Charging socket for vehicle

Abstract

The embodiment of the present invention provides a charging socket for a vehicle, by providing a through hole at the bottom of the terminal, providing a combination hole at the bottom of the terminal housing, and a fixing member passing through the through hole and cooperating with the combination hole, so that the terminal and the main body can be detachably connected through the fixing member. By using a detachable terminal structure, the maintenance cost and maintenance time can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment, and in particular to a charging socket for a vehicle. Background Art

[0002] The charging socket is an important part of electric vehicles. When the socket of an electric vehicle is damaged or reaches the end of its plug-in life, the entire socket wiring harness needs to be replaced to achieve the repair effect, which will result in high repair costs and long maintenance time. Therefore, a new type of charging socket is needed to reduce repair costs and repair time. Summary of the invention

[0003] In view of this, the present invention provides a charging socket for a vehicle, which can reduce maintenance costs and maintenance time by using a structure with detachable terminals.

[0004] An embodiment of the present invention provides a charging socket for a vehicle, the charging socket for a vehicle comprising:

[0005] A main body; a terminal housing, which is detachably assembled in the main body, including a housing cavity, and a connecting hole is provided at the bottom of the housing cavity; a terminal, which is partially arranged in the housing cavity, including a bottom with a through hole, and the through hole and the connecting hole are correspondingly arranged; a fixing piece, which passes through the through hole and cooperates with the connecting hole to make the terminal and the main body detachably connected; and an anti-loosening spring, which is arranged in the terminal and located on one side of the fixing piece, and the anti-loosening spring is used to limit the fixing piece.

[0006] Preferably, the terminal comprises: an inner shell, comprising a cylindrical side wall, a first card slot is arranged in the side wall of the inner shell, and the first card slot is lower than the upper surface of the fixing member;

[0007] The anti-loosening spring is interference-fitted with the first clamping groove.

[0008] Preferably, the anti-loosening spring has a bending limiting portion.

[0009] Preferably, the bending limiting portion corresponds to one side of the fixing member, and the bending limiting portion presses against the fixing member.

[0010] Preferably, the bending limiting portion corresponds to one side of the fixing member and is spaced apart from the fixing member.

[0011] Preferably, the bottom of the accommodating cavity has a positioning ring protruding inwardly, and the bottom of the inner shell is provided with a positioning boss cooperating with the positioning ring toward the outside.

[0012] Preferably, a second slot is provided in the side wall of the inner shell: the terminal further comprises:

[0013] The rotating spring is arranged in the second clamping groove.

[0014] Preferably, the rotating spring includes: a first connecting ring; a second connecting ring; and a spring sheet, whose two ends are respectively fixedly connected to the first connecting ring and the second connecting ring, the spring sheet is a strip with a middle portion concave inward, the spring sheet has a predetermined angle with the axial direction, and a plurality of the spring sheets are arranged at intervals.

[0015] Preferably, the outer diameter of the first connecting ring is larger than the inner diameter of the inner shell and smaller than the inner diameter of the second slot, and the second connecting ring has the same size as the first connecting ring.

[0016] Preferably, the vehicle charging socket further comprises: a conductive ring spring, which is arranged between the inner shell and the terminal shell and is electrically connected to the inner shell and the terminal shell respectively.

[0017] Preferably, the conductive ring spring is in the shape of a spiral ring.

[0018] Preferably, a plurality of conductive ring springs are arranged at intervals on the inner peripheral wall of the accommodating cavity along the axial direction of the terminal, and are electrically connected to the rotary spring.

[0019] Preferably, the inner peripheral wall of the accommodating cavity comprises an annular fixing groove, and the conductive ring spring is arranged in an accommodating space surrounded by the fixing groove and the side wall of the inner shell; wherein the conductive ring spring is interference fit with the accommodating space.

[0020] Preferably, the vehicle charging socket further comprises: an anti-tentacle protection cap having a center hole, fixedly connected to the upper end of the terminal.

[0021] The embodiment of the present invention provides a charging socket for a vehicle, by providing a through hole at the bottom of the terminal, providing a combination hole at the bottom of the terminal housing, and a fixing member passing through the through hole and cooperating with the combination hole, so that the terminal and the main body can be detachably connected through the fixing member. By using a detachable terminal structure, the maintenance cost and maintenance time can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0023] Figure 1 is an exploded view of a vehicle charging socket according to an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of a vehicle charging socket according to an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of a main body of a vehicle charging socket according to an embodiment of the present invention;

[0026] Figure 4 is a structural schematic diagram of a first part of a main body of a vehicle charging socket according to an embodiment of the present invention;

[0027] Figure 5 is a structural schematic diagram of the second part of the main body of the vehicle charging socket according to an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of a terminal housing and a terminal of a vehicle charging socket according to an embodiment of the present invention;

[0029] Figure 7 yes Figure 6 A top view of

[0030] Figure 8 is along Figure 7 Sectional view along line AA;

[0031] Figure 9-11 Different implementations of the present invention are Figure 8 A magnified view of the middle area 100;

[0032] Fig.12 is a schematic diagram of an anti-loosening spring of a vehicle charging socket according to an embodiment of the present invention;

[0033] Fig.13 is a cross-sectional view of an inner shell of a vehicle charging socket according to an embodiment of the present invention;

[0034] Fig.14 is a cross-sectional view of a terminal housing according to an embodiment of the present invention;

[0035] Fig.15 is a schematic diagram of a rotary spring according to an embodiment of the present invention;

[0036] Fig.16 Schematic diagram of a conductive ring spring according to an embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 10 main body; 11 first part; 12 second part; 13 cover plate; 14 terminal slot; 15 buckle; 16 first limiting part; 20 terminal housing; 21 accommodating cavity; 211 assembly hole; 212 positioning ring; 213 fixing slot; 22 second limiting part; 30 terminal; 31 inner shell; 311 through hole; 312 first slot; 313 second slot; 314 limiting protrusion; 315 positioning boss; 32 rotating spring; 321 first connecting ring; 322 second connecting ring; 323 spring piece; 40 fixing piece; 50 anti-loosening spring; 51 bending limiting part; 60 conductive ring spring; 70 anti-tentacle protection cap; 71 center hole. DETAILED DESCRIPTION

[0039] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. It is possible for a person skilled in the art to fully understand the present invention without the description of these details. In order to avoid confusing the essence of the present invention, known methods, processes, flows, components and circuits are not described in detail.

[0040] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0041] Unless the context clearly requires otherwise, words such as "include", "comprising" and the like in this application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning of "including but not limited to".

[0042] In the description of the embodiments of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0043] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] When an element or layer is referred to as being "on", "engaged to", "connected to" or "coupled to" another element or layer, it may be directly on, directly engaged to, connected to or coupled to another element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as being "directly" "on", "directly engaged to", "directly connected to" or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner. As used herein, the term "and / or" includes any or all combinations of one or more associated listed items.

[0045] For ease of explanation, spatially relative terms such as "inside", "outside", "below", "below", "lower", "above", "upper", etc. are used herein to describe the relationship of one element or feature illustrated in the figures to another element or feature. It will be understood that spatially relative terms may be intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figure is turned over, the elements described as being "below" or "below" other elements or features will then be positioned as being "above" the other elements or features. Thus, the example term "below" can include both the orientations of above and below. The device may be oriented in other ways, and the spatially relative descriptors used herein should be interpreted accordingly.

[0046] Electric vehicles are vehicles that use an onboard power source as a power source, use motors to drive the wheels, and comply with various requirements of road traffic and safety regulations. With the gradual improvement of global environmental awareness, the popularity of electric vehicles is also gradually increasing. However, since electric vehicles need to be charged to replenish energy, how to charge electric vehicles is currently an important issue and a major problem that hinders the popularization of electric vehicles.

[0047] Existing charging sockets are very inconvenient to replace. If you want to replace a damaged charging socket, you need to remove the entire cable, cut off the damaged charging socket, and replace the entire charging socket. During the repair, we also found that the terminals of the charging socket are easily worn, while other parts are intact. When repairing and replacing, other effective parts of the socket have to be discarded, causing huge waste. As a result, the maintainability of the charging socket is very poor, the maintenance efficiency is low, and the maintenance cost of the charging socket is greatly increased.

[0048] It should be understood that in this embodiment, the charging socket can be provided on the electric vehicle and electrically connected to the battery of the electric vehicle, and the battery of the electric vehicle is charged by the electrical connection between the charging socket and the charger. In other optional implementations, the charging socket can also be provided on the charging pile.

[0049] Figure 1 FIG. 4 is an exploded view of a vehicle charging socket according to an embodiment of the present invention. Figure 2 FIG. 1 is a schematic diagram of a vehicle charging socket according to an embodiment of the present invention. Figure 1 and Figure 2 As shown, the vehicle charging socket includes: a main body 10 , a terminal housing 20 , a terminal 30 , a fixing member 40 and an anti-loosening spring 50 .

[0050] Figure 3 2 is a schematic diagram of a main body of a vehicle charging socket according to an embodiment of the present invention. Figure 4 1 is a schematic structural diagram of a first portion of a main body of a vehicle charging socket according to an embodiment of the present invention. Figure 5FIG. 2 is a schematic structural diagram of the second part of the main body of the vehicle charging socket according to an embodiment of the present invention. Figure 1-5 As shown, the main body 10 is composed of a first part 11, a second part 12 and a cover plate 13. The first part 11 and the second part 12 can be detachably connected by a buckle 15, as shown in FIG. Figure 4 and Figure 5 As shown. The main body 10 is designed to be a structure in which the first part 11 and the second part 12 are detachably connected, which can facilitate the installation of the main body 10. At the same time, when only the first part 11 or the second part 12 is damaged, the damaged part can be replaced accordingly to reduce the maintenance cost. When not charging, the cover plate 13 covers the terminal to play a role in waterproofing and dustproofing, and can protect the terminal. In this embodiment, the cover plate 13 is hinged to the main body 10. In other optional implementations, the cover plate 13 can also be separated from the main body 10.

[0051] The main body 10 includes a plurality of terminal slots 14, which can be used to fix different types of terminals. In this embodiment, the terminals include a DC positive terminal and a DC negative terminal, which are located in two larger terminal slots 14 in the middle. After the plurality of terminals are electrically connected to the terminals on the charger, a charging circuit is formed to charge the battery of the electric vehicle.

[0052] like Figure 6-8 and Figure 13-14 As shown, the terminal housing 20 is detachably assembled in the main body 10, and the terminal housing 20 includes a receiving cavity 21, and a connecting hole 211 is provided at the bottom of the receiving cavity 21. In this embodiment, the connecting hole 211 is a screw hole with an internal thread, and the fixing member 40 is a screw, and the fixing member 40 is detachably screwed to the connecting hole 211; furthermore, in this embodiment, the terminal housing 20 cooperates with two larger terminal slots 14 in the main body 10 and is fixed in the terminal slots 14. The outer periphery of the terminal housing 20 is provided with a first limiting portion 16 protruding outward, and the inner wall of the terminal slot 14 is provided with a second limiting portion 22 protruding inward. The outer diameter of the first limiting portion 16 is larger than the inner diameter of the second limiting portion 22, and the first limiting portion 16 and the second limiting portion 22 cooperate to limit the relative position of the terminal housing 20 and the terminal slot 14. The bottom of the terminal housing 20 is electrically connected to the battery of the electric vehicle.

[0053] The terminal 30 is partially disposed in the accommodating cavity 21, including a bottom having a through hole 311, and the through hole 311 is disposed correspondingly to the assembly hole 211. In this embodiment, the two terminals 30 are respectively a DC positive terminal and a DC negative terminal. In other optional implementations, the terminals may also be of other types.

[0054] The fixing member 40 passes through the through hole 311 and cooperates with the assembly hole 211 to make the terminal 30 and the main body 10 detachably connected.

[0055] In this embodiment, the terminal 30 and the terminal housing 20 are detachably connected by providing a through hole 311 at the bottom of the terminal 30, and then the fixing member 40 cooperates with the assembly hole 211 in the terminal housing 20. When the terminal 30 is damaged, the terminal 30 can be replaced by removing the fixing member 40, so that the terminal 30 is easy to replace, which can reduce the maintenance cost and the maintenance time.

[0056] The terminal 30 includes an inner shell 31 and a rotating spring 32. The inner shell 31 includes a cylindrical side wall, and a limiting protrusion 314 is provided at a predetermined position on the outer periphery of the inner shell 31 side wall. The limiting protrusion 314 is annular, and the lower end surface of the limiting protrusion 314 cooperates with the upper end surface of the terminal housing 20, such as Figure 8 , Fig.13 and Fig.14 As shown, the portion of the inner shell 31 below the limiting protrusion 314 is placed in the terminal housing 20 .

[0057] A first slot 312 is provided in the side wall of the inner shell 31. In the present embodiment, a first slot 312 is provided at the bottom of the inner wall of the inner shell 31. An anti-loosening spring 50 is provided in the terminal 30 and is located on one side of the fixing member 40, and the anti-loosening spring 50 is used to limit the fixing member 40. Specifically, the anti-loosening spring 50 is interference fit with the first slot 312. Specifically, the anti-loosening spring 50 is S-shaped, and is specifically formed by bending a spring steel wire. The first slot 312 is an annular groove, and the axial dimension of the groove is substantially equal to or slightly larger than the diameter of the spring steel wire. The diameter of the groove is substantially equal to or slightly smaller than the size of the anti-loosening spring 50. In other words, the distance between the two vertices of the S-shaped spring is substantially greater than the inner diameter of the inner shell 31 and substantially equal to or slightly larger than the diameter of the groove. The S-shaped spring can be placed in the first slot 312 only after a certain deformation. After the anti-loosening spring 50 is placed in the first slot 312, it returns to its initial state and is snapped into the first slot 312, so that the anti-loosening spring 50 will not fall off from the first slot 312. The S-shaped anti-loosening spring 50 has the advantages of small size and easy installation.

[0058] Both ends of the anti-loosening spring 50 are placed in the first clamping groove 312, and the middle part of the anti-loosening spring 50 has a bending limit portion 51. The bending limit portion 51 is an S-shaped middle part, and the bending limit portion 51 corresponds to one side of the fixing member 40, and the bending limit portion 51 presses against the fixing member 40. The anti-loosening spring 50 applies axial pressure to the fixing member 40, thereby increasing the pressure between the thread of the fixing member 40 and the thread of the assembly hole 211, thereby increasing the friction force of the fixing member 40 during the horizontal rotation process, thereby preventing the fixing member 40 from loosening.

[0059] like Figure 8 and Fig. 9 As shown, in an optional implementation, the position of the first slot 312 is higher than the upper surface of the fixed fixing member 40. In other words, the bending limit portion 51 is a region where the middle of the anti-loosening spring 50 is recessed downward, and the middle of the upper surface of the anti-loosening spring 50 and the fixing member 40 abut against each other.

[0060] like Fig.10 As shown, in another optional implementation, the position of the first slot 312 is lower than the upper surface of the fixed fixing member 40. In other words, the middle part of the anti-loosening spring 50 bulges upward, and the bending limit portion 51 is the area where the middle part of the anti-loosening spring 50 bulges upward, and the outer periphery of the upper surface of the anti-loosening spring 50 and the fixing member 40 abut against each other.

[0061] like Fig.11 As shown, the bending limit portion 51 corresponds to one side of the fixing member 40 and is spaced apart from the fixing member 40. Fig. 9 and Fig.10 Compared with the implementation shown in the figure, the anti-loosening spring 50 of the present application is basically in the horizontal direction, without protrusions upward or depressions downward, and has a relatively simple shape. When the fixing member 40 moves upward in the axial direction and exceeds the spacing between the bending limit portion 51 and the fixing member 40, the anti-loosening spring 50 and the fixing member 40 abut against each other, preventing the fixing member 40 from moving upward in the axial direction too far and disengaging from the assembly hole.

[0062] It should be understood that in other optional implementations, the anti-loosening spring 50 may also be in other shapes, such as a spiral shape, etc.

[0063] like Figure 13-14 As shown, the bottom of the accommodating cavity 21 has a positioning ring 212 protruding inward, and the bottom of the inner shell 31 is provided with a positioning boss 315 cooperating with the positioning ring 212 in the outward direction. In other words, the positioning ring 212 at the bottom of the accommodating cavity 21 makes the inner diameter of the bottom of the accommodating cavity 21 smaller than the inner diameter of the upper part of the accommodating cavity 21, so that the accommodating cavity 21 is a stepped hole. The bottom of the inner shell 31 has a positioning boss 315 cooperating with the positioning ring 212. Through the cooperation of the positioning ring 212 and the positioning boss 315, the inner shell 31 and the terminal housing 20 are basically coaxial. At the same time, the through hole 311 and the positioning boss 315 are coaxial, and the assembly hole 211 and the positioning ring 212 are coaxial. Through the cooperation of the positioning ring 212 and the positioning boss 315, the through hole 311 and the assembly hole 211 can also be basically coaxial, which plays a role in positioning.

[0064] like Fig.15As shown, the rotating spring 32 includes: a first connecting ring 321, a second connecting ring 322 and a spring piece 323. The two ends of the spring piece 323 are respectively fixedly connected to the first connecting ring 321 and the second connecting ring 322, the spring piece 323 is a strip with a middle part inwardly concave, the spring piece 323 has a predetermined angle with the axial direction, and a plurality of the spring pieces 323 are arranged at intervals.

[0065] The rotating spring 32 is used to electrically connect to the charger. The diameter of the male terminal of the charger is slightly larger than the diameter of the middle part of the rotating spring 32. The male terminal is inserted into the rotating spring 32, squeezing the spring 323, so that the charger and the socket are electrically connected. Since the spring 323 is arranged obliquely, the contact area between the rotating spring 32 and the male terminal can be increased, thereby improving the stability of the electrical connection between the socket and the male terminal.

[0066] A second slot 313 is provided in the side wall of the inner shell 31. The second slot 313 is located above the first slot 312, and the second slot 313 and the first slot 312 are spaced a predetermined distance apart. The rotary spring 32 is disposed in the second slot 313. The outer diameter of the first connecting ring 321 is greater than the inner diameter of the inner shell 31 and less than or equal to the inner diameter of the second slot 313, and the second connecting ring 322 has the same size as the first connecting ring 321. The axial dimension of the second slot 313 is greater than or equal to the axial dimension of the rotary spring 32.

[0067] like Figure 1 and Figure 2 As shown, the anti-tentacle protection cap 70 has a central hole 71, which is fixedly connected to the upper end of the terminal 30. The anti-tentacle protection cap 70 is made of insulating material, which can prevent the operator from releasing the conductive part and getting an electric shock. Through the cooperation between the anti-tentacle protection cap 70 and the second slot 313, a space whose axial dimension is substantially equal to the axial dimension of the rotating spring 32 is formed between the lower surface of the anti-tentacle protection cap 70 and the second slot 313, and the rotating spring 32 is fixed in the second slot 313 by the anti-tentacle protection cap 70.

[0068] like Figure 8 and Fig.16 As shown, the vehicle charging socket further includes a conductive ring spring 60. The conductive ring spring 60 is disposed between the inner shell 31 and the terminal shell 20, and is electrically connected to the inner shell 31 and the terminal shell 20 respectively.

[0069] Specifically, the conductive ring spring 60 is in a spiral ring shape.

[0070] like Fig.16 As shown, in another optional implementation, the conductive ring spring 60 is formed into a circular ring in a spiral manner. In this embodiment, the cross section of the conductive ring spring 60 is circular, and in other optional implementations, the end face of the spring can also be elliptical or square, etc.

[0071] In this embodiment, the spirally arranged conductive ring spring 60 may have multiple contact points, so that a stable electrical connection is formed between the inner shell 31 and the terminal outer shell 20 .

[0072] like Figure 8 and Fig.14 As shown, the inner peripheral wall of the accommodating cavity 21 includes an annular fixing groove 213, and the conductive ring spring 60 is arranged in the accommodating space surrounded by the fixing groove 213 and the side wall of the inner shell 31. The conductive ring spring 60 is interference fit with the accommodating space. The accommodating space and the conductive ring spring 60 are interference fit, and the conductive ring spring 60 is compressed by the side wall of the accommodating space, so that the conductive ring spring 60 exerts a certain reaction force on the side wall of the accommodating space, so that the contact between the conductive ring spring 60 and the accommodating space is more stable.

[0073] Specifically, the inner peripheral wall of the accommodating cavity 21 includes a plurality of fixing grooves 213, and the plurality of fixing grooves 213 are arranged at intervals along the axial direction. A plurality of conductive ring springs 60 are arranged at intervals on the inner peripheral wall of the accommodating cavity 21 along the axial direction of the terminal 30, and are electrically connected to the rotary spring 32. Specifically, the conductive ring spring 60 electrically connects the terminal housing 20 and the inner housing 31, and the rotary spring 32 and the inner housing 31, thereby electrically connecting the terminal housing 20 and the rotary spring 32. The terminal housing 20 is electrically connected to the charging circuit of the battery. Therefore, when the male terminal of the charger is electrically connected to the rotary spring 32, the charging circuit of the battery is electrically connected to the power supply, thereby charging the battery.

[0074] In this embodiment, a plurality of conductive ring springs 60 are arranged along the axial direction to further increase the contact points and improve the stability of the electrical connection between the inner shell 31 and the terminal shell 20 .

[0075] The embodiment of the present invention provides a charging socket for a vehicle, by setting a through hole at the bottom of the terminal, setting a combination hole at the bottom of the terminal shell, and the fixing piece passing through the through hole and being assembled and matched with the combination hole, so that the terminal and the main body can be detachably connected through the fixing piece. By using a structure with detachable terminals, the maintenance cost and maintenance time can be reduced; it should be further explained that the present invention further sets an anti-loosening spring to prevent the screw fixing piece from loosening and stabilize the combination between the terminal shell and the terminal.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A charging socket for a vehicle, characterized in that: The vehicle charging socket comprises: Subject (10); The terminal housing (20) is detachably assembled in the main body (10), and comprises a receiving cavity (21), wherein a connecting hole (211) is provided at the bottom of the receiving cavity (21); The terminal (30) is partially disposed in the accommodating cavity (21), and comprises a bottom with a through hole (311), wherein the through hole (311) and the assembly hole (211) are disposed correspondingly; A fixing member (40) passes through the through hole (311) and cooperates with the assembly hole (211) to enable the terminal (30) and the main body (10) to be detachably connected; and An anti-loosening spring (50) is arranged in the terminal (30) and is located on one side of the fixing member (40), and the anti-loosening spring (50) is used to limit the fixing member (40); The terminal (30) comprises: An inner shell (31), wherein a side wall of the inner shell (31) is provided with a first slot (312), wherein the first slot (312) is an annular groove and is lower than an upper surface of the fixing member (40); The anti-loosening spring (50) is an S-shaped structure, and the S-shaped structure comprises a bending limit portion (51) and two vertices in the extension direction, and the bending limit portion (51) is located between the two vertices; The S-shaped structure is configured to be placed in the first slot (312) by deformation, and to restore an initial state after being placed in the first slot (312), so that the anti-loosening spring (50) will not fall off from the first slot (312), and the bending limit portion (51) corresponds to the fixing member (40).

2. The vehicle charging socket according to claim 1, characterized in that: The terminal (30) comprises: An inner shell (31) comprising a cylindrical side wall; The anti-loosening spring (50) is interference-fitted with the first clamping groove (312).

3. The vehicle charging socket according to claim 1, characterized in that: The bending limiting portion (51) presses against the fixing member (40).

4. The vehicle charging socket according to claim 2, characterized in that: The bottom of the accommodating cavity (21) is provided with a positioning ring (212) protruding inwardly, and the bottom of the inner shell (31) is provided with a positioning boss (315) cooperating with the positioning ring (212) toward the outside.

5. The vehicle charging socket according to claim 2, characterized in that: A second slot (313) is provided in the side wall of the inner shell (31): The terminal (30) further comprises: The rotating spring (32) is arranged in the second clamping groove (313).

6. The vehicle charging socket according to claim 5, characterized in that: The rotating spring (32) comprises: A first connecting ring (321); A second connecting ring (322); and The spring piece (323) has two ends respectively fixedly connected to the first connecting ring (321) and the second connecting ring (322); the spring piece (323) is in the shape of a strip with a middle portion recessed inward; the spring piece (323) has a predetermined angle with the axial direction, and a plurality of the spring pieces (323) are arranged at intervals.

7. The vehicle charging socket according to claim 6, characterized in that: The inner shell (31) has a channel, and one end of the channel is provided with the second slot (313); The outer diameter of the first connecting ring (321) is larger than the inner diameter of the channel and smaller than the inner diameter of the second slot (313), while the second connecting ring (322) has the same size as the first connecting ring (321).

8. The vehicle charging socket according to claim 5, characterized in that: The vehicle charging socket further comprises: A conductive ring spring (60) is arranged between the inner shell (31) and the terminal shell (20), and is electrically connected to the inner shell (31) and the terminal shell (20) respectively.

9. The vehicle charging socket according to claim 8, characterized in that: The conductive ring spring (60) is in the shape of a spiral ring.

10. The vehicle charging socket according to claim 8, characterized in that: A plurality of conductive ring springs (60) are arranged at intervals on the inner peripheral wall of the accommodating cavity (21) along the axial direction of the terminal (30), and are electrically connected to the rotary spring (32).

11. The vehicle charging socket according to claim 9, characterized in that: The inner peripheral wall of the accommodating cavity (21) comprises an annular fixing groove (213), and the conductive ring spring (60) is arranged in an accommodating space surrounded by the fixing groove (213) and the side wall of the inner shell (31); Wherein, the conductive ring spring (60) is interference-fitted with the accommodation space.

12. The vehicle charging socket according to claim 1, characterized in that: The vehicle charging socket further comprises: The anti-tentacled protective cap (70) has a central hole (71) and is fixedly connected to the upper end of the terminal (30).

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