the specific embodiments:

[0041] Electrical connector 100 Insulation body 1 Frontend 11 Backend 12 Slot 13 Terminal slot 14 Accommodation slot 15 Storage tank 16 Positioning slot 161 First inclined wall 1611 Second inclined wall 1612 Connecting wall 1613 First Wall 1614 Second Wall 1615 Third inclined wall 1616 Fourth inclined wall 1617 Guide groove 162 Guide surface 1621 Extension surface 1622 Separator rib 17 Incline 171 rib 18 Fence 19 Communication hole 191 First terminal 2 Signal terminal 21 Contact arm 211 Contact Department 2111 Fixed arm 212 First surface 212A Second surface 212B First interference part 2121 Second interference part 2122 Depression 2123 Connecting arm 213 Welding Arm 2131 First distance L1 Second distance L2 Ground terminal 22 Abutment arm 221 Mounting arm 222 Main arm 223 Clamping arm 224 Second terminal 3 First grounding member 4 Holding arm 41 Second grounding member 5 Clamping hole 51 Buckle hole 52 Circuit board 200 [Specific implementation method]

[0042] In order to facilitate a better understanding of the purpose, structure, features and effects of the present invention, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods.

[0043] For ease of understanding, the Z-axis extension direction is defined as the up-down direction (where the positive direction of the Z-axis is the upward direction), the Y-axis extension direction is defined as the left-right direction (where the positive direction of the Y-axis is the right direction), and the X-axis extension direction is defined as the front-back direction (where the positive direction of the X-axis is the forward direction).

[0044] like Figures 1 to 9 1 and 2. FIG. 1 shows a related drawing of an electrical connector 100 of the present invention. The electrical connector 100 is used to dock with a docking component (not shown) and is mounted on a circuit board. In this embodiment, the docking component is an electronic card. In other embodiments, the docking component may also be other electrical components, such as a docking connector having an insulating seat and docking terminals.

[0045] like Figure 1 、 Figure 2 and Figure 3 As shown, in this embodiment, the electrical connector 100 includes an insulating body 1 , a plurality of first terminals 2 , a plurality of second terminals 3 , and a grounding member mounted on the insulating body 1 . The plurality of first terminals 2 and the plurality of second terminals 3 are accommodated in the insulating body 1 .

[0046] like Figure 3 As shown, the insulating body 1 extends in the left-right direction, and has a front end 11 and a rear end 12 arranged opposite to each other, and in the up-down direction, the insulating body 1 is recessed from the front end 11 to the rear with a slot 13, the slot 13 extends in the front-to-back direction, the slot 13 is provided for docking components to be plugged in, a plurality of terminal slots 14 are recessed from the front end 11 to the rear to accommodate a plurality of second terminals 3, the terminal slots 14 are arranged at intervals below the slot 13 and are connected to the slot 13, the insulating body 1 is provided with a plurality of receiving slots 16 and a plurality of receiving slots 15 arranged in the left-right direction and located at the rear end 12 of the slot 13, the receiving slots 16 and the terminal slots 14 are staggered in the arrangement direction, and the receiving slots 15 are also staggered in the arrangement direction with the terminal slots 14.

[0047] like Figure 4 and Figure 5 As shown, each signal terminal 21 is accommodated in each corresponding receiving groove 16, and each grounding terminal 22 is accommodated in each corresponding receiving groove 15. The insulating body 1 is provided with a plurality of partition ribs 17, and the partition ribs 17 are located between adjacent receiving grooves 15 and receiving grooves 16 to separate the grounding terminal 22 from the signal terminal 21. The insulating body 1 is also provided with a plurality of partition ribs 18, and the partition ribs 18 and the partition ribs 17 are alternately arranged on the left and right. The partition ribs 18 are located between two adjacent signal terminals 21, and a partition fence 19 is provided between two adjacent receiving grooves 15. The partition fence 19 is not connected to the partition rib 18, wherein the partition fence 19 has a connecting hole 191 in the left and right direction to connect the two adjacent positioning grooves 161. In addition, in the left and right direction, the partition rib 17 is provided with an inclined surface arranged close to the signal terminal 21.

[0048] like Figure 6 As shown, each receiving groove 16 includes a positioning groove 161, and a first wall 1614 and a second wall 1615 are provided in the positioning groove 161. A first inclined wall 1611 and a second inclined wall 1612 are provided in the positioning groove 161. A connecting wall 1613 connects the first inclined wall 1611 and the second inclined wall 1612. In the vertical direction, the first inclined wall 1611 and the second inclined wall 1612 have the same inclination angle. The first inclined wall 1611 has a first length along its inclination direction. degrees, the second inclined wall 1612 has a second length along its inclined direction, the first length is greater than the second length, the first wall 1614 connects the first inclined wall 1611, the second wall 1615 connects the second inclined wall 1612, the positioning groove 161 also includes a third inclined wall 1616 and a fourth inclined wall 1617, the first wall 1614 connects the third inclined wall 1616, the second wall 1615 connects the fourth inclined wall 1617, and the connecting wall 1613 connects the third inclined wall 1616 and the fourth inclined wall 1617.

[0049] like Figure 6 As shown, each receiving groove 16 also includes a guide groove 162 connected to the positioning groove 161, wherein the guide groove 162 is provided with an inclined guide surface 1621, and the guide surface 1621 extends backward and is connected to the first wall 1614. The guide groove 162 is provided with an extension surface 1622, and the extension surface 1622 extends along the inclination direction of the guide surface 1621 and is connected to the first inclined wall 1611.

[0050] like Figure 4 、 Figure 8 and Figure 9 As shown, the plurality of first terminals 2 include a plurality of signal terminals 21 and a plurality of ground terminals 22. The plurality of signal terminals 21 include a plurality of pairs of differential signal terminals. The plurality of differential signal terminals and the plurality of ground terminals 22 are alternately arranged in the left-right direction, that is, a pair of differential signal terminals is located between two adjacent ground terminals 22. Each signal terminal 21 includes a fixed arm 212, which is connected forwardly to a contact arm 211 and downwardly to a connecting arm 213. The connecting arm 213 includes a soldering portion 2131 for soldering to a circuit board. In the left-right direction, two adjacent contact arms 211 in the differential signal terminal are offset in a direction close to the first wall 1614, and the offset directions of the two contact arms 211 are opposite. The offset direction of two adjacent welding portions 2131 in the differential signal terminal is consistent with that of the contact arms 211. This increases the distance between the two adjacent signal terminals 21, thereby reducing crosstalk. Furthermore, the two adjacent connecting arms 213 within the differential signal terminal pair are moved closer in relative directions, thereby increasing the mutual inductance within the pair, while keeping the self-inductance unchanged, and reducing the inductance of the main body to the outside.

[0051] Figure 8 As shown, in the left-right direction, the fixed arm 212 has a first surface 212A and a second surface 212B that are disposed opposite each other. In the up-down direction, the upper and lower surfaces respectively protrude to form a first interference portion 2121 and a second interference portion 2122, and are recessed to form a recessed portion 2123. Furthermore, the abutting arm 221 has a contact portion 2111. When the abutting arm 221 contacts the docking element, causing the contact portion 2111 to move upward to its maximum distance, the contact portion 2111 contacts the receiving slot 16 upward.

[0052] like Figure 6 As shown, when the contact arm 211 enters the positioning groove 161 along the front-to-back direction, the contact arm 211 is installed along the guide surface 1621 to prevent the contact arm 211 from being damaged by collision during the process of entering the receiving groove 16, thereby affecting the performance of the signal terminal 21. Secondly, if the contact arm 211 accidentally deviates upward, the extension surface 1622 will be used to avoid the contact portion 2111, preventing the extension surface 1622 from scraping the contact portion 2111 and causing the contact portion 2111 to wear. Moreover, when the docking element is plugged into the electrical connector 100, the projection of the extension surface 1622 in the up-down direction will partially overlap with the fixed arm 212, thereby preventing the fixed arm 212 from being scratched. In addition, the first wall 1614 is connected to the first inclined wall 1611, and the second wall 1615 is connected to the second inclined wall 1612. Since the first length is greater than the second length, when the contact arm 211 enters the positioning groove 161 along the first wall 1614, the positioning groove 161 has enough avoidance space to allow the contact arm 211 to enter the positioning groove 161 smoothly.

[0053] like Figure 6 and Figure 7As shown, when the fixed arm 212 enters the positioning slot 161, a first distance L1 exists between the first surface 212A of the fixed arm 212 and the first wall 1614, and a second distance L2 exists between the second surface 212B of the fixed arm 212 and the second wall 1615. The first distance L1 is greater than the second distance L2. This greater distance L1 than the second distance L2 exposes the first surface of the fixed arm to air. Because the dielectric constant of air is lower than that of plastic, the capacitance C decreases and the impedance Z increases, thereby achieving impedance matching of the fixed arm and improving high-frequency performance. Furthermore, the two adjacent connecting arms 213 are drawn closer together in relative directions, increasing the coupling between the fixed arms 212. The connecting hole 191 connects the two adjacent positioning slots 161, reducing the common-mode impedance between the pair of signal terminals 21. Furthermore, the first and second interference portions 2121 and 2122 of the fixed arm 212 interfere with the first and second inclined walls 1611, 1612, third and fourth inclined walls 1616, and 1617, respectively, stably securing the signal terminal 21 within the receiving slot 16. This prevents the signal terminal 21 from becoming loose when the electronic card is repeatedly inserted into the contact portion 2111, or when inserted at an angle. Furthermore, a first gap is defined between the connecting wall 1613 and the fixed arm 212 in the vertical direction, while a second gap is defined between the connecting wall 1613 and the recessed portion 2123 in the vertical direction. This second gap is larger than the first gap, increasing air volume and facilitating impedance adjustment. Furthermore, the inclined surface 171 extends rearward until its projection overlaps the connecting arm 213, allowing the inclined surface 171 to avoid the connecting arm 213, facilitating its installation between the partition rib 17 and the partition rib 18. Furthermore, the amount of air contact between the connecting arm 213 and the partition rib 17 and 18 is increased in the horizontal direction.

[0054] like Figure 8 As shown, each grounding terminal 22 has a mounting arm 222, an abutting arm 221 extending forward from the mounting arm 222, and a main arm 223 extending downward from the mounting arm 222. The rear surface of the mounting arm 222 extends backward to form a plurality of latching arms 224, and the plurality of latching arms 224 are arranged in the up and down direction, wherein the abutting arm 221 is used to contact the docking element.

[0055] like Figure 1 and Figure 2 As shown, the grounding member can be divided into a first grounding member 4 and a second grounding member 5. The first grounding member 4 is covered on the top of the insulating body 1, and the second grounding member 5 is installed at the rear end 12 of the insulating body 1. This can simplify the assembly difficulty of the grounding member and help improve the assembly efficiency. At the same time, the first grounding member 4 and the second grounding member 5 can be formed only by punching without the need for stamping and bending, thereby reducing the difficulty of forming the grounding member.

[0056] like Figure 2As shown, the first grounding member 4 is provided with a plurality of holding arms 41 arranged along the left-right direction, and the second grounding member 5 is provided with a plurality of holding holes 51 and a plurality of buckling holes. Each holding arm 41 is elastically snapped into each corresponding holding hole 51 to clamp the second grounding member 5 and the first grounding member 4 together. At the same time, the buckling arm 224 also cooperates with the corresponding buckling hole to buckle the grounding terminal 22 and the second grounding member 5 together to realize the electrical connection between the second grounding member 5 and the grounding terminal 22.

[0057] In summary, the electrical connector 100 of the present invention has the following beneficial effects:

[0058] (1) Compared with the prior art, the first surface 212A of the fixed arm 212 has a first distance L1 from the first wall 1614, and the second surface 212B of the fixed arm 212 has a second distance L2 from the second wall 1615. The first distance L1 is greater than the second distance L2. Since the first distance L1 is greater than the second distance L2, the first surface 212A of the fixed arm 212 is exposed to the air. Since the dielectric constant of air is smaller than the dielectric constant of plastic, the capacitance C is reduced and the impedance Z is increased, thereby achieving impedance matching of the fixed arm 212 and improving high-frequency performance.

[0059] (2) In addition, the first interference portion 2121 and the second interference portion 2122 of the fixed arm 212 interfere with the first inclined wall 1611 and the second inclined wall 1612, the third inclined wall 1616 and the fourth inclined wall 1617, respectively, to stably fix the signal terminal 21 in the receiving slot 16. When the electronic card is plugged into the contact portion 2111 multiple times or plugged in crookedly, the signal terminal 21 is not easy to loosen, and the contact stability is not affected.

[0060] (3) The first wall 1614 is connected to the first inclined wall 1611, and the second wall 1615 is connected to the second inclined wall 1612. Since the first length is greater than the second length, when the contact arm 211 enters the positioning groove 161 along the first wall 1614, the positioning groove 161 has enough avoidance space to allow the offset contact arm 211 to smoothly enter the positioning groove 161.

[0061] (4) The two adjacent connecting arms 213 are pulled closer in relative directions, so that the coupling between the fixed arms 212 is improved, and the two adjacent positioning grooves 161 are connected through the connecting hole 191, so that the common mode impedance between the pair of signal terminals 21 is reduced.

[0062] (5) When the contact arm 211 enters the positioning groove 161 along the front-to-back direction, the contact arm 211 is installed along the guide surface 1621 to prevent the contact arm 211 from being damaged during the process of entering the receiving groove 16 and affecting the performance of the signal terminal 21.

[0063] (6) If the contact arm 211 accidentally deflects upward, the extension surface 1622 will be used to avoid the contact portion 2111, preventing the extension surface 1622 from scraping the contact portion 2111 and causing the contact portion 2111 to wear. When the docking element is plugged into the electrical connector 100, the projection of the extension surface 1622 in the vertical direction will partially overlap with the fixed arm 212, preventing the fixed arm 212 from being scraped.

[0064] (7) The inclined surface 171 extends backward until the projection of the inclined surface 171 overlaps with the connecting arm 213, so that the inclined surface 171 avoids the connecting arm 213, making it easier for the connecting arm 213 to be installed between the partition rib 17 and the partition rib 18. At the same time, in the left and right directions, the amount of air that the connecting arm 213 contacts with is increased.

[0065] (8) In addition, the first interference portion 2121 and the second interference portion 2122 of the fixed arm 212 interfere with the first inclined wall 1611 and the second inclined wall 1612, and the third inclined wall 1616 and the fourth inclined wall 1617, respectively, to stably fix the signal terminal 21 in the receiving groove 16, thereby preventing the signal terminal 21 from swinging in the left and right directions and affecting the contact stability.

[0066] (9) A first gap is formed between the connecting wall 1613 and the fixed arm 212 in the vertical direction, and a second gap is formed between the connecting wall 1613 and the recessed portion 2123 in the vertical direction. The second gap is larger than the first gap, so that the air volume is increased, which facilitates further adjustment of the impedance.

[0067] (10) The first grounding member 4 is covered on the top of the insulating body 1, and the second grounding member 5 is installed on the rear end 12 of the insulating body 1, which can simplify the assembly difficulty of the grounding member and help improve the assembly efficiency. At the same time, the first grounding member 4 and the second grounding member 5 can be formed only by punching without the need for stamping and bending, thereby reducing the difficulty of forming the grounding member.

[0068] The above detailed description is only an illustration of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this invention are included in the patent scope of this invention.

Claims

1. An electrical connector for docking with a docking element and mounted on a circuit board, characterized in that: include: An insulating body is provided with a plurality of receiving grooves, each receiving groove includes a positioning groove, a first wall and a second wall are provided in the positioning groove and are opposite to each other on the left and right sides, a first inclined wall and a second inclined wall are provided in the positioning groove and are opposite to each other on the left and right sides, wherein the first wall connects the first inclined wall and the second wall connects the second inclined wall; A plurality of signal terminals are received in the receiving slots, each signal terminal comprising a contact arm, a connecting arm, and a fixed arm connecting the contact arm and the connecting arm; The fixed arm is accommodated in the positioning groove, wherein the fixed arm is respectively interfered and fixed with the first inclined wall and the second inclined wall, and the fixed arm is provided with a first surface and a second surface arranged opposite to each other on the left and right sides. In the left and right directions, the distance from the first surface to the first wall is a first distance, and the distance from the second surface to the second wall is a second distance, and the first distance is greater than the second distance.

2. The electrical connector according to claim 1, wherein: In the horizontal direction, the inclination angle of the first inclined wall is the same as that of the second inclined wall. The first inclined wall has a first length along its inclination direction, and the second inclined wall has a second length along its inclination direction. The first length is greater than the second length.

3. The electrical connector according to claim 1, wherein: In the horizontal direction, the inclination angle of the first inclined wall is different from the inclination angle of the second inclined wall. The first inclined wall has a first length along its inclination direction, and the second inclined wall has a second length along its inclination direction. The first length is equal to or greater than the second length.

4. The electrical connector according to claim 1, wherein: A barrier is provided between two adjacent positioning grooves, and a communication hole passes through the barrier on the left and right sides to communicate the two adjacent positioning grooves.

5. The electrical connector according to claim 1, wherein: The positioning groove has a connecting wall connecting the first inclined wall and the second inclined wall. In the up and down directions, there is a gap between the fixing arm and the connecting wall.

6. The electrical connector according to claim 5, wherein: In the up and down directions, the fixed arm is provided with a first interference portion and a second interference portion, and a recessed portion is located between the first interference portion and the second interference portion. The edge of the first interference portion is fixed by interference with the first interference wall, and the edge of the second interference portion is fixed by interference with the second interference wall. The gap between the recessed portion and the connecting wall is larger than the gap between the fixed arm and the connecting wall.

7. The electrical connector according to claim 1, wherein: The positioning groove further includes a third inclined wall and a fourth inclined wall, and the first wall is connected to the third inclined wall, the second wall is connected to the fourth inclined wall, and the edges of the fixed arm are respectively interfered and fixed with the third inclined wall and the fourth inclined wall.

8. The electrical connector according to claim 1, wherein: In the left and right directions, two adjacent contact arms in a pair of differential signal terminals are offset toward the first wall, and the offset directions of the two contact arms are opposite. A guide groove is connected forward to the positioning groove. The guide groove has a guide surface connected to the first wall, and the guide surface guides the signal terminal into the positioning groove.

9. The electrical connector according to claim 8, wherein: The guide groove is provided with an inclined extension surface, which is connected to the first inclined wall forward. The contact arm has a contact portion, which enters the positioning groove along the extension surface. When the docking element is plugged into the electrical connector, the projection of the extension surface in the up and down directions overlaps with the fixed arm portion.

10. The electrical connector according to claim 1, wherein: It further includes a plurality of grounding terminals accommodated in a plurality of receiving grooves correspondingly arranged in the insulating body, and the grounding terminals and the signal terminals are separated by a partition rib. In the front-to-back direction, the partition rib is provided with an inclined surface arranged near the signal terminal, and the inclined surface extends backward. In the left-right direction, at least part of the projection of the inclined surface overlaps with the connecting arm.

11. An electrical connector for docking with a docking element and mounted on a circuit board, characterized in that: include: An insulating body is provided with a plurality of receiving grooves, each receiving groove includes a positioning groove, a first wall and a second wall are provided in the positioning groove opposite to each other, a first inclined wall and a second inclined wall are provided in the positioning groove opposite to each other, wherein the first wall connects the first inclined wall and the second wall connects the second inclined wall; A plurality of signal terminals are received in the receiving slots, each signal terminal comprising a contact arm, a connecting arm, and a fixed arm connecting the contact arm and the connecting arm, the plurality of signal terminals comprising a plurality of pairs of differential signal terminals, wherein in the left-right direction, two adjacent contact arms in a pair of differential signal terminals are offset in a direction close to the first wall, and the offset directions of the two contact arms are opposite; The fixed arm is accommodated in the positioning groove, wherein the fixed arm is respectively interfered and fixed with the first inclined wall and the second inclined wall, and the fixed arm is provided with a first surface and a second surface arranged opposite to each other on the left and right sides. In the left and right directions, the distance from the first surface to the first wall is a first distance, and the distance from the second surface to the second wall is a second distance, and the first distance is greater than the second distance.

12. The electrical connector according to claim 1, wherein: In the horizontal direction, the inclination angle of the first inclined wall is the same as that of the second inclined wall. The first inclined wall has a first length along its inclination direction, and the second inclined wall has a second length along its inclination direction. The first length is greater than the second length.

13. The electrical connector according to claim 1, wherein: In the horizontal direction, the inclination angle of the first inclined wall is different from the inclination angle of the second inclined wall. The first inclined wall has a first length along its inclination direction, and the second inclined wall has a second length along its inclination direction. The first length is equal to or greater than the second length.

14. The electrical connector according to claim 1, wherein: A barrier is provided between two adjacent positioning grooves, and a communication hole passes through the barrier on the left and right sides to connect the two adjacent positioning grooves.

15. The electrical connector according to claim 1, wherein: The positioning groove has a connecting wall connecting the first inclined wall and the second inclined wall. In the up and down directions, there is a gap between the fixing arm and the connecting wall.

16. The electrical connector according to claim 15, wherein: In the up and down directions, the fixed arm is provided with a first interference portion and a second interference portion, and a recessed portion is located between the first interference portion and the second interference portion. The edge of the first interference portion is fixed by interference with the first interference wall, and the edge of the second interference portion is fixed by interference with the second interference wall. The gap between the recessed portion and the connecting wall is larger than the gap between the fixed arm and the connecting wall.

17. The electrical connector according to claim 1, wherein: The positioning groove further includes a third inclined wall and a fourth inclined wall, and the first wall is connected to the third inclined wall, the second wall is connected to the fourth inclined wall, and the edges of the fixed arm are respectively interfered and fixed with the third inclined wall and the fourth inclined wall.

18. The electrical connector according to claim 1, wherein: In the left-right direction, a guide groove is forwardly connected to the positioning groove, and the guide groove has a guide surface connected to the first wall, and the guide surface guides the signal terminal into the positioning groove.

19. The electrical connector according to claim 18, wherein: The guide groove is provided with an inclined extension surface, which is connected to the first inclined wall forward. The contact arm has a contact portion, which enters the positioning groove along the extension surface. When the docking element is plugged into the electrical connector, the projection of the extension surface in the up and down directions overlaps with the fixed arm portion.

20. The electrical connector according to claim 1, wherein: It further includes a plurality of grounding terminals accommodated in a plurality of receiving grooves correspondingly arranged in the insulating body, and the grounding terminals and the signal terminals are separated by a partition rib. In the front-to-back direction, the partition rib is provided with an inclined surface arranged near the signal terminal, and the inclined surface extends backward. In the left-right direction, at least part of the projection of the inclined surface overlaps with the connecting arm.

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