CN220692432U - Plug electric connector for vehicle and socket electric connector for vehicle - Google Patents

Abstract

The utility model relates to a vehicular plug electric connector and a vehicular socket electric connector matched with the same. The electric connector for the vehicle socket comprises a socket module and a butt joint shell covered on the socket module. The butt-joint shell is provided with a main body and a clamping hook structure, the butt-joint shell is provided with a main body and a buckling groove structure, and the main body is inserted into a slot of the main body and enables the clamping hook structure to be buckled with the buckling groove structure. The vehicle plug electric connector with the clamping part is matched and spliced with the vehicle socket electric connector with the limiting part, and the plug module and the socket module which are spliced are compatible with USB association communication protocols.

Description

Plug electric connector for vehicle and socket electric connector for vehicle

Technical Field

The present utility model relates to an electrical connector, and more particularly to a plug electrical connector and a socket electrical connector for a vehicle.

Background

Electrical connectors are used in electrical products for the conduction of power or signals, and are widely used for the connection of information products. The use of electrical connectors is also widely used in automotive and locomotive circuit systems for connecting lines. To ensure that the contact terminals inside the electrical connector are securely positioned and locked.

The plug and socket electric connector for general vehicles comprises a butt joint frame body and a coaxial connector arranged in the butt joint frame body. The coaxial connector has low transmission speed for transmitting high-frequency signals, and the transmission signals are not compatible with USB association communication protocols.

Disclosure of Invention

In view of the foregoing, an embodiment of the present utility model provides a plug electrical connector for a vehicle, which includes a plug module and a docking housing. The butt-joint shell covers the plug module, and the butt-joint shell has main part and pothook structure, and the main part has a plurality of lateral surfaces and surface, and two opposite lateral surfaces are located the both sides of main part, and the surface is located between two opposite lateral surfaces, and pothook structure outwards extends from the surface, and two at least lateral surfaces of main part have the clamping portion.

Preferably, the number of the clamping parts on the main body is three, the first clamping part is independently positioned on the first outer side surface of the main body, the other two clamping parts are positioned on the second outer side surface of the main body, and the first outer side surface and the second outer side surface are positioned on the opposite two sides of the main body.

Preferably, the two opposite outer sides of the main body are provided asymmetrically, and the number of the clamping parts on the two outer sides of the main body is different.

Preferably, the two opposite outer sides of the main body are symmetrically provided with the clamping parts, and the number of the clamping parts positioned on the two outer sides of the main body is the same.

Preferably, the hook structure has a spring arm, a hook portion at the top of the spring arm, and a pressing portion at the end of the spring arm.

Preferably, the body has a plurality of arcuate projections, each arcuate projection being located on opposite outer sides and surfaces.

Preferably, the main body is provided with a plug end and an inner concave part, the inner concave part is positioned between the side edge and the outer side surface of the plug end, the main body is provided with a protruding structure positioned on the outer side surface, and the inner concave part is positioned at the front end of the protruding structure.

Preferably, the main body is provided with a plug end and a plurality of concave parts, each concave part is respectively positioned between two sides of the plug end and each outer side surface, the main body is provided with a protruding structure positioned on the outer side surface, and the concave parts are positioned at the front ends of the protruding structures.

Preferably, the first total width of the plug end is smaller than the second total width between the opposite outer sides of the body.

An embodiment of the utility model also provides an electrical connector for a vehicle socket, which comprises a socket module and a butting shell. The butt-joint shell covers the socket module and is provided with a body and a buckling groove structure positioned on the body, the body is provided with a slot, the buckling groove structure is communicated with the slot, and the butt-joint shell comprises limit parts positioned on at least two inner sides of the slot.

Preferably, the vehicle socket electric connector further comprises a shielding shell, and the shielding shell covers two sides and the rear of the butting shell.

Preferably, the docking housing includes a plurality of arcuate recesses on an inner side of the slot.

According to some embodiments, the plug electric connector with the clamping part for the vehicle and the socket electric connector with the limiting part for the vehicle are provided for matching and plugging, and the plug module and the socket module which are plugged are compatible with USB association communication protocols, so that the portable equipment can be conveniently led in. In addition, the clamping part and the limiting part can be selected in different styles according to different equipment, so that equipment damage caused by misplug is prevented.

Drawings

Fig. 1 is a schematic diagram showing an external view of a vehicle plug electrical connector and a vehicle socket electrical connector before being plugged in according to some embodiments.

FIG. 2A is a schematic side cross-sectional view of a vehicle plug electrical connector and a vehicle receptacle electrical connector before mating, according to some embodiments.

FIG. 2B is a schematic perspective cross-sectional view of the docking housing and docking shell before they are plugged, according to some embodiments.

Fig. 3 is a schematic diagram showing an external view of the electrical connector for vehicle plug and the electrical connector for vehicle socket according to some embodiments.

FIG. 4A is a schematic side cross-sectional view of a vehicular plug electrical connector mated with a vehicular receptacle electrical connector, according to some embodiments.

FIG. 4B is a schematic perspective cross-sectional view of the docking housing after being plugged with the docking shell, according to some embodiments.

Fig. 5 is a schematic front cross-sectional view of a vehicle plug electrical connector mated with a vehicle receptacle electrical connector, according to some embodiments.

Fig. 6A is a schematic front view of a plug electrical connector for a vehicle, showing a first style of a detent portion of a mating housing according to some embodiments.

Fig. 6B is a schematic front view of a plug electrical connector for a vehicle according to some embodiments, showing a second style of the locking portion of the mating housing.

Fig. 6C is a schematic front view of a plug electrical connector for a vehicle, showing a third style of the locking portion of the mating housing according to some embodiments.

Fig. 6D is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a fourth style of the locking portion of the mating housing.

Fig. 6E is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a fifth style of the locking portion of the mating housing.

Fig. 6F is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a sixth style of the locking portion of the mating housing.

Fig. 6G is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a seventh style of the engaging portion of the mating housing.

Fig. 6H is a schematic front view of an electrical connector for a vehicle plug according to some embodiments, showing a style eight of the locking portion of the mating housing.

Fig. 7 is a front view of an electrical connector for a vehicle socket, showing a style of the limiting portion of the docking housing, according to some embodiments.

FIG. 8A is a schematic diagram illustrating the appearance of the top view of the docking housing, according to some embodiments.

FIG. 8B is a schematic diagram illustrating the appearance of the docking housing from a lower perspective, in accordance with some embodiments.

FIG. 8C illustrates a top view of a docking housing, in accordance with some embodiments.

Fig. 9A is a front view of a docking housing, with opposite sides of the body having recesses, according to some embodiments.

Fig. 9B is a front view of the docking housing, showing one of the opposite sides of the main body having a recess, according to some embodiments.

Fig. 10A is a schematic front view of a plug electrical connector for a vehicle according to some embodiments, showing a first style of a detent portion of a mating housing, and a state having a concave portion.

Fig. 10B is a schematic front view of a plug electrical connector for a vehicle according to some embodiments, showing a second style of the locking portion of the mating housing, and having a concave portion.

Fig. 10C is a schematic front view of a plug electrical connector for a vehicle according to some embodiments, showing a third style of the locking portion of the mating housing, and having a concave portion.

Fig. 10D is a front view of a plug electrical connector for a vehicle according to some embodiments, showing a fourth style of the locking portion of the mating housing, and having a concave portion.

Fig. 10E is a front view of a plug electrical connector for a vehicle according to some embodiments, showing a fifth style of the locking portion of the mating housing, and having a concave portion.

Fig. 10F is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a sixth style of the engaging portion of the mating housing, and having a concave portion.

Fig. 10G is a front view of an electrical connector for a vehicle plug according to some embodiments, showing a seventh style of the engaging portion of the mating housing, with a concave portion.

Symbol description

100 plug electric connector for vehicle

200 socket electric connector for vehicle

1 plug module

2 Butt joint outer shell

21 main body

21a plug-in head

21b concave portion

211 outer side surface

212 surface

22 hook structure

221 spring arm

222 hook portion

223 pressing part

24 clamping part

25 arc convex part

26 protruding structure

3 socket module

4 Butt joint shell

41 body

41a slot

411 inner side surface

42 buckle groove structure

44 spacing part

45 arc recess

5 shielding shell

a1, a2, a3 axis

D1, D2 width

W1', W1' ' first total width

W2 second total width

L is depth.

Detailed Description

Referring to fig. 1 and 2A, fig. 1 is a schematic view of an external view of a plug electrical connector 100 for a vehicle and a socket electrical connector 200 for a vehicle before plugging, and fig. 2A is a schematic side view of the plug electrical connector 100 for a vehicle and the socket electrical connector 200 for a vehicle before plugging. An embodiment of the vehicular plug electrical connector 100 and the vehicular receptacle electrical connector 200. The transmission interface between the plug electrical connector 100 and the socket electrical connector 200 is a universal serial bus (Universal Serial Bus, abbreviated as USB). Preferably, the plug electrical connector 100 and the socket electrical connector 200 are in accordance with USB Type-C connection interface specification.

Referring to fig. 1, 2A and 2B, fig. 2B is a schematic perspective cross-sectional view of the docking housing 2 and the docking housing 4 before they are not plugged. The plug electrical connector 100 for a vehicle includes a plug module 1 and a mating housing 2. The docking housing 2 covers the plug module 1, the docking housing 2 has a main body 21 and a hook structure 22, the main body 21 has a plurality of outer side surfaces 211 and a surface 212, the two opposite outer side surfaces 211 are located at two sides of the main body 21, the surface 212 is located between the two opposite outer side surfaces 211, the hook structure 22 extends outwards from the surface 212, and at least two outer side surfaces 211 of the main body 21 have a hook portion 24.

Referring to fig. 1, 2A and 2B, the electrical connector 200 for a vehicle socket includes a socket module 3 and a docking housing 4. The docking housing 4 covers the socket module 3, the docking housing 4 has a main body 41 and a buckling groove structure 42 located on the main body 41, the main body 41 has a slot 41a, the buckling groove structure 42 is communicated with the slot 41a, and the docking housing 4 includes a limiting portion 44 located on at least two inner sides 411 of the slot 41 a.

Referring to fig. 3, 4A and 4B, fig. 3 is a schematic external view of the plug electrical connector 100 for a vehicle and the socket electrical connector 200 for a vehicle, fig. 4A is a schematic side sectional view of the plug electrical connector 100 for a vehicle and the socket electrical connector 200 for a vehicle, and fig. 4B is a schematic perspective sectional view of the docking housing 2 and the docking housing 4 after being plugged. Preferably, to plug the electrical connector 100 into the electrical connector 200, the end of the plug module 1 exposed out of the docking housing 2 is aligned and inserted into the slot 41a of the docking housing 4, so that the plug module 1 is electrically connected to the socket module 3. Meanwhile, the hook structure 22 of the plug electrical connector 100 elastically engages the slot structure 42 of the socket electrical connector 200. When the plug electrical connector 100 is separated from the socket electrical connector 200, the hook structure 22 is pressed to separate the hook structure 22 from the latch structure 42, so that the plug electrical connector 100 and the socket electrical connector 200 can be detached.

Referring to fig. 2A and 4A, preferably, the plug module 1 is of USB Type-C connection interface specification, the plug module 1 has a structure of Type-C plug electrical connector, the socket module 3 is of USB Type-C connection interface specification, and the socket module 3 has a structure of Type-C socket electrical connector.

Referring to fig. 1 to 4B, the hook structure 22 of the plug electrical connector 100 for a vehicle preferably has a latch arm 221, a hook portion 222 located at the top of the latch arm 221, and a pressing portion 223 located at the end of the latch arm 221. When the user presses the pressing portion 223, the spring arm 221 is driven to swing, so that the hook portion 222 is separated from the buckle groove structure 42. When the hook 222 is fastened to the slot structure 42, the hook is prevented from being loosened by vibration or external force. Preferably, the buckle slot structure 42 of the electrical connector 200 has a plurality of insertion slots with different lengths and widths, the shape of the insertion slots corresponds to the shape of the spring arms 221 and the hook portions 222, so that the spring arms 221 can guide the insertion slots to be abutted.

Referring to fig. 5, fig. 5 is a schematic front cross-sectional view of the electrical vehicle plug connector 100 after plugging with the electrical vehicle receptacle connector 200. Preferably, the width D1 of the main body 21 of the plug electrical connector 100 for vehicles is 12.15mm (or between 11.15mm and 13.15 mm), and the width D1 of the main body 21 is specially designed to cover the plug module 1 of the Type-C connection interface. The body 41 of the electrical connector 200 is also widened to provide the body 21 for plugging into the slot 41a of the body 41 for connection.

Referring to fig. 1 and 5, each of the locking portions 24 and each of the limiting portions 44 are corresponding protrusions and grooves (each of the locking portions 24 may be a groove, each of the limiting portions 44 may be a protrusion, or each of the locking portions 24 may be a protrusion, each of the limiting portions 44 may be a groove), but not limited thereto. Preferably, the shape of each bump and each groove may be rectangular, trapezoidal, semicircular or triangular, and the lengths of each bump and each groove may be the same or different.

Referring to fig. 1 and 5, the body 21 of the plug electrical connector 100 for vehicles preferably has a plurality of arcuate projections 25, each arcuate projection 25 being located on opposite outer side surfaces 211 and surfaces 212. The mating housing 4 of the electrical receptacle connector 200 for a vehicle includes a plurality of arcuate recesses 45 on the inner side 411 of the slot 41 a. Each arc concave part 45 is respectively clamped with each arc convex part 25, and the circle center of each arc concave part 45 and the circle center of each arc convex part 25 are at different positions.

As shown in fig. 1 and 5, preferably, the first axis X is the X axis of the three-dimensional coordinate system, the second axis Y is the Y axis of the three-dimensional coordinate system, and the third axis Z is the Z axis of the three-dimensional coordinate system. The third axis Z is non-parallel to the first and second axes X and Y, which are substantially perpendicular to the third axis Z.

Referring to fig. 1 and 5, the engaging portions 24 on two opposite outer sides 211 of the main body 21 of the plug electrical connector 100 for vehicles are preferably symmetrically disposed or asymmetrically disposed. Asymmetric arrangement: the number of the locking portions 24 on the two outer sides 211 of the main body 21 is different (e.g., three locking portions 24 in fig. 6A, one locking portion 24 in fig. 6E), and the locking portions 24 in fig. 6A to 6D are disposed on different axes a1, a2, a3, and the axes a1, a2, a3 are the same as the X axis and correspond to the centers of the locking portions 24.

Referring to fig. 6A, fig. 6A is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the electrical connector 100 is three, the first latching portion 24 is separately located on a first outer side 211 (right side of the mating housing 2 in fig. 6A) of the main body 21, and the other two latching portions 24 are located on a second outer side 211 (left side of the mating housing 2 in fig. 6A) of the main body 21, and the first outer side 211 and the second outer side 211 are located on opposite sides of the main body 21, not limited thereto.

Referring to fig. 6B, fig. 6B is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the electrical connector 100 is three, the first latching portion 24 is located on a first outer side 211 (left side of the mating housing 2 in fig. 6B) of the main body 21, the other two latching portions 24 are located on a second outer side 211 (right side of the mating housing 2 in fig. 6B) of the main body 21, and the first outer side 211 and the second outer side 211 are located on opposite sides of the main body 21.

Referring to fig. 6C, fig. 6C is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the electrical connector 100 is three, the first latching portion 24 is located on a first outer side 211 (left side of the mating housing 2 in fig. 6C) of the main body 21, the other two latching portions 24 are located on a second outer side 211 (right side of the mating housing 2 in fig. 6C) of the main body 21, and the first outer side 211 and the second outer side 211 are located on opposite sides of the main body 21.

Referring to fig. 6D, fig. 6D is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the electrical connector 100 is three, the first latching portion 24 is located on a first outer side 211 (right side of the mating housing 2 in fig. 6D) of the main body 21, the other two latching portions 24 are located on a second outer side 211 (left side of the mating housing 2 in fig. 6D) of the main body 21, and the first outer side 211 and the second outer side 211 are located on opposite sides of the main body 21.

Referring to fig. 6E, fig. 6E is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the plug electrical connector 100 for a vehicle is one, and the latching portions 24 are located on the outer side 211 of the main body 21 (the right side of the mating housing 2 in fig. 6E).

Referring to fig. 6F, fig. 6F is a schematic front view of the vehicular plug electrical connector 100. Preferably, the number of the latching portions 24 on the main body 21 of the plug electrical connector 100 for a vehicle is one, and the latching portions 24 are located on the outer side 211 of the main body 21 (the left side of the mating housing 2 in fig. 6F).

Referring to fig. 6G, fig. 6G is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the number of the latching portions 24 on the main body 21 of the plug electrical connector 100 for a vehicle is plural, the plurality of latching portions 24 are located on a first outer side 211 (left side of the mating housing 2 in fig. 6G) of the main body 21, and the plurality of latching portions 24 are located on a second outer side 211 (right side of the mating housing 2 in fig. 6G) of the main body 21.

Referring to fig. 1 and 6G, preferably, the engaging portions 24 on two opposite outer sides 211 of the main body 21 of the plug electrical connector 100 for vehicles are symmetrically disposed, the number of the engaging portions 24 on two outer sides 211 of the main body 21 is the same, the engaging portions are on the same axes a1 and a2 (or different axes a1 and a 2), and the axes a1 and a2 are the same axial direction as the X axis.

Referring to fig. 5 and 7, fig. 7 is a front view of the electrical connector 200 for a vehicle. Preferably, the shape in the slot 41a of the vehicular receptacle electrical connector 200 conforms to the shape of the main body 21 of the vehicular plug electrical connector 100. The electrical receptacle connector 200 of fig. 7 is mated with the electrical plug connector 100 of fig. 6A, and the electrical receptacle connector 200 has other designs that can be mated with the electrical plug connector 100 of fig. 6B-6G, respectively.

Preferably, in fig. 5, the inner shape of the slot 41a conforms to the appearance of the main body 21, and the inner side 411 (the inner contour line of the two-point chain line) of the slot 41a conforms to the outer contour line of the main body 21, so that the main body 21 can be more firmly limited when being inserted into the slot 41 a. Preferably, each of the limiting portions 44 of the electrical connector 200 corresponds to each of the locking portions 24 of the electrical connector 100, and the shape and the number and the positions of each of the limiting portions 44 and the shape and the number and the positions of each of the locking portions 24 correspond to each other, but not limited thereto.

Referring to fig. 6H, fig. 6H is a schematic front view of the plug electrical connector 100 for a vehicle. Preferably, the body 21 of the vehicle plug electrical connector 100 does not have the engaging portion 24 shown in fig. 5, so that the width D2 of the body 21 is reduced, so that the body 21 of the docking housing 2 does not collide with the limiting portion 44 in the slot 41a of the docking housing 4, so that the body 21 of the docking housing 2 can be plugged into the slots 41a of the docking housing 4, and the plug module 1 and the socket module 3 are electrically connected, thereby achieving the purpose that the vehicle plug electrical connector 100 is commonly used for various vehicle socket electrical connectors 200.

Referring to fig. 1, 2A and 4A, the electrical connector 200 for a vehicle preferably further includes a shielding housing 5 covering both sides and the rear of the mating housing 4. The shielding housing 5 effectively prevents the electromagnetic interference (Electromagnetic Interference, abbreviated as EMI) and the radio frequency interference (Radio Frequency Interference, abbreviated as RFI) generated when the terminals of the plug module 1 and the socket module 3 transmit signals from leaking to the outside.

Referring to fig. 8A, 8B and 9A, fig. 8A is a schematic view of the upper view of the docking housing 2, fig. 8B is a schematic view of the lower view of the docking housing 2, and fig. 9A is a schematic view of the front view of the docking housing 2, wherein the opposite sides of the main body 21 have concave portions 21B. Preferably, the main body 21 has a plug end 21a and a plurality of concave portions 21b, and each concave portion 21b is located at a corner between two sides of the plug end 21a and each outer side 211. The main body 21 has a protruding structure 26 on the outer side 211, and the concave portion 21b is located at the front end of the protruding structure 26. In some embodiments, the first total width W1' of the plug end 21a is smaller than the second total width W2 between the opposite outer sides 211 of the main body 21.

Referring to fig. 8C, fig. 8C is a schematic top view of the docking housing 2. In some embodiments, the unfilled corner structures with vertical (or inclined) concave portions 21b are respectively located at the corners between the two sides of the plug end 21a and the outer side 211.

By providing the concave portion 21b on the side of the plug end 21a, the first total width W1' (as shown in fig. 9A) of the plug end 21a is reduced. When the docking housing 2 is plugged with the docking housing 4, the plug end 21a is easy to align with the opening of the insertion slot 41a because the first total width W1' of the plug end 21a is smaller than the opening width of the insertion slot 41a, thereby providing an effect of facilitating alignment and plugging. Then, because the plug end 21a is in the opening of the slot 41a, the user pushes the plug end 21a to plug with the docking housing 4, i.e. the docking housing 2 is inserted into the slot 41a and the locking portion 24 is combined with the limiting portion 44.

In some embodiments, the depth L of the fillet 21b (shown in fig. 8C) is between 0.6 mm and 1.4 mm, 0.8 mm, 1 mm, or 1.2 mm. The first total width W1' is between 10.5 mm and 11.3 mm, 10.7 mm, 10.9 mm or 11.1 mm. The second total width W2 is between 11.7 mm and 12.5 mm, 11.9 mm, 12.1 mm or 12.3 mm.

Referring to fig. 9B, fig. 9B is a front view schematically showing the docking housing 2, in a state in which one of opposite sides of the main body 21 has an inner concave portion 21B. In some embodiments, the main body 21 has a plug end 21a and an inner recess 21B, wherein the inner recess 21B is located at a corner between one side (right side as shown in fig. 9B and 10E, left side as shown in fig. 10F) of the plug end 21a and the corresponding outer side 211. The main body 21 has a protruding structure 26 on the outer side 211, and the concave portion 21b is located at the front end of the protruding structure 26. In some embodiments, the first total width W1″ of the plug end 21a is smaller than the second total width W2 between the opposite outer sides 211 of the main body 21.

Referring to fig. 9B, in some embodiments, one outer side 211 of the main body 21 has a protruding structure 26 (with a detent 24), that is, has an inner recess 21B, and the other outer side 211 of the main body 21 has no protruding structure 26 (without a detent 24), that is, has no inner recess 21B. The pattern of the detent portion 24 shown in fig. 9A is similar to the pattern of the detent portion 24 shown in fig. 6A, the pattern of the detent portion 24 shown in fig. 9B is similar to the pattern of the detent portion 24 shown in fig. 6E, and the arrangement of the concave portion 21B is applicable to the detent portions 24 (having the protruding structures 26) shown in fig. 10A to 10G, and the detent portions 24 shown in fig. 10A to 10G are respectively identical to the detent portions 24 shown in fig. 6A to 6G. In summary, according to some embodiments, a plug electrical connector for a vehicle having a locking portion and a socket electrical connector for a vehicle having a limiting portion are provided to be plugged together, and the plug module and the socket module plugged together are compatible with USB association communication protocol, so as to facilitate the introduction of portable devices. In addition, the clamping part and the limiting part can be selected in different styles according to different equipment, so that equipment damage caused by misplug is prevented.

Claims (12)

1. A plug electrical connector for a vehicle, characterized by:

a plug module; and

the butt joint shell is covered on the plug module and is provided with a main body and a clamping hook structure, the main body is provided with a plurality of outer side surfaces and a surface, two opposite outer side surfaces are positioned on two sides of the main body, the surface is positioned between the two opposite outer side surfaces, the clamping hook structure extends outwards from the surface, and at least two outer side surfaces of the main body are provided with a clamping part.

2. The plug electrical connector of claim 1, wherein the number of said latching portions on said body is three, a first one of said latching portions being located on a first one of said outer sides of said body, and two of said latching portions being located on a second one of said outer sides of said body, said first and second ones of said outer sides being located on opposite sides of said body.

3. The electrical plug connector of claim 1, wherein the engaging portions of the two opposite outer sides of the main body are asymmetrically disposed, and the number of engaging portions of the two outer sides of the main body is different.

4. The electrical plug connector of claim 1, wherein the engaging portions of the two opposite outer sides of the main body are symmetrically disposed, and the number of engaging portions of the two outer sides of the main body is the same.

5. The electrical plug connector of claim 1, wherein the hook structure comprises a latch arm, a hook portion at a top of the latch arm, and a pressing portion at a distal end of the latch arm.

6. The plug electrical connector of claim 1, wherein said body has a plurality of arcuate projections, each of said arcuate projections being located on opposite ones of said outer side and said surface.

7. The plug electrical connector of claim 1, wherein the body has a plug end and an inner recess, the inner recess being located between a side of the plug end and the outer side, the body having a protrusion located on the outer side, the inner recess being located at a front end of the protrusion.

8. The plug electrical connector of claim 1, wherein the body has a plug end and a plurality of recesses, each recess being located between two sides of the plug end and each of the outer sides, the body having a protrusion structure located on the outer side, the recess being located at a front end of the protrusion structure.

9. The electrical plug connector of claim 8, wherein a first total width of the plug end is smaller than a second total width between the opposite outer side surfaces of the body.

10. An automobile-used socket electric connector for peg graft an automobile-used plug electric connector, this automobile-used socket electric connector, its characterized in that:

a socket module; and

the butt joint shell covers the socket module, the butt joint shell is provided with a body and a buckling groove structure positioned on the body, the body is provided with a slot, the buckling groove structure is communicated with the slot, the butt joint shell comprises a limiting part positioned on at least two inner side surfaces of the slot, and the vehicular plug electric connector with a clamping part is matched and spliced with the vehicular socket electric connector with the limiting part.

11. The electrical receptacle connector of claim 10, further comprising a shielding housing covering both sides and the rear of the mating housing.

12. The electrical receptacle connector of claim 10, wherein said mating housing includes a plurality of arcuate recesses on said inner side of said slot.