CN219040940U - Plug connector separating device - Google Patents

Abstract

The utility model discloses a plug connector separating device, which comprises a first plug connector and a second plug connector which can be electrically connected in a plug manner, wherein a first buckle on the side wall of the first plug connector and a second buckle on the side wall of the second plug connector can be buckled and connected with each other along with the plug connection of the first plug connector and the second plug connector, and the plug connector separating device comprises a tripping shifting arm and an elastic resetting piece.

Description

Plug connector separating device

Technical Field

The present utility model relates to a plug board connector, and more particularly to a plug connector separating device.

Background

The plug connector is generally formed by plugging the plug 100 and the socket 200 together to form electric connection, and because the traditional plug and the socket are plugged and then are completely dependent on the friction between the plug and the socket to realize positioning, when the plug and the socket are subjected to false collision or vibration, the line is disconnected due to easy loosening, so as to keep stable connection between the plug and the socket, the mode of fixedly connecting the plug and the socket together through a connecting piece appears in the market at present is as follows: the nut is arranged on the side wall of the socket, the connecting sleeve with the countersunk inner hole is arranged on the side wall of the plug, the screw 110 inserted in the connecting sleeve is fastened with the nut 210, so that the stability of the plug and the socket in operation is improved, however, when the plug 100 and the socket 200 are plugged and unplugged due to the mode, tools such as a screwdriver are required to operate the screw 110 to unscrew or screw, the fastening or loosening action is completed, the operation is inconvenient, the installation and disassembly efficiency is reduced, and the cost is increased.

Disclosure of Invention

In order to overcome the defects, the utility model provides the plug connector separating device which can ensure that the plug and the socket keep a stable connection state in the plug-in process, is convenient for the quick separation of the plug and the socket, and is convenient to use without tools.

The utility model adopts the technical scheme for solving the technical problems: the utility model provides a plug connector separator, includes first plug connector and second plug connector, first plug connector and second plug connector can the electric connection link to each other, be equipped with first buckle on the first plug connector lateral wall, be equipped with the second buckle on the second plug connector lateral wall, first buckle and second buckle can be connected along with the lock in the time of first plug connector and the second plug connector grafting, still are equipped with separator, separator includes trip poking arm and elasticity reset piece, establishes when first plug connector and second plug connector are pegged graft, and first plug connector slip direction is the place ahead, and when first plug connector and second plug connector were separated, first plug connector slip direction is the rear, the trip poking arm can be followed the installation of fore-and-aft direction slip settlement distance on first plug connector lateral wall, and trip poking arm slides to appointed position and can stir the second buckle and make it trip with first buckle, and elasticity reset piece provides the elasticity reset force that makes it break away from the second and poking position for the trip poking arm to slide.

As a further improvement of the utility model, a raised limit wall is arranged on the side wall of the first plug connector, a strip-shaped guide groove extending along the front-back direction is formed on the limit wall, the separating device further comprises a guide connecting wall, one end of the guide connecting wall is fixedly connected with the tripping toggle arm, the other end of the guide connecting wall is connected with the elastic resetting piece, the direction perpendicular to the front-back direction and parallel to the side wall of the first plug connector is set to be the left-right direction, a guide column extending along the left-right direction is fixedly arranged on the side wall of the guide connecting wall, and the guide column on the guide connecting wall can be slidably inserted into the strip-shaped guide groove on the limit wall.

As a further improvement of the utility model, the direction perpendicular to the front-back direction and the left-right direction is set as the up-down direction, the strip-shaped guide groove on the limiting wall is an inclined groove extending from the back upper direction to the front lower direction, the elastic resetting piece of the separating device is an elastic piece integrally formed on the guide connecting wall, the elastic deformation end of the elastic piece is tightly contacted with the side wall of the first plug connector, and the elastic piece is stressed to generate elastic deformation in the up-down direction.

As a further improvement of the utility model, the two guide connecting walls are arranged in parallel at intervals, a pressing connecting wall is fixedly arranged between the two guide connecting walls, the pressing connecting wall and the two guide connecting walls together form a U-shaped structure, the tripping toggle arm is fixedly arranged at the front end of the pressing connecting wall, the spring sheet is an arc elastic cantilever structure arranged at the rear end of the pressing connecting wall or an arc elastic sheet structure arranged under the two guide connecting walls or a first elastic cantilever structure arranged at the front lower part of the guide connecting walls and having a set included angle with the front lower part of the guide connecting walls, the limiting walls on the side wall of the first plug-in connector are two parallel at intervals, the U-shaped structure formed by the pressing connecting wall and the guide connecting walls together is sleeved outside the two limiting walls, and the spring sheet is inserted between the two limiting walls.

As a further improvement of the utility model, the limiting wall is also provided with a limiting open slot structure, the rear end of the pressing connecting wall can be inserted into the limiting open slot structure on the limiting wall, and the rear end of the pressing connecting wall is stopped on the bottom surface of the limiting open slot structure.

As a further improvement of the utility model, the pressing connecting wall is of an arc-shaped structure, the distance between the middle part of the pressing connecting wall and the side wall of the first plug connector is larger than the distance between the two ends of the pressing connecting wall and the first plug connector, and the position, opposite to the pressing connecting wall, of the limiting wall forms a convex arc-shaped structure.

As a further improvement of the utility model, the limiting wall on the first plug connector is also provided with a limiting groove with an opening direction facing the direction of the second plug connector, one end of the tripping and poking arm of the separating device, which is opposite to the direction of the second plug connector, is also provided with a limiting rib, and the limiting rib can be slidably inserted into the limiting groove.

As a further improvement of the utility model, the end part of the limiting rib forms a pointed structure with gradually reduced size, and the side wall of the limiting rib facing the side wall direction of the first plug connector is formed with an arc convex hull structure

As a further improvement of the utility model, the first buckle is a barb-shaped clamping hook structure on the side wall of the first plug connector, the second buckle comprises a second elastic cantilever structure positioned on the side wall of the second plug connector and a clamping hook hole positioned on the elastic cantilever structure, the elastic cantilever structure can be elastically covered on the outer side of the side wall of the first plug connector, and the barb-shaped clamping hook structure on the side wall of the first plug connector can be clamped in the clamping hook hole of the second elastic cantilever structure.

As a further improvement of the utility model, the end part of the second elastic cantilever structure on the side wall of the second plug connector is provided with a guide raised edge which extends obliquely towards the direction far away from the side wall of the first plug connector, the end part of the tripping shifting arm forms a triangular raised head structure with gradually reduced thickness, the surface of one side of the triangular raised head structure, facing the side wall of the first plug connector, is a flat structure which is flatly attached to the surface of the side wall of the first plug connector, and the triangular raised head structure can be accommodated in a triangular gap between the guide raised edge of the end part of the second elastic cantilever structure on the side wall of the second plug connector and the side wall of the second plug connector.

The beneficial effects of the utility model are as follows: according to the utility model, the first buckle and the second buckle are respectively arranged on the first plug connector and the second plug connector of the plug connector, and when the first buckle and the second buckle are plugged, the first buckle and the second buckle are automatically buckled and connected together, so that the situation that a plug and a socket loose when being impacted by vibration or external force is avoided, poor contact and even broken circuit are avoided, when the plug is pulled out of the socket, the trip poking arm of the separating device is only required to slide, the second buckle is poked by the trip poking arm to trip the first buckle, after the trip poking arm is released, the trip poking arm automatically resets under the action of the elastic reset piece, and the first plug connector and the second plug connector are conveniently and smoothly plugged and connected with each other in a quick-pull manner.

Drawings

FIG. 1 is a schematic exploded view of a prior art construction;

FIG. 2 is a perspective view of a plug connector according to the present utility model;

FIG. 3 is a perspective cross-sectional view of a plug connector according to the present utility model;

FIG. 4 is a first perspective view of a first connector of the present utility model;

FIG. 5 is a second perspective view of the first plug connector of the present utility model;

FIG. 6 is a side wall perspective view of a first connector of the present utility model;

FIG. 7 is an exploded view of a plug connector employing the present utility model;

FIG. 8 is a schematic structural view of a separator of the present utility model;

FIG. 9 is a first perspective view of the separation device of the present utility model;

FIG. 10 is a second perspective view of a separation device according to the present utility model;

FIG. 11 is a cross-sectional view taken along line A-A of FIG. 10;

FIG. 12 is a state diagram before pressing a separating apparatus using a first elastic restoring member;

FIG. 13 is a state diagram after pressing a separating apparatus employing a first resilient return member;

FIG. 14 is a schematic view of a separation device employing a second resilient return member;

FIG. 15 is a schematic view of a separation device employing a third resilient return member;

FIG. 16 is a snap-fit connection of the first and second connectors;

fig. 17 is a trip connection diagram of the first plug and the second plug.

Detailed Description

Examples: the utility model provides a plug connector separator 300, includes first plug connector 400 and second plug connector 500, first plug connector 400 and second plug connector 500 can the electric connection, be equipped with first buckle on the first plug connector 400 lateral wall, be equipped with the second buckle on the second plug connector 500 lateral wall, first buckle and second buckle can be along with the first plug connector 400 and the simultaneously lock connection of second plug connector 500 grafting, still be equipped with separator 300, separator 300 includes tripping and shifting arm 310 and elastic reset piece, establishes when first plug connector 400 and second plug connector are pegged graft, and first plug connector slip direction is the place ahead, and when first plug connector and second plug connector were separated, first plug connector slip direction was the rear, tripping and shifting arm 310 can be followed the installation of direction slip settlement distance on first plug connector 400 lateral wall, and tripping and shifting arm 310 slides to the assigned position and make it and first buckle trip, and elastic reset piece provides the elastic reset force that makes it break away from the second buckle to slide backward for tripping and shifting arm 310.

The plug and the socket all include the metal parts in insulator body and the insulator body, after plug and socket mutually opposite plug, corresponding metal parts also mutually opposite plug and form the point contact, and then form electric connection, after plug and socket mutually opposite plug, the first buckle of socket and the second buckle lock of plug are connected, plug and socket can't separate, after the operation separator 300, separator 300 makes first buckle and second buckle release, can pull out the plug from the socket this moment, through setting up first buckle and second buckle on plug and socket, can keep stable grafting state when plug and socket are pegged graft, avoid receiving external force etc. and make plug and socket upper metal part break away from, lead to the circuit disconnection, avoid appearing the bad condition emergence of contact, also need pull out the plug from the socket, only need operate separator 300 can trip first buckle and second buckle down, pull out the plug smoothly, convenient operation, buckle connection structure on plug and the socket can be a set of, also can be multiunit, corresponding separator 300 can be according to the actual design, can be a plurality of.

The protruding limit wall 440 on the side wall of the first plug connector 400), the limit wall 440 is formed with a strip-shaped guide groove 410 extending along the front-back direction, the separating device 300 further comprises a guide connecting wall 350, one end of the guide connecting wall 350 is fixedly connected with the trip poking arm 310, the other end of the guide connecting wall 350 is connected with the elastic resetting piece, the direction perpendicular to the front-back direction and parallel to the side wall of the first plug connector 400 is set as the left-right direction, the side wall of the guide connecting wall 350 is fixedly provided with a guide post 330 extending along the left-right direction, and the guide post 330 on the guide connecting wall 350 can be slidably inserted into the strip-shaped guide groove 410 on the limit wall 440. When the trip poking arm 310 of the separating device 300 slides forwards and backwards, the guide post 330 on the guide connecting wall 350 slides along the strip-shaped guide groove 410 on the limit wall 440 on the side wall of the first plug connector 400, so that the sliding distance of the trip poking arm 310 is limited while the guide is realized, the second buckle structure on the second plug connector 500 is prevented from being damaged due to overlarge sliding distance, and the separating device 300 and the first plug connector 400 cannot be separated, so that the separating device 300 plays a role in positioning.

The direction perpendicular to the front-back direction and the left-right direction is set as the up-down direction, the elongated guiding slot 410 on the limiting wall 440 is an inclined slot extending from the back-up direction to the front-down direction, the elastic restoring member of the separating device 300 is an elastic sheet integrally formed on the guiding connecting wall 350, the elastic deformation end of the elastic sheet is in close contact with the side wall of the first plug connector 400, and the elastic sheet is stressed to generate elastic deformation in the up-down direction. Through setting the rectangular guide slot 410 on the limit wall 440 to the slope structure, through pressing the elastic deformation that makes the elastic piece on it take place in the upper and lower direction of separator 300, and then make the trip on the separator 300 dial arm 310 slide forward and realize the stirring to the second buckle, stop pressing the back, the elastic piece automatic re-setting realizes separator 300 automatic re-setting again, and simple structure, convenient operation, in addition, the elastic re-setting piece also can follow the spring or the elastic piece of front and back direction elastic deformation.

The two guide connecting walls 350 are arranged at intervals in parallel, a pressing connecting wall 380 is fixedly arranged between the two guide connecting walls 350, the pressing connecting wall 380 and the two guide connecting walls 350 together form a U-shaped structure, the tripping pulling arm 310 is fixedly arranged at the front end of the pressing connecting wall 380, the elastic sheet is an arc elastic cantilever structure 320 arranged at the rear end of the pressing connecting wall 380 or an arc elastic sheet structure 360 arranged right below the two guide connecting walls 350 or a first elastic cantilever structure 370 arranged at the front lower part of the guide connecting wall 350 and having a set included angle with the front lower part of the guide connecting wall 350, the limiting walls 440 on the side wall of the first plug connector 400 are two arranged at intervals in parallel, the U-shaped structure formed by the pressing connecting wall 380 and the guide connecting walls 350 is sleeved outside the two limiting walls 440, and the elastic sheet is inserted between the two limiting walls 440.

The pressing connection wall 380 and the two guiding connection walls 350 are integrally formed into a U-shaped structure, the U-shaped structure is sleeved outside the two limiting walls 440, when the separating device 300 slides, front and rear guiding and upper and lower limiting are formed by the limiting walls 440 and the U-shaped structure again, meanwhile, the surface of the pressing connection wall 380 forms a pressing operation part, patterns are optimally arranged on the surface of the pressing operation part, the pressing operation is convenient, slipping phenomenon is prevented during the pressing operation, when the pressing connection wall 380 is pressed, the elastic sheet deforms to enable the separating device 300 to slide, when the elastic sheet is an arc-shaped elastic cantilever structure 320 arranged at the rear end of the pressing connection wall 380, one end of the arc-shaped elastic cantilever structure 320, which is far away from the pressing connection wall 380, forms a free end of the cantilever structure, the free end of the elastic sheet structure is tightly abutted to the side wall surface of the first plug connector 400 through a convex arc surface, and the pressing connection wall 380 is pressed down to enable the arc-shaped elastic cantilever structure 320 to elastically deform in the up and down directions; when the elastic sheet is an arc-shaped elastic sheet structure 360 arranged right below the two guide connecting walls 350, two ends of the arc-shaped elastic sheet are connected with the guide connecting walls 350, the convex cambered surface of the arc-shaped elastic sheet contacts with the side wall of the first plug connector 400, and the pressing connecting wall 380 is pressed down to elastically deform the arc-shaped elastic sheet in the up-down and front-back directions; when the elastic sheet is an elastic cantilever structure 370 disposed below and in front of the guide connecting wall 350 and having a set angle with the elastic cantilever structure, the elastic cantilever structure 370 is flush with the side wall of the first connector 400, the guide connecting wall 350 is in an inclined extending state, and the pressing connecting wall 380 is pressed down to deform the first elastic cantilever structure 370 with the root as a fulcrum, so that the guide connecting wall 350 moves downward.

The limiting wall 440 is further provided with a limiting open slot structure 450, the rear end of the pressing connecting wall 380 can be inserted into the limiting open slot structure 450 on the limiting wall 440, and the rear end of the pressing connecting wall 380 is stopped on the bottom surface of the limiting open slot structure 450. The opening slot on the limiting wall 440 is preferably a V-shaped opening slot with an opening inclined toward the front, and when the separating device 300 slides under pressure, the rear end of the pressing connecting wall 380 is inserted into the limiting opening slot structure 450 of the limiting wall 440, and the limiting opening slot structure 450 limits and guides the separating device.

The pressing connection wall 380 is an arc structure with a distance between the middle and the side wall of the first connector 400 greater than a distance between the two ends and the first connector 400, and a convex arc structure is formed on the limiting wall 440 and the opposite position of the pressing connection wall 380. This structure appearance is pleasing to the eye, presses connecting wall 380 and spacing wall 440 through the cambered surface contact, can not take place the card and put, can also set up the hollow out construction just right with spacing wall 440 highest point position on pressing connecting wall 380 intermediate position for press connecting wall 380 back and dodge with spacing wall 440 intermediate highest point, effectively reduce separator 300 up-down direction's size.

The limiting wall 440 on the first connector 400 is further provided with a limiting groove 420 with an opening direction facing the direction of the second connector 500, one end of the trip poking arm 310 of the separating device 300, which is opposite to the direction of the second connector 500, is further provided with a limiting rib 340, and the limiting rib 340 can be slidably inserted into the limiting groove 420. When the separating device 300 slides back and forth on the first plug connector 400, the limit rib 340 and the limit groove 420 are matched and inserted to play a role in guiding and limiting, and meanwhile, the separating device 300 is connected with the first plug connector 400 to play a reinforcing effect.

The end of the limiting rib 340 forms a tip structure with gradually reduced size, and an arc convex hull structure is formed on the side wall of the limiting rib 340 facing the side wall direction of the first plug connector 400. This structure guarantees that spacing muscle 340 can be fast, accurate the inserting when inserting spacing inslot 420, avoids taking place to interfere with spacing inslot 420 upper end lateral wall, guarantees simultaneously spacing muscle 340 and spacing inslot 420 lateral wall in close contact, avoids taking place to rock from top to bottom.

The first buckle is a barb-shaped hook structure 430 on the side wall of the first plug connector 400, the second buckle comprises a second elastic cantilever structure 520 positioned on the side wall of the second plug connector 500 and a hook hole 510 positioned on the second elastic cantilever structure 520, the second elastic cantilever structure 520 can be elastically covered on the outer side of the side wall of the first plug connector 400, and the barb-shaped hook structure 430 on the side wall of the first plug connector 400 can be clamped in the hook hole 510 on the second elastic cantilever structure 520. The hook hole 510 can be hung on the barb-shaped hook structure 430 to prevent the first plug connector 400 and the second plug connector 500 from being separated, and further achieve buckling connection between the first plug connector 400 and the second plug connector 500, and besides the buckling connection mode of the barb-shaped hook structure 430 and the hook hole 510, the first buckle and the second buckle can also adopt the magnetic force attraction buckling connection mode or the mode of inserting the groove and the elastic pin when the magnetic element approaches to each other.

The second elastic cantilever structure 520 end on the second plug connector 500 lateral wall is equipped with the direction of keeping away from first plug connector 400 lateral wall direction slope extension and sticks up limit 530, the tripping and shifting arm 310 end forms the triangle-shaped of thickness taper and sticks up the first plug lateral wall surface towards first plug connector 400 lateral wall one side surface and personally submits the flat structure of subsideing in first plug lateral wall surface, the triangle-shaped is sticks up the first structure and can hold in the direction of second elastic cantilever structure 520 end on the second plug connector 500 lateral wall sticks up limit 530 and the triangle-shaped clearance between the second plug connector 500 lateral wall.

When the first plug connector 400 and the second plug connector 500 are normally plugged, the triangular tilting head structure at the end part of the tripping and poking arm 310 is just contained in the triangular gap between the guiding tilting edge 530 at the end part of the elastic cantilever structure 370 on the side wall of the second plug connector 500 and the side wall of the second plug connector 500 in a gap, when the tripping and poking arm 310 slides forwards, the triangular tilting head slides forwards, gradually jacks up the second elastic cantilever structure 520 on the side wall of the second plug connector 500 upwards, so that the second buckle and the first buckle are tripped, and the structure can ensure that the second buckle can be smoothly and quickly separated from the first buckle when the separating device 300 is operated, and the situation of separation failure caused by error in the sliding direction of the tripping and poking arm 310 can not occur.

Claims (10)

1. The utility model provides a plug connector separator, includes first plug connector (400) and second plug connector (500), first plug connector and second plug connector can electric connection link to each other, be equipped with first buckle on the first plug connector lateral wall, be equipped with the second buckle on the second plug connector lateral wall, first buckle and second buckle can be connected with the lock in the time of first plug connector and second plug connector grafting, its characterized in that: still be equipped with separator (300), separator includes trip poking arm (310) and elasticity reset piece, establishes when first plug-in components and second plug-in components are pegged graft, and first plug-in components slip direction is the place ahead, and when first plug-in components and second plug-in components separate, first plug-in components slip direction is the rear, the trip poking arm can be followed the installation of the slip setting distance of fore-and-aft direction on first plug-in components lateral wall, and the trip poking arm slides to the assigned position and can stir the second buckle and make it and first buckle trip, and elasticity reset piece provides the elastic reset force that makes it break away from the second buckle poking position for the trip poking arm to slide backward.

2. The plug connector separating device according to claim 1, wherein: protruding spacing wall (440) on the first plug connector lateral wall, be formed with on the spacing wall along rectangular shape guide way (410) that the fore-and-aft direction extends, separator still includes direction connecting wall (350), direction connecting wall one end and tripping toggle arm fixed connection, the direction connecting wall other end links to each other with the elasticity reset piece, establishes and just the direction of parallel first plug connector lateral wall is left and right directions with the fore-and-aft direction is perpendicular, fixedly on the lateral wall of direction connecting wall be equipped with along left and right directions extending guide post (330), the guide post on the direction connecting wall can be gliding insert locate in the rectangular shape guide way on the spacing wall.

3. The plug connector separating device according to claim 2, wherein: the direction perpendicular to the front-back direction and the left-right direction is the up-down direction, the strip-shaped guide groove on the limiting wall is an inclined groove extending from the back upper direction to the front lower direction, the elastic resetting piece of the separating device is an elastic piece integrally formed on the guide connecting wall, the elastic deformation end of the elastic piece is tightly contacted with the side wall of the first plug connector, and the elastic piece is stressed to generate elastic deformation in the up-down direction.

4. A plug connector separating device according to claim 3, wherein: the two guide connecting walls are arranged at intervals in parallel, a pressing connecting wall (380) is fixedly arranged between the two guide connecting walls, the pressing connecting wall and the two guide connecting walls form a U-shaped structure together, the tripping toggle arm is fixedly arranged at the front end of the pressing connecting wall, the elastic sheet is an arc elastic cantilever structure (320) arranged at the rear end of the pressing connecting wall or an arc elastic sheet structure (360) arranged right below the two guide connecting walls or a first elastic cantilever structure (370) arranged below the front lower part of the guide connecting wall and provided with a set included angle with the front lower part of the guide connecting wall, the limiting walls on the side wall of the first plug-in connector are arranged at intervals in parallel, the U-shaped structure formed by the pressing connecting wall and the guide connecting wall is sleeved outside the two limiting walls, and the elastic sheet is inserted between the two limiting walls.

5. A plug connector separating device according to claim 3, wherein: the limiting wall is also provided with a limiting open slot structure (450), the rear end of the pressing connecting wall can be inserted into the limiting open slot structure on the limiting wall, and the rear end of the pressing connecting wall is stopped on the bottom surface of the limiting open slot structure.

6. The plug connector separating device according to claim 4, wherein: the pressing connecting wall is of an arc-shaped structure, the distance between the middle part of the pressing connecting wall and the side wall of the first plug connector is greater than the distance between the two ends of the pressing connecting wall and the first plug connector, and the limiting wall and the pressing connecting wall are opposite to each other to form a convex arc-shaped structure.

7. The plug connector separating device according to claim 2 or 4, characterized in that: the limiting wall on the first plug connector is also provided with a limiting groove (420) with an opening direction facing the direction of the second plug connector, one end of the tripping and poking arm of the separating device, which is opposite to the direction of the second plug connector, is also provided with a limiting rib (340), and the limiting rib can be slidably inserted into the limiting groove.

8. The plug connector separating device according to claim 7, wherein: the end part of the limiting rib forms a pointed structure with gradually reduced size, and an arc convex hull structure is formed on the side wall of the limiting rib facing the side wall direction of the first plug connector.

9. The plug connector separating device according to claim 1, wherein: the first buckle is barb-shaped clamping hook structures (430) on the side wall of the first plug connector, the second buckle comprises second elastic cantilever structures (520) located on the side wall of the second plug connector and clamping hook holes (510) located on the elastic cantilever structures, the elastic cantilever structures can be elastically covered on the outer side of the side wall of the first plug connector, and the barb-shaped clamping hook structures on the side wall of the first plug connector can be clamped in the clamping hook holes on the second elastic cantilever structures.

10. The plug connector separating device according to claim 9, wherein: the second elastic cantilever structure end on the second plug side wall is provided with a guide raised edge (530) which extends obliquely towards the direction away from the first plug side wall, the tripping shifting arm end forms a triangular raised head structure with gradually reduced thickness, the triangular raised head structure faces the side surface of the first plug side wall and is a flat structure flatly attached to the surface of the first plug side wall, and the triangular raised head structure can be accommodated in a triangular gap between the guide raised edge of the second elastic cantilever structure end on the second plug side wall and the second plug side wall.

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