Overload protection device for multi-country power adapters

Abstract

Disclosed in the present invention is an overload protection device for multi-country power adapters. The overload protection device comprises a main body upper cover, a main body lower cover, an American-standard pin assembly and a British-standard pin assembly, wherein a socket hole is formed in the main body upper cover. The overload protection device further comprises a fuse holder detachably mounted in the main body lower cover, a fuse mounted in the fuse holder, a lower conductive piece and an upper conductive piece, wherein a mounting frame is formed in the fuse holder; the fuse is mounted in the mounting frame; the lower conductive piece comprises a lower conductive clamping portion capable of clamping a lower portion of the fuse for conduction; the British-standard pin assembly and the American-standard pin assembly are respectively inserted into the lower conductive piece; the upper conductive piece comprises an upper conductive clamping portion capable of clamping an upper portion of the fuse for conduction; and the upper conductive piece is electrically connected to the socket hole. The present invention is convenient to pull out and mount, has a stable structure after being mounted, is smoothly conductive, has high safety, effectively protects a circuit of a power adapter, prevents circuit overload, and can also effectively prevent people from unplugging the present invention accidentally during use. The product size can also be made to be smaller.

Description

An overload protection device for multinational power converters Technical Field

[0001] The present invention relates to the technical field of power converters, and in particular to an overload protection device for multinational power converters. Background Art

[0002] Because the socket standards of each country are not completely unified, one plug cannot be used worldwide. When traveling to different countries, you need to configure the corresponding plugs for that country to power the electronic devices you carry with you. If you travel to several countries at a time, consumers have to bring power plugs for several countries, which brings great trouble to people traveling internationally or on business trips.

[0003] Therefore, power converters that are suitable for socket standards in different countries are widely available on the market. In order to improve the safety performance of these power converters, some power converters are equipped with fuses. When the current reaches a certain value, the fuse will blow, thereby protecting the circuit.

[0004] Conventional power converters on the market are configured with a socket on the housing, and conductive terminals are provided on the side walls of the socket to electrically connect to the fuse. This can easily cause leakage during use, leading to electric shock and posing a safety hazard. It also takes up a lot of product space, hindering product miniaturization.

[0005] In addition, during the use of the power converter, since some countries have no safety regulations for the outer edge dimensions of sockets, there are many sockets on the market with relatively small edge dimensions. When the plugs are pushed out for use, if the fuse is not completely placed within the contact surface between the plug and the socket, there is a risk of the fuse being pulled out, resulting in safety hazards such as leakage and electric shock. In particular, if children pull out the fuse in a playful manner during use, there will be a major safety problem and low safety of use. Summary of the Invention

[0006] In response to the above-mentioned shortcomings, the present invention aims to provide an overload protection device for a multinational power converter. The device is easy to remove and install, has a stable structure after installation, conducts smoothly, and is highly safe. It effectively protects the power converter's circuit from overload and prevents accidental removal during use. Furthermore, the device can be made more compact.

[0007] The technical solution adopted by the present invention to achieve the above-mentioned object is:

[0008] An overload protection device for a multinational power converter includes a main body upper cover, a main body lower cover covering the main body upper cover, a US standard plug pin assembly disposed between the main body upper cover and the main body lower cover, and a UK standard plug pin assembly disposed between the main body upper cover and the main body lower cover. The main body upper cover is formed with at least one socket hole. The device also includes a fuse rack detachably mounted within the main body lower cover, a fuse tube mounted within the fuse rack, a lower conductive piece fixed to the main body lower cover, and an upper conductive piece fixed between the main body upper cover and the main body lower cover. The fuse rack is formed with a mounting frame, and the fuse tube is mounted within the mounting frame. The lower conductive piece includes a clamp that can clamp the lower portion of the fuse tube for conduction. Lower conductive clamping part; the British standard plug pin assembly and the American standard plug pin assembly are respectively plugged into the lower conductive piece; the upper conductive piece includes an upper conductive clamping part that can clamp the upper part of the fuse for conduction; the upper conductive piece is electrically connected to the socket hole; a mounting cover is formed on the lower end surface of the fuse frame, and at least one mounting limit portion extends outward from the side of the mounting cover, and a pull-out guide surface is formed on the upper end surface of the mounting limit portion that extends obliquely outward and downward from the mounting plate; a fuse tube socket matching the mounting cover and the mounting limit portion is provided on the lower cover of the main body, and at least one pull-out clearance groove is recessed on the side of the fuse tube socket; the mounting frame is rectangular or arc-shaped as a whole.

[0009] As a further improvement of the present invention, the lower conductive piece also includes a lower conductive connecting piece, a US-standard clamping portion arranged at one end of the lower conductive connecting piece and capable of being plugged and electrically connected to the US-standard plug pin assembly, and a British-standard clamping portion arranged at the other end of the lower conductive connecting piece and capable of being plugged and electrically connected to the British-standard plug pin assembly; the lower conductive clamping portion is arranged at the other end of the lower conductive connecting piece.

[0010] As a further improvement of the present invention, the lower conductive clamping portion includes a lower conductive clamping arm that clamps the two sides of the lower part of the fuse tube respectively, and the upper end of the lower conductive clamping arm is formed with a lower conductive upper guide block that extends obliquely toward the external upper end, and the lower end of the lower conductive clamping arm is formed with a lower conductive lower guide block that extends obliquely toward the external lower end.

[0011] As a further improvement of the present invention, the upper conductive piece also includes an upper conductive connecting piece that is overall in the shape of "∟", and a socket hole connecting clamping portion arranged at one end of the upper conductive connecting piece and electrically connected to the socket hole; the upper conductive clamping portion is arranged at the other end of the upper conductive connecting piece.

[0012] As a further improvement of the present invention, the upper conductive clamping portion includes an upper conductive clamping arm that clamps both sides of the upper part of the fuse and extends downward as a whole. The lower part of the upper conductive clamping arm is formed with at least one upper conductive guide block that extends obliquely downward toward the outside.

[0013] As a further improvement of the present invention, a mounting cover is formed on the lower end surface of the fuse frame, at least one mounting limit portion is extended outward from the side of the mounting cover, and a pull-out guide surface is formed on the upper end surface of the mounting limit portion and extends obliquely outward and downward from the mounting plate; a fuse tube insertion hole matching the mounting cover and the mounting limit portion is provided on the lower cover of the main body, and at least one pull-out clearance groove is recessed on the side of the fuse tube insertion hole.

[0014] As a further improvement of the present invention, the installation frame is overall rectangular or arc-shaped.

[0015] As a further improvement of the present invention, at least one group of symmetrically arranged inner limit protrusions is protruded on the inner wall of the installation frame, and the side edges of the fuse tube are pressed against the inner limit protrusions; lower limit protrusions are respectively protruded on the two ends of the lower outer side of the installation frame, and the lower end of the fuse tube is pressed against the lower limit protrusions.

[0016] As a further improvement of the present invention, a US-standard live wire conducting piece is provided on the US-standard plug pin assembly, and the US-standard live wire conducting piece is inserted into the US-standard clamping part when the US-standard plug pin assembly is pushed out of the lower cover of the main body.

[0017] As a further improvement of the present invention, a British standard live wire conducting piece is provided on the British standard plug pin assembly, and the British standard live wire conducting piece is inserted into the British standard clamping portion when the British standard plug pin assembly is pushed out of the lower cover of the main body.

[0018] The beneficial effects of the present invention are:

[0019] The fuse holder is used to protect and position the fuse. After the fuse holder and fuse are installed in the power converter, the upper conductive clamping portion of the upper conductive sheet clamps the upper portion of the fuse, thereby connecting one end of the fuse to the live wire at one end of the power converter's socket. The lower conductive clamping portion of the lower conductive sheet clamps the lower side of the fuse, thereby connecting the other end of the fuse to the live wires of the US and UK standard plug pin assemblies in the power converter. The combination of the two ensures smooth and safe conduction of the anti-electric shock device, effectively protecting the power converter's circuit and preventing circuit overload.

[0020] The fuse is correspondingly installed on the fuse socket and cooperates with the extraction and clearance hole on the side of the fuse socket, so that the fuse is more convenient to extract and install.

[0021] The above is an overview of the technical solution of the invention. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a fuse tube, a fuse frame, an upper conductive sheet, and a lower conductive sheet;

[0024] FIG2 is a schematic structural diagram of the upper conductive sheet;

[0025] FIG3 is a schematic structural diagram of the lower conductive sheet;

[0026] Figure 4 is a schematic structural diagram of a safety frame;

[0027] Figure 5 is a schematic structural diagram of a fuse;

[0028] FIG6 is a schematic diagram of the back side of the power converter;

[0029] FIG7 is a schematic diagram of the back of the power converter with the fuse and fuse holder removed;

[0030] FIG8 is a front view of a power converter;

[0031] FIG9 is a schematic diagram of the internal structure of a power converter;

[0032] FIG10 is a schematic diagram showing the connection between the conductive spring and the upper conductive sheet;

[0033] FIG11 is a schematic diagram of the US standard pin assembly and the lower conductive sheet;

[0034] FIG12 is a schematic diagram of the U.S. standard plug assembly inserted into the lower conductive sheet;

[0035] FIG13 is a schematic diagram of the UK standard plug pin assembly and the lower conductive sheet;

[0036] FIG14 is a schematic diagram of the British standard plug assembly inserted into the lower conductive piece;

[0037] In the figure: 1. Main body upper cover; 11. Socket hole; 2. Main body lower cover; 21. Fuse jack; 22. Pull-out clearance slot; 3. US standard plug assembly; 31. US standard live wire conductor; 4. UK standard plug assembly; 41. UK standard live wire conductor; 5. Fuse holder; 51. Mounting frame; 511. Inner limit block; 512. Lower limit block; 52. Mounting cover; 521. Mounting limiter; 522. Pull-out guide surface; 6. Fuse; 7. Lower conductive piece; 71. Lower conductive clamping part; 711. Lower conductive clamping arm; 712. Lower conductive upper guide block; 713. Lower conductive lower guide block; 72. Lower conductive connecting piece; 73. US standard clamping part; 74. UK standard clamping part; 8. Upper conductive piece; 81. Upper conductive clamping part; 811. Upper conductive clamping arm; 812. Upper conductive guide block; 82. Upper conductive connecting piece; 83. Socket hole connecting clamping part.

[0038] DETAILED DESCRIPTION

[0039] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0042] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0043] Example 1

[0044] 1 to 14 , an embodiment of the present invention provides an overload protection device for a multinational power converter, comprising a main body upper cover 1, a main body lower cover 2 covering the main body upper cover 1, a US standard plug assembly 3 disposed between the main body upper cover 1 and the main body lower cover 2, and a UK standard plug assembly 4 disposed between the main body upper cover 1 and the main body lower cover 2. The main body upper cover 1 is formed with a socket hole 11, and further comprising a fuse rack 5 detachably mounted within the main body lower cover 2, a fuse tube 6 mounted within the fuse rack 5, and a fixed to the main body lower cover 2. A lower conductive piece 7 and an upper conductive piece 8 fixed between the main body upper cover 1 and the main body lower cover 2; a mounting frame 51 is formed in the fuse frame 5, and the fuse tube 6 is installed in the mounting frame 51; the lower conductive piece 7 includes a lower conductive clamping portion 71 that can clamp the lower part of the fuse tube 6 for conduction; the British standard plug pin assembly 4 and the US standard plug pin assembly 3 are respectively plugged into and connected with the lower conductive piece 7; the upper conductive piece 8 includes an upper conductive clamping portion 81 that can clamp the upper part of the fuse tube 6 for conduction; the upper conductive piece 8 is electrically connected to the socket hole 11.

[0045] The fuse holder 5 is used to secure the position of the fuse 6, preventing it from shifting within the power converter. It also facilitates the clamping of the upper conductive plate 8 and the lower conductive plate 7, ensuring electrical continuity between the fuse 6 and the live wire on the socket 11, as well as between the UK standard plug assembly 4 and the US standard plug assembly 3, thereby improving the safety of the power converter. After the fuse holder 5 and the fuse 6 are installed within the power converter through the main body lower cover 2, the upper conductive clamping portion 81 of the upper conductive plate 8 clamps the upper portion of the fuse 6, thereby electrically connecting one end of the fuse 6 to the live wire of the multinational plug inserted into the socket 11. The lower conductive clamping portion 71 of the lower conductive plate 7 clamps the lower portion of the fuse 6, thereby connecting the other end of the fuse 6 to the live wire pins of the US standard plug assembly 3 and the UK standard plug assembly 4. These two combined features ensure smooth conduction and high safety, effectively protecting the circuits in the power converter from overloads while also allowing for a more compact product.

[0046] The specific structure of the lower conductive sheet 7, as shown in Figures 1, 3, 9, and 11 to 14, includes a lower conductive connecting sheet 72, a US-standard clamping portion 73 disposed at one end of the lower conductive connecting sheet 72 and capable of plugging and electrically connecting to the US-standard plug pin assembly 3, and a UK-standard clamping portion 74 disposed at the other end of the lower conductive connecting sheet 72 and capable of plugging and electrically connecting to the UK-standard plug pin assembly 4. The lower conductive clamping portion 71 is disposed at the other end of the lower conductive connecting sheet 72. The lower conductive sheet 7 is an integrally formed structure, thereby ensuring smooth conduction between the various components and improving conduction efficiency. One end of the lower conductive connecting piece 72 extends upward and is connected to the lower end of the lower conductive clamping portion 71, and the other end is formed with a US standard clamping portion 73 and a British standard clamping portion 74. When the US standard plug pin assembly 3 is needed, it is only necessary to push the US standard plug pin assembly 3 out of the main body lower cover 2 from the power converter. At this time, the US standard plug pin assembly 3 is inserted into the US standard clamping portion 73, thereby realizing the conductive connection between the live wire pin on the US standard plug pin assembly 3 and the fuse 6. When the US standard plug pin assembly 3 is not needed, the US standard plug pin assembly 3 is not connected to the US standard clamping portion 73, effectively ensuring the safety of the use of the US standard plug pin assembly 3. When the British standard plug pin assembly 4 is needed, it is only necessary to push the British standard plug pin assembly 4 out of the main body lower cover 2 from the power converter. At this time, the British standard plug pin assembly 4 is inserted into the British standard clamping part 74, thereby realizing the conductive connection between the live wire pin on the British standard plug pin assembly 4 and the fuse 6. When the British standard plug pin assembly 4 is not needed, the British standard plug pin assembly 4 is not connected to the British standard clamping part 74, effectively ensuring the safety of the use of the British standard plug pin assembly 4.

[0047] Regarding the specific structural setting of the lower conductive connecting piece 72, as shown in Figures 1 and 3, the shape of the lower conductive connecting piece 72 can be set according to actual needs. For example, in this embodiment, it is made into a bent shape to avoid the live wire pin in the British standard plug assembly 4.

[0048] As shown in Figures 1 and 3 , the lower conductive clamping portion 71 comprises lower conductive clamping arms 711 that respectively clamp the two sides of the lower portion of the fuse 6. The upper ends of the lower conductive clamping arms 711 are formed with lower conductive upper guide blocks 712 that extend obliquely toward the upper end of the outer portion, and the lower ends of the lower conductive clamping arms 711 are formed with lower conductive lower guide blocks 713 that extend obliquely toward the lower end of the outer portion. The two sets of lower conductive clamping arms 711 respectively clamp the two sides of the lower portion of the fuse 6, thereby ensuring that the fuse 6 is connected to the live wires of the UK standard plug assembly 4 and the US standard plug assembly 3, preventing the fuse 6 from shifting during use and improving conduction efficiency. When the fuse 6 and the fuse holder 5 need to be removed from the power converter, the fuse 6 and the fuse holder 5 are more easily and accurately removed from the lower conductive clamping portion 71 under the guidance of the lower conductive upper guide block 712, thereby improving the efficiency of removing the fuse 6 and the fuse holder 5. After removal, the fuse 6 can be freely replaced in the fuse holder 5 for the next use. When the fuse 6 and the fuse holder 5 need to be installed into the power converter, the fuse 6 and the fuse holder 5 are more easily and accurately inserted into the lower conductive clamping portion 71 under the guidance of the lower conductive lower guide block 713, thereby being clamped by the lower conductive clamping portion 71 for conduction, completing the installation of the fuse 6 and improving the efficiency of installing the fuse 6 and the fuse holder 5.

[0049] As for the specific structural arrangement of the upper conductive piece 8, as shown in Figures 1, 2, 9 to 10, the upper conductive piece 8 also includes an upper conductive connecting piece 82 that is overall in the shape of "∟", a socket hole 11 connection clamping portion that is provided at one end of the upper conductive connecting piece 82 and is electrically connected to the socket hole 11; the upper conductive clamping portion 81 is provided at the other end of the upper conductive connecting piece 82. The upper conductive piece 8 is an integrally formed structure, thereby ensuring smooth conduction between the various components and improving conduction efficiency. The upper conductive connecting piece 82 is in the shape of "∟", which can effectively reserve a fixed position for the upper conductive piece 8, making it easier for screws to fix the upper conductive piece 8 to the internal parts of the power converter (such as fixed on the lower end surface of the bracket in the patent number 202021218777.2, which is a single-insert protection door assembly for a multi-national power converter). The upper conductive clamping portion 81 is provided at one end of the upper conductive connecting piece 82 extending upward and extending downward as a whole, thereby clamping the fuse 6. The socket hole 11 connection clamping portion is provided at one lateral end of the upper conductive connecting piece 82 and extends upward as a whole, and connects the corresponding conductive spring piece corresponding to the socket hole 11 (for example, patent number 201621114014.7, patent name is a right socket spring piece assembly in a multi-national power converter, that is, the downward extending end of the right socket spring piece assembly is inserted into the socket hole 11 connection clamping portion), thereby realizing conduction between the multi-national plug inserted into the socket hole 11 and each pin assembly.

[0050] For the specific structural setting of the socket hole 11, as shown in Figure 8, reference can be made to patent number 201621114014.7, and the patent name is a multi-national power converter. The description of the structure and related principles of a single socket panel or a combined socket panel is not repeated in this embodiment.

[0051] The specific structure of the upper conductive clamping portion 81, as shown in Figures 1, 2, 9, and 10, includes upper conductive clamping arms 811 that respectively clamp the upper sides of the fuse 6 and extend downward as a whole. The lower portions of the upper conductive clamping arms 811 are formed with at least one upper conductive guide block 812 that extends downward and outward at an angle. The two sets of upper conductive clamping arms 811 clamp the upper portion of the fuse 6, thereby ensuring electrical connection between the fuse 6 and the live wire on the socket 11 within the power converter. When the fuse tube 6 and the fuse frame 5 need to be installed, the upper end of the fuse tube 6 first contacts the upper conductive guide block 812. Under the guidance of the upper conductive guide block 812, the fuse tube 6 is inserted into the upper conductive clamping arm 811, so that the fuse tube 6 can be inserted into the upper conductive clamping portion 81 more easily and accurately to prevent displacement, and is clamped by the upper conductive clamping portion 81 for conduction, thereby completing the installation of the fuse tube 6 and improving the efficiency of installation.

[0052] Specifically, as shown in Figures 1 and 2, an upper conductive guide block 812 is formed on both sides of the lower part of the upper conductive clamping arm 811. A total of four upper conductive guide blocks 812 guide the four corners of the fuse 6, so that the fuse 6 can be more accurately inserted into the middle of the upper conductive clamping part 81 to complete the conductive connection.

[0053] Regarding the specific method of installing the fuse holder 5 and the fuse tube 6 within the power converter, as shown in Figures 1, 4, 6, and 7, the fuse holder 5 has a mounting cover 52 formed on its lower end surface. The mounting cover 52 has at least one mounting stop 521 extending outward from its side edge. The mounting stop 521 has a removal guide surface 522 formed on its upper end surface, extending obliquely outward and downward from the mounting plate. The main body lower cover 2 has a fuse tube insertion hole 21 formed therein to match the mounting cover 52 and the mounting stop 521. The side edge of the fuse tube insertion hole 21 has at least one removal clearance groove 22 recessed therein. The fuse holder 5 and the fuse tube 6 are inserted into the power converter through the fuse tube insertion hole 21. The mounting stop 521 presses against the side edge of the fuse tube insertion hole 21, thereby preventing the fuse tube 6 from being over-inserted into the power converter. When it is necessary to pull out the fuse tube 6, one only needs to insert one's hand or an object between the extraction groove 22 and the extraction guide surface 522, and then lift the installation limit portion 521 along the extension direction of the extraction guide surface 522, so as to pull out the fuse frame 5 and the fuse tube 6 installed in the fuse frame 5. The whole process is simple and convenient, and the extraction efficiency is improved.

[0054] As shown in FIG4 and FIG5 , the mounting frame 51 is rectangular or arc-shaped as a whole. The specific selection can be made according to actual conditions. In this embodiment, a rectangular shape is selected to match the fuse 6 .

[0055] As for the specific method of installing the fuse 6 in the installation frame 51, as shown in Figure 4, at least one group of symmetrically arranged inner limit protrusions 511 are protruded on the inner wall of the installation frame 51, and the side edges of the fuse 6 are pressed against the inner limit protrusions 511; lower limit protrusions 512 are respectively protruded on the two ends of the lower outer side of the installation frame 51, and the lower end of the fuse 6 is pressed against the lower limit protrusions 512. The combination of the two ensures that the fuse 6 is stably fixed in the installation frame 51 and is not easily displaced, so that the device can be smoothly conducted and highly safe, effectively protecting the circuit in the power converter and preventing circuit overload.

[0056] As for the specific plug-in method of the US-standard plug pin assembly 3 and the lower conductive piece 7, as shown in Figures 11 to 12, the US-standard plug pin assembly 3 is provided with a US-standard live wire conductive piece 31, and the US-standard live wire conductive piece 31 is inserted into the US-standard clamping portion 73 when the US-standard plug pin assembly 3 is pushed out of the main body lower cover 2, so that the US-standard plug pin assembly 3 is conductively connected with the lower conductive piece 7, the lower conductive piece 7 is conductively connected with the fuse 6, the upper end of the fuse 6 is conductively connected with the upper conductive piece 8, and the upper conductive piece 8 is conductively connected with the conductive spring piece on the bracket. After the multinational plug that needs to be converted is inserted into the socket hole 11, it is conductively connected with the conductive spring piece. The entire conductive structure is complete and the conductive structure is smooth. When it is not needed, the US-standard live wire conductive piece 31 is away from the US-standard clamping portion 73, thereby ensuring that the US-standard live wire conductive piece 31 is connected to the external plug, thereby improving the safety of the power converter. For the specific structural setting of the US-standard pin assembly 3, please refer to patent number 202010597132.2, and the patent name is a multi-way sliding small plug. The structure and use of the second pin are not described in detail in this embodiment.

[0057] As for the specific plug-in method of the British standard plug pin assembly 4 and the lower conductive piece 7, as shown in Figures 13 and 14, the British standard plug pin assembly 4 is provided with a British standard live wire conductive piece 41. The British standard live wire conductive piece 41 is inserted into the British standard clamping portion 74 when the British standard plug pin assembly 4 is pushed out of the main body lower cover 2, thereby making the British standard plug pin assembly 4 conductively connected to the lower conductive piece 7, the lower conductive piece 7 and the fuse 6 conductive, the upper end of the fuse 6 conductive with the upper conductive piece 8 conductive, the upper conductive piece 8 and the conductive spring on the bracket conductive, the multinational plug that needs to be converted is inserted into the socket hole 11 and then conductive, the entire conductive structure is complete and the conductive is smooth. When not in use, the British standard live wire conductive piece 41 is away from the British standard clamping portion 74, thereby ensuring that the British standard live wire conductive piece 41 is connected to the external plug, thereby improving the safety of the power converter. For the specific structural setting of the British standard pin assembly 4, please refer to patent number 202010597132.2, and the patent name is a multi-way sliding small plug. The structure and use of the second pin are not described in detail in this embodiment.

[0058] Example 2

[0059] In the first embodiment, the structure of the overload protection device is described. In this embodiment, the differences from other embodiments are mainly described, and the same structures are not repeated in this embodiment.

[0060] The main difference between the second embodiment and the first embodiment is that the socket hole 11 in this embodiment is a German-style socket panel, which satisfies people's needs for different sockets in different situations, improves the practicality of the device, and expands the scope of application of the device. The German-style socket panel is a standard panel, so it is not described in detail in this embodiment.

[0061] It should be noted that the overload protection device for a multinational power converter disclosed in this invention is an improvement to its specific structure, and the specific control method is not the innovation of this invention. The fuse, conductive spring, and other components involved in this invention can be commonly used standard parts or components known to those skilled in the art. Their structure, principles, and control methods are all known to those skilled in the art through technical manuals or routine experimental methods.

[0062] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as the above-mentioned embodiments of the present invention are within the scope of protection of the present invention.

Claims

1. An overload protection device for a multi-country power converter, comprising a main body upper cover, a main body lower cover covering the main body upper cover, a US standard plug pin assembly disposed between the main body upper cover and the main body lower cover, and a British standard plug pin assembly disposed between the main body upper cover and the main body lower cover, wherein at least one socket hole is formed on the main body upper cover, characterized in that: The invention also comprises a fuse rack detachably mounted in the lower cover of the main body, a fuse tube mounted in the fuse rack, a lower conductive sheet fixed on the lower cover of the main body, and an upper conductive sheet fixed between the upper cover of the main body and the lower cover of the main body; a mounting frame is formed in the fuse rack, and the fuse tube is mounted in the mounting frame; the lower conductive sheet comprises a lower conductive clamping portion that can clamp the lower part of the fuse tube for conducting; the British standard plug pin assembly and the American standard plug pin assembly are respectively plugged and connected with the lower conductive sheet; the upper conductive sheet comprises a lower conductive clamping portion that can clamp the upper part of the fuse tube An upper conducting clamping portion for holding conduction; the upper conducting piece is electrically connected to the socket hole; a mounting cover is formed on the lower end surface of the fuse frame, at least one mounting limit portion is extended outwardly from the side of the mounting cover, and a pull-out guide surface is formed on the upper end surface of the mounting limit portion and extends obliquely outward and downward from the mounting plate; a fuse tube plug hole matching the mounting cover and the mounting limit portion is formed on the lower cover of the main body, and at least one pull-out clearance groove is recessed on the side of the fuse tube plug hole; the mounting frame is rectangular or arc-shaped as a whole.

2. The overload protection device for a multi-country power converter according to claim 1, characterized in that: The lower conductive sheet also includes a lower conductive connecting sheet, a US standard clamping portion arranged at one end of the lower conductive connecting sheet and capable of being plugged and electrically connected to a US standard plug pin assembly, and a British standard clamping portion arranged at the other end of the lower conductive connecting sheet and capable of being plugged and electrically connected to a British standard plug pin assembly; the lower conductive clamping portion is arranged at the other end of the lower conductive connecting sheet.

3. The overload protection device for a multi-country power converter according to claim 1, characterized in that: The lower conductive clamping part includes a lower conductive clamping arm that clamps the two sides of the lower part of the fuse tube respectively, the upper end of the lower conductive clamping arm is formed with a lower conductive upper guide block that extends obliquely toward the external upper end, and the lower end of the lower conductive clamping arm is formed with a lower conductive lower guide block that extends obliquely toward the external lower end.

4. The overload protection device for a multi-country power converter according to claim 1, characterized in that: The upper conductive sheet also includes an upper conductive connecting sheet in the shape of "∟" as a whole, and a socket hole connecting clamping portion arranged at one end of the upper conductive connecting sheet and electrically connected to the socket hole; the upper conductive clamping portion is arranged at the other end of the upper conductive connecting sheet.

5. The overload protection device for a multi-country power converter according to claim 1, characterized in that: The upper conducting clamping part comprises an upper conducting clamping arm which clamps both sides of the upper part of the fuse tube respectively and extends downward as a whole. The lower part of the upper conducting clamping arm is formed with at least one upper conducting guide block which extends obliquely downward toward the outside.

6. The overload protection device for a multi-country power converter according to claim 1, characterized in that: At least one group of symmetrically arranged inner limit protrusions is protruded on the inner wall of the installation frame, and the side edges of the fuse tube are pressed against the inner limit protrusions; lower limit protrusions are respectively protruded on the two ends of the lower outer side of the installation frame, and the lower end of the fuse tube is pressed against the lower limit protrusions.

7. The overload protection device for a multi-country power converter according to claim 2, characterized in that: The US standard plug pin assembly is provided with a US standard live wire conducting piece, and the US standard live wire conducting piece is inserted into the US standard clamping part when the US standard plug pin assembly is pushed out of the main body lower cover.

8. The overload protection device for a multi-country power converter according to claim 2, characterized in that: The British standard plug pin assembly is provided with a British standard live wire conducting piece, and the British standard live wire conducting piece is inserted into the British standard clamping part when the British standard plug pin assembly is pushed out of the main body lower cover.

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