A plug protective sleeve, a plug structure, and an electrical device

Abstract

This invention relates to the field of electrical equipment technology, providing a plug protective sleeve, a plug structure, and electrical equipment. The plug protective sleeve includes: a housing with an L-pole socket, an N-pole socket, and a ground socket; a surge protection module disposed on the housing; a first conductive element disposed on the housing, electrically connected to the surge protection module, and contacting the L-pole pin when the L-pole pin passes through the L-pole socket; and a second conductive element disposed on the housing, electrically connected to the surge protection module, and contacting the N-pole pin when the N-pole pin passes through the N-pole socket. The plug protective sleeve provided by this invention works in conjunction with the plug of the electrical equipment to achieve surge protection. Replacing the surge protection module is as simple and convenient as removing the protective sleeve from the plug and assembling a new protective sleeve with the plug. Furthermore, the surge protection module does not require a separate socket hole, improving the utilization rate of the socket hole.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, specifically to a plug protective sleeve, a plug structure, and electrical equipment. Background Technology

[0002] Electrical equipment integrates many electronic components. When a surge current or voltage suddenly occurs in the electrical circuit due to external interference, it can cause a powerful impact and damage to the electrical equipment, resulting in irreparable harm. Therefore, surge protection modules are needed to protect electrical equipment. Surge protection modules can conduct and divert current in a very short time, thereby avoiding damage to electrical equipment from surges.

[0003] In existing technologies, electrical equipment such as power sockets with plugs and electrical appliances with plugs typically have surge protection modules built into them or are connected separately to the socket socket supplying power to the equipment to achieve surge protection. If the surge protection module is built into the equipment, when it fails and needs to be replaced, or when a higher-strength surge protection module is required, the entire equipment must be disassembled to replace the module, which is inconvenient for replacement and upgrades. On the other hand, connecting the surge protection module separately to the socket inevitably occupies a socket socket, potentially leading to insufficient socket socket capacity or crowded socket space. Summary of the Invention

[0004] This invention provides a plug protective sleeve, which aims to solve the problems of existing technologies where the surge protection module is built into electrical equipment, making it inconvenient to replace and upgrade the surge protection module, and the surge protection module being inserted into the socket can easily lead to insufficient number of socket holes or crowded socket insertion space.

[0005] This invention is implemented as follows: a plug protective sleeve, comprising:

[0006] The housing has an L-pole socket through which the L-pole pin of the plug passes, an N-pole socket through which the N-pole pin of the plug passes, and a ground-pole socket through which the ground-pole pin of the plug passes.

[0007] Surge protection module installed in the housing;

[0008] A first conductive element is disposed on the housing and located on one side of the L-pole socket. The first conductive element is electrically connected to the surge protection module. The first conductive element contacts the L-pole pin when the L-pole pin passes through the L-pole socket.

[0009] A second conductive element is disposed on the housing and located on one side of the N-pole socket. The second conductive element is electrically connected to the surge protection module. The second conductive element contacts the N-pole pin when the N-pole pin passes through the N-pole socket.

[0010] Preferably, the housing includes a lower cover and an upper cover, which are closed together to form a receiving cavity for accommodating the plug, and the L-pole socket, the N-pole socket and the ground-pole socket are located on the lower cover.

[0011] Preferably, when the upper cover is closed on the lower cover, the upper cover presses the plug firmly onto the lower cover.

[0012] Preferably, both the first conductive element and the second conductive element include an upper conductive sheet fixed to the upper cover and a lower conductive sheet fixed to the lower cover, and the upper conductive sheet and the lower conductive sheet are interlocked with each other;

[0013] The upper conductive plate of the first conductive element and the upper conductive plate of the second conductive element are respectively electrically connected to the surge protection module. The lower conductive plate of the first conductive element is disposed on one side of the L pole socket and is used to contact the L pole pin of the plug. The lower conductive plate of the second conductive element is disposed on one side of the N pole socket and is used to contact the N pole pin of the plug.

[0014] Preferably, the first conductive element is in elastic contact with the L-pole pin; the second conductive element is in elastic contact with the N-pole pin.

[0015] Preferably, the plug protective sleeve also includes a night light fixed to the housing and electrically connected to the first conductive element and the second conductive element respectively.

[0016] Preferably, the plug protective sleeve further includes a circuit board fixed to the housing and electrically connected to the first conductive element and the second conductive element respectively, and a USB interface connected to the circuit board.

[0017] Preferably, the upper cover and the lower cover overlap each other to form a through hole; the plug includes a main body and a wiring portion extending from the main body for connecting to a wire, the L-pole pin, the N-pole pin and the ground-pole pin are fixed to the main body, the main body is received in the receiving cavity, and the wiring portion passes through the through hole.

[0018] The present invention also provides a plug structure, including a plug and the above-mentioned plug protective sleeve. The plug includes an L-pole pin, an N-pole pin and a ground pin. The L-pole pin of the plug passes through the L-pole socket and contacts the first conductive element. The N-pole pin of the plug passes through the N-pole socket and contacts the second conductive element. The ground pin of the plug passes through the ground socket.

[0019] The present invention also provides an electrical device including the plug structure described above.

[0020] The plug protective sleeve provided by this invention incorporates a surge protection module and features an L-pole socket, an N-pole socket, and a ground socket on its housing. A first conductive element, electrically connected to the surge protection module, is located on the L-pole socket side, and a second conductive element, also electrically connected to the surge protection module, is located on the N-pole socket side. When used in conjunction with a plug, the L-pole pin passes through the L-pole socket and contacts the first conductive element, while the N-pole pin passes through the N-pole socket and contacts the second conductive element. This allows the surge protection module to be electrically connected to the L-pole and N-pole pins of the plug via the first and second conductive elements, respectively. When a surge voltage occurs at the plug, the surge protection module of the plug protective sleeve provides surge protection for the electrical equipment connected to the plug, preventing damage to the equipment. When the surge protection module of the plug cover is damaged and needs to be replaced, or when a surge protection module with higher surge protection capability needs to be replaced, simply remove the plug cover from the plug and assemble the new plug cover with the plug to replace the surge protection module. This makes the replacement and upgrade of the surge protection module simple and convenient. Moreover, there is no need to insert the surge protection module separately into the socket hole, and it does not occupy the socket hole, avoiding the problem of insufficient number of socket holes or crowded socket insertion space. Thus, the replacement and upgrade of the surge protection module is simple and convenient, and the surge protection module does not occupy the socket hole separately, improving the utilization rate of the socket hole. Attached Figure Description

[0021] Figure 1 A perspective structural diagram of the socket structure provided in an embodiment of the present invention;

[0022] Figure 2 This is an exploded perspective view of the socket structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a perspective structural diagram of the plug protective sleeve provided in an embodiment of the present invention;

[0024] Figure 4 An exploded perspective view of the plug protective sleeve provided in an embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the plug protective sleeve portion provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the plug protective sleeve provided in an embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] The plug structure provided in this embodiment of the invention features a protective sleeve with a surge protection module. The protective sleeve includes an L-pole socket, an N-pole socket, and a ground socket. A first conductive element, electrically connected to the surge protection module, is located on the L-pole socket side, and a second conductive element, also electrically connected to the surge protection module, is located on the N-pole socket side. When the plug and protective sleeve are used together, the L-pole pin passes through the L-pole socket and contacts the first conductive element, while the N-pole pin passes through the N-pole socket and contacts the second conductive element. This allows the surge protection module to be electrically connected to the L-pole and N-pole pins of the plug via the first and second conductive elements, respectively. When a surge voltage occurs at the plug, the surge protection module of the protective sleeve provides surge protection for the electrical equipment connected to the plug, preventing damage to the equipment. When the surge protection module of the plug cover is damaged and needs to be replaced, or when a surge protection module with higher surge protection capability needs to be replaced, simply remove the plug cover from the plug and assemble the new plug cover with the plug to replace the surge protection module. This makes the replacement and upgrade of the surge protection module simple and convenient. Moreover, there is no need to insert the surge protection module separately into the socket hole. The surge protection module does not occupy the socket hole, avoiding the problem of insufficient socket holes or crowded socket insertion space.

[0029] Please refer to Figures 1-4 This invention provides a plug structure, including a plug 1 and a plug protective sleeve 2. The plug 1 includes an L-pole pin 11, an N-pole pin 12 and a ground pin 13.

[0030] Please refer to the reference. Figures 5-6 The plug protective sleeve 2 includes: a housing 20, which has an L-pole socket 201 through which the L-pole pin 11 of the plug 1 passes, an N-pole socket 202 through which the N-pole pin 12 of the plug 1 passes, and a ground-pole socket 203 through which the ground-pole pin 13 of the plug 1 passes; a surge protection module 21 disposed on the housing 20; a first conductive element 22 disposed on the housing 20 and located on one side of the L-pole socket 201, the first conductive element 22 being electrically connected to the surge protection module 21, and the first conductive element 22 contacting the L-pole pin 11 when the L-pole pin 11 passes through the L-pole socket 201; and a second conductive element 23 disposed on the housing 20 and located on one side of the N-pole socket 202, the second conductive element 23 being electrically connected to the surge protection module 21, and the second conductive element 23 contacting the N-pole pin 12 when the N-pole pin 12 passes through the N-pole socket 202.

[0031] In this embodiment of the invention, plug 1 is a standard three-prong plug, with an L-pole socket 201, an N-pole socket 202, and a ground socket 203 forming a standard three-prong socket. When plug 1 and plug protective sleeve 2 are assembled, the L-pole pin 11 of plug 1 passes through the L-pole socket 201 and contacts the first conductive element 22, the N-pole pin 12 of plug 1 passes through the N-pole socket 202 and contacts the second conductive element 23, and the ground pin 13 of plug 1 passes through the ground socket 203, so that the surge protection module 21 is electrically connected to the L-pole pin 11 and the N-pole pin 12 through the first conductive element 22 and the second conductive element 23, respectively. When a surge voltage occurs in plug 1, the surge protection module 21 protects the electrical equipment connected to plug 1, preventing the electrical equipment from being damaged by the surge voltage. In addition to this embodiment, plug 1 can also be a standard three-prong plug such as an American standard or a European standard, with the sockets on the plug protective sleeve 2 adapted to the pins of plug 1.

[0032] In this embodiment of the invention, when the plug protective sleeve 2 is used in conjunction with the plug 1, it is only necessary to pass the L-pole pin 11, N-pole pin 12 and ground pin 13 on the plug 1 through the L-pole socket 201, N-pole socket 202 and ground socket 203 of the plug protective sleeve 2 respectively, so that the L-pole pin 11 of the plug 1 contacts the first conductive element 22 and the N-pole pin 12 of the plug 1 contacts the second conductive element 23. Thus, the plug protective sleeve 2 protects the electrical equipment connected to the plug 1 through the surge protection module 21 to prevent damage to the electrical equipment.

[0033] When the surge protection module 21 of the plug protective sleeve 2 is damaged and needs to be replaced, simply remove the plug protective sleeve 2 from the plug 1 and assemble the new plug protective sleeve 2 with the plug 1 to replace the surge protection module 21. The replacement of the surge protection module 21 is simple and convenient. Similarly, when a surge protection module 21 with higher surge protection capability needs to be replaced, simply remove the plug protective sleeve 2 from the plug 1 and assemble the plug protective sleeve 2 with the higher surge protection capability onto the plug 1 to upgrade the surge protection module 21. This makes the replacement and upgrade of the surge protection module 21 simple and convenient. Furthermore, there is no need to separately plug the surge protection module into the socket, and the surge protection module does not occupy a socket hole, avoiding the problem of insufficient socket holes or crowded socket space. This makes the replacement and upgrade of the surge protection module simple and convenient, and improves the utilization rate of the socket holes by not occupying a separate socket hole.

[0034] In one embodiment of the present invention, the housing 20 includes a lower cover 204 and an upper cover 205, which together form a receiving cavity for accommodating the plug 1. The L-pole socket 201 and the N-pole socket 202 are located on the lower cover 204. Simultaneously, by providing the receiving cavity, the safety performance of the plug 1 during use is improved, and it also serves to prevent dust and water penetration, ensuring stable electrical conductivity between the plug 1 and the socket.

[0035] In one embodiment of the present invention, when the upper cover 205 is closed on the lower cover 204, the upper cover 205 presses the plug 1 firmly onto the lower cover 204. Through the cooperation of the lower cover 204 and the upper cover 205, the upper cover 205 directly or indirectly abuts against the plug 1, thereby pressing the plug 1 firmly onto the lower cover 204 and preventing the plug 1 from loosening. This ensures that the L-pole pin 11 of the plug 1 is in stable contact with the first conductive element 22, and the N-pole pin 12 of the plug 1 is in stable contact with the second conductive element 23, thereby improving the reliability of the surge protection function.

[0036] In one embodiment of the present invention, the upper cover 205 and the lower cover 204 are interlocked. By setting the upper cover 205 and the lower cover 204 to be interlocked, it is convenient to assemble the upper cover 205 and the lower cover 204, and the upper cover 205 and the lower cover 204 are firmly assembled.

[0037] In one embodiment of the present invention, the lower cover 204 is provided with a bottom wall 2041, and the L-pole socket 201, N-pole socket 202 and ground socket 203 are provided on the lower cover 204. When the plug protective sleeve 2 is assembled with the plug 1, the L-pole pin 11, N-pole pin 12 and ground pin 13 of the plug 1 pass through the L-pole socket 201, N-pole socket 202 and ground socket 203 on the bottom wall 2041 in sequence.

[0038] As an embodiment of the present invention, the plug protective sleeve 2 also includes an indicator light 24 disposed on the housing 20. The indicator light 24 is electrically connected to the first conductive element 22 and the second conductive element 23 respectively. The indicator light 24 can be directly electrically connected to the first conductive element 22 and the second conductive element 23, or it can be electrically connected to the first conductive element 22 and the second conductive element 23 via a wire. By providing the indicator light 24, when the L-pin 11 and N-pin 12 of the plug 1 are plugged into the power socket, the indicator light 24 illuminates because it is electrically connected to the L-pin 11 and the N-pin 12, thus serving as a power indicator. When a surge voltage occurs in the plug 1, causing the surge protection module 21 to be damaged, the indicator light 24 will also be damaged due to the surge voltage. Therefore, when the surge protection module 21 is damaged, the indicator light 24 will turn off, indicating that the surge protection module 21 is damaged, and thus reminding the user that the surge protection module 21 is damaged and needs to be replaced.

[0039] As an embodiment of the present invention, the upper cover 205 is provided with a slot 2051 corresponding to the indicator light 24, so that the light generated by the indicator light 24 can pass through the slot 2051, making it easy for the user to see whether the indicator light 24 is on or off.

[0040] As an embodiment of the present invention, the plug protective sleeve 2 further includes a fixing plate 25 housed within a receiving cavity and fixed to the upper cover 205, and the surge protection module 21 is fixed to the fixing plate 25. The fixing plate 25 facilitates the fixed installation of the surge protection module 21. The indicator light 24 is housed within the receiving cavity and fixed to the fixing plate 25, facilitating the fixed installation of the indicator light 24.

[0041] As an embodiment of the present invention, the plug protective sleeve 2 may further include a night light (not shown) fixed to the housing 20 and electrically connected to the first conductive element 22 and the second conductive element 23 respectively. When the L-pin 11, N-pin 12 and ground pin 13 of the plug 1 are plugged into the power socket, the L-pin 11 and N-pin 12 of the plug 1 are cleverly used to power the night light, providing illumination for the user at night, making it convenient for the user to use. Moreover, due to the illumination of the night light, it is convenient for the user to plug and unplug the plug 1 at night.

[0042] As an embodiment of the present invention, the plug protective sleeve 2 may further include a circuit board (not shown) fixed to the housing 20 and electrically connected to the first conductive element 22 and the second conductive element 23 respectively, and a USB interface (not shown) connected to the circuit board. When the L-pin 11, N-pin 12 and ground-pin 13 of the plug 1 are plugged into the power socket, the user can use the USB interface on the plug protective sleeve 2 to charge electronic devices, enriching the functionality of the plug protective sleeve 2 and greatly facilitating the user's use.

[0043] As an embodiment of the present invention, the first conductive element 22 and the second conductive element 23 both include an upper conductive sheet 221 fixed to the upper cover 205 and a lower conductive sheet 222 fixed to the lower cover 204, and the upper conductive sheet 221 and the lower conductive sheet 222 are plugged into each other; the upper conductive sheet 221 of the first conductive element 22 and the upper conductive sheet 221 of the second conductive element 23 are respectively electrically connected to the surge protection module 21; the lower conductive sheet 222 of the first conductive element 22 is disposed on one side of the L pole socket 201 and is used to contact the L pole pin 11 of the plug 1; the lower conductive sheet 222 of the second conductive element 23 is disposed on one side of the N pole socket 202 and is used to contact the N pole pin 12 of the plug 1.

[0044] In this embodiment, by configuring the first conductive element 22 and the second conductive element 23 to include an upper conductive sheet 221 fixed to the upper cover 205 and a lower conductive sheet 222 fixed to the lower cover 204, the upper conductive sheet 221 and the lower conductive sheet 222 are interlocked with each other. When the upper cover 205 and the lower cover 204 are closed, the upper conductive sheet 221 and the lower conductive sheet 222 can be interlocked, thereby realizing the electrical connection between the upper conductive sheet 221 and the lower conductive sheet 222, and thus realizing the electrical connection between the surge protection module 21 and the lower conductive sheet 222, making the assembly of the first conductive element 22 and the second conductive element 23 convenient.

[0045] In this embodiment, the L-pin 11, N-pin 12, and ground pin 13 of the plug 1 pass through the L-hole 201, N-hole 202, and ground hole 203 on the lower cover 204 in sequence, so that the L-pin 11 of the plug 1 contacts the lower conductive piece 222 of the first conductive element 22, and the N-pin 12 of the plug 1 contacts the lower conductive piece 222 of the second conductive element 23. Then, the upper cover 205 is closed with the lower cover 204, so that the upper conductive piece 221 and the lower conductive piece 222 of the first conductive element 22 and the second conductive element 23 are connected to each other, thereby realizing the electrical connection between the surge protection module 21 and the L-pin 11 and the N-pin 12.

[0046] As an embodiment of the present invention, the first conductive element 22 is in elastic contact with the L pole pin 11; the second conductive element 23 is in elastic contact with the N pole pin 12.

[0047] In this embodiment, the elasticity of the first conductive element 22 and the second conductive element 23 is utilized to make the first conductive element 22 elastically contact the L pole pin 11 and the second conductive element 23 elastically contact the N pole pin 12, thereby making the first conductive element 22 in close contact with the L pole pin 11 and the second conductive element 23 in close contact with the N pole pin 12, preventing the plug 1 from coming loose, resulting in good electrical contact stability and ensuring that the surge protection module 21 works stably and reliably.

[0048] As an embodiment of the present invention, the plug protective sleeve 2 further includes a pressure plate 26 housed within a receiving cavity. The lower conductive sheet 222 of the first conductive element 22 and the lower conductive sheet 222 of the second conductive element 23 are fixed between the pressure plate 26 and the bottom wall 2041, thereby fixing the lower conductive sheet 222 of the first conductive element 22 and the lower conductive sheet 222 of the second conductive element 23 onto the lower cover 204. The pressure plate 26 is provided with through holes corresponding to the L-pole socket 201, the N-pole socket 202, and the ground socket 203, respectively, so that the L-pole pin 11, the N-pole pin 12, and the ground pin 13 of the plug 1 pass through the pressure plate 26.

[0049] In one embodiment of the present invention, the upper cover 205 and the lower cover 204 are fitted together to form a through hole 27; the plug 1 includes a main body 14 and a wiring portion 15 extending from the main body 14 for connection with a wire. An L-pole pin 11, an N-pole pin 12, and a ground pin 13 are fixed to the main body 14, which is housed within a receiving cavity. The wiring portion 15 passes through the through hole 27. The wiring portion 15 is connected to an electrical device via a wire.

[0050] In this embodiment, when the plug protective sleeve 2 is assembled with the plug 1, the main body 15 is housed in the receiving cavity, and then the L-pole pin 11, N-pole pin 12 and ground pin 13 of the plug 1 are sequentially passed through the through holes on the pressure plate 26, and the L-pole pin 11, N-pole pin 12 and ground pin 13 of the plug 1 are sequentially passed through the L-pole socket 201, N-pole socket 202 and ground socket 203 on the lower cover 204, until the main body 15 abuts against the pressure plate 26. At this time, the plug 1 and the plug protective sleeve 2 are inserted into place. Then the upper cover 205 is placed on the lower cover 204, so that the upper conductive plate 221 and lower conductive plate 222 of the first conductive member 22 and the second conductive member 23 are inserted into each other, and the wiring part 15 passes through the through hole 27 to complete the assembly of the plug protective sleeve 2 and the plug 1.

[0051] This invention also provides an electrical device including the aforementioned plug structure. The electrical device can be a power socket with a plug or an electrical appliance with a plug. When the electrical device is an electrical appliance with a plug, by adding a plug protective sleeve 1 to the plug 1 of the electrical appliance, an additional layer of surge protection is added before the electrical appliance with its existing surge protection function, thus providing secondary surge protection. When a surge voltage occurs at the plug 1 of the electrical appliance, surge protection is first provided by the surge protection module 21 of the plug protective sleeve 2, thereby preventing damage to the surge protection module and other components inside the electrical appliance. Alternatively, when the electrical device is a power socket with a plug, a plug protective sleeve 1 is added to the plug of the power socket, and the plug protective sleeve 2 provides further surge protection for the electrical appliance electrically connected to the socket.

[0052] When the surge protection module 21 of the plug protective sleeve 2 is damaged and needs to be replaced, simply remove the plug protective sleeve 2 from the plug 1 and assemble the new plug protective sleeve 2 with the plug 1 to complete the replacement of the surge protection module 21. When it is necessary to replace the surge protection module 21 with one that has a higher surge protection capability to improve the surge protection capability of the electrical equipment, it is also only necessary to remove the plug protective sleeve 2 from the plug 1 and assemble the plug protective sleeve 2 with the surge protection module 21 that has a higher surge protection capability onto the plug 1. Upgrading the surge protection module 21 is simple and convenient, without the need to replace the surge protection module inside the electrical equipment, making the replacement and upgrading of the surge protection module 21 of the electrical equipment simple and convenient. Moreover, there is no need to insert the surge protection module separately into the socket, and the surge protection module does not occupy the socket socket, avoiding the problem of insufficient socket sockets or crowded socket space. This makes the replacement and upgrading of the surge protection module simple and convenient, and does not require occupying a socket socket.

[0053] The plug structure provided in this embodiment of the invention features a protective sleeve with a surge protection module. The protective sleeve includes an L-pole socket, an N-pole socket, and a ground socket. A first conductive element, electrically connected to the surge protection module, is located on the L-pole socket side, and a second conductive element, also electrically connected to the surge protection module, is located on the N-pole socket side. When the plug and protective sleeve are used together, the L-pole pin passes through the L-pole socket and contacts the first conductive element, while the N-pole pin passes through the N-pole socket and contacts the second conductive element. This allows the surge protection module to be electrically connected to the L-pole and N-pole pins of the plug via the first and second conductive elements, respectively. When a surge voltage occurs at the plug, the surge protection module of the protective sleeve provides surge protection for the electrical equipment connected to the plug, preventing damage to the equipment. When the surge protection module of the plug cover is damaged and needs to be replaced, or when a surge protection module with higher surge protection capability needs to be replaced, simply remove the plug cover from the plug and assemble the new plug cover with the plug to replace the surge protection module. This makes the replacement and upgrade of the surge protection module simple and convenient. Moreover, there is no need to plug the surge protection module into the socket separately. The surge protection module does not occupy the socket socket, avoiding the problem of insufficient socket sockets or crowded socket space. This makes the replacement and upgrade of the surge protection module simple and convenient, and does not occupy the socket socket separately, thus improving the utilization rate of the socket socket.

[0054] The embodiments provided above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plug protective sleeve, characterized in that, include: The housing includes an L-pole socket for the L-pole pin of the plug to pass through, an N-pole socket for the N-pole pin of the plug to pass through, and a ground-pole socket for the ground-pole pin of the plug to pass through. The housing includes a lower cover and an upper cover, which are snap-fitted together to form a receiving cavity for accommodating the plug. The L-pole socket, the N-pole socket, and the ground-pole socket are located on the lower cover. The upper cover and the lower cover are closed together to form a through hole. The plug includes a main body and a connector extending from the main body for connecting to a wire. The L-pole pin, the N-pole pin, and the ground-pole pin are fixed to the main body, which is housed within the receiving cavity. The connector passes through the through hole. Surge protection module installed in the housing; A first conductive element is disposed on the housing and located on one side of the L-pole socket. The first conductive element is electrically connected to the surge protection module. The first conductive element contacts the L-pole pin when the L-pole pin passes through the L-pole socket. The first conductive element and the L-pole pin are in elastic contact. A second conductive element is disposed on the housing and located on one side of the N-pole socket. The second conductive element is electrically connected to the surge protection module. The second conductive element contacts the N-pole pin when the N-pole pin passes through the N-pole socket. The second conductive element is in elastic contact with the N-pole pin.

2. The plug protective sleeve according to claim 1, characterized in that, When the upper cover is closed on the lower cover, the upper cover presses the plug firmly onto the lower cover.

3. The plug protective sleeve according to claim 1, characterized in that, Both the first conductive element and the second conductive element include an upper conductive sheet fixed to the upper cover and a lower conductive sheet fixed to the lower cover, and the upper conductive sheet and the lower conductive sheet are interlocked with each other; The upper conductive plate of the first conductive element and the upper conductive plate of the second conductive element are respectively electrically connected to the surge protection module. The lower conductive plate of the first conductive element is disposed on one side of the L pole socket and is used to contact the L pole pin of the plug. The lower conductive plate of the second conductive element is disposed on one side of the N pole socket and is used to contact the N pole pin of the plug.

4. The plug protective sleeve according to claim 1, characterized in that, The plug protective sleeve also includes a night light fixed to the housing and electrically connected to the first conductive element and the second conductive element respectively.

5. The plug protective sleeve according to claim 1, characterized in that, The plug protective sleeve also includes a circuit board fixed to the housing and electrically connected to the first conductive element and the second conductive element respectively, and a USB interface connected to the circuit board.

6. A plug structure, characterized in that, The device includes a plug and a plug protective sleeve as described in any one of claims 1-5. The plug includes an L-pole pin, an N-pole pin, and a ground pin. The L-pole pin of the plug passes through the L-pole socket and contacts the first conductive element. The N-pole pin of the plug passes through the N-pole socket and contacts the second conductive element. The ground pin of the plug passes through the ground socket.

7. An electrical device, characterized in that, Includes the plug structure as described in claim 6.

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