Self-locking insertion end structure and electrical connector

Abstract

The invention relates to a self-locking plug end structure and an electrical connector, the self-locking plug end structure comprises a plug core part, a first shell and a locking sleeve, the first shell is provided with a first accommodating cavity and accommodating grooves, the accommodating grooves are distributed in one or more areas of the peripheral side of the first accommodating cavity, the plug core part is arranged in the first accommodating cavity in a penetrating manner, the first shell is provided with an inverted buckling part, and the locking sleeve is arranged in the first accommodating cavity. The inverted buckling part is of a partial structure which is encircled to form an accommodating groove; the locking sleeve is located in the first shell and comprises a sleeve piece and a spring bolt, the spring bolt is an elastic body, the spring bolt is connected with the sleeve piece and extends in the direction away from the sleeve piece, the sleeve piece is arranged outside the insertion core component in a sleeving mode, the spring bolt is located on the peripheral side of the insertion core component, and the spring bolt axially extends outwards relative to the insertion core component and penetrates through the containing groove; wherein the spring bolt is used for being in locking connection with a clamping part of an adaptive insertion end structure, and when the first shell is driven to move relative to the locking sleeve, the reverse buckling part drives the spring bolt to turn inwards and outwards in the containing groove so as to be separated from the clamping part.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connectors, and particularly to a self-locking plug end structure and an electrical connector. Background Art

[0002] As a key component for realizing circuit connection, an electrical connector usually consists of a plug and a socket. Electrical connectors in traditional technologies usually also have a self-locking function, which is usually achieved by respectively arranging matching locking structures, such as snap-fit structures, on the plug housing and the socket housing. After the two are inserted, the locking structures cooperate with each other to achieve self-locking. However, due to the high requirements for the sealing performance, mating stability between the plug housing and the socket housing, and the overall size of the electrical connector, the size of the locking structure is often limited and usually small, resulting in unstable locking and affecting the connection reliability of the electrical connector. Summary of the Invention

[0003] Based on this, in view of the problem of insufficient locking stability of connectors with a self-locking function, it is necessary to provide a self-locking plug end structure and an electrical connector.

[0004] On the one hand, the present application provides a self-locking plug end structure, which includes a core component, a first housing, and a locking sleeve. The first housing has a first accommodation cavity and a receiving groove, and the receiving groove is distributed in one or more areas on the outer peripheral side of the first accommodation cavity. The core component passes through the first accommodation cavity. The first housing has an undercut portion, and the undercut portion is a partial structure that encloses to form the receiving groove. The locking sleeve is located inside the first housing. The locking sleeve includes a sleeve and a locking tongue. The locking tongue is an elastic body. The locking tongue is connected to the sleeve and extends away from the sleeve. The sleeve is sleeved outside the core component. The locking tongue is located on the outer peripheral side of the core component. The locking tongue axially extends relative to the core component and passes through the receiving groove. Wherein, the locking tongue is used for locking and connecting with a mating portion of a mating plug end structure. When the first housing is driven to move relative to the locking sleeve, the undercut portion drives the locking tongue to turn inside and outside the receiving groove to separate from the mating portion.

[0005] In one embodiment, the locking tongue includes a connection end and a clamping end arranged oppositely. The connection end is connected to the sleeve, and the clamping end has a clamping portion. The clamping portion is used for clamping with the mating portion, and the clamping portion is configured as a clamping hole or a clamping block.

[0006] In one embodiment, the locking tongue includes a guiding surface distributed on the inner side surface of the clamping end. In the direction away from the sleeve along the axis of the self-locking plug end structure, the guiding surface gradually bends or inclines towards the outside of the locking tongue, and the undercut portion abuts against the guiding surface.

[0007] In one embodiment, the introduction surface extends from the inner side surface of the lock tongue to the end surface of the clamping end, and the junction side of the introduction surface and the end surface of the clamping end is the introduction side, and the middle area of ​​the introduction side in the circumferential direction around the axis of the self-locking plug end structure is farther away from the inner side surface of the lock tongue than the two side areas; the undercut portion is located at the end of the first shell away from the kit, and the undercut portion has a through avoidance groove, which is connected to the receiving groove, and the undercut portion also includes a first fastener and a second fastener located on both sides of the avoidance groove; wherein the clamping portion is constructed as a clamping hole, and along the axis of the self-locking plug end structure, the avoidance groove, the middle area of ​​the introduction side and the clamping portion are aligned in sequence, and the first fastener and the second fastener are respectively aligned with the two side areas of the introduction side.

[0008] In one embodiment, the lock tongue includes an interconnected tongue tip section and a tongue root section, the clamping portion is arranged on the tongue tip section, the tongue tip section has an avoidance surface, the avoidance surface is distributed on at least a portion of the outer side of the tongue tip section, and in the direction away from the kit along the axis of the self-locking plug end structure, the avoidance surface gradually bends or tilts toward the inner side of the lock tongue; the tongue root section is connected to the kit, and a cutting groove is provided on the inner side and / or outer side of the tongue root section.

[0009] In one embodiment, the core component includes an insulator, the insulator includes a snap-on block, the snap-on portion is constructed as a snap-on hole, and the insulator can also be used as an insulator of the adapter plug structure. When the insulator is used as an insulator of the adapter plug structure, the snap-on block is snap-on with the snap-on portion of the self-locking plug structure; the reduction groove is distributed on the inner side of the tongue root segment, and the snap-on block is arranged in the reduction groove.

[0010] In one embodiment, the core component includes an insulator and a conductive terminal, the conductive terminal is inserted into the insulator, and a plurality of the conductive terminals are arranged in an array on the insulator; the insulator has a stop surface, the number of the stop surfaces corresponds to the number of the locking tongues, and the inner side surfaces of the locking tongues correspond to the stop surfaces to limit the rotation of the core component.

[0011] In one embodiment, the insulator includes a main body and a boss, the boss is protruding from the outer periphery of the main body, the connecting end extends into the sleeve and protrudes relative to the inner circumference of the sleeve, and the connecting end is abutted against the boss for positioning.

[0012] In one embodiment, the self-locking plug end structure also includes a second shell and a wire clamp, a partial structure of the wire clamp is passed through the kit, the wire clamp is located on the side of the boss away from the lock tongue and abuts against the boss, the second shell is sleeved over the kit and the wire clamp, the second shell abuts against one end of the wire clamp away from the boss and is connected to the kit.

[0013] In one embodiment, there are multiple locking tongues, and the multiple locking tongues are spaced apart in the circumferential direction around the axis of the self-locking plug end structure, and the number and distribution positions of the receiving grooves and the number and distribution positions of the undercut portions correspond to the locking tongues.

[0014] On the other hand, the present application further provides an electrical connector, which includes the self-locking plug structure as described above.

[0015] In the above-mentioned self-locking plug-in structure, the core component is inserted into the first accommodating cavity, and the receiving groove is located at one or more areas on the outer peripheral side of the first accommodating cavity, so that there is a gap between one or more areas on the outer periphery of the core component and the inner peripheral surface of the first shell, thereby providing a layout space for the lock tongue. In the present application, by configuring the receiving groove, the lock tongue can be distributed between the core component and the first shell. Thus, by adaptively reducing the size of the core component, the size of the lock tongue can be increased to increase the stability of the locking connection between the lock tongue and the card-matching part. Moreover, in the present application, the lock tongue is inserted into the receiving groove, and the undercut part is a partial structure forming the receiving groove, so the undercut part can be easily matched with the lock tongue. Thus, when the first shell is driven to move, the lock tongue can be easily buckled to turn outward and separate from the card-matching part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic cross-sectional view of an electrical connector provided in accordance with an embodiment of the present application.

[0017] Figure 2 This is an axonometric diagram of a self-locking plug end structure provided in one embodiment of the present application.

[0018] Figure 3 for Figure 2 A front view of the self-locking plug end structure shown.

[0019] Figure 4 for Figure 3 The self-locking plug-in structure is shown in a cross-sectional view along line AA.

[0020] Figure 5 for Figure 4 A cross-sectional view of the locking sleeve in the self-locking plug-in end structure shown.

[0021] Figure 6 for Figure 2An axonometric diagram of the locking sleeve in the self-locking plug-in end structure shown.

[0022] Figure 7 for Figure 6 Front view of the locking sleeve shown.

[0023] Figure 8 for Figure 2 An axonometric schematic diagram of the first housing in the self-locking plug end structure is shown.

[0024] Figure 9 for Figure 3 The self-locking plug-in structure is shown in a cross-sectional view along line BB.

[0025] Figure 10 for Figure 2 An exploded schematic diagram of the self-locking plug end structure shown.

[0026] Reference numerals: 10, electrical connector; 20, self-locking plug structure; 30, adapter plug structure; 31, snap-fitting portion; 100, plug core component; 110, insulator; 111, snap-fitting block; 112, main body; 113, boss; 114, anti-rotation surface; 115, snap-fitting groove; 116, guide block; 120, conductive terminal; 200, first housing; 201, first accommodating cavity; 202, receiving groove; 203, second accommodating cavity; 204, first limiting portion; 210, undercut portion; 211, avoidance groove; 212 , first fastener; 213, second fastener; 220, rib; 300, locking sleeve; 310, kit; 311, second limiting portion; 320, locking tongue; 321, connecting end; 322, clamping end; 323, clamping portion; 324, introduction surface; 325, introduction side; 326, tongue tip section; 326a, avoidance surface; 327, tongue root section; 327a, reduction groove; 328, tongue body section; 329, abutment surface; 400, second shell; 500, wire clamp; 510, clamp arm; O, axis; C, circumferential direction. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0028] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0029] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In the present application, unless otherwise clearly defined and limited, if there are terms such as "mounted", "connected", "coupled", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] In the present application, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0032] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate 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 intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0033] In the traditional technology, an electrical connector usually consists of a plug and a socket. For an electrical connector with a plug-in self-locking function, it usually relies on the locking structures configured on the plug housing and the socket housing to cooperate with each other to achieve self-locking. For example, a first buckle may be provided on the plug housing, and a second buckle may be provided on the socket housing. When the plug and the socket are plugged in, the first buckle and the second buckle are snap-fitted to achieve self-locking. However, limited by requirements such as the sealing performance between the plug housing and the socket housing, the mating stability during insertion, and the overall size of the electrical connector, the sizes of the first buckle and the second buckle are often designed to be small. As a result, there is a problem of unstable self-locking function of the self-locking electrical connector, especially when the electrical connector is used in an environment of high-speed movement.

[0034] To solve the above problems, the present application proposes a self-locking plug end structure. The self-locking plug end structure includes a core component, a first housing, and a locking sleeve. The locking sleeve is sleeved outside the core component and is located inside the first housing. The locking sleeve includes a locking tongue, and the locking tongue is used for locking and connecting with another plug end structure (i.e., the mating plug end structure mentioned below). Moreover, the locking tongue penetrates between the core component and the first housing. Thus, by adaptively reducing the size of the core component, the locking tongue located between the core component and the first housing can have a larger structural size (mainly thickness) to improve the stability of the locking connection. It should be noted that the core component generally includes an insulator and a plurality of conductive terminals. The conductive terminals penetrate through the insulator, and the insulator provides installation support and insulation protection for the conductive terminals. In current electrical connectors, the distribution positions of the conductive terminals on the insulator are usually relatively loose. Therefore, the distribution arrangement of the plurality of conductive terminals can be re-planned. By arranging the distribution positions of the conductive terminals, while meeting various basic requirements such as the creepage distance requirements between the conductive terminals and the installation stability requirements, a certain space can be provided for the installation and arrangement of the locking tongue. It should be emphasized that for the conductive terminals of the electrical connectors in the traditional technology, most of them do not have special distribution requirements, such as a loose circumferential distribution. Therefore, a certain space can be created by simply adjusting the arrangement of the conductive terminals. The embodiments of the present application do not limit that the conductive terminals must be arranged in a specific array to meet the requirement of arranging the locking tongue. Those skilled in the art can flexibly adjust the distribution plan of the conductive terminals according to actual requirements. The following will describe in detail the self-locking plug end structure provided by the embodiments of the present application and the electrical connector including the self-locking plug end structure with reference to the accompanying drawings of the specification and the specific embodiments.

[0035] Refer to Figure 1 , Figure 1 shows a cross-sectional schematic view of an electrical connector provided by an embodiment of the present application. The electrical connector 10 provided by an embodiment of the present application includes a self-locking plug end structure 20. The electrical connector 10 further includes a mating plug end structure 30. After the self-locking plug end structure 20 and the mating plug end structure 30 are plugged together, they can form self-locking to improve the structural stability and the stability of electrical conduction. Among them, one of the self-locking plug end structure 20 and the mating plug end structure 30 can be configured as a plug, and the other is configured as a socket. The present application does not specifically limit which one is used as the plug and which one is used as the socket, and it can be set according to requirements. Further, the mating plug end structure 30 includes a mating portion 31, and the self-locking plug end structure 20 can form self-locking with the mating plug end structure 30 by locking and connecting with the mating portion 31. Furthermore, the self-locking plug end structure 20 can be axially plugged with the mating plug end structure 30, that is, the self-locking plug end structure 20 can be plugged with the mating plug end structure 30 along the direction of its own axis O.

[0036] Refer to Figures 1 to 4 , wherein Figure 2The axonometric schematic diagram of the self-locking plug end structure provided by an embodiment of the present application is shown. Figure 3 is Figure 2 the front view of the self-locking plug end structure shown. Figure 4 is Figure 3 the sectional view of the self-locking plug end structure shown along the line A-A. The self-locking plug end structure 20 provided by an embodiment of the present application includes a plug core component 100, a first housing 200 and a locking sleeve 300. The plug core component 100 and the locking sleeve 300 are both located inside the first housing 200. The plug core component 100 is used for transmitting electric energy or electrical signals. The first housing 200 has a first accommodating cavity 201 and a receiving groove 202. The receiving groove 202 is distributed in one or more areas on the outer peripheral side of the first accommodating cavity 201. The plug core component 100 is disposed through the first accommodating cavity 201. The first housing 200 has an inverted buckle portion 210. The inverted buckle portion 210 is a partial structure that encloses to form the receiving groove 202. The locking sleeve 300 includes a sleeve member 310 and a locking tongue 320. The locking tongue 320 is an elastic body. The locking tongue 320 is connected to the sleeve member 310 and extends away from the sleeve member 310. The sleeve member 310 is sleeved outside the plug core component 100. The locking tongue 320 is located on the outer peripheral side of the plug core component 100. The locking tongue 320 axially extends outward relative to the plug core component 100 and passes through the receiving groove 202. Wherein, the locking tongue 320 is used for locking and connecting with the mating portion 31 of the mating plug end structure 30. When the first housing 200 is driven to move relative to the locking sleeve 300, the inverted buckle portion 210 drives the locking tongue 320 to turn inside and outside the receiving groove 202 to separate from the mating portion 31.

[0037] In the above-mentioned self-locking plug end structure 20, the plug core component 100 is disposed through the first accommodating cavity 201, and the receiving groove 202 is located in one or more areas on the outer peripheral side of the first accommodating cavity 201. Therefore, there is a gap between one or more areas on the outer periphery of the plug core component 100 and the inner peripheral surface of the first housing 200, thus providing a layout space for the locking tongue 320. In the present application, by configuring the receiving groove 202, the locking tongue 320 can be distributed between the plug core component 100 and the first housing 200. Thus, by adaptively reducing the size of the plug core component 100, the size of the locking tongue 320 can be increased to enhance the stability of the locking connection between the locking tongue 320 and the mating portion 31. Moreover, in the present application, the locking tongue 320 passes through the receiving groove 202, and the inverted buckle portion 210 is a partial structure of the formed receiving groove 202. Therefore, the inverted buckle portion 210 can conveniently cooperate with the locking tongue 320. Thus, when the first housing 200 is driven to move, it can conveniently trigger the locking tongue 320 to turn outward and separate from the mating portion 31. It can be understood that since the receiving groove 202 is only distributed in one or several areas on the outer periphery of the plug core component 100, there is still sufficient layout space for the plug core component 100.

[0038] Please refer to Figure 3In one embodiment, the plug component 100 includes an insulator 110 and a conductive terminal 120, and the conductive terminal 120 is inserted into the insulator 110. The insulator 110 can provide installation support and insulation protection for the conductive terminal 120. A plurality of conductive terminals 120 are arranged in an array on the insulator 110. By arranging the arrangement of the plurality of conductive terminals 120, the space required for the plurality of conductive terminals 120 is reduced without changing the size and number of the conductive terminals 120, so that the volume of the insulator 110 can be constructed smaller, which is convenient for forming a receiving groove 202 between the insulator 110 and the inner wall surface of the first shell 200. The array arrangement of the plurality of conductive terminals 120 can be configured as, but not limited to, a rectangular array arrangement. Of course, it should be emphasized that the conductive terminals 120 are not limited to being arranged in an array, and the arrangement of the conductive terminals 120 can also be adaptively adjusted according to other needs, so that the plurality of conductive terminals 120 occupy a smaller space.

[0039] See also Figure 4 In one embodiment, there are multiple locking tongues 320, and the multiple locking tongues 320 are spaced apart in the circumferential direction C around the axis O of the self-locking plug-in end structure 20, and the multiple locking tongues 320 are respectively locked and connected with the multiple card-matching parts 31. By configuring multiple locking tongues 320 to achieve locking connection together, the stability of self-locking can be further improved. The number and distribution positions of the receiving grooves 202 and the number and distribution positions of the undercut parts 210 correspond to the locking tongues 320. For ease of understanding and explanation, the drawings and embodiments of the specification are all based on the example of two locking tongues 320. When it has other numbers, it is the same, so it will not be repeated.

[0040] See also Figure 5 , combined with Figure 4 In one embodiment, the locking tongue 320 includes a connecting end 321 and a clamping end 322 that are arranged opposite to each other. The connecting end 321 is connected to the kit 310, and the clamping end 322 has a clamping portion 323. The clamping portion 323 is used to clamp with the clamping portion 31 of the adapter plug structure 30, and the clamping portion 323 is configured as a clamping hole or a clamping block. For example, when the clamping portion 323 is configured as a clamping hole, the clamping portion 31 is configured as a clamping block, and the locking connection is achieved by plugging and matching the clamping portion 31 with the clamping portion 323. Of course, when the clamping portion 323 is configured as a clamping block, the clamping portion 31 can be configured as a clamping hole.

[0041] See also Figure 5In one implementation, the clamping end 322 has an abutting surface 329, which is used to contact the clamping portion 31 of the adapter plug structure 30. The abutting surface 329 can be perpendicular to the axis O of the self-locking plug structure 20, that is, the abutting surface 329 can be perpendicular to the direction of the self-locking plug structure 20 and the adapter plug structure 30 for plugging and separating, so as to fully provide the abutting and limiting effect. It can be understood that the abutting surface 329 is perpendicular to the axis O of the self-locking plug structure 20 (that is, perpendicular to the above-mentioned plugging and separation direction), that is, the abutting surface 329 itself is neither inclined relative to the above-mentioned axis O, nor includes an area inclined relative to the above-mentioned axis O. Since the locking tongue 320 is turned outward by the buckle portion 210, the clamping portion 323 is separated from the clamping portion 31, and the turning outward of the locking tongue 320 does not rely on the structural shape of the clamping portion 323 itself. Therefore, when the abutting surface 329 is configured perpendicular to the above-mentioned axis O, the clamping portion 323 can still be conveniently and smoothly separated from the clamping portion 31 on the adapter plug structure 30. When the clamping portion 323 is configured as a clamping hole, the abutting surface 329 can include but is not limited to the inner wall of the clamping portion 323 on one side away from the sleeve 310.

[0042] See also Figure 6 , combined with Figure 4 and Figure 5 In one embodiment, the lock tongue 320 includes an introduction surface 324, and the introduction surface 324 is distributed on the inner side surface of the clamping end 322. The introduction surface 324 can be distributed in a partial area of ​​the inner side surface of the clamping end 322 to reduce processing requirements and reduce processing difficulty. In the direction away from the kit 310 along the axis O of the self-locking plug end structure 20, the introduction surface 324 gradually bends or tilts toward the outside of the lock tongue 320, and the undercut portion 210 abuts against the introduction surface 324. Since the introduction surface 324 is bent or tilted, when the first shell 200 is driven to move along the axis O of the self-locking plug end structure 20, the introduction surface 324 can gradually buckle and push the lock tongue 320 to turn outward, so that the clamping portion 323 is separated from the clamping portion 31, and the self-locking plug end structure 20 and the matching plug end structure 30 are separated from the self-locking relationship. It is easy to understand that, since the introduction surface 324 is curved or inclined, when the driving force applied to the first shell 200 is removed, the elastic restoring force of the introduction surface 324 can also reversely drive the first shell 200 to roughly return to the position before being driven. It should be noted that this embodiment does not limit the undercut portion 210 to maintain a contact and abutment relationship with the introduction surface 324, and there may be a certain axial spacing between the two. The undercut portion 210 can be configured to move to a position where it contacts and abuts the introduction surface 324.

[0043] Furthermore, the first housing 200 is driven to move the undercut portion 210 toward the direction approaching the sleeve 310 , thereby driving the locking tongue 320 to turn outward.

[0044] Please refer again Figure 4In one embodiment, the first housing 200 includes a first limiting portion 204, and the locking sleeve 300 includes a second limiting portion 311. The first limiting portion 204 and the second limiting portion 311 are limitedly matched to limit the stroke of the axial movement of the first housing 200 relative to the locking sleeve 300. Further, the first limiting portion 204 can be configured as a limiting groove, and the first limiting portion 204 is provided on the inner wall surface of the first housing 200. The second limiting portion 311 can be configured as a limiting block, and the limiting block is protruding from the outer wall surface of the sleeve 310. The movement stroke of the first housing 200 can be limited by the groove walls on both sides of the limiting groove in the direction of the axis O of the self-locking plug end structure 20 abutting against the limiting block.

[0045] See also Figures 6 to 9 In one embodiment, the lead-in surface 324 extends from the inner side surface of the lock tongue 320 to the end surface of the clamping end 322, and the boundary side of the lead-in surface 324 and the end surface of the clamping end 322 is the lead-in side edge 325. The middle area of ​​the lead-in side edge 325 in the circumferential direction C around the axis O of the self-locking plug end structure 20 is farther away from the inner side surface of the lock tongue 320 than the two side areas. It should be noted that the above-mentioned "farther away" refers to farther away in the clamping direction between the clamping portion 323 and the clamping portion 31, that is, in Figure 7 Each area of ​​the introduction surface 324 is bent or inclined starting from the inner side of the lock tongue 320, so the middle area of ​​the introduction side edge 325 is farther away from the inner side of the lock tongue 320 than the two side areas, which means that the middle area of ​​the introduction surface 324 (corresponding to the middle area of ​​the introduction side edge 325) has a larger flipping amplitude span, so it usually has a thinner thickness dimension; the two side areas of the introduction surface 324 (corresponding to the two side areas of the introduction side edge 325) usually have a thicker thickness dimension. See the middle area of ​​the introduction surface 324 and the introduction side edge 325 for details. Figure 7 The areas on both sides of the lead-in surface 324 and the lead-in side edge 325 are shown in FIG. Figure 7 It should be noted that, no matter the introduction side edge 325 or the introduction surface 324, the middle area and the two side areas are relative, and the embodiments of the present application do not limit their dividing lines. Figure 7 The markings in the middle are only for the convenience of understanding the distribution of each region.

[0046] like Figure 8 The undercut portion 210 is located at the end of the first shell 200 away from the sleeve 310, that is, the end corresponding to the position of the clamping end 322 and the guide surface 324. The undercut portion 210 has a through avoidance groove 211, which is connected to the receiving groove 202. The undercut portion 210 also includes a first fastener 212 and a second fastener 213 located on both sides of the avoidance groove 211. Similarly, the first fastener 212 and the second fastener 213 can also be located on both sides of the avoidance groove 211 in the circumferential direction C around the axis O of the self-locking plug end structure 20.Figure 9 , the clamping portion 323 can be constructed as a clamping hole. Along the axis O of the self-locking plug-in structure 20, the avoidance groove 211, the middle area of ​​the introduction side 325 and the clamping portion 323 are aligned in sequence. Therefore, when the adapter plug-in structure 30 is plugged into the self-locking plug-in structure 20, the clamping portion 31 can enter the receiving groove 202 from the avoidance groove 211 without obstacles, and enter the area where the introduction surface 324 is located from the middle area of ​​the introduction side 325. The introduction surface 324 is bent or inclined, so the clamping portion 31 can push the introduction surface 324 to turn the lock tongue 320 outward, and move to a position aligned with the clamping portion 323 to be inserted into the clamping portion 323 to form self-locking. Since the middle area of ​​the introduction side 325 is farther away from the inner side of the locking tongue 320, the risk of blocking and interfering with the locking tongue 320 when the locking portion 31 enters the area where the introduction surface 324 is located from the middle area of ​​the introduction side 325 is smaller. In other words, such a setting can improve the smoothness of insertion.

[0047] The first fastener 212 and the second fastener 213 are respectively aligned with the two side areas of the introduction side edge 325, that is, the undercut portion 210 mainly acts on the two side areas of the introduction surface 324 to drive the lock tongue 320 to turn outward. The two side areas of the introduction side edge 325 are relatively closer to the inner side surface of the lock tongue 320, so the first fastener 212 and the second fastener 213 acting on the two side areas of the introduction surface 324 can more directly and effectively drive the lock tongue 320 to turn outward to the position where the clamping portion 323 is separated from the clamping portion 31.

[0048] It is understood that, similar to the introduction side edge 325, the middle area of ​​the introduction surface 324 refers to the area located relatively in the middle in the circumferential direction C around the axis O of the self-locking plug end structure 20, and the two side areas of the introduction surface 324 refer to the two side areas located at the opposite edges in the circumferential direction C around the axis O of the self-locking plug end structure 20. As one example, the middle area of ​​the introduction surface 324 can be set to be inclined and bent more with respect to the two side areas, so that the middle area of ​​the introduction side edge 325 is farther away from the inner side surface of the lock tongue 320 relative to the two side areas. It is also possible to configure the middle area of ​​the introduction surface 324 to have a larger distribution area on the axis O of the self-locking plug end structure 20 relative to the two side areas, so that the introduction surface 324 is crescent-shaped. Therefore, under the condition of the same bending and tilting amplitude, the middle area of ​​the introduction side edge 325 can also be farther away from the inner and outer sides of the lock tongue 320 than the two side areas. The middle area of ​​the introduction surface 324 has a larger distribution area, which can make the introduction surface 324 closer to the location of the clamping portion 323, so as to directly and effectively guide the clamping portion 31 to be inserted into the clamping portion 323. Of course, the middle area and the two side areas of the introduction surface 324 can also be designed differently by the above two methods at the same time, so that the introduction surface 324 is curved in a crescent shape.

[0049] In one embodiment, the inner side surface of the locking tongue 320 may be configured as a plane.

[0050] Please refer to Figure 5 , and in conjunction with Figure 4 , in one embodiment, the locking tongue 320 includes a tip segment 326 and a root segment 327, and the tip segment 326 and the root segment 327 are connected to each other. The engaging portion 323 is provided on the tip segment 326, that is, the tip segment 326 is used to engage with the engaging portion 31, and the root segment 327 is connected to the kit 310. The engaging end 322 is one end of the tip segment 326 away from the root segment 327, and the connecting end 321 is one end of the root segment 327 away from the tip segment 326. The tip segment 326 has an avoidance surface 326a, and the avoidance surface 326a is distributed in at least a partial area on the outer side of the tip segment 326. In the direction away from the kit 310 along the axis O of the self-locking plug end structure 20, the avoidance surface 326a gradually bends or inclines toward the inside of the locking tongue 320, so that a certain interval is formed between the tip segment 326 and the inner wall surface of the first housing 200 for the locking tongue 320 to turn outward. Since the tip segment 326 is used to engage with the engaging portion 31, the tip segment 326 is the main area that needs to turn outward and deform in the locking tongue 320. Therefore, by configuring the avoidance surface 326a to form a certain interval space, it is convenient for the locking tongue 320 to turn outward and deform sufficiently. Of course, in each embodiment of the present application, it is not limited that only the tip segment 326 in the locking tongue 320 deforms, and a certain interval may be preset between the first housing 200 and the locking tongue 320 for the whole locking tongue 320 to turn outward and deform.

[0051] Please refer to Figure 5 , and in conjunction with Figure 4 , in one embodiment, the root segment 327 has a reduction groove 327a, and the reduction groove 327a may be opened on the inner side or the outer side of the root segment 327. Alternatively, the reduction groove 327a is opened on both the inner side and the outer side of the root segment 327. By providing the reduction groove 327a, the thickness dimension of the root segment 327 can be reduced to facilitate the turning and deformation of the locking tongue 320.

[0052] Please continue to refer to Figure 5, in one embodiment, the latch tongue 320 further includes a tongue body segment 328, and the tongue body segment 328 is connected between the tongue tip segment 326 and the tongue root segment 327. It should be noted that this embodiment does not limit the thickness of the entire latch tongue 320 or each part of the latching end 322 to be uniform. When the above structural requirements are met, the thickness dimension can be flexibly designed and adjusted. As an example, when the structural requirements of the avoidance surface 326a and the guiding surface 324, as well as the flipping deformation requirements of the latch tongue 320 are satisfied, the thickness of the tongue tip segment 326 can be configured to be relatively large so that the latching portion 323 can be in full contact with the mating portion 31 for limiting. The thickness of the tongue body segment 328 can be the largest so as to bear the stress during the flipping deformation of the latch tongue 320 together with the tongue tip segment 326 and the tongue root segment 327. The thickness dimension of the tongue root segment 327 can be relatively small to facilitate flipping deformation. Of course, the thickness dimensions of the above-mentioned segments of the latch tongue 320 are only examples to illustrate one design method of the latch tongue 320, and the latch tongue 320 can also be provided with other forms of thickness distribution according to actual requirements. It can be understood that the thickness dimensions described in the embodiments of the present application are the dimensions in the direction perpendicular to the axis O of the self-locking plug end structure 20. Without contradiction, each inner side surface is the side surface closer to the inside in the thickness direction, and each outer side surface is the side surface closer to the outside in the thickness direction.

[0053] Please refer to Figure 4 , in combination with Figure 1 and Figure 10 , in one embodiment, the insulator 110 can be configured to be universal for the self-locking plug end structure 20 and the mating plug end structure 30, that is, the self-locking plug end structure 20 can adopt the insulator 110 as described in the embodiments, and the mating plug end structure 30 can also adopt this insulator 110 to reduce costs such as mold design and production line configuration. At this time, the insulator 110 includes a mating block 111, and the latching portion 323 is configured as a latching hole. As described above, the insulator 110 can also be used as the insulator of the mating plug end structure 30. When the insulator 110 is used as the insulator of the mating plug end structure 30, the mating block 111 is latched with the latching portion 323 of the self-locking plug end structure 20, that is, when the insulator 110 is used for the mating plug end structure 30, the mating block 111 is the mating portion 31 of the mating plug end structure 30. In this embodiment, the cutting groove 327a can be distributed on the inner side of the tongue root segment 327, and the mating block 111 is arranged in the cutting groove 327a. That is to say, at this time, the cutting groove 327a is not only used to reduce the thickness dimension of the tongue root segment 327, but also can be used to accommodate the mating block 111 of the insulator 110, so that the insulator 110 is compatible and applicable in the self-locking plug end structure 20 and the mating plug end structure 30.

[0054] In one embodiment, the structures with recessed settings such as the avoidance surface 326a, the introduction surface 324, and the cutting groove 327a provided in the embodiments of the present application can all be configured to extend in a smooth surface or a rounded surface transition to reduce the possible stress concentration problem on the locking tongue 320.

[0055] Please refer to again Figure 4 , in one embodiment, the locking sleeve 300 can be used to fix the core component 100. As an example, the locking sleeve 300 can be configured to independently limit the position of the core component 100 to fix the core component 100. For example, at this time, the locking tongue 320 can clamp the core component 100. Alternatively, the locking sleeve 300 can be configured to cooperate with other components of the self-locking plug end structure 20 to fix the core component 100 together.

[0056] Please refer to in combination with Figure 9 and Figure 10 , in one embodiment, the self-locking plug end structure 20 further includes a second housing 400 and a wire clamp 500, and both the second housing 400 and the wire clamp 500 are also arranged in the first housing 200. Further, the first housing 200 is further provided with a second accommodation cavity 203, the second accommodation cavity 203 is located at the tail end of the first accommodation cavity 201, the second accommodation cavity 203 is communicated with the first accommodation cavity 201, and the wire clamp 500 and the second housing 400 are both distributed in the second accommodation cavity 203. The locking sleeve 300 can fix the core component 100 together with the second housing 400 and the wire clamp 500. Further, the kit 310 can be located in the second accommodation cavity 203, and the locking tongue 320 is connected to the kit 310 and extends into the first accommodation cavity 201.

[0057] Please refer to Figure 10 , in combination with Figure 4 and Figure 6, in one embodiment, the insulator 110 has anti-rotation surfaces 114, the number of the anti-rotation surfaces 114 corresponding to the number of the locking tongues 320. The inner side surfaces of the locking tongues 320 are correspondingly engaged with the anti-rotation surfaces 114 to limit the rotation of the core component 100. Further, if the number of the locking tongues 320 is multiple as described above, the number of the anti-rotation surfaces 114 can also be multiple. The multiple locking tongues 320 are correspondingly engaged with the multiple anti-rotation surfaces 114 one by one, which can form circumferential clamping and fixing of the insulator 110 and limit the rotation of the insulator 110 relative to the locking sleeve 300. It can be understood that for the engagement between the inner side surfaces of the locking tongues 320 and the anti-rotation surfaces 114, the two can adopt surface contact engagement, or there can be a certain assembly gap between the two. It is easy to understand that the anti-rotation surface 114 is a planar structure obtained by reducing the outer dimension of the insulator 110 for arranging the locking tongues 320. That is to say, in the present application, the locking tongues 320 are designed to be distributed between the first housing 200 and the core component 100, and the reduced structure of the core component 100 can still form a limiting engagement with the locking tongues 320 to fix the core component 100 through the locking tongues 320.

[0058] Please continue to refer to Figure 10 , in one embodiment, the insulator 110 includes a main body 112 and a boss 113. The boss 113 protrudes from the outer periphery of the main body 112, and the anti-rotation surface 114 is provided on the main body 112. The connecting end 321 extends into the kit 310 and protrudes relative to the inner peripheral surface of the kit 310, and the connecting end 321 abuts against and positions the boss 113. During installation, the core component 100 is inserted to the position where the boss 113 abuts against the connecting end 321, that is, the insertion is in place. At the same time, the connecting end 321 can clamp the boss 113 together with the wire clamp 500 to fix the core component 100. That is to say, the locking sleeve 300 can axially fix the core component 100 (through the boss 113) and circumferentially fix the core component 100 (through the anti-rotation surface 114) at the same time.

[0059] Please refer to Figure 4 , in combination with Figure 10 , in one embodiment, a part of the structure of the wire clamp 500 penetrates through the kit 310. The wire clamp 500 is located on the side of the boss 113 away from the locking tongues 320 and abuts against the boss 113. The second housing 400 is sleeved outside the kit 310 and the wire clamp 500. The second housing 400 abuts against one end of the wire clamp 500 away from the boss 113 and is connected to the kit 310. Thus, the locking sleeve 300 is connected and fixed to the wire clamp 500 through the second housing 400, so that the connecting end 321 of the locking tongue 320 and the wire clamp 500 can clamp the boss 113 from opposite sides to fix the core component 100.

[0060] Please continue to refer to 9. In one embodiment, the wire clamp 500 is located at the rear end of the plug core component 100, and the cable (not shown in the figure, the same below) connected to the conductive terminal 120 can extend to the outside of the electrical connector 10 through the wire clamp 500. The wire clamp 500 is used to clamp and fix the above-mentioned cable to reduce the probability of the cable and the conductive terminal 120 being loosened and falling off due to shaking or pulling of the cable. In other words, by configuring the wire clamp 500 to clamp the cable, the stability of the connection between the cable and the conductive terminal 120 can be improved.

[0061] See also Figure 9 and Figure 10 In one embodiment, the second housing 400 can be fixedly connected to the locking sleeve 300 by threaded connection. The wire clamp 500 includes a plurality of clamp arms 510, and the boss 113 has a plurality of clamping grooves 115. The plurality of clamp arms 510 are clamped and fixed with the plurality of clamping grooves 115, so that the wire clamp 500 is fixed relative to the ferrule component 100. The wire clamp 500 is fixedly connected to the ferrule component 100, so that during the process of the second housing 400 being screwed and connected with the locking sleeve 300, the wire clamp 500 does not rotate with the second housing 400, but is fixed relative to the ferrule component 100. In this way, the risk of the wire clamp 500 rotating during the connection between the second housing 400 and the locking sleeve 300, causing the cable inside to be twisted and wound and loosened and falling off, can be reduced.

[0062] See also Figure 8 In one embodiment, the first housing 200 includes a rib 220, and the rib 220 extends along the axis O of the self-locking plug-in end structure 20. The two ribs 220 cooperate with the undercut portion 210 to form a receiving groove 202. The receiving groove 202 is not only used for arranging the lock tongue 320, but also can provide a guiding function for the lock tongue 320 and the locking sleeve 300 as a whole when the locking sleeve 300 is installed. Furthermore, the insulator 110 also includes a guide block 116, and a guide groove (not shown in the figure, the same below) is opened on the inner wall surface of the sleeve 310. The guide block 116 is slidably matched with the guide groove to facilitate the rapid alignment and installation of the two.

[0063] See also Figure 4 , combined with Figure 8 In one embodiment, the side of the rib 220 facing the first accommodating cavity 201 can be in the same plane as the inner side of the correspondingly accommodated locking tongue 320. The shape of the first accommodating cavity 201 can be adapted to the shape of the partial structure of the ferrule component 100 located in the first accommodating cavity 201 to make full use of the space.

[0064] Furthermore, the side of the undercut portion 210 facing the first accommodating cavity 201 (i.e., the inner side thereof) can also be in the same plane as the inner side of the corresponding locking tongue 320. That is, the inner side of the undercut portion 210, the inner side of the rib 220, and the inner side of the locking tongue 320 corresponding to the two can be located in the same plane, so that the first accommodating cavity 201 has a regular shape, which is convenient for plugging and matching with the adapter plug structure 30. Furthermore, the undercut portion 210 can be provided at one end of the first shell 200 for plugging with the adapter plug structure 30, and extend in the opposite direction into the first shell 200 to form an undercut shape. The undercut portion 210 can have a wedge-shaped surface, which is used to contact and abut with the introduction surface 324, so that the undercut portion 210 can buckle the locking tongue 320 when the first shell 200 is driven.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A self-locking plug-in structure, characterized in that: The self-locking plug-in structure comprises: Insert parts; A first shell, wherein the first shell has a first accommodating cavity and a receiving groove, wherein the receiving groove is distributed in one or more areas on the outer circumference of the first accommodating cavity, wherein the insert component is inserted into the first accommodating cavity, and wherein the first shell has an undercut portion, wherein the undercut portion is a partial structure enclosing and forming the receiving groove; A locking sleeve, the locking sleeve is located in the first housing, the locking sleeve includes a sleeve and a lock tongue, the lock tongue is an elastic body, the lock tongue is connected to the sleeve and extends in a direction away from the sleeve, the sleeve is sleeved outside the ferrule component, the lock tongue is located on the outer peripheral side of the ferrule component, the lock tongue extends outward relative to the ferrule component axially and penetrates the receiving groove; The locking tongue is used for locking connection with the card-fitting part of the adapter plug structure, and when the first shell is driven to move relative to the locking sleeve, the undercut part drives the locking tongue to turn inside and outside the receiving groove to separate from the card-fitting part.

2. The self-locking plug-in structure according to claim 1, characterized in that: The locking tongue comprises a connecting end and a clamping end which are arranged opposite to each other. The connecting end is connected to the kit. The clamping end has a clamping portion which is used to clamp with the matching portion. The clamping portion is constructed as a clamping hole or a clamping block.

3. The self-locking plug-in structure according to claim 2, characterized in that: The locking tongue comprises an introduction surface distributed on the inner side surface of the clamping end, and the introduction surface is gradually bent or inclined toward the outer side of the locking tongue in the direction away from the kit along the axis of the self-locking plug end structure, and the undercut portion abuts against the introduction surface.

4. The self-locking plug-in structure according to claim 3, characterized in that: The introduction surface extends from the inner side surface of the lock tongue to the end surface of the clamping end, and the boundary side of the introduction surface and the end surface of the clamping end is the introduction side surface, and the middle area of ​​the introduction side surface in the circumferential direction around the axis of the self-locking plug end structure is farther away from the inner side surface of the lock tongue than the two side areas; The undercut portion is located at one end of the first shell body away from the sleeve, the undercut portion has a through avoidance groove, the avoidance groove is connected to the receiving groove, and the undercut portion also includes a first fastener and a second fastener located on both sides of the avoidance groove; Among them, the clamping part is constructed as a clamping hole, and along the axis of the self-locking plug-in structure, the avoidance groove, the middle area of ​​the introduction side and the clamping part are aligned in sequence, and the first fastener and the second fastener are respectively aligned with the two side areas of the introduction side.

5. The self-locking plug-in structure according to claim 2, characterized in that: The lock tongue comprises an interconnected tongue tip section and a tongue root section, the clamping portion is arranged on the tongue tip section, the tongue tip section has an avoidance surface, the avoidance surface is distributed on at least a part of the outer side of the tongue tip section, and in the direction away from the set along the axis of the self-locking plug end structure, the avoidance surface is gradually bent or inclined toward the inner side of the lock tongue; The tongue root segment is connected to the sleeve, and a cutting groove is provided on the inner side and / or the outer side of the tongue root segment.

6. The self-locking plug-in structure according to claim 5, characterized in that: The plug core component includes an insulator, the insulator includes a snap-fit ​​block, the snap-fit ​​portion is configured as a snap-fit ​​hole, the insulator can also be used as an insulator of the adapter plug structure, when the insulator is used as an insulator of the adapter plug structure, the snap-fit ​​block is snap-fitted with the snap-fit ​​portion of the self-locking plug structure; The reduction groove is distributed on the inner side of the tongue root section, and the card-matching block is arranged in the reduction groove.

7. The self-locking plug-in structure according to claim 2, characterized in that: The insert component includes an insulator and a conductive terminal, wherein the conductive terminal is inserted through the insulator, and a plurality of the conductive terminals are arranged in an array on the insulator; The insulator has anti-rotation surfaces, the number of which corresponds to the number of the locking tongues, and the inner side surfaces of the locking tongues correspond to and cooperate with the anti-rotation surfaces to limit the rotation of the core insert component.

8. The self-locking plug-in structure according to claim 7, characterized in that: The insulator comprises a main body and a boss, wherein the boss is protrudingly arranged on the outer periphery of the main body, the connecting end extends into the sleeve and protrudes relative to the inner peripheral surface of the sleeve, and the connecting end is abutted against the boss for positioning; The self-locking plug end structure also includes a second shell and a wire clamp, a part of the structure of the wire clamp is passed through the kit, the wire clamp is located on the side of the boss away from the lock tongue and abuts against the boss, the second shell is sleeved outside the kit and the wire clamp, the second shell abuts against one end of the wire clamp away from the boss and is connected to the kit.

9. The self-locking plug-in structure according to any one of claims 1 to 8, characterized in that: There are multiple locking tongues, which are spaced apart in the circumferential direction around the axis of the self-locking plug end structure. The number and distribution positions of the receiving grooves and the number and distribution positions of the undercut portions correspond to the locking tongues.

10. An electrical connector, characterized in that: The electrical connector includes the self-locking plug structure as described in any one of claims 1 to 9.

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