Vehicle-mounted charging device

Abstract

The utility model relates to the technical field of new energy automobile charging, and provides a vehicle-mounted charging device which comprises a device body, a power line, a charging gun and a power taking assembly. The power line is used for connecting an external power supply. A control assembly is arranged in the device body, the power taking assembly is electrically connected with the control assembly, and a power supply interface for electrically connecting the to-be-powered equipment with the power taking assembly is formed in the device body. According to the vehicle-mounted charging device, through cooperative work of the power taking assembly and the control assembly, power taking from a vehicle can be achieved, power is supplied to electric equipment such as a mobile phone and an electric appliance through the power supply interface, the functional diversity of the vehicle-mounted charging device is increased, and the vehicle-mounted charging device has more practical functions. Meanwhile, the vehicle-mounted charging device provided by the embodiment of the utility model is compact in structure and good in portability.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicle charging, in particular to a vehicle-mounted charging device. Background Art

[0002] New energy vehicles are becoming an increasingly important component of the automotive market. With their increasing popularity, related charging technologies are also developing continuously. Among them, on-board charging devices can connect to external power outlets to charge new energy vehicles, allowing them to be charged even in locations without fixed charging stations. These on-board charging devices are easy to use and can be carried with the vehicle, offering excellent portability and flexibility. However, existing on-board charging devices are primarily used for charging vehicles and have relatively limited functionality. Utility Model Content

[0003] In view of this, the present invention provides a vehicle-mounted charging device to solve the problem of single function of existing vehicle-mounted charging devices.

[0004] In order to solve the above problems, the technical solution of the present utility model is achieved as follows:

[0005] A vehicle-mounted charging device comprises: a device body, internally provided with a control component for at least controlling the charging status; a power cord for connecting to an external power source to draw power, the power cord being connected to the device body and electrically connected to the control component; a charging gun for connecting to a vehicle to at least charge the vehicle, the charging gun being connected to the device body and electrically connected to the control component; a power drawing component being electrically connected to the control component to at least control the charging gun to draw power from the vehicle and supply power to the electrical equipment to be used; wherein a power supply interface is provided on the device body, the power supply interface being used for electrically connecting the electrical equipment to be used to the power drawing component.

[0006] In some embodiments, the device body includes: a base shell, the control component is arranged in the base shell, and the power cord and the charging gun are both connected to the base shell; a cover plate, a movable cover is arranged on the base shell; wherein the power supply interface is opened on the base shell and / or the cover plate, and the power supply component is arranged in the base shell or in the cover plate.

[0007] In some embodiments, the power supply interface is opened on the cover plate, and the power supply component is arranged inside the cover plate; wherein, a first wiring port is opened on the bottom shell, and a second wiring port is opened on the cover plate, and the on-board charging device also includes a connecting wire, one end of the connecting wire passes through the first wiring port and is electrically connected to the control component, and the other end of the connecting wire passes through the second wiring port and is electrically connected to the power supply component.

[0008] In some embodiments, a connecting boss is provided on the side of the bottom shell facing the cover plate, the first wiring port is opened on the connecting boss, a connecting groove is provided on the side of the cover plate facing the bottom shell, and the second wiring port is located in the connecting groove; or, a connecting groove is provided on the side of the bottom shell facing the cover plate, the first wiring port is located in the connecting groove, a connecting boss is provided on the side of the cover plate facing the bottom shell, and the second wiring port is opened on the connecting boss; wherein, the connecting boss is inserted into the connecting groove.

[0009] In some embodiments, the on-board charging device further includes: a rotating structure disposed between the cover plate and the bottom shell, and the cover plate rotates relative to the bottom shell via the rotating structure to cover or open the bottom shell.

[0010] In some embodiments, the rotation structure includes: a rotating shaft, which is arranged between the cover plate and the bottom shell to enable the cover plate to rotate relative to the bottom shell; a damping member, which is at least connected to the rotating shaft, and the damping member is used to increase friction resistance to locate the rotation position of the cover plate relative to the bottom shell.

[0011] In some embodiments, the on-board charging device further includes: a display, which is arranged on the bottom shell and / or the cover plate and is electrically connected to at least the control component, and the display is at least used to display the usage status of the on-board charging device.

[0012] In some embodiments, a power cord hole is provided on the bottom shell, and the power cord is movably inserted into the power cord hole to extend out of the bottom shell to connect to an external power source or be stored in the bottom shell; and / or, the on-board charging device also includes a handle for grasping when moving the on-board charging device, and the handle is provided on the bottom shell and / or the cover plate.

[0013] In some embodiments, the charging gun includes a gun head and a connecting wire, the gun head is used to connect to the vehicle, the connecting wire is connected between the control component and the gun head, and the bottom shell is provided with a storage groove for accommodating the gun head and a connecting wire hole for allowing the connecting wire to be movably passed through.

[0014] In some embodiments, the on-board charging device further includes: a cable reel seat disposed in the bottom shell, the cable reel seat being used to rotate and reel in or release the power cord and / or the connecting cable; a driving member disposed in the bottom shell and connected to the cable reel seat to drive the cable reel seat to rotate.

[0015] The embodiment of the present invention provides a vehicle-mounted charging device, including a device body, a power cord, a charging gun, and a power supply assembly. A control assembly is provided inside the device body, and the power supply assembly is electrically connected to the control assembly. The device body is provided with a power supply interface for electrically connecting the power-consuming device to the power supply assembly. The embodiment of the present invention can draw power from the vehicle through the coordinated work of the power supply assembly and the control assembly, and power mobile phones, electrical appliances, and other power-consuming devices through the power supply interface, thereby increasing the functional diversity of the vehicle-mounted charging device and providing the vehicle-mounted charging device with more practical functions. At the same time, the vehicle-mounted charging device provided by the embodiment of the present invention has a compact structure, good portability, and good ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a vehicle-mounted charging device provided by an embodiment of the present utility model;

[0017] Figure 2 It is a structural schematic diagram of the on-board charging device provided by an embodiment of the utility model from another perspective.

[0018] Description of reference numerals:

[0019] 1. Device body; 11. Power supply interface; 12. Bottom shell; 121. First wiring port; 122. Connection boss; 123. Power cord hole; 124. Storage slot; 125. Connection wire hole; 13. Cover; 131. Second wiring port; 132. Connection slot; 2. Power cord; 3. Charging gun; 31. Gun head; 32. Connection wire; 4. Connection wire; 5. Rotating structure; 6. Display; 7. Handle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0022] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to directions during normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not be the left-right directions during normal use.

[0023] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. "A plurality" means greater than or equal to two.

[0024] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a vehicle-mounted charging device, comprising a device body 1, a power cord 2, a charging gun 3 and a power collection component (not shown in the figure). A control component (not shown in the figure) is provided inside the device body 1 for at least controlling the charging state. The power cord 2 is used to connect to an external power source to draw power. The power cord 2 is connected to the device body 1 and is electrically connected to the control component. The charging gun 3 is used to connect to a vehicle to at least charge the vehicle. The charging gun 3 is connected to the device body 1 and is electrically connected to the control component. The power collection component is electrically connected to the control component to at least control the charging gun 3 to draw power from the vehicle and supply power to the electrical equipment to be used. Among them, a power supply interface 11 is provided on the device body 1, and the power supply interface 11 is used for electrically connecting the electrical equipment to be used to the power collection component.

[0025] Specifically, the control component refers to the core control circuit structure of the on-board charging device. The control component is typically able to monitor and control the operating status of each component of the on-board charging device based on user instructions or preset control logic, thereby ensuring that the on-board charging device is in normal operating condition. Specifically, the power collection component refers to the circuit structure of the on-board charging device used to draw power from the vehicle. The power collection component is electrically connected to the control component and can control the charging gun 3 to draw power from the vehicle according to the control component's instructions.

[0026] Specifically, the power cord 2 is a structure used to connect an external power source to charge the vehicle in a scenario where there is an external power source. The external power source is not limited to a dedicated charging pile for the vehicle, but can also be a mains socket, etc. It is only necessary to configure a corresponding connection plug at the connection end of the power cord 2. In this way, the vehicle does not need to be charged at a dedicated charging pile, and more charging scenarios can be used, which is conducive to timely replenishment of power for the vehicle. Specifically, the charging gun 3 is a structure that connects to the vehicle to charge the vehicle or draw power from the vehicle. The specific structure of the charging gun 3 is basically the same as that of the existing charging gun and will not be described in detail here. The charging gun 3 is electrically connected to the control component and can charge or draw power from the vehicle according to the instructions of the control component.

[0027] Specifically, the power supply interface 11 is used to connect the power-taking component to the power-taking device to be used, so that the power-taking device can draw power from the vehicle through the on-board charging device. The power-taking device can be a mobile electronic device such as a mobile phone or a laptop computer, or an electrical appliance such as a fan or a lamp. Optionally, the power supply interface 11 can be designed in the form of a USB interface, a mains socket, etc., and can be specifically designed according to actual needs. The configuration is relatively flexible and can be compatible with a variety of power-taking devices, with high adaptability. When power is needed, it is only necessary to connect the power-taking device to the power supply interface 11 and connect the charging gun 3 to the vehicle to establish a power transmission circuit between the power-taking device and the vehicle, so that power can be taken from the vehicle and supplied to the power-taking device. Optionally, a battery can also be provided on the on-board charging device, and the battery is at least electrically connected to the control component. When designed in this way, the battery can also be used to power the power-taking device or the vehicle, so that the on-board charging device acts as a mobile power source, further increasing the functional diversity of the on-board charging device.

[0028] The embodiment of the present invention provides a vehicle-mounted charging device, comprising a device body 1, a power cord 2, a charging gun 3 and a power supply assembly. A control assembly is provided inside the device body 1, and the power supply assembly is electrically connected to the control assembly. The device body 1 is provided with a power supply interface 11 for electrically connecting the power-consuming device to the power supply assembly. The embodiment of the present invention can not only charge the vehicle through the coordinated work of the power supply assembly and the control assembly, but also draw power from the vehicle and supply power to mobile phones, electrical appliances and other power-consuming devices through the power supply interface 11, thereby increasing the functional diversity of the vehicle-mounted charging device, expanding the applicable scenarios of the vehicle-mounted charging device, and improving the user experience. At the same time, the vehicle-mounted charging device provided by the embodiment of the present invention has a compact structure, and the weight and occupied space of the device can be similar to those of existing vehicle-mounted charging devices, and has good portability.

[0029] In some embodiments, such as Figure 1As shown, the device body 1 includes a bottom shell 12 and a cover plate 13, the control component is arranged in the bottom shell 12, the power cord 2 and the charging gun 3 are both connected to the bottom shell 12, and the cover plate 13 is movably arranged on the bottom shell 12. Among them, optionally, the power supply interface 11 can be opened on the bottom shell 12, and can also be opened on the cover plate 13, and can also be opened on the bottom shell 12 and the cover plate 13 at the same time. Optionally, the power supply component can be arranged in the bottom shell 12, and can also be arranged in the cover plate 13. In the above design, by using the cover plate 13 to cover the bottom shell 12, it can provide covering protection for the components inside the bottom shell 12, and can also improve the overall aesthetics. At the same time, the power supply interface 11 and the power supply component have a variety of optional setting methods, and the configuration is flexible.

[0030] In some embodiments, such as Figure 1 As shown, the power supply interface 11 is provided on the cover 13, the power supply assembly is provided inside the cover 13, and a first wiring port 121 is provided on the bottom shell 12, and a second wiring port 131 is provided on the cover 13. The on-board charging device also includes a connecting wire 4, one end of the connecting wire 4 passes through the first wiring port 121 to be electrically connected to the control assembly, and the other end of the connecting wire 4 passes through the second wiring port 131 to be electrically connected to the power supply assembly. Specifically, in order to realize the setting of the power supply assembly inside the cover 13, the cover 13 can be set to a hollow structure, a cavity is formed inside the cover 13, and the power supply assembly is set in the cavity of the cover 13. In the above design, the cover 13 adopts a hollow design, which can reduce weight, and can realize the setting of the power supply assembly inside the cover 13, making full use of the internal space of the cover 13, thereby making the overall structure of the on-board charging device more compact.

[0031] In some embodiments, such as Figure 1As shown, a connecting boss 122 is provided on the side of the bottom shell 12 facing the cover plate 13, a first wiring port 121 is provided on the connecting boss 122, a connecting groove 132 is provided on the side of the cover plate 13 facing the bottom shell 12, a second wiring port 131 is located in the connecting groove 132, and the connecting boss 122 is inserted into the connecting groove 132. In other embodiments, similarly, a connecting groove 132 is provided on the side of the bottom shell 12 facing the cover plate 13, the first wiring port 121 is located in the connecting groove 132, a connecting boss 122 is provided on the side of the cover plate 13 facing the bottom shell 12, a second wiring port 131 is provided on the connecting boss 122, and the connecting boss 122 is inserted into the connecting groove 132. The above embodiment enables the connecting boss 122 to be inserted into the connecting groove 132 when the cover plate 13 is placed on the bottom shell 12, thereby achieving a better fit between the cover plate 13 and the bottom shell 12. Moreover, when the connecting boss 122 is inserted into the connecting groove 132, the first wiring port 121 and the second wiring port 131 fit together, and the connecting wire 4 can be completely stored inside the bottom shell 12 and the cover 13 without occupying the space outside the device. The structure is more compact and more convenient to carry.

[0032] In some embodiments, such as Figure 1 As shown, the on-board charging device also includes a rotating structure 5, which is disposed between the cover plate 13 and the bottom shell 12. The cover plate 13 rotates relative to the bottom shell 12 via the rotating structure 5 to cover or open the bottom shell 12. Specifically, the rotating structure 5 can take various forms, such as a hinge or a hinge. Alternatively, the rotating structure 5 can be fixed to the cover plate 13 and rotatably connected to the bottom shell 12; or fixed to the bottom shell 12 and rotatably connected to the cover plate 13. When the rotating structure 5 has two relatively rotatable parts, the two parts can be fixed to the bottom shell 12 and the cover plate 13, respectively. Any rotation of the cover plate 13 relative to the bottom shell 12 is sufficient. By adopting the design of the above embodiment, the cover plate 13 can be flipped relative to the bottom shell 12, thereby opening the bottom shell 12 for use or closing it for storage and portability as needed. This simple structure is easy to implement and convenient to use and carry.

[0033] In some embodiments, the rotating structure 5 includes a rotating shaft and a damping member. The rotating shaft is arranged between the cover 13 and the bottom shell 12 to enable the cover 13 to rotate relative to the bottom shell 12. The damping member is at least connected to the rotating shaft, and the damping member is used to increase the friction resistance to locate the rotation position of the cover 13 relative to the bottom shell 12. Optionally, the damping member can be in the form of a spring steel sheet, a rubber gasket, etc., and progressive damping can also be used, that is, as the rotation angle of the cover 13 increases, the damping force also gradually increases, thereby providing greater resistance when the cover 13 approaches a fully open or closed position, further enhancing stability. The specific selection can be based on factors such as the required damping effect and cost. The connection between the cover 13 and the bottom shell 12 can be designed with a groove or a flange to adapt to the shape of the rotating shaft and the damping member to ensure precise fit when the cover 13 rotates. The above embodiment utilizes a damping element to increase frictional resistance, thereby improving the stability of the cover 13 when adjusting its angle of use. This prevents it from becoming loose and effectively prevents the cover 13 from flipping too quickly and colliding violently with the bottom case 12 or other objects. Furthermore, the user can flip the cover 13 to any angle as needed, with the damping element maintaining the desired position, providing high adjustability and a good user experience.

[0034] It should be noted that, in addition to the damping element employed in the aforementioned embodiment, other methods can be employed to adjust and maintain the angle of rotation of the cover plate 13. For example, a snap-fit ​​structure with multiple latching positions can be employed, or a telescopic rod supported between the cover plate 13 and the placement surface of the bottom housing 12 can be provided, and the length of the telescopic rod can be adjusted, etc. Therefore, it can be understood that the rotation structure 5 has a variety of design options, providing a high degree of design flexibility.

[0035] In some embodiments, such as Figure 2 As shown, the on-board charging device also includes a display 6, which is arranged on the bottom shell 12 and / or the cover plate 13 and is electrically connected to at least the control component. The display 6 is at least used to display the usage status of the on-board charging device. Specifically, the user can understand the usage status of the on-board charging device through the display content of the display 6, including but not limited to the current power level of the vehicle, the charging status, the health of the vehicle battery, etc. In some design schemes, the display 6 can also be a touch-enabled display screen, and the user can directly touch the display screen for interactive operations. In some design schemes, the display 6 can also be connected to mobile terminal devices such as mobile phones through wireless communication technology, so that the user can operate and control the operation of the on-board charging device on the mobile terminal device. The above embodiment uses the display 6 to better realize the information display and data interaction of the on-board charging device, and the user can more intuitively understand the charging status and other related information and respond in time.

[0036] In some embodiments, such as Figure 2As shown, the bottom shell 12 is provided with a power cord hole 123. The power cord 2 is movably arranged in the power cord hole 123, extending from the bottom shell 12 to connect to an external power source or being stored within the bottom shell 12. Through the design of this embodiment, the power cord 2 can be stored inside the bottom shell 12 when not in use, eliminating the need for external space and facilitating the portability of the vehicle-mounted charger. Furthermore, the bottom shell 12 provides good protection for the power cord 2, improving reliability.

[0037] In some embodiments, such as Figure 1 As shown, the on-board charging device also includes a handle 7 for grasping when moving the on-board charging device. The handle 7 is provided on the bottom shell 12 and / or the cover plate 13. By providing the handle 7 on the bottom shell 12 and / or the cover plate 13 in the above embodiment, the user can grasp the handle 7 and lift the device when carrying the on-board charging device, making it more convenient and labor-saving.

[0038] In some embodiments, such as Figure 1 As shown, the charging gun 3 includes a gun head 31 and a connecting wire 32. The gun head 31 is used to connect to the vehicle. The connecting wire 32 is connected between the control component and the gun head 31. The bottom shell 12 is provided with a storage groove 124 for accommodating the gun head 31 and a connecting wire hole 125 for the connecting wire 32 to be movably passed through. In the above embodiment, the storage groove 124 is provided on the bottom shell 12, so that the gun head 31 can be stored, which saves the space occupied by the gun head 31 when stored, and the structure is more compact, further improving portability. In addition, by providing the connecting wire hole 125, similar to the power line hole 123, the connecting wire 32 is movably passed through the connecting wire hole 125, so that it can be stored inside the bottom shell 12 when not in use, without occupying external space, making it convenient to carry the on-board charging device, and also enabling the bottom shell 12 to provide good protection for the connecting wire 32, thereby improving reliability.

[0039] In some embodiments, the on-board charging device further includes a cable reel and a driver (not shown in the figure). The cable reel is disposed within the bottom housing 12 and is used to rotate and reel in or release the power cord 2 and / or the connecting cable of the charging gun 3. The driver is disposed within the bottom housing 12 and is connected to the cable reel to drive the cable reel to rotate. Specifically, the driver can generally be a component such as a motor for providing power. When the driver is started, the cable reel rotates, and the cable reel drives the cable wound around itself to move. Depending on the direction of rotation, the cable can be reeled in or released. Optionally, the method for controlling the start or stop of the driver can be a button trigger, touch control through the display 6, remote control through a terminal device such as a mobile phone, or triggering when the cover 13 is closed on the bottom housing 12 by a logic circuit. As long as the driver can be controlled to start and stop according to demand to achieve automatic reeling or releasing of the cable, it is sufficient. The above design, by using a cable reel and a driver, can achieve automatic cable reeling without the need for manual operation to reel in the cable, making it easy to operate and providing a good user experience. Furthermore, the above design can reel the cable onto the cable reel, effectively avoiding the problem of messy cable entanglement.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vehicle-mounted charging device, characterized in that: include: The device body is provided with a control component at least for controlling the charging state; A power cord, used to connect to an external power source to draw power, the power cord being connected to the device body and electrically connected to the control component; a charging gun, used to connect to a vehicle to at least charge the vehicle, the charging gun being connected to the device body and electrically connected to the control assembly; A power taking component, electrically connected to the control component, to at least control the charging gun to take power from the vehicle and supply power to the electrical equipment to be used; Wherein, a power supply interface is provided on the device body, and the power supply interface is used for electrically connecting the power-using device to be used with the power-taking component.

2. The on-board charging device according to claim 1, characterized in that: The device body comprises: A bottom shell, wherein the control assembly is disposed in the bottom shell, and the power cord and the charging gun are both connected to the bottom shell; A cover plate, a movable cover is provided on the bottom shell; The power supply interface is provided on the bottom shell and / or the cover plate, and the power taking component is arranged in the bottom shell or in the cover plate.

3. The on-board charging device according to claim 2, characterized in that: The power supply interface is provided on the cover plate, and the power taking component is provided inside the cover plate; Among them, a first wiring port is provided on the bottom shell, a second wiring port is provided on the cover plate, and the on-board charging device also includes a connecting wire, one end of the connecting wire passes through the first wiring port and is electrically connected to the control component, and the other end of the connecting wire passes through the second wiring port and is electrically connected to the power collection component.

4. The on-board charging device according to claim 3, characterized in that: A connecting boss is provided on a side of the bottom shell facing the cover plate, the first wiring port is provided on the connecting boss, a connecting groove is provided on a side of the cover plate facing the bottom shell, and the second wiring port is located in the connecting groove; or a connecting groove is provided on a side of the bottom shell facing the cover plate, the first wiring port is located in the connecting groove, a connecting boss is provided on a side of the cover plate facing the bottom shell, and the second wiring port is provided on the connecting boss; Wherein, the connecting boss is inserted into the connecting groove.

5. The on-board charging device according to claim 2, characterized in that: The on-board charging device further includes: The rotating structure is arranged between the cover plate and the bottom shell. The cover plate rotates relative to the bottom shell through the rotating structure to cover or open the bottom shell.

6. The on-board charging device according to claim 5, characterized in that: The rotating structure includes: a rotating shaft, disposed between the cover plate and the bottom shell, so as to enable the cover plate to rotate relative to the bottom shell; A damping member is connected to at least the rotating shaft, and is used to increase friction resistance to locate the rotation position of the cover plate relative to the bottom shell.

7. The on-board charging device according to claim 2, characterized in that: The on-board charging device further includes: A display is provided on the bottom shell and / or the cover plate and is at least electrically connected to the control component. The display is at least used to display the usage status of the on-board charging device.

8. The on-board charging device according to claim 2, characterized in that: A power cord hole is provided on the bottom shell, and the power cord is movably inserted into the power cord hole to extend out of the bottom shell to connect to an external power source or be stored in the bottom shell; and / or, The on-vehicle charging device further includes a handle for gripping when moving the on-vehicle charging device, and the handle is provided on the bottom shell and / or the cover plate.

9. The on-board charging device according to claim 2, characterized in that: The charging gun includes a gun head and a connecting wire. The gun head is used to connect to the vehicle. The connecting wire is connected between the control component and the gun head. The bottom shell is provided with a storage groove for accommodating the gun head and a connecting wire hole for the connecting wire to be movably passed through.

10. The on-board charging device according to claim 9, characterized in that: The on-board charging device further includes: A wire reel seat is provided in the bottom shell and is used for rotating and reeling in or releasing the power cord and / or the connecting wire; The driving member is arranged in the bottom shell and connected to the winding seat to drive the winding seat to rotate.

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