Direct plug-in connector

Abstract

The present invention relates to a plug-in connector, including a socket, a plug, and a locking mechanism. The plug includes a plug housing and a plug terminal in the plug housing. The plug terminal is clamped in the plug housing by a clamping structure, which includes a first clamping sleeve and a second clamping sleeve. The plug terminal is assembled in the first clamping sleeve. One end of the first clamping sleeve clamps the front end of the plug terminal. An annular assembly space is formed between the rear end outer wall of the plug terminal and the inner wall of the other end of the first clamping sleeve. A first limiting groove and a second limiting groove are provided on the first clamping sleeve along the direction in which the second clamping sleeve is inserted into the annular assembly space. A limiting block that is first clamped into the first limiting groove and then clamped into the second limiting groove is fixed on the second clamping sleeve. A locking structure that clamps the inner wall of the plug housing after the limiting block is clamped into the second limiting groove is fixed on the second clamping sleeve. The two clamping sleeves are assembled into the plug housing in two steps, that is, pre-assembled first and then locked twice, so as to improve the flexibility and convenience of assembly and ensure the accuracy and stability of assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical connectors, and in particular to a straight-plug connector. Background Art

[0002] With the utilization of new energy and the development of new energy vehicles, the electrical connectors between the electrical components in new energy vehicles need stable performance to ensure the power transmission between the electrical components. In addition, the connection stability of the electrical connectors is required to be higher when the driving conditions and road conditions of the vehicle are constantly changing. Commonly used connectors mainly include sockets, plugs, and locking mechanisms that lock the sockets and plugs after the plugs are inserted into the sockets to form an electrical connection. When in use, the plugs are inserted into the sockets, and then the two are locked by the locking mechanism. When disassembling, the locking mechanism is opened and the plugs are pulled out of the sockets. Among them, the plug includes a plug housing and terminals assembled in the plug housing. The assembly structure between the terminals and the plug housing is complicated and the terminal assembly is not secure, which affects the use of the plug. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a straight-in connector which has a stable structure and is easy to assemble.

[0004] The technical solution for implementing the present invention is as follows

[0005] A plug-in connector comprises a socket, a plug, and a locking mechanism for locking the socket and the plug after the plug is inserted into the socket to form an electrical connection. The socket comprises a socket housing with an assembly panel, a socket terminal, a first plastic plug shell, and a second plastic plug shell are arranged in the socket housing, one end of the first plastic plug shell is engaged with the socket housing to form a limit, one end of the second plastic plug shell is engaged with the other end of the first plastic plug shell to form a limit, one end of the socket terminal is in the second plastic plug shell and has a plug hole, the other end is in the first plastic plug shell and extends to the outside of the socket housing, an annular insertion cavity is formed between the inner wall of the second plastic plug shell and the outer wall of the socket terminal, the plug comprises a plug housing, a plug terminal inserted into the annular insertion cavity to form electrical conductivity with the socket terminal, and a conductive connecting column connected to the plug terminal and extending to the outside of the plug housing are arranged in the plug housing, one end of the plug terminal has a socket terminal for the socket terminal to connect The plug-in terminal is inserted into an insertion cavity, and an elastic leaf spring is arranged in the insertion cavity. The outer wall of the elastic leaf spring contacts the inner wall of the insertion cavity. After the socket terminal is installed in the insertion cavity, the outer wall of the socket terminal contacts the inner wall of the elastic leaf spring. A clamping structure for clamping the plug terminal in the plug housing is arranged in the plug housing, and the clamping structure includes a first clamping sleeve and a second clamping sleeve. The plug terminal is assembled in the first clamping sleeve, one end of the first clamping sleeve clamps the front end of the plug terminal, and an annular assembly space for the second clamping sleeve to be inserted is formed between the rear end outer wall of the plug terminal and the inner wall of the other end of the first clamping sleeve. A first limiting groove and a second limiting groove are opened on the first clamping sleeve along the direction in which the second clamping sleeve is inserted into the annular assembly space. A limiting block that is first clamped into the first limiting groove and then clamped into the second limiting groove is fixedly arranged on the second clamping sleeve. A locking structure that clamps the inner wall of the plug housing after the limiting block is clamped into the second limiting groove is also fixedly arranged on the second clamping sleeve.

[0006] The above technical solution is adopted. This structure assembles the two card sleeves into the plug housing in two steps, namely pre-assembly and then secondary locking, which improves the flexibility and convenience of assembly. At the same time, when the limit block is in the second limit groove, the locking block and the stop groove also cooperate to ensure the accuracy and stability of assembly.

[0007] Furthermore, the locking structure comprises a locking block and a stop groove, wherein the locking block is fixedly arranged on the outer wall of the second ferrule, and the stop groove is arranged on the inner wall of the plug housing.

[0008] Furthermore, the locking mechanism includes a door-shaped locking handle, the two ends of which are rotatably assembled on both sides of the plug shell, and arc-shaped locking slides are respectively arranged at both ends of the locking handle, and locking columns extending into the locking slides are respectively fixed on both sides of the socket shell, as well as a locking block that locks the middle part of the locking handle on the plug shell.

[0009] Furthermore, the elastic leaf spring is formed by bending a metal sheet into an annular body with both ends gradually narrowing toward the middle, and at least two annular contact surfaces contacting the outer wall of the socket terminal are formed on the inner wall of the middle part of the elastic leaf spring.

[0010] Furthermore, an anti-electric shock sleeve is clamped on one end of the socket terminal, and an anti-contact pin is fixedly arranged on the plug terminal and is inserted into the socket through the anti-electric shock sleeve.

[0011] Furthermore, the socket shell and the plug shell are metal shells, and a metal connecting piece is arranged in the socket shell to form an electrical connection between the socket shell and the plug shell after the plug shell is inserted into the socket shell; the inner wall of the socket shell is distributed with accommodating grooves, and each accommodating groove is equipped with a metal connecting piece, and the metal connecting piece includes a first metal sheet and a second metal sheet, one end of the first metal sheet is connected to one end of the second metal sheet, and the first metal sheet and the second metal sheet are overlapped with a gap between the two, the outer side of the first metal sheet has a claw that presses against the inner wall of the socket shell, and the other end of the second metal sheet is bent outward to form a contact piece that bulges outward to contact the plug shell, and there are teeth on the sides of the two metal sheets.

[0012] Furthermore, two or more independent socket terminals are arranged in the socket shell, and plug terminals corresponding to the number of the socket terminals and matched one by one are arranged in the plug shell; one end of the socket terminal is cylindrical and matched with the plug terminal, and the other end is sheet-shaped and is located outside the socket shell, and a baffle is provided on the first plastic plug shell to isolate the socket terminals outside the socket shell.

[0013] Furthermore, the baffle includes an isolating portion that forms a barrier between adjacent socket terminals, and an integrally formed clamping portion; hooks are provided on both sides of the clamping portion, and a hook groove is provided on the first plastic plug shell for the hooks to extend into and form a barrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure after the locking mechanism is hidden;

[0016] Figure 3 for Figure 2 A schematic diagram of the structure from a side view;

[0017] Figure 4 for Figure 3 AA section structural diagram;

[0018] Figure 5A It is a structural schematic diagram of the locking mechanism of the present invention;

[0019] Figure 5B for Figure 5A Schematic diagram from top view;

[0020] Figure 6 It is a structural schematic diagram of the locking block in the present invention;

[0021] Figure 7 for Figure 6 A schematic diagram of the structure viewed from above;

[0022] Figure 8 It is a structural schematic diagram of the socket in the present invention;

[0023] Fig. 9 It is a schematic diagram of the planar structure of the socket in the present invention;

[0024] Fig.10 It is a schematic diagram of the three-dimensional structure of the socket in the present invention;

[0025] Fig.11 It is a structural schematic diagram of the first plastic plug-in shell in the present invention;

[0026] Fig.12 for Fig.11 A rear view structural diagram of ;

[0027] Fig.13 A schematic diagram of the structure of the second plastic insert shell in the present invention;

[0028] Fig.14 for Fig.13 A rear view structural diagram of ;

[0029] Fig.15 It is a structural schematic diagram of the baffle in the present invention;

[0030] Fig.16 It is a schematic diagram of the structure of the socket housing in the present invention;

[0031] Fig.17 for Fig.16 A rear view structural diagram of ;

[0032] Fig.18 It is a schematic diagram of the three-dimensional structure of the metal connecting sheet in the present invention;

[0033] Fig.19 for Fig.18 Schematic side view of

[0034] Fig. 20 It is a schematic diagram of the structure of the waterproof rubber in the present invention;

[0035] Fig.21 It is a schematic diagram of the structure of the socket terminal in the present invention;

[0036] Fig. 22It is a schematic diagram of the structure of the plug in the present invention;

[0037] Fig.23 for Fig. 22 A cross-sectional perspective schematic diagram of

[0038] Fig.24 It is a schematic structural diagram of the plug housing of the present invention;

[0039] Fig.25 It is a structural schematic diagram of the first ferrule in the present invention;

[0040] Fig.26 It is a schematic diagram of the structure of the second ferrule in the present invention;

[0041] Fig. 27 It is a schematic diagram of the structure of the elastic leaf spring in the present invention;

[0042] Fig.28 It is a schematic diagram of the structure of the anti-touch pin in the present invention;

[0043] Fig.29 It is a schematic diagram of the plug-in waterproof rubber structure in the present invention;

[0044] Fig.30 It is a schematic diagram of the structure of the shielding sleeve in the present invention;

[0045] Fig.31 It is a structural schematic diagram of another embodiment of the present invention;

[0046] Fig.32 for Fig.31 Schematic diagram of the right view structure.

[0047] In the accompanying drawings, 1 is a socket, 2 is a plug, 3 is a locking mechanism, 4 is a locking handle, 5 is a pin, 6 is a mounting hole, 7 is a locking slide, 8 is a locking column, 9 is a locking block, 10 is an introduction notch, 11 is a card block, 12 is a lock slot, 13 is a lock hole, 14 is a locking end, 15 is a positioning pin, 16 is a positioning hole, 17 is a claw, 18 is a holding portion, 19 is a card hole, 20 is a notch, 21 is a card column, 22 is a shift hole, 23 is an assembly panel, 24 is a socket housing, 25 is a waterproof rubber, 26 is a connecting portion, 27 is a mushroom-shaped plug, 28 is a mounting hole, 29 is a socket terminal, 30 is a first plastic plug shell, 31 is a second plastic plug shell, 32 is a jack, 33 is an annular plug cavity, 34 is a socket, 35 is a step, 36 is a groove, 37 is a protrusion, 38 is a bump, 39 is a groove, 40 is a baffle, 41 is an isolation portion, 42 is a holding portion, 43 is a hook, 44 is a hook groove, 45 is a reinforcing convex rib, 46 is a plug housing, 47 is a plug terminal, 48 is a conductive connecting column, 49 is an insert cavity, 50 is an elastic leaf spring, 51 is an annular contact surface, 52 is a first ferrule, 53 is a second ferrule, 54 is an annular assembly space, 55 is a first limiting groove, 56 is a second limiting groove, 57 is a limiting block, 58 is a locking block, 59 is a stop groove, 60 is an anti-electric shock sleeve, 61 is an anti-touch pin, 62 is a convex rib, 63 is an assembly table, 64 is a stepped through hole, 65 is a metal connecting plate, 66 is a receiving groove, 67 is a first metal plate, 68 is a second metal plate, 69 is a gap, 70 is a claw, 71 is a contact plate, 72 is a tooth, 73 is a plastic frame, 74 is a buckle, 75 is rubber, 76 is a positioning boss, 77 is a positioning table, 78 is a shielding sleeve, 79 is a block, 80 is a bayonet, 81 is a protrusion, 82 is a lead housing, 83 is a sealing rubber, and 84 is a pressure-bearing part. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1As shown in FIG. 30 , a plug-in connector comprises a socket 1, a plug 2, and a locking mechanism 3 for locking the socket and the plug after the plug is inserted into the socket to form an electrical connection. The locking mechanism comprises a door-shaped locking handle 4, and pins 5 are integrally formed on both sides of the plug shell. A mounting hole 6 is provided on the locking handle. Both ends of the locking handle are inserted into the mounting holes through the pins to realize rotational assembly on both sides of the plug shell, so that the locking handle can rotate around the pins as the center, and arc-shaped locking slides 7 are respectively provided at both ends of the locking handle, and locking columns 8 extending into the locking slides are respectively fixedly provided on both sides of the socket shell, as well as a locking block 9 for locking the middle part of the locking handle to the plug shell.

[0050] The locking slide has an introduction slot 10 for the lock column to be aligned and inserted into the locking slide. The locking handle is rotated so that the introduction slot faces the lock column, and the plug is aligned with the socket and inserted, and the lock column enters the locking slide. After the plug and the socket are installed in place, the middle of the locking handle is on one side of the plug; a card block 11 is provided on the plug housing, and locking slots 12 are provided on both sides of the card block. A locking hole 13 for the locking block 9 to be inserted is provided in the middle of the locking handle. The locking block extends into the locking hole, and the end of the locking block has a locking end 14 that is respectively inserted into the locking slot 12. In this way, the locking block is inserted into the locking hole, and the locking end is stuck in the locking slot to lock the locking handle on the plug housing, ensuring the connection firmness between the plug housing and the socket housing. A positioning pin 15 is provided on the plug housing, and a positioning hole 16 for the positioning pin to be inserted is provided in the middle of the locking handle, which further ensures the locking stability between the middle of the locking handle and the plug housing to avoid shaking of the locking handle after it is in the locked state.

[0051] The lock block is an L-shaped sheet, one end of which is inserted into the lock hole, and the other end is stuck on the side of the locking handle to prevent the lock block from being fully inserted into the jack, which is inconvenient to install and disassemble; there is a claw 17 on the back of the lock block, and a clamping portion 18 on the claw, and a clamping hole 19 for the clamping portion to be inserted is provided on the bottom surface of the lock hole, and a notch 20 is formed at the front end of the lock block, and the locking end 14 is located on both sides of the notch. After the lock block is inserted into the lock hole, the notch clamps the block 11 to further improve the locking stability of the lock block on the locking handle. And clamping columns 21 are fixed on both sides of the plug housing, and shift holes 22 for the clamping columns to be inserted are provided on the inner sides of both ends of the locking handle to enhance the locking ability between the locking handle and the plug housing.

[0052] The socket includes a socket housing 24 with an assembly panel 23, and a waterproof rubber 25 is assembled on the inner side of the assembly panel 23. The waterproof rubber is arranged in a ring around the inner side of the assembly panel to form a sealed contact between the socket housing and its assembly position, thereby preventing water from entering the terminals on one side of the assembly panel and improving the waterproof ability of the socket; the waterproof rubber is provided with four connecting parts 26 and mushroom-shaped plugs 27 fixed on the connecting parts, and a mounting hole 28 connecting the two sides of the mounting panel is opened on the mounting panel, and the mushroom-shaped plug is inserted into the mounting hole on the other side of the mounting panel to assemble the waterproof rubber to the mounting panel, thereby improving the installation reliability of the waterproof rubber and preventing it from being missed and falling off.

[0053] The socket housing can be designed as a two-phase assembly space or a three-phase assembly space. A socket terminal 29, a first plastic shell 30, and a second plastic shell 31 are arranged in each assembly space. One end of the first plastic shell is snap-fitted with the socket housing to form a limit, and one end of the second plastic shell is snap-fitted with the other end of the first plastic shell to form a limit. One end of the socket terminal is in the second plastic shell and has a plug hole 32, and the other end passes through the first plastic shell and extends to the outside of the socket housing. An annular insertion cavity 33 is formed between the inner wall of the second plastic shell and the outer wall of the socket terminal; the end face of the first plastic shell has a socket 34 for inserting the socket terminal, and the end of the first plastic shell forms a step 35 to block the socket housing to form a limit. The inner wall of the other end is provided with a groove 36 for inserting the raised portion 37 of the outer wall of the second plastic shell, so that the two plastic shells are snap-fitted and assembled together. The first plastic shell has a protrusion 38 along the length of the shell, and the outer wall of the second plastic shell has a groove 39 for inserting the protrusion along the length of the shell, so as to ensure the accuracy of the insertion of the two plastic shells and avoid mutual rotation between the two. Similarly, a similar structure can be used between the first plastic shell and the socket shell to increase the stability of the assembly.

[0054] One end of the socket terminal is cylindrical and has a plug hole 32, which is matched with the plug terminal. The other end is sheet-shaped and is located outside the socket housing. A baffle 40 is provided on the first plastic plug housing to isolate the socket terminals outside the socket housing, so as to form a barrier between adjacent pins and improve safety. The baffle includes an isolation portion 41 that forms a barrier between adjacent socket terminals and an integrally formed clamping portion 42, wherein the length of the isolation portion extending out of the socket housing is greater than the length of the socket terminal extending out of the socket housing, so as to improve the isolation capability and ensure the safety between the pins.

[0055] There are hooks 43 on both sides of the clamping part, and hook grooves 44 are provided on the first plastic insert shell for the hooks to extend into and form a stop. The hooks are correspondingly inserted into the upper hook grooves of the adjacent first plastic insert shell to achieve the installation of the baffle; and reinforcing convex ribs 45 are integrally formed on both sides of the baffle, and the height of the reinforcing convex ribs gradually decreases outwards, which ensures the strength of the baffle and correspondingly reduces the space occupied by the front end of the baffle.

[0056] The plug includes a plug housing 46, in which a plug terminal 47 inserted into an annular insertion cavity and conducting with a socket terminal is arranged, and a conductive connection column 48 connected with the plug terminal and extending to the outside of the plug housing is arranged. One end of the plug terminal has an insertion cavity 49 for inserting the socket terminal, and the inner wall of the insertion cavity has an annular cavity. An elastic leaf spring 50 is arranged in the annular cavity of the insertion cavity. The outer wall of the elastic leaf spring contacts the inner wall of the insertion cavity. After the socket terminal is installed in the insertion cavity, the outer wall of the socket terminal contacts the inner wall of the elastic leaf spring. The elastic leaf spring is bent from a piece of metal sheet into an annular body with both ends gradually narrowing toward the middle. In order to ensure the contact stability between the pin and the leaf spring and the conductivity and current carrying capacity, at least two annular contact surfaces 51 in contact with the outer wall of the socket terminal are formed on the inner wall in the middle of the elastic leaf spring. In order to make the leaf spring have a strong elastic capacity, the leaf spring is bent from a piece of metal sheet into an unclosed annular shape. Of course, a closed annular structure can be adopted, which can be selected according to specific needs.

[0057] A clamping structure for clamping the plug terminal in the plug housing is arranged in the plug housing, and the clamping structure includes a first clamping sleeve 52 and a second clamping sleeve 53. The plug terminal is assembled in the first clamping sleeve, and one end of the first clamping sleeve clamps the front end of the plug terminal. An annular assembly space 54 for inserting the second clamping sleeve is formed between the outer wall of the rear end of the plug terminal and the inner wall of the other end of the first clamping sleeve. A first limiting groove 55 and a second limiting groove 56 are opened on the first clamping sleeve along the direction in which the second clamping sleeve is inserted into the annular assembly space. A limiting block 57 is fixedly arranged on the second clamping sleeve, which is first clamped into the first limiting groove and then clamped into the second limiting groove. During assembly, the plug terminal is first assembled into the first clamping sleeve, and then the first clamping sleeve is installed from one end of the plug housing, and the second clamping sleeve is inserted into the plug housing. It is installed from the other end of the plug housing, and the second ferrule is inserted into the annular assembly space. The limit block is first pushed into the first limit groove to form a pre-assembly. After confirmation, the second ferrule is pushed to continue to be inserted into the annular assembly space 54, and the limit block enters the second limit groove from the first limit groove to complete the assembly; and a locking structure is fixedly provided on the second ferrule, which clamps the inner wall of the plug housing after the limit block is inserted into the second limit groove. The locking structure includes a locking block 58 and a stop groove 59. The locking block is fixedly provided on the outer wall of the second ferrule, and the stop groove is opened on the inner wall of the plug housing, that is, when the limit block 57 is pushed into the second limit groove, the locking block extends into the stop groove to form a lock, thereby completing the work of assembling the two ferrules into the plug housing. This structure assembles the card sleeve into the plug housing in two steps, namely pre-assembly and then secondary locking, which improves the flexibility and convenience of assembly. At the same time, when the limit block is in the second limit groove, the locking block and the stop groove also cooperate to ensure the accuracy and stability of assembly.

[0058] A plastic anti-electric shock sleeve 60 is clamped on one end of the socket terminal, and an anti-contact pin 61 is fixedly provided on the plug terminal, which passes through the anti-electric shock sleeve and is inserted into the socket. When the socket and the plug are matched, the anti-contact pin passes through the anti-electric shock sleeve and is inserted into the socket 32 ​​of the socket terminal to prevent electric shock and improve safety. In the specific implementation, the outer wall of the end of the plastic anti-contact pin 61 has a convex ridge 62 protruding outward, and an assembly platform 63 is provided in the plug terminal, and a stepped through hole 64 is provided in the assembly platform. The end of the anti-contact pin is stepped, and the convex ridges are distributed on the stage. Through the setting of the convex ridges, an interference fit is formed between the end of the anti-contact pin and the stepped through hole 64, so that the anti-contact pin can be assembled to ensure that it will not fall off and has good reliability. In the specific implementation, in order to improve the reliability, the cross-section of the convex ridge is triangular.

[0059] The socket housing and the plug housing are metal housings, and a metal connecting piece 65 is arranged inside the socket housing to form an electrical connection between the socket housing and the plug housing after the plug housing is inserted into the socket housing; the socket, the plug and the metal connecting piece can be made of commonly used conductive metals, such as stainless steel, copper, etc.

[0060] The inner wall of the socket housing is provided with accommodating grooves 66, each of which is equipped with a metal connecting piece, which includes a first metal piece 67 and a second metal piece 68. One end of the first metal piece is connected to one end of the second metal piece, and the first metal piece and the second metal piece are superimposed and a gap 69 is reserved between the two. The outer side of the first metal piece has a claw 70 that presses against the inner wall of the socket housing, and the other end of the second metal piece is bent outward to form a contact piece 71 that bulges outward to contact the plug housing. There are teeth 72 on the side surfaces of the two metal pieces to increase the connection firmness between the connecting piece and the accommodating groove; in this embodiment, the first A metal sheet, a second metal sheet, a clamping claw and a contact sheet are formed by bending a metal sheet to ensure the overall performance of the metal connecting sheet; the metal connecting sheet is installed in the corresponding accommodating groove, and the clamping claw clamps the inner wall of the socket cavity to form a clamping position to prevent the metal connecting sheet from escaping from the accommodating groove; when in use, the contact sheet contacts the outer wall of the plug shell, and because the two metal sheets are superimposed and a gap is retained between them, the metal connecting sheet as a whole has a certain elasticity, so that the contact sheet can better contact the outer wall of the plug shell, and the plug and the socket are electrically connected through the metal connecting sheet, so that the connector has a shielding function to improve the working stability of the connector.

[0061] A waterproof rubber structure is arranged between the socket and the plug to form a seal between the two after being assembled in place, which includes an annular plastic frame 73, a buckle 74 is fixedly arranged on the plastic frame, and rubber 75 is fixedly arranged on the plastic frame, the rubber is wrapped on the plastic frame, and the plastic frame and the rubber form a whole; two buckles are arranged, which are respectively fixed on the inner side of the plastic frame, and the front end of the buckle is provided with a locking boss 76, and a locking table 77 cooperating with the locking boss is arranged in the plug housing to limit the buckle in the plug housing.

[0062] A sheet metal shielding sleeve 78 is clamped on the outside of the second clamping sleeve, and the outer wall of the second clamping sleeve has a conical clamping block 79. The shielding sleeve is provided with a clamping slot 80 for inserting the clamping block. After the clamping block is inserted into the clamping slot, the sheet metal shielding sleeve is clamped on the second clamping sleeve. There is a protrusion 81 that bulges outward and is bent around the shielding shell sleeve. Such a protrusion has a certain elasticity, and the protrusion touches the inner wall of the plug shell to form a shielding connection. This structure has reliable shielding connection performance and is easy to assemble.

[0063] The plug housing is clamped with a lead housing 82 and a sealing rubber 83 pressed between the lead housing and the plug housing. The inner ring of the sealing rubber 83 contacts the outer wall of the conductive connection column 48 to form a seal. The outer ring of the sealing rubber contacts the inner wall of the plug housing to form a seal. The outer end of the sealing rubber extends outward to form a pressure-receiving portion 84, which is pressed between the inner wall of the lead housing and the end face of the plug housing to ensure the sealing ability. The sealing rubber is a wavy annular rubber body.

[0064] The above combined with Figure 1 —30 describes a plug-in connector structure (two-phase plug-in connector): two independent socket terminals are arranged in the socket housing, and plug terminals corresponding to the number of socket terminals and matched one by one are arranged in the plug housing; of course, it can also be increased to a three-phase plug-in connector structure as needed, such as Fig.31 , Fig.32 It is shown that the specific structure in the three-phase connector is the same as that in the two-phase connector, with only an increase in the number of phases and a corresponding increase in size.

Claims

1. A plug-in connector, comprising a socket, a plug, and a locking mechanism for locking the socket and the plug after the plug is inserted into the socket to form an electrical connection, characterized in that: The socket comprises a socket housing with an assembly panel, wherein a socket terminal, a first plastic plug shell and a second plastic plug shell are arranged in the socket housing, one end of the first plastic plug shell is clamped with the socket housing to form a limit, one end of the second plastic plug shell is clamped with the other end of the first plastic plug shell to form a limit, one end of the socket terminal is in the second plastic plug shell and has a plug hole, and the other end passes through the first plastic plug shell and extends to the outside of the socket housing, and an annular plug cavity is formed between the inner wall of the second plastic plug shell and the outer wall of the socket terminal. The plug comprises a plug housing, in which a plug terminal is inserted into an annular insertion cavity to form electrical conduction with a socket terminal, and a conductive connection column connected to the plug terminal and extending to the outside of the plug housing is arranged. One end of the plug terminal has an insertion cavity for the socket terminal to be inserted. An elastic leaf spring is arranged in the insertion cavity. The outer wall of the elastic leaf spring contacts the inner wall of the insertion cavity. After the socket terminal is installed in the insertion cavity, the outer wall of the socket terminal contacts the inner wall of the elastic leaf spring. A clamping structure for clamping the plug terminal in the plug housing is arranged in the plug housing, the clamping structure comprises a first clamping sleeve and a second clamping sleeve, the plug terminal is assembled in the first clamping sleeve, one end of the first clamping sleeve clamps the front end of the plug terminal, and an annular assembly space for inserting the second clamping sleeve is formed between the rear end outer wall of the plug terminal and the inner wall of the other end of the first clamping sleeve, a first limiting groove and a second limiting groove are opened on the first clamping sleeve along the direction in which the second clamping sleeve is inserted into the annular assembly space, a limiting block which is first clamped into the first limiting groove and then clamped into the second limiting groove is fixedly arranged on the second clamping sleeve, and a locking structure which clamps the inner wall of the plug housing after the limiting block is clamped into the second limiting groove is also fixedly arranged on the second clamping sleeve; An anti-electric shock sleeve is clamped on one end of the socket terminal, and an anti-contact pin is fixedly arranged on the plug terminal and passes through the anti-electric shock sleeve and is inserted into the socket; The socket housing and the plug housing are metal housings, and a metal connecting piece is arranged inside the socket housing to electrically connect the socket housing and the plug housing after the plug housing is inserted into the socket housing; The inner wall of the socket shell is distributed with accommodating grooves, each of which is equipped with a metal connecting sheet, which includes a first metal sheet and a second metal sheet, one end of the first metal sheet is connected to one end of the second metal sheet, the first metal sheet and the second metal sheet are overlapped and a gap is reserved between the two, the outer side of the first metal sheet has a claw that presses against the inner wall of the socket shell, the other end of the second metal sheet is bent outward to form a contact sheet that bulges outward to contact the plug shell, and there are teeth on the side surfaces of the two metal sheets.

2. The plug-in connector according to claim 1, characterized in that: The locking structure comprises a locking block and a stop groove. The locking block is fixedly arranged on the outer wall of the second ferrule, and the stop groove is arranged on the inner wall of the plug housing.

3. The plug-in connector according to claim 1, wherein: The locking mechanism includes a door-shaped locking handle, the two ends of which are rotatably assembled on the two sides of the plug housing, and arc-shaped locking slides are respectively arranged at the two ends of the locking handle, and locking columns extending into the locking slides are respectively fixedly arranged on both sides of the socket housing, as well as a locking block that locks the middle part of the locking handle on the plug housing.

4. The plug-in connector according to claim 1, wherein: The elastic leaf spring is formed by bending a metal sheet into an annular body with both ends gradually narrowing toward the middle, and at least two annular contact surfaces contacting the outer wall of the socket terminal are formed on the inner wall of the middle part of the elastic leaf spring.

5. The plug-in connector according to any one of claims 1 to 4, characterized in that: The socket housing is provided with two or more socket terminals which are independent of each other, and the plug housing is provided with plug terminals which correspond to the number of the socket terminals and match one by one; One end of the socket terminal is cylindrical and matches with the plug terminal, and the other end is sheet-shaped and is located outside the socket housing. A baffle is provided on the first plastic plug shell to isolate the socket terminals outside the socket housing.

6. The plug-in connector according to claim 5, characterized in that: The baffle includes an isolating portion for forming a barrier between adjacent socket terminals, and an integrally formed clamping portion; The two side surfaces of the clamping part are provided with clamping hooks, and the first plastic inserting shell is provided with hook grooves for the clamping hooks to extend into and form a gear position.

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