A charging in-line USB connector

Abstract

The utility model belongs to the technical field of USB connector, especially, relate to a charging straight -in formula USB connector, including casing, plug in the mechanism, take power mechanism, USB charging mechanism, circuit mainboard and mainboard seat. USB charging mechanism includes USB joint and charging circuit board. Take power mechanism includes take power seat, first -level take power subassembly, second -level take power subassembly and third -level take power subassembly. The charging straight -in formula USB connector provided by the application through integration plug in the mechanism, take power mechanism and USB charging mechanism, not only can through USB charging mechanism for the electronic equipment with USB joint charges, still can through take power mechanism for the equipment with metal insert piece plug provides the plug -in support of electricity, simultaneously plug in the mechanism can with external power source is connected and carries out plug -in, effectively solved the limitation that traditional USB connector can only charges USB joint equipment, improved the versatility and practical efficiency of connector.

Description

Technical Field

[0001] This utility model belongs to the field of USB connector technology, and in particular relates to a charging direct-plug USB connector. Background Technology

[0002] In today's digital age, electronic devices have become an indispensable part of people's lives and work, and USB connectors, as an important interface for charging and data transmission of electronic devices, have an extremely wide range of applications.

[0003] Traditional USB connectors have a relatively limited function, typically only providing charging services for electronic devices with USB connectors. However, in practical use, there are electronic devices with metal prong plugs, such as some small household appliances and power tools, which cannot be plugged in and used through traditional USB connectors.

[0004] This limitation of functionality causes many inconveniences for users. When users need to power devices with different types of plugs at the same time, they often need to prepare multiple different types of connectors or sockets, which is not only inconvenient to carry and store, but may also affect the normal use of the devices due to insufficient interfaces, reducing the convenience and efficiency of use. Utility Model Content

[0005] The purpose of this invention is to provide a charging direct-plug USB connector, which aims to solve the technical problems of traditional USB connectors in the prior art, which are not only inconvenient to carry and store, but may also affect the normal use of devices due to insufficient interfaces, thus reducing the convenience and efficiency of use.

[0006] To achieve the above objectives, the present invention provides a charging direct-plug USB connector, comprising a housing, a plug-in mechanism, a power-taking mechanism, a USB charging mechanism, a circuit board, and a motherboard socket. The plug-in mechanism, the power-taking mechanism, and the USB charging mechanism are all disposed in the housing and electrically connected to the circuit board. The circuit board is disposed in the housing and the motherboard socket, respectively, and the motherboard socket is disposed in the housing. The power-connecting mechanism includes a power socket and a power plug. The power socket is disposed on the housing, and the power plug is disposed on the power socket and electrically connected to the circuit board. The power plug is connected to an external power source for power-connection. The USB charging mechanism includes a USB connector and a charging circuit board. The USB connector is disposed on the charging circuit board and electrically connected to the charging circuit board. The charging circuit board is disposed on the housing and electrically connected to the circuit board. Multiple USB connectors are provided and are used to provide external electronic devices for plug-in charging.

[0007] As an optional solution of this utility model, three plug heads are provided and are evenly and fixedly connected to the plug socket, and all three plug heads are electrically connected to the circuit board.

[0008] As an optional solution of this utility model, four USB connectors are provided and are evenly and fixedly connected to the charging circuit board, and all of the USB connectors are electrically connected to the charging circuit board; the housing is provided with USB sockets, the number of which is the same as the number of USB connectors, and they are arranged overlappingly.

[0009] As an optional solution of this utility model, the power-gathering mechanism includes a power-gathering base, a primary power-gathering component, a secondary power-gathering component, and a tertiary power-gathering component. The power-gathering base is fixedly connected to the housing, and the primary power-gathering component, the secondary power-gathering component, and the tertiary power-gathering component are sequentially arranged on the side of the power-gathering base.

[0010] As an optional embodiment of this utility model, the primary power-taking component includes a primary protective block, a primary reset spring, and a primary power-taking plate. The primary protective block is provided with a primary movable groove and is movably disposed on the power-taking base via the primary reset spring. The primary reset spring is movably disposed within the primary movable groove and abuts against the power-taking base and the primary protective block respectively. The primary power-taking plate is disposed on one side of the primary protective block and is fixedly connected to the main board base. The primary power-taking plate is electrically connected to the circuit main board. The main board base is parallel to and spaced apart from the power-taking base and is fixedly connected to the housing. The power-taking base is inserted into the main board base. One end of the primary protective block is provided with a primary guide slope. The housing is provided with a primary power-taking hole at a position opposite to the primary guide slope. The primary power-taking hole coincides with the primary guide slope.

[0011] As an optional embodiment of this utility model, the secondary power-taking assembly includes a secondary protective block, a secondary reset spring, and a secondary power-taking plate. The secondary protective block is provided with a secondary movable groove and is movably disposed on the power-taking base via the secondary reset spring. The secondary reset spring is movably disposed within the secondary movable groove and abuts against the power-taking base and the secondary protective block respectively. The secondary power-taking plate is disposed on one side of the secondary protective block and is fixedly connected to the power-taking base. The secondary power-taking plate is electrically connected to the circuit board. The secondary protective block is perpendicular to the primary protective block. A secondary guide slope is provided at one end of the secondary protective block. A secondary power-taking hole is provided at a position opposite to the secondary guide slope on the housing, and the secondary power-taking hole coincides with the secondary guide slope.

[0012] As an optional embodiment of this utility model, the three-stage power supply assembly includes a three-stage protective block, a three-stage reset spring, and a three-stage power supply plate. The three-stage protective block is provided with a three-stage movable groove and is movably mounted on the power supply base via the three-stage reset spring. The three-stage reset spring is movably mounted in the three-stage movable groove and abuts against the power supply base and the three-stage protective block respectively. The three-stage power supply plate is disposed on one side of the three-stage protective block and is fixedly connected to the power supply base. The three-stage power supply plate is electrically connected to the circuit board. The three-stage protective block is arranged parallel to the one-stage protective block. One end of the three-stage protective block is provided with a three-stage guide slope. The housing is provided with a three-stage power supply hole at a position opposite to the three-stage guide slope. The three-stage power supply hole coincides with the three-stage guide slope.

[0013] As an optional solution of this utility model, a power-off fuse assembly is provided between the power socket and the power outlet. The power-off fuse assembly is respectively disposed on the power socket and the power outlet. The power-off fuse assembly includes a fuse holder, a fuse contact piece, a fuse core, and a fuse frame. The fuse holder is respectively inserted into the power socket and the power outlet. The fuse contact piece is fixedly connected to the fuse holder. The fuse core passes through the fuse contact piece and the fuse frame in sequence. The fuse frame is installed on the power socket.

[0014] As an optional solution of this utility model, two safety contact pieces are provided, which are arranged in parallel and spaced apart. The safety contact pieces are elastic and elastically clamp the safety core.

[0015] As an optional solution of this utility model, the fuse core is made of nickel-chromium alloy.

[0016] The above-mentioned technical solutions of the charging direct-plug USB connector provided in this embodiment of the utility model have at least one of the following technical effects: The charging direct-plug USB connector provided in this application integrates a plugging mechanism, a power-taking mechanism, and a USB charging mechanism. It can not only charge electronic devices with USB connectors through the USB charging mechanism, but also provide plugging support for devices with metal plugs through the power-taking mechanism. At the same time, the plugging mechanism can be connected to an external power source for plugging. This effectively solves the limitation of traditional USB connectors that can only charge USB connector devices, and improves the versatility and practical efficiency of the connector. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of a charging direct-plug USB connector provided in an embodiment of this utility model.

[0019] Figure 2 A perspective view of a charging direct-plug USB connector provided in an embodiment of this utility model.

[0020] Figure 3 A perspective view of the charging direct-plug USB connector provided in this embodiment of the utility model, omitting the housing.

[0021] Figure 4 A perspective view of the charging direct-plug USB connector provided in this embodiment of the utility model, omitting the housing.

[0022] Figure 5 A perspective view of the power-taking mechanism and USB charging mechanism of the charging direct-plug USB connector provided in the embodiment of this utility model.

[0023] Figure 6 A perspective view of the power-taking mechanism and USB charging mechanism of the charging direct-plug USB connector provided in the embodiment of this utility model.

[0024] Figure 7 A perspective view of the power-taking mechanism and USB charging mechanism of the charging direct-plug USB connector provided in the embodiment of this utility model.

[0025] Figure 8 A perspective view of the power-taking mechanism and USB charging mechanism of the charging direct-plug USB connector provided in the embodiment of this utility model.

[0026] Figure 9 An exploded view of the charging direct-plug USB connector provided in an embodiment of this utility model.

[0027] Figure 10 An exploded view of the charging direct-plug USB connector provided in an embodiment of this utility model.

[0028] Figure 11 A perspective view of the power-off protection component of the charging direct-plug USB connector provided in an embodiment of this utility model.

[0029] The following are the labeling elements in the figure: 1. Housing; 2. Power-on mechanism; 3. Power-on mechanism; 4. USB charging mechanism; 5. Circuit board; 6. Board socket; 7. Power failure fuse assembly; 11. USB port; 12. Primary power supply port; 13. Secondary power supply port; 21. Power outlet; 22. Power plug; 31. Power supply base; 32. Primary power supply assembly; 33. Secondary power supply assembly; 34. Tertiary power supply assembly; 41. USB connector; 42. Charging circuit board; 71. Fuse holder; 72. Fuse contact piece; 73. Fuse core; 74. Fuse frame; 321. Primary protective block; 322. Primary return spring; 323. Primary power take-up plate; 324. Primary movable slot; 331. Secondary protective block; 332. Secondary reset spring; 333. Secondary power take-up plate; 334. Secondary movable slot; 341. Three-stage protective block; 342. Three-stage reset spring; 343. Three-stage power take-up plate; 344. Three-stage movable slot. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0031] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0034] In one embodiment of this utility model, such as Figures 1-11 As shown, a charging direct-plug USB connector is provided, including a housing 1, a plug-in mechanism 2, a power-taking mechanism 3, a USB charging mechanism 4, a circuit board 5, and a motherboard socket 6. The plug-in mechanism 2, the power-taking mechanism 3, and the USB charging mechanism 4 are all disposed in the housing 1 and electrically connected to the circuit board 5. The circuit board 5 is disposed in the housing 1 and the motherboard socket 6, respectively. The motherboard socket 6 is disposed in the housing 1.

[0035] The power supply mechanism 2 includes a power socket 21 and a power plug 22. The power socket 21 is fixedly connected to the housing 1, and the power plug 22 is fixedly connected to the power socket 21 and electrically connected to the circuit board 5. The power plug 22 is plugged in by connecting to an external power source.

[0036] The USB charging mechanism 4 includes a USB connector 41 and a charging circuit board 42. The USB connector 41 is fixedly connected to and electrically connected to the charging circuit board 42. The charging circuit board 42 is fixedly connected to the housing 1 and electrically connected to the main circuit board 5. Multiple USB connectors 41 are provided and are used to provide charging for external electronic devices.

[0037] The charging direct-plug USB connector provided in this application integrates a power-plugging mechanism 2, a power-taking mechanism 3, and a USB charging mechanism 4. It can not only charge electronic devices with USB connectors 41 through the USB charging mechanism 4, but also provide power support for devices with metal plugs through the power-taking mechanism 3. At the same time, the power-plugging mechanism 2 can be connected to an external power source for power-plugging. This effectively solves the limitation of traditional USB connectors that can only charge devices with USB connectors 41, and improves the versatility and practical efficiency of the connector.

[0038] In another embodiment of this utility model, three connectors 22 are provided and evenly and fixedly connected to the connector socket 21. All three connectors 22 are electrically connected to the circuit board 5. The arrangement of the three connectors 22 conforms to common power interface standards, enabling stable connection to an external power source and providing power input to the entire connector. In another embodiment of this utility model, four USB connectors 41 are provided and evenly fixedly connected to the charging circuit board 42, and all USB connectors 41 are electrically connected to the charging circuit board 42; the housing 1 is provided with USB sockets 11, the number of USB sockets 11 is the same as the number of USB connectors 41, and they are arranged overlappingly. By providing four USB connectors 41, charging interfaces can be provided for four electronic devices with USB connectors 41 at the same time, meeting the needs of charging multiple devices at the same time and improving charging efficiency.

[0039] In another embodiment of this utility model, the power-collecting mechanism 3 includes a power-collecting base 31, a primary power-collecting component 32, a secondary power-collecting component 33, and a tertiary power-collecting component 34. The power-collecting base 31 is fixedly connected to the housing 1, and the primary power-collecting component 32, the secondary power-collecting component 33, and the tertiary power-collecting component 34 are sequentially arranged on the side of the power-collecting base 31.

[0040] In another embodiment of this utility model, the primary power-taking component 32 includes a primary protective block 321, a primary reset spring 322, and a primary power-taking piece 323. The primary protective block 321 is provided with a primary movable groove 324 and is movably disposed on the power-taking base 31 via the primary reset spring 322. The primary reset spring 322 is movably disposed in the primary movable groove 324 and abuts against the power-taking base 31 and the primary protective block 321 respectively. The primary power-taking piece 323 is disposed on one side of the primary protective block 321 and is fixedly connected to the main board base 6. The primary power-taking piece 323 is electrically connected to the circuit main board 5. The main board base 6 is parallel and spaced apart from the power-taking base 31 and is fixedly connected to the housing 1. The power-taking base 31 is inserted into the main board base 6. A primary guide slope is provided at one end of the primary protective block 321. A primary power-taking hole 12 is provided at the position opposite to the primary guide slope on the housing 1. The primary power-taking hole 12 coincides with the primary guide slope. The operation of the primary power-taking component 32 is as follows: When a plug with metal prongs is inserted into the primary power-taking hole 12, the plug pushes the primary protective block 321 along the primary guide slope. The primary protective block 321 compresses the primary return spring 322 and moves on the power-taking base 31. Since the primary power-taking component 32, the secondary power-taking component 33, and the tertiary power-taking component 34 are set on different planes, the plug will contact the primary power-taking piece 323, the secondary power-taking piece 333, and the tertiary power-taking piece 343 respectively to obtain power. When the plug is pulled out, the primary return spring 322 resets, driving the primary protective block 321 back to its initial position, thus providing protection.

[0041] In another embodiment of this utility model, the secondary power-taking component 33 includes a secondary protective block 331, a secondary reset spring 332, and a secondary power-taking piece 333. The secondary protective block 331 is provided with a secondary movable groove 334 and is movably disposed on the power-taking base 31 via the secondary reset spring 332. The secondary reset spring 332 is movably disposed in the secondary movable groove 334 and abuts against the power-taking base 31 and the secondary protective block 331 respectively. The secondary power-taking piece 333 is disposed on one side of the secondary protective block 331 and is fixedly connected to the power-taking base 31. The secondary power-taking piece 333 is electrically connected to the circuit main board 5. The secondary protective block 331 is perpendicular to the primary protective block 321. A secondary guide slope is provided at one end of the secondary protective block 331. A secondary power-taking hole 13 is provided at the position opposite to the secondary guide slope on the housing 1. The secondary power-taking hole 13 coincides with the secondary guide slope. The working process of the secondary power extraction component 33 is as follows: When the plug with the metal prongs is inserted into the secondary power extraction hole 13, the plug pushes the secondary protective block 331 along the secondary guide slope. The secondary protective block 331 compresses the secondary reset spring 332 and moves on the power extraction base 31. Since the primary power extraction component, the secondary power extraction component 33, and the tertiary power extraction component 34 are set on different planes, the plug will contact the primary power extraction piece 323, the secondary power extraction piece 333, and the tertiary power extraction piece 343 respectively to extract power. When the plug is pulled out, the secondary reset spring 332 resets, driving the secondary protective block 331 back to its initial position, thus providing protection.

[0042] In another embodiment of this utility model, the three-stage power supply assembly 34 includes a three-stage protective block 341, a three-stage reset spring 342, and a three-stage power supply plate 343. The three-stage protective block 341 is provided with a three-stage movable groove 344 and is movably disposed on the power supply base 31 through the three-stage reset spring 342. The three-stage reset spring 342 is movably disposed in the three-stage movable groove 344 and abuts against the power supply base 31 and the three-stage protective block 341 respectively. The three-stage power supply plate 343 is disposed on one side of the three-stage protective block 341 and is fixedly connected to the power supply base 31. The three-stage power supply plate 343 is electrically connected to the circuit main board 5. The three-stage protective block 341 is arranged parallel to the first-stage protective block 321. A three-stage guide slope is provided at one end of the three-stage protective block 341. A three-stage power supply hole 14 is provided at the position opposite to the three-stage guide slope on the housing 1. The three-stage power supply hole 14 is arranged to coincide with the three-stage guide slope. The three-stage power extraction assembly 34 operates as follows: When a plug with metal prongs is inserted into the three-stage power extraction hole 14, the plug pushes the three-stage protective block 341 along the three-stage guide slope. The three-stage protective block 341 compresses the three-stage return spring 342 and moves on the power extraction base 31. Since the first-stage power extraction assembly 32, the second-stage power extraction assembly 33, and the three-stage power extraction assembly 34 are set on different planes, the plug will contact the first-stage power extraction piece 323, the second-stage power extraction piece 333, and the three-stage power extraction piece 343 respectively, thus extracting power. When the plug is pulled out, the three-stage return spring 342 resets, causing the three-stage protective block 341 to return to its initial position, thus providing protection.

[0043] In another embodiment of this utility model, a power-off fuse assembly 7 is provided between the power socket 21 and the power outlet 31. The power-off fuse assembly 7 is respectively disposed on the power socket 21 and the power outlet 31. The power-off fuse assembly 7 includes a fuse holder 71, a fuse contact piece 72, a fuse core 73 and a fuse frame 74. The fuse holder 71 is respectively inserted into the power socket 21 and the power outlet 31. The fuse contact piece 72 is fixedly connected to the fuse holder 71. The fuse core 73 is sequentially disposed through the fuse contact piece 72 and the fuse frame 74. The fuse frame 74 is installed on the power socket 21.

[0044] In another embodiment of this utility model, two fuse contacts 72 are provided, arranged in parallel and spaced apart. The fuse contacts 72 are elastic and elastically clamp the fuse core 73. Further, the fuse core 73 is made of nickel-chromium alloy. When the circuit experiences abnormal conditions such as overcurrent or short circuit, the fuse core 73 will melt due to temperature rise, cutting off the current path between the plug socket 21 and the power take-off socket 31, preventing excessive current from damaging the connector and the connected electronic equipment, and avoiding safety hazards. The elastic fuse contacts 72 firmly clamp the fuse core 73, ensuring the stability of the circuit when it is conducting normally. The structural design of the fuse holder 71 and the fuse frame 74 makes the components firmly installed and facilitates the replacement of the fuse core 73, ensuring that the connector can be reused safely.

[0045] The charging direct-plug USB connector provided in this application integrates a power-plugging mechanism 2, a power-taking mechanism 3, and a USB charging mechanism 4. It can not only charge electronic devices with USB connectors 41 through the USB charging mechanism 4, but also provide power support for devices with metal plugs through the power-taking mechanism 3. At the same time, the power-plugging mechanism 2 can be connected to an external power source for power-plugging. This effectively solves the limitation of traditional USB connectors that can only charge devices with USB connectors 41, and improves the versatility and practical efficiency of the connector.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A charging direct-plug USB connector, characterized in that, The device includes a housing, a power-connecting mechanism, a power-taking mechanism, a USB charging mechanism, a circuit board, and a motherboard socket. The power-connecting mechanism, the power-taking mechanism, and the USB charging mechanism are all disposed in the housing and electrically connected to the circuit board. The circuit board is disposed in both the housing and the motherboard socket, and the motherboard socket is disposed in the housing. The power-connecting mechanism includes a power socket and a power plug. The power socket is disposed on the housing, and the power plug is disposed on the power socket and electrically connected to the circuit board. The power plug is connected to an external power source for power-connection. The USB charging mechanism includes a USB connector and a charging circuit board. The USB connector is disposed on the charging circuit board and electrically connected to the charging circuit board. The charging circuit board is disposed on the housing and electrically connected to the circuit board. Multiple USB connectors are provided and are used to provide external electronic devices for plug-in charging.

2. The charging direct-plug USB connector according to claim 1, characterized in that, The power connector is provided in three parts and is evenly and fixedly connected to the power socket. All three power connectors are electrically connected to the main circuit board.

3. A charging direct-plug USB connector according to claim 1, characterized in that, The USB connectors are provided in four parts and are evenly and fixedly connected to the charging circuit board. All of the USB connectors are electrically connected to the charging circuit board. The housing is provided with USB ports, the number of which is the same as the number of USB connectors and they are arranged overlappingly.

4. A charging direct-plug USB connector according to claim 1, characterized in that, The power-gathering mechanism includes a power-gathering base, a primary power-gathering component, a secondary power-gathering component, and a tertiary power-gathering component. The power-gathering base is fixedly connected to the housing, and the primary power-gathering component, the secondary power-gathering component, and the tertiary power-gathering component are sequentially arranged on the side of the power-gathering base.

5. A charging direct-plug USB connector according to claim 4, characterized in that, The primary power-gathering assembly includes a primary protective block, a primary reset spring, and a primary power-gathering plate. The primary protective block has a primary movable groove and is movably mounted on the power-gathering base via the primary reset spring. The primary reset spring is movably mounted within the primary movable groove and abuts against the power-gathering base and the primary protective block, respectively. The primary power-gathering plate is disposed on one side of the primary protective block and is fixedly connected to the main board base. The primary power-gathering plate is electrically connected to the circuit main board. The main board base is parallel to and spaced apart from the power-gathering base and is fixedly connected to the housing. The power-gathering base is inserted into the main board base. One end of the primary protective block has a primary guide slope. The housing has a primary power-gathering hole at a position opposite to the primary guide slope, and the primary power-gathering hole coincides with the primary guide slope.

6. A charging direct-plug USB connector according to claim 5, characterized in that, The secondary power-gathering assembly includes a secondary protective block, a secondary reset spring, and a secondary power-gathering plate. The secondary protective block has a secondary movable groove and is movably mounted on the power-gathering base via the secondary reset spring. The secondary reset spring is movably mounted within the secondary movable groove and abuts against the power-gathering base and the secondary protective block, respectively. The secondary power-gathering plate is disposed on one side of the secondary protective block and is fixedly connected to the power-gathering base. The secondary power-gathering plate is electrically connected to the circuit board. The secondary protective block is perpendicular to the primary protective block. One end of the secondary protective block has a secondary guide slope. The housing has a secondary power-gathering hole at a position opposite to the secondary guide slope, and the secondary power-gathering hole coincides with the secondary guide slope.

7. A charging direct-plug USB connector according to claim 6, characterized in that, The three-stage power supply assembly includes a three-stage protective block, a three-stage reset spring, and a three-stage power supply plate. The three-stage protective block is provided with a three-stage movable groove and is movably mounted on the power supply base via the three-stage reset spring. The three-stage reset spring is movably mounted in the three-stage movable groove and abuts against the power supply base and the three-stage protective block respectively. The three-stage power supply plate is disposed on one side of the three-stage protective block and is fixedly connected to the power supply base. The three-stage power supply plate is electrically connected to the circuit board. The three-stage protective block is arranged parallel to the one-stage protective block. One end of the three-stage protective block is provided with a three-stage guide slope. The housing is provided with a three-stage power supply hole at a position opposite to the three-stage guide slope. The three-stage power supply hole coincides with the three-stage guide slope.

8. A charging direct-plug USB connector according to claim 4, characterized in that, A power-off fuse assembly is provided between the power socket and the power outlet. The power-off fuse assembly is respectively disposed on the power socket and the power outlet. The power-off fuse assembly includes a fuse holder, a fuse contact piece, a fuse core, and a fuse frame. The fuse holder is respectively inserted into the power socket and the power outlet. The fuse contact piece is fixedly connected to the fuse holder. The fuse core passes through the fuse contact piece and the fuse frame in sequence. The fuse frame is installed on the power socket.

9. A charging direct-plug USB connector according to claim 8, characterized in that, The safety contact piece is provided in two parallel and spaced-apart pieces, and the safety contact piece is elastic and elastically clamps the safety core.

10. A charging direct-plug USB connector according to claim 8, characterized in that, The fuse core is made of nickel-chromium alloy.

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