Self-locking waterproof connector

Abstract

The utility model belongs to the technical field of charging connector, especially, relate to a self -locking waterproof connector, include: plug including first main part, positive pole pin and negative pole pin, positive pole pin, negative pole pin all are worn in first main part, the length of positive pole pin is greater than the length of negative pole pin, socket includes second main part and power terminal, power terminal has two and respectively with positive pole pin, negative pole pin plug-in cooperation, power terminal is worn in second main part, the outer periphery of socket is spaced apart and is provided with a plurality of first clamping pieces, the lock ring is rotatably arranged on the first main part, the inner wall of the lock ring is spaced apart and is provided with a plurality of second clamping pieces with the cooperation of first clamping piece. The connector is designed through the positive pole pin longer than the negative pole pin, realizes the positive pole pin in the connector in the process of plugging and unplugging first than the negative pole pin and power terminal contact conduction, this helps to protect the circuit, avoids short circuit.

Description

Technical Field

[0001] This application relates to the field of charging connector technology, and in particular to a self-locking waterproof connector. Background Technology

[0002] Charging connectors are widely used in electric vehicles and industrial equipment to enable rapid power transmission. Because they are often used outdoors or in complex environments, these connectors must possess excellent waterproofing and connection reliability.

[0003] Existing charging connectors typically use elastic snaps or button-type hook structures for locking. However, in scenarios involving frequent plugging and unplugging, these locking structures are prone to reduced locking force due to mechanical fatigue or wear, causing the plug and socket connection to loosen. Connector instability not only leads to increased contact resistance and overheating but also prevents the waterproof sealing structure from fitting tightly, potentially causing water ingress and short circuits, posing safety hazards. Therefore, there is an urgent need for a waterproof connector that achieves stable self-locking through a locking ring structure and is easy to operate.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this application provides a self-locking waterproof connector.

[0006] This application provides a self-locking waterproof connector, the connector comprising: The plug includes a first body, a positive pin and a negative pin. Both the positive pin and the negative pin are inserted into the first body, and the length of the positive pin is greater than the length of the negative pin. The socket includes a second body and power terminals. The power terminals are two in number and are respectively connected to a positive pin and a negative pin. The power terminals are inserted into the second body. Multiple first snap-fit ​​parts are provided at intervals along the outer periphery of the socket. A locking ring is rotatably mounted on the first body, and the inner wall of the locking ring is provided with a plurality of second locking members that cooperate with the first locking member.

[0007] This connector features a design where the positive pin is longer than the negative pin. This ensures that the positive pin contacts the power terminal before the negative pin during insertion and removal, helping to protect the circuit and prevent short circuits. Simultaneously, the second locking element on the locking ring engages with the first locking element on the socket to achieve mechanical self-locking, preventing the connector from detaching due to external pulling during use.

[0008] In some possible implementations, a receiving groove is provided on the first body along the circumferential direction; the inner wall of the locking ring is provided with a sliding member that slides in conjunction with the receiving groove; the connector also includes a spring, which is placed in the receiving groove, with one end of the spring abutting against the sliding member and the other end of the spring abutting against the inner wall of the receiving groove.

[0009] In some possible implementations, the receiving groove has an inlet on the side wall facing the socket, and the bottom wall of the receiving groove near the inlet has a limiting member that cooperates with the sliding member for limiting.

[0010] In some possible implementations, the surface of the limiting member facing the locking ring is inclined.

[0011] In some possible implementations, an inlet groove and a slot are formed between two adjacent first latching members, the inlet groove and the slot being arranged along the axial direction of the socket, and the second latching member of the locking ring is configured to enter the slot through the inlet groove, thereby achieving axial contact between the second latching member and the first latching member.

[0012] In some possible implementations, the end face of the first latching member facing the locking ring is a first sliding ramp, and the end face of the second latching member facing the socket is a second sliding ramp that mates with the first sliding ramp.

[0013] In some possible implementations, a guide groove is provided on the first body along the circumferential direction; the inner wall of the locking ring is provided with a guide block that cooperates with the guide groove.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the self-locking waterproof connector provided in the embodiments of this application; Figure 2 yes Figure 1 Internal structure diagram of the self-locking waterproof connector; Figure 3 yes Figure 1 Exploded view of the locking ring and plug; Figure 4 yes Figure 1 A schematic diagram of the middle plug structure; Figure 5 yes Figure 1A schematic diagram of the structure of the middle socket; In the diagram: 100, plug; 110, first main body; 120, positive pin; 130, negative pin; 140, waterproof ring; 111. Main body cylindrical section; 112. External mating part; 113. First internal mounting part; 1121. Receiving slot; 1122. Inlet; 1123. Limiting element; 1124. Guide slot; 200. Socket; 210. Second body; 220. Power terminal; 230. Waterproof pad; 211. Insert sleeve; 212. Cable cavity; 213. Flange; 214. Second inner mounting part; 2111, First card connector; 2112, Inlet slot; 2113, Card slot; 300, Locking ring; 310, Second locking component; 320, Sliding component; 330, Guide block; 400, Spring; Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0018] like Figures 1 to 5 As shown, this embodiment provides a self-locking waterproof connector, which includes a plug 100, a socket 200, and a locking ring 300.

[0019] The plug 100 includes a first body 110, a positive pin 120 and a negative pin 130. The positive pin 120 and the negative pin 130 are both inserted into the first body 110. The length of the positive pin 120 is greater than the length of the negative pin 130.

[0020] The first body 110 is a plastic insulating component. The first body 110 may include a main body cylindrical portion 111, an outer mating portion 112, and a first inner mounting portion 113. The outer mating portion 112 is sleeved on the outer peripheral surface of the main body cylindrical portion 111 and extends radially along the main body cylindrical portion 111. The first inner mounting portion 113 is disposed in the inner cavity of the main body cylindrical portion 111.

[0021] A waterproof ring 140 is fitted onto the main body cylindrical portion 111. The waterproof ring 140 is fitted onto the end of the main body cylindrical portion 111 near the outer mating portion 112. When the plug 100 is inserted into the socket 200, part of the main body cylindrical portion 111 is inserted into the socket 200, and the waterproof ring 140 is pressed against the outer mating portion 112 by the socket 200, thus preventing water from entering the connector.

[0022] The first inner mounting portion 113 is a component that provides mounting positions for the positive electrode pin 120 and the negative electrode pin 130. The first inner mounting portion 113 is a cylindrical structure, and the positive electrode pin 120 and the negative electrode pin 130 pass through the first inner mounting portion 113.

[0023] The outer mating part 112 is a component that mates with the locking ring 300. The outer mating part 112 is a circular ring structure.

[0024] The socket 200 includes a second body 210 and a power terminal 220. The power terminal 220 has two terminals and is respectively connected to the positive pin 120 and the negative pin 130. The power terminal 220 passes through the second body 210. A plurality of first snap-fit ​​pieces 2111 are provided at intervals along the outer periphery of the socket 200.

[0025] The second body 210 is a plastic insulating component. The second body 210 may include a plug-in sleeve portion 211, a wire cavity portion 212, a flange portion 213 disposed at the connection between the plug-in sleeve portion 211 and the wire cavity portion 212, and a second inner mounting portion 214. The insertion sleeve 211 is a component that can partially insert and mate with the main body cylindrical part 111. A plurality of first snap-fit ​​members 2111 are provided at intervals on the outer peripheral surface of the insertion sleeve 211. It can be understood that the outer peripheral surface of the insertion sleeve 211 has a plurality of protruding first snap-fit ​​members 2111.

[0026] The first locking member 2111 is a component that secures itself to the locking ring 300. There can be two, three, four or more first locking members 2111. In this embodiment, there are four first locking members 2111.

[0027] Flange 213 is a component that allows the socket 200 to be fixed to the electrical appliance panel. Flange 213 has multiple mounting holes, and it is fixed to the electrical appliance panel by screws through these mounting holes.

[0028] A waterproof gasket 230 is provided on the surface of the flange 213 facing away from the plug 100. The waterproof gasket 230 can prevent moisture and dust from entering the electrical equipment through the gap of the flange 213. The waterproof gasket 230 is partially fitted onto the wire cavity 212.

[0029] The second inner mounting portion 214 is a component that provides a mounting position for the power terminal 220. Part of the second inner mounting portion 214 is located inside the wire cavity portion 212, and part of the second inner mounting portion 214 is located inside the plug sleeve portion 211. The power terminal 220 passes through the second inner mounting portion 214.

[0030] The locking ring 300 is rotatably mounted on the first body 110, and the inner wall of the locking ring 300 is provided with a plurality of second locking members 310 that cooperate with the first locking member 2111.

[0031] The locking ring 300 is a component that enables the plug 100 and the socket 200 to lock themselves together. The locking ring 300 is fitted onto the outer mating part 112.

[0032] The second snap-fit ​​member 310 is a component that snaps into and engages with the first snap-fit ​​member 2111. The second snap-fit ​​member 310 is in the shape of a protrusion or a rib. There can be two, three, four or more second snap-fit ​​members 310. In this embodiment, there are four second snap-fit ​​members 310, which corresponds to the number of first snap-fit ​​members 2111.

[0033] In this embodiment, the self-locking waterproof connector is inserted by aligning the first body 110 of the plug 100 with the second body 210 of the socket 200. Since the positive pin 120 is longer than the negative pin 130, the positive pin 120 will preferentially contact the corresponding power terminal 220 inside the socket 200, followed by the negative pin 130. During insertion, the locking ring 300 rotates, and the second snap-fit ​​member 310 on the inner wall of the locking ring 300 rotates accordingly, engaging or abutting against the first snap-fit ​​member 2111 on the outer periphery of the socket 200, thereby locking the plug 100 and the socket 200 together.

[0034] The self-locking waterproof connector provided in this embodiment features a design where the positive pin 120 is longer than the negative pin 130. This design ensures that during insertion and removal, the positive pin 120 contacts the power terminal 220 before the negative pin 130, thus protecting the circuit and preventing short circuits. Simultaneously, the second locking member 310 on the locking ring 300 engages with the first locking member 2111 on the socket 200 to achieve mechanical self-locking, preventing the connector from detaching due to external pulling during use.

[0035] like Figures 1 to 5 As shown, in some embodiments, a receiving groove 1121 is provided on the first body 110 along the circumferential direction; the inner wall of the locking ring 300 is provided with a sliding member 320 that slides in cooperation with the receiving groove 1121; the connector also includes a spring 400, which is placed in the receiving groove 1121, with one end of the spring 400 abutting against the sliding member 320 and the other end of the spring 400 abutting against the inner wall of the receiving groove 1121.

[0036] The first main body 110 is provided with a receiving groove 1121 along the circumferential direction. It can be understood that the outer mating part 112 is provided with a receiving groove 1121 along the circumferential direction of the first main body 110. The receiving groove 1121 is an arc-shaped groove.

[0037] When the plug 100 mates with the socket 200, the locking ring 300 rotates, and the sliding member 320 compresses the spring 400, accumulating elastic potential energy. When locked in place, the spring force of the spring 400 is released and acts on the sliding member 320, causing the sliding member 320 to return to its original position. At this time, the first locking member 2111 and the second locking member 310 abut against each other, and the plug 100 and the socket 200 retract.

[0038] During the unlocking process of the locking ring 300, the operator rotates the locking ring 300, causing the sliding member 320 to compress the spring 400 and accumulate elastic potential energy. At this time, the first locking member 2111 and the second locking member 310 are misaligned in the axial direction of the connector, allowing the plug 100 to be pulled out of the socket 200. After the plug 100 is completely pulled out, the operator releases the locking ring 300, releasing the elastic force of the spring 400 and acting on the sliding member 320 to reset it.

[0039] like Figures 1 to 5 As shown, in some embodiments, the receiving groove 1121 has an inlet 1122 on one side wall facing the socket 200, and the bottom wall of the receiving groove 1121 near the inlet 1122 has a limiting member 1123 that cooperates with the sliding member 320 for limiting.

[0040] Understandably, a notch is provided as an inlet 1122 on the side wall of the receiving groove 1121 facing the socket 200. This inlet 1122 connects the receiving groove 1121 to the outside, allowing the slider 320 of the locking ring 300 to be pushed into the groove.

[0041] Understandably, a protruding limiting member 1123 is provided on the bottom wall of the receiving groove 1121, near the aforementioned inlet 1122. This limiting member 1123 is configured to engage with the sliding member 320 for limiting.

[0042] When assembling the plug 100 and the locking ring 300, the locking ring 300 is placed on the first body 110 and aligned so that the sliding member 320 enters the receiving groove 1121 through the inlet 1122 above the limiting member 1123. The locking ring 300 is then rotated to allow the sliding member 320 to slide into the receiving groove 1121. Due to the blocking effect of the limiting member 1123, the sliding member 320 can only slide along the receiving groove 1121 and stops after contacting the limiting member 1123. Therefore, the sliding member 320 cannot easily exit from the inlet 1122 in the opposite direction.

[0043] like Figures 1 to 5As shown, in some embodiments, the surface of the limiting member 1123 facing the locking ring 300 is inclined.

[0044] During assembly, when the slider 320 of the locking ring 300 is pushed in through the inlet 1122 and contacts the limiting member 1123, the slider 320 can climb up the inclined surface and pass over the limiting member 1123 due to the guiding effect of the inclined surface. Once it passes over, the slider 320 falls into the receiving groove 1121. If it attempts to exit in the opposite direction, it will be blocked by the vertical surface of the limiting member 1123.

[0045] like Figures 1 to 5 As shown, in some embodiments, an inlet groove 2112 and a slot 2113 are formed between two adjacent first latching members 2111. The inlet groove 2112 and the slot 2113 are arranged along the axial direction of the socket 200. The second latching member 310 of the locking ring 300 is configured to enter the slot 2113 through the inlet groove 2112, thereby achieving axial contact between the second latching member 310 and the first latching member 2111.

[0046] It is understandable that the inlet slot 2112 and the card slot 2113 are formed on the plug sleeve portion 211.

[0047] During connection, first align the second locking member 310 of the locking ring 300 with the entry groove 2112 on the socket 200, and push the plug 100 axially so that the second locking member 310 passes through the entry groove 2112 to the bottom. Then, the locking ring 300 rotates, causing the second locking member 310 to slide circumferentially into the locking groove 2113. At this point, the second locking member 310 is axially blocked by the first locking member 2111.

[0048] like Figures 1 to 5 As shown, in some embodiments, the end face of the first latching member 2111 facing the locking ring 300 is a first sliding slope, and the end face of the second latching member 310 facing the socket 200 is a second sliding slope that cooperates with the first sliding slope.

[0049] When the plug 100 is inserted into the socket 200, the second sliding slope of the second locking member 310 contacts and slides relative to the first sliding slope of the first locking member 2111, causing the locking ring 300 to rotate without operator intervention. When the plug is fully inserted, the second sliding slope of the second locking member 310 disengages from the first sliding slope of the first locking member 2111, and the locking ring 300 rotates in the opposite direction. This causes the second locking member 310 to be axially blocked by the first locking member 2111, thus securing the locking ring 300 to the socket 200.

[0050] like Figures 1 to 5As shown, in some embodiments, a guide groove 1124 is provided on the first body 110 along the circumferential direction; the inner wall of the locking ring 300 is provided with a guide block 330 that cooperates with the guide groove 1124. The cooperation between the guide block 330 and the guide groove 1124 ensures the rotational stability of the locking ring 300.

[0051] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0054] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0056] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A self-locking waterproof connector, characterized in that, The connector includes: A plug, comprising a first body, a positive pin and a negative pin, wherein the positive pin and the negative pin are both inserted into the first body, and the length of the positive pin is greater than the length of the negative pin; The socket includes a second body and power terminals. The power terminals are two in number and are respectively connected to the positive pin and the negative pin. The power terminals are inserted into the second body. A plurality of first snap-fit ​​parts are provided at intervals along the outer periphery of the socket. A locking ring is rotatably disposed on the first body, and the inner wall of the locking ring is provided with a plurality of second locking members that cooperate with the first locking member.

2. The self-locking waterproof connector according to claim 1, characterized in that, The first main body is provided with a receiving groove along the circumferential direction; The inner wall of the locking ring is provided with a sliding element that slides in conjunction with the receiving groove; The connector also includes a spring, which is placed in the receiving groove. One end of the spring abuts against the sliding member, and the other end of the spring abuts against the inner wall of the receiving groove.

3. The self-locking waterproof connector according to claim 2, characterized in that, The receiving groove has an inlet on one side wall facing the socket, and the bottom wall of the receiving groove near the inlet has a limiting member that cooperates with the sliding member.

4. The self-locking waterproof connector according to claim 3, characterized in that, The surface of the limiting member facing the locking ring is inclined.

5. The self-locking waterproof connector according to claim 1, characterized in that, An inlet groove and a slot are formed between two adjacent first snap-fit ​​members. The inlet groove and the slot are arranged along the axial direction of the socket. The second snap-fit ​​member of the locking ring is configured to enter the slot through the inlet groove, thereby achieving axial contact between the second snap-fit ​​member and the first snap-fit ​​member.

6. The self-locking waterproof connector according to claim 1, characterized in that, The end face of the first snap-fit ​​member facing the locking ring is a first sliding slope, and the end face of the second snap-fit ​​member facing the socket is a second sliding slope that cooperates with the first sliding slope.

7. The self-locking waterproof connector according to claim 1, characterized in that, The first main body is provided with a guide groove along the circumferential direction; The inner wall of the locking ring is provided with a guide block that mates with the guide groove.

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