A waterproof connector

Abstract

The application discloses a waterproof connector and belongs to the technical field of connectors. The waterproof connector comprises a plug, a socket, a terminal, a cover plate, a first locking sheet, a second locking sheet, a first sealing element, a second sealing element and a wire. The plug is inserted into the socket, and the terminals are arranged in the socket and the plug in pairs. The first locking sheet is in abutment with one terminal and is inserted into one end of the plug, and the second locking sheet is in abutment with the other terminal and is inserted into one end of the socket. The first sealing element is located between the plug and the socket shell, and the inner and outer surfaces of the first sealing element are tightly attached to the plug and the socket shell respectively. A pair of cover plates cover the other ends of the plug and the socket respectively, and the second sealing elements are arranged between the cover plates and the corresponding interfaces. The wires are symmetrically arranged, one end of each wire is connected to the terminal, and the other end of each wire is led out through the second sealing element and the inner hole of the cover plate. The waterproof connector solves the problem of locking function failure caused by the easy misoperation of the locking sheet, the unstable positioning of the sealing element, the insufficient contact reliability of the terminal and the poor foolproof effect in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connectors, in particular to a waterproof connector. BACKGROUND

[0002] In the fields of automobiles, industrial equipment and communication equipment, the reliability of electrical connection is of great importance. Electrical connectors, especially those with waterproof function, are key components to ensure stable signal and power transmission of wire harnesses in complex environments. Such connectors are usually composed of plugs, sockets, terminals, sealing elements and locking mechanisms. The core technical requirement is to ensure that the terminals and wires do not come out of the shell when subjected to tension and vibration; to form an effective seal at the interface of the plug and socket and the lead-out end of the wire to prevent water vapor and contaminants from entering; to have a misoperation prevention design to avoid product defects and rework caused by incorrect operations such as reverse insertion of terminals, non-just-in-time, etc. during production and assembly, and to improve production efficiency and product yield.

[0003] The conventional waterproof connectors on the market can achieve basic connection and sealing functions, but still have many shortcomings in actual application. First, the locking structure is often simple, and the locking plate may be accidentally unlocked or unable to effectively prevent the terminal from retreating when subjected to abnormal impact or vibration, resulting in quality problems such as single wire disconnection of the wire harness during turnover and use. Second, the existing sealing scheme relies mainly on a single sealing ring, and lacks independent and effective sealing structure at the terminal and wire crimping position, so the waterproof level needs to be improved. Third, many connectors lack effective secondary locking (misoperation prevention) and terminal in-place detection functions, and the terminals themselves lack reverse insertion prevention design, which makes it difficult to visually detect potential defects after assembly, often requiring additional manual inspection or final testing to find problems, resulting in high rework costs and efficiency losses, which cannot meet the stringent requirements of modern production lines for high reliability and efficiency.

[0004] Therefore, how to provide a waterproof connector to solve the defects of the existing structure is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0005] To this end, the present application provides a waterproof connector to solve the problems of secondary locking function failure, waterproof performance degradation, unreliable electrical connection and assembly errors caused by misoperation of the locking plate, unstable positioning of the sealing element, insufficient terminal contact reliability and poor foolproof effect in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The present application discloses a waterproof connector comprising:

[0008] a socket into which a plug is inserted;

[0009] terminals, arranged in pairs, respectively inserted into the socket and the plug;

[0010] a first locking piece abutting against one of the terminals, the first locking piece being inserted into the plug close to one end of the socket;

[0011] a second locking piece abutting against another of the terminals, the second locking piece being inserted into the socket close to the other end of the plug;

[0012] a first sealing member arranged in the gap between the plug and the socket, an outer surface of the first sealing member abutting against the socket, and an inner surface of the first sealing member abutting against the plug;

[0013] cover plates, arranged in pairs, one of the cover plates being inserted into the other end of the plug, and the other of the cover plates being sleeved on the other end of the socket;

[0014] second sealing members, arranged in pairs, one of the second sealing members being arranged between the cover plate and the plug, and the other of the second sealing members being arranged between the cover plate and the socket;

[0015] a plurality of wires, arranged symmetrically, one end of each of the wires being inserted into the terminal, and the other end of each of the wires being led out of the inner hole of the second sealing member and the cover plate.

[0016] In a possible implementation, the socket comprises:

[0017] a socket shell, an inner wall of the socket shell being connected with a connecting block;

[0018] a plurality of second protrusions integrally formed on an outer wall of the connecting block, an upper surface of each of the second protrusions being integrally formed with a first protruding block and a second protruding block, the first protruding block and the second protruding block being arranged on different second protrusions respectively, a lower surface of each of the second protrusions being provided with a second limiting groove, and a protruding block of the terminal being clamped in the second limiting groove;

[0019] a second elastic arm mounted on the inner wall of the socket shell and abutting against a side wall of the terminal.

[0020] In a possible implementation, the plug comprises:

[0021] a plug shell, an inner wall of the plug shell being extended with a terminal compartment, an outer wall of the terminal compartment being integrally formed with a first limiting block and a second limiting block, and the first limiting block and the second limiting block not being in the same straight line in the vertical direction;

[0022] a first elastic arm mounted on the inner wall of the plug shell and abutting against a side wall of the terminal;

[0023] A first protruding rib is mounted on the inner wall of the plug shell, the first protruding rib is arranged at a different horizontal plane from the first elastic arm, a first limiting groove is formed on the upper surface of the first protruding rib, and the protruding block of the terminal is clamped in the first limiting groove.

[0024] In a possible implementation, the terminal includes:

[0025] A terminal shell is integrally formed with a wire support at one end, and a guide frame is integrally formed at the other end of the terminal shell.

[0026] A plurality of grooves are formed on the outer surface of the terminal shell.

[0027] A pair of elastic contact plates are integrally formed on the side wall of the terminal shell.

[0028] A debris shield is integrally formed at one end of the terminal shell, and a first stopper is integrally formed at the other end of the terminal shell.

[0029] A second stopper is integrally formed on the outer surface of the terminal shell, and the second stopper is arranged at a different outer surface of the terminal shell from the grooves.

[0030] In a possible implementation, the first locking plate includes:

[0031] A first locking plate body is provided with a first terminal insertion slot.

[0032] A plurality of first limiting protruding ribs are integrally formed on the outer wall of the first locking plate body, and the first limiting protruding ribs are inserted between the first elastic arm and the plug shell.

[0033] A stop groove is formed on the side wall of the first locking plate body, and the stop groove is clamped and connected between the first limiting block and the second limiting block.

[0034] In a possible implementation, the second locking plate includes:

[0035] A second locking plate body is provided with a second terminal insertion slot.

[0036] A plurality of locking protruding ribs are integrally formed on the outer wall of the second locking plate body, and the locking protruding ribs are clamped and connected with the first protruding block or the second protruding block.

[0037] A plurality of second limiting protruding ribs are integrally formed on the outer wall of the second locking plate body, and the second limiting protruding ribs are inserted between the second elastic arm and the socket shell.

[0038] In a possible implementation, the first sealing member is a sealing ring, and a first sealing lip is arranged on the outer surface of the sealing ring.

[0039] In a possible implementation, the second sealing member is a sealing gasket, the sealing gasket is provided with a wire hole, and an outer surface of the sealing gasket is provided with a second sealing lip.

[0040] In a possible implementation, the cover plate comprises:

[0041] a cover plate body, a boss being integrally formed on the cover plate body, the boss abutting against the sealing gasket;

[0042] a terminal through slot being formed on the cover plate body and the boss.

[0043] The high-reliability waterproof connector provided by the application has the core advantages of improving the anti-falling, waterproof and anti-error performance of the product through a systematic structure. Specifically, the double locking mechanism is realized by the cooperation of the first locking piece, the first limiting block and the second limiting block or the cooperation of the locking protrusions of the locking piece, the first protrusion and the second protrusion, so that the holding force of the terminal in the vibration environment is greatly enhanced; the multiple sealing is realized by the first sealing lip, the second sealing lip and the wire hole, so that a complete waterproof barrier is formed, and the sealing reliability in a harsh environment is ensured; the effective anti-error function is realized by the anti-reverse insertion design of the second stop block of the terminal, the terminal in-place detection function of the locking piece rib position and the anti-mislocking of the second limiting block, so that the assembly yield is significantly improved and the rework is reduced; in addition, the multi-contact design of the terminal, such as the groove and the elastic contact plate, provides multiple contact points, and ensures the stability of the electrical connection in the high-vibration environment. In summary, the connector has significant improvements in reliability, safety and production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0045] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the application, should still fall within the scope of the technical content disclosed by the application.

[0046] Figure 1 A perspective view of a waterproof connector provided by the application;

[0047] Figure 2 A cross-sectional view of a waterproof connector according to the present application;

[0048] Figure 3 A perspective view of a socket, a terminal, a cover plate, and a wire according to the present application;

[0049] Figure 4 A cross-sectional view of a socket, a terminal, and a second sealing member according to the present application;

[0050] Figure 5 A top cross-sectional view of a socket according to the present application;

[0051] Figure 6 A cross-sectional view of a second locking piece, a socket, a first protrusion, and a terminal according to the present application;

[0052] Figure 7 A cross-sectional view of a second locking piece, a socket, a second protrusion, and a terminal according to the present application;

[0053] Figure 8 A cross-sectional view of a first and a second limiting block of a plug according to the present application;

[0054] Figure 9 A cross-sectional view of a socket, a terminal, and a first locking piece according to the present application;

[0055] Figure 10 A cross-sectional view of a terminal connection according to the present application;

[0056] Figure 11 A perspective view of a terminal according to the present application;

[0057] Figure 12 A schematic view of a terminal connection according to the present application;

[0058] Figure 13 A perspective view of a first locking piece according to the present application;

[0059] Figure 14 A perspective view of a second locking piece according to the present application;

[0060] Figure 15 A perspective view of a first sealing member according to the present application;

[0061] Figure 16 A perspective view of a second sealing member according to the present application;

[0062] Figure 17 A perspective view of a cover plate according to the present application;

[0063] In the figure: 1 plug; 11 plug shell; 12 terminal bin; 121 first limiting block; 122 second limiting block; 14 first elastic arm; 15 first convex rib; 151 first limiting groove; 2 socket; 21 connecting block; 22 second convex rib; 221 first convex block; 222 second limiting groove; 223 second convex block; 23 second elastic arm; 24 socket shell; 3 terminal; 31 guide frame; 32 terminal shell; 33 wire support; 34 groove; 35 elastic contact plate; 36 first stop block; 37 debris shield; 38 second stop block; 4 cover plate; 41 cover plate main body; 42 terminal through slot; 43 boss; 5 first locking piece; 51 first locking piece main body; 52 stop groove; 53 first limiting convex rib; 54 first terminal insertion slot; 6 second locking piece; 61 second locking piece main body; 62 locking convex rib; 63 second terminal insertion slot; 64 second limiting convex rib; 7 first sealing element; 71 sealing ring; 72 first sealing lip; 8 second sealing element; 81 sealing gasket; 82 wire hole; 83 second sealing lip; 9 wire. DETAILED DESCRIPTION

[0064] The embodiments of the present application will be described in detail with specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0065] Please refer to Figures 1-17 , now a waterproof connector disclosed by the present application will be described, such as Figures 1-2 , including plug 1, socket 2, terminal 3, cover plate 4, first locking piece 5, second locking piece 6, first sealing element 7, second sealing element 8 and wire 9, socket 2 is inserted with plug 1, terminal 3 is arranged in pairs, respectively inserted in socket 2 and plug 1, first locking piece 5 is in abutment with one terminal 3, first locking piece 5 is inserted in one end of plug 1 close to socket 2, second locking piece 6 is in abutment with another terminal 3, second locking piece 6 is inserted in one end of socket 2 close to plug 1, first sealing element 7 is arranged in the gap between plug 1 and socket 2, the outer surface of first sealing element 7 is in abutment with socket 2, the inner surface of first sealing element 7 is in abutment with plug 1, cover plate 4 is arranged in pairs, one cover plate 4 is inserted in the other end of plug 1, the other cover plate 4 is sleeved on the other end of socket 2, second sealing element 8 is arranged in pairs, one second sealing element 8 is arranged between cover plate 4 and plug 1, the other second sealing element 8 is arranged between cover plate 4 and socket 2, a plurality of wires 9 are arranged symmetrically, one end is inserted into terminal 3, the other end passes through the inner hole of second sealing element 8 and cover plate 4.

[0066] The use process of the embodiment of the present application is as follows: the initial state of the first locking piece 5 and the second locking piece 6 is the first locking position, that is, the stop groove 52 is clamped between the first limiting block 121 and the second limiting block 122, and the locking convex rib 62 is clamped between the first convex block 221 and the second convex block 223. First, the terminal 3 with the crimped wire 9 is inserted into the plug shell 11 and the socket shell 24 respectively, and the second stop block 38 on the terminal 3 cooperates with the second limiting groove 222 or the first limiting groove 151 on the shell to effectively prevent reverse misinsertion. After being inserted into position, the terminal is restored to the natural state by the free end of the first elastic arm 14 or the second elastic arm 23, one end of which abuts against the terminal 3 to realize locking of the terminal. Then, the first locking piece 5 and the second locking piece 6 are pushed to the second locking position. If the terminal 3 is not in position, the first limiting convex rib 53 and the second limiting convex rib 64 will push the elastic arm that is lifted up and thus cannot be installed, thereby playing a terminal position detection role. After being installed into position, the locking piece is fixed in the correct position through the clamping of the stop groove 52 and the second limiting block 122 and the cooperation of the locking convex rib 62 and the second convex block 223, and the first limiting convex rib 53 and the second limiting convex rib 64 intervene the gap between the elastic arm and the shell. Meanwhile, the first locking piece 5 can also correct and position the first sealing member 7. Then, the second sealing member 8 is installed into the tail part, the wire hole 82 tightly holds the wire 9 to form a seal, and the cover plate 4 is buckled, the boss 43 of which is used to compress the sealing gasket 81 to ensure stable sealing. Finally, the plug 1 and the socket 2 are plugged together, the two terminals 3 guide each other, a plurality of recesses 34 and elastic contact plates 35 form a plurality of reliable contact points for the two terminals 3, and the inner and outer first sealing lips 72 of the first sealing member 7 are compressed and tightly adhere to the plug and socket shells respectively to form a complete waterproof seal, thereby meeting the use requirements in a high-vibration environment and completely solving the problems of terminal disengagement and sealing failure.

[0067] In one specific embodiment, as Figures 3-7The socket 2 comprises a connecting block 21, a second protruding rib 22, a second protruding block 223, a first protruding block 221, a second limiting slot 222, a second elastic arm 23 and a socket shell 24. The connecting block 21 is connected to the upper and lower inner walls of the socket shell 24. The second protruding ribs 22 are integrally formed on the outer wall of the connecting block 21. The upper surface of the second protruding rib 22 is integrally formed with the first protruding block 221 and the second protruding block 223. The first protruding block 221 and the second protruding block 223 are arranged on different second protruding ribs 22 respectively. The lower surface of the second protruding rib 22 is provided with the second limiting slot 222. The protruding block of the terminal 3 is clamped in the second limiting slot 222. The second elastic arm 23 is installed on the inner wall of the socket shell 24 and abuts against the side wall of the terminal 3. The socket 2 is supported by the socket shell 24 as the base. The connecting block 21 on the upper and lower inner walls of the socket shell 24 provides an installation platform for the internal functional parts. The second protruding ribs 22 integrally formed on the outer wall of the connecting block 21 not only enhance the overall structure, but also provide guidance for the movement of the second locking piece 6. The first protruding block 221 or the second protruding block 223 formed on the upper surface of each protruding rib serves as a locking structure and is engaged with the locking protrusion 62 of the second locking piece 6 in stages to accurately define and lock the primary and secondary locking positions. The second limiting slot 222 formed on the lower surface of the protruding rib is in a foolproof cooperation with the V-shaped second stop block 38 of the terminal 3 to effectively prevent the terminal from being inserted in the reverse direction by shape interlocking. The second elastic arm 23 installed on the inner wall of the socket shell is the core component for locking the terminal. After the terminal is correctly positioned, the second elastic arm 23 elastically clamps the terminal 3 to provide a primary holding force. When the terminal is not in place, the second elastic arm 23 triggers the locking piece installation interference to realize the terminal position detection function. These components cooperatively realize the terminal guidance, anti-misinsertion, primary locking, secondary locking linkage and assembly state detection.

[0068] In one specific embodiment, as Figures 8-9The plug 1 comprises a plug shell 11, a terminal bin 12, a first limiting block 121, a second limiting block 122, a first elastic arm 14, a first convex rib 15 and a first limiting groove 151. The terminal bin 12 extends from the inner wall of the plug shell 11. The first limiting block 121 and the second limiting block 122 are integrally formed on the outer wall of the terminal bin 12. The first limiting block 121 and the second limiting block 122 are not in the same straight line in the vertical direction. The first elastic arm 14 is installed on the inner wall of the plug shell 11 and abuts against the side wall of the terminal 3. The first convex rib 15 is installed on the inner wall of the plug shell 11. The first convex rib 15 is arranged on a different horizontal plane from the first elastic arm 14. The first limiting groove 151 is formed on the upper surface of the first convex rib 15. The convex block of the terminal 3 is clamped in the first limiting groove 151. The structure of the plug 1 takes the plug shell 11 as the main body. The terminal bin 12 extending in the plug shell 11 forms a cavity for accommodating the terminal 3. The first elastic arm 14 installed on the inner wall of the shell is a key component for realizing terminal locking. After the terminal is correctly inserted, the elastic buckle provides primary holding force. The first convex rib 15 arranged in layers with the first elastic arm 14 not only plays a role in strengthening the structure, but also forms shape interlocking with the second stop block 38 (V-shaped protrusion) of the terminal 3 through the first limiting groove 151 formed on the upper surface, which is a foolproof mechanism to prevent reverse insertion of the terminal. The first limiting block 121 and the second limiting block 122 integrally formed on the outer wall of the terminal bin 12 are bosses specially designed for locking the first locking piece 5. The first limiting block 121 with a large guide slope ensures smooth installation of the locking piece to the first locking position. The second limiting block 122 with a small guide slope and a locking plane ensures that the locking piece is stably stopped at the second locking position, providing strong locking force and effectively preventing the locking piece from being shaken out or accidentally collided, thereby ensuring the absolute reliability of the secondary locking state.

[0069] In one specific embodiment, as Figures 10-12, the terminal 3 includes a guide frame 31, a terminal shell 32, a wire support 33, a groove 34, an elastic contact plate 35, a first stop block 36, a debris shield 37, and a second stop block 38, one end of the terminal shell 32 is integrally formed with the wire support 33, the other end of the terminal shell 32 is integrally formed with the guide frame 31, a plurality of grooves 34 are formed on the outer surface of the terminal shell 32, the elastic contact plates 35 are arranged in pairs and integrally formed on the side wall of the terminal shell 32, the debris shield 37 is integrally formed on one end of the terminal shell 32, the other end of the terminal shell 32 is integrally formed with the first stop block 36, and the second stop block 38 is integrally formed on the outer surface of the terminal shell 32, and the second stop block 38 is arranged on the outer surface of the terminal shell 32 different from the groove 34. The guide frame 31 at the head of the terminal 3 adopts a square structure similar to a Chinese character, which provides a basis for core function implementation: it not only provides smooth guidance for the insertion of male and female terminals, but also effectively supports the deformation caused by clamping on both sides during insertion, preventing interface damage. The terminal shell 32, as the main structure of the entire terminal, is the carrier of all other features, and the cavity inside ensures the space for cooperation with other terminals. The elastic contact plates 35 integrally formed on the side wall of the terminal shell 32 and the grooves 34 formed on the surface together constitute multiple contact points. After the male and female terminals are inserted, the elastic contact plates 35 and grooves 34 of both sides and the guide frame 31 area of the other party interlock to form several contact points. This redundant design ensures that even in high-vibration and harsh environments, it can still provide extremely stable and reliable electrical connections. The number of groove 34 structures can be adjusted according to the application level to balance cost and performance. The wire support 33 at the tail is used to support the wire 9, and its solid design can offset the stress generated during riveting, preventing stress from being transmitted to the precision contact part at the front end, causing deformation. The first stop block 36 and the second stop block 38 cooperate with the limiting groove on the connector shell to jointly limit the activity gap of the terminal, ensuring that the terminal is in the best working position. Among them, the V-shaped protruding structure of the second stop block 38 is a key foolproof design, which cooperates with the groove on the shell to effectively identify and physically prevent the terminal from being inserted 180° in reverse, fundamentally avoiding installation errors. In addition, the debris shield 37 at one end of the terminal plays an important protective role, which can block larger foreign matter from falling into the internal cavity of the terminal shell 32, preventing possible short circuit or poor contact failure. Finally, the terminal 3 adopts a male and female integrated structure, unlike traditional connectors that require separate manufacturing and assembly of male and female terminals, this design can realize the docking function through the same structure of the terminal 3. Specifically, the head is a guide frame 31 with guiding and supporting functions, when docking, two identical terminals 3 are inserted into each other, and the elastic contact plates 35 and grooves 34 on them form multiple reliable electrical contact points on the surface of the guide frame 31 of the other terminal. This design fundamentally reduces one type of terminal, avoids confusion errors that may occur during production, storage, and assembly, and significantly reduces material management costs and assembly complexity.

[0070] In one specific embodiment, as Figure 13 , the first locking piece 5 comprises a first locking piece body 51, a stop groove 52, first limiting protrusions 53 and a first terminal insertion slot 54. The first terminal insertion slot 54 is formed in the first locking piece body 51. The first limiting protrusions 53 are integrally formed on the outer wall of the first locking piece body 51 and are inserted between the first elastic arm 14 and the plug housing 11. The stop groove 52 is formed in the side wall of the first locking piece body 51 and is clamped between the first limiting block 121 and the second limiting block 122. The first locking piece body 51 of the first locking piece 5 constitutes a carrier, and the first terminal insertion slot 54 formed therein allows the terminal 3 that has been installed in place to pass smoothly. The specific planar structure of the body interacts with the first sealing member 7, which can correct the sealing ring in the wrong position during installation and axially fix it by the planar mutual top in the final position, preventing it from falling out. The mechanical locking function of the locking piece is realized by the stop groove 52, which is clamped with the first limiting block 121 and the second limiting block 122 on the plug housing 11, respectively, to firmly lock the locking piece itself in the first locking position or the secondary locking position. Its unique size and slope design takes into account the smoothness of installation and the stability of anti-vibration and misoperation. In addition, the first limiting protrusions 53 are the key to multifunctional design, which accurately position the locking piece in the plug housing in horizontal and vertical directions; when the terminal is not in place, it will push against the first elastic arm 14 to physically block the installation of the locking piece, providing intuitive error feedback.

[0071] In one specific embodiment, as Figure 14The second locking piece 6 comprises a second locking piece body 61, locking protrusions 62, a second terminal insertion slot 63, and second limiting protrusions 64. The second locking piece body 61 is provided with the second terminal insertion slot 63. The locking protrusions 62 are integrally formed on the outer wall of the second locking piece body 61 and are in engagement with the protrusions 221. The second limiting protrusions 64 are integrally formed on the outer wall of the second locking piece body 61 and are inserted between the second elastic arm 23 and the socket shell 24. The second locking piece body 61 of the second locking piece 6 serves as a structural base. If the terminal is incorrectly positioned, the insertion slot cannot be aligned, thereby physically blocking the installation of the locking piece and providing immediate error feedback for the operator. The locking function of the locking piece is realized by the engagement of the locking protrusions 62 on the locking piece with the protrusions on the socket shell 24. The matching structure of the protrusions and the protrusions constitutes a reliable two-stage locking mechanism, which can stably keep the second locking piece 6 in the predetermined working position and prevent it from falling off due to vibration or accidental pulling, thereby ensuring the long-term reliability of the locked state. In addition, the second limiting protrusions 64 provide accurate guidance and positioning for the installation of the second locking piece 6 in the socket shell 24, thereby ensuring the smoothness of the operation and the accuracy of the final position. After final locking, it cooperates with the second elastic arm 23 to form a safety barrier: when the terminal is subjected to an abnormal pulling force, the force will be transmitted to the elastic arm to make it tend to turn upward, and at this time the second limiting protrusions 64 will firmly push the elastic arm, greatly enhancing the holding force of the terminal against pulling off and improving the reliability of the connector in harsh environments.

[0072] In a specific embodiment, as shown in Figure 15 The first sealing member 7 is a sealing ring 71, and the outer surface of the sealing ring 71 is provided with a first sealing lip 72. The first sealing member 7, i.e., the sealing ring 71, is a core element for ensuring the waterproofness of the connector interface. The outer surface of the sealing ring 71 is provided with the first sealing lip 72, which is composed of a plurality of protruding rib positions. When the plug and the socket are completely plugged, the sealing ring is compressed, at which time the inner rib positions of the sealing ring are tightly attached to the surface of the plug shell 11, and the outer rib positions are in interference fit with the inner wall of the socket shell 24, thereby forming a tight contact. This multi-lip design establishes a solid and redundant sealing barrier.

[0073] In a specific embodiment, as shown in Figure 16The second sealing member 8 is a sealing gasket 81, which is provided with a wire hole 82, and the outer surface of the sealing gasket 81 is provided with a second sealing lip 83. The function of the second sealing member 8, i.e. the sealing gasket 81, is to prevent water from entering from the wire inlet. The outer surface of the sealing gasket 81 is provided with the second sealing lip 83, which is composed of a plurality of protruding ribs, so that it can form an interference fit with the inner hole of the tail of the socket shell 24 or the plug shell 11, thereby achieving the first radial sealing. At the same time, the wire hole 82 provided on the sealing gasket 81 has a protruding shape on the hole wall, which can form an interference fit with the outer diameter of the wire 9 passing through, thereby achieving the second radial sealing and effectively blocking the path of water penetration along the surface of the wire. Finally, the sealing gasket 81 is pressed and fixed by the cover plate 4, thereby forming a stable and reliable sealing system, which meets the waterproof performance requirements of the terminal and the wire after being assembled as a whole.

[0074] In a specific embodiment, as Figure 17 The cover plate 4 includes a cover plate body 41, a terminal through slot 42 and a boss 43. The boss 43 is integrally formed on the cover plate body 41, and the terminal through slot 42 is provided on the cover plate body 41 and the boss 43. The cover plate body 41 of the cover plate 4 serves as a whole base, which provides the main mechanical connection and coverage through the snap-fit structure with the shell. The terminal through slot 42 provided on the main body is a key channel, which is precisely designed in size to allow the wire 9 that has completed the connection to pass through smoothly. The boss 43 is an execution structure for the cover plate 4 to realize its sealing protection function, which is a flat or block feature protruding from the inner surface of the cover plate body 41. When the cover plate 4 is installed to the tail of the socket shell 24 or the plug shell 11 and is snapped, the boss 43 will precisely press the second sealing member 8 at the rear, ensuring that the sealing gasket 81 will not move axially or be distorted in its installation slot, so that the second sealing lip 83 on the outer side and the wire hole 82 on the inner side of the sealing gasket 81 can maintain stable and sufficient interference contact with the shell and the wire, and finally reliably achieve the rear waterproofing.

[0075] Although the present application has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of protection claimed by the present application.

Claims

1. A waterproof connector characterized by comprising: The utility model relates to a plug (1) and socket (2) are inserted, terminal (3) is arranged in pairs and is inserted in the plug (1) and the socket (2) respectively, first lock piece (5) is inserted in the one end of the plug (1) close to the socket (2) and is in contact with one terminal (3), second lock piece (6) is inserted in the one end of the socket (2) close to the plug (1) and is in contact with another terminal (3), first sealing element (7) is arranged in the gap between the plug (1) and the socket (2), the outer surface of first sealing element (7) is in contact with the socket (2), and the inner surface of first sealing element (7) is in contact with the plug (1), cover plate (4) is arranged in pairs, one cover plate (4) is inserted in the other end of the plug (1), and another cover plate (4) is sleeved in the other end of the socket (2), second sealing element (8) is arranged in pairs, one second sealing element (8) is arranged between the cover plate (4) and the plug (1), and another second sealing element (8) is arranged between the cover plate (4) and the socket (2), a plurality of wires (9) are symmetrically arranged, one end is inserted in the terminal (3), and the other end passes out of the inner hole of second sealing element (8) and cover plate (4). The utility model relates to a plug (1) and socket (2) are inserted, terminal (3) is arranged in pairs and is inserted in the plug (1) and the socket (2) respectively, first lock piece (5) is inserted in the one end of the plug (1) close to the socket (2) and is in contact with one terminal (3), second lock piece (6) is inserted in the one end of the socket (2) close to the plug (1) and is in contact with another terminal (3), first sealing element (7) is arranged in the gap between the plug (1) and the socket (2), the outer surface of first sealing element (7) is in contact with the socket (2), and the inner surface of first sealing element (7) is in contact with the plug (1), cover plate (4) is arranged in pairs, one cover plate (4) is inserted in the other end of the plug (1), and another cover plate (4) is sleeved in the other end of the socket (2), second sealing element (8) is arranged in pairs, one second sealing element (8) is arranged between the cover plate (4) and the plug (1), and another second sealing element (8) is arranged between the cover plate (4) and the socket (2), a plurality of wires (9) are symmetrically arranged, one end is inserted in the terminal (3), and the other end passes out of the inner hole of second sealing element (8) and cover plate (4). The utility model relates to a plug (1) and socket (2) are inserted, terminal (3) is arranged in pairs and is inserted in the plug (1) and the socket (2) respectively, first lock piece (5) is inserted in the one end of the plug (1) close to the socket (2) and is in contact with one terminal (3), second lock piece (6) is inserted in the one end of the socket (2) close to the plug (1) and is in contact with another terminal (3), first sealing element (7) is arranged in the gap between the plug (1) and the socket (2), the outer surface of first sealing element (7) is in contact with the socket (2), and the inner surface of first sealing element (7) is in contact with the plug (1), cover plate (4) is arranged in pairs, one cover plate (4) is inserted in the other end of the plug (1), and another cover plate (4) is sleeved in the other end of the socket (2), second sealing element (8) is arranged in pairs, one second sealing element (8) is arranged between the cover plate (4) and the plug (1), and another second sealing element (8) is arranged between the cover plate (4) and the socket (2), a plurality of wires (9) are symmetrically arranged, one end is inserted in the terminal (3), and the other end passes out of the inner hole of second sealing element (8) and cover plate (4). The utility model relates to a plug (1) and socket (2) are inserted, terminal (3) is arranged in pairs and is inserted in the plug (1) and the socket (2) respectively, first lock piece (5) is inserted in the one end of the plug (1) close to the socket (2) and is in contact with one terminal (3), second lock piece (6) is inserted in the one end of the socket (2) close to the plug (1) and is in contact with another terminal (3), first sealing element (7) is arranged in the gap between the plug (1) and the socket (2), the outer surface of first sealing element (7) is in contact with the socket (2), and the inner surface of first sealing element (7) is in contact with the plug (1), cover plate (4) is arranged in pairs, one cover plate (4) is inserted in the other end of the plug (1), and another cover plate (4) is sleeved in the other end of the socket (2), second sealing element (8) is arranged in pairs, one second sealing element (8) is arranged between the cover plate (4) and the plug (1), and another second sealing element (8) is arranged between the cover plate (4) and the socket (2), a plurality of wires (9) are symmetrically arranged, one end is inserted in the terminal (3), and the other end passes out of the inner hole of second sealing element (8) and cover plate (4). The utility model relates to a plug (1) and socket (2) are inserted, terminal (3) is arranged in pairs and is inserted in the plug (1) and the socket (2) respectively, first lock piece (5) is inserted in the one end of the plug (1) close to the socket (2) and is in contact with one terminal (3), second lock piece (6) is inserted in the one end of the socket (2) close to the plug (1) and is in contact with another terminal (3), first sealing element (7) is arranged in the gap between the plug (1) and the socket (2), the outer surface of first sealing element (7) is in contact with the socket (2), and the inner surface of first sealing element (7) is in contact with the plug (1), cover plate (4) is arranged in pairs, one cover plate (4) is inserted in the other end of the plug (1), and another cover plate (4) is sleeved in the other end of the socket (2), second sealing element (8) is arranged in pairs, one second sealing element (8) is arranged between the cover plate (4) and the plug (1), and another second sealing element (8) is arranged between the cover plate (4) and the socket (2), a plurality of wires (9) are symmetrically arranged, one end is inserted in the terminal (3), and the other end passes out of the inner hole of second sealing element (8) and cover plate (4). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The waterproof connector according to claim 1, wherein ​ The plug shell (11) has an inner wall extending with a terminal bin (12), the outer wall of the terminal bin (12) is integrally formed with a first limiting block (121) and a second limiting block (122), the first limiting block (121) and the second limiting block (122) are not in the same straight line in the vertical direction; A first elastic arm (14) is installed on the inner wall of the plug shell (11) and abuts against the side wall of the terminal (3); A first convex rib (15) is installed on the inner wall of the plug shell (11), the first convex rib (15) is arranged on a different horizontal plane from the first elastic arm (14), the upper surface of the first convex rib (15) is provided with a first limiting groove (151), and the convex block of the terminal (3) is clamped in the first limiting groove (151).

3. The waterproof connector of claim 2, wherein, The first locking piece (5) comprises: A first locking piece body (51) is provided with a first terminal insertion slot (54); A plurality of first limiting convex ribs (53) are integrally formed on the outer wall of the first locking piece body (51), and the first limiting convex ribs (53) are inserted between the first elastic arm (14) and the plug shell (11); A stop groove (52) is provided on the side wall of the first locking piece body (51), and the stop groove (52) is clamped and connected between the first limiting block (121) and the second limiting block (122).

4. The waterproof connector of claim 1, wherein, The second locking piece (6) comprises: A second locking piece body (61) is provided with a second terminal insertion slot (63); A plurality of locking convex ribs (62) are integrally formed on the outer wall of the second locking piece body (61), and the locking convex ribs (62) are clamped and connected with the first convex block (221) or the second convex block (223); A plurality of second limiting convex ribs (64) are integrally formed on the outer wall of the second locking piece body (61), and the second limiting convex ribs (64) are inserted between the second elastic arm (23) and the socket shell (24).

5. The waterproof connector of claim 1, wherein, The first sealing element (7) is a sealing ring (71), and the outer surface of the sealing ring (71) is provided with a first sealing lip (72).

6. The waterproof connector of claim 1, wherein, The second sealing element (8) is a sealing gasket (81), the sealing gasket (81) is provided with a wire hole (82), and the outer surface of the sealing gasket (81) is provided with a second sealing lip (83).

7. The waterproof connector of claim 6, wherein, The cover plate (4) comprises: A cover plate body (41) is integrally formed with a boss (43), and the boss (43) abuts against the sealing gasket (81); A terminal through slot (42) is provided on the cover plate body (41) and the boss (43).

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