Universal adapter

Abstract

The utility model discloses a general conversion joint, including casing, the main frame body and circuit board of being located in the inside of casing and the panel of being covered in one end of casing, and the electricity -making plug includes the complex plug of meeting the multi -national specification, is equipped with the limiting component of electricity -making plug sliding to the state of waiting for use in the casing and limits electricity -making plug sliding, is used for limiting each electricity -making plug separate push -out use, is equipped with the fuse device in the casing, and the fuse device includes a safety tube and is used for fixing the safety tube's safety fixing frame, and the both ends of safety tube are placed in first fuse metal clamp and second fuse metal clamp respectively and are connected with electricity. The utility model relates to conversion socket technical field, specifically provides a kind of compact structure, safe and reliable general conversion joint, and only single plug works by limiting component forced, and integration fuse device and multifunctional charging conversion structure.

Description

Technical Field

[0001] This utility model relates to the field of conversion socket technology, specifically a universal conversion connector. Background Technology

[0002] Global travel adapters are primarily targeted at international travelers, solving the inconvenience caused by different socket standards in different countries. Currently available products on the market have the following shortcomings due to structural limitations:

[0003] 1. Traditional products use parallel or stacked structures to be compatible with plugs from multiple countries, resulting in a bulky overall size that is inconvenient to carry and too large to be used as travel items; 2. When the plugs are switched, they can be opened simultaneously, posing a risk of live prongs being exposed during use; 3. Most products lack an effective interlocking structure, making it impossible to ensure that only a single plug is in working condition.

[0004] To overcome the above problems, Chinese invention patent CN119401179A discloses a simple limiting adapter socket, proposing a solution to allow the plug to be pushed out separately through an interference plate limiting component. However, its structure is complex and does not integrate a multi-functional module. This application optimizes this design by integrating a compact limiting structure and a fuse device, providing a miniaturized, highly safe universal adapter. Utility Model Content

[0005] The present invention aims to provide a compact, safe and reliable universal adapter that forces only a single plug to work through a limiting component, and integrates a fuse device and a multi-functional charging conversion structure.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model proposes a universal adapter, including a housing, a main frame and circuit board disposed inside the housing, and a panel covering one end of the housing. The housing is provided with multiple power plugs and conductive plates corresponding to the power plugs. The panel is provided with a first socket for external plug connection. The housing is provided with a conductive sleeve in relation to the first socket. The housing is provided with a second socket on the side opposite to the panel.

[0008] The power connector includes multiple plugs conforming to multiple national standards. The main frame is located between the first socket and the second socket. The power connector is slidably connected to the side of the housing and is slidably mounted on the main frame. The second socket is used for the pins on the power connector to slide out. The housing is provided with a limiting component that restricts the sliding of the power connector when it is slid to the ready-to-use state, which is used to restrict each power connector from being pushed out and used individually.

[0009] The housing contains a fuse device that connects the conductive sheet, conductive sleeve, and circuit board to prevent circuit overload. A fuse slot is provided on the side of the main frame for sliding the fuse device. The fuse device includes a fuse tube and a fuse holder for fixing the fuse tube. A fuse mounting slot is provided on the side of the second socket. A fuse mounting base is provided at the bottom of the fuse holder and is embedded in the fuse mounting slot. The conductive sheet includes an N-pole conductive sheet and an L-pole conductive sheet. The L-pole conductive sheet includes an upper live wire conductive sheet and a lower live wire conductive sheet. A first fuse metal clip extending downwards is provided on one side of the upper live wire conductive sheet, and a second fuse metal clip is provided on one side of the lower live wire conductive sheet. The two ends of the fuse tube are respectively placed in the first fuse metal clip and the second fuse metal clip and are electrically connected.

[0010] Preferably, the safety fixing bracket consists of side plates arranged parallel to each other and an upper plate and a lower plate connected to the upper and lower ends of the side plates. The lower plate is fixedly connected to the safety mounting base. The upper plate is S-shaped to increase elasticity and facilitate the assembly of the safety tube. The upper plate and the lower plate are provided with relatively protruding upper and lower locking points at the center for fixing the safety tube.

[0011] Below the safety slot, there is also a spare safety slot. The spare safety slot has a protruding positioning point on the side away from the safety installation slot. The side end of the side plate is also provided with a pressure plate fixed to the safety installation seat. A movable spare safety tube is provided between the pressure plate and the positioning point for easy replacement.

[0012] Preferably, the N-pole conductive piece includes a conductive piece on the neutral line and a conductive piece on the bottom of the neutral line connected together. When the plug is turned on, the neutral line end of the plug is electrically connected to the conductive piece on the bottom of the neutral line, and the live line end of the plug is electrically connected to the conductive piece on the bottom of the live line.

[0013] Preferably, the limiting component includes:

[0014] The push-fit base is embedded at one end of each power connector and is insulated;

[0015] The connecting rod is fixed to the push base, and its end is provided with a push knob exposed outside the housing;

[0016] An interference plate is provided in the main frame, which has a groove on the side facing the push-twist. The interference plate is slidably disposed in the groove of the main frame, and its end is provided with a guide slope. After sliding, the interference plate retains only a single gap for one connecting rod to pass through, while the other connecting rods are blocked. When the interference plate touches the guide slope, it is forced to move within the groove.

[0017] As a further explanation, the panel is provided with any combination of European standard sockets, American standard sockets, British standard sockets, and Chinese / Australian standard sockets.

[0018] Preferably, the power connector includes a European standard plug, an American standard plug, and a British standard plug, which are respectively provided with European standard plug components, American standard plug components, and British standard plug components. The main frame is provided with European standard plug positioning points, American standard plug positioning points, and British standard plug positioning points, which are used for positioning the European standard plug components, American standard plug components, and British standard plug components, respectively.

[0019] Preferably, the circuit board is located at the lower part of the main frame and is electrically connected to the conductive sheet. The outer side of the circuit board is provided with a USB interface and multiple sets of Type-C interfaces. The USB interface and Type-C interface are fixed to the side and bottom of the housing for external plugs to be connected. Both the USB interface and Type-C interface are electrically connected to the circuit board. The bottom of the panel is provided with an LED light to indicate the power connection status.

[0020] Preferably, the housing is further provided with an extension device, which includes a storage shell disposed between the circuit board and the main frame. The storage shell has a positioning hole on its side and a winding shaft at its center. An extension line is wound around the outer periphery of the winding shaft. The end of the extension line has an extension connector and is slidably disposed outside the positioning hole. The lower part of the second insertion hole has a slot for fixing the extension connector.

[0021] Preferably, the European, American, and British plugs are stacked vertically through the second socket to reduce the overall volume; multiple sets of travel grooves are provided on the side of the housing for sliding of the push knob, and the push knob includes European push knob, American push knob, and British push knob distributed from top to bottom.

[0022] The universal adapter proposed in this utility model, with the above-described structure, achieves the following beneficial effects:

[0023] 1. An integrated fuse device is used to fix the fuse tube by the first fuse metal clip and the second fuse metal clip. The S-shaped upper plate facilitates the assembly of the fuse tube, realizes overload protection, and provides a spare fuse tube for easy replacement, thereby improving safety.

[0024] 2. The front panel features multiple plug types, compatible with major global plug standards, meeting the needs of international travel. The stacked power plugs, combined with a compact main frame and multi-functional interfaces such as USB and Type-C, significantly reduce the overall size and make it easy to carry. An extension device provides additional power extension functionality, enhancing its practicality.

[0025] 3. By using the interference plate structure in the limiting component, only a single power plug is forced to be in working state, avoiding short circuits and safety hazards caused by multiple plugs being pushed out at the same time. The structure is simple and occupies little space. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a front structural diagram of a universal adapter proposed in this application;

[0028] Figure 2 This is a schematic diagram of the back structure of a universal adapter proposed in this application;

[0029] Figure 3 This is a schematic diagram of the structure without a shell;

[0030] Figure 4 This is a schematic diagram of another structure without a shell;

[0031] Figure 5 Explosion of a universal adapter proposed in this application Figure 1 ;

[0032] Figure 6 Explosion of a universal adapter proposed in this application Figure 2 ;

[0033] Figure 7 This is a structural schematic diagram of the main frame in this application;

[0034] Figure 8 This is a schematic diagram showing the distribution of positioning points on the main frame in this application;

[0035] Figure 9 This is a schematic diagram of the electrical plug and fuse device in this application;

[0036] Figure 10 Schematic diagram of the conductive sheet and fuse device Figure 1 ;

[0037] Figure 11 This is a schematic diagram showing the composition of the power connector and the conductive plate;

[0038] Figure 12 A partial structural diagram of a fuse device. Figure 1 ;

[0039] Figure 13 A partial structural diagram of a fuse device. Figure 2 ;

[0040] Figure 14 This is a schematic diagram of the fuse device and extension device within the housing in this application;

[0041] Figure 15 for Figure 14 Explosion composition diagram;

[0042] Figure 16 This is a schematic diagram of the extension device;

[0043] Figure 17 This is a schematic diagram of the components of a European standard plug;

[0044] Figure 18 This is a schematic diagram of the internal structure of a European standard plug.

[0045] Figure 19 This is a schematic diagram of the components of a US standard plug;

[0046] Figure 20 This is a schematic diagram of the components of a British standard plug;

[0047] Figure 21 This is a schematic diagram showing the connection point between the US standard plug and the main frame.

[0048] Among them, 1. shell, 2. main frame, 3. circuit board, 4. panel, 5. power connector, 6. conductive sheet, 7. limiting component, 8. fuse device, 9. extension device.

[0049] 11. Second socket; 12. Safety mounting slot; 13. Card slot; 14. Travel slot;

[0050] 101. European standard socket; 102. American standard socket; 103. British standard socket.

[0051] 21. Safety lock slot; 22. Spare safety lock slot; 23. Positioning point; 24. European standard foot positioning point; 25. American standard foot positioning point; 26. British standard foot positioning point.

[0052] 31. USB interface; 32. Type-C interface; 33. LED light;

[0053] 41. First socket; 42. Conductive sleeve;

[0054] 51. European standard plug; 52. American standard plug; 53. British standard plug.

[0055] 511. European standard pin assembly; 521. American standard pin assembly; 531. British standard pin assembly.

[0056] 61. N-polar conductive sheet; 62. L-polar conductive sheet;

[0057] 611. Conductive sheet on the neutral line; 612. Conductive sheet on the neutral line.

[0058] 621. Upper live wire conductive piece; 622. Lower live wire conductive piece; 623. First fuse metal clip; 624. Second fuse metal clip;

[0059] 71. Push seat; 72. Connecting rod; 73. Push knob; 74. Interference plate; 75. Guide slope;

[0060] 731. European standard push-button, 732. American standard push-button, 733. British standard push-button;

[0061] 81. Fuse, 82. Fuse holder, 83. Spare fuse;

[0062] 821. Safety mounting bracket; 822. Side plate; 823. Top plate; 824. Bottom plate; 825. Upper locking point; 826. Lower locking point; 827. Pressure plate.

[0063] 91. Storage shell; 92. Positioning hole; 93. Rewind spool; 94. Extension cable; 95. Extension connector. Detailed Implementation

[0064] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0065] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0066] Example 1

[0067] like Figure 1 As shown, the technical solution adopted by this utility model is as follows:

[0068] refer to Figures 1-4 As shown, this embodiment discloses a universal adapter, including a housing 1, a main frame 2, a circuit board 3, a panel 4, a power plug 5, a conductive sheet 6, a limiting component 7, a fuse device 8, and an extension device 9.

[0069] like Figure 1 and Figure 2 As shown, the housing 1 is a box with one open end. The panel 4 covers the open end of the housing 1. The panel 4 is provided with a first socket 41, including a European standard socket 101, an American standard socket 102 and a British standard socket 103, for external plugs to be connected. The housing 1 is provided with a conductive sleeve 42 inside the first socket 41 for electrical connection with the external plug. The housing 1 is provided with a second socket 11 on the side opposite to the panel 4 for the plug pins of the power plug 5 to slide out.

[0070] refer to Figures 5-9 As shown, the main frame 2 is located between the first socket 41 and the second socket 11, and is detachably installed inside the housing 1. The power connector 5 includes a European standard connector 51, an American standard connector 52, and a British standard connector 53, corresponding to the European standard pin assembly 511, the American standard pin assembly 521, and the British standard pin assembly 531, respectively. The power connector 5 is slidably installed on the main frame 2 through a sliding cavity and is stacked vertically through the second socket 11 to reduce the overall volume. The main frame 2 is provided with European standard pin positioning points 24, American standard pin positioning points 25, and British standard pin positioning points 26 for positioning the corresponding pin assemblies.

[0071] like Figure 10 and Figure 11 As shown, the conductive sheet 6 is mounted on the main frame 2 and includes an N-pole conductive sheet 61 and an L-pole conductive sheet 62. The N-pole conductive sheet 61 includes a neutral wire conductive sheet 611 and a neutral wire conductive sheet 612, forming a layered conductive path. The L-pole conductive sheet 62 includes an upper live wire conductive sheet 621 and a lower live wire conductive sheet 622. A first fuse metal clip 623 extending downward is provided on one side of the upper live wire conductive sheet 621, and a second fuse metal clip 624 is provided on one side of the lower live wire conductive sheet 622, for holding the fuse device 8 mentioned below.

[0072] To enhance safety, this application incorporates a replaceable fuse device 8, which improves overload protection and facilitates assembly and use.

[0073] refer to Figure 12 and Figure 13 As shown, the fuse device 8 includes a fuse tube 81, a fuse holder 82, and a spare fuse tube 83. The main frame 2 has a fuse slot 21 and a spare fuse slot 22 on its side. The fuse holder 82 consists of a side plate 822, an upper plate 823, and a lower plate 824. The lower plate 824 is fixedly connected to a fuse mounting base 821, which is embedded in the fuse mounting slot 12 on the side of the second insertion hole 11. During disassembly and replacement, the fuse device can be removed entirely by snapping on the fuse mounting base 821. The upper plate 823 is S-shaped with an upper locking point 825 at its center, and the lower plate 824 has a lower locking point 826 at its center for fixing the fuse tube 81. Both ends of the fuse tube 81 are respectively placed in the first fuse metal clip 623 and the second fuse metal clip 624 to achieve electrical connection. The spare safety slot 22 has a positioning point 23 on the side away from the safety installation slot 12, and a pressure plate 827 is provided on the side end of the side plate 822. A spare safety tube 83 is provided between the pressure plate 827 and the positioning point 23 for easy replacement.

[0074] In this structure, the fuse device 8 is modularized and slidably installed, and a spare fuse tube 83 is provided, which greatly improves the reliability of overload protection and the convenience of user operation.

[0075] like Figure 14 and Figure 15 As shown, the circuit board 3 is located at the lower part of the main frame 2 and is electrically connected to the conductive sheet 6 and the conductive socket 42. The outer side of the circuit board 3 is equipped with a USB interface 31 and multiple sets of Type-C interfaces 32, fixed to the side and bottom of the housing 1 for charging external devices. An LED light 33 is located at the bottom of the panel 4 to indicate the power connection status. By integrating multiple modern charging interfaces and a visual feedback mechanism, the product's usability and user interaction experience are significantly improved.

[0076] refer to Figure 15 and Figure 16 As shown, the extension device 9 includes a storage shell 91, a positioning hole 92, a winding shaft 93, an extension cable 94, and an extension connector 95. The storage shell 91 is located between the circuit board 3 and the main frame 2. The positioning hole 92 is opened on its side end, and the winding shaft 93 is located at the center. The extension cable 94 is wound around the outer periphery of the winding shaft 93, and the extension connector 95 is provided at its tail end, which is slidably located outside the positioning hole 92. The lower part of the second socket 11 is provided with a slot 13 for fixing the extension connector 95. By having a built-in retractable extension cable 94, the application range of the adapter is effectively expanded, making it suitable for scenarios where the socket position is inconvenient and improving the applicability of the product.

[0077] like Figures 17-20 As shown, this embodiment integrates a compact limiting component 7 to enable forced single-plug operation. Specifically, the limiting component 7 includes a push base 71, a connecting rod 72, a push knob 73, and an interference plate 74. The push base 71 is embedded in one end of each plug 5 and has insulating properties. The connecting rod 72 is fixed to the push base 71, and its end has a travel groove 14 for the push knob 73 exposed outside the housing 1. The push knobs 73 include European standard push knob 731, American standard push knob 732, and British standard push knob 733 distributed sequentially from top to bottom. The main frame 2 has a groove on the side facing the push knob 73, and the interference plate 74 is slidably disposed in the groove, with a guide slope 75 at its end. When the user pushes a push knob 73, the connecting rod 72 touches the guide slope 75, forcing the interference plate 74 to move within the groove, forming a gap that allows only that connecting rod 72 to pass through, while blocking other connecting rods 72, ensuring that only a single plug 5 is pushed out. Specifically, the relevant structural components of the European standard plug 51, the American standard plug 52, and the British standard plug 53 are detailed in the reference patents provided in the background art, and will not be described in detail in this application.

[0078] The overall working principle of this embodiment is as follows:

[0079] When needed, the user first inserts the external plug through the first socket 41 on panel 4. Power is distributed to each component via conductive sleeve 42 and circuit board 3. If the power plug 5 is required, push the corresponding push knob 73. The limiting component 7 ensures that only one plug is pushed out, preventing simultaneous power supply. The fuse device 8 blows the fuse 81 in case of overload, protecting the circuit. If the fuse 81 blows in case of overload, the user can quickly replace it with a spare fuse 83. The extension device 9 allows the extension cable 94 to be pulled out, providing an additional power interface. USB and Type-C interfaces support charging of various devices, and LED 33 indicates the working status.

[0080] When using a single power connector 5, taking the US standard pin assembly 521 as an example, refer to... Figure 21 As shown, when the US standard pin is pushed to the bottom, the US standard push knob 732 moves outward under the action of the spring, at which point the US standard pin positioning point 25 is locked, and the US standard pin remains in the open state. To retract, press the US standard push knob 732 in the opposite direction, the US standard pin positioning point 25 disengages, and simultaneously apply an upward force to retract the US standard pin. The European standard pin positioning point 24, the US standard pin positioning point 25, and the British standard pin positioning point 26 are used to fix the European standard pin assembly 511, the US standard pin assembly 521, and the British standard pin assembly 531, respectively. The use of the European standard plug 51 and the British standard plug 53 is the same as that of the US standard plug 52 described above.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, material, or apparatus.

[0082] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0083] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A universal adapter, comprising a housing (1), a main frame (2) and a circuit board (3) disposed inside the housing (1), and a panel (4) covering one end of the housing (1), wherein the housing (1) is provided with a plurality of power plugs (5) and conductive plates (6) corresponding to the power plugs (5), the panel (4) is provided with a first socket (41) for external plug connection, a conductive sleeve (42) is provided in the housing (1) relative to the first socket (41), and a second socket (11) is provided on the side of the housing (1) opposite to the panel (4), characterized in that: The power connector (5) includes multiple plugs conforming to multiple national standards. The main frame (2) is located between the first socket (41) and the second socket (11). The power connector (5) is slidably connected to the side of the housing (1) and is slidably mounted on the main frame (2). The second socket (11) is used for the pins on the power connector (5) to slide out. The housing (1) is provided with a limiting component (7) to restrict the sliding of the power connector (5) when it slides to the ready-to-use state, which is used to restrict each power connector (5) from being pushed out and used individually. The housing (1) is equipped with a fuse device (8) that connects the conductive sheet (6), the conductive sleeve (42), and the circuit board (3) to prevent circuit overload. A fuse slot (21) is provided on the side of the main frame (2) for sliding the fuse device (8). The fuse device (8) includes a fuse tube (81) and a fuse holder (82) for fixing the fuse tube (81). A fuse mounting slot (12) is provided on the side of the second socket (11). A fuse mounting base (821) is provided at the bottom of the fuse holder (82) and is embedded in the fuse mounting slot. At position 12), the conductive sheet (6) includes an N-pole conductive sheet (61) and an L-pole conductive sheet (62). The L-pole conductive sheet (62) includes an upper power wire conductive sheet (621) and a lower power wire conductive sheet (622). A first fuse metal clip (623) extending downward is provided on one side of the upper power wire conductive sheet (621), and a second fuse metal clip (624) is provided on one side of the lower power wire conductive sheet (622). The two ends of the fuse tube (81) are respectively placed in the first fuse metal clip (623) and the second fuse metal clip (624) and electrically connected.

2. A universal adapter according to claim 1, characterized in that: The safety fixing bracket (82) consists of side plates (822) arranged parallel to each other and an upper plate (823) and a lower plate (824) connected to the upper and lower ends of the side plates (822). The lower plate (824) is fixedly connected to the safety mounting base (821). The upper plate (823) is S-shaped to increase elasticity and facilitate the assembly of the fuse tube (81). The upper plate (823) and the lower plate (824) are provided with upper locking points (825) and lower locking points (826) that are relatively protruding at the center for fixing the fuse tube (81). Below the safety slot (21), there is also a spare safety slot (22). The spare safety slot (22) has a raised positioning point (23) on the side away from the safety mounting slot (12). The side end of the side plate (822) is also provided with a pressure plate (827) fixed on the safety mounting base (821). A movable spare safety tube (83) is provided between the pressure plate (827) and the positioning point (23) for backup use and easy replacement.

3. A universal adapter according to claim 2, characterized in that: The N-pole conductive piece (61) includes a neutral line conductive piece (611) and a neutral line conductive piece (612) connected to each other. When the plug (5) is turned on, the neutral line end of the plug is electrically connected to the neutral line conductive piece (612), and the live line end of the plug is electrically connected to the live line conductive piece (622).

4. A universal adapter according to claim 3, characterized in that: The limiting component (7) includes: a push base (71), which is embedded in one end of each power connector (5) and has insulation; The connecting rod (72) is fixed on the push seat (71), and its end is provided with a push knob (73) exposed outside the housing (1); The interference plate (74) is provided with a groove on the side of the main frame (2) facing the push knob (73). The interference plate (74) is slidably disposed in the groove of the main frame (2), and its end is provided with a guide slope (75). After sliding, the interference plate (74) retains only a single gap for one connecting rod (72) to pass through, while the other connecting rods (72) are blocked. When the guide slope (75) of the interference plate (74) is touched, the interference plate (74) is forced to move in the groove.

5. A universal adapter according to claim 4, characterized in that: The panel (4) is provided with any combination of European standard sockets (101), American standard sockets (102), British standard sockets (103), and Chinese / Australian standard sockets.

6. A universal adapter according to claim 5, characterized in that: The power connector (5) includes a European standard plug (51), an American standard plug (52) and a British standard plug (53), and is provided with a European standard pin assembly (511), an American standard pin assembly (521) and a British standard pin assembly (531) respectively. The main frame (2) is provided with a European standard pin positioning point (24), an American standard pin positioning point (25) and a British standard pin positioning point (26), which are used for the positioning of the European standard pin assembly (511), the American standard pin assembly (521) and the British standard pin assembly (531) respectively.

7. A universal adapter according to claim 1, characterized in that: The circuit board (3) is located at the lower part of the main frame (2) and is electrically connected to the conductive sheet (6). The outer side of the circuit board (3) is provided with a USB interface (31) and multiple sets of type-C interfaces (32). The USB interface (31) and the type-C interface (32) are fixed to the side and bottom of the housing (1) for external plugs to be connected. The USB interface (31) and the type-C interface (32) are both electrically connected to the circuit board (3). The bottom of the panel (4) is provided with an LED light (33) to indicate the power connection status.

8. A universal adapter according to claim 1, characterized in that: The housing (1) is also provided with an extension device (9). The extension device (9) includes a storage shell (91) located between the circuit board (3) and the main frame (2). The storage shell (91) has a positioning hole (92) on its side and a winding shaft (93) at its center. An extension line (94) is wound around the outer periphery of the winding shaft (93). An extension connector (95) is provided at the end of the extension line (94) and is slidably located outside the positioning hole (92). The lower part of the second insertion hole (11) is provided with a slot (13) for fixing the extension connector (95).

9. A universal adapter according to claim 6, characterized in that: The European plug (51), American plug (52) and British plug (53) are stacked vertically through the second socket (11) to reduce the overall volume; the side of the housing (1) has multiple sets of travel grooves (14) for sliding of the push knob (73), which includes the European push knob (731), American push knob (732) and British push knob (733) distributed from top to bottom.

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