Charger with foldable pins

Abstract

The utility model provides a charger with foldable pins, and the charger comprises a pin assembly which is used for connecting an external power supply; the charger main body is movably connected with the pin assembly, so that the pin assembly is switched between a use state and a storage state; the pin assembly is used for abutting against the charger main body in a use state and electrically connected with the charger main body, and is further used for being close to the side wall of the charger main body in a storage state and disconnecting the electrical connection with the charger main body. The utility model provides the charger with the foldable pins, the charger has relatively high use flexibility and portability, the occupied space is effectively reduced, the safety performance is enhanced, and the use experience of a user is optimized.

Description

Technical Field

[0001] This application relates to the field of charger technology, and in particular to a charger with foldable plugs. Background Technology

[0002] Smartphones, tablets, and many other portable electronic devices are widely used, but their battery life is very limited, often requiring a compatible charger.

[0003] In existing technologies, chargers typically consist of a main body, prongs, and other parts. The connection and positional relationship between the prongs and the main body are relatively stable, requiring a large amount of storage space. Furthermore, the prongs are mostly made of metal, and the protruding part, which is used to connect to the socket, can easily scratch backpacks, thus causing inconvenience in use.

[0004] Therefore, a solution is needed to address at least one of the aforementioned problems. Utility Model Content

[0005] To address at least one of the shortcomings of the prior art, this application proposes a charger with foldable plugs, which is easy to store and has good flexibility of use to meet the actual needs of users.

[0006] A charger with foldable prongs, comprising:

[0007] Pin assembly, used to connect to an external power source;

[0008] The charger body is movably connected to the plug assembly, allowing the plug assembly to switch between a usage state and a storage state.

[0009] The plug assembly is used to abut against the charger body in the use state and to be electrically connected to the charger body, and is also used to be close to the side wall of the charger body in the storage state and to disconnect the electrical connection with the charger body.

[0010] In one specific embodiment, it further includes: a linkage mechanism;

[0011] One end of the linkage mechanism is connected to the plug assembly, and the other end is connected to the charger body, so as to realize the rotatable connection between the charger body and the plug assembly.

[0012] In one specific embodiment, the linkage mechanism includes a first link and a second link;

[0013] The first link is rotatably connected to the second link, one end of the first link is slidably connected to the plug assembly, and the other end of the first link is rotatably connected to the charger body;

[0014] One end of the second link is rotatably connected to the plug assembly and electrically connected to the plug assembly, while the other end of the second link is slidably connected to the charger body and is used for electrical connection to the charger body.

[0015] In one specific embodiment, a sliding shaft is provided at one end of the first connecting rod connected to the plug assembly and / or at one end of the second connecting rod connected to the charger body;

[0016] The plug assembly and / or the charger body are provided with guide grooves that match the sliding shaft.

[0017] In one specific embodiment, the charger body is provided with a conductive clip for achieving an electrical connection between the plug assembly and the charger body.

[0018] In one specific embodiment, the linkage mechanism includes an inner conductor layer and an outer insulating layer that surrounds the conductor layer.

[0019] In one specific embodiment, the pin assembly has a limiting groove that matches the linkage mechanism.

[0020] In one specific embodiment, the pin assembly includes pins, a pin socket, and a pin socket connection cover;

[0021] The socket is fitted onto the socket connection cover, and the plug is located at the end of the socket connection cover away from the socket.

[0022] In one specific embodiment, the connector cover has a support surface facing away from the connector;

[0023] The charger body is used to have the side of the plug assembly that abuts against the abutting surface when the plug assembly is in use as the abutting surface, and the plane on which the abutting surface is located is used to be parallel or approximately parallel to the plane on which the abutting surface is located when the plug assembly is in the stored state.

[0024] In one specific embodiment, the charger body is also provided with an interface for connecting an external power cord.

[0025] Beneficial effects:

[0026] This application provides a charger with foldable plugs, which has strong flexibility and portability, effectively reduces space occupation, enhances safety performance, and optimizes user experience. Specifically, the plug assembly is movably connected to the charger body, allowing the plug assembly to switch between a use state and a storage state, which effectively improves the charger's form, reduces space occupation, and thus enhances flexibility and portability. Furthermore, in the storage state, the plug assembly is disconnected from the electrical connection with the charger body, enhancing the charger's safety performance. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 The foldable plug charger structure of this embodiment exploded. Figure 1 ;

[0029] Figure 2 The foldable plug charger structure of this embodiment exploded. Figure 2 ;

[0030] Figure 3 This is a three-dimensional structural diagram of the charger with foldable plugs according to this embodiment;

[0031] Figure 4 This is a three-dimensional structural diagram of the charger with foldable plugs in use according to this embodiment.

[0032] Figure 5 This is a three-dimensional structural diagram of the charger with foldable plugs in the storage state according to this embodiment.

[0033] Figure 6 This is a schematic diagram of the linkage mechanism connection relationship in the usage state of this embodiment;

[0034] Figure 7 This is a schematic diagram of the linkage mechanism connection relationship in the stowed state of this embodiment;

[0035] Figure 8 This is a cross-section of the linkage mechanism in this embodiment. Figure 1 ;

[0036] Figure 9 This is a cross-section of the linkage mechanism in this embodiment. Figure 2 .

[0037] Figure label:

[0038] 1-Plug assembly; 11-Plug; 12-Plug socket; 13-Plug socket connection cover; 131-Abutting surface; 14-Limiting groove; 15-Through hole; 2-Charger body; 21-Receiving groove; 22-Guide groove; 23-Conductive clip; 24-Abutting surface; 25-Interface; 26-Charger connection cover; 27-Side; 3-Linkage mechanism; 31-First link; 32-Second link; 33-Sliding shaft; 34-Conductive shaft; 35-Connecting pivot; 36-Conductor layer; 37-Insulating layer. Detailed Implementation

[0039] Various embodiments of this disclosure will be described more fully below. This disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of this disclosure to the specific embodiments disclosed herein, but rather this disclosure should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of this disclosure.

[0040] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of this disclosure, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of this disclosure, the terms “comprising,” “having,” and their cognates are intended only to indicate a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of the foregoing.

[0041] In various embodiments of this disclosure, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0042] The terms used in the various embodiments of this disclosure (such as "first," "second," etc.) may modify various components in the various embodiments, but do not limit the corresponding components. For example, the above terms do not limit the order and / or importance of the components. The above terms are only used for the purpose of distinguishing one component from others. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first component may be referred to as a second component without departing from the scope of the various embodiments of this disclosure, and similarly, a second component may also be referred to as a first component.

[0043] It should be noted that if a description is made of "connecting" one component to another, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0044] The term "user" as used in various embodiments of this disclosure may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

[0045] The terminology used in the various embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this disclosure pertain. Terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this disclosure.

[0046] Example

[0047] This application provides a charger with foldable plugs, such as... Figure 1 As shown, it includes:

[0048] Pin assembly 1, used to connect to an external power source;

[0049] Specifically, in some embodiments of this application, the external power source may be a socket;

[0050] Of course, there are no restrictions on the specific external power source.

[0051] The charger body 2 is movably connected to the plug assembly 1, so that the plug assembly 1 can switch between a use state and a storage state.

[0052] Combination Figure 4 and Figure 5 and Figure 6 and Figure 7 As shown, the plug assembly 1 is used to abut against the charger body 2 in the use state and is electrically connected to the charger body 2, and is also used to be close to the side wall of the charger body 2 in the storage state and disconnected from the charger body 2.

[0053] Specifically, in some embodiments of this application, when in use, the charger body 2 has an outer peripheral surface perpendicular to the axial direction of the plug assembly 1, for contacting the plug assembly 1.

[0054] Understandably, the movable connection between the charger body 2 and the plug assembly 1 makes it easy to change the overall external shape of the charger. When not in use, i.e. when the charger is in its retractable state, the plug assembly 1 can be rotated and folded to fit close to the charger body 2, reducing the space occupied by the charger, making the charger structure more compact and the external shape more concise, avoiding a bulky shape, making it easy to carry, and thus enhancing the portability of the charger.

[0055] When the prong assembly 1 is folded into its stowed state, it not only prevents the prong 11 from being exposed and easily damaged by physical force, but also avoids the problem of easily scratching other items such as the inner wall of a backpack, thereby optimizing the user experience.

[0056] Furthermore, when in its retracted state, the plug assembly 1 is disconnected from the electrical connection with the charger body 2, which reduces the risk of short circuits or other potential electrical safety issues, thereby further enhancing the safety performance of the charger.

[0057] Specifically, in some embodiments of this application, the charger is a European standard charger. Of course, there is no limitation on the specific type of charger. When in use, the plug assembly 1 is upright and can be normally inserted into a European standard socket for power supply operation.

[0058] Furthermore, such as Figure 1 and Figure 2 As shown, it also includes: linkage mechanism 3;

[0059] The charger body 2 has a receiving slot 21;

[0060] Specifically, in some embodiments of this application, the receiving slot 21 is formed on the charger connection cover 26 of the charger body 2.

[0061] One end of the linkage mechanism 3 is connected to the plug assembly 1, and the other end is connected to the charger body 2, so as to realize the rotational connection between the charger body 2 and the plug assembly 1;

[0062] The linkage mechanism 3 is movably inserted into the receiving groove 21 so that the linkage mechanism 3 can switch between being retracted into and extended from the receiving groove 21, thereby enabling the charger to switch between the storage state and the use state.

[0063] By setting the linkage mechanism 3, the plug assembly 1 and the charger body 2 are rotatably connected, allowing flexible rotation and folding between the plug assembly 1 and the charger body 2; users can more conveniently adjust the charger to the use state or the storage state according to their needs, improving the flexibility of use.

[0064] The linkage mechanism 3 is designed to make the connection between the plug assembly 1 and the charger body 2 more secure, reducing the possibility of the plug assembly 1 loosening or falling off due to external force during use, thereby enhancing the durability and safety of the charger.

[0065] Furthermore, by setting the linkage mechanism 3, the process of the pin assembly 1 extending or retracting into the receiving groove 21 is simpler and smoother, and users can easily adjust the state of the pin assembly 1 through simple operation.

[0066] Specifically, in some embodiments of this application, the linkage mechanism 3 includes a first link 31 and a second link 32; wherein the cross-sectional shapes of the first link 31 and the second link 32 include arc shapes;

[0067] The first link 31 is rotatably connected to the second link 32, one end of the first link 31 is slidably connected to the plug assembly 1, and the other end of the first link 31 is rotatably connected to the charger body 2;

[0068] Specifically, such as Figure 2 As shown, in some embodiments of this application, the first link 31 and the second link 32 are connected by a connecting shaft 35 and rotate around the connecting shaft 35 as the axis of rotation.

[0069] The first link 31 is used to connect one end of the charger body 2, which is surrounded by the second link 32, and the first link 31 is used to connect the plug assembly 1, which is exposed on the second link 32.

[0070] One end of the second link 32 is rotatably connected to the plug assembly 1 and electrically connected to the plug assembly 1, while the other end of the second link 32 is slidably connected to the charger body 2 and is used for electrically connecting to the charger body 2.

[0071] The first link 31 and the second link 32 are connected by a connecting shaft 35 and rotate relative to each other with the connecting shaft 35 as the axis of rotation. This makes the movement of the entire mechanism more stable. The movement trajectory of the plug assembly 1 is stably controlled by the link mechanism 3, which improves the reliability and stability of the charger and allows the plug assembly 1 to rotate and move flexibly between different positions, further enhancing the folding flexibility of the plug assembly 1.

[0072] More specifically, in some embodiments of this application, the charger body 2 is rectangular in shape, and the outer shell is made of PC (polycarbonate) material with high insulation and high temperature resistance, which can effectively protect the internal circuit and provide a stable support for the linkage mechanism 3. The internal components include conventional charging circuit components such as transformers, rectifiers and filter capacitors, which helps to stably convert the input AC power into DC power suitable for electronic devices.

[0073] Furthermore, such as Figure 2 As shown, a sliding shaft 33 is provided at one end of the first connecting rod 31 that connects to the plug assembly 1 and / or at one end of the second connecting rod 32 that connects to the charger body 2;

[0074] The plug assembly 1 and / or the charger body 2 are provided with a guide groove 22 that matches the sliding shaft 33, and the sliding shaft 33 is movably inserted into the guide groove 22.

[0075] The sliding shaft 33 is movably inserted into the guide groove 22, making the movement of the plug assembly 1 and / or the charger body 2 more stable. The cooperation between the sliding shaft 33 and the guide groove 22 helps to optimize the movement trajectory of the plug assembly 1, thereby avoiding irregular swaying or vibration and helping to maintain the stability of the overall structure. The limiting effect of the guide groove 22 on the sliding shaft 33 also helps to achieve precise docking of the plug assembly 1 or the charger body 2 during movement, preventing errors caused by deviations between components during installation or use.

[0076] In addition, the cooperation between the sliding shaft 33 and the guide groove 22 reduces the friction of direct contact between the parts, and accurately stops the plug assembly 1 when it is folded to the preset position, preventing over-folding or rebound. At the same time, it buffers the impact force generated by the plug assembly 1 during folding and unfolding, reduces wear caused by friction, and extends the service life of the plug assembly 1 and the charger body 2.

[0077] Specifically, in some embodiments of this application, the charger body 2 further includes a charger connection cover 26, and a guide groove 22 is formed on the plug connection cover 13 and the charger connection cover 26.

[0078] The second connecting rod 32 is firmly riveted to the plug assembly 1 via a conductive shaft 34, allowing the plug assembly 1 to rotate around the conductive shaft 34 at one end of the second connecting rod 32. The sliding shaft 33 at the other end of the second connecting rod 32 is also a conductive shaft 34, and is slidably connected to the guide groove 22 inside the charger connection cover 26. One end of the first connecting rod 31 is rotatably connected to the charger connection cover 26, and the other end of the first connecting rod 31 is slidably connected to the guide groove 22 inside the plug socket connection cover 13.

[0079] Furthermore, such as Figure 6 and Figure 7As shown, a conductive clip 23 is provided in the charger body 2 to realize the electrical connection between the plug assembly 1 and the charger body 2;

[0080] The linkage mechanism 3 is used to retract into the receiving groove 21 when the plug assembly 1 is in use so as to contact the conductive clip 23 and realize the electrical connection between the plug assembly 1 and the charger body 2.

[0081] Specifically, in some embodiments of this application, the linkage mechanism 3 achieves electrical connection between the plug assembly 1 and the charger body 2 through the connection of the conductive shaft 34 and the conductive clamp 23.

[0082] The conductive clip 23 is responsible for connecting the plug assembly 1 to the internal circuit of the charger, which helps to effectively transmit electrical energy; the plug connection cover 13 and the charger connection cover 26 respectively protect the plug 11 and the internal circuit, which helps to maintain the stability of each component during use and folding.

[0083] Furthermore, such as Figure 8 and Figure 9 As shown, the linkage mechanism 3 includes an inner conductor layer 36 and an outer insulating layer 37 that surrounds the conductor layer 36.

[0084] Specifically, in some embodiments of this application, the conductor layer 36 is located at least in the conductive shaft 34.

[0085] The insulating layer 37 prevents current from flowing outside the conductor layer 36, thereby avoiding electrical short circuits. In the linkage mechanism 3, the insulating layer 37 is provided to wrap the conductor layer 36, which can effectively prevent accidental contact that could lead to a short circuit. The insulating layer 37 can also protect the conductor layer 36 from external factors such as mechanical damage, moisture, pollution, and dust, thereby extending the service life of the conductor layer 36 and enhancing the safety of the charger.

[0086] Furthermore, such as Figure 1 and Figure 5 As shown, the pin assembly 1 has a limiting groove 14 that matches the linkage mechanism 3.

[0087] The matching design of the limiting groove 14 and the linkage mechanism 3 helps to achieve precise alignment between the plug assembly 1 and the charger body 2 during connection, thereby achieving a good electrical connection. It can also further prevent mechanical stress concentration caused by misalignment. When the linkage mechanism 3 is fully embedded in the limiting groove 14, a relatively stable mechanical connection will be formed, which helps to prevent the plug assembly 1 from loosening due to vibration or external force during use, thereby ensuring the stability and reliability of the charging process to a certain extent. When the linkage mechanism 3 is embedded in the limiting groove 14, the charger is in use, which also helps to keep the charger in use.

[0088] Furthermore, such as Figure 2 As shown, the plug assembly 1 includes a plug 11, a plug socket 12, and a plug socket connection cover 13;

[0089] The socket 12 is fitted onto the socket connecting cover 13, and the pin 11 is located at the end of the socket connecting cover 13 away from the socket 12, and passes through the through holes 15 provided on the socket connecting cover 13 and the socket 12 in sequence.

[0090] The plug socket 12 is fitted onto the plug socket connecting cover 13. This nested design enhances the overall stability of the plug assembly 1, making the plug 11 more stable when inserted into the socket and less prone to shaking or falling off. The plug 11 is fixedly connected to the plug socket connecting cover 13 and the plug socket 12 through the through hole 15. This connection method enhances the support of the plug 11 and improves the durability of the plug assembly 1. The nested design and the connection through hole 15 also allow the plug assembly 1 to better distribute stress when subjected to external impact, reducing the risk of damage caused by stress concentration.

[0091] Specifically, in some embodiments of this application, the pin 11 is designed strictly according to European standards and is made of high-quality copper alloy, which has excellent conductivity and corrosion resistance, and can achieve good charging effect and long service life; the root of the pin 11 is connected to the conductive shaft 34, and the diameter of the conductive shaft 34 is precisely designed so that it can fit tightly and flexibly with the connection hole of the linkage mechanism 3, so that the pin 11 has good rotational stability during folding and unfolding.

[0092] Furthermore, such as Figure 4 and Figure 5 As shown, the connector cover 13 has a support surface 131 that is opposite to the connector 12;

[0093] The charger body 2 has a contact surface 24 on the side that abuts against the contact surface 131 when the plug assembly 1 is in use. The plane on which the contact surface 24 is located is parallel or approximately parallel to the plane on which the contact surface 131 is located when the plug assembly 1 is in the storage state.

[0094] Specifically, in some embodiments of this application, the plug assembly 1 is perpendicular to the plane of the contact surface 24 in both the use state and the storage state.

[0095] More specifically, when it is necessary to fold the plug assembly 1, a certain pressure is applied to the outer end of the plug assembly 1, and the plug assembly 1 rotates around the conductive shaft 34 at its root. The rotation of the plug 11 drives the first link 31 and the second link 32 to move. Through the coordinated action of the connecting shaft 35 and the sliding shaft 33, the linkage mechanism 3 smoothly pulls the plug 11 to fold. Due to the precise design of the length of the linkage mechanism 3, the position of the connection point and the internal support structure, the plug 11 can be smoothly rotated 160 degrees to 200 degrees and finally fits against the side 27 of the charger body 2.

[0096] Furthermore, such as Figure 3 As shown, the charger body 2 is also provided with an interface 25 for connecting an external power cord. The interface 25 is electrically connected to a circuit board located inside the charger body 2.

[0097] Specifically, in some embodiments of this application, the interface 25 may be a Type-C interface 25, a MicroUSB interface 25, or a Lightning interface 25; or it may be any combination of the above interfaces 25; of course, there is no limitation on the type of interface 25.

[0098] The embodiments of this application have at least the following beneficial effects:

[0099] This embodiment provides a charger with foldable plugs, which has strong flexibility and portability, effectively reduces the space occupied, enhances safety performance, and optimizes the user experience. Specifically, the charger body 2 is movably connected to the plug assembly 1, so that the plug assembly 1 can switch between a use state and a storage state, which can effectively improve the form of the charger, reduce the space occupied, and thus enhance the flexibility and portability. Moreover, in the storage state, the plug assembly 1 is disconnected from the electrical connection with the charger body 2, which enhances the safety performance of the charger.

[0100] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this application.

[0101] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0102] The serial numbers in this application are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenario.

[0103] The above disclosures are only a few specific implementation scenarios of this application. However, this application is not limited to these. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this application.

Claims

1. A charger with foldable prongs, characterized in that, include: Pin assembly, used to connect to an external power source; The charger body is movably connected to the plug assembly, allowing the plug assembly to switch between a usage state and a storage state. The plug assembly is used to abut against the charger body in the use state and to be electrically connected to the charger body, and is also used to be close to the side wall of the charger body in the storage state and to disconnect the electrical connection with the charger body.

2. A charger with foldable plugs according to claim 1, characterized in that, Also includes: Linkage mechanism; One end of the linkage mechanism is connected to the plug assembly, and the other end is connected to the charger body, so as to realize the rotatable connection between the charger body and the plug assembly.

3. A charger with foldable prongs according to claim 2, characterized in that, The linkage mechanism includes a first link and a second link; The first link is rotatably connected to the second link, one end of the first link is slidably connected to the plug assembly, and the other end of the first link is rotatably connected to the charger body; One end of the second link is rotatably connected to the plug assembly and electrically connected to the plug assembly, while the other end of the second link is slidably connected to the charger body and is used for electrical connection to the charger body.

4. A charger with foldable prongs according to claim 3, characterized in that, A sliding shaft is provided at one end of the first connecting rod connected to the plug assembly and / or at one end of the second connecting rod connected to the charger body; The plug assembly and / or the charger body are provided with guide grooves that match the sliding shaft.

5. A charger with foldable prongs according to claim 2 or 3, characterized in that, The charger body is provided with a conductive clip for achieving an electrical connection between the plug assembly and the charger body.

6. A charger with foldable prongs according to claim 2 or 3, characterized in that, The linkage mechanism includes an inner conductor layer and an outer insulating layer that surrounds the conductor layer.

7. A charger with foldable prongs according to claim 2, characterized in that, The pin assembly has a limiting groove that matches the linkage mechanism.

8. A charger with foldable plugs according to claim 1, characterized in that, The pin assembly includes pins, a pin socket, and a pin socket connection cover; The socket is fitted onto the socket connection cover, and the plug is located at the end of the socket connection cover away from the socket.

9. A charger with foldable prongs according to claim 8, characterized in that, The connector cover has a support surface that faces away from the connector. The charger body is used to have the side of the plug assembly that abuts against the abutting surface when the plug assembly is in use as the abutting surface, and the plane on which the abutting surface is located is used to be parallel or approximately parallel to the plane on which the abutting surface is located when the plug assembly is in the stored state.

10. A charger with foldable plugs according to claim 1, characterized in that, The charger body is also provided with an interface for connecting an external power cord.

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