CN101394051A

CN101394051A - Adaptor for plug and socket

Info

Publication number: CN101394051A
Application number: CNA2008101800634A
Authority: CN
Inventors: 李维峰; 杨根林
Original assignee: SHENZHEN PEGO MOULD CO Ltd
Current assignee: SHENZHEN PEGO MOULD CO Ltd
Priority date: 2008-11-21
Filing date: 2008-11-21
Publication date: 2009-03-25
Anticipated expiration: 2028-11-21
Also published as: CN100568637C; WO2010057399A1

Abstract

The invention discloses a plug and socket adapter, which is provided with a plug part used as power input and a socket part used as power output. The plug part is provided with four movable plugs of different standards, which are distributed in the adapter in the cross direction; each plug is provided with an upper fixed position and a lower fixed position; when the conductive inserted pins of the plugs move out of the adapter to enter an input state, conducting strips on the plugs and a connection conductor are in reliable contact with the conductive inserted pins by larger elastic force, so as to realize electrical connection; and when the conductive inserted pins do not move out of the adapter, the conducting strips of the plugs and the connection conductor are in a separation state of no electrical connection. The plugs are mutually restricted to move through two sliding rods at the inner part thereof, so as to ensure that more than one plug cannot move to extend simultaneously; an output jack of the adapter can be inserted into the plugs of different standards, so as to realize switch connection between the electric appliance plug of different standards and power sockets, thereby solving the matching problem of the electric appliance plug of different standards and the power sockets.

Description

A kind of adaptor for plug and socket

Technical field

The present invention relates to a kind of plug and socket of power source adapter.

Background technology

Existing international electrical standard is inconsistent, the appliance plug of most of countries and regions and supply socket all can not realize unified standard, make the electrical appliance of a country just can't use because plug and socket can not mate to the another one country like this.Needs along with the interchange development of international commerce and trade culture etc., many family expenses or portable electronics the product use of different regions internationally are more and more general, with one be convenient for carrying, safe and reliable, plug and socket of power source adapter that applicability is wide, just can solve the matching problem of the plug and socket of various criterion.

There are some that the attaching plug of adaption function is arranged on the existing market, the plug that multiple standards is arranged that they have, can insert in the supply socket of various criterion, they itself have also designed the socket mouth, adapting to appliance plug inserts, such plug, conveniently between the plug and socket of various criterion, change, make that user's appliance plug can be adaptive with different sockets, have a kind of like this multifunctional power plug kind of function more, but structure function is not very perfect, have plenty of by the plugs and sockets of monomer and form external member, occasional combination in use is not easy to operate and carry like this, though what also have is that functor is combined, but fail safe is lower, complicated operation, or it is less to load, be not suitable for big electrical equipment and use, the actual scope of application is limited to.

The attaching plug that also has a kind of perfect relatively travelling to use on the existing market more, as reference CN02815377.4, it has the plug connector of at least two various criterions, the supporter of each plug connector has an operative pin that is arranged on the contact pilotage next door, operative pin can move in the slit of shell together with the contact pilotage of plug connector through shell, and have on the supporter of these plug connectors on the circle hole sleeve guide pillar that portion erects in the enclosure, can from the grafting body, shift out and move into, another movable fuse and three brake bodies in the grafting body, they and plug connector acting in conjunction, by operation to fuse, can make all plug connectors in active position and inoperative position braking, brake body is set in the arc-shaped rail of outer casing inner wall, when any one plug connector shifts out, because its operative pin mobile pushed the brake body locking shift motion of other plug operative pins is braked in the grafting body other plug connector, can not be removed to active position.

Summary of the invention

Technical problem to be solved by this invention is to solve the appliance plug of multiple various criterion and the problem that the coupling of the conversion between the supply socket connects.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of adaptor for plug and socket, comprise as the plug portion of power supply input and the socket part of exporting as power supply, the two is connected to an overall structure, described socket part comprises upper casing, described upper casing is the uncovered box-shaped shell in rectangular bottom, cross section, and the end face of this housing is provided with the interface that adapts to Anglicism, American, Australia formula, European plan and Chinese style reference power supply plug; Described plug portion comprises that lower casing, Anglicism plug, American plug, Australia formula plug, European plan plug, slide bar move restriction mechanism and four slide keys, and described lower casing is the open top box-shaped shell suitable with upper casing; Anglicism plug, American plug, Australia formula plug, European plan plug, above-mentioned plug is cross respectively and is slidingly arranged in the lower casing; Slide bar moves restriction mechanism, form by the longitudinal and transverse slide bar that the across overlapping is provided with, the overlapping portion of described longitudinal and transverse slide bar has the groove that holds mutually respectively, two outer faces of the two are respectively equipped with acclivitous slope, be fixed with reseting spring leaf on the longitudinal and transverse slide bar respectively, the two ends of this reseting spring leaf are fixed with lower casing respectively, and slide bar moves restriction mechanism when being in meta, and the relative inner face of above-mentioned four plugs is positioned at the top of the slope on the longitudinal and transverse slide bar; Four slide keys, the sidewall that is inserted on Anglicism, American, Australia formula and the European plan plug respectively and passes upper and lower casing moves up and down, the slide bar that the conduction latch of the corresponding Anglicism of the drive that moves up and down of described slide key, American, Australia formula or European plan plug stretches out the lower surface of lower casing and promotes this plug below simultaneously moves the disengaging meta, and this plug was electrically connected with socket when any plug stretched out the lower casing lower surface fully.

In the such scheme, also comprise the European plan plug body that is slidingly arranged in the lower casing, the European plan plug is slidingly arranged in the European plan plug body, have longitudinal fluting on the lateral wall of European plan plug body, the bottom of this longitudinal fluting has horizontal draw-in groove, the bottom surface of lower casing has and is used for the outwardly directed opening of European plan plug body, the bottom surface of European plan plug body has the socket that the conduction latch for the European plan plug stretches out, and the slide key is slidingly arranged in the longitudinal slot on the European plan plug body and laterally is stuck in the horizontal draw-in groove when the slide key slides to the bottom of longitudinal fluting.

The rear wall of described European plan plug body is provided with two vertical bar holes, be respectively equipped with elastic hook in this bar hole, have the catching groove that aligns with bar hole on the bottom surface of plug portion lower casing, respectively described elastic hook is ejected when the European plan plug is protruding and fastener in the catching groove of lower casing.

Described Anglicism plug, American plug, Australia formula plug and European plan plug are made up of two conduction latches, two conductive contact blade and plug stake bodies that are electrically connected with it respectively, and conduction latch and conductive contact blade are embedded in the left and right sides that the interior and conductive contact blade of plug stake body lays respectively at the plug stake body respectively.

Be respectively equipped with the groove of the slide key that holds Anglicism plug, American plug and Australia formula plug on the sidewall of upper and lower shell, have the slit of penetrating this sidewall in the groove, the upper and lower side in this slit has horizontal draw-in groove, and the slide key places in this slit and moves up and down along the slit and be stuck in the horizontal draw-in groove when sliding to up and down two ends.

The bottom of described slide key is provided with spring, and the longitudinal axis of described plug is provided with groove, the slide key be inserted in this groove and spring be resisted against between the bottom surface of slide key and groove.

The socket of described socket below is provided with emergency exit, this emergency exit and socket opposite position be wedge shape and afterbody be provided with upper casing against elastic arm, this emergency exit is flexibly sealed socket and expose this socket when plug is slotting.

Inside of the present invention has the movably plug of four various criterions, these plugs move by inner two slide bar mutual restriction, making plug can not have simultaneously more than moving more than one stretches out, the output plughole of this adapter can insert the plug of various criterion, the appliance plug and the conversion between the supply socket that realize multiple various criterion connect, and have solved the appliance plug of various criterion and the matching problem of supply socket.

Description of drawings

Fig. 1 is the perspective view of plug and socket of power source adapter of the present invention;

Fig. 2 is the upward view of Fig. 1;

Fig. 3 is the decomposition texture schematic diagram of plug and socket of power source adapter of the present invention;

Fig. 4 is four kinds of plug construction schematic diagrames of plug and socket of power source adapter of the present invention;

Fig. 5 moves restriction mechanism structure schematic diagram for the slide bar of plug and socket of power source adapter of the present invention;

Fig. 6 moves the position view of restriction mechanism in lower casing for each plug and the slide bar of plug and socket of power source adapter of the present invention;

Fig. 7 is that plug and socket of power source adapters of the present invention is in Australia formula plug pattern diagram;

Fig. 8 is that plug and socket of power source adapters of the present invention is in Anglicism plug pattern diagram;

Fig. 9 is that plug and socket of power source adapters of the present invention is in American plug pattern diagram;

Figure 10 is that plug and socket of power source adapters of the present invention is in European plan plug pattern diagram;

Figure 11 is the schematic diagram of plug and socket of power source adapter Anglicism plug of the present invention slide bar position when stretching out;

Figure 12 is the schematic diagram of plug and socket of power source adapter European plan plug body of the present invention slide bar position when stretching out;

Figure 13 is the schematic diagram of the American plug of plug and socket of power source adapter of the present invention slide bar position when stretching out;

Figure 14 is the schematic diagram of plug and socket of power source adapter of the present invention Australia formula plug slide bar position when stretching out;

Figure 15 a, 15b, 15c are plug and socket of power source adapter of the present invention Australia formula plug moving process schematic diagrames;

Figure 16 a, 16b are the change in location figure of plug and socket of power source adapter European plan plug of the present invention plug body when stretching out;

Figure 17 a, 17b are the service position schematic diagrames of plug and socket of power source adapter jack part emergency exit of the present invention.

Embodiment

Below the present invention is made detailed explanation.

The invention provides a kind of plug and socket of power source adapter that has the removable plug of multiple different size standard and a Universal socket is arranged, versatility is widely compared with prior art arranged, more convenient operation is reliable, its structure is more compact, will have the plug portion of input function and the socket part of output function and be integrated into one.

This plug and socket of power source adapter has the shell of being made up of last lower casing and is arranged on the plug of four various criterions of enclosure, these plugs and adapter lower casing are formed the plug importation, and these plugs are the cross direction and are distributed in four interior positions of adapter, can move up and down in the enclosure, each plug has two fixed positions in adapter, the slippage slit that their slide key passes on the shell can move up and down and can be fixed on when sliding to the upper and lower side in slippage slit in the draw-in groove of motion gap, above-mentioned slide key is flexible to be placed on the inwall of the concave hole of plug rack surface and shell, when having the plug conducting latch to shift out adapters in input state, conducting strip on the plug can rely on the spring contact on the bonding conductor to contact reliably with it with bigger elastic force, realize being electrically connected, when plug conducting latch retract adapter, the conducting strip of plug is in the released state that is not electrically connected with bonding conductor.

Followingly the present invention is made detailed explanation with reference to accompanying drawing.

Fig. 3 is the decomposition texture schematic diagram of each parts of the present invention, there is shown all parts, the shell of adapter is made up of upper casing 1 and lower casing 2, be built-in with the

plug

6,7,8,9 of four various criterions, two

slide bars

13,14, four

operation keys

11a, 11b, 11c, 11d, two bonding conductors 19,20 and other building block.

Fig. 1 is a stereogram of the present invention, upper part is the socket part of adapter among the figure, the panel 101 of upper casing 1 is provided with interface 31, ground connection interface 32, have longitudinal fluting 34a on the sidewall of upper casing 1 and

lower casing

2,34d, longitudinal fluting 34a, have the longitudinal slot 35a that connects sidewall on the bottom surface of 34d, 35d, this longitudinal slot 35a, the upper and lower side of 35d has horizontal draw-in

groove

33a, 33d,

slide key

11a, 11d is slidingly arranged in longitudinal slot 35a, in the 35d, slit 35a longitudinally, 35d moves up and down, and is sliding onto longitudinal slot 35a, can be stuck in horizontal draw-in groove 33a during the upper and lower side of 35d, realize the location in the 33d.The sidewall relative with slide key 11d is provided with same structure, not expression among the figure.The jack of this socket part can insert the appliance plug of various criterion, brace in the jack is designed to insert the various criterion plug and can realizes reliable contacting structure, and brace adopts has the phosphorus bronze sheet of bigger elastic force to make the plug of brace and insertion contact well.

Fig. 2 is the upward view of Fig. 1, upper part is the plug portion of adapter among the figure, on the panel 201 of lower casing 2 Australia formula is arranged, Anglicism, the extending port 41 of American plug conducting latch, 42,43 and be used for the breach 44 that European plug body is stretched out, be provided with two catching grooves 211 in the inboard of breach 44, location when being used for Europe and inserting a formula body 12 and stretch out, European plan plug body 12 is provided with and is used for the outlet 125 that the plug conducting latch stretches out, on panel, also has a groove 43 that is used to collect Anglicism plug ground connection pin 22, also be useful on the fuse box 45 of placing fuse 23, movable fuse lid 24 is can take off from the panel of lower casing 2 with the convenient fuse of changing at any time.Plug portion is with the socket part clamping or be spirally connected into an integral body.

Fig. 4 is the plug construction schematic diagram of four various criterions, European plan plug 6, American plug 7, Anglicism plug 8 and Australia formula plug 9.The

plug conducting latch

63,73,83,93 of each plug be electrically connected with

conductive contact blade

64,74,84,94 respectively and respectively with

plug stake body

61,71,81,91 one injection moldeds, conductive contact blade lays respectively at the left and right sides of plug stake body.

Plug stake body

61,71,81,91 upper edge longitudinal axis are respectively equipped with the

square hole

62,72,82,92 suitable with

operation keys

11a, 11b, 11c and 11d, are used to insert the aforesaid operations key.

Fig. 5 slide bar moves the restriction structural scheme of mechanism, it comprises two

slide bars

13,14 and two shell fragments 15, shell fragment 15 is separately fixed at slide bar 13, an end of 14 and the two ends of shell fragment 15 are by the lower house fixed limit, two

slide bars

13,14 vertically overlap up and down, the overlapping position has a notch 131,141, all there is jut 132 vertically upward at the two ends of two slide bars, 142, this jut all has a slope 133,143, when any one slide bar moves, its notch displacement will stop the shift motion of another slide bar, and the effect of shell fragment 15 is to make mobile slide bar return to meta when the plug that moves is regained.

Fig. 6 is that each plug and slide bar move the position view of restriction mechanism in lower casing, wherein Australia formula plug 7 and American plug were listed in the both sides of lower casing 2 inside in 9 minutes, Anglicism plug 8 and European plan plug body were listed in the two ends of lower casing inside in 12 minutes,

slide bar

13,14 mechanisms of playing restrictive function are arranged on middle, when slide bar moves restriction mechanism when being in meta, the medial surface of Australia formula plug 7, American plug 9, Anglicism plug 8 and European plan plug body 12 lays respectively at the top of slope 133,143.

Fig. 7 is the schematic diagram that the present invention is in Australia formula plug pattern, operation keys 11a leaves from the draw-in groove of upper casing 1 along gap 34a in outer casing groove 34a and moves in the draw-in groove of lower casing 2 among the figure, the plug conducting latch 73 of Australia formula plug 7 stretches out from the extending port 42 of lower casing panel 201 simultaneously, and adapter just can be inserted into and realize in the formula socket of Australia being electrically connected like this.

Fig. 8 is the schematic diagram that the present invention is in Anglicism plug pattern, operation keys 11b leaves from the draw-in groove of upper casing 1 along gap 34b in outer casing groove 34b and moves in the draw-in groove of lower casing 2 among the figure, the plug conducting latch 83 of Anglicism plug 8 stretches out from the extending port 41 of lower casing panel 201 simultaneously, and Anglicism ground connection pin 22 also erects from groove 43, and adapter just can be inserted into realization electrical connection in the Anglicism socket like this.

Fig. 9 is the schematic diagram that the present invention is in American plug pattern, operation keys 11d leaves from the draw-in groove of upper casing 1 along gap 34d in outer casing groove 34d and moves in the draw-in groove of lower casing 2 among the figure, the plug conducting latch 93 of American plug 9 stretches out from the outlet 40 of lower casing panel 201 simultaneously, and adapter just can be inserted into and realize in the American socket being electrically connected like this.

Figure 10 is the schematic diagram that the present invention is in European plan plug pattern, the operation of this pattern is different from above three kinds, on can seeing in the drawings, lower casing do not form one with other three grooves that face is the same, but form a breach 202 at lower casing, the effect of this breach is to provide the operating space for shifting out plug body 12, at first the slotting formula body 12 in Europe stretches out from the breach 44 of lower casing, depressing and promote operation keys 11c then moves in the draw-in groove of lower end along the gap from the groove 121 of plug body, the plug conducting latch 63 of European plan plug 6 stretches out from the outlet 125 of plug body simultaneously, and adapter just can be inserted into and realize in the European plan socket being electrically connected like this.The European plan plug is because there is a plug body, and the plug conducting latch can stretch out in plug body again, therefore the effective length of European plan plug is longer, when making European plug in the shift-in adapter, be unlikely to increase the overall volume of adapter, so the flexible structure that shifts out of the European plug secondary of ingenious design.

Figure 11 is Anglicism plug 8 of the present invention slide bar position schematic diagram when stretching out, when Anglicism plug 8 moves among the figure, slide bar 13 is squeezed by the plug stake body and pushes European plug body 12 directions to and move, the moving direction of arrow D1 indication slide bar 13, its front end has restricted the shift motion of European plug body 12, and slide bar 14 also is stuck in because of moving of slide bar 13 in the groove that slide bar 13 is and is moved by restriction.

Figure 12 is European plan plug body 12 of the present invention slide bar position schematic diagram when stretching out, slide bar 13 was squeezed by the projection on the plug body 123 (referring to Fig. 6) and pushes Anglicism plug 8 directions to and move when European plug body 12 was stretched out shell among the figure, the moving direction of arrow D2 indication slide bar 13, its front end has restricted the shift motion of Anglicism plug 8, and slide bar 14 is also moved by restriction because of moving of slide bar 13.

Figure 13 is the American plug 7 of the present invention slide bar position schematic diagram when stretching out, when American plug 7 moves among the figure, slide bar 14 is squeezed by the plug support and pushes Australia formula plug direction to and move, the moving direction of arrow D3 indication slide bar 14, its front end has restricted the shift motion of Australia formula plug 9, and slide bar 13 is also moved by restriction because of moving of slide bar 14.

Figure 14 is Australia of the present invention formula plug 9 slide bar position schematic diagram when stretching out, when Australia formula plug 9 stretches out among the figure, slide bar 14 is squeezed by the plug support and pushes American plug 7 directions to and move, moving oppositely of arrow D4 indication slide bar 14, its front end has restricted the shift motion of American plug 7, and slide bar 13 is also moved by restriction because of moving of slide bar 14.

Figure 15 a, 15b, 15c are plug and socket of power source adapter of the present invention Australia formula plug moving process schematic diagrames, in operating process, operation keys 11d is in the diverse location among the 35d of shell gap, in Figure 15 a, when Australia formula plug 9 was not moved, operation keys 11d was stuck among the upper casing draw-in groove 133d; In Figure 15 b, Australia formula plug 9 is when moving midway, and operation keys 11d is in the 35d of upper and lower shell slit; In Figure 15 c, when Australia formula plug 9 moved to 35d bottom, slit, operation keys 11d was stuck among the lower casing draw-in groove 233d, thereby shifting out fully of plug conducting latch 93 makes adapters in Australia formula plug pattern.

The moving process that need to prove American plug 7 in the adapter, Anglicism plug 8 is the same with the moving process of Australia formula plug 9.And European plan plug mobile comprises two actions, and at first plug body 12 shifts out from the breach 44 of lower casing 2, mobile then plug 6, and at this moment operation keys is slippage in the groove 122 of plug body and gap, and is stuck in the draw-in groove of plug body.

Figure 16 a, 16b are the change in location figure of plug and socket of power source adapter European plan plug of the present invention plug body when stretching out, and in Figure 16 a, when the plugs 6 in the European plan plug body 12 did not stretch out, the elasticity on the plug body 12 buckled for 121 this moments in the raw; In Figure 16 b, plug 6 in the plug body 12 stretches out socket, this moment, the elasticity of plug body buckled 121 by plug support 61 crowded releasing, and making elasticity buckle fastener can make adapter form European plan plug mode state in the catching groove 211 of adapter lower casing 2 (referring to Fig. 2).

Figure 17 a, 17b are the service position schematic diagrames of plug and socket of power source adapter jack part emergency exit of the present invention.The main part design of socket part emergency exit has a slope 38, and a pair of elastic arm 39 arranged, only demonstrate an elastic arm among the figure, another elastic arm is symmetrical arranged with it, the plug that inserts can slide along slope 38 and squeeze pushes compression elastic arm 39 simultaneously, forces emergency exit to open socket 31, as when not having plug to insert shown in Figure 17 a, elastic arm 39 in the raw, emergency exit is closed the socket mouth; Shown in Figure 17 b when plug inserts, elastic arm 39 is in compressive state, emergency exit is opened the socket mouth.

The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.

Claims

1, a kind of adaptor for plug and socket comprises that the two removably connects in aggregates as the plug portion of power supply input and the socket part of exporting as power supply, it is characterized in that,

Described socket part comprises,

Upper casing is the uncovered box-shaped shell in rectangular bottom, cross section, and the end face of this housing is provided with the interface that adapts to Anglicism, American, Australia formula, European plan and Chinese style reference power supply plug;

Described plug portion comprises,

Lower casing, for the suitable open top box-shaped shell of upper casing;

Anglicism plug, American plug, Australia formula plug, European plan plug, above-mentioned plug is cross respectively and is slidingly arranged in the lower casing;

Slide bar moves restriction mechanism, form by the longitudinal and transverse slide bar that the across overlapping is provided with, the overlapping portion of described longitudinal and transverse slide bar has the groove that holds mutually respectively, two outer faces of the two are respectively equipped with acclivitous slope, be fixed with reseting spring leaf on the longitudinal and transverse slide bar respectively, the two ends of this reseting spring leaf are fixed with lower casing respectively, and slide bar moves restriction mechanism when being in meta, and the relative inner face of above-mentioned four plugs is positioned at the top of the slope on the longitudinal and transverse slide bar;

Four slide keys, the sidewall that is inserted on Anglicism, American, Australia formula and the European plan plug respectively and passes upper and lower casing moves up and down, the slide bar that the conduction latch of the corresponding Anglicism of the drive that moves up and down of described slide key, American, Australia formula or European plan plug stretches out the lower surface of lower casing and promotes this plug below simultaneously moves the disengaging meta, and this plug was electrically connected with socket when any plug stretched out the lower casing lower surface fully.

2, adaptor for plug and socket as claimed in claim 1, it is characterized in that also comprising the European plan plug body that is slidingly arranged in the lower casing, the European plan plug is slidingly arranged in the European plan plug body, have longitudinal fluting on the lateral wall of European plan plug body, the bottom of this longitudinal fluting has horizontal draw-in groove, the bottom surface of lower casing has and is used for the outwardly directed opening of European plan plug body, the bottom surface of European plan plug body has the socket that the conduction latch for the European plan plug stretches out, and the slide key is slidingly arranged in the longitudinal slot on the European plan plug body and laterally is stuck in the horizontal draw-in groove when the slide key slides to the bottom of longitudinal fluting.

3, adaptor for plug and socket as claimed in claim 2, the rear wall that it is characterized in that described European plan plug body is provided with two vertical bar holes, be respectively equipped with elastic hook in this bar hole, have the catching groove that aligns with bar hole on the bottom surface of plug portion lower casing, respectively described elastic hook is ejected when the European plan plug is protruding and fastener in the catching groove of lower casing.

4, as claim 1,2 or 3 described adaptor for plug and socket, it is characterized in that described Anglicism plug, American plug, Australia formula plug and European plan plug be made up of two conduction latches, two conductive contact blade and plug stake bodies that are electrically connected with it respectively, conduction latch and conductive contact blade are embedded in the left and right sides that the interior and conductive contact blade of plug stake body lays respectively at the plug stake body respectively.

5, adaptor for plug and socket as claimed in claim 4, it is characterized in that being respectively equipped with on the sidewall of upper and lower shell the groove of the slide key that holds Anglicism plug, American plug and Australia formula plug, have the slit of penetrating this sidewall in the groove, the upper and lower side in this slit has horizontal draw-in groove, and the slide key places in this slit and moves up and down along the slit and be stuck in the horizontal draw-in groove when sliding to up and down two ends.

6, adaptor for plug and socket as claimed in claim 5, the bottom that it is characterized in that described slide key is provided with spring, the longitudinal axis of described plug is provided with groove, the slide key be inserted in this groove and spring be resisted against between the bottom surface of slide key and groove.

7, adaptor for plug and socket as claimed in claim 6, the socket below that it is characterized in that described socket is provided with emergency exit, this emergency exit and socket opposite position be wedge shape and afterbody be provided with upper casing against elastic arm, this emergency exit is flexibly sealed socket and expose this socket when plug is inserted.