Trailer connector

Abstract

The utility model provides a trailer connector which comprises a seat body, a cover body and a locking piece. The locking piece is connected between the seat body and the cover body; the locking piece is rotatably connected to the cover body in the circumferential direction; the cover body is provided with a first axial fixing structure, and the locking piece is provided with a second axial fixing structure. The first axial fixing structure is connected to the second axial fixing structure so that the cover body and the locking piece can be fixedly connected in the axial direction of the cover body. The locking piece is rotatably connected to the seat body in the circumferential direction; the seat body is provided with a first axial clamping structure, and the locking piece is provided with a second axial clamping structure; when the locking piece is located at the first position, the first axial clamping structure is clamped to the second axial clamping structure, and the seat body and the locking piece are fixedly connected in the axial direction; when the locking piece is located at the second position and the first axial clamping structure and the second axial clamping structure are spaced in the circumferential direction, the seat body and the locking piece can be separated in the axial direction; the cover body can be rotationally connected to the opening side of the base body through a first rotating shaft, and the first rotating shaft extends in the tangential direction of the cover body.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of connector, especially, relate to a trailer connector. BACKGROUND

[0002] The trailer connector connects passenger cars and trailers, and its function is to provide current signals for various indicator lights of the trailer. The trailer connector comprises a cover, a seat body and a spring connected to the two, one end of the spring is pressed against the cover, and the cover and the seat body are only connected by the elastic force of the spring. However, in the process of the vehicle wading, when the flow force is greater than the elastic force of the spring, the flow impact force will overcome the elastic force of the spring, so that the cover is washed away by the flow and the seat body is flooded, thereby causing a series of problems, such as signal disorder, leakage, terminal corrosion, etc. Therefore, the trailer connector in the related art cannot meet the strict waterproof requirement. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a trailer connector, which aims to solve the technical problem that the trailer connector in the related art cannot meet the strict waterproof requirement.

[0004] To solve the above technical problem, the utility model is realized in the following way. A trailer connector comprises a seat body, a cover and a locking piece. The locking piece is connected between the seat body and the cover. The locking piece is rotatably connected to the cover along the circumference of the cover. The side of the cover facing the locking piece is provided with a first axial fixing structure, and the side of the locking piece facing the cover is provided with a second axial fixing structure. The first axial fixing structure is connected to the second axial fixing structure, so that the cover and the locking piece are fixedly connected along the axis of the cover. The locking piece is rotatably connected to the seat body along the circumference. The end of the seat body close to the locking piece is provided with a first axial clamping structure, and the side of the locking piece facing the seat body is provided with a second axial clamping structure. When the locking piece is in the first position, the first axial clamping structure is clamped to the second axial clamping structure, and the seat body and the locking piece are fixedly connected along the axis. When the locking piece is in the second position, when there is a distance between the first axial clamping structure and the second axial clamping structure along the circumference, the seat body and the locking piece can be separated along the axis. The cover is rotatably connected to the opening side of the seat body through a first rotating shaft, and the first rotating shaft extends along the tangent direction of the cover.

[0005] Further, the first axial fixing structure comprises a clamping part provided on the cover, and the second axial fixing structure comprises an annular clamping groove provided on the locking piece and extending along the circumference, and the clamping part is clamped to the annular clamping groove.

[0006] Further, the clamping portion comprises an arc-shaped protrusion protruding from the sidewall of the cover and extending along the circumference of the cover, the annular clamping groove comprises an annular recess formed in the sidewall of the locking member, and the arc-shaped protrusion is clamped in the annular clamping groove; or, the clamping portion comprises at least two protrusions protruding from the sidewall of the cover and arranged along the circumference, the annular clamping groove comprises an annular recess formed in the sidewall of the locking member, and each of the protrusions is clamped in the annular recess.

[0007] Further, the locking member comprises a cover portion covering the opening of the seat body along the axial direction, and a main body portion arranged on the side of the cover portion away from the opening of the seat body, and the annular clamping groove is formed in the main body portion; the main body portion is further provided with two oppositely arranged surface structures connected to the annular clamping groove, and the surface structures make the annular clamping groove form two arc-shaped clamping grooves; the clamping portion extends along the circumference to form an annular clamping buckle, and the annular clamping buckle is clamped in the two arc-shaped clamping grooves; or, the clamping portion comprises a plurality of clamping blocks arranged along the circumference at a first preset interval, and the clamping blocks are clamped in the two arc-shaped clamping grooves.

[0008] Further, the cover is provided with an indication groove recessed along the axial direction and extending along the circumference on the side of the cover facing the locking member, and the locking member is provided with an indication protrusion protruding on the side of the locking member facing the cover, and the indication protrusion is movably connected to the indication groove; or, the cover is provided with an indication protrusion protruding on the side of the cover facing the locking member, and the locking member is provided with an indication groove recessed along the axial direction and extending along the circumference on the side of the locking member facing the cover, and the indication protrusion is movably connected to the indication groove.

[0009] Further, the indication groove comprises two end grooves at two ends and a main groove connected between the two end grooves, and the depth of the recess of the end grooves along the axial direction is greater than the depth of the recess of the main groove along the axial direction.

[0010] Further, the first axial clamping structure comprises at least two grooves arranged on the outer circumferential side of the seat body and spaced apart along the circumference at a second preset interval, and the second axial clamping structure comprises at least two flanges protruding from the inner side wall of the cover body and spaced apart along the circumference at the second preset interval, the flanges and the grooves corresponding one by one; when the locking piece is in the first position, the flanges are clamped in the grooves; when the locking piece is in the second position, the flanges and the corresponding grooves are spaced apart along the circumference; or, the first axial clamping structure comprises at least two flanges protruding from the outer circumferential side of the seat body and spaced apart along the circumference at a second preset interval, and the second axial clamping structure comprises at least two grooves arranged on the inner side wall of the cover body and spaced apart along the circumference at the second preset interval, the flanges and the grooves corresponding one by one; when the locking piece is in the first position, the flanges are clamped in the grooves; when the locking piece is in the second position, the flanges and the corresponding grooves are spaced apart along the circumference.

[0011] Further, the trailer connector further comprises a resilient member connected between the cover body and the seat body, one end of the resilient member abutting against the cover body and the other end abutting against the seat body, the resilient member being used to provide a restoring force for covering the opening side of the seat body by the cover body.

[0012] Further, the trailer connector further comprises a sealing member clamped between the seat body and the locking piece.

[0013] Further, the locking piece is further provided with a holding portion on the outer surface away from the axial direction.

[0014] The trailer connector in the utility model has the beneficial effects that, compared with the related art,

[0015] In the utility model, the first axial fixing structure and the second axial fixing structure are connected, so that the cover body and the locking piece are fixedly connected in the axial direction of the cover body. In addition, when the locking piece is arranged in the first position and the first axial clamping structure of the seat body and the second axial clamping structure of the locking piece are clamped, the seat body and the locking piece are connected. Therefore, the cover body can be fixedly connected with the seat body in the axial direction through the locking piece, and the cover body and the locking piece and the seat body and the locking piece are fixedly connected through mechanical connection. In this way, the cover body and the locking piece cannot be separated in the water flow impact process, and the seat body and the locking piece cannot be separated either, so that the cover body can be kept in close connection with the seat body through the locking piece. The utility model can effectively prevent the cover body and the seat body from being separated under the water flow impact force, avoid water entering the seat body, improve the waterproof capability, and has high reliability.

[0016] When the cover needs to be opened to connect the external plug to the socket inside the socket body, the operator can rotate the locking member along the circumference of the cover while keeping the socket body and the cover stationary, so that the locking member is rotated from the first position to the second position, so that the first axial clamping structure and the second axial clamping structure are spaced in the circumferential direction, and then the socket body and the locking member can be relatively separated in the axial direction. Since the locking member and the cover are fixedly connected in the axial direction, the locking member can drive the cover to move in the axial direction relative to the socket body. Since the cover can be flipped relative to the socket body along the first rotation axis, and the first rotation axis extends in the tangential direction of the cover, the cover and the locking member can be flipped relative to the socket body along the first rotation axis. Therefore, the operator can directly open the cover and the locking member relative to the socket body, so that the external plug can be connected to the socket inside the socket body, and the whole process is simple to operate. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 is a perspective view of the trailer connector in the first embodiment of the present application;

[0019] Figure 2 is a cross-sectional view of the trailer connector in the first embodiment of the present application;

[0020] Figure 3 is an exploded view of the trailer connector in the second embodiment of the present application;

[0021] Figure 4 is a perspective view of the cover in the first embodiment of the present application;

[0022] Figure 5 is a perspective view of the locking member in the first embodiment of the present application from a first viewing angle;

[0023] Figure 6 is a perspective view of the locking member in the first embodiment of the present application from a second viewing angle;

[0024] Figure 7 is a partial structure view of the trailer connector in the first embodiment of the present application.

[0025] In the drawings, various reference signs denote: 1, seat body; 11, first axial clamping structure; 111, groove; 2, cover body; 21, first axial fixing structure; 211, clamping part; 22, indicating groove; 3, locking piece; 31, second axial fixing structure; 311, annular clamping groove; 32, indicating protrusion; 33, second axial clamping structure; 331, flange; 34, covering part; 35, main body part; 351, cutting surface structure; 4, elastic piece; 5, sealing piece; 6, pin; 7, decorative cover. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0028] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] Please refer to Figures 1-7The utility model embodiment provides a trailer connector, include: seat body 1, cover 2 and locking piece 3, locking piece 3 is connected between seat body 1 and cover 2, locking piece 3 is rotatablely connected in the circumference of cover 2 in cover 2, the side of cover 2 towards locking piece 3 is provided with first axial fixed structure 21, and the side of locking piece 3 towards cover 2 is provided with second axial fixed structure 31, first axial fixed structure 21 is connected in second axial fixed structure 31, to make cover 2 and locking piece 3 fixed connection along the axial direction of cover 2, locking piece 3 is rotatablely connected in the circumference in seat body 1, and the end of seat body 1 close to locking piece 3 is provided with first axial clamping structure 11, and the side of locking piece 3 towards seat body 1 is provided with second axial clamping structure 33, when locking piece 3 is in first position, first axial clamping structure 11 is clamped in second axial clamping structure 33, and seat body 1 and locking piece 3 are fixedly connected along the axial direction, when locking piece 3 is in second position, when first axial clamping structure 11 and second axial clamping structure 33 exist spacing in the circumference, seat body 1 and locking piece 3 can be separated along the axial direction, cover 2 can be rotatably connected in the opening side of seat body 1 through first pivot, and first pivot extends along the tangent direction of cover 2.

[0030] In the utility model embodiment, through first axial fixed structure 21 and second axial fixed structure 31 connection, can realize the fixed connection of cover 2 and locking piece 3 in the axial direction of cover 2. In addition, when locking piece 3 is set in first position, make seat body 1 first axial clamping structure 11 and locking piece 3 second axial clamping structure 33 clamping, seat body 1 and locking piece 3 are connected. Therefore, cover 2 can realize the fixed connection with seat body 1 in the axial direction through locking piece 3, and cover 2 and locking piece 3, seat body 1 and locking piece 3 are all realized fixedly through mechanical connection. So set, in the process of wading, the flow impact force cannot make cover 2 and locking piece 3 separate, also cannot make seat body 1 and locking piece 3 separate, so that cover 2 can keep close connection with seat body 1 through locking piece 3, the utility model embodiment can effectively prevent cover 2 and seat body 1 from being separated under the flow impact force, avoid seat body 1 from being waterlogged, improve waterproof capacity, and the reliability is high.

[0031] When it is needed to open the cover 2 to connect the external plug to the socket inside the socket body 1, the operator can rotate the locking piece 3 along the circumference of the cover 2 while keeping the socket body 1 and the cover 2 stationary, so that the locking piece 3 is rotated from the first position to the second position, so that the first axial clamping structure 11 and the second axial clamping structure 33 are spaced apart in the circumferential direction, and thus the socket body 1 and the locking piece 3 can be relatively separated in the axial direction. Since the locking piece 3 and the cover 2 are fixedly connected in the axial direction, the locking piece 3 can drive the cover 2 to move in the axial direction relative to the socket body 1. Since the cover 2 can be flipped relative to the socket body 1 along the first rotation axis, and the first rotation axis extends in the tangential direction of the cover 2, the cover 2 and the locking piece 3 can be flipped relative to the socket body 1 along the first rotation axis. Therefore, the operator can directly open the cover 2 and the locking piece 3 relative to the socket body 1, so that the external plug can be connected to the socket inside the socket body 1, and the whole process is simple to operate.

[0032] It can be understood that the cover 2 is tightly connected with the socket body 1 through the locking piece 3, which belongs to a mechanical locking mode, and has stronger waterproof capability compared with the technical solution of spring connection in the related art. Therefore, the trailer connector of the embodiment of the utility model can also be applied to other special and complex environments, and can avoid being scratched by obstacles such as gravel and branches to cause the device to be opened, and can also withstand the washing of a high-pressure water gun and the impact of high-pressure water flow generated by too fast vehicle speed during the vehicle wading process.

[0033] Further, referring to Figures 2-5 In some embodiments, the first axial fixing structure 21 includes a clamping portion 211 arranged on the cover 2, and the second axial fixing structure 31 includes an annular clamping groove 311 arranged on the locking piece 3 and extending in the circumferential direction, and the clamping portion 211 is clamped in the annular clamping groove 311.

[0034] In some implementations, the clamping portion 211 includes an arc-shaped protrusion protruding from the side wall of the cover 2 and extending in the circumferential direction of the cover 2, and the annular clamping groove 311 includes an annular groove 111 arranged on the side wall of the locking piece 3, and the arc-shaped protrusion is clamped in the annular groove 111.

[0035] Specifically, the arc-shaped protrusion can be semicircular or 3 / 4 circular, etc. Since the annular groove 111 is circular, during relative rotation of the cover 2 and the locking piece 3, the arc-shaped protrusion always abuts against the groove wall of the annular groove 111 in the axial direction, so that axial positioning of the cover 2 and the locking piece 3 during circumferential rotation can be achieved. The arc-shaped protrusion is arranged in a non-circular ring shape, so that the arc-shaped protrusion can be clamped in the annular groove 111, and the assembly difficulty of the cover 2 and the locking piece 3 can be reduced.

[0036] It should be noted that the arc-shaped protrusions can also extend circumferentially in a ring shape. In addition, the arc-shaped protrusions can be arranged at a middle position or a circumferential position of the cover body 2, and the annular recess 111 can be correspondingly arranged at a middle position or a circumferential position of the locking member 3.

[0037] In some implementations, the clamping portion 211 includes at least two protrusions protruding from the side wall of the cover body 2 and arranged circumferentially at intervals, and the annular clamping groove 311 includes the annular recess 111 arranged in the side wall of the locking member 3. Each protrusion is clamped in the annular recess 111.

[0038] Specifically, the number of protrusions can be 2, 3, 4, 5, 6, etc. Since the annular recess 111 is in a ring shape, in the process of relative rotation of the cover body 2 and the locking member 3, each protrusion always abuts against the groove wall of the annular recess 111 in the axial direction, so that axial positioning of the cover body 2 and the locking member 3 during circumferential rotation can be achieved. By arranging the clamping portion 211 as protrusions arranged at intervals, the clamping of each protrusion in the annular recess 111 can be facilitated, and the assembly difficulty of the cover body 2 and the locking member 3 can be reduced.

[0039] It should be noted that the shape of the protrusions is not limited in the utility model, and for example, the protrusions can also extend circumferentially for a small section, and the shapes of different protrusions can be different. Preferably, the shapes of the protrusions are the same, so that the manufacturing process can be simplified. In addition, the protrusions can be arranged at a middle position or a circumferential position of the cover body 2, and the annular recess 111 can be correspondingly arranged at a middle position or a circumferential position of the locking member 3.

[0040] In some embodiments, the first axial fixing structure 21 includes an annular clamping groove 311 arranged in the cover body 2 and extending circumferentially, and the second axial fixing structure 31 includes a clamping portion 211 arranged in the locking member 3 and clamped in the annular clamping groove 311.

[0041] In some implementations, the annular clamping groove 311 includes an annular recess 111 arranged in the side wall of the cover body 2, and the clamping portion 211 includes an arc-shaped protrusion protruding from the side wall of the locking member 3 and extending circumferentially. By clamping the arc-shaped protrusion in the annular recess 111, axial positioning of the cover body 2 and the locking member 3 during circumferential rotation can be achieved, which will not be described here.

[0042] In some implementations, the annular clamping groove 311 includes an annular recess 111 arranged in the side wall of the cover body 2, and the clamping portion 211 includes at least two protrusions protruding from the side wall of the locking member 3 and arranged circumferentially at intervals. By clamping each protrusion in the annular recess 111, axial positioning of the cover body 2 and the locking member 3 during circumferential rotation can be achieved, which will not be described here.

[0043] In some possible implementation manners, the annular clamping groove 311 comprises an annular through groove arranged on the cover body 2 and extending through in the axial direction, and the clamping portion 211 comprises an arc-shaped protrusion protruding from the locking member 3 towards one side of the cover body 2 and extending in the circumferential direction, the arc-shaped protrusion comprising a main body structure connected to the locking member 3 and extending in the axial direction, and an abutting portion protruding from the main body structure and extending in the radial direction, the main body structure being arranged in the through groove, and the abutting portion protruding from one end of the through groove away from the locking member 3 and abutting against one side of the cover body 2 away from the locking member 3.

[0044] Specifically, the arc-shaped protrusion can be semicircular or 3 / 4 circular, or the like. Since the annular recess 111 is circular, in the process of relative rotation of the cover body 2 and the locking member 3, the main body structure of the arc-shaped protrusion is always arranged in the through groove in the axial direction, and the abutting portion of the arc-shaped protrusion can always abut against one side of the cover body 2 away from the locking member 3, so that axial positioning of the cover body 2 and the locking member 3 in the process of circumferential rotation can be achieved. The arc-shaped protrusion is arranged in a non-circular shape, so that the arc-shaped protrusion can be conveniently clamped in the annular recess 111, and the assembly difficulty of the cover body 2 and the locking member 3 can be reduced. In addition, the axial dimension of the abutting portion gradually decreases from one end of the arc-shaped protrusion away from the cover body 2 to one end of the arc-shaped protrusion close to the cover body 2, so that the arc-shaped protrusion can be in the shape of an arrow, thereby further facilitating clamping of the arc-shaped protrusion in the annular recess 111.

[0045] It should be noted that the arc-shaped protrusion can also extend in the circumferential direction in a circular shape. In addition, the arc-shaped protrusion can be arranged at a middle position or a peripheral position of the cover body 2, and the annular recess 111 can be correspondingly arranged at a middle position or a peripheral position of the locking member 3.

[0046] In some possible implementation manners, the annular clamping groove 311 comprises an annular through groove arranged on the cover body 2 and extending through in the axial direction, and the clamping portion 211 comprises a plurality of protrusions protruding from the locking member 3 towards one side of the cover body 2 and arranged in the circumferential direction at intervals; each protrusion comprises a main body structure connected to the locking member 3 and extending in the axial direction, and an abutting portion protruding from the main body structure and extending in the radial direction, each main body structure being arranged in the through groove, and each abutting portion protruding from one end of the through groove away from the locking member 3 and abutting against one side of the cover body 2 away from the locking member 3.

[0047] Specifically, the number of the protrusions can be 2, 3, 4, 5, 6, etc. Since the annular groove 111 is in the shape of a ring, during the relative rotation of the cover 2 and the locking member 3, the arc-shaped protrusion body structure is always arranged in the straight-through groove in the axial direction, and the arc-shaped protrusion abutting portion can always abut against the side of the cover 2 away from the locking member 3, so that the axial positioning of the cover 2 and the locking member 3 during the circumferential rotation can be achieved. By arranging the clamping portion 211 as the protrusions arranged at intervals, the clamping of the protrusions in the annular groove 111 can be facilitated, and the assembly difficulty of the cover 2 and the locking member 3 can be reduced. Similarly, each protrusion can be in the shape of an arrow, so that the assembly difficulty can be further reduced. In addition, the shape and position of the protrusions are not limited, and will not be described here.

[0048] Further, referring to Figures 2-5 In some specific embodiments, the locking member 3 includes a cover portion 34 covering the opening of the seat body 1 in the axial direction, and a main body portion 35 provided on the side of the cover portion 34 away from the opening of the seat body 1, and the annular clamping groove 311 is formed in the main body portion 35; the main body portion 35 is further provided with two opposite surface structures 351 connected to the annular clamping groove 311, and the surface structures 351 divide the annular clamping groove 311 into two arc-shaped clamping grooves; the clamping portion 211 extends in the circumferential direction to form an annular clamping buckle, and the annular clamping buckle is clamped in the two arc-shaped clamping grooves; or, the clamping portion 211 includes a plurality of clamping blocks arranged at intervals in the circumferential direction at a first preset interval, and the clamping blocks are clamped in the two arc-shaped clamping grooves.

[0049] Specifically, the cover 2, the locking member 3 and the seat body 1 are sequentially arranged in the axial direction, so that the locking member 3 is provided with the cover portion 34 to cover and seal the seat body 1. The main body portion 35 is in the shape of a column and located in the middle of the cover portion 34, and two opposite surface structures 351 are arranged on the main body portion 35, and the ends of the two surface structures 351 are connected to the annular clamping groove 311, so that the annular clamping groove 311 is divided into two arc-shaped clamping grooves by the two surface structures 351. By arranging the clamping portion 211 as the annular clamping buckle or the plurality of clamping blocks arranged at intervals in the circumferential direction at the first preset interval, the arc-shaped clamping grooves can always be clamped with the annular clamping buckle or the plurality of clamping blocks during the relative rotation of the cover 2 and the locking member 3, so that the axial positioning of the cover 2 and the locking member 3 during the circumferential rotation can be achieved. By arranging the surface structures 351, the assembly of the clamping portion 211 and the annular clamping groove 311 can be facilitated.

[0050] It can be understood that the annular clamping buckle can be the arc-shaped protrusion in the shape of a ring as described above, and the plurality of clamping blocks can be the plurality of protrusions as described above. In addition, the first preset interval and the number of the clamping blocks can be set according to actual conditions, so that the plurality of clamping blocks are enclosed in a circle, and the arc-shaped clamping grooves can always be clamped with the clamping blocks.

[0051] Further, referring to Figures 2-5In some embodiments, the cover 2 is provided with an indicating groove 22 axially recessed and circumferentially extending on one side of the cover 2 facing the locking member 3, and the locking member 3 is provided with an indicating protrusion 32 protruding on one side of the locking member 3 facing the cover 2, and the indicating protrusion 32 is movably connected to the indicating groove 22.

[0052] Specifically, the cover 2 indirectly covers the opening side of the seat body 1 through the locking member 3, the cover 2 includes a cover plate parallel to the plane where the opening of the seat body 1 is located and circular, the covering part 34 of the locking member 3 and the opening of the seat body 1 are both circular, the cover plate of the cover 2, the covering part 34 of the locking member 3 and the opening of the seat body 1 are concentric circles, and the three are axially coincident. The indicating groove 22 is a segment of an arc, and the arc is concentric with the cover plate. The indicating protrusion 32 is provided at a corresponding position in the axial direction of the locking member 3. Therefore, when the cover 2 and the locking member 3 rotate relative to each other, the indicating protrusion 32 can move along the indicating groove 22, so that the circumferential rotation of the cover 2 and the locking member 3 can be limited from deviating in the radial direction.

[0053] In addition, when the locking member 3 is in the first position, the seat body 1 and the locking member 3 are fixedly connected in the axial direction, so that the device is in the locked state; when the locking member 3 is in the second position, the seat body 1 and the locking member 3 can be separated in the axial direction, so that the device is in the unlocked state. The locking member 3 moves in the direction from the first position to the second position, which is the process of unlocking the device; the locking member 3 rotates in the direction from the second position to the first position, which is the opposite direction of the unlocking direction, which is the process of locking the device. As can be seen, the locking member 3 does not need to continue to rotate in the same direction when it is in the first position or the second position. By providing the indicating protrusion 32 of the locking member 3 to move in the indicating groove 22 of the cover 2, the two ends of the indicating groove 22 can correspond to the first position and the second position respectively. When the indicating protrusion 32 moves to the two ends of the indicating groove 22, it indicates that the locking member 3 moves to the first position or the second position, and it indicates that the cover 2 and the locking member 3 have been rotated to the right position, thereby playing a reminding role.

[0054] It should be noted that the indicating groove 22 can be provided on the cover plate of the cover 2, or can be provided at other positions of the cover 2. In some specific embodiments, the cover 2 further includes a first shaft seat connected to the tangential direction of the cover plate, and the indicating groove 22 can be provided on the first shaft seat, and the indicating protrusion 32 is provided at a corresponding position of the locking member 3, so that the indicating protrusion 32 is aligned with the indicating groove 22 in the axial direction.

[0055] It can be understood that the axial direction, the circumferential direction and the tangential direction of the aforementioned cover 2 all refer to the axial direction, the circumferential direction and the tangential direction of the cover plate of the cover 2.

[0056] In some embodiments, the cover 2 is provided with an indicating protrusion 32 on the side facing the locking member 3, the locking member 3 is provided with an indicating groove 22 on the side facing the cover 2, the indicating protrusion 32 is movably connected to the indicating groove 22. The circumferential rotation of the cover 2 and the locking member 3 can be limited to not deviate radially, and the indicating protrusion 32 and the indicating groove 22 can also serve as a reminder. The positions of the indicating protrusion 32 and the indicating groove 22 are not limited herein.

[0057] Further, referring to Figures 2-5 , in some embodiments, an indicating arrow can be provided on the outer surface (surface exposed to the outside) of the cover 2 and / or the locking member 3. The surface is rotated in the clockwise direction to unlock or lock the device, and the surface is rotated in the counterclockwise direction to lock or unlock the device, which can serve as a reminder.

[0058] Further, referring to Figures 2-5 , the indicating groove 22 includes two end grooves at both ends and a main groove connected between the two end grooves, the depth of the axial recess of the end groove is greater than the depth of the axial recess of the main groove.

[0059] Specifically, the two ends of the indicating groove 22 are two end grooves, and the middle of the indicating groove 22 is a main groove. The main groove can limit the circumferential rotation of the cover 2 and the locking member 3 to not deviate radially, and the two end grooves can remind the operator that the locking member 3 has been rotated to the position. By setting the two end grooves to have a greater recess depth, the operator's hand feeling can be improved without affecting the movement of the indicating protrusion 32 in the indicating groove 22, which is more conducive to reminding the operator that the locking member 3 has been rotated to the position.

[0060] Further, referring to Figure 2 , Figure 6 and Figure 7 , in some embodiments, the first axial clamping structure 11 includes at least two grooves 111 arranged on the outer circumferential side of the seat body 1 and spaced apart along the circumference according to a second predetermined interval, the second axial clamping structure 33 includes at least two flanges 331 protruding from the inner side wall of the cover 2 and spaced apart along the circumference according to the second predetermined interval, and the flanges 331 and the grooves 111 correspond one-to-one. When the locking member 3 is in the first position, the flanges 331 are clamped in the grooves 111; when the locking member 3 is in the second position, the flanges 331 and the corresponding grooves 111 are spaced apart along the circumference.

[0061] Specifically, along the circumferential direction, an annular structure is arranged on the outer circumferential side of the seat body 1, and along the axial direction, at least two flanges 331 protruding from the sidewall of the outer circumferential side of the seat body 1 are further arranged above or below the annular structure, and each flange 331 and the annular structure can form a single groove 111. The cover plate of the cover body 2 includes a main body wall parallel to the plane where the opening of the seat body 1 is located, and a circumferential sidewall surrounding the main body wall, and the flange 331 protrudes from the inner surface of the circumferential sidewall. When the flange 331 is clamped in the groove 111, the locking piece 3 and the seat body 1 are in a fixed connection state in the axial direction, indicating that the device is in a locked state, and at this time the locking piece 3 is in the first position. When the locking piece 3 is rotated along the circumferential direction so that the flange 331 is no longer clamped in the groove 111, that is, the flange 331 and the corresponding groove 111 have a spacing along the circumferential direction, the locking piece 3 and the seat body 1 are no longer in a fixed connection state in the axial direction, at this time the seat body 1 and the locking piece 3 can be separated in the axial direction, indicating that the device is in an unlocked state, and at this time the locking piece 3 is in the second position. The device only needs to rotate the locking piece 3 to lock and unlock, and the operation is simple. In addition, the plurality of flanges 331 of the locking piece 3 are arranged at intervals, and by clamping the plurality of flanges 331 in the corresponding grooves 111, balanced pressure can be formed on the seat body 1 and the cover body 2 in multiple angles and directions by the locking piece 3.

[0062] It should be noted that the groove 111 can also have other forms of arrangement, such as being recessed inwardly on the outer circumferential side of the seat body 1. The number of grooves 111 and flanges 331 is not specifically limited, and can be 2, 3, 4, etc., as long as they correspond to each other. At the same time, the second predetermined spacing can be set according to the actual situation, so that when the locking piece 3 is rotated from the second position to the first position, the flange 331 can be aligned with the groove 111 in the axial direction, so that the flange 331 can be clamped in the groove 111; and the force of the locking piece 3 and the seat body 1 in each direction is balanced. In addition, it can be understood that when the flange 331 is no longer clamped in the groove 111, it indicates that the locking piece 3 is in the second position, that is, the second position can not only be a certain position, but also can be a plurality of positions along the circumferential direction, depending on the setting of the second predetermined spacing.

[0063] In some embodiments, the first axial clamping structure 11 comprises at least two flanges 331 protruding from the outer circumferential side of the seat body 1 and arranged at a second preset interval in the circumferential direction, and the second axial clamping structure 33 comprises at least two grooves 111 arranged at a second preset interval in the circumferential direction on the inner side wall of the cover body 2, and the flanges 331 and the grooves 111 correspond one by one. When the locking piece 3 is in the first position, the flanges 331 are clamped in the grooves 111; when the locking piece 3 is in the second position, the flanges 331 and the corresponding grooves 111 are spaced apart in the circumferential direction. The axial fixed connection between the locking piece 3 and the seat body 1 can also be achieved by clamping the flanges 331 in the grooves 111, so that the device is in the locked state. Also, by rotating the locking piece 3 so that the flanges 331 are no longer clamped in the grooves 111, the seat body 1 and the locking piece 3 can be separated in the axial direction, indicating that the device is in the unlocked state, and at this time the locking piece 3 is in the second position. In addition, the shape, number, etc. of the grooves 111 and the flanges 331, and the size of the second preset interval, etc. are not limited, and will not be described here.

[0064] Further, please refer to Figure 1 , Figure 2 and Figure 7 , the trailer connector further comprises an elastic member 4 connected between the cover body 2 and the seat body 1, one end of the elastic member 4 abuts against the cover body 2 and the other end abuts against the seat body 1, and the elastic member 4 is used to provide a restoring force for covering the opening side of the seat body 1 by the cover body 2.

[0065] Specifically, the elastic member 4 can be a torsion spring, which comprises two connecting portions at both ends and an intermediate portion in the middle. The cover body 2 comprises a cover plate and a first shaft seat in the tangential direction of the cover plate, and the seat body 1 comprises a body and a second shaft seat in the tangential direction of the body, the second shaft seat has a first avoiding space connected with the first shaft seat, and the first shaft seat has a second avoiding space connected with the elastic member 4. In addition, the trailer connector further comprises a pin 6, which passes through the first shaft seat of the cover body 2, the second shaft seat of the seat body 1 and the intermediate portion of the torsion spring along the first rotation shaft. One of the connecting portions of the torsion spring abuts against the cover body 2, and the other connecting portion abuts against the seat body 1. When it is necessary to open the cover body 2 and the locking piece 3 to connect the plug outside to the socket of the seat body 1, the operator applies an external force to open the cover body 2 and the locking piece 3, so that when the cover body 2 and the locking piece 3 are flipped relative to the seat body 1, the first shaft seat rotates relative to the second shaft seat along the pin 6, and the cover body 2 and the seat body 1 compress the torsion spring. When the operator releases the cover body 2 and the locking piece 3, the cover body 2 and the locking piece 3 are automatically flipped in the direction of covering the opening side of the seat body 1 under the action of the restoring force of the torsion spring. The whole process is convenient to operate.

[0066] Further, please refer to Figures 1-3 , and Figure 7 , the trailer connector further comprises a sealing member 5 clamped between the seat body 1 and the locking piece 3.

[0067] Since the cover 2 is indirectly connected to the base 1 by the locking member 3, the size of the locking member 3 is the largest in the axial direction, and the size of the cover 2 can be set smaller, thus the locking member 3 bears the function of covering the opening of the base 1. The locking member 3 comprises a covering part 34 covering the opening of the base 1, and the sealing member 5 is clamped between the covering part 34 of the locking member 3 and the opening side of the base 1, thus the base 1 and the locking member 3 can be sealed by the sealing member 5, preventing liquid from entering the inside of the base 1 through the locking member 3, and improving the overall waterproof capability. In addition, the covering part 34 of the locking member 3 and the plug cover plate outside match in size and shape, that is, the plug cover plate outside can also cover the opening of the base 1, thus after the cover 2 and the locking member 3 are opened, the plug cover plate can completely cover the opening of the base 1 during the connection and use of the plug and the socket, thus the cleanliness of the device during use can be ensured.

[0068] Further, the outer surface of the locking member 3 away from the axial direction is also provided with a holding part. Specifically, the holding part can be further outwardly protruded along the outer surface of the locking member 3 in the circumferential direction and / or the axial direction of the covering part 34, and can also be bent during the extension. In the axial direction, the holding part can be bent towards the direction close to the cover 2, or can also be bent towards the direction away from the cover 2. The holding part has a certain surface area and thickness, and by providing the holding part, it is beneficial for the operator to hold and better rotate the locking member 3, and to turn the locking member 3 and the cover 2. In addition, when the holding part is bent and extended in the axial direction away from the cover 2 and in the radial direction away from the base 1, the holding part can also play a role of guiding the flow, guiding the water flow away from the base 1, and further preventing the liquid from flowing to the base 1.

[0069] Further, please refer to Figures 1-3 , and Figure 7 The decorative cover 7 can also be provided on the side of the cover 2 away from the locking member 3 to beautify the appearance.

[0070] Further, please refer to Figures 1-3 , and Figure 7 In some specific embodiments, the sealing member 5 can be a sealing ring. During the assembly of the device, the locking member 3 is assembled to the cover 2 by hard extrusion (the first axial fixing structure 21 and the second axial fixing structure 31 are connected), then the sealing ring is matched with the locking member 3, and then the locking member 3, the cover 2 and the sealing ring are integrally installed on the base 1 by the pin 6 and the spring.

[0071] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0072] The above is the description of the technical scheme provided by the utility model, for the technical personnel in the art, according to the utility model embodiment's thinking, there will be the change in specific implementation and application range, and the above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A trailer connector, characterized in that The utility model provides a seat body, a cover and a locking piece, the locking piece is connected between the seat body and the cover, the locking piece is rotatably connected to the cover along the circumference of the cover, the cover is provided with a first axial fixing structure on the side towards the locking piece, the locking piece is provided with a second axial fixing structure on the side towards the cover, the first axial fixing structure is connected to the second axial fixing structure, so that the cover and the locking piece are fixedly connected along the axis of the cover, the locking piece is rotatably connected to the seat body along the circumference, the seat body is provided with a first axial clamping structure on the end close to the locking piece, the locking piece is provided with a second axial clamping structure on the side towards the seat body, when the locking piece is in the first position, the first axial clamping structure is clamped to the second axial clamping structure, the seat body and the locking piece are fixedly connected along the axis, when the locking piece is in the second position, the first axial clamping structure and the second axial clamping structure are spaced along the circumference, so that the seat body and the locking piece can be separated along the axis, the cover is rotatably connected to the opening side of the seat body through a first rotating shaft, and the first rotating shaft extends along the tangent direction of the cover. The first axial fixing structure comprises a clamping part arranged on the cover, and the second axial fixing structure comprises an annular clamping groove arranged on the locking piece and extending along the circumference. The clamping part comprises an arc-shaped protrusion protruding from the side wall of the cover and extending along the circumference of the cover, and the annular clamping groove comprises an annular groove arranged on the side wall of the locking piece. The locking piece comprises a cover part covering the opening of the seat body along the axis, and a main body part arranged on the side of the cover part away from the opening of the seat body, and the annular clamping groove is arranged on the main body part. The main body part is further provided with two surface structures connected to the annular clamping groove and arranged oppositely, and the surface structures make the annular clamping groove form two arc-shaped clamping grooves. The clamping part extends along the circumference to form an annular clamping buckle clamped in the two arc-shaped clamping grooves, or the clamping part comprises a plurality of clamping blocks arranged at a first preset interval along the circumference, and the clamping blocks are clamped in the two arc-shaped clamping grooves. The cover is provided with an indicating groove recessed along the axis and extending along the circumference on the side towards the locking piece, and the locking piece is provided with an indicating protrusion on the side towards the cover, and the indicating protrusion is movably connected to the indicating groove. Or, the cover is provided with an indicating protrusion on the side towards the locking piece, and the locking piece is provided with an indicating groove recessed along the axis and extending along the circumference on the side towards the cover, and the indicating protrusion is movably connected to the indicating groove. ​ 2. The trailer connector of claim 1, wherein, ​ 3. The trailer connector of claim 2, wherein, ​ ​ 4. The trailer connector of claim 2, wherein, ​ ​ ​ 5. The trailer connector of claim 1, wherein, ​ ​ 6. The trailer connector of claim 5, wherein, The indicating groove comprises two end grooves at two ends and a main groove connected between the two end grooves, the end grooves are recessed along the axial direction to a depth greater than that of the main groove.

7. The trailer connector of claim 1, wherein, The first axial clamping structure comprises at least two grooves arranged on the outer circumferential side of the seat body along the circumferential direction at a second preset interval, the second axial clamping structure comprises at least two flanges protruding from the inner side wall of the cover body along the circumferential direction at the second preset interval, the flanges and the grooves correspond one by one; when the locking member is in the first position, the flanges are clamped in the grooves; when the locking member is in the second position, the flanges and the corresponding grooves are spaced along the circumferential direction; Or, the first axial clamping structure comprises at least two flanges protruding from the outer circumferential side of the seat body along the circumferential direction at a second preset interval, the second axial clamping structure comprises at least two grooves arranged on the inner side wall of the cover body along the circumferential direction at the second preset interval, the flanges and the grooves correspond one by one; when the locking member is in the first position, the flanges are clamped in the grooves; when the locking member is in the second position, the flanges and the corresponding grooves are spaced along the circumferential direction.

8. The trailer connector of claim 1, wherein, The trailer connector further comprises a resilient member connected between the cover body and the seat body, one end of the resilient member abuts against the cover body and the other end abuts against the seat body, the resilient member is used to provide a restoring force for covering the opening side of the seat body by the cover body.

9. The trailer connector of claim 1, wherein, The trailer connector further comprises a sealing member clamped between the seat body and the locking member.

10. The trailer connector of claim 1, wherein, The outer surface of the locking member away from the axial direction is further provided with a holding portion. The indicating groove comprises two end grooves at two ends and a main groove connected between the two end grooves, the end grooves are recessed along the axial direction to a depth greater than that of the main groove.

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