CN210245907U - Conversion socket - Google Patents

Abstract

The utility model provides a conversion socket, which relates to the field of electrical sockets and aims to solve the technical problem that the conversion socket in the prior art cannot simultaneously meet the use requirements of a plurality of countries, and comprises a first conversion socket, a second conversion socket and/or a third conversion socket, wherein the first conversion socket is a German standard or European standard socket, the second conversion socket is a American standard socket, and the third conversion socket is an English standard or Australian standard socket; the first conversion socket comprises a base, a first boss, a second boss and a first pin, wherein the first boss and the second boss are fixedly connected with the base, the first pin is suitable for German and European standards, and the second boss can be converted between an extending state and a contracting state relative to the first boss through a contracting mechanism. The utility model provides a conversion socket can realize the function of moral standard plug or european standard plug, American standard plug, english standard plug or australian standard plug, and simple structure, and the volume is less, convenient to carry.

Description

Conversion socket

Technical Field

The utility model relates to an electrical socket field, concretely relates to conversion socket.

Background

Along with the development of global economy, political, economic trade and cultural communication of each country are more and more frequent, and the number of people who make transnational travel is continuously increased. The standards of the sockets established may not be consistent from country to country or from region to region due to the different development processes. At present, a plurality of standards exist for electric pins in the world, including Chinese standard, American standard, European standard, British standard and the like, and the pins used in each country are different in shape, for example, the pins of the Chinese standard are characterized by three or two flat heads, and the pins of the American standard are characterized by one circle and two flat heads. When an imported electric appliance is purchased, the plug or the socket attached to the electric appliance is often found not to be matched with the existing socket or plug; or when people need frequently make a round trip to a plurality of countries, the plug of the electrical product that carries can't match with local supply socket, just need carry the conversion socket that is applicable to each country respectively, leads to the quantity of the conversion socket that needs to carry more, and the conversion socket that carries is comparatively in disorder, brings inconvenience for work and daily. In addition, the countries in europe have a relatively close relationship between themselves, and germany has a different socket standard from those in other countries in europe, so that people can carry different sockets to bring inconvenience to people going out across europe and countries.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a conversion socket to solve the technical problem that the conversion socket among the prior art can't satisfy a plurality of national user demands simultaneously, the utility model discloses a conversion socket simple structure, convenient to use can satisfy a plurality of national user needs.

The utility model provides a conversion socket, including first conversion socket, second conversion socket and/or third conversion socket, the second conversion socket with the one end of first conversion socket can be dismantled and be connected, the third conversion socket with the other end of first conversion socket can be dismantled and be connected, first conversion socket is the socket that accords with the German standard or the European standard, the second conversion socket is the socket that accords with the American standard, the third conversion socket is the socket that accords with the English standard or the Australian standard; the first conversion socket comprises a base, a first boss fixedly connected with the base, a second boss connected with the first boss through a contraction mechanism, and a first pin which is arranged on the second boss and is suitable for German standard or European standard, wherein the second boss can be in an extending state or a contracting state relative to the first boss through the contraction mechanism.

As a preferred aspect of the present invention, the contracting mechanism includes an elastic member disposed inside the first boss, the elastic member is engaged with the second boss, an opening is disposed on the first boss, a clamping block integrally connected to the elastic member is disposed in the opening, and the clamping block can make the second boss be in an extending state or a contracting state relative to the first boss.

As a preferred scheme of the utility model be provided with first spacing groove and second spacing groove on the second boss lateral wall, first spacing groove for the second spacing groove is located the end that stretches out of second boss, so that the second boss is in respectively when stretching out or shrink state the elastic component is located respectively the second spacing groove with first spacing inslot.

As a preferred aspect of the present invention, the elastic member includes a leg and a latch, the leg is fixed to the first boss side wall, the latch is provided to the opposite side of the leg, and the elastic member passes through the latch and the second boss block.

As a preferable embodiment of the present invention, a connecting block is provided on the first pins, a spring is provided between the two connecting blocks, and a distance between the two first pins is adjusted by the expansion and contraction of the spring to be adapted to a socket in korea or south africa.

As a preferred scheme of the utility model, the connecting block includes connector and dog, be equipped with the through-hole on the connector and pass through the through-hole with first participating in and being connected, the connector with form the spout between the dog, two the mutual block of dog of connecting block extremely in the spout, the both ends of spring are connected to two the inboard of dog, through the flexible distance between two first participating in that can adjust of spring.

As an optimal scheme of the utility model be provided with first socket hole on the base of first conversion socket, first socket hole includes five socket holes of national standard and english standard socket hole, five socket holes of national standard and english standard socket hole cross arrangement.

As a preferred embodiment of the present invention, a second pin is disposed on the second conversion socket, the second pin is a foldable plug, and a slot for receiving the second pin is disposed at a corresponding position of the second conversion socket, so that the second pin can be opened or folded; and a second socket hole is formed in the side surface of the second conversion socket, and a third socket hole is formed in the bottom surface of the second conversion socket.

As a preferred scheme of the utility model be provided with the third on the third conversion socket and participate in, the third is participated in including english standard plug and australian standards plug, be connected with the first push button and the second push button on english standard plug and the australian standards plug respectively, the first push button and the second push button can be adjusted respectively the flexible of english standard plug and australian standards plug.

As a preferable aspect of the present invention, a fourth socket hole is provided in the third switching socket, and the first switching socket is connected to the third switching socket through the first pin and the fourth socket hole in an inserting manner.

As an optimal scheme the inside slide bar, socket shell fragment and the shell fragment of participating in that is provided with of third conversion socket, the socket shell fragment sets up in zero line socket shell fragment and live wire socket shell fragment of fourth socket hole lower extreme including corresponding respectively, the side of zero line socket shell fragment and live wire socket shell fragment is provided with zero line slide bar and live wire slide bar respectively, the zero line slide bar with the lower extreme of live wire slide bar passes through the wire with live wire socket shell fragment and zero line socket shell fragment respectively and is connected, the lower extreme outside of zero line slide bar and live wire slide bar is provided with the live wire respectively and participates in shell fragment and zero line and participates in the shell fragment, the live wire is participated in the shell fragment and the zero line is participated in the live wire and is connected with the live wire and the zero line that.

Compared with the prior art, the utility model discloses there is following positive effect:

1. the utility model provides a conversion socket, through setting up first conversion socket, second conversion socket and third conversion socket, make this conversion socket can realize the service function of German standard plug, European standard plug, American standard plug, English standard plug and Australian standard plug; and through set up first boss and second boss on first conversion socket, make the second boss can be for first boss change between stretching out state and shrink state through shrink mechanism, set up the diameter of first participating in simultaneously to be adapted to the form of German standard and European standard, make the utility model discloses a conversion socket can regard as German standard and European standard plug to use simultaneously. The first conversion socket functions as a euro standard plug when the second boss is in an extended state with respect to the first boss, and functions as a german standard plug when the second boss is in a retracted state with respect to the first boss.

2. The utility model provides a conversion socket through at the inside elastic component that sets up of first boss, is provided with first spacing groove and second spacing groove on second boss lateral wall, makes the elastic component and first spacing groove block fashionably, and the second boss shrink is in the first boss, this conversion socket uses as the German standard plug, the elastic component with during the spacing groove block of second, the second boss stretch out in first boss, this conversion socket uses as the European standard plug. The conversion socket is suitable for the countries such as Korea and south Africa by arranging the connecting blocks on the first pins and arranging the springs between the two connecting blocks so as to change the distance between the two first pins through the extension and contraction of the springs; the second plug of the second conversion socket is inserted into the first jack of the first conversion socket, the first plug pin of the first conversion socket is inserted into the fourth socket hole of the third conversion socket, splicing of three different sockets can be achieved, occupied size of the socket is reduced, and the socket is convenient to carry.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view illustrating a state in which a second boss of a first conversion socket of a conversion socket of the present invention is extended from the first boss;

fig. 2 is a schematic structural view of a state in which the second boss of the first conversion socket of the present invention is located in the first boss;

fig. 3 is a side view of a first switching jack of the present invention;

fig. 4 is a schematic diagram of an internal structure of a first switching socket of the present invention;

fig. 5 is a schematic view of the internal structure of the conversion socket of the present invention in a state that the second boss protrudes from the first boss;

fig. 6 is a schematic view of the internal structure of the conversion socket of the present invention in a state where the second boss is located inside the first boss;

fig. 7 is a schematic view of a first switching socket of the present invention with the spring in a compressed state;

fig. 8 is a schematic view of a first switching socket of the present invention with the spring in an extended state;

fig. 9 is a bottom view of a base of a first switching jack of the present invention;

fig. 10 is a schematic structural view of a second switching socket of the present invention;

fig. 11 is a schematic structural view illustrating a third conversion socket of the present invention in a state of an english standard plug;

fig. 12 is a schematic structural view illustrating a state of an australian standard plug of a third switching receptacle of the present invention;

fig. 13 is a side view of a third switching jack of the present invention;

fig. 14 is a schematic diagram of an internal structure of a third switching socket of the present invention;

fig. 15 is a schematic structural view of the switching jack according to the present invention in three separated states;

fig. 16 is a schematic structural diagram of the connection state of the switching jack according to the present invention.

In the figure: 1-a first conversion socket; 11-a base; 111-national standard five-hole socket hole; 112-British standard socket hole; 12-a first boss; 121-opening; 122 — a first groove; 123-convex strips; 13-a second boss; 131-a first limiting groove; 132-a second restraint slot; 14-a first pin; 15-an elastic member; 151-a fixture block; 152-a leg; 153-latch; 16-connecting blocks; 161-a connector; 162-a stop; 163-a chute; 17-a spring; 2-a second switching jack; 21-a second pin; 22-slot position; 23-a second socket hole; 24-a USB charging port; 25-a third socket hole; 3-a third switching jack; 31-english standard plug; 32-a first push button; 33-Australian standard plug; 34-a second push button; 35-inserting positioning grooves; 351-buckling; 352-second groove; 36-fourth socket hole; 371-zero line slide bar; 3711-neutral line bump; 3712-neutral wire connecting spring plate; 372-live line sliding rod; 3721-fire line bulge; 3722-a live wire connecting spring plate; 381-zero line socket shell fragment; 382-a live wire socket shell fragment; 391-zero line pin spring; 392-live pin spring.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1-16, the utility model provides a pair of conversion socket, including first conversion socket 1, second conversion socket 2 and/or third conversion socket 3, the one end of first conversion socket 1 can be dismantled with second conversion socket 2 and be connected, and the other end of first conversion socket 1 can be dismantled with third conversion socket 3 and be connected. The first switching jack 1 is a jack conforming to the german or european standard, the second switching jack 2 is a jack conforming to the american standard, and the third switching jack 3 is a jack conforming to the english or australian standard. The first conversion socket 1 includes a base 11, a first boss 12 fixedly connected to the base 11, a second boss 13 connected to the first boss 12 through a retracting mechanism, and a first pin 14 disposed on the second boss 13 and adapted to the german standard or the euro standard, wherein the second boss 13 can be in an extended state or a retracted state relative to the first boss 12 through the retracting mechanism. The utility model discloses a conversion socket is through being provided with first conversion socket 1, second conversion socket 2 and/or third conversion socket 3, makes the conversion socket can be adapted to German standard, European standard socket, American standard socket, english standard and Australian standard socket. The second projection 13 of the first conversion socket 1 can be in an extended state or a retracted state with respect to the first projection 12 to enable the first conversion socket 1 to be used as a german or euro standard plug. The insulation plastic of the German standard plug connecting pin is circular, and the outer diameter of the circle is 36.5 mm. The insulation plastic of the European standard plug connecting pin is similar to a rectangle, the size of the plastic is 13x35mm, and the oblique width is 26 mm. The utility model discloses a first boss 12 of first conversion socket 1 is circular to correspond to the circular insulating plastic of German standard, and second boss 13 is the type rectangle and corresponds to the insulating plastic of the type rectangle of European standard, and the long limit of second boss 13 is less than the diameter of first boss 12. The conversion socket is adapted to the euro standard when the second projection 13 is in the extended state relative to the first projection 12 and to the german standard when the second projection 13 is in the retracted state relative to the first projection 12. The diameter of the pin of the german standard plug is 4.8mm, the diameter of the pin of the european standard plug is 4.0mm, and the german standard socket is adapted to the plug that the pin diameter is 4.0mm and 4.8mm simultaneously, so set up the diameter of first pin 14 to 4.0mm, the top of first pin 14 sets up to the button head, so that the utility model discloses a first conversion socket 1 can be adapted to the german standard and the european standard plug.

As an alternative embodiment, as shown in fig. 3 to 6, the contracting mechanism includes an elastic member 15 provided inside the first boss 12, and the elastic member 15 is engaged with the second boss 13. An opening 121 is formed in the first boss 12, a latch 151 integrally connected with the elastic member 15 is disposed in the opening 121, and the latch 151 enables the second boss 13 to be in an extended state or a contracted state with respect to the first boss 12. When the latch block 151 is shifted towards the outer side of the first boss 12, the elastic element 15 is separated from the second boss 13, and at this time, the first pin 14 can be pulled to adjust the state of the second boss 13 relative to the first boss 12, and when the latch block 151 is not pushed, the elastic element 15 is clamped with the second boss 13 under the elastic force action of the elastic element 15, so that the position of the second boss 13 relative to the first boss 12 is fixed.

As an alternative embodiment, as shown in fig. 5 to 6, a first limiting groove 131 and a second limiting groove 132 are provided on the sidewall of the second boss 13. The first limiting groove 131 is located at the extending end of the second boss 13 opposite to the second limiting groove 132, so that the elastic member 15 is located in the second limiting groove 132 and the first limiting groove 131 when the second boss 13 is in the extending or contracting state, respectively. The engagement structure of the elastic member 15 with the second stopper groove 132 and the first stopper groove 131 makes the structure of the contraction mechanism simple, and the state of the second boss 13 relative to the first boss 12 is stable.

As an alternative embodiment, as shown in fig. 4, the elastic member 15 includes a leg 152 and a latch 153, the leg 152 is fixed on the side wall of the first boss 12, the latch 153 is disposed on the opposite side of the leg 152, and the leg 152 and the latch 153 are of an integral structure. The two legs 152 and the two latches 153 are respectively provided, so that the legs 152 and the latches 153 on both sides of the elastic member 15 form a symmetrical structure. The latch 151 is disposed on a transition between the leg 152 and the latch 153. The elastic member 15 is made of plastic material, and the legs 152 on both sides form an arc structure to provide elastic force for the elastic member 15. The elastic member 15 is engaged with the second boss 13 by the latch 153. The use of the elastic member 15 reduces the use of a spring while having a good elastic force.

As an alternative embodiment, as shown in fig. 7 to 8, a connecting block 16 is provided on the first pin 14, a spring 17 is provided between the two connecting blocks 16, and the distance between the two first pins 14 is adjusted by the expansion and contraction of the spring 17. The utility model discloses a first 14 diameters of participating in of conversion socket are 4.0mm, and the shell fragment structure in the socket of countries such as korea and little south africa is only used for participating in the diameter and is 4.8mm and 5.0 mm's plug, and the diameter is easy not hard up in inserting the socket of these countries for 4.0 mm's plug, can drop even, thereby leads to contact failure to damage electrical apparatus easily. Therefore, the distance between the two first pins 14 can be adjusted through the contraction of the spring 17, so that when the first pin 14 of the conversion socket of the utility model is used for the sockets in the countries such as korea and south africa, the first pin 14 can adapt to the sockets with different sizes through the action of the spring 17, and the contact spring in the socket is electrified.

As an alternative embodiment, as shown in fig. 7 to 8, the connecting block 16 includes a connecting head 161 and a stopper 162, the connecting head 161 is provided with a through hole and connected to the first pin 14 through the through hole, the connecting head 161 extends to one side to connect with the stopper 162, the connecting head 161 and the stopper 162 are integrated, so that a sliding slot is formed between the connecting head 161 and the stopper 162, the stoppers 162 of two connecting blocks 16 are mutually clamped into the sliding slot of another connecting block 16, two ends of the spring 17 are connected to the inner sides of the two stoppers 162, and the distance between the two first pins 14 can be adjusted through the expansion and contraction of the spring 17. When the spring 17 is in a compressed state, the distance between the two first pins 14 increases, and the two first pins 14 tend to approach each other under the action of the spring 17, so that the European standard socket is adapted. When the spring 17 is in the extended state, the distance between the two first pins 14 is reduced, thereby being adapted to the socket in korea and countries such as south africa.

As an alternative embodiment, as shown in fig. 9, first socket holes are provided on the base 11 of the first conversion socket 1, and the first socket holes include a national standard five-hole socket hole 111 and a english standard socket hole 112, and the national standard five-hole socket hole 111 and the english standard socket hole 112 are arranged in a crossing manner.

As an alternative embodiment, as shown in fig. 10, a second pin 21 is provided on the second conversion socket 2, the second pin 21 is a foldable plug, and a slot 22 for receiving the second pin 21 is provided at a corresponding position of the second conversion socket 2, so that the second pin 21 can be opened or folded; a second socket hole 23 is provided on a side surface of the second switching socket 2, and a third socket hole 25 is provided on a bottom surface of the second switching socket 2. Preferably, the second socket hole 23 is a two-pole socket hole, and the third socket hole 25 is an international semicircular socket hole. The arrangement positions of the socket holes are made more practical by respectively arranging the socket holes on the side surfaces and the bottom surface, and the situation that two jacks are arranged on the same surface and interfere with each other when used is avoided, so that the design volume of the second conversion socket 2 is reduced. Preferably, a USB charging port 24 is further provided on a side surface of the second switching socket 2, and has a USB charging function, so that the USB charging socket is more adaptable.

As an alternative embodiment, as shown in fig. 11 to 12, a third pin is provided on the third conversion socket 3, the third pin includes a english standard plug 31 and an australian standard plug 33, the first push button 32 and the second push button 34 are respectively connected to the english standard plug 31 and the australian standard plug 33, and the first push button 32 and the second push button 34 can respectively adjust the extension and contraction of the english standard plug 31 and the australian standard plug 33. The pin of the english standard plug 31 is connected to one connecting plate and connected with a first push button 32, the first push button 32 protrudes out of the outer surface of the shell through a stroke slot, the pin of the australian standard plug 33 is connected to the other connecting plate and connected with a second push button 34, the second push button 34 protrudes out of the outer surface of the shell through the other stroke slot, and the two connecting plates are arranged in a staggered mode. When the first push button 32 is pushed upward, the english standard plug 31 protrudes from the upper surface of the third switching jack 3, and the function of the english standard plug 31 is realized. When the second push button 34 is pushed upwards, the australian standard plug 33 protrudes out of the upper surface of the third conversion socket 3, so that the function of the australian standard plug 33 is realized.

As an alternative embodiment, as shown in fig. 13 and 15, a plug positioning groove 35 is provided on the third conversion socket 3, a fourth socket hole 36 is provided in the positioning groove 35, and the fourth socket hole 36 is a german standard socket hole. The periphery of grafting constant head tank 35 is provided with buckle 351 and second recess 352, is provided with first recess 122 and sand grip 123 on the lateral wall of first boss 12, and first recess 122 and sand grip 123 are blocked joint with buckle 351 and second recess 352 mutually respectively, and first participate in 14 and the grafting of fourth socket hole 36 to make first conversion socket 1 and third conversion socket 3 joint, can improve the stability and the compactness of assembly.

As an alternative embodiment, as shown in fig. 14, a sliding rod, a socket spring and a pin spring are arranged inside the third switching socket 3, the socket spring includes a neutral socket spring 381 and a live socket spring 382 which are respectively arranged at the lower end of the fourth socket hole 36, and the sides of the neutral socket spring 381 and the live socket spring 382 are respectively provided with a neutral sliding rod 371 and a live sliding rod 372. The upper ends of the neutral line sliding rod 371 and the live line sliding rod 372 are respectively provided with a streamline neutral line bulge 3711 and a live line bulge 2721, and the lower ends are respectively provided with a neutral line connection spring 3712 and a live line connection spring 3722. The neutral protrusion 3711 and the live protrusion 2721 protrude from the upper sides of the neutral socket elastic piece 381 and the live socket elastic piece 382 respectively, and the neutral connection spring 3712 and the live connection spring 3722 are connected with the live socket elastic piece 382 and the neutral socket elastic piece 381 respectively through wires. The live wire pin elastic sheet 392 and the neutral wire pin elastic sheet 391 are respectively arranged on the outer sides of the neutral wire connecting spring 3712 and the live wire connecting elastic sheet 3722, gaps exist between the neutral wire connecting spring 3712 and the live wire pin elastic sheet 392 and between the live wire connecting elastic sheet 3722 and the neutral wire pin elastic sheet 391, and the live wire pin elastic sheet 392 and the neutral wire pin elastic sheet 391 are respectively connected with the live wire and the neutral wire of the third pin. When the neutral pin of the first pin 14 is inserted into the fourth socket hole 36, the neutral protrusion 3711 contacting the upper end of the neutral sliding rod 371 tilts inward due to the lever action, and the neutral connection spring 3712 contacting the lower end of the neutral sliding rod 371 tilts outward to contact the upper end of the live pin spring 392, thereby connecting to the live pin of the third pin. If the live pin of the first pin 14 is not inserted, the live sliding rod 372 cannot be connected with the neutral pin elastic sheet 391, so that a connecting line cannot be formed, the socket cannot conduct electricity, and the socket can be powered on for use only when the two pins are inserted into the fourth socket hole 36 at the same time, so that the socket has an electric shock protection effect, and the socket is safer to use.

The circuit parts, the conductive copper sheets and the like in the first switching socket 1, the second switching socket 2 and the third switching socket 3 are conventional technical means, and will not be described herein too much.

The utility model discloses a conversion socket realizes moral standard plug or european standard plug respectively through setting up first conversion socket 1, second conversion socket 2 and third conversion socket 3, and the American standard plug, the function of english standard plug or australian standard plug is provided with multiple jack simultaneously on the conversion socket, can be adapted to the user demand of a plurality of countries. As shown in fig. 14 to 15, the switching socket of the present invention can realize the splicing of three different sockets by inserting the second plug 21 of the second switching socket 2 into the first insertion hole 111 of the first switching socket 1 and inserting the first pin 14 of the first switching socket 1 into the fourth socket hole 36 of the third switching socket 3. The three conversion sockets can be used independently or can be spliced to be used in a plurality of countries around the world. According to the trip needs, when only going to a country, can carry a conversion socket alone, when going to a plurality of countries, can select to carry arbitrary two kinds or three kinds of conversion sockets. The plug of each conversion socket has the functions of folding and splicing, so that the size is reduced, and the conversion socket is convenient to carry.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can make several modifications and improvements without departing from the inventive concept, and all shall be covered by the protection scope of the present invention.

Claims (10)

1. A conversion socket is characterized by comprising a first conversion socket (1), a second conversion socket (2) and/or a third conversion socket (3), wherein the second conversion socket (2) is detachably connected with one end of the first conversion socket (1), the third conversion socket (3) is detachably connected with the other end of the first conversion socket (1), the first conversion socket (1) is a socket conforming to German standard or European standard, the second conversion socket (2) is a socket conforming to American standard, and the third conversion socket (3) is a socket conforming to English standard or Australian standard; the first conversion socket (1) comprises a base (11), a first boss (12) fixedly connected with the base (11), a second boss (13) connected with the first boss (12) through a contraction mechanism, and a first pin (14) which is arranged on the second boss (13) and is suitable for German standard or European standard, wherein the second boss (13) can be in an extending state or a contracting state relative to the first boss (12) through the contraction mechanism.

2. A switching jack according to claim 1, wherein the retracting mechanism comprises an elastic member (15) disposed inside the first boss (12), the elastic member (15) is engaged with the second boss (13), the first boss (12) is provided with an opening (121), a latch (151) integrally connected to the elastic member (15) is disposed in the opening (121), and the latch (151) enables the second boss (13) to be in an extended state or a retracted state with respect to the first boss (12).

3. A switching jack according to claim 2, wherein a first limiting groove (131) and a second limiting groove (132) are formed in the side wall of the second boss (13), and the first limiting groove (131) is located at the protruding end of the second boss (13) relative to the second limiting groove (132), so that the elastic member (15) is located in the second limiting groove (132) and the first limiting groove (131) when the second boss (13) is in the protruding or retracted state, respectively.

4. A switching jack according to claim 3, wherein the resilient member (15) comprises a leg (152) and a latch (153), the leg (152) being fixed to the side wall of the first boss (12), the latch (153) being disposed on the opposite side of the leg (152), the resilient member (15) being engaged with the second boss (13) via the latch (153).

5. A switching jack according to claim 1, wherein connecting pieces (16) are provided on the first pins (14), springs (17) are provided between the two connecting pieces (16), and the distance between the two first pins (14) is adjusted by the expansion and contraction of the springs (17) to be adapted to the jacks of korea or the south african countries.

6. The switching socket according to claim 5, wherein the connecting block (16) comprises a connecting head (161) and a stopper (162), a through hole is formed in the connecting head (161) and is connected with the first pins (14) through the through hole, a sliding slot (163) is formed between the connecting head (161) and the stopper (162), the stoppers (162) of the two connecting blocks (16) are mutually clamped in the sliding slot (163), two ends of the spring (17) are connected to the inner sides of the two stoppers (162), and the distance between the two first pins (14) can be adjusted through the expansion and contraction of the spring (17).

7. A switching jack according to claim 1, characterized in that a second pin (21) is provided on the second switching jack (2), the second pin (21) being a foldable plug, and a slot (22) for receiving the second pin (21) is provided at a corresponding position of the second switching jack (2) to enable the second pin (21) to be opened or folded; a second socket hole (23) is formed in a side surface of the second switching socket (2), and a third socket hole (25) is formed in a bottom surface of the second switching socket (2).

8. The conversion socket according to claim 1, wherein a third pin is provided on the third conversion socket (3), the third pin comprises a british standard plug (31) and a australian standard plug (33), a first push button (32) and a second push button (34) are respectively connected to the british standard plug (31) and the australian standard plug (33), and the first push button (32) and the second push button (34) can respectively adjust the extension and retraction of the british standard plug (31) and the australian standard plug (33).

9. A switching jack according to claim 1, wherein a fourth jack hole (36) is provided in the third switching jack (3), and the first switching jack (1) is connected to the third switching jack (3) by plugging the first plug pin (14) into the fourth jack hole (36).

10. The switching socket according to claim 9, wherein a sliding rod, a socket spring plate and a pin spring plate are arranged inside the third switching socket (3), the socket spring plate comprises a zero line socket spring plate (381) and a live line socket spring plate (382) which are respectively arranged at the lower end of the fourth socket hole (36), the sides of the zero line socket spring plate (381) and the live line socket spring plate (382) are respectively provided with a zero line sliding rod (371) and a live line sliding rod (372), the lower ends of the zero line sliding rod (371) and the live line sliding rod (372) are respectively connected with the live line socket spring plate (382) and the zero line socket spring plate (381) through conducting wires, the outer sides of the lower ends of the zero line sliding rod (371) and the live line sliding rod (372) are respectively provided with a live line pin spring plate (392) and a zero line pin spring plate (391), and the live line pin spring plate (392) and the zero line pin spring plate (391) are respectively connected with the pin and the zero line of the third switching socket.

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