CN204992196U - Power supply conversion socket - Google Patents

Abstract

The utility model discloses a power conversion socket, which comprises a shell, an electric conduction device is arranged inside the shell, the shell includes a cylindrical body and a cover plate, the end surface of the cylindrical body is provided with a multipurpose socket hole, and the cover plate is provided with The plug group, the electrical conduction device includes a socket hole conductive component set corresponding to the multi-purpose socket hole and a first circuit board that is set corresponding to the plug group and can be electrically connected to the plug group, the socket hole conductive component is electrically connected to the first circuit board, and the plug group It includes three different plugs, which are the first plug, the second plug and the third plug. The second plug can be converted into two different standard plugs by rotating the angle of the pin piece. The three plugs are respectively arranged on the cover plate. On the three sides of the inner cavity, the first plug and the third plug are arranged opposite to each other, and two limit plates are arranged on the cover plate through which one plug can protrude from the housing, and the other two plugs cannot protrude from the housing. , the two limiting plates are arranged between the first plug and the third plug and are oppositely arranged.

Description

A power conversion socket

technical field

The utility model relates to the technical field of electrical appliances, in particular to a power conversion socket.

Background technique

Almost all electrical appliances use a power plug to cooperate with the socket to obtain power supply. Many countries and regions have power and socket standards with different structures, which leads to the fact that electrical appliances produced in a certain country or region cannot be used universally in this country or region because they do not meet the power plug and socket standards of another country or region, thus causing people a lot of trouble. caused a lot of trouble.

The solution to the above problems is to provide a conversion socket, which has socket holes and plugs of different standards, thereby realizing the conversion of plugs and sockets. For example, Chinese Patent No. 200420009384.5 discloses a combined power plug converter, which includes a split socket housing, various hole-shaped jacks arranged on the front panel of the housing, and plugs are arranged on the rear panel of the housing. Although the converter has a variety of jacks to be applicable to electrical appliances with different standard plugs, its plug structure is single, and the plug can only be applied to a standard power socket, which still cannot meet the needs of users.

Utility model content

The purpose of the utility model is to provide a power conversion socket to solve the above technical problems.

For this purpose, the utility model adopts the following technical solutions:

A power conversion socket, comprising a casing, the casing is provided with an electrical conduction device, the casing includes a cylindrical body with an open end and a cover plate that is fastened to the opening of the cylindrical body, the The end face of the cylindrical body is provided with a multi-purpose socket hole, the cover plate is provided with a plug group, and the electrical conduction device includes a socket hole conductive component corresponding to the multi-purpose socket hole and a socket hole conductive component corresponding to the plug group and can be connected with the plug group. The plug group is electrically connected to the first circuit board, and the socket hole conductive component is electrically connected to the first circuit board. The plug group includes three different plugs, which are respectively the first plug, the second plug and the third plug. Plug, wherein the second plug can be transformed into two plugs of different standards by rotating the angle of the pin piece, and the three plugs are respectively arranged on three sides of the inner cavity of the cover plate, the first plug and the second plug The three plugs are arranged opposite to each other, and the cover plate is also provided with two limit plates that can be displaced so that after one of the plugs protrudes out of the housing, the other two plugs cannot protrude out of the housing. The two limiting plates are disposed between the first plug and the third plug and are oppositely arranged, and the two limiting plates are rotatably connected to the cover plate through a connecting mechanism.

Preferably, the conductive component of the socket hole is detachably connected to the end surface of the cylindrical body in a clamping manner, and the first circuit board is detachably connected to the end surface of the cover plate in a clamping manner.

As a preferred technical solution, the two limiting plates are respectively a first limiting plate and a second limiting plate, and each of the limiting plates has a first end connected to the connecting mechanism and a At the second end opposite to the first end, the two limiting plates are arranged between the first plug and the third plug and are opposite to each other, and the first limiting plate is located on the second The limit plate is close to one side of the first plug, and the three plugs are all provided with limit rods for limiting their respective activities. When the first plug extends out of the housing, the first plug The limit rod of the stopper abuts against the first limit plate, and pushes both the first limit plate and the second limit plate to move towards the direction of the third plug, so as to block the first The plug and the second plug protrude from the housing, and when the second plug protrudes from the housing, the limiting rod of the second plug is inserted into the first end of the first limiting plate and between the first ends of the second limiting plate, and drive the first limiting plate and the second limiting plate to tilt towards the first plug and the third plug respectively, so as to Blocking the first plug and the third plug from protruding from the housing, when the third plug protrudes from the housing, the limit rod of the third plug is against the second limit board, and push the second limiting plate and the first limiting plate to move towards the direction of the first plug, so as to prevent the first plug and the second plug from protruding out of the shell body.

As a preferred technical solution, a side of the first limiting plate close to the second limiting plate is provided with a first slope on its first end, and the first slope is along the direction away from the cover plate. The direction is gradually inclined towards the first plug; the side of the second limiting plate close to the first limiting plate is provided with a second inclined surface corresponding to the first inclined surface, and the second inclined surface is along the direction away from the cover plate. direction, gradually tilting towards the third plug; the first slope and the second slope form a V-shaped groove, and when the second plug does not protrude from the housing, the limiting plate of the second plug is located at the V inside the groove.

By setting the first slope and the second slope on the first limiting plate and the second limiting plate respectively, and making the first slope and the second slope form a V-shaped groove, when the second plug is to protrude from the cover plate , the limit rod on the second plug can be quickly and accurately inserted between the first ends of the two limit plates under the guidance of the V-shaped groove, so that the first limit plate and the second limit plate respectively face Move in the direction of the first plug and the third plug, so that the first plug and the second plug cannot protrude from the cover plate, when the second plug does not protrude from the cover plate, the limit plate of the second plug is located in the V-shaped groove , without hindering the movement of the first limiting plate and the second limiting plate.

As a preferred technical solution, a third slope is provided on the side of the first limiting plate close to the first plug and at its second end, and the third slope is from a direction away from the cover plate, Gradually incline towards the second limit plate, when the first plug does not protrude from the cover plate, the limit rod of the first plug is located above the third slope, when the first plug protrudes downward , the third slope provides a guide for the precise displacement of the first limiting plate; the second limiting plate is close to the side of the third plug and is provided with a fourth slope on the second end thereof, the The fourth inclined plane gradually inclines toward the first limiting plate from the direction away from the cover plate. When the third plug does not protrude from the cover plate, the limiting rod of the third plug is located on the fourth inclined plane. above, when the third plug protrudes downward, the fourth slope provides a guide for the precise displacement of the second limiting plate.

As a preferred technical solution, the connecting mechanism includes two fixing plates located on both sides of the limiting plate and fixed on the cover plate, and the sides of the two fixing plates away from each other are arranged with The clamping rod connected to the cover plate, the limiting plate is connected to the two clamping rods through the connecting plate, the fixing plate and the clamping rod both pass through the first circuit board, the The connecting plate is provided with two clamping holes that can respectively insert the two clamping rods, and the limiting plate is provided corresponding to the connecting plate so that the limiting plate can be displaced by a certain distance relative to the connecting plate. hole.

As a preferred technical solution, the fixed plate has a third end connected to the cover plate and a fourth end opposite to the third end, and the fourth ends of the two fixed plates are provided to enable The two ends of the connecting plate are respectively inserted into the plate slots.

By setting the plate slots on the sixth ends of the two fixed rods, the two ends of the connecting plate can be inserted respectively, so that the force of the connecting plate on the two clamping rods can be reduced during the tilting process of the limiting plate. force. Therefore, the two clamping rods are not easily deformed.

As a preferred technical solution, it also includes a second circuit board equipped with a USB interface, the second circuit board is located in the housing, and the cover plate is arranged corresponding to the second circuit board so that the first Two circuit boards are inserted into the socket, the socket passes through the first circuit board, one end of the second circuit board is inserted into the socket and is electrically connected to the first circuit board, and the second circuit board is electrically connected to the first circuit board. The other end of the two circuit boards abuts against the end surface of the cylindrical body, so that the second circuit board is stabilized in the housing, and the side wall of the cylindrical body corresponds to the USB interface. A USB insertion hole that communicates with the USB interface.

As a preferred technical solution, the first circuit board is provided with two conductive columns that can electrically connect the first circuit board and the socket hole conductive component, and the two conductive columns are far away from the first circuit board. One end of a circuit board is inserted into the conductive component of the socket hole.

As a preferred technical solution, a plurality of guide posts that can guide when the first plug, the second plug, and the third plug expand and contract are also provided in the housing, and the cover plate Corresponding to each of the guide posts, a guide post fixing hole that allows one end of the guide post to be inserted is provided.

As a preferred technical solution, the pins corresponding to each of the plugs on the cover are provided with pin holes that allow the pins to pass through from the inside of the housing to the outside of the cover and slide therein. The side of the plug close to the cover is provided with a spring fastener for fastening the plug to the cover.

Preferably, on the side wall of the housing, corresponding to each of the spring fasteners of the plug, there is provided a chute allowing the spring fasteners to slide therein.

Compared with the prior art, the beneficial effects of the utility model are: the utility model has the following advantages:

The utility model has the following advantages:

1. It has a multi-purpose socket hole and a variety of standard plugs, which can be applied to the conversion between any plug and any socket hole;

2. When in use, only one kind of plug protrudes from the surface of the housing. On the one hand, it can avoid touching the electric socket and is safe to use. On the other hand, the plug can be shrunk in the housing when not in use, so it is small in size and convenient. carry;

3. The limiting device for limiting the activity of the plug of the utility model has a simple structure and low manufacturing cost.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of a power conversion socket described in an embodiment of the present invention.

Fig. 2 is an exploded view of a power conversion socket described in the embodiment of the present invention.

Fig. 3 is a schematic diagram of the installation of the cover plate, three plugs and two limiting plates described in the embodiment of the present invention.

Fig. 4 is another state view after the cover plate, three plugs and two limit plates described in the embodiment of the present invention are installed.

Fig. 5 is an exploded schematic diagram of the cover plate, two limiting plates and the connecting mechanism described in the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of the first plug described in the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of the second plug described in the embodiment of the present invention.

Fig. 8 is a schematic structural diagram of the third plug according to the embodiment of the present invention.

In the picture:

1. Cover plate; 101, pin hole; 102, slot piece; 103, guide column fixing hole;

2. The first plug; 3. The second plug; 4. The third plug;

51, the first limiting plate; 511, the first inclined plane; 512, the third inclined plane; 52, the second limiting plate; 521, the second inclined plane; 522, the fourth inclined plane; 53, the connecting mechanism; 531, the fixed plate; 532, connecting plate; 533, clamping rod; 54, square 54;

6. Limit rod; 7. Spring fastener;

8. The first circuit board; 81. The conductive column;

9. Cylindrical body; 91. Multipurpose socket hole;

11. The second circuit board; 111. USB interface;

12. Guide column; 13. Conductive component of socket hole; 14. Slide groove.

detailed description

The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

As shown in Figures 1 to 8, this embodiment discloses a power conversion socket, which includes a housing, an electrical conduction device is provided inside the housing, and the housing includes a cylindrical body 9 with an open end and a cylindrical body that is fastened to the The cover plate 1 on the opening of 9, the end face of the cylindrical body 9 is provided with a multi-purpose socket hole 91, the cover plate 1 is provided with a plug group, and the electrical conduction device includes a socket hole conductive assembly 13 corresponding to the multi-purpose socket hole and a corresponding plug group. The first circuit board 8 that can be electrically connected with the plug group, the socket hole conductive component 13 is electrically connected with the first circuit board 8, and the plug group includes three different plugs, which are respectively the first plug 2, the second plug 3 and The third plug 4, wherein the second plug 3 can be converted into two different standard plugs by rotating the angle of the pin piece, and the three plugs are respectively arranged on three sides of the inner cavity of the cover plate 1, the first plug 2 and the second plug The three plugs 4 are relatively arranged, and the cover plate 1 is also provided with two limit plates that can be displaced to make one plug stretch out of the housing, and the other two plugs cannot stretch out of the shell. The two limit plates are arranged at the second position The first plug 2 and the third plug 4 are located opposite each other, and the two limiting plates are rotatably connected to the cover plate 1 through the connecting mechanism 53 .

In this embodiment, the first plug 2, the second plug 3, and the third plug 4 are European plugs, Australian plugs, and British plugs respectively, wherein the second plug 3 can also be transformed into American plug.

Preferably, the socket hole conductive component 13 is detachably connected to the end surface of the cylindrical body 9 by snap-fitting, and the first circuit board 8 is detachably connected to the end face of the cover plate 1 by snap-fitting.

The two limiting plates are respectively a first limiting plate 51 and a second limiting plate 52, and each limiting plate has a first end connected to the connecting mechanism 53 and a second end opposite to the first end, the first The limiting plate 51 is located on the side of the second limiting plate 52 close to the first plug 2, and the three plugs are all provided with limiting rods 6 for limiting their respective activities. When the first plug 2 stretches out of the housing, the first The limit rod 6 of the plug 2 is against the first limit plate 51, and pushes the first limit plate 51 and the second limit plate 52 to move towards the direction of the third plug 4, so as to block the second plug 3 and The third plug 4 stretches out of the housing, and when the second plug 3 stretches out of the housing, the stop rod 6 of the second plug 3 is inserted into the first end of the first stop plate 51 and the first end of the second stop plate 52 . end, and drive the first stop plate 51 and the second stop plate 52 to move towards the first plug 2 and the third plug 4 respectively, so as to prevent the first plug 2 and the third plug 4 from protruding from the housing , when the third plug 4 protrudes from the casing, the stop rod 6 of the third plug 4 is against the second stop plate 52, and both the second stop plate 52 and the first stop plate 51 are pushed toward the first stop plate 51. The direction of the first plug 2 moves to block the second plug 3 and the first plug 2 from protruding out of the housing.

The side of the first limiting plate 51 close to the second limiting plate 52 and on its first end is provided with a first slope 511, the first slope 511 is gradually inclined towards the first plug 2 along the direction away from the cover plate 1; The side of the second limiting plate 52 near the first limiting plate 51 is provided with a second inclined surface 521 corresponding to the first inclined surface 511, and the second inclined surface 521 gradually inclines toward the third plug 4 along the direction away from the cover plate 1; the first inclined surface 511 and the second slope 521 form a V-shaped groove, and when the second plug 3 does not protrude from the casing, the limiting plate of the second plug 3 is located in the V-shaped groove.

By setting the first inclined surface 511 and the second inclined surface 521 on the first limiting plate 51 and the second limiting plate 52 respectively, and making the first inclined surface 511 and the second inclined surface 521 form a V-shaped groove, when the second When the plug 3 protrudes from the cover plate 1, the stop rod 6 on the second plug 3 can be quickly and accurately inserted between the first ends of the two stop plates under the guidance of the V-shaped groove, so that the first The limiting plate 51 and the second limiting plate 52 move towards the direction of the first plug 2 and the third plug 4 respectively, so that the first plug 2 and the third plug 4 cannot protrude from the cover plate 1, when the second plug 3 When the cover plate 1 is not extended, the limiting plate of the second plug 3 is located in the V-shaped groove, which does not hinder the movement of the first limiting plate and the second limiting plate.

The first limiting plate 51 is close to the first plug 2 and on its second end is provided with a third inclined surface 512. The third inclined surface 512 gradually inclines towards the second limiting plate 52 from the direction away from the cover plate 1. When a plug 2 does not protrude from the cover plate 1, the limiting rod 6 of the first plug 2 is located above the third inclined plane 512, and when the first plug protrudes downward, the third inclined plane 512 is the first limiting plate Precise displacement provides guidance; the second limiting plate 52 is close to the side of the third plug 4 and is located on its second end to provide a fourth slope 522, and the fourth slope 522 gradually moves toward the first limit from the direction away from the cover plate 1. The positioning plate 51 is inclined, and when the third plug 4 does not protrude from the cover plate 1, the stop bar 6 of the third plug 4 is located above the fourth inclined plane 522, and when the third plug protrudes downward, the fourth inclined plane 522 Provide guidance for the precise displacement of the second limiting plate.

The connecting mechanism 53 includes two fixing plates 531 located on both sides of the limiting plate and fixed on the cover plate 1, and the sides of the two fixing plates 531 away from each other are provided with snap-in rods 533 connected with the cover plate 1, and the limiting The board is connected with two clamping rods 533 through the connecting plate 532, the fixed plate 531 and the clamping rods 533 pass through the first circuit board 8, and the connecting plate 532 is provided with two clamping joints that can respectively insert the two clamping rods 533. The hole, the limiting plate corresponds to the connecting plate 532 and is provided with a square hole 54 that can make the limiting plate move a certain distance relative to the connecting plate 532 .

The fixing plate 531 has a third end connected to the cover plate 1 and a fourth end opposite to the third end. The fourth ends of the two fixing plates 531 are provided with slots for inserting the two ends of the connecting plate 532 respectively.

By setting plate-releasing slots on the sixth ends of the two fixed rods, the two ends of the connecting plate 532 can be inserted respectively, so that the force of the connecting plate 532 on the two clamping rods can be reduced during the displacement process of the limiting plate. Force on 533. Therefore, the two clamping rods 533 are not easily deformed.

The power conversion socket of the present utility model also includes a second circuit board 11 equipped with a USB interface 111. The second circuit board 11 is located in the housing. Slot piece 102, the slot piece 102 passes through the first circuit board 8, one end of the second circuit board 11 is inserted in the slot piece 102 and is electrically connected with the first circuit board 8, and the other end of the second circuit board 11 abuts On the end surface of the cylindrical body 9 to make the second circuit board 11 firmly inside the casing, a USB insertion hole communicating with the USB interface 111 is provided on the side wall of the cylindrical body 9 corresponding to the USB interface 111 .

The first circuit board 8 is provided with two conductive columns 81 that can electrically connect the first circuit board 8 and the socket hole conductive component 13 , and the ends of the two conductive columns 81 away from the first circuit board 8 are inserted into the socket hole conductive component 13 .

A plurality of guide posts 12 that can guide when the first plug 2, the second plug 3 and the third plug 4 are telescopic are also arranged in the housing, and one end of the guide post 12 is set corresponding to each guide post 12 on the cover plate 1 to make the guide post 12 Insert the guide post into the fixing hole 103 .

The pins corresponding to each plug on the cover plate 1 are provided with a pin hole 101 that allows the pins to pass through from the inside of the housing to the outside of the cover plate 1 and slide therein, and each plug is provided on the side close to the cover plate 1 to fasten the plug The spring fastener 7 on the cover plate 1.

Preferably, the side wall of the housing is provided with a slide groove 14 corresponding to each spring fastener 7 of the plug so that the spring fastener 7 can slide therein.

working principle:

In a normal state, when the plug is not pushed out, the stop rods 6 of the first plug 2 and the third plug 4 are respectively located on the third slope 512 of the first stop plate 51 and the fourth slope 522 of the second limit plate 52. Above, the limiting rod 6 of the second plug 3 is located in the V-shaped groove. When the first plug 2 protrudes from the cover body 1, the stop rod 6 of the first plug 2 pushes the first stop plate 51 to move closer to the second stop plate 52, when the first stop plate 51 and the second stop After the plates 52 close together, the first limiting plate 51 pushes the second limiting plate 52 to move towards the direction of the third plug 4 under the driving of the limiting rod 6 of the first plug 2, so that the second plug 3 and the third plug The plug 4 cannot move because its position limiting rod 6 is limited by the moving first limiting plate 51 and the second limiting plate 52, so that the second plug 3 and the third plug 4 cannot protrude from the cover body 1; When the second plug 3 protrudes from the cover body 1, the limiting rod 6 of the second plug 3 is inserted into the first end of the first limiting rod 6 and the first end of the second limiting rod 6 along the V-shaped groove. , and push the first stop plate 51 and the second stop plate 52 to move towards the direction of the first plug 2 and the third plug 4 respectively, so that the first plug 2 and the third plug 4 are 6 The moved first limiting plate 51 and second limiting plate 52 limit the position and cannot be moved, so that the first plug 2 and the third plug 4 cannot extend out of the cover body 1; when the third plug 4 extends When the cover plate body 1, the stop rod 6 of the third plug 4 pushes the second stop plate 52 to move closer to the first stop plate 51, when the first stop plate 51 and the second stop plate 52 move closer, the second The limiting plate 52 pushes the second limiting plate 52 to move toward the direction of the first plug 2 under the drive of the limiting rod 6 of the third plug 4, so that the first plug 2 and the second plug 3 are The moved first limiting plate 51 and second limiting plate 52 limit their positions and cannot be moved, so that the first plug 2 and the second plug 3 cannot protrude from the cover body 1. Therefore, when one of the plugs is pushed out every time, the other plugs cannot be pushed out or can only be pushed out to half positions.

The utility model has the following advantages:

1. It has a multi-purpose socket hole and a variety of standard plugs, which can be applied to the conversion between any plug and any socket hole;

2. When in use, only one kind of plug protrudes from the surface of the housing. On the one hand, it can avoid contact with electrical appliances and is safe to use. On the other hand, the plug can be shrunk into the housing when not in use, so it is small in size and easy to carry .

3. The limiting device for limiting the activity of the plug of the utility model has a simple structure and low manufacturing cost.

The technical principles of the present utility model have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (10)

1. a power conversion plug extension, it is characterized in that, comprise a housing, electrical conduction device is provided with in described housing, the cylindrical body that described housing comprises one end open and the cover plate be fastened on the opening of described cylindrical body, the end face of described cylindrical body is provided with multipurpose socket hole, described cover plate arranges plug group, described electrical conduction device comprises that socket aperture conductive component that corresponding described multipurpose socket hole arranges and corresponding described plug group are arranged and the first circuit board that can be electrically connected with described plug group, described socket aperture conductive component and the electrical connection of described first circuit board, described plug group comprises three different plugs, be respectively the first plug, second plug and the 3rd plug, wherein the second plug can be transformed to the plug of two various criterions by the angle rotating pin, three described plugs are arranged at three sides of the inner chamber of described cover plate respectively, described first plug and described 3rd plug are oppositely arranged, described cover plate is also arranged two to stretch out after outside described housing to make a described plug by its displacement, limiting plate outside the not extended described housing of plug described in two other, two described limiting plates to be arranged between described first plug and described 3rd plug and in being oppositely arranged, two described limiting plates are all rotatably connected by bindiny mechanism and described cover plate.

2. a kind of power conversion plug extension according to claim 1, it is characterized in that, two described limiting plates are respectively the first limiting plate and the second limiting plate, each described limiting plate all has and the first end that described bindiny mechanism connects and second end relative with described first end, described first limiting plate is positioned at the side of described second limiting plate near described first plug, three described plugs are all arranged for limiting gag lever post movable separately, when described first plug stretches out described housing, the gag lever post of described first plug is butted on described first limiting plate, and promote described first limiting plate and described second limiting plate all moves towards the direction of described 3rd plug, to stop that described second plug and described 3rd plug stretch out described housing, when described second plug stretches out described housing, between the first end of described first limiting plate of gag lever post insertion of described second plug and the first end of described second limiting plate, and drive described first limiting plate and described second limiting plate to move towards the direction of described first plug and described 3rd plug respectively, to stop that described first plug and described 3rd plug stretch out described housing, when described 3rd plug stretches out described housing, the gag lever post of described 3rd plug is butted on described second limiting plate, and promote described second limiting plate and described first limiting plate all tilts towards the direction of described first plug, to stop that described second plug and described first plug stretch out described housing.

3. a kind of power conversion plug extension according to claim 2, it is characterized in that, described first limiting plate is near the side of described second limiting plate and be positioned on its first end and arrange the first inclined-plane, and described first inclined-plane, along the direction away from described cover plate, tilts to the first plug gradually; Near the side of described first limiting plate, corresponding described first inclined-plane arranges the second inclined-plane to described second limiting plate, and described second inclined-plane, along the direction away from described cover plate, tilts to the 3rd plug gradually; Described first inclined-plane and described second inclined-plane form V-shaped groove, and when described second plug does not stretch out housing, the gag lever post of described second plug is positioned at described V-shaped groove.

4. a kind of power conversion plug extension according to claim 2, it is characterized in that, described first limiting plate is near the side of described first plug and be positioned on its second end and arrange the 3rd inclined-plane, described 3rd inclined-plane is from the direction away from described cover plate, gradually tilt to the second limiting plate, when described first plug does not stretch out cover plate, the gag lever post of described first plug is positioned at the top on described 3rd inclined-plane, when described first plug stretches out downwards, described 3rd inclined-plane provides guide effect for the first limiting plate precise displacement; Described second limiting plate is near the side of described 3rd plug and be positioned on the second end described in it and arrange the 4th inclined-plane, described 4th inclined-plane is from the direction away from described cover plate, gradually tilt to described first limiting plate, when described 3rd plug does not stretch out cover plate, the gag lever post of described 3rd plug is positioned at the top on described 4th inclined-plane, when described 3rd plug stretches out downwards, described 4th inclined-plane provides guide effect for the second limiting plate precise displacement.

5. a kind of power conversion plug extension according to claim 1, it is characterized in that, described bindiny mechanism comprise two be positioned at described limiting plate both sides and the fixed head be fixed on described cover plate, two described fixed heads all arrange away from the side of the other side the clamping bar be connected with described cover plate, described limiting plate is connected with two described clamping bars by connecting plate, described fixed head and described clamping bar are all through described first circuit board, described connecting plate arranges two blocked holes that two described clamping bars can be made respectively to insert, the corresponding described connecting plate of described limiting plate arranges the square opening that can make the displacement of described limiting plate relatively described connecting plate generation certain distance.

6. a kind of power conversion plug extension according to claim 5, it is characterized in that, described fixed head has the 3rd end and four end relative with described 3rd end that connect with described cover plate, and what on the 4th end of two described fixed heads, setting can make the two ends of described connecting plate insert respectively puts board slot.

7. a kind of power conversion plug extension according to claim 1, it is characterized in that, also comprise the second circuit board being provided with USB interface, described second circuit board is positioned at described housing, on described cover plate, corresponding described second circuit board arranges the slot part that described second circuit board can be made to insert, described slot part is through described first circuit board, one end of described second circuit board to be inserted in described slot part and is electrically connected with first circuit board, the other end of described second circuit board is connected on the end face of cylindrical body, be stable in described housing to make described second circuit board, on the sidewall of described cylindrical body, corresponding described USB interface offers the USB patchhole communicated with described USB interface.

8. a kind of power conversion plug extension according to claim 1, it is characterized in that, on described first circuit board arrange can make described first circuit board and described socket aperture conductive component electrical connection two conductive poles, two described conductive poles insert in described socket aperture conductive component away from one end of described first circuit board.

9. a kind of power conversion plug extension according to claim 1, it is characterized in that, also arrange the many leads that can carry out leading when described first plug, described second plug and described 3rd telescopic plug in described housing, on described cover plate, described in corresponding every root, lead all arranges the lead fixing hole that one end of described lead can be made to insert.

10. a kind of power conversion plug extension according to claim 1, it is characterized in that, on described cover plate, the pin of corresponding each described plug arranges and pin can be made by pass outside described cover plate in described housing and can in the pin holes of wherein sliding, and each described plug all arranges near the side of described cover plate and makes described plug be anchored on spring fastener on described cover plate.