Socket shell and socket

Abstract

The invention discloses a socket shell and a socket. The socket shell comprises a shell body and a hole wall. The hole wall continuously extends from the shell body in the axial direction of the shell body. And the hole wall surrounds along the circumferential direction of the shell body to form a mounting hole for accommodating a corresponding connecting terminal. And a drainage through hole is formed in the hole wall. According to the socket shell, the drainage through hole is formed in the hole wall, accumulated water formed in the mounting hole can be drained under the condition that water drops are brought in due to plugging of a matched connecting terminal, a drainage channel is provided through the exquisite structural design, and therefore the safety performance can be improved.

Description

[0001] This application is a divisional application of the invention patent application with application date of May 12, 2017, application number 201710334154.8, and invention name “Socket housing and socket”. Technical Field

[0002] The invention relates to a socket shell and a socket structure, in particular to a socket shell and a socket which can be used for charging an electric vehicle. Background Art

[0003] The socket is used to achieve electrical connection between the two by plugging with the matching electronic device. As more and more electric vehicles are put into operation, how to improve the safety performance of electric vehicle charging has become a factor that needs to be considered. Electric vehicles are generally charged by plugging the charging seat with an external charging gun. Due to the complexity of the application environment, electric vehicles often need to experience environmental tests such as rain, humidity, and water splashing, which often makes it easy for water to accumulate in the charging seat. When the accumulated water in the charging seat accumulates to a certain extent, it poses a hidden danger to the safety of the electric vehicle. Summary of the invention

[0004] One of the purposes of the present invention is to overcome the deficiencies in the prior art and to provide a socket housing and a socket which have a simple structure and can discharge accumulated water.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a socket housing. The socket housing comprises a shell body and a hole wall. The hole wall extends continuously from the shell body along the axial direction of the shell body; the hole wall surrounds a mounting hole along the circumference of the shell body to accommodate a corresponding connection terminal. The hole wall is provided with a drainage through hole.

[0007] Preferably, the mounting hole is arranged to extend along the axial direction of the shell body. The drainage through hole is arranged at the bottom end of the hole wall.

[0008] Preferably, the drainage through hole extends along the axial direction of the shell body, and the axial length of the drainage through hole is greater than the circumferential width.

[0009] Preferably, the drainage through hole extends continuously along the axial direction of the shell body to the free end of the hole wall.

[0010] Preferably, the shell body has a support surface, the hole wall is arranged on the support surface, and the drainage through hole is arranged to extend along the axial direction of the shell body and is spaced apart from the support surface.

[0011] Preferably, a stop wall is provided at the free end of the hole wall, and the stop wall is provided to protrude inwardly along the radial direction of the shell body to prevent the connection terminal from being separated from the mounting hole.

[0012] Preferably, the stop wall has a continuous inner circumferential surface.

[0013] Preferably, the stop wall extends along the circumference of the shell body in a closed loop shape.

[0014] Preferably, the drainage through hole extends from the hole wall to the stop wall and is L-shaped.

[0015] Preferably, the socket housing comprises a plurality of the hole walls. The housing body is provided with a retaining wall. The retaining wall is arranged to protrude along the axial direction of the housing body and extends along the circumference of the housing body to surround all the hole walls to form a retaining cavity.

[0016] Preferably, the plurality of hole walls are spaced apart from each other.

[0017] Preferably, a second drainage through hole is provided on the enclosure wall, and the second drainage through hole is communicated with the outside of the shell body.

[0018] Preferably, the mounting hole is arranged to extend in the horizontal direction. The drainage through hole is arranged at the bottom end of the hole wall in the vertical direction. The second drainage through hole is arranged at the bottom end of the enclosure wall in the vertical direction.

[0019] Preferably, the enclosure wall is provided with a retaining groove, and the retaining groove is configured to be integrally retained with the plug.

[0020] Preferably, the socket housing is an injection molded part.

[0021] Preferably, the socket housing is an integral injection-molded part.

[0022] Preferably, the socket housing is an electric vehicle charging seat housing.

[0023] The present invention further provides a socket, comprising a connecting terminal and a socket housing according to any one of the above-mentioned embodiments, wherein the connecting terminal is installed in the installation hole so as to be electrically connected to a corresponding mating terminal.

[0024] Preferably, there are one or more connecting terminals, which are used for one or more of the following electrical connections: the positive pole of the DC power supply is electrically connected to the corresponding matching terminal; the negative pole of the DC power supply is electrically connected to the corresponding matching terminal; the ground terminal is electrically connected to the corresponding matching terminal; the positive pole of the charging communication is electrically connected to the corresponding matching terminal; the negative pole of the charging communication is electrically connected to the corresponding matching terminal; the first charging connection confirmation terminal is electrically connected to the corresponding matching terminal; the second charging connection confirmation terminal is electrically connected to the corresponding matching terminal; the positive pole of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal; and the negative pole of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal.

[0025] Preferably, the connecting terminal is a female terminal, and the female terminal has a contact wall. The contact wall extends along the circumference of the shell body to form an accommodating cavity. The accommodating cavity is used to accommodate the corresponding male terminal. The contact wall has a clearance through hole and / or a clearance notch. The clearance through hole, the clearance notch and the drainage through hole are at least partially arranged opposite to each other.

[0026] Compared with the prior art, the socket housing of the present invention is provided with a drainage through hole in the hole wall, so that the accumulated water formed in the mounting hole can be discharged when the matching connection terminal (such as a female terminal) is plugged in and the water droplets are brought in. The sophisticated structural design provides a drainage channel, thereby improving the safety performance. Preferably, when the mounting hole is arranged at the bottom end in the vertical direction, the accumulated water can be automatically discharged by its own gravity, thereby improving the drainage efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional cross-sectional view of a socket housing provided by the present invention.

[0028] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of a socket housing.

[0029] Figure 3 for Figure 2 A projection diagram of the socket housing along the direction of insertion and mating with the mating terminals.

[0030] Figure 4 A three-dimensional cross-sectional view of the layout of a socket provided by the present invention.

[0031] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of an embodiment of a connecting terminal in FIG.

[0032] Figure 6 A partial three-dimensional cross-sectional view showing a mounting hole in a socket housing provided by the present invention.

[0033] Figure 7 for Figure 6 A schematic diagram of the socket housing at another viewing angle.

[0034] Figure 8 for Figure 6 A partial perspective cutaway view of a socket housing showing a plurality of mounting holes.

[0035] Fig. 9 for Figure 6 Schematic diagram of the projection of the socket housing along the installation direction of the connecting terminals.

[0036] Fig.10 A cross-sectional view of a socket provided by the present invention.

[0037] Fig.11 for Fig.10 A schematic structural diagram of an embodiment of a connecting terminal with a sealing ring.

[0038] Fig.12 for Fig.11 Schematic diagram of the structure of the connection terminals.

[0039] Fig.13 for Fig.10 A local enlarged schematic diagram of the socket at position M.

[0040] Fig.14 A schematic diagram of the three-dimensional structure of a secondary lock provided by the present invention shows the upper surface.

[0041] Fig.15 for Fig.14 A schematic diagram of the projection of the secondary lock showing the lower surface.

[0042] Fig.16 A schematic three-dimensional structural diagram of an implementation manner of a socket provided by the present invention.

[0043] Fig.17 for Fig.16 A schematic structural diagram of a socket housing is shown in FIG.

[0044] Fig.18 for Fig.16 A local enlarged schematic diagram of the socket at position M.

[0045] Fig.19 for Fig.16 The socket is provided with a projection diagram of the connection terminal along the installation direction of the connection terminal, and Fig.19 The secondary lock is shown pre-assembled on the socket housing.

[0046] Fig. 20 for Fig.19 A projection diagram of the socket, and Fig. 20 The secondary lock is shown to cooperate with the socket housing and the connecting terminal in a final locking manner.

[0047] Fig.21for Fig.19 A partial enlarged schematic diagram of the socket at N1.

[0048] Fig. 22 for Fig. 20 A partial enlarged schematic diagram of the socket at N2.

[0049] Fig.23 for Fig.19 A partial enlarged schematic diagram of the socket at N3.

[0050] Fig.24 for Fig. 20 A partial enlarged schematic diagram of the socket at N4.

[0051] Fig.25 for Fig.19 A schematic diagram of the three-dimensional structure when the socket is provided with a circuit board.

[0052] Fig.26 for Fig.25 A partial three-dimensional cross-sectional view of a socket.

[0053] Fig. 27 for Fig.25 Schematic diagram of the horizontal projection of the socket.

[0054] Fig.28 A schematic diagram of the three-dimensional structure of an electrical protection cover provided by the present invention.

[0055] Fig.29 for Fig.28 A schematic diagram of the structure of the electrical protection cover when the bottom surface is shown.

[0056] Fig.30 for Fig.28 Schematic diagram of the projection of the electrical protection cover showing the top surface.

[0057] Fig.31 for Fig.30 Bottom view of the electrical protection cover.

[0058] Fig.32 A schematic diagram of the three-dimensional structure of a socket provided by the present invention.

[0059] Fig.33 for Fig.32 Schematic diagram of the projection of the socket along the installation direction of the electrical protection cover.

[0060] Fig.34 for Fig.33 A cross-sectional view of the socket along EE.

[0061] Fig.35 for Fig.32 A schematic diagram of the three-dimensional structure of a socket provided with a connecting terminal.

[0062] Fig.36 for Fig.35 Schematic diagram of the projection of the socket along the installation direction of the electrical protection cover.

[0063] Fig.37 for Fig.36 A cross-sectional view of the socket along line FF.

[0064] Fig.38 for Fig.35 A schematic diagram of the three-dimensional structure of a socket provided with a mating housing.

[0065] Fig.39 A three-dimensional partial cross-sectional view of a sealing ring provided by the present invention.

[0066] Fig.40 for Fig.39 A three-dimensional partial cross-sectional view of the sealing ring from another perspective.

[0067] Fig.41 A schematic diagram of a reverse projection of a sealing assembly provided by the present invention from the installation direction of the connecting terminal.

[0068] Fig.42 for Fig.41 Schematic diagram of a three-dimensional exploded view of the sealing component.

[0069] Fig.43 for Fig.41 A cross-sectional view of the sealing assembly along line AA.

[0070] Fig.44 for Fig.43 A partial enlarged schematic diagram of the sealing component at M.

[0071] Fig.45 for Fig.41 A schematic diagram of the three-dimensional structure when the sealing assembly is provided with a second support member.

[0072] Fig.46 for Fig.41 A schematic diagram of the three-dimensional structure when the sealing assembly is provided with a first support member.

[0073] Fig.47 for Fig.41 A three-dimensional exploded schematic diagram of a sealing assembly when a second support member and a first support member are provided.

[0074] Fig.48 A projection schematic diagram of a socket provided by the present invention.

[0075] Fig.49 for Fig.48 A cross-sectional view of the socket along line BB.

[0076] Fig.50 for Fig.49 A local enlarged schematic diagram of the socket at position N.

[0077] Fig.51 A schematic diagram of the three-dimensional structure of a socket housing provided by the present invention.

[0078] Fig.52 for Fig.51 A partial enlarged schematic diagram of the socket housing at position M.

[0079] Fig.53 for Fig.51 A partial three-dimensional cross-sectional view of a socket housing.

[0080] Fig.54 A schematic diagram of the three-dimensional structure of a socket housing assembly provided by the present invention.

[0081] Fig.55 for Fig.54 A schematic diagram of the three-dimensional structure of the heat-conducting component is shown in the socket housing assembly.

[0082] Fig.56 A schematic diagram of the three-dimensional structure of a socket provided by the present invention.

[0083] Fig.57 for Fig.56 A partial three-dimensional cross-sectional view of a socket. DETAILED DESCRIPTION

[0084] The present invention is described in detail below in conjunction with the accompanying drawings:

[0085] See also Figures 1 to 3 , which is a socket housing 101 provided by the present invention. The socket housing 101 comprises a shell body 10 and a hole wall 20 extending continuously from the axial direction of the shell body 10. The hole wall 20 is surrounded by a mounting hole 25 along the circumference of the shell body 10. The mounting hole 25 is used to mount a corresponding connecting terminal 80. A drainage through hole 30 is provided on the hole wall 20.

[0086] The shell body 10 is used to support other mechanical structures and carry corresponding electronic components. The specific shape and structure of the shell body 10 only need to meet the corresponding supporting performance. In this embodiment, the shell body 10 is roughly plate-shaped. Specifically, the shell body 10 has a supporting surface 12. The supporting surface 12 of the shell body 10 is used to support the hole wall 20. In order to facilitate manufacturing and save space, in this embodiment, the supporting surface 12 is a plane.

[0087] Please continue reading Figure 2, the hole wall 20 is continuously extended along the axial direction of the shell body 10. The hole wall 20 is arranged on the support surface 12. In this embodiment, the outer peripheral surface of the hole wall 20 is a cylindrical surface. In order to improve the efficiency of water droplets gathering from the mounting hole 25 and being discharged from the drainage through hole 30, the inner peripheral surface 22 of the hole wall 20 is a cylindrical surface. The hole wall 20 surrounds the corresponding mounting holes 25. The specific number, distribution and size specifications of the mounting holes 25 can be satisfied as long as they can meet the requirements of installing and maintaining the required connection terminals 80. In this embodiment, nine hole walls 20, 20b, 20c, 20d, 20e, 20f, 20h, 20i, 20j enclose corresponding nine mounting holes 25, 25b, 25c, 25d, 25e, 25f, 25g, 25h, 25i, 25j, which are all arranged along the axial extension of the shell body 10, and are matched with the axially plugged mating terminals to realize the plug-in electrical connection between the mating terminals and the connecting terminals 80. At least some of the mounting holes 25, 25b, 25c, 25d, 25e, 25f, 25h, 25i, 25j have different axial extension lengths and / or radial dimensions. The inner circumference of the hole wall 20 is set as a cylindrical surface, that is, a smooth surface, so as to facilitate the accumulation of water and slide down to the drainage through hole 40.

[0088] Please continue reading Figure 3 In order to improve the holding performance of the mounting hole 25 on the corresponding connecting terminal 80, a stop wall 28 is provided at the free end 20b of the hole wall 20. The stop wall 28 is provided to protrude along the radial direction of the shell body 10. The stop wall 28 can cooperate with the axial blocking of the connecting terminal 80, thereby preventing the connecting terminal 80 from slipping out of the mounting hole 25. The specific size and structure of the stop wall 28 can be used as long as it can achieve axial blocking of the corresponding connecting terminal 80. In this embodiment, in order to fully ensure the holding performance of the stop wall 28 on the connecting terminal 80, the stop wall 28 extends along the circumference of the shell body 10 in a closed loop shape. Accordingly, the stop wall 28 is roughly in the shape of a circular ring plate. Specifically, nine stopper wall holes 28, 28b, 28c, 28d, 28e, 28f, 28g, 28h, 28i, 28j are arranged one by one on the nine hole wall mounting holes 20, 20b, 20c, 20d, 20e, 20f, 20h, 20i, 20j. The stopper walls 28, 28b have continuous inner peripheral surfaces 29, 29b. In the present embodiment, each stopper wall 28 has an inner peripheral surface 29.

[0089] The drainage through hole 40 is arranged through the hole wall 20. The drainage through hole 40 is extended along the radial direction of the shell body 10. The specific shape and size of the drainage through hole 40 can be any as long as the accumulated water in the mounting hole 25 has a channel for discharge. In this embodiment, the drainage efficiency is improved and the performance of automatic drainage of accumulated water is obtained, and the mounting hole 25 is extended in the horizontal direction. Accordingly, the drainage through hole 40 is arranged at the bottom end of the hole wall 20. That is, the drainage through hole 40 is arranged at the bottom end in the vertical direction, so that the accumulated water can automatically slide down according to its own gravity. In order to improve the drainage performance and maintain the mechanical strength of the hole wall 20, the drainage through hole 40 extends along the axial direction of the shell body 10. Accordingly, the axial dimension of the drainage through hole 40 is larger than the circumferential dimension. In order to further improve the drainage performance, facilitate manufacturing and maintain the waterproof performance of the shell body 10, the drainage through hole 40 extends from the hole wall 20 to the stop wall 28 and is roughly an L-shaped through groove to avoid extending to the shell body 10 and reducing the waterproof performance.

[0090] In order to improve the stable connection performance with the corresponding plug during charging, the shell body 10 is provided with a retaining wall 50. The retaining wall 50 is protrudingly arranged on the shell body 10. The retaining wall 50 is continuously extended from the supporting surface 12 of the shell body 10 in the axial direction. The retaining wall 50 extends along the circumference of the shell body 10 to form a retaining cavity 55 surrounding all the hole walls 20. That is, the retaining wall 50 and the shell body 10 form a barrel-shaped structure that accommodates the corresponding hole walls 20.

[0091] In order to further improve the drainage performance and obtain automatic drainage performance, a second drainage through hole 58 is provided on the enclosure wall 50. The second drainage through hole 58 is used to drain the accumulated water in the holding cavity 55. In order to prevent the accumulated water at the bottom surrounded by the holding cavity 55 and the surface of the shell body 10 from being difficult to drain, the second drainage through hole 58 is arranged to intersect or connect with the shell body 10. That is, the second drainage through hole 58 is arranged at the bottom end of the enclosure wall 50. The inner surface of the enclosure wall 50 is a cylindrical surface, so that it is convenient for the accumulated water to accumulate and slide down to the second drainage through hole 58. In this embodiment, the second drainage through hole 58 is roughly a rectangular through hole. More specifically, the second drainage through hole 58 can be a square through hole.

[0092] Please continue reading Figure 1In order to improve the stable electrical connection with the plug when receiving the charging of the plug, the enclosure wall 50 is provided with a retaining groove 59. The retaining groove 59 is used to maintain an integral body with the mechanical structure on the plug including the mating terminal. For example, the retaining groove 59 can be engaged with a buckle (not shown) on the plug. The specific setting position, structure and size of the retaining groove 59 are selected according to needs. In this embodiment, the retaining groove 59 is provided on the outer surface of the enclosure wall 50.

[0093] The shell body 10, the hole wall 20, and the enclosure wall 50 can all be independent components. In this embodiment, the socket housing 101 is an integral part. Specifically, the socket housing 101 is an injection molded part.

[0094] See also Figure 4 The present invention further provides a socket 103. The socket 103 comprises a connection terminal 80 and a socket housing 101 as described in the above embodiment. The connection terminal 80 is accommodated in the corresponding mounting hole 25.

[0095] The connection terminals 80 are used to electrically connect the battery pack of the vehicle and the matching terminals on the charging gun. The number and specifications of the connection terminals 80 are selected according to needs. Figure 4 , connecting terminals 80, 80e, 80f, 80g, and 80j are shown. Accordingly, in this embodiment, nine connecting terminals 80 of different specifications are respectively inserted into the nine mounting holes 25, 25b, 25c, 25d, 25e, 25f, 25g, 25h, 25i, and 25j. In this embodiment, the nine connecting terminals 80 are used to respectively realize the following nine electrical connections: the positive pole of the DC power supply is electrically connected to the corresponding matching terminal; the negative pole of the DC power supply is electrically connected to the corresponding matching terminal; the grounding terminal is electrically connected to the corresponding matching terminal; the positive pole of the charging communication is electrically connected to the corresponding matching terminal; the negative pole of the charging communication is electrically connected to the corresponding matching terminal; the first charging connection confirmation terminal is electrically connected to the corresponding matching terminal; the second charging connection confirmation terminal is electrically connected to the corresponding matching terminal; the positive pole of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal; and the negative pole of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal. That is, the nine connection terminals 80 can realize the electrical connection requirements of the Chinese national standard related to the DC charging interface in the connection device for electric vehicle transmission charging.

[0096] Please also read Figure 5, the connecting terminal 80c has a contact wall 82. The contact wall 82 encloses a receiving cavity 84. The receiving cavity 84 is used to accommodate the corresponding mating terminal. The contact wall 82 is used to make contact and electrically connect with the mating terminal. The contact wall 82 has a clearance through hole 86. The clearance through hole 86 is at least partially arranged opposite to the drainage through hole 40, so that the accumulated water on the receiving cavity 84 and the corresponding mating terminal can be drained. In this embodiment, in order to improve the drainage performance, a clearance notch 88 is also provided on the contact wall 82. The clearance notch 88 extends to the end of the contact wall 82. The end of the contact wall 82 is the part that first mates with the mating terminal.

[0097] In addition, unless otherwise specified, the terms "bottom", "top", "upper", "lower", "left", and "right" that appear in the contents of the socket housing 101 described in the present invention are relative concepts. Figure 3 The upper and lower directions shown are the top and bottom ends, respectively. That is, the accumulated water slides down from top to bottom and is discharged according to its own weight. In this embodiment, the axial direction is Figure 3 The direction perpendicular to the paper. The circumferential direction is Figure 3 Circumferential direction in .

[0098] Preferably, the socket housing 101 is a housing of an electric vehicle charging seat. Accordingly, the socket 103 is an electric vehicle charging seat. The plug is a charging gun that matches the electric vehicle charging seat. Accordingly, the connecting terminal 80 is a female terminal. The matching terminal is a male terminal.

[0099] Compared with the prior art, the socket housing 101 of the present invention can drain the water accumulated in the mounting hole when the mating female terminal is plugged in, such as water droplets, by providing a drainage hole 40 in the hole wall 20, and provides a drainage channel through a sophisticated structural design, thereby improving safety performance. Preferably, when the mounting hole 25 is set at the bottom end in the vertical direction, the accumulated water can be automatically discharged by its own gravity, thereby improving the drainage efficiency.

[0100] See also Figures 6 to 9 , which is a socket housing 201 provided by the present invention. The socket housing 201 includes a housing body 210, a mounting hole 225 and a stopper 230. The mounting hole 225 is axially opened on the housing body 210 to accommodate the following connection terminals 280b, 280c, 280f, 280g. The stopper 230 is arranged on the housing body 210 to block and cooperate with the connection terminals 280b, 280c, 280f, 280g, thereby preventing the connection terminals 280b, 280c, 280f, 280g from withdrawing from the mounting hole 225.

[0101] The shell body 210 is used to support other structures and electronic components such as connecting terminals 280b, 280c, 280f, 280g. The specific shape and structure of the shell body 210 are as long as they can achieve the corresponding supporting performance. The shell body 210 is roughly in the shape of a rectangular block. The shell body 210 has a front side 211 and a rear side 212 in its axial direction. That is, when the socket housing 201 and the mating terminal (not shown in the figure) are plugged in and matched along the axial direction of the shell body 210, the mating terminal is plugged in from the front side 211 of the shell body 210 to the rear side 212 of the shell body 210 in sequence.

[0102] The mounting holes 225 are provided on the shell body 210 for mounting and accommodating the corresponding connection terminals 280b, 280c, 280f, and 280g. The mounting holes 225 are provided along the axial extension of the shell body 210 so as to accommodate the corresponding connection terminals 280b, 280c, 280f, and 280g that are axially extended and installed. The specific specifications, shapes, quantities, and distributions of the mounting holes 225 are sufficient as long as they can meet the installation requirements of the corresponding connection terminals 280b, 280c, 280f, and 280g. In this embodiment, nine mounting holes 225, 225b, 225c, 225d, 225e, 225f, 225g, 225h, 225i, and 225j are distributed on the shell body 210. Figure 8 As shown, the hole walls 220b, 220c, 220g, 220f enclose nine corresponding mounting holes 225b, 225c, 225g, 225f. A small number of the mounting holes 225, 225b, 225c, 225d, 225e, 225f, 225h, 225i, 225j have different axial extension lengths and / or radial dimensions.

[0103] In order to improve the holding performance of the mounting hole 225 on the corresponding female terminal 280, the free ends of the hole walls 220c, 220f, and 220g are provided with stop walls 228c, 228f, and 228g. The stop wall 228 is arranged to protrude along the radial direction of the shell body 210. The stop wall 228 can cooperate with the female terminal 280 to block the axial direction, thereby preventing the female terminal 280 from slipping out of the mounting hole 225c, 25f, and 25g. The specific size and structure of the stop wall 228c, 228f, and 228g can be achieved as long as it can achieve axial blocking of the corresponding female terminal 280. In this embodiment, in order to fully ensure the holding performance of the stop wall 228c, 228f, and 228g on the female terminal 280, the stop wall 228c, 228f, and 228g extends along the circumference of the shell body 210 in a closed loop. Correspondingly, the stop walls 228c, 228f, 228g are roughly in the shape of circular ring plates. Specifically, the nine stop walls 228, 228b, 228c, 228d, 228e, 228f, 228g, 228h, 228i, 228j are arranged on the nine hole wall mounting holes 220, 220b, 220c, 220d, 220e, 220f, 220h, 220i, 220j in a one-to-one correspondence.

[0104] The retaining member 230 is arranged on the shell body 210, and is arranged to be able to axially block the connection terminals 280b, 280c, 280f, and 280g. The retaining member 230 extends continuously from the shell body 210 toward the rear side 212 of the shell body 210. The retaining member 230 can be any protruding structure such as a cross bar, a convex rib, etc. that can axially block the connection terminals 280b, 280c, 280f, and 280g. The retaining member 230 can also be snap-fitted with the connection terminals 280b, 280c, 280f, and 280g through a buckle. It can be seen that the structure of the stopper 230 can satisfy the requirement that when the corresponding connecting terminal 280b, 280c, 280f, 280g is installed in the mounting hole 225, it can block the connecting terminal 280b, 280c, 280f, 280g axially to prevent the connecting terminal 280b, 280c, 280f, 280g from exiting the mounting hole 225. In this embodiment, in order to facilitate disassembly and assembly and release the blocking of the connecting terminal 280b, 280c, 280f, 280g and facilitate the replacement of the connecting terminal 280b, 280c, 280f, 280g, the stopper 230 can be a boss 232. In this embodiment, the boss 232 is radially protruding and arranged on the following leg 235. In order to further facilitate disassembly and assembly, the boss 232 has a blocking surface 232b. The blocking surface 232b can contact and block the connection terminals 280b, 280c, 280f, and 280g in the axial direction to block the connection terminal 280b from withdrawing from the rear side 212 of the shell body 210. In order to improve the blocking performance, in the present embodiment, the blocking surface 232b is arranged to extend perpendicularly to the axial direction of the shell body 210. In order to facilitate disassembly and assembly, the boss 232 also has a guiding inclined surface 232a. The guiding inclined surface 232a is arranged obliquely with the blocking surface 232b, so as to facilitate guiding the connection terminals 280b, 280c, 280f, and 280g to block and cooperate with the blocking surface 232b during installation. In order to facilitate disassembly and assembly, the stop member 230 is a cantilever beam structure, which is not connected to the connecting wall 215 but is arranged at intervals from each other.

[0105] In this embodiment, in order to improve the elastic deformation performance of the boss 232, the retaining member 230 includes a leg 235. The leg 235 is used to support the boss 232. The specific structure of the leg 235 only needs to be able to support the boss 232 and avoid the boss 232 being directly set on the shell body 210 to increase the elastic performance of the boss 232 in the radial direction. In order to further enhance the elastic deformation performance of the leg 235 and facilitate manufacturing, the leg 235 is provided with a through hole 238 in the radial direction. The through hole 238 separates the support leg 35 into two pillars 235a and 235b. In this embodiment, in order to obtain balanced force retention performance, the two pillars 235a and 235b have the same size and structure.

[0106] It is understandable that the two pillars 235a and 235b can support the boss 232 at the same time. In this embodiment, in order to facilitate the manufacture and support of the boss 232, the stop member 230 further includes a support cross arm 237. The support cross arm 237 connects the two pillars 235a and 235b. The support cross arm 237 is used to support the boss 232. The support cross arm 237 is arranged to extend in the lateral or circumferential direction of the shell body 210. In this embodiment, the support cross arm 237 extends to form an arc plate.

[0107] As a variation, in order to obtain a larger elastic deformation space for the boss 232, the leg 235 may be only one. Accordingly, the boss 232 is radially and circumferentially protrudingly arranged on the leg 235. It can also be understood that removing the boss 232 Figure 6 One of the pillars 235a (or 235b) is used, and only the other pillar 235b (or 235a) is used to support the boss 232. The boss 232 can be an embodiment of a clamping portion, so that it can be clamped and matched with the connecting terminals 280b, 280c, 280f, and 280g.

[0108] In order to enhance the protection of the stopper 230 and facilitate the stable connection with other components, the socket housing 201 further includes a retaining wall 213. The retaining wall 213 is arranged on the shell body 210 along the axial direction of the shell body 210. The retaining wall 213 is extended along the circumference of the shell body 210 to form an accommodating cavity 219. The accommodating cavity 219 is used to accommodate the stopper 230.

[0109] In order to facilitate the manufacture of the stopper 230 and facilitate the disassembly of the stopper 230 and the connection terminals 280b, 280c, 280f, 280g, the socket housing 201 further includes a connecting wall 215. The connecting wall 215 is respectively connected to the enclosure wall 213 and the retaining wall 262 described below. The connecting wall 215, the enclosure wall 213 and the retaining wall 262 described below enclose a clearance groove 217.

[0110] In order to improve the protection performance of the retaining member 230, the socket housing 201 also includes a retaining wall 262. The retaining wall 262 is arranged on the shell body 210 along the axial direction of the shell body 210. The retaining wall 262 is arranged to extend along the circumferential direction of the shell body 210, and is surrounded by the retaining member 230 to form a retaining cavity 264. The retaining cavity 264 is connected to the mounting hole 225 to retain the connecting terminals 280b, 280c, 280f, and 280g. The specific structure of the retaining wall 262 and the retaining cavity 264 only needs to be able to retain the tail of the corresponding connecting terminals 280b, 280c, 280f, and 280g. In this embodiment, the retaining wall 262 is roughly a partial circumferential wall, and is surrounded by the retaining member 230 to form a roughly circular tube shape. In order to increase the elastic deformation space of the retaining member 230 and facilitate the disassembly and assembly of the retaining member 230 and the corresponding connecting terminals 280b, 280c, 280f, 280g, the retaining wall 262 is arranged with a side wall or two side walls of the retaining member 230 at intervals in the horizontal or circumferential direction. In the present embodiment, the retaining wall 262 and the two side walls of the retaining member 230 are arranged with intervals in the circumferential direction of the shell body 210. The retaining cavity 264 only needs to be able to communicate with the mounting hole 225 to accommodate and retain the corresponding connecting terminals 280b, 280c, 280f, 280g. In the present embodiment, the retaining cavity 264 and the mounting hole 225 have the same central axis.

[0111] In order to enhance the stable holding performance of the connection terminals 280b, 280c, 280f, 280g and facilitate disassembly and assembly, the inner surface of the retaining wall 262 is protrudingly provided with retaining ribs 266. A plurality of retaining ribs 266 are arranged along the circumference of the shell body 210. The retaining ribs 266 are arranged to be able to block and cooperate with the following connection terminals 280b, 280c, 280f, 280g in the transverse and / or radial direction.

[0112] The specific material of the socket housing 201 is selected according to the needs. In this embodiment, in order to facilitate electrical insulation and manufacture a stable structure, the socket housing 201 is an injection molded part. That is, the socket housing 201 is formed as an integral part by injection molding. Accordingly, the structural setting of the aforementioned stopper 230 greatly facilitates the formation of a waterproof structure and improves the sealing and waterproof performance.

[0113] See also Fig.10 The present invention provides a socket 203. The socket 203 includes the socket housing 201 and connection terminals 280b, 280c, 280f, and 280g described in the above embodiment. The connection terminals 280b, 280c, 280f, and 280g are arranged on the socket housing 201 to achieve electrical connection with the matching terminals on the charging gun.

[0114] At least part of the connecting terminals 280b, 280c, 280f, and 280g are accommodated in the mounting hole 225, and can be arranged in axial blocking cooperation with the retaining member 230, so as to be firmly maintained in the mounting hole 225. That is, part of the structure on the connecting terminals 280b, 280c, 280f, and 280g is accommodated in the mounting hole 225. The specifications, types, and quantities of the connecting terminals 280b, 280c, 280f, and 280g are selected according to needs. In the present embodiment, the connecting terminals 280b, 280c, 280f, and 280g are female terminals, so as to be plugged and electrically connected with the matching terminals on the charging gun. In the present embodiment, the nine connecting terminals 280b, 280c, 280f, and 280g are respectively installed on the socket housing 201 to meet the corresponding Chinese national standards. Fig. 9 Four connection terminals 280b, 280c, 280f, 280g are shown.

[0115] See also Fig.11 , the connecting terminal 280f has a step portion 281f. The step portion 281f is arranged to protrude in the lateral and / or radial direction of the shell body 210, and can be arranged to cooperate with the axial blocking of the retaining member 230. The step portion 281f can be a boss-shaped protrusion arranged along the radial direction of the connecting terminals 280b, 280c, 280f, and 280g. In this embodiment, in order to fully ensure that the step portion 281 can cooperate with the axial blocking of the retaining member 230 at any circumferential angle, the step portion 281f extends in a full circle along the circumference of the shell body 210.

[0116] Please continue reading Fig.11In order to improve the sealing and waterproof performance between the connection terminals 280b, 280c, 280f, 280g and the shell body 210, the connection terminals 280b, 280c, 280f, 280g are sealed and waterproof by sleeve-mounting a sealing ring 285. Specifically, the sealing ring 285 is sleeved on the connection terminals 280b, 280c, 280f, 280g and is arranged to seal the gap between the connection terminals 280b, 280c, 280f, 280g and the hole wall 220 of the mounting hole 225. That is, the sealing ring 285 is sealed and abutted against the hole wall 220 and the connection terminals 280b, 280c, 280f, 280g respectively. In this embodiment, the sealing rings 285c, 285f, 285g are arranged to be in axial contact with the second step portion 283 described below.

[0117] Please also read Fig.12 In order to prevent the connection terminals 280b, 280c, 280f, and 280g from being over-installed, the connection terminal 280f has a second step portion 283. The second step portion 283 is arranged to protrude in the lateral and / or radial direction of the shell body 210, and can be arranged to block and cooperate with the shell body 210 in the axial direction. The second step portion 283 is arranged opposite to the step portion 281, so that the connection terminals 280b, 280c, 280f, and 280g are axially restricted between the stop member 230 and the shell body 210. Specifically, the second step portion 283 of the connection terminals 280b, 280c, 280f, and 280g blocks and cooperates with the rear surface 214 on the shell body 210, so as to block and prevent the connection terminals 280b, 280c, 280f, and 280g from continuing to move forward when they are plugged in place.

[0118] Fig.13 The angle between the guide slope 232a of the stopper 230 and the plugging direction of the connection terminal 280f is an acute angle α. Through the step portion 281f and the second step portion 283f, the connection terminal 280f is limited to a height range W limited by the stop surface 232b of the stopper 230 and the rear surface 214 of the shell body 210.

[0119] Preferably, the socket housing 201 is a housing of an electric vehicle charging seat. Accordingly, the socket 203 is an electric vehicle charging seat. The plug is a charging gun that matches the electric vehicle charging seat. Accordingly, the connection terminal 280 is a female terminal. The matching terminal is a male terminal.

[0120] In order to facilitate understanding of the relative positions of the various components described in the present invention, the "upper" and "lower" that appear in the contents of the socket housing 201 and the socket 203 recorded in the present invention are relative concepts and can be Fig.10The up and down directions shown in Fig.10 The upper portion is the rear side 212 of the shell body 210. Fig.10 The lower part in the figure is the front side 211 of the shell body 210. In addition, "left" and "right", "top" and "bottom" are all relative concepts. Figure 6 The relative directions of "axial", "lateral" and "radial" are shown in the figure. It can be understood that the axial direction can be the up and down direction, or the installation direction of the connection terminals 280b, 280c, 280f, 280g. Correspondingly, "front and rear" are relative concepts, which can indicate that the mating terminals are plugged from "front" to "rear". Specifically, the front side 212 of the shell body 210 is the outer part that cooperates with the charging gun, and the rear side 212 of the shell body 210 is the inner part of the shell installed in the body of the electric vehicle.

[0121] Compared with the prior art, the socket housing 201 of the present invention can prevent the connection terminal 280b from withdrawing from the mounting hole 225j on the housing body 210 through the stopper 230, thereby ensuring that the connection terminal 280b is stably electrically connected to the mating terminal on the charging gun. The socket housing 201 has a sophisticated structure, is easy to manufacture, and is convenient for designing a structure with better waterproof performance.

[0122] See also Fig.14 and Fig.15 , which is a secondary lock 301 provided by the present invention. The secondary lock 301 comprises a lock body 310 which can be mounted on a socket housing 302 , a locking portion 330 which can be used to longitudinally block the socket housing 302 , and a terminal holding portion 350 for holding a connection terminal 303 .

[0123] The lock body 310 has a longitudinal insertion direction. That is, the lock body 310 is inserted and installed in the socket housing 302 described below in the longitudinal direction. In this embodiment, the lock body 310 extends in the longitudinal direction. The lock body 310 can move longitudinally relative to the socket housing 302, so as to realize pre-assembly on the socket housing 302 and final locking and maintaining integration with the socket housing 302 in sequence. The specific shape and structure of the lock body 310 can be any shape as long as it can support the locking portion 330 and the terminal holding portion 350. In this embodiment, in order to fully simplify the structure and utilize the installation space, the lock body 310 is roughly in the shape of a plate extending in the transverse and longitudinal directions.

[0124] The locking portion 330 is protrudingly arranged on the lock body 10 so as to be used for longitudinal blocking cooperation with the socket housing 302 and to maintain an integral body. The specific structure of the locking portion 330 only needs to achieve the corresponding axial blocking. For example, the locking portion 330 can be a boss or a buckle. The number and distribution of the locking portions 330 are selected according to needs. In this embodiment, a pair of locking portions 330 are respectively arranged on the two side walls of the lock body 310, so as to improve the stability of the assembly to the socket housing 302 and enhance the performance of lateral retention and limiting.

[0125] In order to facilitate manufacturing and provide stable support, in this embodiment, the locking portion 330 includes a support arm 331 and a lock buckle 333. The support arm 331 is arranged on the lock body 310 and is continuously extended from the longitudinal direction of the lock body 310. Further, in order to facilitate the disassembly and assembly of the locking portion 330 and the corresponding socket housing 302, the support arm 331 is spaced from part of the side wall of the lock body 310 to form a cantilever, thereby improving the elastic deformation performance. The lock buckle 333 is arranged on the support arm 331 along the lateral direction of the lock body 310 and protrudes outward. The specific structure and size of the lock buckle 333 only need to be able to cooperate with the longitudinal blocking of the socket housing 302. In this embodiment, in order to facilitate disassembly and assembly and improve the blocking performance, the lock buckle 333 includes a guide surface (not shown in the figure) and a locking surface. The guide surface is inclined and extended relative to the longitudinal installation direction of the secondary lock 301. That is, the angle between the guide surface and the longitudinal installation direction of the secondary lock 301 is an acute angle. The locking surface is perpendicular to the longitudinal installation direction of the secondary lock 301. That is, the angle between the locking surface and the longitudinal installation direction of the secondary lock 301 is a right angle. Further, the lock buckle 333 includes a front blocking surface 333a. The front blocking surface 333a can be blocked and matched with the socket housing 302, so as to keep the secondary lock 101 in the pre-locking position and prevent the secondary lock 101 from mistakenly entering the locking position from the pre-locking position. The lock buckle 333 includes a rear blocking surface 333b. The rear blocking surface 333b can be blocked and matched with the socket housing 302 in the longitudinal direction, so as to keep the secondary lock 101 in the locking position and prevent the secondary lock 101 from leaving the locking position. The front blocking surface 333a and the rear blocking surface 333b are arranged back to back. "Front and rear" are relative concepts, that is, front and back along the longitudinal installation direction of the secondary lock 101. It should be noted that the "locking position" is the "final locking position".

[0126] The terminal holding portion 350 is provided on the lock body 310 so as to be used for blocking cooperation with the connection terminal 303. The specific shape and structure of the terminal holding portion 350 only need to be able to block cooperation with the connection terminal 303 along the axial direction of the connection terminal 303 to enhance the stable holding performance of the connection terminal 303 installed on the socket housing 302. The terminal holding portion 350 is continuously extended along the longitudinal direction of the lock body 310, so as to move to overlap with the connection terminal 303 when the secondary lock 301 is longitudinally assembled to achieve axial blocking. The terminal holding portion 350 can be a flange, a boss or a cantilever extending along the transverse and / or longitudinal direction of the lock body 310.

[0127] As an embodiment, in order to further enhance the position limiting and holding performance of the secondary lock 301 and the connecting terminal 303, a receiving notch 355 is provided on the lock body 310. The receiving notch 355 is used to accommodate and hold the connecting terminal 303. Specifically, the receiving notch 355 is composed of through-hole side walls 351, 352 and a bottom end wall 353. The through-hole side walls 351, 352, the bottom end wall 353 and the terminal holding portion 350c form a through-hole. That is, the terminal holding portion 350c is a top end wall opposite to and spaced from the bottom end wall 353. The receiving notch 355 can be a rectangular through-hole with chamfers. The through-hole side walls 351, 352 can enhance the lateral position limiting and holding performance of the connecting terminal 303. The bottom end wall 353 can prevent the secondary lock 301 from being excessively installed in the longitudinal direction and keep it in a pre-assembled position with the secondary lock 301. That is, the bottom end wall 353 can prevent the secondary lock 301 from moving in the reverse direction along the longitudinal installation direction, and can only move along the longitudinal installation direction until the final lock is maintained as a whole. In this embodiment, the seven accommodating notches 355c, 355d, 355e, 355f, 355g, 355h, 355i can respectively accommodate the corresponding connecting terminals 303c, 303d, 303e, 303f, 303g, 303h, 303i, and form corresponding through holes with the corresponding seven terminal holding portions 350c, 350d, 350e, 350f, 350g, 350h, 350i. Accordingly, the terminal holding portion 350c is a plate-shaped portion extending laterally.

[0128] As another embodiment, in order to further enhance the mutual limiting and holding performance of the secondary lock 301 and the connecting terminal 303 while saving materials and facilitating disassembly and assembly, the lock body 310 is provided with accommodating notches 359 and 359b. The accommodating notch 359 is used to accommodate and hold the connecting terminal 303. Specifically, the accommodating notch 359 is surrounded by a retaining side wall 356 (or 356b), a retaining bottom wall 357 (or 357b) and the terminal retaining portion 350 (or 350b). One of the retaining side walls 356 and 356b is directly opposite to the opening, which can achieve lateral blocking of the connecting terminal 303. The retaining bottom wall 357 is used to prevent the secondary lock 301 from being excessively installed in the longitudinal direction and to keep the secondary lock 301 in the pre-assembly position. The terminal retaining portion 350 serves as a retaining top wall, which is longitudinally opposite to the retaining bottom 357 and is spaced apart. In this embodiment, a pair of receiving notches 359 , 359 b are respectively disposed on two side walls of the lock body 310 and can receive corresponding connecting terminals 303 , 303 b .

[0129] The specific material of the secondary lock 301 only needs to meet the corresponding requirements. In this embodiment, the secondary lock 301 is a plastic part. In order to facilitate manufacturing and improve stability, the secondary lock 301 is an integrated part. More specifically, the secondary lock 301 is an injection molded part.

[0130] In order to improve the stability of the secondary lock 301 on the socket housing 302 along the axial direction of the connecting terminal 303, when the secondary lock 301 and the connecting terminal 303 are axially blocked and matched (that is, the secondary lock 301 is in the final locking position), the secondary lock 301 is fixedly arranged on the socket housing 302 along the axial direction of the connecting terminal 303. The secondary lock 301 can be fastened to the socket housing 302 by fasteners. In this embodiment, the secondary lock 301 is axially maintained within a preset axial space range by the limiting of the circuit board 360 described below and the fastening of the fastener 340 described below.

[0131] In order to facilitate the movement of the secondary lock 301, a clearance through hole 312 is provided on the lock body 310. The clearance through hole 312 is used to provide a space for the socket housing 302 and the circuit board 360 to be directly fastened and connected through the fastener 340. The clearance through hole 312 is surrounded by hole side walls 316, 318, a hole front side wall 319 and a hole rear side wall 317. The hole front side wall 319 is configured to be able to cooperate with the boss 377 on the socket housing 302 described below to prevent the secondary lock 301 from falling off from the pre-locking position. The hole rear side wall 317 is configured to be able to cooperate with the boss 377 to prevent the secondary lock 101 from passing the locking position when inserted, thereby providing a barrier to keep the secondary lock 101 in the locking position when the secondary lock 101 is installed.

[0132] In order to reduce the friction that may be generated between the lock body 310 and the circuit board 360, a support flange 315 is provided on the lock body 310. The support flange 315 is provided around the clearance through hole 312. The support flange 315 is provided protrudingly along the axial direction of the clearance through hole 312. In order to reduce stress and improve the anti-vibration performance of the secondary lock 101, the secondary lock 101 is respectively matched with the charging seat housing 302 and the circuit board 360 in the axial direction of the connection terminal 303 described below, that is, the matching is not in contact with each other.

[0133] See also Fig.16 The present invention provides a socket 305. The socket 305 includes a socket housing 302 and the secondary lock 301 described in the above embodiment. The secondary lock 301 can be preassembled on the socket housing 302 and can be moved longitudinally to finally lock the connection terminal 303 on the socket housing 302.

[0134] Please also read Fig.17 and Fig.18 The socket housing 302 includes a seat body 370 and a locking mating portion 380. The shape and structure of the seat body 370 can be any shape as long as it can support the corresponding connecting terminal 303. In this embodiment, the seat body 370 is generally in the shape of a block extending axially and having a chamfered outer peripheral wall.

[0135] The locking fitting portion 380 is disposed on the seat body 370 and can be assembled integrally with the locking portion 330 of the secondary lock 301. The specific shape and structure of the locking fitting portion 380 can be locked with the locking portion 330, so that the secondary lock 301 and the socket housing 302 can be blocked longitudinally. In this embodiment, the locking fitting portion 380 is roughly the lock buckle 333 structure with the locking portion 330. In order to improve the lateral limiting performance of the secondary lock 301, a pair of locking fitting portions 380 are arranged at intervals in the lateral direction.

[0136] In order to enhance the lateral limiting and holding performance of the secondary lock 301, in this embodiment, a limiting wall 372 is protrudingly provided on the seat body 370. A pair of limiting walls 372 are arranged at intervals in the lateral direction to laterally hold the secondary lock 301. The locking matching portion 380 is arranged on the inner side wall of the limiting wall 372. A pair of limiting walls 372 are arranged to extend in the longitudinal direction of the lock body 310 to maintain the longitudinal installation direction of the secondary lock 301.

[0137] In order to facilitate the stable support of the connection terminal 303, the seat body 370 is provided with an axially extending mounting hole 375. The mounting hole 375 is used to accommodate the corresponding connection terminal 303. In this embodiment, the mounting hole 375 is a through hole. In this embodiment, the nine mounting holes 375, 375b, 375c, 375d, 375e, 375f, 375g, 375h, 375i are used to accommodate the nine connection terminals 303, 303b, 303c, 303d, 303e, 303f, 303g, 303h, 303i in a one-to-one correspondence.

[0138] In order to facilitate the axial fastening with the fastener 340, a fastening hole 378 is provided on the seat body 370. In order to further facilitate assembly, a boss 377 is provided on the seat body 370 that is axially protruding. The fastening hole 378 is provided on the boss 377. The boss 377 protrudes and extends into the clearance through hole 312 of the secondary lock 301. The peripheral wall of the boss 377 is spaced apart from the hole wall of the clearance through hole 312. The boss 377 is provided with a step surface 379. The step surface 379 can abut against the circuit board 360, thereby supporting the circuit board 360. In this embodiment, the step surface 379 is a circular step surface. The bottom end (i.e., the free end) of the boss 377 extends through the clearance through hole 312 until the step surface 379 passes through the clearance through hole 312. That is, the step surface 379 protrudes and extends relative to the secondary lock 101 to support the circuit board 360 described below. Of course, the step surface 379 can also be flush with the surface of the secondary lock 101, as long as there is space to support the circuit board 360.

[0139] In order to reduce the influence of external force on the assembly of the secondary lock 301, the outer peripheral wall 374 of the seat body 370 is arranged to protrude in the horizontal and vertical directions of the lock body 310. In addition, in this embodiment, the socket housing 302 is an injection-molded integral part.

[0140] See also Fig.19 and Fig. 20 As a variation of the sixth embodiment, a socket 306 is provided. The socket 306 further includes a connecting terminal 303. The connecting terminal 303 is disposed on the socket housing 302 and is arranged to block and cooperate with the secondary lock 301 along the axial direction of the connecting terminal 303.

[0141] The connection terminal 303 is used to electrically connect to the matching terminal on the charging gun (not shown in the figure). The number and distribution of the connection terminals 303 are selected according to needs. In this embodiment, nine connection terminals 303, 303b, 303c, 303d, 303e, 303f, 303g, 303h, and 303i are correspondingly installed on the socket housing 302 to meet the corresponding Chinese national standards.

[0142] Please also read Fig.21 and Fig. 22 The peripheral wall of the connecting terminal 303 is provided with a retaining step 390 . Fig.21 It is shown that when the secondary lock 301 is in the final locking position relative to the socket housing 302 , the retaining step 390 can axially block the terminal retaining portion 350 .

[0143] Please also read Fig.23 and Fig.24 , the secondary lock 301 moves from the pre-locking position to the final locking position. At this time, the terminal retaining portion 350i moves to at least partially overlap with the retaining step 390 of the connecting terminal 303i, thereby achieving axial blocking of the connecting terminal 303i. Accordingly, the locking portion 330 of the secondary lock 301 and the locking matching portion 380 of the socket housing 302 are longitudinally blocked and matched.

[0144] Accordingly, in the following Fig.25 In the embodiment, the connecting terminal 303 is axially protruded relative to the terminal holding portion 350, that is, the connecting terminal 303 is protruded relative to the upper surface 311 of the lock body 310. The lower surface 313 of the lock body 310 is arranged opposite to the socket housing 302. The connecting terminal 303 can be longitudinally blocked and matched with the terminal holding portion 350, thereby preventing the secondary lock 301 from being excessively installed along the installation direction. At the same time, the locking portion 330 is blocked and matched with the locking matching portion 380, preventing the terminal holding portion 350 from longitudinally retreating and disengaging from the blocking match with the holding step 390.

[0145] See also Fig.25 As a variation of the seventh embodiment, a socket 307 is provided. The socket 307 further includes a circuit board 360. The circuit board 360 is disposed on the socket housing 302 and can be electrically connected to the connection terminal 303.

[0146] Please also read Fig.26 and Fig. 27, the circuit board 360 is also called PCB (Printed Circuit Board). The circuit board 360 is used to transmit at least one of current, voltage and electrical signals. In order to enhance the stability of the axial limit of the secondary lock 301, the circuit board 360 and the socket housing 302 are configured to limit the axial position of the secondary lock 301 in the connecting terminal 303. That is, the secondary lock 301 is arranged between the circuit board 360 and the socket housing 302. More specifically, in order to make full use of the space and facilitate the corresponding electrical connection, the circuit board 360 has a welding surface 362 and a component surface 364. The welding surface 362 is arranged opposite to the upper surface of the secondary lock 360. That is, the circuit board 360 and the secondary lock 360 are surface-to-surface limit blocks.

[0147] In order to improve the installation convenience of the secondary lock 301 , the circuit board 360 is at least partially axially spaced from the secondary lock 301 . Accordingly, the circuit board 360 can be arranged in contact with the supporting flange 315 of the secondary lock 301 .

[0148] In order to further firmly maintain the circuit board 360 and the socket housing 302 as one body, the fastener 340 is used to assemble the circuit board 360 and the socket housing 302 as one body. In this embodiment, the fastener 340 is a screw. Of course, the fastener 340 can also be a stud or the like. In this embodiment, the fastener 340 passes through the circuit board 360 in sequence and is fastened to the fastening hole 378 of the socket housing 302. The fastener 340 passes through the clearance through hole 312 on the lock body 310.

[0149] Preferably, the socket housing 302 is a housing of an electric vehicle charging seat. Accordingly, the sockets 305, 306, and 307 are electric vehicle charging seats. The plug is a charging gun that matches the electric vehicle charging seat. Accordingly, the connection terminal 303 is a female terminal. The matching terminal is a male terminal.

[0150] It should be noted that, unless otherwise specified, the “horizontal” in the contents of the present invention regarding the secondary lock 301 and the sockets 305, 306, 307, etc., is Fig.15 The left and right sides of the secondary lock 301 in the vertical direction are as follows: Fig.15 The direction in which the secondary lock 301 is installed to the socket housing 302 is Fig.15 The top-down direction shown in the figure is the direction shown by arrow T1; “axial” refers to the axial direction of the connecting terminal 303 and is the installation direction of the connecting terminal 303, that is, vertical. Fig.15The direction of the midplane; "inside" and "outside" are relative concepts, which means that the direction close to the left and right sides is "inside". The above-mentioned direction definitions appearing in the present invention are all relative concepts and are only used in conjunction with the drawings to facilitate understanding of the relative positions of various components.

[0151] Compared with the prior art, the secondary lock 301 of the present invention can be preassembled on the socket housing 302, so as to be kept in one piece and convenient for transportation. When the secondary lock 301 is installed on the socket housing 302 along the preset longitudinal direction, the locking portion 330 can block and cooperate with the socket housing 302 to keep it in one piece, and the terminal holding portion 350 is kept in the blocking and holding position for the connection terminal 303, so that the terminal holding portion 350 can block and cooperate with the connection terminal 303 along the axial direction of the connection terminal 303.

[0152] See also Figure 28 to Figure 31 , which is an electrical protection cover 401 provided by the present invention. The electrical protection cover 401 is used to protect the corresponding components on the socket 409. The electrical protection cover 401 includes a cover body 410, a mounting portion 430 provided on the cover body 410 to be mounted on the housing 402, and an accommodating hole 450 opened on the cover body 410 to accommodate the connecting terminal 403.

[0153] The cover body 410 is used to cover the circuit board 460 to protect the circuit board 460 and the corresponding electronic components (not shown in the figure) arranged on the circuit board 460. The specific shape, structure and setting method of the cover body 410 can be used as long as it can achieve partial or full protection of the circuit board 460. The cover body 410 extends along the radial direction of the socket 405, so as to cover the circuit board 460 located at one axial end of the shell 402. It can also be understood that the cover body 410 extends in the transverse and longitudinal direction of the shell 402. The axial, transverse and longitudinal directions of the shell 402 are perpendicular to each other. In this embodiment, in order to fully save space, the cover body 410 is roughly plate-shaped. In order to further enhance the protection of the circuit board 460 and provide a storage space for electronic components, the cover body 410 and the upper surface 461 of the circuit board 460 are spaced apart along the direction of the electrical protection cover 401.

[0154] The mounting portion 430 is arranged on the cover body 410 to be used for mounting the electrical protection cover 401 on the housing 402 described below. The specific shape and structure of the mounting portion 430 can be used as long as the corresponding installation can be achieved. That is, the mounting portion 430 can be plugged, hinged, etc. with the housing 402. In the present embodiment, the mounting portion 430 is a buckle, which can be used to snap-fit ​​and assemble with the housing 402. Specifically, the mounting portion 430 is arranged on the support cantilever 435 described below. In the present embodiment, four mounting portions 430 are arranged to protrude outward. The number and distribution of the mounting portions 430 are selected according to application requirements. In the present embodiment, two mounting portions 430, 430d are arranged on one side wall of the cover body 410. The other two mounting portions 430b, 430c are arranged on the other side wall of the cover body 410.

[0155] In order to facilitate the disassembly and assembly of the mounting portion 430, a support cantilever 435 is provided on the cover body 410. The support cantilever 435 is continuously extended along the mounting direction of the electrical protection cover 401. The support cantilever 435 is provided on the side wall of the cover body 410. Accordingly, the four support cantilever 435, 435b, 435c, 435d are respectively used to support the corresponding mounting portions 430, 430b, 430c, 430d.

[0156] The receiving hole 450 is provided on the cover body 410 and can be used to receive the connection terminal 403. The number and distribution of the receiving holes 450 are selected as required. In this embodiment, five receiving holes 450, 450b, 450c, 450j, 450i are used to receive the corresponding connection terminals 403, 403b, 403c, 403j, 403i. In this embodiment, the through hole of the receiving hole 450 is provided along the installation direction of the electrical protection cover 401. The receiving holes 450, 450b are surrounded by corresponding hole walls 455, 455b.

[0157] In order to improve the isolation and protection performance of the receiving holes 450 and 450b on the circuit board 460 and the connecting terminals 403 and 403b, the hole walls 455 and 455b are provided with isolation walls 458 and 458b. The isolation walls 458 and 485b are protrudingly arranged along the installation direction of the electrical protection cover 401. The hole walls 455 and 455b are extended along the circumference of the connecting terminals 403 and 403b.

[0158] In order to avoid the disorderly and orderly arrangement of the wires (not shown in the figure), the cover body 410 is provided with lead through holes 442. The lead through holes 442 are arranged along the installation direction of the electrical protection cover 401. The number and distribution of the lead through holes 442 are selected according to needs, as long as it is convenient for the corresponding wires to penetrate the upper and lower sides of the cover body 410.

[0159] Furthermore, the cover body 410 is provided with a wire groove 444. The wire groove 444 is used to hold the wire. In this embodiment, the wire groove 444 is provided on the side wall of the cover body 410. Furthermore, the opening of the wire groove 44 faces the installation direction of the electrical protection cover 410.

[0160] Furthermore, a lead wire through hole 442b is provided on the cover body 410. A retaining arm 446 is provided on the cover body 410. The retaining arm 446 is provided above the lead wire through hole 442b and extends in an arch bridge shape.

[0161] Therefore, the lead wire through hole 442, the lead wire groove 444 and the retaining arm 446 disposed on the lead wire through hole 442b are respectively implementations of the wire retaining portion, which are used to constrain and guide the corresponding wire.

[0162] In order to stably hold the sealing ring 404 described below on the housing 402, a limiting arm 420 is provided on the cover body 410. The limiting arm 420 is configured to contact the sealing ring 404 on the charging seat housing 402. In this embodiment, the limiting arm 420 has a bottom plate 422. A boss 425 is provided on the bottom surface 423 of the bottom plate 422. In this embodiment, the boss 425 directly abuts against the sealing ring 404.

[0163] In order to improve the stability, the electrical protection cover 401 is an integral piece. In this embodiment, in order to facilitate manufacturing and to facilitate electrical insulation, the electrical protection cover 401 is an injection molded piece.

[0164] See also Figure 32 to Figure 34 The present invention provides a socket 405. The socket 405 includes a housing 402, a circuit board 460 and the electrical protection cover 401 as described in the above embodiment. The circuit board 460 is arranged on the housing 402. The electrical protection cover 401 is covered on the circuit board 460.

[0165] The specific shape and structure of the shell 402 only need to be able to support the corresponding circuit board 460. In the present embodiment, the shell 402 is roughly block-shaped. Furthermore, in order to support the corresponding connecting terminal 403, a corresponding mounting hole 475 is provided on the shell 402. In the present embodiment, the mounting hole 475 is a through hole that is penetrated along the installation direction of the electrical protection cover 401. The mounting hole 475 and the accommodating hole 450 only need to be able to correspond one-to-one and accommodate the corresponding connecting terminal 403, that is, the mounting hole 475 is connected to the accommodating hole 450. In the present embodiment, the mounting hole 475 and the accommodating hole 450 are axially opposite to each other. In the present embodiment, Fig.33 Five mounting holes 475, 475b, 475c, 475i, 475j are shown to accommodate the following connecting terminals 403, 403b, 403c, 403i, 403j accordingly.

[0166] In order to facilitate the realization of the snap-fitting with the electrical protection cover 401, the housing 402 is provided with a snap-fitting portion 471. The snap-fitting portion 471 can be snap-fitted with the mounting portion 430 which is a buckle. In this embodiment, the snap-fitting portion 471 is a snap-fitting hole. Of course, the snap-fitting portion 471 can also be a snap-fitting cavity.

[0167] In order to improve the sealing and waterproof performance between the housing 402 and the matching housing 407 described below, the socket 405 further includes a sealing ring 404. The sealing ring 404 is arranged on the housing 402. Specifically, the sealing ring 404 is attached to the outer peripheral wall of the bottom end of the housing 402. The sealing ring 404 can be a rubber ring. The sealing ring 404 can abut against the outer peripheral wall of the top end of the housing 202, thereby improving the sealing and waterproof performance.

[0168] See also Figure 35 to Figure 37 In order to facilitate the corresponding electrical connection, the socket 407 also includes a connection terminal 403. The connection terminal 403 is arranged on the housing 402 and can extend into the accommodating hole 450 in the opposite direction along the installation direction of the electrical protection cover 401. In this embodiment, at least part of the connection terminals 403 are arranged in the mounting hole 475. Among them, a part of the connection terminals 403 are isolated from the circuit board 460 by the isolation walls 458 and 485b, thereby improving safety performance. In this embodiment, five connection terminals 403, 403b, 403c, 403i, and 403j are respectively accommodated in the mounting holes 475, 475b, 475c, 475i, and 475j in a one-to-one correspondence.

[0169] Fig.37 The top ends of the connection terminals 403 and 403b extend into the receiving holes 450 and 450b. The isolation walls 458 and 458b extend beyond the bottom surface of the circuit board 475 and are located on both sides of the circuit board 475, thereby isolating the connection terminals 403 and 403b from the circuit board 460.

[0170] See also Fig.38, the present invention provides another socket 409. Different from the above-mentioned embodiment, the socket 409 also includes a matching shell 480. The matching shell 480 is used to provide protection and support for matching terminals (not shown in the figure). The matching shell 480 is arranged on the shell 402. The matching shell 480 has a accommodating cavity 485. The accommodating cavity 485 is used to accommodate the electrical protection cover 401. That is, the matching shell 480 is assembled into one with the shell 402 to provide protection and support for other components. The inner side wall of the matching shell 480 is in sealing contact with the sealing ring 404, so as to obtain the sealing and waterproof performance between the matching shells 480. In order to improve the performance of stable assembly, the matching shell 480 and the shell 402 are connected by snaps (not numbered in the figure) to maintain integration.

[0171] The above-mentioned structure of the sockets 405, 407, 409 is particularly suitable for charging electric vehicles, that is, it can be a socket for charging electric vehicles, so as to match with a corresponding charging gun. In particular, the isolation walls 458, 458b can isolate the connection terminals 403, 403b that conduct a large current from generating electromagnetic interference to the circuit board 460 due to the large current.

[0172] It should be noted that, unless otherwise specified, the installation direction of the electrical protection cover 401 installed on the housing 402 in the contents about the electrical protection cover 401 and the socket 405 recorded in the present invention is the axial direction of the connecting terminal 403, that is, Fig.31 The top-down direction is shown in the figure; horizontally, Fig.30 The left and right directions in the vertical direction are Fig.30 The up and down directions in the Fig.30 In addition, "upper, lower", "left, right", "top, bottom" are all relative concepts. The above direction definitions are only used in conjunction with the requirements to facilitate understanding of the relative positions of various components.

[0173] Compared with the prior art, the electrical protection cover 401 of the present invention can be conveniently and quickly installed on the housing 402 through the mounting portion 430, and the cover body 410 provides protection for the circuit board and components on the housing 402. Preferably, the electrical protection cover 401 can prevent the sealing ring 404 on the housing 402 from falling off through the limiting arm 420, which is convenient for assembly. Preferably, the electrical protection cover 401 restrains and guides the wires through wire holding portions such as through holes 442, guide grooves 444 and limiting arms 420, thereby preventing the lines from being arranged in a disorderly manner and shaking. Preferably, the hole wall of the accommodating hole of the electrical protection cover is protrudingly provided with an isolation wall 458, thereby providing electromagnetic isolation, preventing electromagnetic infection between the circuit board and the connecting terminal 403 when a large current passes through, and improving safety performance.

[0174] See also Fig.39 and Fig.40 The present invention provides a sealing ring 550. The sealing ring includes a pair of sealing side walls 551, 553 spaced apart from each other and a connecting top wall 555. Each of the sealing side walls 551, 553 includes a pair of sealing surfaces 552, 552b, 556, 556b. The pair of sealing side walls 551, 553 have the sealing surfaces 552b, 556b arranged opposite to each other. The connecting top wall 555 is arranged between the pair of sealing side walls 551, 553 and connects them into one body. The sealing ring 550 can be a one-piece piece. The sealing ring 550 can be a rubber ring. The pair of sealing side walls 551, 553 and the connecting top wall 555 form a retaining groove (559). The sealing side walls 551, 553 are respectively the first sealing side wall 551 and the second sealing side wall 553 described below. The sealing side wall 551 has a pair of sealing surfaces 552, 552b arranged back to back. The sealing side wall 553 has a pair of sealing surfaces 556 and 556b arranged back to back. The sealing surfaces 552, 552b, 556 and 556b extend in the circumferential direction and axial direction of the sealing ring 550. The sealing surfaces 552, 552b, 556 and 556b are provided with convex ribs 554, 554b, 554c, 554d, 557, 557b, 557c and 557d extending in the circumferential direction. The sealing surface 552 is provided with convex ribs 554 and 554b. The sealing surface 552b is provided with convex ribs 554c and 554d. The sealing surface 556 is provided with convex ribs 557 and 557b. The sealing surface 556b is provided with convex ribs 557c and 557d.

[0175] See also Figure 41 to Figure 44 The present invention provides a sealing assembly 501. The sealing assembly 501 includes a mounting seat 530 and a sealing ring 550. The sealing ring 550 is arranged on the mounting seat 530, and can be sealed with the mounting seat 530 and the first support member 502 described below, and can be sealed with the mounting seat 530 and the second support member 503 described below.

[0176] The mounting seat 530 is used to support electronic components. In this embodiment, the mounting seat 530 is used to support the following connection terminal 504. The mounting seat 530 has a seat body 531. The seat body 531 is used to support the connection terminal 504. In this embodiment, in order to stably support the connection terminal 504, the seat body 531 is provided with mounting holes 533. The number and arrangement of the mounting holes 533 are sufficient as long as they can hold the corresponding connection terminal 504. It can be imagined that as long as the seat body 531 and the mounting holes 533 can achieve the corresponding support, other structural forms can be used to achieve the support of the connection terminal 504.

[0177] The mounting seat 530 has an outer peripheral wall 535 and a support platform 537. The outer peripheral wall 535 may be the peripheral wall of the seat body 531. In the present embodiment, the outer peripheral wall 535 is arranged around the seat body 531. The shape and size of the outer peripheral wall 535 are selected as required. In the present embodiment, the outer peripheral wall 535 is roughly a rectangular ring with chamfers. The support platform 537 is protrudingly arranged on the outer peripheral wall 535 and extending radially along the mounting seat 530. The support platform 537 is used to directly support the sealing ring 550. The size and extended shape of the support platform 537 can be realized as long as the corresponding sealing ring 550 can be supported. In the present embodiment, in order to improve the stable support performance, the support platform 537 is radially outwardly protruding relative to the sealing ring 550. Further, the support platform 537 extends in a closed loop along the circumferential direction of the outer peripheral wall 535 of the mounting seat 530. Of course, the support platform 537 can also extend in an open loop.

[0178] In order to further improve the stable holding performance of the sealing ring 550, the mounting seat 530 further includes a retaining wall 539. The retaining wall 539 is protrudingly arranged on the support platform 537 along the axial direction of the mounting seat 530. Specifically, the retaining wall 539 is protrudingly arranged on the upper surface of the support platform 537. In this embodiment, the retaining wall 539 extends in a closed loop along the circumferential direction of the mounting seat 530. Of course, the retaining wall 539 can also be an open loop. The retaining wall 539 is radially spaced from the outer peripheral wall 535 and encloses a receiving groove 540.

[0179] In this embodiment, the receiving groove 540 is formed into a U-shaped groove by the retaining wall 539, the supporting platform 537 and the outer peripheral wall 535. The depth and width of the receiving groove 540 can be any value as long as the corresponding sealing can be achieved.

[0180] The above-mentioned components of the mounting seat 530 can be formed independently. In this embodiment, in order to facilitate manufacturing and improve stability, the mounting seat 530 is an integrated piece. Specifically, the mounting seat 530 is an injection molded part.

[0181] The sealing ring 550 is arranged on the support platform 537. The sealing ring 550 can be arranged on the support platform 537 in any manner, as long as the two sides can form a seal and waterproof with the first support member 502 and the second support member 503 respectively. For example, the sealing ring 550 is directly placed on the support platform 537, and abuts against the first support member 502 and the side wall 503 to achieve a seal and waterproof. Of course, the sealing ring 550 can also be fixed on the support platform 537 by glue. In this embodiment, in order to facilitate disassembly and assembly and obtain a stable holding performance, the sealing ring 550 has a retaining groove 559. The retaining groove 559 is mated with the retaining wall 539, so that the sealing ring 550 is maintained at a preset position relative to the mounting seat 530.

[0182] The sealing ring 550 includes a first sealing side wall 551 and a second sealing side wall 553 which are arranged opposite to each other. The first sealing side wall 551 is arranged opposite to and spaced from the outer peripheral wall 535 of the mounting seat 530. The first sealing side wall 551, the support platform 537 and the outer peripheral wall 535 surround the accommodating groove 540. The first sealing side wall 551 can be arranged in sealing contact with the first support member 502. The second sealing side wall 553 can be arranged in sealing contact with the second support member 503.

[0183] The sealing ring 550 further includes a connecting top wall 555. The connecting top wall 555 connects the first sealing side wall 551 and the second sealing side wall 553 respectively, and surrounds the retaining groove 559. In this embodiment, the retaining groove 559 extends in a closed loop shape.

[0184] The first sealing side wall 551 has a first sealing surface 552. The first sealing surface 552 can be arranged in sealing contact with the first support member 502. Further, in order to improve the sealing and waterproof performance and facilitate assembly, in this embodiment, a convex rib 554 is protrudingly arranged on the first sealing surface 552. The convex rib 554 is protrudingly arranged along the radial direction of the mounting seat 530 and can be radially abutted with the first support member 502. The side of the first sealing side wall 551 facing the retaining wall 539 is provided with convex ribs 554c and 544d. The two convex ribs 554c and 554d are arranged to abut against the retaining wall 539.

[0185] Correspondingly, the second sealing sidewall 553 has a second sealing surface 556. The second sealing surface 556 can be arranged in sealing contact with the second support member 503. Further, in order to improve the sealing and waterproof performance and facilitate assembly, in this embodiment, a second convex rib 554b is protrudingly arranged on the second sealing surface. The second convex rib 554 is protruding outwardly along the radial direction of the mounting seat 530 and can be radially abutted against the second support member 503.

[0186] In order to further improve the sealing and waterproof performance, a sealing end 558 is provided at the bottom end of the second sealing surface 556. The sealing end 558 is provided to protrude outwardly in the radial direction of the seat body 530. That is, the sealing end 558 and the second sealing side wall 553 form a step. In order to provide a stable support for the sealing end 558, the support platform 537 is provided to protrude radially relative to the sealing end 558. Of course, the support platform 537 can also be provided flush with the sealing end 536.

[0187] In order to improve the sealing and waterproof performance, the sealing ring 550 can be an elastic deformation structure. Accordingly, the first sealing side wall 551 and the second sealing side wall 553 can be arranged close to or far from each other. Specifically, the sealing ring 550 is a rubber ring. The sealing ring 550 is a sealing member and extends into a closed loop.

[0188] See also Fig.45 The present invention further provides a sealing assembly 505. Different from the above-mentioned embodiment, the sealing assembly 505 includes a second support member 503. The second support member 503 is disposed on the mounting seat 530 and is disposed in sealing cooperation with the mounting seat 530 through the sealing ring 550.

[0189] The second support member 503 is used to support corresponding components (not shown in the figure). The shape and structure of the second support member 503 only need to be able to achieve the corresponding sealing fit. The specific shape and structure of the second support member 503 only need to meet the corresponding support requirements. The second support member 503 has a matching sealing wall 572. The matching sealing wall 572 is arranged in sealing contact with the sealing ring 550. Further, the matching sealing wall 572 is arranged in sealing contact with the second sealing surface 556 of the second sealing side wall 553. In this embodiment, the matching sealing wall 572 is arranged to abut against two ribs 557, 557b in a radial direction. Furthermore, the bottom end of the matching sealing wall 572 is provided with a step 577 (see below for details). Fig.50). The step 577 abuts against the sealing end 558, thereby improving the sealing and waterproof performance. The bottom end of the matching sealing wall 572 can be abutted against the support platform 537. The second sealing side wall 553 is provided with ribs 557c and 557d on the side facing the retaining wall 539. The two ribs 557c and 557d are abutted against one side of the retaining wall 539.

[0190] See also Fig.46 The present invention provides another sealing assembly 506 . Different from the above-mentioned embodiment, the sealing assembly 506 further includes a first support member 502 . The first support member 502 is disposed on the mounting seat 530 .

[0191] The first support member 502 is used to support other components (not shown in the figure). The first support member 502 is respectively arranged in sealing contact with the mounting seat 530. In this embodiment, the first support member 502 has a mounting foot 562. The mounting foot 562 is accommodated in the accommodating groove 540, and is respectively arranged in sealing cooperation with the sealing ring 550 and the outer peripheral wall 535. The mounting foot 562 is arranged to extend along the axial direction of the seat body 530. The mounting foot 562 can be directly arranged in sealing contact with the first sealing surface 552 of the first sealing side wall 551. In this embodiment, the mounting foot 562 is arranged to abut against two ribs 554, 554b.

[0192] The first support member 502 further includes an ear plate 564. The ear plate 564 is disposed on the top of the mounting foot 562. The ear plate 564 is disposed protrudingly in the radial direction of the mounting seat 530. The ear plate 564 can support the other components. In order to improve the sealing and waterproof performance, the ear plate 564 extends outward and protrudes from the sealing ring 550. The ear plate 564 and the top of the sealing ring 550 can be axially spaced apart, thereby providing corresponding activity space.

[0193] The specific shape of the first support member 502 is selected according to the needs. In this embodiment, in order to facilitate the installation of the connection terminal 504, the first support member 502 is substantially in a closed loop shape. Accordingly, the first support member 502 is an injection molded part.

[0194] See also Fig.47 The present invention provides another sealing assembly 507. The sealing assembly 507 includes the sealing assembly 507 described in the above embodiment and a first support member 502 and a second support member 503.

[0195] Specifically, the second support member 503 further includes a second support member body 576. The second support member body 576 is used to support the matching sealing wall 572. Meanwhile, the second support member body 576 can also be used to support other components (not shown in the figure).

[0196] In order to improve the sealing and waterproof performance, the second support member 503 is assembled with the mounting seat 530. In this embodiment, the seat body 531 is provided with fastening holes 560, 560b. Specifically, the outer wall of the seat body 531 is protrudingly provided with support parts 565, 565b. The fastening holes 560, 560b are axially penetrated and arranged on the support parts 565, 565b. Correspondingly, the second support member body 574 is provided with matching fastening holes 575, 575b. The sealing assembly 507 also includes fasteners 570, 570b. The fasteners 570, 570 extend into the fastening holes 560, 560b and the matching fastening holes 575, 575b one by one, so as to fasten and assemble the mounting seat 530 and the second support member 503 into one.

[0197] See also Figures 48 to 50 The present invention further provides a socket 508. The socket 508 includes one of the sealing components 501, 505, 506, 507 described in the above-mentioned embodiments and a connecting terminal 504. In the figure, the socket 508 includes the sealing component 507 described in the above-mentioned embodiment. The connecting terminal 504 is arranged on the mounting seat 530.

[0198] The specification and quantity of the connection terminal 504 can meet the corresponding electrical connection requirements. In this embodiment, nine connection terminals 504, 504b, 504c, 504d, 504e, 504f, 504j, 504h, 504i are arranged on the mounting seat 530, specifically arranged in the mounting holes 533, 533b, 533c, 533d, 533e, 533f, 533j, 533h, 533i of the seat body 531, so as to meet the corresponding Chinese national standards. Accordingly, the socket 507 is a socket for charging electric vehicles, so that it can be connected to the charging gun for power distribution.

[0199] It should be noted that, unless otherwise clearly indicated, the terms “up, down,” “left, right,” “top, bottom,” “one side, the other side,” and “inside, outside” mentioned in the present invention regarding the sealing ring 550 , sealing assemblies 501 , 505 , 506 , 507 and socket 508 are all relative concepts. Fig.43 and Fig.44The top and bottom directions are shown. From bottom to top is the installation direction of the connection terminal 504. The first sealing surface 552 on the first sealing side wall 551 is sealed with the first support member 502; the second sealing surface 556 on the second sealing side wall 553 is sealed with the second support member 506.

[0200] Compared with the prior art, the sealing assembly 501 of the present invention can achieve sealing and waterproofing between the mounting seat 530, the first support member 502 and the second support member 503 through a sealing ring 550, and has a simple structure and convenient assembly, thereby improving performance and production efficiency. The socket 508 adopts the sealing assembly 505 to improve waterproof performance and reduce manufacturing costs.

[0201] See also Figure 51 to Figure 53 , is a socket housing 601 provided by the present invention. The socket housing 601 comprises a housing body 610 and a retaining portion 630 disposed on the housing body 610. The retaining portion 630 is used to support and retain a heat conducting member 650.

[0202] The shell body 610 can be used to support the connection terminal 603 to be measured, and other components and structures. The specific shape and structure of the shell body 610 only need to adapt to the above-mentioned supporting function. In this embodiment, the shell body 610 is roughly block-shaped. The shell body 610 has an axial direction along the installation direction of the connection terminal 603. In order to facilitate the stable maintenance of the corresponding connection terminal 603, a mounting hole 612 is provided on the shell body 610. The mounting hole 612 is used to accommodate the corresponding connection terminal 603. The size, number and distribution of the mounting holes 612 are selected as needed. Correspondingly, the mounting hole 612 is surrounded by a hole wall 613. That is, the hole wall 613 extends circumferentially to form a mounting hole 612 that can hold the corresponding connection terminal 603. In order to facilitate the corresponding electrical connection, the mounting hole 612 is a through hole arranged along the axial direction of the shell body 610. In this embodiment, the nine mounting holes 612, 612b, 612c, 612d, 612e, 612f, 612g, 612h, 612i are used to mount and hold the following nine connection terminals 603, 603b, 603c, 603d, 603e, 603f, 603g, 603h, 603i. Further, the shell body 610 has a support end surface 616. The support end surface 616 is used to support the subordinate circuit board 680. The support end surface 680 is a surface of one axial end of the shell body 610.

[0203] The specific structure of the retaining portion 630 can be used as long as it can support and retain the corresponding heat-conducting member 650, for example, it can be a buckle. In the present embodiment, in order to facilitate the support and retention of the heat-conducting member 650, the retaining portion 630 includes a first retaining portion 631 and a second retaining portion 635. The first retaining portion 631 and the second retaining portion 635 can be arranged continuously or at intervals. The first retaining portion 631 and the second retaining portion 635 are continuous, that is, the two are in contact with each other, or the two can be connected as an integral structure. In the present embodiment, the first retaining portion 631 and the second retaining portion 635 are connected to form a groove body. The first retaining portion 631 is arranged on the shell body 610 to hold the first heat-conducting portion 651 of the heat-conducting member 650. The shape and structure of the first retaining portion 631 can support and retain the corresponding first heat-conducting portion 651, so that the first heat-conducting portion 651 is arranged at a corresponding preset position. For example, the first retaining portion 631 can be a buckle, a cantilever or a through-hole wall. In this embodiment, in order to facilitate installation and heat conduction, the first retaining portion 631 is a limiting groove. The specific shape and structure of the limiting groove 631 can be limited to the first heat-conducting portion 651 of the heat-conducting member 650 at a preset position. In this embodiment, the first retaining portion 631 is a through groove surrounded by a pair of limiting walls 631a and 631b that are opposite and spaced apart. That is, one end of the limiting groove of the first retaining portion 631 extends to communicate with the corresponding mounting hole 612. The limiting groove of the first retaining portion 631 is a rectangular groove with a width equivalent to that of the first heat-conducting portion 651. More specifically, the pair of limiting walls 631a and 631b are axially protruding and arranged on the support end surface 616 of the shell body 610. That is, the retaining portion 631 is arranged on the support end surface 616.

[0204] Please continue reading Fig.52 More specifically, the first retaining portion 631 includes a pair of limiting walls 631a and 631b. The pair of limiting walls 631a and 631b are arranged opposite to each other and spaced apart. The pair of limiting walls 631a and 631b surround a limiting groove, so that the first heat conducting portion 651 can be maintained at a preset position. In this embodiment, the pair of first retaining portions 631 are arranged opposite to each other in an "eight" shape.

[0205] The second retaining portion 635 is arranged on the shell body 610. The second retaining portion 635 is used to retain the second heat conducting portion 655. The specific structure and construction of the second retaining portion 635 only need to retain the corresponding second heat conducting portion 655. The second retaining portion 635 can adopt the same structure or a different structure as the first retaining portion 631. In order to facilitate the stable heat conduction with the corresponding connecting terminal 603, the second retaining portion 635 extends into the mounting hole 612 for accommodating the connecting terminal 603. In this embodiment, the second retaining portion 635 is a guide groove. Accordingly, the second retaining portion 635 is arranged on the hole wall 613 of the mounting hole 612. Specifically, the second retaining portion 635 is a guide groove opened on the hole wall 613. That is, the second retaining portion 635 is extended along the axial direction of the shell body 610. The specific shape of the guide groove only needs to retain the corresponding second heat conducting portion 655. In this embodiment, the guide groove is a rectangular groove of the same shape as the second heat conducting portion 655.

[0206] Please continue reading Fig.52 and Fig.53 , the second retaining portion 635 includes a pair of retaining walls 635a, 635b. The pair of retaining walls 635a, 635b are arranged on the hole wall 613 and radially protrude into the mounting hole 612. The pair of retaining walls 635a, 635b are arranged to extend along the axial direction of the mounting hole 612. Further, in order to improve the supporting performance of the heat conducting member 650, the second retaining portion 635 also includes a supporting bottom wall 635c. The supporting bottom wall 635c is arranged at the bottom end of the pair of retaining walls 635a, 635b to support the bottom end 655b of the second heat conducting portion 655. In this embodiment, the supporting bottom wall 635c and the hole wall 613 are surrounded in a stepped shape.

[0207] The relative positions of the first retaining portion 631 and the second retaining portion 635 can be set as long as they can correspond to the first heat conducting portion 651 and the second heat conducting portion 655 of the heat conducting member 650 respectively. The first retaining portion 631 and the second retaining portion 635 are arranged at intervals or connected. In this embodiment, in order to facilitate assembly and save the space occupied by the heat conducting member 650, the second retaining portion 635 extends to the top of the hole wall 613 of the mounting hole 612, thereby connecting with the first retaining portion 631. That is, the first retaining portion 631 and the second retaining portion 635 extend continuously into a whole. In this embodiment, that is, the guide groove of the second retaining portion 635 is connected to the limiting groove of the first retaining portion 631.

[0208] The first retaining portion 631, the second retaining portion 635 and the shell body 610 may be independently molded parts. In this embodiment, in order to facilitate the formation of a stable structure, the socket housing 601 is an integral part. Further, in order to facilitate the acquisition of electrical insulation performance, the socket housing 601 is an injection molded part. The above-mentioned structure of the socket housing 601 is particularly suitable for the housing of an electric vehicle charging station.

[0209] See also Fig.54 The present invention further provides a socket housing assembly 605. The socket housing assembly 605 includes a heat conducting member 650 and the socket housing 601 as described in the above embodiment.

[0210] Please also read Fig.55 The specific material and structure of the heat conducting member 650 can be any material as long as they meet the corresponding heat conduction requirements. In order to improve installation convenience and improve heat conduction efficiency, the heat conducting member 650 is an elastic member, so that it can be arranged in contact with the corresponding connection terminal 603, and can be bent to meet the needs of different installation paths. In order to improve thermal conductivity and installation convenience, in this embodiment, the heat conducting member 650 is a silicone pad.

[0211] The heat conducting member 650 includes a first heat conducting portion 651 and a second heat conducting portion 655 which are connected to each other as one body. The first heat conducting portion 651 is arranged on the first holding portion 631, and can be used to conduct the heat of the connection terminal 603 to be measured to the second heat conducting portion 655. In this embodiment, the first heat conducting portion 651 is roughly rectangular flat. The second heat conducting portion 655 is also correspondingly rectangular flat. The first heat conducting portion 651 and the second heat conducting portion 655 are vertically connected to form a roughly L-shaped heat conducting member 650. The second heat conducting portion 655 is arranged on the second holding portion 635, and can conduct heat to the temperature measuring element 660. The first heat conducting portion 651 and the second heat conducting portion 655 only need to be supported by the corresponding first holding portion 631 and the second holding portion 635, and be maintained at a preset position. In this embodiment, the first heat conducting portion 651 is accommodated and restricted in the limiting groove as the first holding portion 631, and protrudes axially from the setting of the limiting groove. The second heat conducting portion 655 is accommodated and restricted in the guide groove of the second holding portion 635 and radially protrudes from the guide groove to radially abut against the connection terminal 603. The bottom end 655b of the second heat conducting portion 655 is disposed on the supporting bottom wall 635c of the second holding portion 635.

[0212] One of the innovations of the present invention is that, through the above-mentioned structural arrangement, the heat of the connection terminal 603 can be conveniently conducted away, thereby facilitating measurement. Fig.55In this embodiment, the socket housing assembly 605 further includes a temperature measuring element 660. The temperature measuring element 660 is arranged in thermally conductive contact with the second heat conducting part 655. The temperature measuring element 660 is used to measure the temperature of the connecting terminal 603 and transmit it to the circuit board 680. The specific specifications and types of the temperature measuring element 660 are selected according to needs. In this embodiment, the temperature measuring element 660 is a thermistor. More specifically, the temperature measuring element 660 is a negative temperature coefficient thermistor. Of course, the temperature measuring element 660 can also use other temperature sensors to achieve temperature measurement. The specific position of the temperature measuring element 660 is set as long as the corresponding temperature measurement can be achieved. In order to shorten the heat conduction distance and improve the corresponding temperature measurement speed, the bottom end (not shown in the figure) of the temperature measuring element 660 is set on the upper surface 651a of the first heat conducting part 651. Further, the top end 662 of the temperature measuring element 660 is arranged opposite to the lower surface of the circuit board 680 and is electrically connected. The temperature measuring element 660 is embedded in the heat conducting member 650. In this embodiment, the bottom end of the temperature measuring element 660 is abutted against the heat conducting member 650 embedded in the silicone pad.

[0213] See also Fig.56 and Fig.57 The present invention provides a first socket 608. The socket 608 comprises the socket housing assembly 605, the connecting terminal 603 and the circuit board 680 as described in the above embodiment. Preferably, the socket 608 is an electric vehicle charging seat.

[0214] The connection terminal 603 is arranged on the shell body 610. In this embodiment, at least part of the structure of the nine connection terminals 603, 603b, 603c, 603d, 603e, 603f, 603g, 603h, 603i is accommodated in the nine mounting holes 612, 612b, 612c, 612d, 612e, 612f, 612g, 612h, 612i in a one-to-one correspondence. As needed, a part of the number of connection terminals 603, 603b needs to measure the temperature. In this embodiment, two connection terminals 603, 603b conduct a large current and have a large heat generation, and need to detect the temperature.

[0215] The circuit board 680, i.e., a printed circuit board (PCB), is used to transmit corresponding electrical signals, currents, etc. In this embodiment, the circuit board 680 is electrically connected to the temperature measuring element 660 to receive corresponding temperature signals, and the temperature signals can be transmitted to other processing devices for processing. The lower surface of the circuit board 680 is arranged opposite to the upper surface of the temperature measuring element 660.

[0216] It should be noted that, unless otherwise specified, the terms "upper, lower", "left, right", "top, bottom" and the like mentioned in the contents of the socket housing 601, the socket housing assembly 605 and the socket 608 in the present invention are all relative concepts. The axial direction refers to the axial direction of the connecting terminal 603 behind the mounting hole 612, i.e., the mounting direction of the connecting terminal 603.

[0217] Compared with the prior art, the socket housing assembly 605 of the present invention supports and holds the heat-conducting member 650 by providing a holding portion 630. Furthermore, the holding portion 630 includes a first holding portion 631 and a second holding portion 635, which can respectively hold the first heat-conducting portion 651 and the second heat-conducting portion 635 of the heat-conducting member, thereby holding the heat-conducting member 650 in a preset position, which is not only convenient for discharging the heat on the connecting terminal 603, but also can achieve stable heat conduction to improve the accuracy of temperature measurement and improve the reaction speed of the temperature measuring element 660. In particular, when the connecting terminal 603 is arranged in a narrow space in the mounting hole, the heat-conducting member 650 can greatly facilitate the heat dissipation and facilitate temperature measurement.

[0218] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A socket housing (101), characterized in that: include: Shell body (10); A hole wall (20), the hole wall continuously extending from the shell body along the axial direction of the shell body; The hole wall is surrounded by a mounting hole (25) along the circumference of the shell body, and is used to accommodate a corresponding connecting terminal; The hole wall (20) is provided with a drainage through hole (40), and the drainage through hole (40) extends continuously along the axial direction of the shell body (10) to the free end of the hole wall; A stop wall (28) is provided at the free end of the hole wall (20), and the stop wall is provided to protrude radially inwardly of the shell body to prevent the connection terminal from detaching from the mounting hole. The stop wall (28) extends in a closed loop along the circumference of the shell body.

2. The socket housing according to claim 1, characterized in that: The mounting hole (25) is arranged to extend along the axial direction of the shell body; The drainage through hole (40) is arranged at the bottom end of the hole wall.

3. The socket housing according to claim 1, characterized in that: The drainage through hole (40) extends along the axial direction of the shell body (10); The axial length of the drainage through hole is greater than the circumferential width.

4. The socket housing according to claim 1, characterized in that: The shell body (10) has a supporting surface (12); The hole wall (20) is arranged on the supporting surface (12); The drainage through hole (40) is arranged to extend along the axial direction of the shell body (10) and is spaced apart from the supporting surface (12).

5. The socket housing according to claim 1, characterized in that: The stop wall (28) has a continuous inner peripheral surface (29).

6. The socket housing according to claim 1, characterized in that: The drainage through hole (40) extends from the hole wall (20) to the stop wall (28) and is L-shaped.

7. The socket housing according to claim 1, characterized in that: Comprising a plurality of the hole walls (20, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i): The shell body is provided with a retaining wall (50); The enclosure wall is arranged to protrude along the axial direction of the shell body and extends along the circumference of the shell body to surround all the hole walls (20, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) to form a retaining cavity (55).

8. The socket housing according to claim 7, characterized in that: The plurality of hole walls (20, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i) are arranged at intervals from each other.

9. The socket housing according to claim 7, characterized in that: The enclosure wall (50) is provided with a second drainage through hole (58), and the second drainage through hole (58) is communicated with the outside of the shell body (10).

10. The socket housing according to claim 9, characterized in that: The mounting hole (25) is arranged to extend in the horizontal direction; The drainage through hole (40) is arranged at the bottom end of the hole wall (20) in the vertical direction; The second drainage through hole (58) is arranged at the bottom end of the enclosure wall (50) in the vertical direction.

11. The socket housing according to claim 7, characterized in that: The enclosure wall (50) is provided with a retaining groove (59); The retaining groove is configured to be retained integrally with the plug.

12. The socket housing according to claim 1, characterized in that: The socket housing is an injection molded part.

13. The socket housing according to claim 1, characterized in that: The socket housing is an integral injection molded part.

14. The socket housing according to any one of claims 1 to 13, characterized in that: The socket housing is a housing for a charging seat of an electric vehicle.

15. A socket (103), characterized in that: include: A connecting terminal (80c) and a socket housing according to any one of claims 1 to 14; The connecting terminal is installed in the installation hole so as to be electrically connected to the corresponding mating terminal.

16. The socket according to claim 15, characterized in that: The connection terminal is one or more and is used for one or more of the following electrical connections: The positive electrode of the DC power supply is electrically connected to the corresponding matching terminal; The negative pole of the DC power supply is electrically connected to the corresponding matching terminal; The ground terminal is electrically connected to the corresponding matching terminal; The charging communication positive electrode is electrically connected to the corresponding matching terminal; The charging communication negative electrode is electrically connected to the corresponding matching terminal; The first charging connection confirmation terminal is electrically connected to the corresponding matching terminal; The second charging connection confirmation terminal is electrically connected to the corresponding matching terminal; The positive electrode of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal; The negative electrode of the low-voltage auxiliary power supply is electrically connected to the corresponding matching terminal.

17. The socket according to claim 15, characterized in that: The connecting terminal (80c) is a female terminal, and the female terminal (80c) has a contact wall (82); The contact wall extends along the circumference of the shell body (10) to form an accommodating cavity (84); The accommodating cavity (84) is used to accommodate the corresponding male terminal; The contact wall has a clearance through hole (86) and / or a clearance notch (86); The clearance through hole (86), the clearance notch (88) and the drainage through hole (40) are at least partially arranged opposite to each other.

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