CN219477142U - Single-core plastic connector - Google Patents

Abstract

The utility model relates to a single-core plastic connector, which is provided with a plug assembly and a socket assembly which are in plug-in fit; the plug assembly comprises a plug handle, a plug liner and a plug shell, wherein the plug handle is rotationally connected to the outer wall of the plug shell, elastic pressing sheets which are oppositely arranged are arranged on the inner wall of the plug handle, pressing heads are arranged on the elastic pressing sheets respectively, rotating arc grooves are formed in the two sides of the plug shell, and a first self-locking hole and a second self-locking hole are respectively formed in the two ends of the rotating arc grooves; the socket assembly comprises a socket shell, a socket liner, a plurality of socket terminals and sealing gaskets, locking rods which are oppositely arranged are arranged on two sides of the socket shell, locking arc grooves are formed on two sides of a plug handle, the socket shell is spliced on the plug liner through sliding fit of the locking rods and the locking arc grooves and fit of a pressing head and the rotating arc grooves, and the socket shell is fixedly connected with the plug shell through fit of the pressing head and a second self-locking hole. The utility model has smart structure, and is convenient and practical.

Description

Single-core plastic connector

Technical Field

The utility model relates to the field of connectors, in particular to a single-core plastic connector.

Background

The connector is a connecting piece frequently used in cable connection work, different cables are electrically connected through two different connections, the connector generally comprises a plug assembly and a socket assembly, and the socket assembly can extend into the plug assembly so that the male terminal is electrically connected with the cables. With the rapid development of new energy, various automobiles, motorcycles, battery cars, etc. are used, and an electric connector for charging the same is further developed and popularized.

In prior art, in the in-process of wiring in two-wheeled electric cars such as storage battery car, socket assembly carries out the electricity through grafting or screw-thread fit's mode and is connected to operating personnel's installation, but with the long-term use of two-wheeled electric car, and road conditions's difference, two-wheeled electric car can often take place to jolt because of the unevenness on road surface or the hindrance on the road surface, for example the hindrance of some stones, under long-term jolt environment, can take place to become flexible or the condition that drops through grafting or screw-thread fit's between plug assembly and the socket assembly, once take place to become flexible or drop between plug assembly and the socket assembly, then the storage battery in the two-wheeled electric car will not be unable to carry out continuous power supply to the electric car, and then influence the normal use of electric car, and is very inconvenient.

Disclosure of Invention

The utility model aims to provide a single-core plastic connector which has a smart structure, can realize quick connection and fixation between a plug assembly and a socket assembly, can prevent separation between the socket assembly and the plug assembly in the use process, has better adjustability and applicability, and is smart in structure, convenient and practical.

The technical scheme for realizing the aim of the utility model is as follows: the utility model has plug assembly and socket assembly of the plug-in fit; the plug assembly comprises a plug handle, a plug liner and a plug shell, wherein a plurality of plug terminals are fixed on the plug liner, the plug liner is fixedly connected with the plug shell through plug-in fit, the plug handle is rotationally connected to the outer wall of the plug shell, side grooves which are oppositely arranged are formed in the inner wall of the plug handle, elastic pressing sheets integrally formed with the plug handle are arranged in the side grooves, pressing heads integrally formed with the elastic pressing sheets are arranged on the elastic pressing sheets, the pressing heads on the elastic pressing sheets are oppositely arranged, rotating arc grooves which are coaxially arranged with the rotating axis of the plug handle are formed in two sides of the plug shell, a first self-locking hole and a second self-locking hole are respectively formed in two ends of the rotating arc grooves, the first self-locking hole and the second self-locking hole are respectively positioned on extension lines of radian lines of the rotating arc grooves, and the pressing heads are slidingly arranged in the corresponding rotating arc grooves;

the socket assembly comprises a socket shell, a socket liner fixedly installed in the socket shell, a plurality of socket terminals installed on the socket liner and sealing gaskets fixedly installed on the socket shell, locking rods which are oppositely arranged are arranged on two sides of the socket shell, locking arc grooves which can be used for allowing the locking rods to penetrate through and slide in are formed in two sides of a plug handle, and the socket shell is spliced on the plug liner through sliding fit of the locking rods and the locking arc grooves and fit of a pressing head and the rotating arc grooves and fixedly connected with the plug shell through fit of the pressing head and a second self-locking hole.

Further, be equipped with on the inner wall of above-mentioned plug handle relative setting and with plug handle integrated into one piece's rotation bulge loop, all be equipped with spacing slider on each rotation bulge loop, the both sides of plug shell are equipped with the rotation slot that can supply to rotate bulge loop male, be equipped with the locating shaft in the rotation slot that can insert the rotation bulge loop, still be equipped with on the rotation slot with rotate the coaxial setting of slot, and can supply spacing slider gliding spacing spout, the plug handle rotates through the grafting cooperation of each rotation bulge loop and rotation slot, the grafting cooperation of locating shaft and rotation bulge loop and the sliding fit of spacing slider and spacing spout and connects on the plug shell.

Further, the locking rod comprises a connecting shaft fixed on the socket shell and positioning sliding blocks fixed on the connecting shafts, the locking arc grooves comprise first limiting arc grooves which are coaxially arranged with the rotating convex blocks and can slide on the connecting shafts, second limiting arc grooves which are coaxially arranged with the first limiting arc grooves 1-16 and can slide on the positioning sliding blocks, the first limiting arc grooves are communicated with the second limiting arc grooves, the groove width of the first limiting arc grooves is smaller than that of the second limiting arc grooves, and the plug handle performs limiting rotation with the socket shell through sliding fit of the connecting shafts and the corresponding first limiting arc grooves and sliding fit of the positioning sliding blocks and the second limiting arc grooves.

Further, at least one jack for inserting a cable is provided on the plug housing.

Further, a plurality of terminal holes are formed in the socket liner, each socket terminal is fixed on the socket liner through the insertion fit of the corresponding terminal hole, each socket terminal comprises an insertion portion capable of being inserted into the terminal hole and a semicircular connecting portion fixed on the insertion portion, and each socket terminal is fixed on the socket liner through the insertion fit of the insertion portion and the terminal hole.

Further, the outer wall of the socket liner, which is close to one end of the connecting part, is provided with a plurality of elastic buckles evenly distributed along the outline of the inner wall of the socket and a plurality of limit inserting strips arranged along the extending direction of the socket liner, the inner wall of the socket shell is provided with buckling grooves corresponding to the elastic buckles and limit inserting grooves for inserting the limit inserting strips, and the socket liner is fixed in the socket shell through the matching of the elastic buckles and the buckling grooves and the plugging matching of the limit inserting strips and the limit inserting grooves.

Further, a plurality of terminal holes are formed in the socket liner, each socket terminal is fixed on the socket liner through the insertion fit of the corresponding terminal hole, each socket terminal comprises an insertion portion capable of being inserted into the terminal hole and a circular connecting portion fixed on the insertion portion, and each socket terminal is fixed on the socket liner through the insertion fit of the insertion portion and the terminal hole.

Further, the outer wall of the socket liner is provided with a plurality of limiting clamping blocks, the inner wall of the socket shell is provided with limiting clamping grooves corresponding to the limiting clamping blocks, and the socket liner is fixed in the socket shell through the matching of the limiting clamping blocks and the limiting clamping grooves.

Further, the outer wall of the socket shell is provided with a side clamping block, the inner wall of the sealing gasket is provided with a side clamping groove corresponding to the side clamping block, and the sealing gasket is installed on the socket shell through the insertion fit of the side clamping block and the side clamping groove and is fixed through a locking piece.

The utility model has the positive effects that: (1) According to the utility model, the elastic pressing piece is arranged on the plug handle, the pressing head is arranged on the elastic pressing piece, the self-locking is formed through the matching of the pressing head and the first self-locking hole and the second self-locking hole, the locking rod is arranged on the socket shell, the rotating arc groove is arranged on the plug handle, the pressing head is separated from the first self-locking hole against resistance in the rotating matching process of the locking rod and the locking arc groove, then the socket shell and the plug inner container are firmly connected together gradually in the matching process of the pressing head and the rotating arc groove and the locking rod and the locking arc groove, the fixed connection of the socket shell and the plug inner container is realized after the pressing head enters the second self-locking hole, and the plug inner container and the inner container of the socket are electrically connected after the socket shell and the plug inner container are fixed, so that the problem that the two-wheel electric vehicle cannot be normally used due to loosening or falling off in the long-term use or jolt process of the socket component in the prior art is effectively solved, the tight and firm connection between the socket component and the socket component is effectively avoided, and the socket component is electrically connected through the tight connection, and the electric connection is ingenious and practical.

(2) According to the plug handle, through the plug-in fit of the rotating convex ring and the rotating slot on the plug handle and the plug-in fit of the positioning shaft and the rotating convex ring, the smoothness of rotation of the plug handle and the plug shell is guaranteed, meanwhile, the stability of the plug handle in rotation is guaranteed, in addition, the rotation of the plug handle can be effectively limited through the sliding fit of the limiting sliding block and the limiting sliding groove, the occurrence of over-rotation is avoided, and the plug handle is efficient and convenient.

(3) According to the utility model, the width of the first limiting arc groove is smaller than that of the second limiting arc groove, so that the stability of connection between the plug handle and the socket liner can be effectively ensured, and meanwhile, the locking rod can be prevented from being separated from the locking arc groove, so that the socket is safe and practical.

(4) The utility model is suitable for the requirements of various different two-wheeled electric vehicles on cable connection by arranging at least one jack, and has better applicability.

(5) According to the utility model, the socket terminal is arranged in a semicircular shape, so that the passing current amount can be increased by reducing the resistance, the function of increasing the current is realized, and the socket terminal is efficient and convenient.

(6) According to the socket inner container, the elastic buckle and the limiting insert are arranged on the outer wall of the socket inner container, and the elastic buckle is in plug-in fit with the buckling groove and the limiting insert is in plug-in fit with the limiting slot, so that on one hand, the stability of the socket inner container in the socket outer shell can be guaranteed, meanwhile, the stability of the socket inner container in the use process and the loosening or falling of the socket inner container in the use process can be effectively prevented through an assembly mode of excessively hard interference, and the socket inner container is safe and practical.

(7) According to the utility model, the socket terminal is arranged in a round shape, so that the stability and the firmness of connection between the socket liner and an external cable connector can be effectively enhanced, and the socket is convenient and practical.

(8) According to the socket inner container, the plurality of limiting clamping blocks are arranged on the outer wall of the socket inner container, and the corresponding limiting clamping grooves are formed in the inner wall of the socket outer container, so that on one hand, the installation of the socket inner container can be effectively guided, on the other hand, the stability of the socket inner container in the socket outer container is improved in a mode of inserting and matching the limiting clamping grooves with the limiting clamping blocks and hard interference, and the socket inner container is stable and practical.

(9) According to the utility model, the side clamping blocks are arranged on the outer wall of the socket shell, the side clamping grooves are arranged on the outer wall of the sealing gasket to position the installation of the sealing gasket, and meanwhile, the stability of the sealing gasket after being fixed with the socket shell is ensured, so that the sealing gasket is convenient and practical.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which

Fig. 1 is a schematic diagram of the overall structure of a single-core plastic connector according to the first embodiment;

FIG. 2 is a schematic overall structure of a plug assembly according to the first embodiment;

FIG. 3 is a schematic view showing the overall structure of a plug handle according to the first embodiment;

FIG. 4 is a schematic view showing the overall structure of a plug liner according to the first embodiment;

FIG. 5 is a schematic view showing the overall structure of a plug housing according to the first embodiment;

FIG. 6 is a schematic overall structure of a socket assembly according to the first embodiment;

fig. 7 is a schematic overall structure of a socket housing according to the first embodiment;

fig. 8 is a schematic diagram showing the overall structure of a plug terminal according to the first embodiment;

FIG. 9 is a schematic diagram showing the overall structure of a plug liner according to the first embodiment;

FIG. 10 is a schematic view showing the overall structure of a gasket according to the first embodiment;

fig. 11 is a schematic diagram showing the overall structure of a single-core plastic connector in the second embodiment;

fig. 12 is a schematic overall structure of a plug assembly in the second embodiment;

FIG. 13 is a schematic view showing the overall structure of a plug handle according to the second embodiment;

fig. 14 is a schematic overall structure of a plug liner according to the second embodiment;

fig. 15 is a schematic view showing the overall structure of a plug housing in the second embodiment;

fig. 16 is a schematic overall structure of a socket assembly in the second embodiment;

fig. 17 is a schematic diagram showing the overall structure of a socket housing in the second embodiment;

fig. 18 is a schematic diagram showing the overall structure of a plug terminal in the second embodiment;

fig. 19 is a schematic view showing the overall structure of a plug liner according to the second embodiment;

fig. 20 is a schematic view showing the overall structure of the gasket in the second embodiment.

Detailed Description

Example one

Referring to fig. 1 to 10, the present utility model relates to a single core plastic connector having a plug assembly 1 and a receptacle assembly 2 which are plug-fitted; the plug assembly 1 comprises a plug handle 1-1, a plug liner 1-2 and a plug shell 1-3, wherein a plurality of plug terminals 1-21 are fixed on the plug liner 1-2, the plug liner 1-2 is fixedly connected with the plug shell 1-3 through plug connection, the plug handle 1-1 is rotatably connected to the outer wall of the plug shell 1-3, side grooves 1-13 which are oppositely arranged are formed in the inner wall of the plug handle 1-1, elastic pressing sheets 1-14 which are integrally formed with the plug handle 1-1 are arranged in each side groove 1-13, pressing heads 1-15 which are integrally formed with the elastic pressing sheets 1-14 are arranged on each elastic pressing sheet 1-14, pressing heads 1-15 on each elastic pressing sheet 1-14 are oppositely arranged, rotating arc grooves 1-35 which are coaxially arranged with the rotating axis of the plug handle 1-1 are arranged on two sides of the plug shell 1-3, a first self-locking hole 1-34 and a second self-locking hole 1-35 are respectively arranged at two ends of each rotating arc groove 1-35, the first self-locking hole 1-34 and the second self-locking hole 1-35 are arranged on the corresponding arc grooves 1-35, and the corresponding arc grooves 1-35 are arranged on the rotating arc grooves 1-35;

the socket assembly 2 comprises a socket shell 2-1, a socket liner 2-3 fixedly arranged in the socket shell 2-1, a plurality of socket terminals 2-2 arranged on the socket liner 2-3 and sealing gaskets 2-4 fixedly arranged on the socket shell 2-1, locking rods which are oppositely arranged are arranged on two sides of the socket shell 2-1, locking arc grooves which can be penetrated by the locking rods and slide in the locking rods are arranged on two sides of a plug handle 1-1, and the socket shell 2-1 is spliced on the plug liner 1-2 through the sliding fit of the locking rods and the locking arc grooves and the fit of a pressing head 1-15 and a rotating arc groove 1-35 and is fixedly connected with the plug shell 1-3 through the fit of the pressing head 1-15 and a second self-locking hole 1-35.

The plug liner 1-2 is internally provided with a plurality of terminal holes and a plurality of corresponding plug terminals 1-21, each plug terminal 1-21 is fixed on the plug liner 1-2 through the plug-in fit with each corresponding terminal hole, each plug terminal 1-21 comprises a plug-in part 2-21 capable of being inserted into the terminal hole and a semicircular connecting part 2-22 fixed on the plug-in part 2-21, and each plug terminal 1-21 is fixed on the plug liner 1-2 through the plug-in fit of the plug-in part 2-21 and the terminal hole.

The plug liner 1-2 is fixedly assembled with the plug shell 1-3 by means of glue injection after being pressed into the plug terminal 1-21.

The plug handle 1-1 is characterized in that the inner wall of the plug handle 1-1 is provided with rotating convex rings 1-11 which are oppositely arranged and integrally formed with the plug handle 1-1, each rotating convex ring 1-11 is provided with a limiting slide block 1-12, two sides of the plug shell 1-3 are provided with rotating slots 1-31 into which the rotating convex rings 1-11 can be inserted, the rotating slots 1-31 are internally provided with positioning shafts 1-32 which can be inserted into the rotating convex rings 1-11, the rotating slots 1-31 are also provided with limiting slide grooves 1-33 which are coaxially arranged with the rotating slots 1-31 and can be used for sliding the limiting slide blocks 1-12, and the plug handle 1-1 is rotationally connected with the plug shell 1-3 through the insertion fit of each rotating convex ring 1-11 and the insertion fit of the positioning shafts 1-32 and the rotating convex rings 1-11 as well as the sliding fit of the limiting slide blocks 1-12 and the limiting slide grooves 1-33.

The locking rod comprises a connecting shaft 2-11 fixed on a socket shell 2-1 and a positioning sliding block 2-12 fixed on each connecting shaft 2-11, the locking arc groove comprises a first limiting arc groove 1-16 which is coaxially arranged with a rotating lug and can slide each connecting shaft 2-11, and a second limiting arc groove 1-17 which is coaxially arranged with the first limiting arc groove 1-16 and can slide the positioning sliding block 2-12, the first limiting arc groove 1-16 is communicated with the second limiting arc groove 1-17, the groove width of the first limiting arc groove 1-16 is smaller than the groove width of the second limiting arc groove 1-17, and the plug handle 1-1 performs limiting rotation with the socket shell 2-1 through sliding fit of each connecting shaft 2-11 and the corresponding first limiting arc groove 1-16 and sliding fit of each positioning sliding block 2-12 and the second limiting arc groove 1-17.

After the socket liner 2-3 is installed in the socket shell 2-1 in a hard interference mode, the sealing gasket 2-4 is fixed on the socket shell 2-1 through a locking piece.

The plug housing 1-3 is provided with a jack into which a cable can be inserted.

The socket liner 2-3 is internally provided with a plurality of terminal holes, each socket terminal 2-2 is fixed on the socket liner 2-3 through the plug-in fit with each corresponding terminal hole, the socket terminal 2-2 comprises a plug-in part 2-21 capable of being inserted into the terminal hole and a semicircular connecting part 2-22 fixed on the plug-in part 2-21, and each socket terminal 2-2 is fixed on the socket liner 2-3 through the plug-in fit of the plug-in part 2-21 and the terminal hole.

The socket comprises a socket shell 2-1, and is characterized in that a plurality of elastic buckles 2-31 uniformly distributed along the outline of the inner wall of the socket and a plurality of limiting inserting strips 2-32 arranged along the extending direction of the socket shell 2-3 are arranged on the outer wall of the socket inner container 2-3, which is close to one end of the connecting portion 2-22, a buckling groove corresponding to each elastic buckle 2-31 and a limiting inserting groove for inserting the limiting inserting strips 2-32 are arranged on the inner wall of the socket shell 2-1, and the socket inner container 2-3 is fixed in the socket shell 2-1 through the matching of each elastic buckle 2-31 and the buckling groove and the plugging matching of the limiting inserting strips 2-32 and the limiting inserting grooves.

Example two

Referring to fig. 11 to 20, the plug housing 1-3 of the present utility model is provided with two insertion holes for inserting cables.

The plug liner 1-2 is internally provided with a plurality of terminal holes and a plurality of corresponding plug terminals 1-21, each plug terminal 1-21 is fixed on the plug liner 1-2 through the plug-in fit with each corresponding terminal hole, each plug terminal 1-21 comprises a plug-in part 2-21 capable of being inserted into the terminal hole and a connecting part 2-22 fixed on the plug-in part 2-21 and in a circular shape, and each plug terminal 1-21 is fixed on the plug liner 1-2 through the plug-in fit of the plug-in part 2-21 and the terminal hole.

The socket liner 2-3 is internally provided with a plurality of terminal holes, each socket terminal 2-2 is fixed on the socket liner 2-3 through the plug-in fit with each corresponding terminal hole, the socket terminal 2-2 comprises a plug-in part 2-21 capable of being inserted into the terminal hole and a connecting part 2-22 fixed on the plug-in part 2-21 and in a circular shape, and each socket terminal 2-2 is fixed on the socket liner 2-3 through the plug-in fit of the plug-in part 2-21 and the terminal hole.

The socket comprises a socket shell 2-1, and is characterized in that a plurality of limiting clamping blocks 2-33 are arranged on the outer wall of the socket liner 2-3, limiting clamping grooves 2-13 corresponding to the limiting clamping blocks 2-33 are arranged on the inner wall of the socket shell 2-1, and the socket liner 2-3 is fixed in the socket shell 2-1 through the matching of the limiting clamping blocks 2-33 and the limiting clamping grooves 2-13.

The socket comprises a socket shell 2-1, wherein a side clamping block 2-14 is arranged on the outer wall of the socket shell 2-1, a side clamping groove 2-41 corresponding to the side clamping block 2-14 is arranged on the inner wall of a sealing gasket 2-4, and the sealing gasket 2-4 is installed on the socket shell 2-1 through the plug-in fit of the side clamping block 2-14 and the side clamping groove 2-41 and is fixed through a locking piece.

The other technical features are the same as those in the first embodiment.

The working principle of the utility model is as follows: in the using process, firstly, the plug assembly 1 is assembled, each plug terminal 1-21 is pressed into a corresponding terminal hole, the fixed connection between the plug terminal 1-21 and the plug liner 1-2 is realized, the plug liner 1-2 is connected with the plug shell 1-3 in a plugging manner and is fixedly connected in a glue injection manner, and the plug handle 1-1 is in rotary connection with the plug shell 1-3 through the plugging fit of the rotary convex ring 1-11 and the rotary slot 1-31, the plugging fit of the positioning shaft 1-32 and the rotary convex ring 1-11 and the fit of the limit sliding block 1-12 and the limit sliding groove 1-33;

assembling the socket assembly 2, pressing each socket terminal 2-2 into a corresponding terminal hole to realize the fixed connection of the socket terminal 2-2 and the socket liner 2-3, inserting the socket liner 2-3 into the socket shell 2-1 in a hard interference mode, and fixedly mounting the sealing gasket 2-4 on the shell through a locking piece;

finally, the socket assembly 2 and the plug assembly 1 are assembled, after the upper end of the socket housing 2-1 is spliced with the lower end of the plug liner 1-2 in a splicing manner, each locking rod is positioned in a corresponding locking sliding groove, when in an initial position, the pressure head 1-15 is positioned in the first self-locking hole 1-34, an operator can enter the second self-locking hole 1-35 to realize self-locking after passing through the rotating arc groove 1-35 by overcoming resistance, at the moment, the locking rods can not rotate any more, the socket housing 2-1 and the plug housing 1-3 are fixedly connected, and after the socket housing 2-1 is fixedly connected with the plug liner 1-2, the plug liner 1-2 and the socket liner 2-3 are electrically connected through the connection cooperation of the plug terminal 1-21 and the socket terminal 2-2, so that the problem that the socket assembly 2 and the plug assembly 1 fall off due to environmental factors and the connection in a connector are interrupted in the prior art is effectively solved, and the normal running structure of a two-wheel electric car such as a storage battery car is effectively ensured, and the structure is stable and practical.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims (9)

1. Single core plastic connector, its characterized in that: a plug assembly and a receptacle assembly having a mating plug-in connection; the plug assembly comprises a plug handle, a plug liner and a plug shell, wherein a plurality of plug terminals are fixed on the plug liner, the plug liner is fixedly connected with the plug shell through plug-in fit, the plug handle is rotationally connected to the outer wall of the plug shell, side grooves which are oppositely arranged are formed in the inner wall of the plug handle, elastic pressing sheets integrally formed with the plug handle are arranged in the side grooves, pressing heads integrally formed with the elastic pressing sheets are arranged on the elastic pressing sheets, the pressing heads on the elastic pressing sheets are oppositely arranged, rotating arc grooves which are coaxially arranged with the rotating axis of the plug handle are formed in two sides of the plug shell, a first self-locking hole and a second self-locking hole are respectively formed in two ends of the rotating arc grooves, the first self-locking hole and the second self-locking hole are respectively positioned on extension lines of radian lines of the rotating arc grooves, and the pressing heads are slidingly arranged in the corresponding rotating arc grooves;

the socket assembly comprises a socket shell, a socket liner fixedly installed in the socket shell, a plurality of socket terminals installed on the socket liner and sealing gaskets fixedly installed on the socket shell, locking rods which are oppositely arranged are arranged on two sides of the socket shell, locking arc grooves which can be used for allowing the locking rods to penetrate through and slide in are formed in two sides of a plug handle, and the socket shell is spliced on the plug liner through sliding fit of the locking rods and the locking arc grooves and fit of a pressing head and the rotating arc grooves and fixedly connected with the plug shell through fit of the pressing head and a second self-locking hole.

2. The single core plastic connector of claim 1, wherein: the plug is characterized in that the inner wall of the plug handle is provided with rotating convex rings which are oppositely arranged and integrally formed with the plug handle, each rotating convex ring is provided with a limiting sliding block, two sides of the plug shell are provided with rotating slots into which the rotating convex rings are inserted, positioning shafts which can be inserted into the rotating convex rings are arranged in the rotating slots, limiting sliding grooves which are coaxially arranged with the rotating slots and can be used for sliding the limiting sliding blocks are further formed in the rotating slots, and the plug handle is rotationally connected to the plug shell through the insertion fit of each rotating convex ring and the rotating slot, the insertion fit of the positioning shafts and the rotating convex rings and the sliding fit of the limiting sliding blocks and the limiting sliding grooves.

3. The single core plastic connector of claim 2, wherein: the locking rod comprises connecting shafts fixed on a socket shell and positioning sliding blocks fixed on the connecting shafts, the locking arc grooves comprise first limiting arc grooves which are coaxially arranged with the rotating convex blocks and can be used for sliding of the connecting shafts, second limiting arc grooves which are coaxially arranged with the first limiting arc grooves and can be used for sliding of the positioning sliding blocks, the first limiting arc grooves are communicated with the second limiting arc grooves, the groove width of the first limiting arc grooves is smaller than that of the second limiting arc grooves, and the plug handle performs limiting rotation with the socket shell through sliding fit of the connecting shafts and the corresponding first limiting arc grooves and sliding fit of the positioning sliding blocks and the second limiting arc grooves.

4. A single core plastic connector according to claim 3, wherein: at least one jack for inserting a cable is arranged on the plug shell.

5. The single core plastic connector of claim 4, wherein: the socket comprises a socket liner and is characterized in that a plurality of terminal holes are formed in the socket liner, each socket terminal is fixed on the socket liner through plug-in fit with each corresponding terminal hole, and comprises a plug-in portion capable of being inserted into the terminal hole and a semicircular connecting portion fixed on the plug-in portion, and each socket terminal is fixed on the socket liner through plug-in fit between the plug-in portion and the terminal hole.

6. The single core plastic connector of claim 5, wherein: the socket comprises a socket shell, and is characterized in that a plurality of elastic buckles uniformly distributed along the outline of the inner wall of the socket and a plurality of limiting inserts arranged along the extending direction of the socket inner wall are arranged on the outer wall of the socket inner container, which is close to one end of the connecting part, and a buckling groove corresponding to each elastic buckle and a limiting slot for the insertion of the limiting inserts are arranged on the inner wall of the socket shell, and the socket inner container is fixed in the socket shell through the matching of each elastic buckle and the buckling groove and the plugging matching of the limiting inserts and the limiting slots.

7. The single core plastic connector of claim 4, wherein: the socket comprises a socket liner and is characterized in that a plurality of terminal holes are formed in the socket liner, each socket terminal is fixed on the socket liner through plug-in fit with each corresponding terminal hole, and comprises a plug-in portion capable of being inserted into the terminal hole and a connecting portion fixed on the plug-in portion and in a circular shape, and each socket terminal is fixed on the socket liner through plug-in fit between the plug-in portion and the terminal hole.

8. The single core plastic connector of claim 7, wherein: the socket comprises a socket shell, and is characterized in that a plurality of limiting clamping blocks are arranged on the outer wall of the socket liner, limiting clamping grooves corresponding to the limiting clamping blocks are arranged on the inner wall of the socket shell, and the socket liner is fixed in the socket shell through the matching of the limiting clamping blocks and the limiting clamping grooves.

9. The single core plastic connector of claim 8, wherein: the socket comprises a socket shell, and is characterized in that a side clamping block is arranged on the outer wall of the socket shell, a side clamping groove corresponding to the side clamping block is arranged on the inner wall of the sealing gasket, and the sealing gasket is installed on the socket shell through the plug-in fit of the side clamping block and the side clamping groove and is fixed through a locking piece.