CN221687911U - Overload prevention device for multi-country power converter - Google Patents

Abstract

The utility model discloses an overload protection device for a multinational power converter, comprising a main body upper cover, a main body lower cover, a US standard plug pin assembly, and a British standard plug pin assembly. A socket hole is formed on the main body upper cover, and also comprises a fuse rack detachably installed in the main body lower cover, a fuse tube installed in the fuse rack, a lower conductive sheet, and an upper conductive sheet; an installation frame is formed in the fuse rack, and the fuse tube is installed in the installation frame; the lower conductive sheet comprises a lower conductive clamping part that can clamp the lower part of the fuse tube for conduction; the British standard plug pin assembly and the US standard plug pin assembly are respectively plugged and connected with the lower conductive sheet; the upper conductive sheet comprises an upper conductive clamping part that can clamp the upper part of the fuse tube for conduction; and the upper conductive sheet is electrically connected to the socket hole. The utility model is easy to pull out and install, has a stable structure after installation, is smooth in conduction and has high safety, effectively protects the circuit of the power converter, prevents circuit overload, and can effectively prevent people from accidentally pulling out the fuse during use, and the product volume can also be made smaller.

Description

An overload protection device for multinational power converters

Technical Field

The utility model relates to the technical field of power converters, and in particular to an overload protection device for multinational power converters.

Background Art

Because the socket standards of each country are not completely unified, one type of 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 causes great trouble for people traveling across borders or on business trips.

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, fuses are installed in some power converters. When the current reaches a certain value, the fuse will blow, thereby protecting the circuit.

The conventional power converter on the market is configured with a socket on the shell, and a conductive terminal is provided on the side wall of the socket to electrically contact and connect with the fuse. During use, leakage is likely to occur, resulting in electric shock, causing safety hazards. At the same time, it also takes up a lot of product space, which is not conducive to miniaturization of the product.

In addition, during the use of the power converter, since some countries have no safety requirements for the outer edge dimensions of the 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 naughty manner during use, there will be a major safety problem and low safety of use.

Utility Model Content

In view of the above-mentioned deficiencies, the purpose of the utility model is to provide an overload protection device for a multinational power converter, which is easy to unplug and install, has a stable structure after installation, smooth conduction and high safety, effectively protects the circuit of the power converter to prevent circuit overload, and can also effectively prevent people from accidentally unplugging the device during use. At the same time, the product size can be made smaller.

The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

An overload protection device for a multi-national power converter comprises a main body upper cover, a main body lower cover covering the main body upper cover, a US standard plug pin assembly arranged between the main body upper cover and the main body lower cover, and a British standard plug pin assembly arranged 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, and further comprises a safety frame detachably installed in the main body lower cover, a fuse tube installed in the safety frame, a lower conductive sheet fixed on the main body lower cover, and an upper conductive sheet fixed between the main body upper cover and the main body lower cover; a mounting frame is formed in the safety frame, and the fuse tube is installed in the mounting frame; the lower conductive sheet comprises a The lower conductive clamping part; the British standard plug pin assembly and the American standard plug pin assembly are respectively plugged and connected with 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 from the mounting plate downward; 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.

As a further improvement of the present invention, 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.

As a further improvement of the utility model, the lower conductive clamping part includes a lower conductive clamping arm that respectively clamps the two sides of the lower part of the fuse tube, 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.

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

As a further improvement of the utility model, the upper conductive clamping portion includes an upper conductive clamping arm which clamps the upper two sides of the fuse tube respectively and extends downward as a whole, and the lower part of the upper conductive clamping arm is formed with at least one upper conductive guide block which extends obliquely downward toward the outside.

As a further improvement of the present utility model, a mounting cover is formed on the lower end surface of the fuse frame, at least one mounting limit portion extends outwardly from the side edge 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 edge of the fuse tube plug hole.

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

As a further improvement of the present invention, at least one group of symmetrically arranged inner limit protrusions are 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.

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.

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 part when the British standard plug pin assembly is pushed out of the lower cover of the main body.

The beneficial effects of the utility model are:

The fuse rack is used to protect and limit the fuse tube. After the fuse rack and the fuse tube are installed in the power converter, the upper conductive clamping part in the upper conductive sheet clamps the upper part of the fuse tube, so that one end of the fuse tube is connected to the live wire at one end of the socket hole of the power converter. The lower conductive clamping part in the lower conductive sheet clamps the lower side of the fuse tube, so that the other end of the fuse tube is connected to the live wire of the US standard plug pin assembly and the British standard plug pin assembly in the power converter. The combination of the two makes the anti-electric shock device conduct smoothly and has high safety, effectively protecting the circuit of the power converter and preventing the circuit from overloading.

The fuse is installed on the fuse plug hole correspondingly, and cooperates with the pull-out and clearance hole on the side of the fuse plug hole, so that the fuse is more convenient when being pulled out and installed.

The above is an overview of the technical solution of the utility model. The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a fuse tube, a fuse frame, an upper conductive sheet, and a lower conductive sheet;

FIG2 is a schematic diagram of the structure of the upper conductive sheet;

FIG3 is a schematic diagram of the structure of the lower conductive sheet;

FIG4 is a schematic diagram of the structure of the safety frame;

FIG5 is a schematic diagram of the structure of a fuse;

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

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

FIG8 is a front view of a power converter;

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

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

FIG11 is a schematic diagram of a U.S. standard pin assembly and a lower conductive sheet;

FIG12 is a schematic diagram of the U.S. standard plug pin assembly being inserted into the lower conductive sheet;

FIG13 is a schematic diagram of a British standard plug pin assembly and a lower conductive sheet;

FIG14 is a schematic diagram of the British standard plug pin assembly being inserted into the lower conductive sheet;

FIG15 is a schematic diagram of Embodiment 2;

In the figure: 1. Main body upper cover; 11. Socket hole; 2. Main body lower cover; 21. Fuse plug hole; 22. Pull-out clearance slot; 3. US standard plug pin assembly; 31. US standard live wire conduction piece; 4. UK standard plug pin assembly; 41. UK standard live wire conduction piece; 5. Fuse rack; 51. Installation frame; 511. Inner limit convex block; 512. Lower limit convex block; 52. Installation cover; 521. Installation limit part; 522. Pull-out guide surface; 6. Fuse tube; 7, lower conductive sheet; 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 sheet; 73, US standard clamping part; 74, UK standard clamping part; 8, upper conductive sheet; 81, upper conductive clamping part; 811, upper conductive clamping arm; 812, upper conductive guide block; 82, upper conductive connecting sheet; 83, socket hole connection clamping part.

DETAILED DESCRIPTION

In order to further explain 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 in conjunction with the accompanying drawings and preferred embodiments.

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, and do not indicate or imply 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 a limitation on the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Embodiment 1

Referring to FIGS. 1 to 14 , an embodiment of the utility model 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 pin assembly 3 disposed between the main body upper cover 1 and the main body lower cover 2, and a British standard plug pin assembly 4 disposed between the main body upper cover 1 and the main body lower cover 2, wherein a socket hole 11 is formed on the main body upper cover 1, and further comprising a fuse frame 5 detachably mounted in the main body lower cover 2, a fuse tube 6 mounted in the fuse frame 5, and a fuse fixed on 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 mounted 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 American standard plug pin assembly 3 are respectively plugged 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.

The fuse frame 5 is used to fix the position of the fuse tube 6, prevent the fuse tube 6 from shifting in the power converter, and is more convenient for the upper conductive sheet 8 and the lower conductive sheet 7 to clamp, ensure that the fuse tube 6 is connected to the live wire on the socket hole 11 and the live wire between the British standard plug pin assembly 4 and the American standard plug pin assembly 3, and improve the safety of the power converter. After the fuse frame 5 and the fuse tube 6 are installed in the power converter through the main body lower cover 2, the upper conductive clamping part 81 of the upper conductive sheet 8 clamps the upper part of the fuse tube 6, so that one end of the fuse tube 6 is electrically connected to the live wire of the multinational plug inserted into the socket hole 11, and the lower conductive clamping part 71 in the lower conductive sheet 7 clamps the lower part of the fuse tube 6, so that the other end of the fuse tube 6 is connected to the live wire pin of the American standard plug pin assembly 3 and the British standard plug pin assembly 4. The combination of the two makes the device conduct smoothly and has high safety, effectively protects the circuit in the power converter, prevents circuit overload, and the product volume can be made smaller.

As for the specific structural arrangement of the lower conductive sheet 7, as shown in Fig. 1, Fig. 3, Fig. 9, Fig. 11 to Fig. 14, the lower conductive sheet 7 also includes a lower conductive connecting sheet 72, a US standard clamping portion 73 provided at one end of the lower conductive connecting sheet 72 and capable of plugging and electrically connecting with the US standard plug pin assembly 3, and a British standard clamping portion 74 provided at the other end of the lower conductive connecting sheet 72 and capable of plugging and electrically connecting with the British standard plug pin assembly 4; the lower conductive clamping portion 71 is provided at the other end of the lower conductive connecting sheet 72. The lower conductive sheet 7 is an integrally formed structure, thereby ensuring the conduction smoothness between the components and improving the 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, and at this time, the US standard plug pin assembly 3 is inserted into the US standard clamping portion 73, so as to achieve a 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, which effectively ensures the safety of the use of the US standard plug pin assembly 3. When the British standard plug assembly 4 is needed, it is only necessary to push the British standard plug assembly 4 out of the main body lower cover 2 from the power converter. At this time, the British standard plug assembly 4 is inserted into the British standard clamping part 74, so as to achieve the conductive connection between the live wire pin on the British standard plug assembly 4 and the fuse 6. When the British standard plug assembly 4 is not needed, the British standard plug assembly 4 is not connected to the British standard clamping part 74, which effectively ensures the safety of the use of the British standard plug assembly 4.

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, in order to avoid the live wire pin in the British standard plug assembly 4, it is made into a bent shape.

As for the specific structural setting of the lower conductive clamping part 71, as shown in FIG. 1 and FIG. 3, the lower conductive clamping part 71 includes a lower conductive clamping arm 711 that clamps the two sides of the lower part of the fuse tube 6 respectively, and the upper end of the lower conductive clamping arm 711 is formed with a lower conductive upper guide block 712 that extends obliquely toward the upper end of the outside, and the lower end of the lower conductive clamping arm 711 is formed with a lower conductive lower guide block 713 that extends obliquely toward the lower end of the outside. The two groups of lower conductive clamping arms 711 clamp the two sides of the lower part of the fuse tube 6 respectively, so as to ensure that the fuse tube 6 is connected to the live wire of the British standard plug pin assembly 4 and the American standard plug pin assembly 3, prevent the fuse tube 6 from shifting during use, and improve the conduction efficiency. When it is necessary to pull out the fuse 6 and the fuse rack 5 from the power converter, the fuse 6 and the fuse rack 5 are more easily and accurately pulled out from the lower conduction clamping portion 71 under the guidance of the lower conduction upper guide block 712, thereby improving the efficiency of pulling out the fuse 6 and the fuse rack 5. After pulling out, the fuse 6 can be freely replaced in the fuse rack 5 for the next use. When it is necessary to install the fuse 6 and the fuse rack 5 into the power converter, the fuse 6 and the fuse rack 5 are more easily and accurately inserted into the lower conduction clamping portion 71 under the guidance of the lower conduction lower guide block 713, so that they are clamped by the lower conduction clamping portion 71 for conduction, completing the installation of the fuse 6, and improving the efficiency of installing the fuse 6 and the fuse rack 5.

As for the specific structural arrangement of the upper conductive sheet 8, as shown in Figures 1, 2, 9 and 10, the upper conductive sheet 8 also includes an upper conductive connecting sheet 82 that is overall in the shape of "∟", and a socket hole 11 connection clamping portion that is arranged at one end of the upper conductive connecting sheet 82 and is electrically connected to the socket hole 11; the upper conductive clamping portion 81 is arranged at the other end of the upper conductive connecting sheet 82. The upper conductive sheet 8 is an integrated structure, thereby ensuring the conduction smoothness between the components and improving the conduction efficiency. The upper conductive connecting sheet 82 is in the shape of "∟", which can effectively reserve a fixed position for the upper conductive sheet 8, making it convenient for screws to fix the upper conductive sheet 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 multi-country power converters). The upper conductive clamping portion 81 is arranged at one end of the upper conductive connecting piece 82 extending upward and extending downward as a whole, so as to clamp the fuse 6. The socket hole 11 connecting clamping portion is arranged at one lateral end of the upper conductive connecting piece 82 and extends upward as a whole, and the corresponding conductive spring corresponding to the socket hole 11 is connected (for example, the patent number is 201621114014.7, and the patent name is a right socket spring assembly in a multi-national power converter, that is, the end of the right socket spring assembly extending downward is inserted into the socket hole 11 connecting clamping portion), thereby realizing the conduction between the multi-national plug inserted into the socket hole 11 and each pin assembly.

For the specific structural setting of the socket hole 11, as shown in Figure 8, reference may be made to patent number 201621114014.7, and the patent name is a multi-country power converter. The structure and related principles of a single socket panel or a combined socket panel are described, so they are not repeated in this embodiment.

As for the specific structural arrangement of the upper conducting clamping part 81, as shown in Fig. 1, Fig. 2, Fig. 9 to Fig. 10, the upper conducting clamping part 81 comprises an upper conducting clamping arm 811 which clamps the upper two sides of the fuse tube 6 and extends downward as a whole, and the lower part of the upper conducting clamping arm 811 is formed with at least one upper conducting guide block 812 which extends obliquely downward toward the outside. The two groups of upper conducting clamping arms 811 clamp the upper part of the fuse tube 6, so that the connection between the fuse tube 6 and the live wire on the socket hole 11 in the power converter is conducted. 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 conduction guide block 812, and the fuse tube 6 is inserted into the upper conduction clamping arm 811 under the guidance of the upper conduction guide block 812, so that the fuse tube 6 can be inserted into the upper conduction clamping portion 81 more easily and accurately to prevent displacement, and is clamped by the upper conduction clamping portion 81 for conduction, thereby completing the installation of the fuse tube 6 and improving the efficiency of installation.

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.

As for the specific way of installing the fuse rack 5 and the fuse tube 6 in the power converter, as shown in FIG1, FIG4, FIG6 to FIG7, a mounting cover 52 is formed on the lower end surface of the fuse rack 5, at least one mounting limit portion 521 is extended outwardly from the side of the mounting cover 52, and a withdrawal guide surface 522 is formed on the upper end surface of the mounting limit portion 521, which extends obliquely outward and downward from the mounting plate; a fuse tube insertion hole 21 matching the mounting cover 52 and the mounting limit portion 521 is formed on the main body lower cover 2, and at least one withdrawal clearance groove 22 is recessed on the side of the fuse tube insertion hole 21. The fuse rack 5 and the fuse tube 6 are inserted into the power converter through the fuse tube insertion hole 21, and the mounting limit portion 521 is pressed against the side of the fuse tube insertion hole 21, thereby preventing the fuse tube 6 from being excessively inserted into the power converter. When the fuse tube 6 needs to be pulled out, one only needs to insert a hand or an object between the extraction clearance 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.

As shown in FIG. 4 and FIG. 5 , the installation frame 51 is rectangular or arc-shaped as a whole. The specific selection can be made according to the actual situation. In the present embodiment, a rectangular shape is selected to match the fuse 6 .

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 convexly provided 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 convexly provided at both 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 allows the fuse 6 to be stably fixed in the installation frame 51 and is not easy to shift, so that the device can be smoothly turned on and has high safety, effectively protecting the circuit in the power converter to prevent circuit overload.

As for the specific plug-in mode 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 an 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 connected with the lower conductive piece 7, the lower conductive piece 7 is connected with the fuse 6, the upper end of the fuse 6 is connected with the upper conductive piece 8, and the upper conductive piece 8 is 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 connected with the conductive spring piece. The entire conductive structure is complete and the conductive 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 and conductive with 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 of the second pin and its use are far away, so they are not repeated in this embodiment.

As for the specific plug-in mode of the British standard plug pin assembly 4 and the lower conductive piece 7, as shown in Figures 13 and 14, a British standard live wire conductive piece 41 is provided on the British standard plug pin assembly 4, and 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, so that the British standard plug pin assembly 4 is connected with the lower conductive piece 7, the lower conductive piece 7 is connected with the fuse 6, the upper end of the fuse 6 is connected with the upper conductive piece 8, and the upper conductive piece 8 is 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 connected with the conductive spring piece. The entire conductive structure is complete and the conductive structure is smooth. When it is not needed, 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 and conductive with the external plug, thereby improving the safety of the power converter. For the specific structural setting of the British standard plug assembly 4, please refer to patent number 202010597132.2, and the patent name is a multi-way sliding small plug. The structure of the second pin and its use are described in detail, so they will not be repeated in this embodiment.

Embodiment 2

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 structure is not repeated in this embodiment.

As shown in FIG15 , the main difference between the second embodiment and the first embodiment is that the socket hole 11 in the present embodiment is a German-style socket panel, thereby meeting people's needs for different sockets in different situations, improving the practicality of the device, and expanding the scope of application of the device. The German-style socket panel is a standard panel, so it is not described in detail in the present embodiment.

It should be noted that the overload protection device for multinational power converter disclosed in the utility model is an improvement on the specific structure, and the specific control method is not the innovation point of the utility model. The fuse, conductive spring and other components involved in the utility model can be universal standard parts or components known to those skilled in the art, and their structure, principle and control method are all known to those skilled in the art through technical manuals or conventional experimental methods.

The above description is only 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 embodiments of the present invention are within the protection scope of the present invention.

Claims (8)

1. The utility model provides an overload protection device for multinational power converter, includes a main part upper cover, lid in a main part lower cover on the main part upper cover, set up a American standard pin subassembly between main part upper cover and main part lower cover, and set up a standard pin subassembly between main part upper cover and main part lower cover, cover on the main part and be formed with at least one socket hole, its characterized in that: the safety device also comprises a safety frame detachably arranged in the main body lower cover, a safety tube arranged in the safety frame, a lower conducting piece fixed on the main body lower cover, and an upper conducting piece fixed between the main body upper cover and the main body lower cover; a mounting frame is formed in the safety frame, and the safety tube is mounted in the mounting frame; the lower conducting piece comprises a lower conducting clamping part which can clamp and conduct the lower part of the protective tube; the English pin assembly and the American pin assembly are respectively connected with the lower conducting piece in an inserting way; the upper conducting piece comprises an upper conducting clamping part which can clamp and conduct the upper part of the protective tube; the upper conducting plate is electrically connected with the socket hole; a mounting cover is formed on the lower end surface of the safety frame, at least one mounting limit part extends outwards from the side edge of the mounting cover, and a pull-out guide surface extending obliquely outwards and downwards from the mounting plate is formed on the upper end surface of the mounting limit part; a safety tube jack matched with the mounting cover and the mounting limiting part is formed in the lower cover of the main body, and at least one pull-out abdication groove is concavely formed in the side edge of the safety tube jack; the whole mounting frame is rectangular or circular arc.

2. The overload prevention device for a multinational power converter of claim 1, wherein: the lower conducting piece further comprises a lower conducting connecting piece, a American standard clamping part which is arranged at one end of the lower conducting connecting piece and can be electrically connected with the American standard pin assembly in an inserting way, and an English standard clamping part which is arranged at the other end of the lower conducting connecting piece and can be electrically connected with the English standard pin assembly in an inserting way; the lower conduction clamping part is arranged at the other end of the lower conduction connecting sheet.

3. The overload prevention device for a multinational power converter of claim 1, wherein: the lower conduction clamping part comprises lower conduction clamping arms which clamp two sides of the lower part of the protective tube respectively, a lower conduction upper guide block which extends obliquely towards the outer upper end is formed at the upper end of the lower conduction clamping arms, and a lower conduction lower guide block which extends obliquely towards the outer lower end is formed at the lower end of the lower conduction clamping arms.

4. The overload prevention device for a multinational power converter of claim 1, wherein: the upper conducting piece further comprises an upper conducting connecting piece which is L-shaped integrally and a socket hole connecting clamping part which is arranged at one end of the upper conducting connecting piece and is electrically connected with the socket hole; the upper conduction clamping part is arranged at the other end of the upper conduction connecting sheet.

5. The overload prevention device for a multinational power converter of claim 1, wherein: the upper conduction clamping part comprises an upper conduction clamping arm which clamps two sides of the upper part of the protective tube respectively and extends downwards integrally, and at least one upper conduction guide block which extends obliquely towards the lower part of the outer part is formed at the lower part of the upper conduction clamping arm.

6. The overload prevention device for a multinational power converter of claim 1, wherein: at least one group of inner limit lugs which are symmetrically arranged are convexly arranged on the inner wall of the mounting frame, and the side edge of the protective tube is propped against the inner limit lugs; and two ends of the outer side of the lower part of the mounting frame are respectively provided with a lower limit bump in a protruding mode, and the lower end of the protective tube is propped against the lower limit bump.

7. The overload prevention device for a multinational power converter as claimed in claim 2, wherein: the American gauge pin assembly is provided with a American gauge fire wire conducting piece, and the American gauge fire wire conducting piece is inserted into the American gauge clamping part when the American gauge pin assembly is pushed out of the lower cover of the main body.

8. The overload prevention device for a multinational power converter as claimed in claim 2, wherein: and the English pin assembly is provided with an English live wire conducting piece, and the English live wire conducting piece is inserted into the English clamping part when the English pin assembly is pushed out of the lower cover of the main body.