CN204376029U - Plug connector - Google Patents

Abstract

A plug electrical connector includes an insulating body, a plurality of upper-row elastic terminals, a plurality of lower-row elastic terminals, and a rear-end fixing block. The insulating main body includes a rear end butt joint portion, and the rear end butt joint portion is formed on the rear side of the insulating main body. The rear fixing block is installed on the rear side of the insulating body, and the rear fixing block includes a plurality of perforations and buckling parts. The plurality of perforations penetrate from the front side to the rear side of the rear-end fixing block, and the rear sides of the plurality of upper-row elastic terminals and the plurality of lower-row elastic terminals respectively pass through the plurality of through-holes. The buckle part is formed on the front side of the rear end fixing block, and the buckle part cooperates with the rear end butt joint part and is fastened and fixed.

Description

plug electrical connector

technical field

The utility model relates to an electrical connector, in particular to a plug electrical connector.

Background technique

Nowadays, all kinds of electronic products are becoming more and more multifunctional, providing unlimited convenience and high convenience. The interface of general electrical connectors is Universal Serial Bus (USB for short), which is generally used by the public, and is transmitted by USB2.0 The specification has been developed to the current USB3.0 transmission specification with faster transmission speed.

The existing USB plug electrical connector includes an insulating base body, a plurality of terminals and a rear end base body. After assembling the plurality of terminals inside the insulating base body, it is assembled with the rear end base body so that the pins of the plurality of terminals pass through the rear end base body. The rear side is soldered to the circuit board.

Generally, the structural test of the electrical connector is carried out. For example, during the bending test, a bending force is applied between the insulating seat body and the rear end seat body. However, because there is no anti-bending structure between the two, the insulating seat body The bending force between the terminal and the rear-end housing is bent and separated from each other, causing a plurality of terminals to bend and detach from the position originally fixed in the insulating housing and the rear-end housing, resulting in defective products. Therefore, how to solve the problem of conventional knowledge structure is the problem that relevant practitioners must think about.

Utility model content

In view of the above problems, the utility model provides a plug electrical connector, which includes a shielding shell, an insulating body, a plurality of upper elastic terminals, a plurality of lower elastic terminals and a rear fixing block. The shielding case includes a receiving slot. The insulating body is located in the storage groove. The insulating body includes an upper plate body, a lower plate body, a slot and a rear end docking part. The slot is located between the upper plate body and the lower plate body. The slot is formed on the front side of the insulating body and the rear end is docked. A portion is formed on the rear side of the insulating body. The plurality of upper-row elastic terminals includes a plurality of upper-row elastic signal terminals, at least one upper-row elastic power terminal and at least one upper-row elastic ground terminal, and each upper-row elastic terminal is arranged on the insulating body and located on the lower surface of the upper board. The plurality of lower elastic terminals includes a plurality of lower elastic signal terminals, at least one lower elastic power supply terminal and at least one lower elastic ground terminal, and each lower elastic terminal is disposed on the insulating body and located on the upper surface of the lower board. The rear fixing block is installed on the rear side of the insulating body, and the rear fixing block includes a plurality of perforations and buckling parts. The plurality of perforations penetrate from the front side to the rear side of the rear-end fixing block, and the rear sides of the plurality of upper-row elastic terminals and the plurality of lower-row elastic terminals respectively pass through the plurality of through-holes. The buckle part is formed on the front side of the rear end fixing block, and the buckle part cooperates with the rear end butt joint part and is fastened and fixed.

To sum up, the utility model utilizes concave-convex design and size cooperation between the butt joint part of the rear end of the insulating body and the buckle part of the rear-end fixing block to strengthen the fixing effect between the two, and prevent the insulating body from being damaged during the bending test. The main body and the rear-end fixing block are bent and separated from each other, which causes the problem that the upper-row welding sections of the plurality of upper-row elastic terminals and the lower-row welding sections of the plurality of lower-row elastic terminals are separated from the plurality of through holes of the rear-end fixing block, effectively Improve the connection function between the insulating body and the rear-end fixing block and the overall strength of the plug electrical connector. In addition, the plurality of upper-row elastic terminals and the plurality of lower-row elastic terminals of the plug electrical connector are upside down, and the arrangement of the plurality of upper-row contact segments is opposite to the arrangement of the plurality of lower-row contact segments, providing the plug electrical connector. When plugged into the socket electrical connector, the plurality of upper row contact sections of the plug electrical connector can be connected with the plurality of upper row terminals of the socket electrical connector, and the plug electrical connector is reversely plugged into the socket electrical connector. Internally, the plurality of lower contact sections of the plug electrical connector can also be connected with the plurality of upper row terminals of the socket electrical connector.

Description of drawings

FIG. 1 is an exploded schematic diagram (1) of the electrical plug connector of the present invention.

FIG. 1A is an exploded schematic diagram (2) of the electrical plug connector of the present invention.

FIG. 1B is a schematic cross-sectional view of the electrical plug connector of the present invention.

Fig. 2 is an exploded schematic view of the back side of the insulation main body and the rear end fixing block of the present invention.

FIG. 3A is a schematic side sectional view of the first embodiment of the present invention.

Fig. 3B is a schematic side sectional view of the second embodiment of the present invention.

Fig. 4 is a front exploded schematic diagram of the insulation main body and the rear end fixing block of the present invention.

FIG. 5 is a schematic diagram of the appearance of the combined circuit board of the present invention.

Symbol Description

100 plug electrical connector

11 Insulation body

111 Upper plate body

1111 lower surface

112 Lower plate body

1121 upper surface

113 slots

115 rear end docking part

116 bump

117 buckle slot

12 shielding shell

12a storage slot

13 circuit board

131 Ground contact

14 Ground terminal

15 plug terminal

151 Upper row elastic terminals

1511 Upper row elastic signal terminal

1512 Upper row elastic power terminal

1513 Upper row elastic ground terminal

1514 Upper row contact section

1515 Upper row connecting section

1516 Upper row welding section

152 Bottom row elastic terminals

1521 Bottom row of flexible signal terminals

1522 Bottom row elastic power terminals

1523 Bottom row elastic ground terminal

1524 Lower row contact section

1525 Lower connecting section

1526 Lower row welding section

21 Rear end fixed block

211 through hole

22 buckle part

221 Groove

2211 guide bevel

222 card block

24 glue filling channels

241 groove structure

41 Insulating housing.

Detailed ways

Referring to Fig. 1, Fig. 2 and Fig. 3A, it is an embodiment of the electrical plug connector of the present invention, Fig. 1 is an exploded schematic view (1), Fig. 2 is an exploded schematic view (2), and Fig. 3A is a side view sectional schematic view. The electrical plug connector 100 is a USB Type-C connection interface specification. In this embodiment, the electrical plug connector 100 includes an insulating body 11 , a plurality of upper elastic terminals 151 , a plurality of lower elastic terminals 152 , a shielding shell 12 and a rear fixing block 21 . In addition, the electrical plug connector 100 has a circuit board 13 , wires and an insulating shell 41 .

Referring to FIG. 1 , FIG. 2 and FIG. 3A , the insulating body 11 is a flat and elongated plate body, and the insulating body 11 includes an upper plate body 111 , a lower plate body 112 , a slot 113 and a rear butt joint 115 . Here, the upper plate body 111 and the lower plate body 112 are formed by insert-molding, the slot 113 is located on the front side of the insulating body 11, and the front side of the insulating body 11 described below is the insertion side, so The plug-in side is the front position where it is docked with the socket electrical connector, and the rear side of the insulating body 11 is formed with a fixed side, which is the other end opposite to the front side. The direction is the facing direction of the front side of the same insulating body 11 , and the facing direction of the rear side of the rear end fixing block 21 is the facing direction of the rear side of the same insulating body 11 . In addition, the slot 113 is located between the upper board 111 and the lower board 112 . Here, the rear butt joint portion 115 is formed on the rear side of the insulating body 11, the rear butt joint portion 115 is a protrusion 116 structure, and the protrusion 116 structure extends outward from the rear side of the insulation main body 11, and the protrusion 116 structure is not in the form of This is the limit. In addition, the upper plate 111 has a lower surface 1111 , the lower plate 112 has an upper surface 1121 , and the lower surface 1111 of the upper plate 111 corresponds to the upper surface 1121 of the lower plate 112 . .

Referring to FIG. 1A and FIG. 1B , a plurality of plug terminals 15 are disposed in the upper plate body 111 and the lower plate body 112 , and the plurality of plug terminals 15 include a plurality of upper row elastic terminals 151 and a plurality of lower row elastic terminals 152 .

Table 1:

Please refer to Fig. 1A, Fig. 1B, Table 1 and Fig. 3A again, the plurality of upper rows of elastic terminals 151 are arranged on the insulating body 11 and located on the lower surface 1111 of the upper plate body 111, here, the plurality of upper rows of elastic terminals 151 include a plurality of upper rows The elastic signal terminals 1511 , at least one upper row of elastic power terminals 1512 and at least one upper row of elastic ground terminals 1513 , and each upper row of elastic terminals 151 are disposed on the insulating body 11 and located on the lower surface 1111 of the upper board 111 . Viewed from the front of the plurality of upper-row elastic terminals 151, the plurality of upper-row elastic terminals 151 are the upper-row elastic ground terminal 1513 (Gnd) and the first pair of elastic differential signal terminals 1511 (TX1+-) from the right to the left. , the second pair of elastic differential signal terminals 1511 (D+-), the third pair of elastic differential signal terminals 1511 (RX2+-), and the upper row of elastic power supply terminals 1512 between the three pairs of elastic differential signal terminals 1511 (Power/ VBUS), the reserved terminal (RFU) and the elastic ground terminal 1513 (Gnd) on the uppermost row on the left.

Please refer to Fig. 1A, Fig. 1B, Table 1 and Fig. 3A again, a plurality of upper row elastic terminals 151 are arranged on the insulating body 11, and each upper row elastic terminal 151 includes an upper row of contact sections 1514, an upper row of connecting sections 1515 and an upper row of welding sections 1516. The upper row of connecting sections 1515 is arranged on the upper plate body 111, the upper row of contacting sections 1514 extends from one side of the upper row of connecting sections 1515 and is located on the lower surface 1111 of the upper panel body 111, and the upper row of welding sections 1516 extends from the upper row of connecting sections 1515. The other side of the connecting section 1515 extends through the insulating main body 11 . A plurality of upper-row shrapnel signal terminals 1511 extend from the slot 113 to transmit a set of first signals (i.e., USB3.0 signals), a plurality of upper-row soldering sections 1516 extend on the rear side of the insulating body 11, and a plurality of upper-row soldering sections 1516 Form a horizontal shape and use (as shown in Figure 4A).

Please refer to FIG. 1A, FIG. 1B, Table 1 and FIG. 3A again, the plurality of lower elastic terminals 152 are arranged on the insulating body 11 and located on the upper surface 1121 of the lower plate body 112, here, the plurality of lower elastic terminals 152 are composed of a plurality of The lower row of elastic signal terminals 1521 , at least one lower row of elastic power terminals 1522 and at least one lower row of elastic ground terminals 1523 , and each upper row of elastic terminals 152 are disposed on the insulating body 11 and located on the upper surface 1121 of the lower board 112 . Viewed from the front of the plurality of lower elastic terminals 152, the plurality of lower elastic terminals 152 are the lower elastic ground terminal 1523 (Gnd) and the first pair of elastic differential signal terminals 1521 (TX2+-) from left to right. , the second pair of elastic differential signal terminals 1521 (D+-), the third pair of elastic differential signal terminals 1521 (RX1+-), and the lower row of elastic power supply terminals 1522 between the three pairs of elastic differential signal terminals 1521 (Power/ VBUS), reserved terminal (RFU) and the bottom row of elastic ground terminal 1523 (Gnd) on the far right

Please refer to Fig. 1A, Fig. 1B, Table 1 and Fig. 3A again, the plurality of lower rows of elastic terminals 152 are arranged on the insulating body 11, one side of the plurality of lower rows of elastic terminals 152 has a plurality of lower rows of shrapnel contact ends 1525, and each lower row of elastic terminals 152 The terminal 152 includes a lower row of contact sections 1524 , a lower row of connecting sections 1525 and a lower row of soldering sections 1526 . The lower connecting section 1525 is arranged on the lower plate body 112, the lower contacting section 1524 extends from one side of the lower connecting section 1525 and is located on the lower surface 1111 of the lower plate body 112, and the lower welding section 1526 extends from the lower connecting section 1525. The other side of the connecting section 1525 extends out of the insulating main body 11 . A plurality of lower elastic signal terminals 1521 extend from the slot 113 to transmit a set of second signals (i.e. USB3.0 signals), a plurality of lower soldering sections 1526 extend on the rear side of the insulating body 11, and a plurality of lower soldering segments 1526 It is used to form a horizontal shape (as shown in Figure 2).

Please refer to Fig. 1A, Fig. 1B, Table 1 and Fig. 3A again. In this embodiment, it can be known from the arrangement of the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152 that the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals The terminals 152 are respectively arranged on the lower surface 1111 of the upper plate body 111 and the upper surface 1121 of the lower plate body 112, and the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152 are symmetrical to each other with the center point of the receiving groove 12a as the center of symmetry. Point symmetry, so-called point symmetry, means that after the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152 are rotated 180 degrees based on the center of symmetry as the center of rotation, the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals after rotation The elastic terminals 152 are completely overlapped, that is, the plurality of elastic terminals 151 in the upper row after rotation are located at the original arrangement position of the elastic terminals 152 in the lower row, and the elastic terminals 152 in the lower row after rotation are located in the position of the elastic terminals 151 in the upper row. original arrangement position. In other words, the plurality of upper-row elastic terminals 151 and the plurality of lower-row elastic terminals 152 are upside down, and the arrangement of the plurality of upper-row elastic terminals 151 is opposite to the arrangement of the plurality of lower-row elastic terminals 152 . Wherein, the electrical plug connector 200 is forwardly plugged into the electrical socket connector 100 for transmitting a set of first signals, and can also be plugged into the electrical plug connector 200 in the electrical receptacle connector 100 in reverse, It is used to transmit a group of second signals, and the transmission standard of a group of first signals conforms to the transmission standard of a group of second signals. It has the effect of not restricting forward or reverse plugging of the electrical plug connector 200 and transmission inside the electrical receptacle connector 100 .

Please refer to FIG. 1A, FIG. 1B, Table 1 and FIG. 3A. In this embodiment, from the perspective of the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152, the arrangement positions of the plurality of upper row elastic terminals 151 correspond to Arrangement positions of the plurality of elastic terminals 152 in the lower row.

Referring to Fig. 1 and Fig. 3A, the shielding case 12 is a hollow case, the interior of the shielding case 12 has a receiving groove 12a, the shielding case 12 covers the insulating body 11, that is, the insulating body 11 is fixed in the receiving groove 12a Inside. In this embodiment, the shielding case 12 is composed of a multi-piece frame structure, but it is not limited thereto. In some embodiments, the shielding case 12 can also be formed by bending a one-piece frame structure.

Referring to Fig. 1, Fig. 2, Fig. 3A and Fig. 4, in this embodiment, the rear-end fixing block 21 is installed on the rear side of the insulating body 11, and the rear-end fixing block 21 includes a plurality of through holes 211, buckle parts 22 and at least A glue-filled channel 24 .

A plurality of through holes 211 penetrate from the front side of the rear end fixing block 21 to the rear side, and the rear sides of the aforementioned plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152 are exposed on the rear side of the insulating body 11, and when the rear end When the fixing block 21 is assembled to the rear side of the insulating body 11 , the rear sides of the plurality of upper row elastic terminals 151 and the plurality of lower row elastic terminals 152 respectively pass through the plurality of through holes 211 .

The buckle portion 22 is formed on the front side of the rear-end fixing block 21 , and the buckle portion 22 cooperates with the rear-end docking portion 115 and is engaged and fixed. In this embodiment, the buckle portion 22 is a groove 221 structure, but not limited thereto. Moreover, as mentioned above, the rear end abutting portion 115 is a protrusion 116 , and the protrusion 116 is engaged in the groove 221 . In this embodiment, the buckle portion 22 includes a plurality of guiding slopes 2211 , and the plurality of guiding slopes 2211 are formed on the outer edge of the groove 221 to provide a function of guiding assembly. That is to say, when the buckle portion 22 and the rear abutting portion 115 are assembled with each other, the guide slope 2211 is used to facilitate the protrusion 116 to be assembled into the groove 221 . In addition, in some embodiments, the rear butt joint 115 can be further designed as a buckle groove 117 structure, and the buckle part 22 is further a clamping block 222 (as shown in FIG. 3B ), the size of the clamping block 222 conforms to The size of the buckle groove 117 is such that the locking block 222 is engaged in the buckle groove 117 . That is to say, the buckle part 22 and the rear-end butt joint part 115 can be replaced by a groove or a protrusion structure to achieve the function of combining the concave and convex with each other. In addition, the width of the above-mentioned rear-end butt joint portion 115 is substantially equal to the width of the buckle portion 22. When the buckle portion 22 and the rear-end butt joint portion 115 are assembled with each other, the rear-end butt joint portion 115 can interfere with the buckle portion 22 and tighten tightly. real fixed.

At least one glue filling channel 24 is formed around the rear fixing block 21 , and the glue filling channel 24 penetrates from the front side of the rear fixing block 21 to the rear side of the base 21 . In this embodiment, the back-end fixing block 2 includes a plurality of glue-filling channels 24, and each glue-filling channel 24 is formed on the side walls of both sides of the back-end fixing block 21, and the glue-filling channels 24 form a groove structure 241 and Formed on both sides of the top surface and the bottom surface of the rear end fixing block 21 respectively (that is, at the positions corresponding to the side walls on both sides), that is to say, the two sides of the top surface and the bottom surface of the rear end fixing block 21 The groove structure 241 is formed by recessing on both sides. But not limited thereto, in some embodiments, a plurality of glue filling channels 24 can be further formed on the left sidewall and the right sidewall of the rear fixing block 21 respectively. In addition, the glue filling channel 24 can also further form more than one perforation structure and run through the rear end fixing block 21, that is to say, the setting of the perforation structure can replace the setting of the groove structure 241, and the molding compound can also be provided from one end of the perforation structure. overflow to the other end.

The electrical plug connector 100 further includes a cover, which extends from the rear side of the rear fixing block 21 from the glue filling channel 24 to the outside of the rear side of the shielding shell 12 . The cover covers the plurality of wires, the plurality of upper-row welding sections 1516 and the plurality of lower-row welding sections 1526. Here, after welding the plurality of wires on the circuit board 13, it can be combined and covered by dispensing or overmolding. The molding method of the covering part is to fill the molding rubber from the rear side of the rear fixing block 21 (that is, the surface position of the circuit board 13), so that the molding rubber overflows from the filling channel 24 to the back of the shielding shell 12 The outside of the side is used to protect the plurality of wires after welding, the plurality of upper row welding sections 1516 and the plurality of lower row welding sections 1526 after the molding rubber is shaped. In addition, the insulating shell 41 is molded by over molding, and the insulating shell 41 is used to cover the covering member, so as to complete the electrical plug connector 100 with transmission wires. When the electrical plug connector 100 is processed to cover a cover, the cover can be used to cover multiple wires or multiple upper welding sections 1516 and multiple lower welding sections 1526, so as to avoid multiple wires, The plurality of upper row welded sections 1516 or the plurality of lower row welded sections 1526 are deflected, shifted or deformed due to impact.

Referring to Fig. 1 and Fig. 5, the circuit board 13 is positioned at the rear side of the rear end fixing block 21, and the circuit board 13 has a plurality of contacts 131, which are respectively a plurality of ground contacts 131 and a plurality of terminal contacts 132, and the plurality of ground contacts 131 and the plurality of terminal contacts 132 are located at On one side of the circuit board 13 , the plurality of ground contacts 131 are located on two sides of the plurality of terminal contacts 132 . The plurality of upper row welding sections 1516 and the plurality of lower row welding sections 1526 are respectively welded on the plurality of terminal contacts 132 .

1 and 2, the electrical plug connector 100 further includes a grounding terminal 14, which is formed by blanking, but not limited thereto. In some embodiments, the grounding terminal 14 can be stamped and formed. become. The structural strength of the ground terminal 14 formed by blanking is better than that of the stamped ground terminal 14 . The ground terminal 14 is disposed on the insulating body 11 and contacts the shielding shell 12 . The ground terminal 14 includes a plurality of side arms, a plurality of hooks and a plurality of pins. Each of the plurality of side arms is a long and narrow terminal, and each side arm is fitted into the grooves on both sides of the insulating body 11 . Each hook portion extends from the front side of each side arm toward the slot 113 , and each hook portion extends into each slot 113 . Each pin extends from the rear side of each side arm. Each pin passes through the rear end of the groove to expose the outside of the insulating body 11 . The pin extends to the circuit board 13 and is soldered to the ground contact 131 .

When the electrical plug connector 100 is plugged into the electrical socket connector, the multiple hooks of the grounding terminal 14 of the electrical plug connector 100 will buckle the hooks of the electrical socket connector, thereby avoiding the multiple hooks of the electrical plug connector 100 The part rubs against both sides of the tongue plate of the socket electrical connector and causes the wear of the tongue plate. In addition, the exposed terminal pins of the electrical socket connector are connected to the shielding shell, so that the grounding terminal of the electrical socket connector itself can conduct conduction and be grounded.

In the utility model, the butt joint part of the rear end of the insulating main body and the buckle part of the rear end fixing block utilize the concave-convex design and the size to cooperate with each other to strengthen the fixing effect between the two, and prevent the insulating main body from being fixed to the rear end when the insulating main body is subjected to a bending test. The blocks are bent and separated from each other, which causes the upper row of welding sections of the plurality of upper rows of elastic terminals and the lower row of welding sections of the plurality of lower rows of elastic terminals to detach from the plurality of through holes of the rear-end fixing block, effectively improving the insulation between the main body and the rear. The connection function between the end fixing blocks and the overall strength of the plug electrical connector. In addition, the plurality of upper-row elastic terminals and the plurality of lower-row elastic terminals of the plug electrical connector are upside down, and the arrangement of the plurality of upper-row contact segments is opposite to the arrangement of the plurality of lower-row contact segments, providing a plug electrical connector. When it is plugged into the socket electrical connector, the plurality of upper contact segments of the plug electrical connector can be connected with the plurality of upper row terminals of the socket electrical connector, and the plug electrical connector is reversely plugged into the socket electrical connector When inside, the plurality of lower contact segments of the plug electrical connector can also be connected with the plurality of upper row terminals of the socket electrical connector. The plug electrical connector has the function of not restricting the forward or reverse insertion of the socket electrical connector .

Claims (10)

1. A plug electrical connector, comprising: a shielding shell, an insulating body, a plurality of upper elastic terminals, a plurality of lower elastic terminals and a rear end fixing block, characterized in that: The shielding case includes a receiving slot; The insulating main body is located in the receiving groove, the insulating main body includes an upper board body, a lower board body, a slot and a rear end butt joint, the slot is located between the upper board body and the lower board body, The slot is formed on the front side of the insulating body, and the rear end butt joint is formed on the rear side of the insulating body; The plurality of upper-row elastic terminals, these upper-row elastic terminals include a plurality of upper-row elastic signal terminals, at least one upper-row elastic power terminal and at least one upper-row elastic ground terminal, and each of the upper-row elastic terminals is arranged on the insulating body and located on the lower surface of the upper plate body; The plurality of lower-row elastic terminals, these lower-row elastic terminals include a plurality of lower-row elastic signal terminals, at least one lower row of elastic power terminals, and at least one lower row of elastic ground terminals, and each of the lower-row elastic terminals is arranged on the insulating body and located at the upper surface of the lower plate; and The rear-end fixing block is installed on the rear side of the insulating body, and the rear-end fixing block includes: A plurality of perforations, the perforations penetrate from the front side to the rear side of the rear end fixing block, and the rear sides of the upper row of elastic terminals and the rear sides of the lower row of elastic terminals pass through the perforations respectively; and A buckle part, the buckle part is formed on the front side of the rear end fixing block, and the buckle part matches with the rear end butt joint part and is fastened and fixed. 2 . The electrical plug connector as claimed in claim 1 , wherein the rear butt joint portion is a protrusion, the locking portion is a groove, and the protrusion is engaged in the groove. 3 . 3 . The electrical plug connector as claimed in claim 2 , wherein the locking portion comprises a plurality of guiding slopes, and the guiding slopes are formed on the outer edge of the groove. 4 . 4. The electrical plug connector according to claim 1, wherein the butt joint portion at the rear end is a buckle groove, and the buckle portion is a clamping block, and the clamping block is engaged with the inside of the buckle groove . 5 . The electrical plug connector as claimed in claim 1 , wherein a width of the rear butt joint portion is substantially equal to a width of the buckle portion so that the rear butt joint portion interferes with the buckle portion. 6 . 6. The electrical plug connector according to claim 1, further comprising a circuit board, the circuit board is mounted on the rear side of the rear end fixing block, the circuit board includes a plurality of grounding contacts, and the grounding contacts are connected to on the rear side of the upper row of elastic terminals and the rear side of the lower row of elastic terminals. 7. The electrical plug connector according to claim 1, wherein the upper row of elastic terminals includes an upper row of contact sections, an upper row of connecting sections and an upper row of welding sections, and the upper row of connecting sections is arranged on the The upper plate body, the upper row of contact sections extending from one side of the upper row of connecting sections and located on the lower surface of the upper plate body, the upper row of welding sections extending from the other side of the upper row of connecting sections and passing through the insulating body . 8. The plug electrical connector according to claim 1, wherein the lower row of elastic terminals includes a lower row of contact sections, a lower row of connecting sections and a lower row of welding sections, and the lower row of connecting sections is arranged on the lower plate body The lower row of contact sections extends from one side of the lower row of connecting sections and is located on the upper surface of the lower plate body, and the lower row of welding sections extends from the other side of the lower row of connecting sections and passes through the insulating body. 9. The electrical plug connector according to claim 1, wherein the upper row of shrapnel signal terminals are located on the upper surface to transmit a set of first signals, and the lower row of shrapnel signal terminals are located on the lower surface to transmit a set of first signals. A group of second signals, the transmission specification of the group of first signals conforms to the transmission specification of the group of second signals, the upper row of shrapnel terminals and the lower row of shrapnel terminals are symmetrical to each other with the center point of the receiving slot as a symmetrical center Point symmetry. 10. The electrical plug connector according to claim 9, wherein the arrangement position of the upper row of elastic terminals corresponds to the arrangement position of the lower row of elastic terminals.