CN212659735U - Stay cord electric connector that drops based on steel ball locking structure - Google Patents

Abstract

The utility model discloses an electric connector that drops of stay cord based on steel ball locking structure, including socket and plug, establish the front end of socket and the rear end interconnect of plug, the socket includes socket shell, steel ball and locate other socket subassembly in the socket shell, the plug includes plug shell, the go-between, first bush, first pressure spring, the second bush, the second pressure spring and locate other plug subassemblies in the plug shell, be equipped with first bush outer lug and first bush inner lug on the first bush bulge loop of first bush, be equipped with casing bar counter bore on the plug shell, be equipped with the intra-annular lug of go-between on the inner wall of go-between, cooperate the mechanism that splines between formation go-between and the plug shell together with second bush and second pressure spring. The utility model discloses utilize to spline the mechanism and can insert to close at socket and plug and be connected and draw and take off the separation process in and realize preventing the rotatory function of go-between, improve and insert and close connection efficiency and prevent the mistake and insert the ability, the stay cord can not rotatory knot, the dead risk of lock when having avoidd the separation.

Description

Stay cord electric connector that drops based on steel ball locking structure

Technical Field

The utility model relates to a stay cord electric connector that drops of mainly used aerospace navigation field especially relates to a stay cord electric connector that drops based on steel ball locking structure.

Background

In the fields of aviation, aerospace and navigation, the division and the matrix are separated, and the division and the matrix need to be electrically connected, and the situation often needs to use a pull rope falling electric connector. The pull rope falling electric connector comprises a socket and a plug, the plug is connected with a parent cable, and the parent is provided with a pull-off mechanism to adapt to the pull rope. The socket is mounted on the outer surface of the section. When the branch part is separated from the parent body, the parent body pull-off mechanism axially pulls the pull rope connected with the plug to enable the plug to be separated from the socket, and the pull rope needs to be matched with the parent body pull-off mechanism for use.

The traditional stay cord dropping electric connector mainly has a structure form of a multi-tile type multi-start thread locking structure, the mechanical service life of foreign imported products is about 100 times, the service life of domestic similar products in China is only dozens of times, and the reason is that when the stay cord pulls the unlocking mechanism to separate, sliding friction and a friction surface are generated between locking surfaces, so that the locking surfaces are seriously abraded, the separating force is large, the separation is not smooth, and the risk of locking exists during the separation.

Traditional steel ball locking type electric connector mainly is the rolling friction of steel ball when it connects, separates, and the friction surface is less, and wearing and tearing are less, and the life-span is longer, can effectively avoid above-mentioned traditional stay cord electric connector's that drops defect, therefore traditional steel ball locking type electric connector can migrate to the stay cord electric connector field that drops after optimizing and improving. However, the conventional steel ball locking type electrical connector has no pull rope mechanism and no connecting ring for connecting with a pull rope, so that it is obviously not feasible to simply apply the conventional steel ball locking type electrical connector to the field of pull rope falling electrical connectors.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stay cord electric connector that drops based on steel ball locking structure that can not relative rotation between go-between and the plug housing when inserting to close to connect and drawing to take off the separation just provides one kind in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a pull rope falling electric connector based on a steel ball locking structure comprises a socket and a plug, wherein the front end of the socket is connected with the rear end of the plug, the socket comprises a socket shell, steel balls and other socket components arranged in the socket shell, a plurality of riveting holes are uniformly formed in the circumferential outer wall, close to the front end, of the socket shell, the steel balls are respectively installed in the riveting holes, the plug comprises a plug shell, a connecting ring and other plug components arranged in the plug shell, and the plug shell is installed in the connecting ring; the plug also comprises a first bush, a first pressure spring, a second bush and a second pressure spring, the first bush is sleeved outside the plug shell and positioned in the connecting ring, an annular step protruding inwards is arranged on the inner wall in the connecting ring, a first bush convex ring protruding outwards is arranged at the front end of the first bush and can block the first bush convex ring to prevent the first bush convex ring from moving backwards, a shell convex ring protruding outwards is arranged on the circumferential outer wall close to the front end of the plug shell, two ends of the first pressure springs are respectively arranged in blind holes corresponding to the first bush convex ring and the shell convex ring, an annular groove is arranged on the circumferential outer wall close to the rear end of the plug shell, when the plug is connected with the socket, the steel balls are arranged in the annular groove, and the plug shell and the socket shell cannot rotate relatively, the plug comprises a plug shell, a first bushing convex ring, a second bushing convex ring, a connecting ring and a baffle ring, wherein the first bushing convex ring is provided with a first bushing outer convex block protruding outwards and a first bushing inner convex block protruding inwards, the pipe wall of the second bushing is provided with a bushing strip-shaped through hole which is axially in the front-back direction, is communicated with the inside and the outside and has an open rear end, the plug shell is provided with a shell strip-shaped counter bore which is axially in the front-back direction and has an open rear end, the first bushing inner convex block penetrates through the bushing strip-shaped through hole from outside to inside and is arranged in the shell strip-shaped counter bore, the second bushing is sleeved outside the plug shell and is positioned in the connecting ring, the first bushing is sleeved outside the second bushing through the through hole, the front end of the second bushing is provided with a second bushing convex ring protruding outwards, the second bushing convex ring is provided with a second bushing outer convex block and a baffle ring formed by forward, the rear end of the second liner outer convex block is closer to the rear end of the second liner than the rear end of the baffle ring, the top of the second liner outer convex block and the peripheral edge of the baffle ring are on the same positive circle, the second liner convex ring is provided with a plurality of pressure spring through holes, a plurality of first pressure springs respectively penetrate through the pressure spring through holes, two ends of the second pressure springs are respectively installed in corresponding blind holes on the second liner convex ring and the shell convex ring, the circumferential wall in front of the annular step on the inner wall of the connecting ring is provided with a plurality of connecting ring inner convex blocks protruding inwards, the distance between every two adjacent connecting ring inner convex blocks is larger than the width of the first liner outer convex block and the second liner outer convex block, and the distance between the rear end of the connecting ring inner convex block and the front end of the annular step is larger than the thickness of the first liner convex ring, the lug in the connecting ring can block the baffle ring to prevent the baffle ring from moving backwards.

In the structure, the structure of the socket is the same as or basically the same as that of a socket of a traditional pull rope falling electric connector based on a steel ball locking structure, a plug shell, a connecting ring, a first bushing, a first pressure spring and other plug components arranged in the plug shell are the same as the structure of the traditional plug in most parts, and different parts are mainly embodied in characteristic contents, wherein the first bushing and the first pressure spring are used for realizing the automatic locking function after the socket is connected with the plug; the structure is a new structure, and the structure is matched with the second bush and the second pressure spring together to form a rotation stopping mechanism between the connecting ring and the plug shell, and the rotation stopping mechanism not only can realize the function of preventing the connecting ring from rotating in the process of inserting, combining and connecting and pulling-off separation of the socket and the plug, but also can realize the rotatable function of the connecting ring after the socket is connected with the plug, so as to meet the use requirement.

Preferably, the second bushing outer convex block is one, and the corresponding baffle rings on two sides of the second bushing outer convex block are removed to form a notch, so that the second bushing outer convex block can more smoothly enter a gap between two adjacent connecting ring inner convex blocks; the first bushing outer convex block and the first bushing inner convex block are located at the same circumferential position on the first bushing convex ring, so that the processing is convenient, and the use requirements are met.

Preferably, to facilitate quick mounting of the plug housing within the coupling ring, the front end of the plug housing is connected to the inner wall of the front end of the coupling ring by a collar.

Furthermore, in order to improve the shielding function, a shielding ring with radial elasticity is installed on the outer wall of the plug housing between the rear end of the housing strip-shaped counter bore and the annular groove of the plug housing.

Further, in order to improve the sealing effect, a sealing ring is installed on the inner wall of the front end of the socket shell.

The beneficial effects of the utility model reside in that:

the utility model adds the first bush, the first pressure spring, the second bush and the second pressure spring, and arranges the first bush outer lug and the first bush inner lug on the first bush convex ring, the plug shell is provided with a shell strip-shaped counter bore, the inner wall of the connecting ring is provided with a connecting ring inner convex block, the structures are matched together to form a rotation stopping mechanism between the connecting ring and the plug shell, the rotation stopping mechanism can realize the function of preventing the connecting ring from rotating in the processes of inserting, connecting and pulling-out and separating the socket and the plug, in the inserting and connecting process, the connecting ring can not rotate relative to the plug shell, the pull rope can not rotate and knot, the plug shell and the socket shell can be conveniently and quickly aligned, the inserting and connecting efficiency and the misplug prevention capability are improved, in the pulling-out separation process, the plug can automatically find a proper separation direction, and the pull rope cannot rotate and knot, so that the locking risk in the separation process is avoided; meanwhile, the rotation stopping mechanism can achieve the rotatable function of the connecting ring after the socket is connected with the plug, and the use requirements are met.

Drawings

Fig. 1 is a perspective view of the pull cord off electrical connector based on the steel ball locking structure according to the present invention after assembly and when the plug and the socket are not connected;

fig. 2 is an exploded perspective view of the pull cord dropping electrical connector based on the steel ball locking structure according to the present invention before assembly;

fig. 3 is a front view of the socket housing of the pull cord off electrical connector according to the present invention;

fig. 4 is an assembled cross-sectional view of the socket of the pull cord off electrical connector based on the steel ball locking structure of the present invention;

fig. 5 is an exploded perspective view of the pull cord off electrical connector based on the steel ball locking structure of the present invention before assembly;

fig. 6 is an exploded perspective view of the socket housing and related components of the pull cord off electrical connector according to the steel ball locking structure of the present invention before assembly;

fig. 7 is a perspective view of the connection ring of the pull cord dropping electrical connector based on the steel ball locking structure according to the present invention;

fig. 8 is one of assembled cross-sectional views of the plug of the pull cord off electrical connector according to the present invention;

fig. 9 is a second assembled cross-sectional view of the plug of the pull cord off electrical connector based on the steel ball locking structure of the present invention, which is a front view and a top view of fig. 8;

fig. 10 is a cross-sectional view of the pull cord off electrical connector according to the present invention before the connection between the plug and the socket;

fig. 11 is a cross-sectional view of the pull cord dropping electrical connector based on the steel ball locking structure in the process of connecting the plug and the socket;

fig. 12 is a cross-sectional view of the pull cord dropping electric connector according to the present invention after the plug and the socket are connected.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-9, the pull rope falling-off electrical connector based on the steel ball locking structure of the present invention includes a socket 40 and a plug 30, the front end of the socket 40 is connected to the rear end of the plug 30, that is, the direction of the pull rope (not marked in fig. 1) in fig. 1 is taken as the front, the socket 40 includes a socket housing 2, steel balls 3 and other socket components (conventional components, described below) arranged in the socket housing 2, a plurality of riveting holes O are uniformly arranged on the circumferential outer wall of the socket housing 2 near the front end, a plurality of steel balls 3 are respectively arranged in the riveting holes O, and a sealing ring 1 is arranged on the inner wall of the front end of the socket housing 2; the plug includes a plug housing, a coupling ring, and other plug components disposed within the plug housing, the plug housing being mounted within the coupling ring; the plug further comprises a first bush and a first compression spring, the plug 30 comprises a plug housing 21, a connecting ring 18, a first bush 15, a first compression spring 14, a second bush 13, a second compression spring 12 and other plug components (conventional components, described below) arranged in the plug housing 21, the plug housing 21 is arranged in the connecting ring 18, the front end of the plug housing 21 is connected with the inner wall of the front end of the connecting ring 18 through a clamping ring 11, the first bush 15 is sleeved outside the plug housing 21 and located in the connecting ring 18, an annular step D protruding inwards is arranged on the inner wall in the connecting ring 18, a first bush convex ring C protruding outwards is arranged at the front end of the first bush 15, the annular step D can block the first bush convex ring C to prevent the first bush convex ring C from moving backwards, a housing convex ring (not marked in the figure) protruding outwards is arranged on the circumferential outer wall close to the front end of the plug housing 21, and two ends of a plurality of (7 in the figure) first compression springs 14 are respectively arranged on the first bush convex ring C and the housing convex ring C In the corresponding blind hole (not visible in the figure) on the ring, the circumference outer wall close to the rear end on the plug shell 21 is provided with an annular groove K, when the plug 30 is connected with the socket 40, the steel ball 3 is arranged in the annular groove K, and the plug shell 21 and the socket shell 2 can not rotate relatively, the same circumference position on the first bush convex ring C is provided with a first bush outer convex block L which protrudes outwards and a first bush inner convex block G which protrudes inwards, the pipe wall of the second bush 13 is provided with a bush strip through hole H which is axially in the front-back direction and is communicated with the inside and the outside and has an opening at the rear end, the plug shell 21 is provided with a shell strip counter bore J which is axially in the front-back direction and has an opening at the rear end (the shell strip counter bore J can also be a through hole), the first bush inner convex block G passes through the bush strip through hole H from the outside to the inside and is arranged in the shell strip counter bore J, the second bush 13 is sleeved outside the plug shell 21 and, the front end of the second bush 13 is provided with a second bush convex ring (not marked in the figure) protruding outwards, the second bush convex ring is provided with a second bush outer convex block E and a baffle ring A formed by forward thickness reduction, the front end of the baffle ring A is flush with the front end of the second bush outer convex block E, the rear end of the second bush outer convex block E is closer to the rear end of the second bush 13 than the rear end of the baffle ring A, the top of the second bush outer convex block E and the peripheral edge of the baffle ring A are on the same positive circle, the second bush outer convex block E is a notch formed by removing the baffle ring A corresponding to two sides of the second bush outer convex block E, the second bush convex ring is provided with a plurality of pressure spring through holes (not marked in the figure) and a plurality of first pressure springs 14 respectively penetrate the plurality of pressure spring through holes, two ends of a plurality of (3 in the figure) of second pressure springs 12 are respectively installed in corresponding blind holes (not visible in the second bush convex ring and the shell convex ring), a plurality of inward-protruding lugs B in the connecting ring are arranged on the circumferential wall of the inner wall of the connecting ring 18, which is positioned in front of the annular step D, the distance between every two adjacent lugs B in the connecting ring, namely the width of the gap F, is greater than the width of the first bush outer lug L and the second bush outer lug E, the distance between the rear end of the lug B in the connecting ring and the front end of the annular step D is greater than the thickness of the first bush convex ring C, and the lugs B in the connecting ring can block the baffle ring A to prevent the baffle ring A from moving backwards; a radially elastic shield ring 22 is mounted on the outer wall of the plug housing 21 at a position between the rear end of the housing strip-shaped counterbore J and the annular groove K of the plug housing 21.

As shown in fig. 1 to 12, in order to describe the structure and the operation principle of the pull cord dropping electrical connector based on the steel ball locking structure more precisely and specifically, the following description is made with reference to the accompanying drawings and other various detailed structures.

As shown in fig. 1-4, in the socket 40, the gear sleeve 6 is arranged in the hole of the needle insulator 5, and then the small boss of the insulating pressure plate 8 blocks the gear sleeve 6, so that the gear sleeve 6 cannot axially fall out; the interface pad 4 and the needle insulator 5, the needle insulator 5 and the insulating pressing plate 8, and the insulating pressing plate 8 and the wire sealing body 9 are bonded by glue; after bonding, the interface gasket 4, the needle insulator 5, the insulating pressing plate 8, the wire sealing body 9 and the gear sleeve 6 form an assembly which is called a needle insulator assembly; the male key W of the pin insulator 5 fits within the female key P of the socket housing 2 preventing rotation between the pin insulator assembly and the socket housing 2; the fixing ring 10 mechanically fixes the pin insulator assembly into the socket housing 2 by catching a step in the cavity of the socket housing 2; silica gel is filled and sealed in a gap enclosed by the fixing ring 10, the needle insulator assembly and the seat shell 2; a contact pin 7 (a lead needs to be crimped when the contact pin is used) penetrates through a hole of the wire sealing body 9 and is arranged in the pin insulator component, and the tooth sleeve 6 fixes the contact pin 7 to prevent the contact pin from axially withdrawing; the through hole U of the wire sealing body 9 wraps the outer rubber of the lead tightly to realize the sealing of the tail part of the socket with the outside; the socket shell 2 is designed with an external thread Z and an anti-rotation tooth I which can be matched with the accessory at the tail part of the protection wire for use.

As shown in fig. 5-9, in the plug 30, the gear sleeve 6 is arranged in the hole of the hole insulator 20, and then the small boss of the insulating pressure plate 8 blocks the gear sleeve 6, so that the gear sleeve 6 cannot axially fall off; the interface gasket 4 and the hole insulator 20, the hole insulator 20 and the insulating pressing plate 8, and the insulating pressing plate 8 and the wire sealing body 9 are bonded by glue; after bonding, the interface gasket 4, the hole insulator 20, the insulating pressing plate 8, the wire sealing body 9 and the gear sleeve 6 form an assembly which is called a hole insulator assembly; the male key R of the bore insulator 20 fits within the female key M of the plug housing 21 to prevent rotation between the bore insulator assembly and the plug housing 21; the retainer ring 10 mechanically secures the bore insulator assembly in the plug housing 21 by snapping over a step in the cavity of the plug housing 21; silica gel is filled and sealed in a gap enclosed by the fixing ring 10, the hole insulator assembly and the plug shell 21; the jack 19 (a lead needs to be crimped when the plug is used) penetrates through the hole of the wire sealing body 9 and is arranged in the hole insulator component, and the gear sleeve 6 fixes the jack 19 to prevent the jack from axially withdrawing; the shielding ring 22 is arranged in the groove of the outer diameter of the plug shell 21; the assembly formed by the hole insulator assembly, the jack 19, the fixing ring 10, the shielding ring 22 and the head shell 21 is called a plug semi-finished product assembly; the clamping ring 11 is arranged in a groove on the inner wall of the connecting ring 18 and clamps the semi-finished plug assembly to prevent the semi-finished plug assembly from axially popping relative to the connecting ring 18; the pull rope (generally a steel rope) 16 passes through two holes of the connecting ring 18 and is riveted and fixed by a rivet sleeve 17. The through hole U of the wire sealing body 9 wraps the outer rubber of the lead tightly to realize the sealing of the tail part of the plug and the outside; the plug shell 21 is designed with external threads X and anti-rotation teeth Y which can be matched with accessories at the tail part of the protection wire for use.

Description of the drawings: the above-mentioned structure and use of the gear sleeve 6, the insulating pressing plate 8, the wire sealing body 9 and the fixing ring 10 in the socket 40 and the plug 30 are the same or similar, so the same reference numerals are used.

As shown in fig. 1-12, the working principle of the pull rope dropping electric connector based on the steel ball locking structure of the present invention is as follows:

(1) before the plug 30 and the socket 40 are plugged and connected: the second compression spring 12 is compressed between the plug housing 21 and the second bush 13; under the action of the second pressure spring 12, the baffle ring A of the second bush 13 is tightly attached to the inner convex block B of the connecting ring 18; the first compression spring 14 is compressed between the plug housing 21 and the first bush 15; under the action of the first pressure spring 14, the first bush convex ring C of the first bush 15 is tightly attached to the annular step D of the connecting ring 18; the second bush outer projection E of the second bush 13 falls in the clearance F of the connection ring 18, so that the second bush 13 and the connection ring 18 cannot rotate; the first bush inner convex block G of the first bush 15 passes through the bush strip-shaped through hole H of the second bush 13 and then falls into the shell strip-shaped counter bore J of the plug shell 21, so that the plug shell 21, the second bush 13 and the first bush 15 cannot rotate; so that the plug housing 21 and the connection ring 18 cannot rotate relative to each other.

(2) During the insertion connection process of the plug 30 and the socket 40: the steel balls 3 push the first bush 15 to compress the first pressure spring 14; the socket shell 2 pushes the second bush 13 to compress the second compression spring 12; the inner wall of the socket housing 2 compresses the shield ring 22; the first bush outer projection L of the first bush 15 enters the gap F of the connection ring 18, so that the first bush 15 and the connection ring 18 cannot rotate; the second bush outer projection E of the second bush 13 exits the gap F of the connection ring 18; the first bush inner convex block G of the first bush 15 passes through the bush strip-shaped through hole H of the second bush 13 and then falls into the shell strip-shaped counter bore J of the plug shell 21, so that the plug shell 21, the second bush 13 and the first bush 15 cannot rotate; so that the plug housing 21 and the connection ring 18 cannot rotate; five plug projections N of the plug housing 21 fall into five socket grooves Q of the socket housing 2, and the misplug prevention function and the rotation stop function between the plug 30 and the socket 40 are realized.

(3) After the plug 30 and the socket 40 are inserted and connected in place: the steel ball 3 falls into the annular groove K of the plug shell 21; under the action of the first pressure spring 14, the first bush convex ring C of the first bush 15 is tightly attached to the annular step D of the connecting ring 18; the inner wall surface of the first bush 15 blocks the steel balls 3 so that the steel balls 3 cannot be withdrawn from the annular groove K of the plug housing 21; the plug 30 and the socket 40 are fixedly connected in a plugging way; the inner wall of the socket housing 2 compresses the shield ring 22; the first bush outer protrusion L of the first bush 15 exits the gap F of the connection ring 18, so that the first bush 15 and the connection ring 18 can rotate; the second bush outer protrusion E of the second bush 13 exits the gap F of the connection ring 18, so that the second bush 13 and the connection ring 18 can rotate; the first bush inner convex block G of the first bush 15 passes through the bush strip-shaped through hole H of the second bush 13 and then falls into the shell strip-shaped counter bore J of the plug shell 21, so that the plug shell 21, the second bush 13 and the first bush 15 cannot rotate; so that the plug housing 21 and the connection ring 18 can rotate; at the moment, the contact pin 7 and the jack 19 are inserted in place and communicated; the plug housing 21 and the receptacle housing 2 are connected by a shielding ring 22; the plug shell 21 compresses the sealing ring 1 to realize the sealing between the plug 30 and the socket 40; the conical boss T of the interface gasket 4 is tightly squeezed with the conical surface S of the hole insulator 20, and each hole position is sealed.

(4) Pulling-off separation process of the plug 30 and the socket 40: the external mechanism pulls the pull rope 16 to move forwards, the pull rope 16 drives the connecting ring 18 to move forwards, the connecting ring 18 drives the first bush 15 to move forwards, the first bush 15 drives the plug shell 21 to move forwards by compressing the first pressure spring 14, and the annular groove K of the plug shell 21 drives the steel balls 3 to move forwards; the steel ball 3 is disengaged from the rear end of the first bush 15, and the steel ball 3 is immediately withdrawn from the annular groove K of the plug housing 21; under the action of the second pressure spring 12, the baffle ring A of the second bush 13 is tightly attached to the inner convex block B of the connecting ring 18; unlocking the plug 30 and the socket 40; under the action of the first pressure spring 14, the first bush convex ring C of the first bush 15 is tightly attached to the annular step D of the connecting ring 18; the second bush outer projection E of the second bush 13 falls in the clearance F of the connection ring 18, so that the second bush 13 and the connection ring 18 cannot rotate; the first bush inner convex block G of the first bush 15 passes through the bush strip-shaped through hole H of the second bush 13 and then falls into the shell strip-shaped counter bore J of the plug shell 21, so that the plug shell 21, the second bush 13 and the first bush 15 cannot rotate; so that the plug housing 21 and the connection ring 18 cannot rotate relative to each other.

In summary, the connector can realize the function of preventing the connecting ring 18 from rotating in the process of inserting, closing, connecting and pulling-out and separating the socket 40 and the plug 30, and can realize the function of rotating the connecting ring 18 after the socket 40 is connected with the plug 30, thereby meeting the use requirements.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (5)

1. A pull rope falling electric connector based on a steel ball locking structure comprises a socket and a plug, wherein the front end of the socket is connected with the rear end of the plug, the socket comprises a socket shell, steel balls and other socket components arranged in the socket shell, a plurality of riveting holes are uniformly formed in the circumferential outer wall, close to the front end, of the socket shell, the steel balls are respectively installed in the riveting holes, the plug comprises a plug shell, a connecting ring and other plug components arranged in the plug shell, and the plug shell is installed in the connecting ring; the method is characterized in that: the plug also comprises a first bush, a first pressure spring, a second bush and a second pressure spring, the first bush is sleeved outside the plug shell and positioned in the connecting ring, an annular step protruding inwards is arranged on the inner wall in the connecting ring, a first bush convex ring protruding outwards is arranged at the front end of the first bush and can block the first bush convex ring to prevent the first bush convex ring from moving backwards, a shell convex ring protruding outwards is arranged on the circumferential outer wall close to the front end of the plug shell, two ends of the first pressure springs are respectively arranged in blind holes corresponding to the first bush convex ring and the shell convex ring, an annular groove is arranged on the circumferential outer wall close to the rear end of the plug shell, when the plug is connected with the socket, the steel balls are arranged in the annular groove, and the plug shell and the socket shell cannot rotate relatively, the plug comprises a plug shell, a first bushing convex ring, a second bushing convex ring, a connecting ring and a baffle ring, wherein the first bushing convex ring is provided with a first bushing outer convex block protruding outwards and a first bushing inner convex block protruding inwards, the pipe wall of the second bushing is provided with a bushing strip-shaped through hole which is axially in the front-back direction, is communicated with the inside and the outside and has an open rear end, the plug shell is provided with a shell strip-shaped counter bore which is axially in the front-back direction and has an open rear end, the first bushing inner convex block penetrates through the bushing strip-shaped through hole from outside to inside and is arranged in the shell strip-shaped counter bore, the second bushing is sleeved outside the plug shell and is positioned in the connecting ring, the first bushing is sleeved outside the second bushing through the through hole, the front end of the second bushing is provided with a second bushing convex ring protruding outwards, the second bushing convex ring is provided with a second bushing outer convex block and a baffle ring formed by forward, the rear end of the second liner outer convex block is closer to the rear end of the second liner than the rear end of the baffle ring, the top of the second liner outer convex block and the peripheral edge of the baffle ring are on the same positive circle, the second liner convex ring is provided with a plurality of pressure spring through holes, a plurality of first pressure springs respectively penetrate through the pressure spring through holes, two ends of the second pressure springs are respectively installed in corresponding blind holes on the second liner convex ring and the shell convex ring, the circumferential wall in front of the annular step on the inner wall of the connecting ring is provided with a plurality of connecting ring inner convex blocks protruding inwards, the distance between every two adjacent connecting ring inner convex blocks is larger than the width of the first liner outer convex block and the second liner outer convex block, and the distance between the rear end of the connecting ring inner convex block and the front end of the annular step is larger than the thickness of the first liner convex ring, the lug in the connecting ring can block the baffle ring to prevent the baffle ring from moving backwards.

2. The pull-cord-off electrical connector based on the steel ball locking structure according to claim 1, wherein: the outer convex block of the second bushing is one, and the corresponding baffle rings on two sides of the outer convex block are removed to form a notch; the first bushing outer lug and the first bushing inner lug are located at the same circumferential position on the first bushing raised ring.

3. The pull-cord-off electrical connector based on the steel ball locking structure according to claim 1 or 2, wherein: the front end of the plug shell is connected with the inner wall of the front end of the connecting ring through a clamping ring.

4. The pull-cord-off electrical connector based on the steel ball locking structure according to claim 1 or 2, wherein: and a shielding ring with radial elasticity is arranged on the outer wall of the plug shell and between the rear end of the shell strip-shaped counter bore and the annular groove of the plug shell.

5. The pull-cord-off electrical connector based on the steel ball locking structure according to claim 1 or 2, wherein: and a sealing ring is arranged on the inner wall of the front end of the socket shell.

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