A multi-purpose plug

Abstract

The present invention is applicable to the field of plugs, and discloses a multi-purpose plug, including a front shell and a rear shell combined to form a cavity, the front shell is provided with a live pin assembly, a neutral pin assembly and a ground pin assembly, the live pin assembly, the neutral pin assembly and the ground pin assembly are arranged in a triangle, the cavity is provided with a knob assembly for controlling the live pin assembly and the neutral pin assembly to rotate synchronously, the front shell is also provided with a first receiving groove, the ground pin assembly includes a ground pin base provided in the cavity and a ground pin rotatably connected to the ground pin base and can be accommodated in the first receiving groove, the ground pin includes a national standard ground pin and a non-national standard ground pin that can be separated from the national standard ground pin. The multi-purpose plug provided by the present invention can realize switching between national standard sockets and non-national standard sockets and between two-hole sockets and three-hole sockets.

Description

Technical Field

[0001] The invention belongs to the field of plugs, and in particular relates to a multi-purpose plug. Background Art

[0002] With the development of economy and the improvement of people's living standards, more and more people frequently travel abroad, take vacations or work. During business trips or travels, they will carry electronic devices such as mobile phones, computers, cameras, etc. In order to keep these electronic devices in normal use, they must be charged. At present, the interfaces of sockets in many countries are different. For example, the national standard sockets and American standard sockets have different structures, and the pins of the plugs are different in size and shape. Some are cylindrical, some are sheet-shaped, and some are square. The distance between the pins is also different. This makes the electrical appliances produced in a certain country or region not meet the power plug and socket standards of another country or region, so the commonly used plugs cannot be switched between countries. And most of the existing travel sockets are equipped with one or more single conversion plugs, each conversion plug can only correspond to one socket interface, and it is impossible to switch between two-hole and three-hole sockets, causing many inconveniences. Summary of the invention

[0003] The present invention aims to solve at least one of the above technical problems and provides a multi-purpose plug which can be switched between national standard sockets and non-national standard sockets and between two-hole sockets and three-hole sockets.

[0004] The technical solution of the present invention is: a multi-purpose plug, including a front shell and a rear shell combined to form a cavity, the front shell is provided with a live wire pin assembly, a neutral wire pin assembly and a ground wire pin assembly, the live wire pin assembly, the neutral wire pin assembly and the ground wire pin assembly are arranged in a triangle, a knob assembly for controlling the live wire pin assembly and the neutral wire pin assembly to rotate synchronously is provided in the cavity, the front shell is also provided with a first receiving groove, the ground wire pin assembly includes a ground wire pin base arranged in the cavity and a ground wire pin rotatably connected to the ground wire pin base and can be accommodated in the first receiving groove, the ground wire pin includes a national standard ground wire pin and a non-national standard ground wire pin that can be separated from the national standard ground wire pin.

[0005] Optionally, the national standard ground wire pin is in a plate shape, the non-national standard ground wire pin is an American standard ground wire pin, and the American standard ground wire pin is in a column shape, and the American standard ground wire pin is rotatably mounted on the national standard ground wire pin.

[0006] Optionally, the national standard ground wire pin is provided with a first gripping position at one end close to the ground wire pin base.

[0007] Optionally, the firewire pin assembly comprises a firewire pin and a firewire pin base, and the firewire pin is rotatably connected to the firewire pin base;

[0008] The neutral line pin base comprises a neutral line pin and a neutral line pin base, and the neutral line pin is rotatably connected to the neutral line pin base.

[0009] Optionally, the front shell is further provided with a second receiving slot and a third receiving slot, the live wire pin can be rotatably received in the second receiving slot, and the neutral wire pin can be rotatably received in the third receiving slot.

[0010] Optionally, the live wire pin is provided with a second handle position at one end close to the live wire pin base, and the neutral wire pin is provided with a third handle position at one end close to the neutral wire pin base.

[0011] Optionally, the second receiving groove is provided with a first recessed groove at one end close to the live pin base, which cooperates with the second gripping position limiter to limit the rotation angle of the live pin assembly;

[0012] The third receiving groove is provided with a second recessed groove at one end close to the neutral pin base, which cooperates with the third handle position limiter to limit the rotation angle of the neutral pin assembly.

[0013] Optionally, the knob assembly includes a knob, two main gears and two driven gears, the two main gears are meshed with each other, and each of the main gears is also meshed with a driven gear, the knob is connected to one of the main gears, and the knob is arranged on the rear shell, and the live wire pin assembly and the neutral wire pin assembly are respectively fixedly connected to one of the driven gears.

[0014] Optionally, the rear shell is provided with a scale structure for displaying the rotation angle of the knob.

[0015] Optionally, a USB component is also provided in the cavity, and the USB component is electrically connected to the live wire pin assembly, the neutral wire pin assembly and the ground wire pin assembly. The USB component includes a USB interface, a PCB circuit board and an elastic element. The USB interface is electrically connected to the PCB circuit board, and the PCB circuit board is respectively connected to the live wire pin assembly, the neutral wire pin assembly and the ground wire pin assembly through the elastic element.

[0016] The multi-purpose plug provided by the present invention can synchronously rotate the live wire pin assembly and the neutral wire pin assembly through a knob assembly to adjust the relative angle of the live wire pin assembly and the neutral wire pin assembly, and can reasonably select the national standard ground wire pin or the non-national standard ground wire pin to participate in the work by rotating the ground wire pin into the first storage slot or taking it out from the first storage slot, so as to realize the switching between the national standard socket and the non-national standard socket; the ground wire pin can also be rotated into the first storage slot or taken out from the first storage slot to realize the switching between the two-hole socket and the three-hole socket, and the live wire pin and the neutral wire pin can also be rotated into the second storage slot and the third storage slot at the same time, which is convenient for sorting and storage, effectively saves space, and improves the convenience of travel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a structural schematic diagram of a multi-purpose plug provided by an embodiment of the present invention;

[0019] Figure 2 is another structural schematic diagram of a multi-purpose plug provided by an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of a multi-purpose plug provided by an embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of a ground wire pin assembly in a multi-purpose plug provided by an embodiment of the present invention;

[0022] Figure 5 It is a working schematic diagram of a knob assembly in a multi-purpose plug provided by an embodiment of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a multi-purpose plug provided by an embodiment of the present invention that is transformed into a national standard plug;

[0024] Figure 7 It is a structural schematic diagram of a multi-purpose plug transformed into a two-hole plug provided by an embodiment of the present invention;

[0025] Figure 8 This is another structural schematic diagram of a multi-purpose plug provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be noted that the terms “setting” and “connection” should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.

[0028] In addition, if there are terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating orientation or positional relationships in the embodiments of the present invention, they are based on the orientation or positional relationships shown in the drawings or the conventional placement state or usage state, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner unless there is any contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present invention will not be described separately.

[0030] like Figures 1 to 8As shown, a multi-purpose plug provided by an embodiment of the present invention comprises a front shell 1 and a rear shell 2 which are combined to form a cavity (not shown in the figure), the front shell 1 is provided with a live wire pin assembly 3, a neutral wire pin assembly 4 and a ground wire pin assembly 5, the live wire pin assembly 3, the neutral wire pin assembly 4 and the ground wire pin assembly 5 are arranged in a triangle (isosceles triangle or equilateral triangle), and a knob assembly 7 for controlling the live wire pin assembly 3 and the neutral wire pin assembly 4 to rotate synchronously is provided in the cavity (that is, the live wire pin assembly 3 can rotate around the central axis of the live wire pin base 32, and the neutral wire pin assembly 4 can rotate around the central axis of the neutral wire pin base 42), and the live wire pin assembly 3, the neutral wire pin assembly 4 and the ground wire pin assembly 5 are arranged in a triangle (isosceles triangle or equilateral triangle), and the cavity is provided with a knob assembly 7 for controlling the live wire pin assembly 3 and the neutral wire pin assembly 4 to rotate synchronously (that is, the live wire pin assembly 3 can rotate around the central axis of the live wire pin base 32, and the neutral wire pin assembly 4 can rotate around the central axis of the neutral wire pin base 42). The front shell 1 is also provided with a first receiving groove 510, and the ground wire pin assembly 5 includes a ground wire pin base 52 arranged in the cavity and a ground wire pin 51 hinged to the ground wire pin base 52 by a pin and rotatably received in the first receiving groove 510, and the ground wire pin 51 includes a national standard ground wire pin 511 and a non-national standard ground wire pin that can be separated from the national standard ground wire pin 511, and the rotation angle of the ground wire pin 51 is greater than or equal to 90°, that is, the angle between the ground wire pin 51 when it is received in the first receiving groove 510 and the angle between the ground wire pin 51 when it is fully opened is greater than or equal to 90°, so that the ground wire pin 51 can be completely received in the first receiving groove 510. When in use, according to the country or region, the live wire pin assembly 3 and the neutral wire pin assembly 4 are adjusted by the knob assembly 7 to change the relative angle of the live wire pin assembly 3 and the neutral wire pin assembly 4, and the national standard ground wire pin 511 and the non-national standard ground wire pin are selected to participate in the work, so as to realize the switching between the national standard socket and the non-national standard socket. According to the hole position of the socket, the ground wire pin 51 can be stored in the first storage slot 510 by rotating it, or it can be taken out from the first storage slot 510 to realize the switching between the two-hole and three-hole sockets. It has a wide range of applications, good practicality, and improves the convenience of travel.

[0031] Specifically, Figure 3 As shown, the boundary of the front shell 1 may be provided with a protrusion extending outward (not shown in the figure), and the boundary of the rear shell 2 may be provided with a groove matching the protrusion (not shown in the figure), and the front shell 1 and the rear shell 2 are both integrally molded by injection molding. When the front shell 1 and the rear shell 2 are combined into a whole, the protrusion and the groove fit each other, playing a limiting role, making the assembly of the front shell 1 and the rear shell 2 more convenient, and the front shell 1 and the rear shell 2 fit closely and have good contact.

[0032] Specifically, Figures 1 to 6As shown, the present invention takes a plug that can be switched between a national standard socket and an American standard socket as an example, the national standard ground wire pin 511 is in the shape of a plate, the non-national standard ground wire pin is an American standard ground wire pin 512, the American standard ground wire pin 512 is in the shape of a column, and the American standard ground wire pin 512 is rotatably sleeved on the national standard ground wire pin 511, that is, the national standard ground wire pin 511 and the American standard ground wire pin 512 can be combined into a whole, and the national standard ground wire pin 511 can be separated from the American standard ground wire pin 512 by rotation. For a three-hole socket, see Figure 6 When used in China, rotate the American standard ground wire pin 512 to store it in the first storage slot 510, and keep the national standard ground wire pin 511 to participate in the work; see Figure 1 When used in the United States, adjust the relative angles of the live wire pin assembly 3 and the neutral wire pin assembly 4, and rotate the national standard ground wire pin 511 to store it in the first storage slot 510, leaving only the American standard ground wire pin 512 to work, or put the American standard ground wire pin 512 on the national standard ground wire pin 511, so that the national standard ground wire pin 511 and the American standard ground wire pin 512 work at the same time. For two-hole sockets, see Figure 7 , the ground wire pin 51 needs to be rotated to be received in the first receiving slot 510 , so that the three-pin plug is transformed into a two-pin plug, and the relative angles of the live wire pin assembly 3 and the neutral wire pin assembly 4 are adjusted.

[0033] Specifically, Figures 4 to 8 As shown, the national standard ground wire pin 511 is provided with a first handle position 53 at one end close to the ground wire pin base 52, which is convenient for picking out the national standard ground wire pin 511 or / and the American standard ground wire pin 512 from the first storage slot 510. In this way, it is convenient for users to select to use the national standard three-pin plug, the American standard three-pin plug or the two-pin plug.

[0034] Specifically, Figure 3 As shown, the live pin assembly 3 includes a live pin 31 and a live pin base 32, the live pin base 32 can be embedded in the front shell 1, and one end of the live pin 31 is hinged to one end of the live pin base 32 through a pin; the neutral pin base 42 includes a neutral pin 41 and a neutral pin base 42, the neutral pin base 42 is embedded in the front shell 1, and one end of the neutral pin 41 is hinged to one end of the neutral pin base 42 through a pin, and the front shell 1 is also provided with a second receiving groove 311 and a third receiving groove 411, the live pin 31 is received in the second receiving groove 311 after being rotated with the pin as the axis, and the neutral pin 41 is received in the third receiving groove 411 after being rotated with the pin as the axis. Figure 8, the live wire pin 31 and the neutral wire pin 41 can be stored in the second storage slot 311 and the third storage slot 411 respectively, which is convenient to carry and effectively saves travel space. In practical applications, in order to completely store the live wire pin 31 and the neutral wire pin 41 in the second storage slot 311 and the third storage slot 411, the rotation angles of the live wire pin 31 and the neutral wire pin 41 are both greater than or equal to 90°, that is, the angle between the live wire pin 31 when it is stored in the second storage slot 311 and the live wire pin 31 when it is fully opened is greater than or equal to 90°, and the angle between the neutral wire pin 41 when it is stored in the third storage slot 411 and the neutral wire pin 41 when it is fully opened is greater than or equal to 90°.

[0035] In practical applications, such as Figure 3 and Figure 8 As shown, the first receiving groove 510, the second receiving groove 311 and the third receiving groove 411 are arranged parallel to each other, and the groove width of the first receiving groove 510 is slightly larger than the thickness of the American standard ground wire pin 512, the groove width of the second receiving groove 311 is slightly larger than the thickness of the live wire pin 31, and the groove width of the third receiving groove 411 is slightly larger than the thickness of the neutral wire pin 41.

[0036] Specifically, Figure 1 , Figure 3 and Figure 8 As shown, the live wire pin 31 is provided with a second handle position 312 at one end close to the live wire pin base 32 for facilitating the removal of the live wire pin 31 from the second receiving groove 311, and the neutral wire pin 41 is provided with a third handle position 412 at one end close to the neutral wire pin base 42 for facilitating the removal of the neutral wire pin 41 from the third receiving groove 411. The design is ingenious and easy to use.

[0037] In practical applications, see Figure 4The live wire pin assembly 3 and the neutral wire pin assembly 4 can also adopt the same structure as the ground wire pin assembly 5, and can be switched between the national standard socket and the European standard socket, and the national standard socket and the South African standard socket. That is, both the live wire pin assembly 3 and the neutral wire pin assembly 4 may also include a non-national standard pin, which is columnar, and the non-national standard pin is rotatably sleeved on the live wire pin 31 and can be separated from the live wire pin 31. One end of the live wire pin 31 and the non-national standard pin is rotatably connected to the live wire pin base 32 through a pin, and the non-national standard pin is rotatably sleeved on the neutral wire pin 41 and can be separated from the neutral wire pin 41. One end of the neutral wire pin 41 and the non-national standard pin is rotatably connected to the neutral wire pin base 42 through a pin. In order to adjust the angle of the live wire pin 31 and the neutral wire pin 41, the second storage groove 311 and the third storage groove 411 can be designed as fan-shaped grooves; as another embodiment, the live wire pin base 32 and the neutral wire pin base can be optimized. The structure of the seat 42, that is, the live wire pin base 32 and the neutral wire pin base 42 both include a tubular member and a columnar member, the tubular member is sleeved on the columnar member and fixedly connected to the front shell 1, the live wire pin 31 is rotatably connected to the columnar member, the neutral wire pin 41 is rotatably connected to the columnar member, the non-national standard pin is rotatably connected to the tubular member, and the columnar member can rotate relative to the tubular member, so that the live wire pin 31 can rotate relative to the non-national standard pin, and the neutral wire pin 41 can rotate relative to the non-national standard pin. When it is necessary to adjust the angle of the live wire pin 31 and the neutral wire pin 41, first put the non-national standard pins of the live wire pin assembly 3 and the neutral wire pin assembly 4 into the second storage groove 311 and the third storage groove 411, and then adjust the angle of the live wire pin 31 and the neutral wire pin 41.

[0038] Specifically, Figure 1 , Figure 3 and Figure 8 As shown, the second receiving groove 311 is provided with a first sunken groove 313 which cooperates with the second finger position 312 to limit the rotation angle of the live wire pin assembly 3 at one end close to the live wire pin base 32, and the third receiving groove 411 is provided with a second sunken groove 413 which cooperates with the third finger position 412 to limit the rotation angle of the neutral wire pin assembly 4 at one end close to the neutral wire pin base 42, and both the first sunken groove 313 and the second sunken groove 413 can be arc grooves. In this way, by controlling the arc length of the first sunken groove 313 and the second sunken groove 413, the maximum rotation angle of the live wire pin assembly 3 and the neutral wire pin assembly 4 can be limited.

[0039] Specifically, Figure 5As shown, the knob assembly 7 includes a knob 71, two main gears 72 and two driven gears 73, the two main gears 72 are meshed with each other, and each of the main gears 72 is also meshed with a driven gear 73, that is, one main gear 72 is externally meshed with another main gear 72 and a driven gear 73, the knob 71 is connected to one of the main gears 72, and the knob 71 is arranged on the rear shell 2 and the knob 71 may not protrude from the surface of the rear shell 2, so that the appearance of the rear shell 2 will not be damaged, and it is convenient for users to adjust, the live wire pin assembly 3 and the neutral wire pin assembly 3 are connected. The pin assembly 4 is fixedly connected to a driven gear 73, that is, the other end of the live pin base 32 and the neutral pin base 42 is fixedly connected to a driven gear 73, so that when the knob 71 is rotated, the rotation directions of the two meshing main gears 72 are opposite, and each main gear 72 drives a driven gear 73 to rotate, thereby driving the live pin assembly 3 and the neutral pin assembly 4 to rotate (the live pin assembly 3 and the neutral pin assembly 4 rotate in opposite directions, but the rotation angles are the same), so as to adjust the relative angles of the live pin assembly 3 and the neutral pin assembly 4. The design of two meshing main gears 72 can simultaneously complete the adjustment of the rotation angles of the live pin assembly 3 and the neutral pin assembly 4, and the operation is simple and the adjustment accuracy is high.

[0040] In practical applications, such as Figure 5 As shown, a sunken concave portion is provided on the surface of the knob 71, and a straight handle is provided in the sunken concave portion. The lower end of the knob 71 is connected to the main gear 72 via a connecting shaft.

[0041] Specifically, the rear housing 2 may be provided with a scale structure (not shown in the figure) for displaying the rotation angle of the knob 71 , so that the user can accurately adjust the deflection angles of the live wire pin assembly 3 and the neutral wire pin assembly 4 .

[0042] Specifically, Figure 3 As shown, a USB component 6 is also provided in the cavity, and the USB component 6 is electrically connected to the live wire pin component 3, the neutral wire pin component 4 and the ground wire pin component 5. The USB component 6 includes a USB interface 61, a PCB circuit board 62 and an elastic element 63. The USB interface 61 is electrically connected to the PCB circuit board 62, and the PSB circuit board is respectively connected to the live wire pin component 3, the neutral wire pin component 4 and the ground wire pin component 5 through the elastic element 63. Figure 1, the USB interface 61 is arranged on the side of the front shell 1 or the rear shell 2 to connect with the data line, and the USB interface 61 can also be arranged on the upper surface of the rear shell 2. In the embodiment of the present invention, the elastic element 63 is a POGO PIN element, the front shell 1 and the rear shell 2 are both triangular, and three corresponding USB interfaces 61 are arranged, respectively located on each side or upper surface of the rear shell 2. Of course, it can be understood that the front shell 1 and the rear shell 2 can also be in other shapes such as quadrilateral, pentagon, circle, etc.

[0043] In practical applications, since there are multiple USB interfaces 61, a transformer (not shown in the figure) for adjusting the output voltage of each USB interface 61 can be provided on the PCB circuit board 62 to meet the working needs of electrical appliances with different input voltages.

[0044] A multi-purpose plug provided by an embodiment of the present invention can synchronously rotate the live wire pin assembly 3 and the neutral wire pin assembly 4 through the knob assembly 7 to adjust the relative angle of the live wire pin assembly 3 and the neutral wire pin assembly 4, and by rotating the ground wire pin 51 into the first storage slot 510 or taking it out from the first storage slot 510, reasonably selecting the national standard ground wire pin 511 or the non-national standard ground wire pin 511 to participate in the work, so as to achieve switching between the national standard socket and the non-national standard socket, and by rotating the ground wire pin 51 into the first storage slot 510 or taking it out from the first storage slot 510, it can achieve switching between the two-hole socket and the three-hole socket, and at the same time, the live wire pin 31 and the neutral wire pin 41 can be rotated into the second storage slot 311 and the third storage slot 411, which is convenient for sorting and storage, effectively saving space, and improving travel convenience.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-purpose plug, comprising a front shell and a rear shell combined to form a cavity, the front shell being provided with a live wire pin assembly, a neutral wire pin assembly and a ground wire pin assembly, the live wire pin assembly, the neutral wire pin assembly and the ground wire pin assembly being arranged in a triangle, characterized in that: The cavity is provided with a knob assembly for controlling the live wire pin assembly and the neutral wire pin assembly to rotate synchronously, the front shell is also provided with a first receiving slot, the ground wire pin assembly comprises a ground wire pin base provided in the cavity and a ground wire pin rotatably connected to the ground wire pin base and receivable in the first receiving slot, the ground wire pin comprises a national standard ground wire pin and a non-national standard ground wire pin separable from the national standard ground wire pin, the national standard ground wire pin is in the shape of a plate, the non-national standard ground wire pin is an American standard ground wire pin, and the American standard ground wire pin is in the shape of a column, and the American standard ground wire pin is rotatably sleeved on the national standard ground wire pin; The live pin assembly comprises a live pin and a live pin base, wherein the live pin is rotatably connected to the live pin base; the neutral pin assembly comprises a neutral pin and a neutral pin base, wherein the neutral pin is rotatably connected to the neutral pin base; the live pin is provided with a second handle position at one end close to the live pin base, and the neutral pin is provided with a third handle position at one end close to the neutral pin base; The front shell is also provided with a second receiving groove and a third receiving groove, the live wire pin can be rotatably received in the second receiving groove, and the neutral wire pin can be rotatably received in the third receiving groove, the second receiving groove is provided with a first sunken groove cooperating with the second hand-picking position limiter for limiting the rotation angle of the live wire pin assembly at one end close to the live wire pin base, and the third receiving groove is provided with a second sunken groove cooperating with the third hand-picking position limiter for limiting the rotation angle of the neutral wire pin assembly at one end close to the neutral wire pin base.

2. A multi-purpose plug as claimed in claim 1, characterized in that: The national standard ground wire plug pin is provided with a first gripping position at one end close to the ground wire plug pin base.

3. A multi-purpose plug as claimed in claim 1, characterized in that: The first sink groove and the second sink groove are both arc-shaped grooves.

4. A multi-purpose plug as claimed in claim 1, characterized in that: The knob assembly includes a knob, two main gears and two driven gears, the two main gears are meshed with each other, and each of the main gears is also meshed with a driven gear, the knob is connected to one of the main gears, and the knob is arranged on the rear shell, and the live wire pin assembly and the neutral wire pin assembly are respectively fixedly connected to one of the driven gears.

5. A multi-purpose plug as claimed in claim 4, characterized in that: The rear shell is provided with a scale structure for displaying the rotation angle of the knob.

6. A multi-purpose plug as claimed in claim 1, characterized in that: A USB component is also provided in the cavity, and the USB component is electrically connected to the live wire pin component, the neutral wire pin component and the ground wire pin component. The USB component includes a USB interface, a PCB circuit board and an elastic element. The USB interface is electrically connected to the PCB circuit board, and the PCB circuit board is respectively connected to the live wire pin component, the neutral wire pin component and the ground wire pin component through the elastic element.

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