Charging device

Abstract

A charging device (1), comprising a housing (10), a winding reel (20), and a charging assembly (30). The housing (10) is provided with an accommodating cavity (15) and a cable outlet (16) communicated with the accommodating cavity (15). The winding reel (20) is located in the accommodating cavity (15), and comprises a winding post (21) rotatably connected to the housing (10). The charging assembly (30) comprises a charging cable (31) located in the accommodating cavity (15) and a power plug (32) located outside the housing (10). A first end of the charging cable (31) passes through the cable outlet (16) to be connected to the power plug (32), and a second end of the charging cable (31) is connected to the winding post (21). The charging cable (31) comprises an insulating layer (311), a coil spring (312), and a conductive wire body (313). The conductive wire body (313) and the coil spring (312) are located in the insulating layer (311), and are both wound around the periphery of the winding post (21). By means of the charging device (1), the occupied space is reduced, and the risk of tangling and knotting of the conductive wire body (313) during storage is reduced.

Description

A charging device

[0001] Related applications

[0002] This application claims priority to the following Chinese patent applications:

[0003] Application No. 202421188043.2, filed on May 28, 2024, entitled "A Charging Device"; and Application No. 202421235638.9, filed on May 31, 2024, entitled "A Charging Device";

[0004] The full text of the aforementioned patent is incorporated herein by reference. Technical Field

[0005] This application relates to the field of power cord storage technology, and more particularly to a charging device. Background Technology

[0006] As the use of portable electronic devices (such as mobile phones, iPads, laptops, handheld game consoles, etc.) becomes more and more frequent in daily life and work, there are also more and more charging cables for charging these portable electronic devices. Therefore, when carrying them out, users will use some storage bags or storage boxes for storage. However, these storage products are generally bulky and inconvenient for users to carry around. Summary of the Invention

[0007] This application provides a charging device that reduces the size of the charging device, making it easier for users to carry.

[0008] This application provides a charging device, including:

[0009] The housing has a receiving cavity and a cable outlet communicating with the receiving cavity;

[0010] A winding reel is located in the receiving cavity, and the winding reel includes a winding post, which is rotatably connected to the housing;

[0011] The charging assembly includes a charging cable located within a receiving cavity and a power connector located outside the housing. A first end of the charging cable passes through the outlet and connects to the power connector, and a second end of the charging cable is connected to the winding post. The charging cable includes an insulating layer, a coil spring, and a conductive wire. The conductive wire and the coil spring are both located within the insulating layer, and both the conductive wire and the coil spring are wound around the periphery of the winding post.

[0012] The beneficial effects of this embodiment are as follows: By integrating the conductive wire and the coil spring into one unit, the conductive wire can be automatically wound up and shaped by the coil spring during storage. Since both the conductive wire and the coil spring are housed within the same insulating layer, the space occupied by the charging device can be reduced, thus reducing the overall size of the charging device. Furthermore, the conductive wire is wound along the extension direction of the coil spring, reducing the likelihood of tangling and knotting during storage, thereby facilitating user use and portability of the charging device. Simultaneously, this embodiment includes a winding reel inside the housing. The rotation of the charging cable drives the winding reel to rotate, and the winding reel moves synchronously with the charging cable. Therefore, the winding reel and the charging cable can remain relatively stationary. The sidewalls of the winding reel provide more adequate restraint for the charging cable, allowing the winding reel to better provide storage space and protection for the charging cable, further reducing the likelihood of tangling when the charging cable rotates within the housing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 is a schematic diagram of the structure of a charging device in one embodiment of this application;

[0015] Figure 2 is an exploded structural diagram of a charging device in one embodiment of this application;

[0016] Figure 3 is a schematic diagram of the structure of the winding spool, charging component and locking component in one embodiment of this application;

[0017] Figure 4 is a schematic diagram of the structure of the base and output part of the housing in one embodiment of this application;

[0018] Figure 5 is a schematic diagram of the structure of the winding reel and part of the charging component in one embodiment of this application;

[0019] Figure 6 is a schematic diagram of the structure of a portion of the charging device in one embodiment of this application;

[0020] Figure 7 is a schematic diagram of the structure of a charging device in one embodiment of this application;

[0021] Figure 8 is a schematic diagram of the structure of a portion of the charging device in one embodiment of this application;

[0022] Figure 9 is an exploded structural diagram of the charging device in one embodiment of this application;

[0023] Figure 10 is a cross-sectional structural diagram of the base, winding disc and friction element in one embodiment of this application;

[0024] Figure 11 is a cross-sectional structural diagram of the base, winding disc and friction element in another embodiment of this application;

[0025] Figure 12 is a cross-sectional structural diagram of the base, winding disc and friction element in one embodiment of this application;

[0026] Figure 13 is a cross-sectional view of the base, winding disc and friction element after assembly in one embodiment of this application;

[0027] Figure 14 is a structural schematic diagram of the base and friction element in one embodiment of this application;

[0028] Figure 15 is a structural schematic diagram of the base and friction element in one embodiment of this application;

[0029] Figure 16 is a schematic diagram of the winding reel in one embodiment of this application. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, a clear and complete description will be provided below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] Example 1:

[0032] When carrying their devices out and about, users often use storage products to organize various charging cables, such as storage bags or boxes. However, these storage products are generally bulky, and users need to manually roll up the charging cables. The charging cables are prone to tangling and knotting during storage, which is not only inconvenient for users to carry around, but also makes the process of organizing the charging cables cumbersome.

[0033] In view of the above situation, please refer to Figures 1-2. This application proposes a charging device 1, including a housing 10, a winding reel 20 and a charging assembly 30.

[0034] The housing 10 has a receiving cavity 15 and a cable outlet 16 communicating with the receiving cavity 15. The winding spool 20 is located in the receiving cavity 15. The receiving cavity 15 can provide installation space for the winding spool 20 and the charging assembly 30. The winding spool 20 includes a winding post 21, which is rotatably connected to the housing 10. That is, the winding spool 20 can rotate relative to the housing 10 about the axis of the winding post 21.

[0035] The charging assembly 30 includes a charging cable 31 located in the receiving cavity 15 and a power connector 32 located outside the housing 10. The first end of the charging cable 31 passes through the outlet 16 and is connected to the power connector 32. That is, the outlet 16 is used to allow the charging cable 31 to extend out of the receiving cavity 15 and be electrically connected to the power connector 32 to connect to external devices. The second end of the charging cable 31 is connected to the winding post 21. When the first end of the charging cable 31 is pulled by an external force, the charging cable 31 can drive the winding reel 20 to rotate relative to the housing 10.

[0036] As shown in Figure 3, the charging cable 31 includes an insulating layer 311, a coil spring 312, and a conductive wire 313. The conductive wire 313 and the coil spring 312 are both located inside the insulating layer 311. It is easy to understand that the insulating layer 311 covers the outside of the coil spring 312 and the conductive wire 313. The insulating layer 311 can provide insulation protection for the conductive wire 313, reduce the external damage to the conductive wire 313, and the setting of the insulating layer 311 can also reduce electric shock accidents. Both the conductive wire 313 and the coil spring 312 are wound around the periphery of the winding post 21. The winding reel 20 has a winding space 22. The coil spring 312 is used to wind up the conductive wire 313. Therefore, the coil spring 312 and the conductive wire 313 can both be wound in the winding space 22. The conductive wire 313 can be pulled out of the winding space 22 from the position of the outlet 16 by an external force. After the external force is lost, the conductive wire 313 can be wound up and reset to the winding space 22 under the elastic force of the coil spring 312.

[0037] For example, the coil spring 312 is bonded and fixed to the conductive wire 313, the first end of the insulating layer 311 and the conductive wire 313 passes through the outlet 16 and is connected to the power connector 32, and the second end of the insulating layer 311 and the coil spring 312 are both connected to the winding post 21; or, the first end of the insulating layer 311, the coil spring 312 and the conductive wire 313 all pass through the outlet 16 and are connected to the power connector 32, and the second end of the coil spring 312 is connected to the winding post 21.

[0038] It should be noted that, in this embodiment of the application, by setting both the conductive wire 313 and the coil spring 312 inside the insulating layer 311, the conductive wire 313 can be automatically wound up with the coil spring 312 when stored. Since the conductive wire 313 and the coil spring 312 are both set in the same insulating layer 311, the space occupied by the charging device 1 can be reduced, thereby reducing the volume of the charging device 1. Furthermore, the conductive wire 313 is stored along the extension direction of the coil spring 312, which can reduce the tangling and knotting of the conductive wire 313 when stored, thus facilitating the user's use and carrying of the charging device 1. Meanwhile, in this embodiment, a winding disc 20 is provided inside the housing 10. The rotation of the charging cable 31 can drive the winding disc 20 to rotate. The winding disc 20 can move synchronously with the charging cable 31, so the winding disc 20 and the charging cable 31 can be relatively stationary. Moreover, the side wall of the winding disc 20 can provide more sufficient restraint for the charging cable 31, thereby enabling the winding disc 20 to better provide storage space and protection for the charging cable 31, further reducing the situation where the charging cable 31 gets tangled when rotating inside the housing 10.

[0039] As shown in Figure 2, the housing 10 includes a base 11 and a cover 14. The base 11 and the cover 14 enclose a receiving cavity 15. The cover 14 is detachably connected to the base 11 to facilitate adjustment or maintenance of the winding reel 20 and the charging assembly 30 within the receiving cavity 15. A positioning post 117 is provided on the base 11. The winding post 21 is sleeved on the positioning post 117 and rotatably connected to the positioning post 117. The positioning post 117 provides a base for the rotation of the winding reel 20. The shape of the receiving cavity 15 can be cylindrical, and the axis of the positioning post 117 coincides with the axis of the housing 10.

[0040] As shown in Figure 3, in some embodiments of this application, the insulating layer 311 and the conductive wire 313 are both bonded to the coil spring 312, and the coil spring 312 is provided with a plurality of fixing holes 3121, which are spaced apart.

[0041] It is understandable that the conductive wire 313 is electrically connected to the plug 32. The coil spring 312 may or may not be connected to the plug 32. When the charging device 1 is in use, the charging cable 31 needs to be pulled frequently. During the pulling process, the insulating layer 311, the conductive wire 313, and the coil spring 312 will all be under stress. The coil spring 312 and the conductive wire 313 are bonded and fixed inside the insulating layer 311 by adhesive coating. The adhesive can also bond to the insulating layer 311 and the conductive wire 313 through the fixing hole 3121 on the coil spring 312, increasing the bonding area between the coil spring 312 and the insulating layer 311 and the conductive wire 313. This makes the connection between the coil spring 312 and the insulating layer 311 and the conductive wire 313 more stable and reduces the possibility of the coil spring 312 shifting inside the insulating layer 311.

[0042] Please refer to Figures 2-3. In some embodiments of this application, the winding reel 20 further includes a conductive post 24, which is located inside the winding post 21 and connected to it. The first end of the conductive wire 313 is electrically connected to the power connector 32, and the second end of the conductive wire 313 is electrically connected to the conductive post 24.

[0043] It is understood that the winding post 21 has a mounting cavity and a mounting rod. The conductive post 24 is located inside the mounting cavity of the winding post 21 and is sleeved on the mounting rod. This allows the winding post 21 to provide mounting space and a stable base for the conductive post 24. Furthermore, this embodiment utilizes the mounting cavity space of the winding post 21 to house the conductive post 24, thus making fuller use of the space in the charging device 1 and reducing its size. The conductive post 24 can rotate relative to the housing 10 along with the winding post 21. The side of the winding disc 20 has an opening communicating with the winding space 22. The second end of the conductive wire 313 passes through this opening from the winding space 22 and is electrically connected to the conductive post 24 located inside the winding post 21.

[0044] The charging assembly 30 also includes an output section 33, at least a portion of which is located in the receiving cavity 15 and connected to the housing 10. The output section 33 includes a conductive sheet 331, which is in conductive contact with the conductive post 24. Specifically, the portion of the output section 33 that is electrically connected to the conductive post 24 is located within the receiving cavity 15, so that the output section 33 can stably supply power. When the conductive post 24 rotates together with the winding post 21, the conductive sheet 331 can always be in contact with the conductive post 24 and conduct electricity. For example, the conductive sheet 331 can be an elastic element, so that the conductive sheet 331 can abut against the conductive post 24, that is, there is a force between the conductive sheet 331 and the conductive post 24, so that the conductive sheet 331 can still stably conduct electricity with the conductive post 24 when the conductive post 24 rotates.

[0045] It should be noted that the output unit 33 can be used to connect to an external power source or electronic device. For example, the output unit 33 includes a first plug. When the charging device 1 charges electronic devices such as mobile phones or computers, the power plug 32 is connected to the mobile phone or computer, and the first plug is connected to a socket or other power source to charge the mobile phone or computer. Alternatively, the charging device 1 is installed on an electrical appliance such as a television, refrigerator, or washing machine. The output unit 33 includes an electrical connection line, which is directly electrically connected to the electrical appliance. The power plug 32 is connected to a socket or other power source to charge the electrical appliance.

[0046] Further, please continue to refer to Figures 2-3. In some embodiments of this application, the conductive post 24 includes a post body 241 and a conductive trace 242. The axis of the post body 241 coincides with the axis of the winding post 21, and the conductive trace 242 is arranged around the outside of the post body 241.

[0047] Specifically, the conductive post 24 can rotate relative to the housing 10 along with the winding post 21, and the conductive post 24 rotates around the axis of the post 21. At this time, the conductive trace 242 located outside the post 241 also rotates together. On the outside of the post 241, the conductive trace 242 wraps around the post multiple times, and the multiple turns of the conductive trace 242 are arranged in a direction parallel to the axis of the post 241.

[0048] The conductive sheet 331 is provided with multiple conductive contacts 332, which are arranged in a direction parallel to the axis of the column 241. Each conductive contact 332 can make conductive contact with a circle of conductive wires 242. When the entire conductive column 24 rotates, the conductive wires 242 and the conductive contacts 332 are always in conductive contact, thereby ensuring stable conductivity between the output part 33 and the conductive wire 313.

[0049] Please refer to Figures 3-4. In some embodiments of this application, the charging device 1 further includes a first locking assembly 40, which includes a first locking member 41 and a second locking member 42. The first locking member 41 is disposed on the housing 10, and the second locking member 42 is disposed on the winding reel 20.

[0050] The first locking member 41 is rotatably connected to the housing 10 and slidably connected to the winding reel 20. When the first locking member 41 and the winding reel 20 slide relative to each other, the first locking member 41 can also swing relative to the housing 10. In this embodiment, the specific swing angle of the first locking member 41 relative to the housing 10 is not limited.

[0051] Specifically, when the winding reel 20 rotates, it drives the second locking member 42 to rotate, and the winding reel 20 slides relative to the first locking member 41. The rotation trajectory of the second locking member 42 has sequentially arranged locking and unlocking positions. When the second locking member 42 rotates to the locking position, the first locking member 41 can rotate relative to the housing 10, that is, the first locking member 41 swings relative to the housing 10. At this time, the first locking member 41 locks with the second locking member 42. The first locking member 41 engages with the housing 10 to lock the winding reel 20 in place, preventing the charging cable 31 from being pulled out of the winding space 22. When the second locking member 42 rotates to the unlocked position, the first locking member 41 can rotate again relative to the housing 10, i.e., the first locking member 41 swings relative to the housing 10 again. At this point, the first locking member 41 and the second locking member 42 unlock, allowing the winding reel 20 to unlock and rotate, and the charging cable 31 can then be pulled out of the winding space 22. Specifically, the locking position can be designed according to usage requirements, so that the charging cable 31 and the housing 10 can be relatively fixed in the required position.

[0052] Further, please refer to Figures 4-6. In some embodiments of this application, the first locking member 41 includes a hook portion 411, and the second locking member 42 has a hook groove 421. When the second locking member 42 is in the locked position, the hook portion 411 engages with the hook groove 421 to achieve locking between the winding reel 20 and the housing 10. When the second locking member 42 is in the unlocked position, the hook portion 411 separates from the hook groove 421 to achieve unlocking and rotation of the winding reel 20 and the housing 10. Understandably, when the second locking member 42 is in the locked position, the hook part 411 engages with the hook groove 421. At this time, the conductive wire 313 and the coil spring 312 cannot be pulled out from the winding space 22. When the second locking member 42 slides from the locked position to the unlocked position, the hook part 411 can separate from the hook groove 421. At this time, the conductive wire 313 is retracted into the winding space 22 under the elastic force of the coil spring 312. The locking and unlocking of the hook part 411 and the hook groove 421 are convenient and quick, making the use of the first locking assembly 40 more convenient.

[0053] Furthermore, referring to Figures 4-6, in some embodiments of this application, a guide groove 23 is provided on the side of the winding reel 20 facing the first locking member 41. The guide groove 23 is arranged around the axis of the winding post 21. The rotation of the winding reel 20 drives the guide groove 23 to rotate, thereby allowing the first locking member 41 to slide within the guide groove 23, and the first locking member 41 can rotate relative to the housing 10. The second locking member 42 is disposed within the guide groove 23, and the hook groove 421 communicates with the guide groove 23, thereby allowing the hook part 411 to switch between sliding between the hook groove 421 and the guide groove 23.

[0054] When the second locking member 42 moves from the locked position to the unlocked position, the hook part 411 moves from the hook groove 421 to the guide slide groove 23, and the hook part 411 can slide along the guide slide groove 23. The guide slide groove 23 can provide guidance and limit for the sliding of the hook part 411, preventing the hook part 411 from shifting or misaligning during sliding.

[0055] Specifically, as shown in Figure 5, the guide groove 23 is preferably set as an annular shape. Taking the elastic force of the coil spring 312 extending in a counterclockwise direction as an example, the charging cable 31 is pulled out from the winding space 22 in a clockwise direction. At this time, the hook groove 421 is located on the right side of the second locking member 42. The engagement between the hook groove 421 and the hook part 411 can prevent the coil spring 312 from rotating in a counterclockwise direction.

[0056] Please refer to Figures 5-6. In some embodiments of this application, the first locking assembly 40 further includes a separator 43. The separator 43 is disposed within the guide slide groove 23 and divides the guide slide groove 23 into a coaxial first slide groove 231 and a second slide groove 232. The engaging portion 411 can slide in the first slide groove 231 and the second slide groove 232. The separator 43 has a first notch 431. The second locking member 42 is located at the first notch 431. The two ends of the second locking member 42 and the two ends of the separator 43 together form a first channel 432 and a second channel 433. That is, the second locking member 42 divides the first notch 431 into a first channel 432 and a second channel 433. The first channel 432 connects the first slide groove 231 and the second slide groove 232, and the second channel 433 also connects the first slide groove 231 and the second slide groove 232. The hook groove 421 can be located in the first channel 432 or the second channel 433, and the hook part 411 can switch between the first slide groove 231 and the second slide groove 232 through the first channel 432 or the second channel 433.

[0057] A first protrusion 233 is provided on the side wall of the first slide groove 231. The first protrusion 233 protrudes towards the position of the first channel 432. The first protrusion 233 can change the movement trajectory of the hook part 411 in the first slide groove 231. A second protrusion 234 is provided on the side wall of the second slide groove 232. The second protrusion 234 protrudes towards the position of the second channel 433. The second protrusion 234 can change the movement trajectory of the hook part 411 in the second slide groove 232.

[0058] It should be noted that, taking the first groove 231 on the outer ring of the second groove 232, the hook groove 421 located in the first channel 432, and the elastic force of the coil spring 312 extending in a counterclockwise direction as an example, when the charging cable 31 is stored in the winding space 22, the second locking member 42 rotates to the locking position, and the hook part 411 hooks into the hook groove 421; when a force is applied to the charging cable 31 toward the outside of the receiving cavity 15, this force overcomes the elastic force of the coil spring 312 and drives the winding disc 20 to rotate in a clockwise direction. At this time, the hook groove 421 separates from the hook part 411, and the hook part 411 slides relative to the winding disc 20. The hook part 411 separates from the hook groove 421 and enters the first channel 432. Since the first protrusion 233 protrudes toward the first channel 432, the hook part 411 will enter the second groove 232 under the obstruction of the first protrusion 233 and slide in the second groove 232. Similarly, the second protrusion 234 in the second groove 232 will block the hook part 411, thereby changing the movement trajectory of the hook part 411, so that the hook part 411 moves from the second groove 232 through the second channel 433 to the first groove 231. The first protrusion 233 in the first groove 231 will also block the hook part 411, thereby changing the movement trajectory of the hook part 411, so that the hook part 411 moves from the first groove 231 through the first channel 432 to the second groove 232. Until the charging cable 31 loses the external force, when the hook part 411 slides in the first groove 231 to the position of the second protrusion 234, the coil spring 312 drives the winding disc 20 to make the hook part 411 slide in the opposite direction and fall into the hook groove 421 in the first channel 432, so that the hook groove 421 and the hook part 411 lock together again to prevent the charging cable 31 from retracting the winding space 22 during use. If it is necessary to retract the charging cable 31 into the winding space 22, the charging cable 31 can be pulled again to separate the hook part 411 from the hook groove 421, that is, the winding disc 20 is unlocked from the housing 10, so that the charging cable 31 can be retracted into the winding disc 20 under the elastic force of the coil spring 312.

[0059] Further, referring to FIG5, in some embodiments, the separator 43 has a first free end 434 and a second free end 435, and a first notch 431 is defined between the first free end 434 and the second free end 435. Both the first free end 434 and the second free end 435 are provided with guide slopes 426, which are used to guide the sliding of the engaging part 411 so that the engaging part 411 can switch between the first sliding groove 231 and the second sliding groove 232.

[0060] For example, a first channel 432 is formed between the first free end 434 and one end of the second locking member 42, and the guide slope 426 on the first free end 434 is inclined toward the direction of the second slide groove 232; a second channel 433 is formed between the second free end 435 and the other end of the second locking member 42, and the guide slope 426 on the second free end 435 is inclined toward the direction of the first slide groove 231.

[0061] Example 2:

[0062] In related technologies, there are many automatic charging cable retractor products. Since most automatic cable retractors use spring stress to retract the cable, the retracting speed is too fast. For example, if the user does not pay attention to the retracting process, the charging cable is pulled back quickly by the retractor. Due to the large impact force, the user is easily injured or scratched on the charging head.

[0063] In view of the above situation, please refer to Figures 7-9. This application proposes a charging device 1, including a housing 10, a winding reel 20, a charging component 30, and a friction element 60.

[0064] The housing 10 includes a base 11; a winding disc 20 is disposed on the base 11, the base 11 provides a mounting base for the winding disc 20, the winding disc 20 is rotatably connected to the base 11, the winding disc 20 can rotate relative to the first axis L1 of the base 11, the base 11 and the winding disc 20 can both be cylindrical, the base 11 can also be square column, and the first axis L1 is the central axis of the base 11.

[0065] The charging assembly 30 includes a conductive wire 313, a power connector 32, and a coil spring 312. The first end of the conductive wire 313 is electrically connected to the power connector 32, and the first end of the coil spring 312 is connected to the base 11. The second ends of both the conductive wire 313 and the coil spring 312 are connected to a winding reel 20. Both the conductive wire 313 and the coil spring 312 are wound around the periphery of the winding reel 20. The winding reel 20 has a winding space 22, within which the conductive wire 313 is wound, providing storage and protection for the conductive wire 313. The first end of the conductive wire 313 can be stretched out of the winding space 22 by an external force. At this time, the conductive wire 313 can drive the winding disc 20 to rotate relative to the base 11. At the same time, the winding disc 20 drives the coil spring 312 to rotate, so that the coil spring 312 undergoes elastic deformation. After the external force is removed, the conductive wire 313 and the winding disc 20 can rotate under the elastic force of the coil spring 312, and the conductive wire 313 is wound up and returned to the winding space 22.

[0066] In this embodiment, a winding disc 20 is provided on the base 11. The rotation of the conductive wire 313 can drive the winding disc 20 to rotate, that is, the winding disc 20 can move synchronously with the conductive wire 313. Therefore, the winding disc 20 and the conductive wire 313 can be relatively stationary, and the side wall of the winding disc 20 can provide more sufficient restraint for the conductive wire 313, so that the winding disc 20 can better provide storage space and protection for the conductive wire 313, and reduce the situation where the conductive wire 313 gets tangled when rotating.

[0067] As shown in Figure 10, a friction element 60 is provided between the base 11 and the winding reel 20. The friction element 60 abuts against the winding reel 20 and the base 11, so that when the winding reel 20 rotates relative to the base 11, the friction element 60 can provide frictional resistance, thereby reducing the relative rotational speed between the winding reel 20 and the base 11.

[0068] For example, the base 11 and the winding reel 20 can be spaced apart, the friction element 60 is disposed on the base 11 and abuts against the winding reel 20, and the winding reel 20 generates frictional resistance with the friction element 60 when it rotates. Alternatively, the friction element 60 is disposed on the winding reel 20 and abuts against the base 11, and the winding reel 20 drives the friction element 60 to rotate when it rotates, so that the friction element 60 generates frictional resistance with the base 11. For another example, the base 11 is provided with a mounting groove, and the friction element 60 is disposed in the mounting groove.

[0069] It should be noted that the stretching of the conductive wire 313 can drive the winding reel 20 to rotate. The winding reel 20 then drives the coil spring 312 to rotate, causing the coil spring 312 to undergo elastic deformation. The elastic force of the coil spring 312 can drive the winding reel 20 and the conductive wire 313 to rotate in opposite directions, thus causing the conductive wire 313 to retract and be stored inside the winding reel 20. When the conductive wire 313 drives the winding reel 20 to rotate, the friction element 60 between the base 11 and the winding reel 20 provides frictional resistance to the rotation of the winding reel 20, thereby reducing the relative rotational speed between the winding reel 20 and the base 11. This slows down the speed at which the conductive wire 313 retracts into the winding reel 20 under the action of the coil spring 312, improving the storage safety of the conductive wire 313.

[0070] As shown in Figure 9, the housing 10 also includes a first cover 12, which together with the base 11 forms a receiving cavity (not shown in the figure), and the first cover 12 has an outlet (not shown in the figure) communicating with the receiving cavity. The winding spool 20 and the conductive wire 313 are located inside the receiving cavity, and the power connector 32 is located outside the receiving cavity. The first end of the conductive wire 313 passes through the outlet and connects to the power connector 32.

[0071] Specifically, the receiving cavity provides installation space for the winding reel 20. The winding space 22 of the winding reel 20 is connected to the receiving cavity. The outlet is used for the conductive wire 313 to extend out of the receiving cavity and connect to the power plug 32 for power supply to external devices. The conductive wire 313 can be pulled out of the winding space 22 of the winding reel 20 from the outlet position by external force. After the external force is removed, the conductive wire 313 can retract and return to the winding space 22 under the elastic force of the coil spring 312. The first cover 12 is detachably connected to the base 11 to facilitate adjustment or maintenance of the winding reel 20 and the conductive wire 313 in the receiving cavity. The coil spring 312 can be located inside or outside the receiving cavity; this embodiment does not limit this.

[0072] It should be noted that the winding reel 20 may include a winding post 21, a conductive wire body 313 and a coil spring 312, all of which are wound around the periphery of the winding post 21. A positioning post is provided on the first cover 12, and the winding post 21 is sleeved on the positioning post and rotatably connected to the positioning post. The positioning post provides a base for the rotation of the winding reel 20, and the central axis of the winding post 21 and the positioning post coincides with the first axis L1 of the base 11.

[0073] Further, as shown in FIG9, in some embodiments of this application, the charging assembly 30 further includes an output structure 50. The output structure 50 is located on the side of the winding reel 20 away from the base 11. The output structure 50 includes a first conductive element 51 and a second conductive element 52. The first conductive element 51 is located in the receiving cavity and is disposed on the surface of the winding reel 20 facing the first cover 12 and is electrically connected to the conductive wire 313. The second conductive element 52 is disposed on the surface of the first cover 12 facing the winding reel 20, and the second conductive element 52 is disposed opposite to and electrically connected to the first conductive element 51.

[0074] Specifically, the first conductive element 51 can be a conductive disk, and the second conductive element 52 can be a conductive contact. Multiple conductive contacts are arranged along the diameter of the conductive disk. When the winding disc 20 drives the first conductive element 51 to rotate, the second conductive element 52 can remain in contact with and conduct electricity to the first conductive element 51, providing a stable power supply to external electronic devices. The second conductive element 52 may also include an output line electrically connected to the conductive contact. The output line extends out of the first cover 12 for electrical connection to external electronic devices.

[0075] For example, the winding reel 20 is provided with a positioning pin and a buckle, and the first conductive element 51 has a positioning hole. The positioning pin on the winding reel 20 passes through the positioning hole, and the buckle engages with the edge of the first conductive element 51 to fix the first conductive element 51 to the winding reel 20. The second conductive element 52 can also be fixed to the first cover 12 by snap-fit, screw-fit, or adhesive, etc., which is not specifically limited here.

[0076] It should be noted that the output structure 50 can be used to connect to an external power source or electronic device. For example, the output structure 50 also includes a first plug. When the charging device 1 charges electronic devices such as mobile phones or computers, the power plug 32 is connected to the mobile phone or computer, and the first plug is connected to a socket or other power source to charge the mobile phone or computer. Alternatively, if the charging device 1 is installed on an electrical appliance such as a television, refrigerator, or washing machine, the output structure 50 also includes an electrical connection line. The electrical connection line is directly electrically connected to the electrical appliance, and the power plug 32 is connected to a socket or other power source to supply power to the electrical appliance.

[0077] Please refer to Figures 8-9. In some embodiments of this application, the winding reel 20 includes a winding post 21, a conductive wire 313, and a coil spring 312, all of which are wound around the periphery of the winding post 21. The base 11 has a placement groove 114 on the side opposite to the winding reel 20, and a through hole 115 is provided on the base 11, which communicates with the placement groove 114. The coil spring 312 is located in the placement groove 114, and the first end of the coil spring 312 is connected to the side wall of the placement groove 114. The winding post 21 passes through the through hole 115 and is connected to the second end of the coil spring 312.

[0078] Specifically, the winding reel 20 and the coil spring 312 are located on opposite sides of the base 11. The winding post 21 passes through the base 11 via the through hole 115. The conductive wire 313 is connected to the upper part of the winding post 21 above the base 11, and the coil spring 312 is connected to the lower part of the winding post 21 below the base 11, thereby reducing interference between the winding reel 20 and the coil spring 312 during rotation. The lower part of the winding post 21 has an opening, and the second end of the coil spring 312 is inserted into the opening and fixed to the winding post 21.

[0079] Furthermore, as shown in Figure 9, the housing 10 also includes a second cover 13, which is connected to the base 11 and closes the placement groove 114 to provide protection for the installation of the coil spring 312.

[0080] In some embodiments of this application, the friction member 60 is slidably connected to the first mating member, and the friction member 60 abuts against the second mating member. The first mating member is one of the base 11 and the winding reel 20, and the second mating member is the other of the base 11 and the winding reel 20. Specific embodiments are described in detail below.

[0081] When the conductive wire 313 is stretched and drives the winding disc 20 to rotate in the first rotation direction, there is a first frictional resistance between the friction member 60 and the second mating member. When the conductive wire 313 retracts and drives the winding disc 20 to rotate in the second rotation direction, there is a second frictional resistance between the friction member 60 and the second mating member. The first rotation direction is opposite to the second rotation direction, and the first frictional resistance is less than the second frictional resistance.

[0082] Specifically, the first rotation direction is either clockwise or counterclockwise, and the second rotation direction is either clockwise or counterclockwise. Taking the first rotation direction as clockwise and the second rotation direction as counterclockwise as an example, when the first end of the conductive wire 313 is stretched by an external force, the conductive wire 313 can drive the winding disc 20 to rotate clockwise together. At this time, the winding disc 20 can also drive the second end of the coil spring 312 to rotate clockwise, thereby causing the coil spring 312 to undergo elastic deformation. When the first end of the conductive wire 313 loses the external force, the winding disc 20 can be reset under the elastic force of the coil spring 312, that is, the winding disc 20 rotates counterclockwise. At this time, the winding disc 20 can also drive the second end of the conductive wire 313 to rotate counterclockwise, thereby retracting the conductive wire 313 into the winding disc 20.

[0083] When the winding reel 20 rotates, there is frictional resistance between the winding reel 20 and the friction element 60. The second frictional resistance when the conductive wire 313 retracts is greater than the first frictional resistance when the conductive wire 313 is stretched, thus resulting in a lower speed of the conductive wire 313 during retraction. Specifically, when the conductive wire 313 is stretched, the first frictional resistance between the winding reel 20 and the friction element 60 is small, thereby reducing the influence of the friction element 60 on the rotational speed of the winding reel 20 and the conductive wire 313; when the conductive wire 313 retracts, the second frictional resistance between the winding reel 20 and the friction element 60 is large, thereby reducing the rotational speed of the winding reel 20 and slowing down the retraction speed of the conductive wire 313.

[0084] Please refer to Figure 10. In some embodiments of this application, the first mating component is a base 11, the second mating component is a winding reel 20, and the friction component 60 is slidably connected to the base 11, and the friction component 60 abuts against the winding reel 20. A first groove 111 is provided on the side of the base 11 facing the winding reel 20. The friction component 60 is located within the first groove 111 and can slide relative to the first groove 111. The friction component 60 abuts against the winding reel 20. When the winding reel 20 rotates, the friction component 60 slides within the first groove 111 due to the frictional resistance between the winding reel 20 and the friction component 60. The first groove 111 provides installation space for the friction component 60, and the first groove 111 can limit the sliding distance and direction of the friction component 60, reducing displacement or misalignment of the friction component 60 during sliding.

[0085] Further, please refer to Figures 12-14. In some embodiments of this application, the first groove 111 extends along the first rotation direction of the winding disc 20, thereby making the sliding trajectory of the friction member 60 consistent with the rotation direction of the winding disc 20. When the winding disc 20 rotates, the friction member 60 can better slide along with the rotation direction of the winding disc 20 through frictional resistance, which is beneficial for providing frictional resistance for the rotation of the winding disc 20.

[0086] As shown in Figures 12-13, the bottom wall of the first groove 111 is inclined, and the bottom wall of the first groove 111 has a first end 112 and a second end 113 arranged opposite to each other. Along the direction of the first axis L1, the distance from the first end 112 to the winding reel 20 is less than the distance from the second end 113 to the winding reel 20. That is to say, when the friction member 60 is located at the first end 112 of the first groove 111, the friction member 60 is closer to the winding reel 20, so the contact surface between the friction member 60 and the winding reel 20 is... The friction area is relatively large, and the pressure between the friction element 60 and the winding reel 20 is also relatively large. Therefore, the frictional resistance generated between the friction element 60 and the winding reel 20 is also relatively large. However, when the friction element 60 is located at the second end 113 of the first groove 111, the friction element 60 is relatively far from the winding reel 20, so the contact area between the friction element 60 and the winding reel 20 is relatively small, and the pressure between the friction element 60 and the winding reel 20 is relatively small. Therefore, the frictional resistance generated between the friction element 60 and the winding reel 20 is also relatively small. This embodiment limits the height of the friction element 60 within the first groove 111, thereby creating different contact pressures between the friction element 60 and the winding reel 20. This allows the friction element 60 to provide different frictional resistances for different rotation directions of the winding reel 20. This not only makes the stretching of the conductive wire 313 easier and less strenuous, but also makes the retraction of the conductive wire 313 safer.

[0087] As shown in Figure 14, the base 11 may be provided with a plurality of first sliding grooves 111. The plurality of first sliding grooves 111 are arranged at intervals around the periphery of the first axis L1, and each first sliding groove 111 is provided with a friction element 60, thereby increasing the frictional resistance generated between the friction element 60 and the winding disc 20 when the conductive wire 313 retracts, which is beneficial to reducing the speed of the conductive wire 313 retracting.

[0088] It should be noted that, as shown in Figure 10, the side of the winding reel 20 facing the base 11 is the first side surface 25. The first side surface 25 is spaced apart from the base 11, which facilitates the rotation of the winding reel 20. The first side surface 25 is provided with an abutment portion 26, which is circular or annular. The abutment portion 26 protrudes from the first side surface 25 and abuts against the friction member 60 on the base 11, so as to generate frictional resistance when the winding reel 20 rotates.

[0089] Alternatively, referring to Figure 11, in some embodiments of this application, the first mating component is a winding reel 20, the second mating component is a base 11, and the friction member 60 is slidably connected to the winding reel 20, and the friction member 60 abuts against the base 11. A second groove 116 is formed on the side of the winding reel 20 facing the base 11. The friction member 60 is located within the second groove 116 and can slide relative to the second groove 116. The friction member 60 abuts against the base 11. When the winding reel 20 rotates, the friction member 60 slides in the second groove 116 due to the frictional resistance between it and the base 11.

[0090] The second groove 116 provides installation space for the friction element 60, and the friction element 60 slides within the second groove 116. The second groove 116 can limit the sliding distance and direction of the friction element 60, reducing the possibility of displacement or misalignment of the friction element 60 during sliding. Simultaneously, the friction element 60 is disposed on the winding reel 20. When the winding reel 20 rotates along the second rotation direction, it experiences a second frictional resistance. The method for achieving a larger second frictional resistance is similar to that in the above embodiment, which is to limit the height of the friction element 60 within the second groove 116, thereby creating different contact pressures between the friction element 60 and the base 11. This facilitates the friction element 60 providing different frictional resistances for different rotation directions of the winding reel 20.

[0091] Further, referring to Figure 14, in some embodiments of this application, the friction member 60 has a plurality of protrusions 61 on its surface facing the second mating member. These protrusions 61 are arranged along the first rotation direction of the winding disc 20, and abut against the second mating member. The protrusions 61 are spaced apart and are arc-shaped, forming a wavy friction surface. This increases the frictional resistance between the friction member 60 and the second mating member, facilitating the sliding of the friction member 60 on the first mating member when the winding disc 20 rotates. Specifically, taking the winding disc 20 as the second mating member and the base 11 as the first mating member, the protrusions 61 are located on the surface of the friction member 60 facing the winding disc 20, and abut against the contact portion 26 of the winding disc 20.

[0092] Please refer to Figures 15-16. In some embodiments of this application, the charging device 1 further includes a second locking assembly (not shown separately in the figures). The second locking assembly includes a third locking member 71 and a fourth locking member 72. The third locking member 71 is disposed on the base 11, and the fourth locking member 72 is disposed on the first side 25 of the winding reel 20.

[0093] The first locking member 41 is rotatably connected to the base 11, and the third locking member 71 is slidably connected to the winding reel 20. When the first locking member 41 slides relative to the winding reel 20, the first locking member 41 can also swing relative to the base 11. In this embodiment, the specific swing angle of the first locking member 41 relative to the base 11 is not limited.

[0094] Specifically, when the winding reel 20 rotates, it drives the second locking member 42 to rotate, and the winding reel 20 slides relative to the third locking member 71. The rotation trajectory of the fourth locking member 72 has locking and unlocking positions arranged sequentially. When the fourth locking member 72 rotates to the locking position, the first locking member 41 can rotate relative to the base 11, that is, the first locking member 41 swings relative to the base 11. At this time, the third locking member 71 and the fourth locking member 72 are locked together. The winding reel 20 is locked to the base 11, at which point the conductive wire 313 is locked and cannot be pulled out of the winding reel 20. When the fourth locking member 72 rotates to the unlocked position, the first locking member 41 can rotate again between itself and the base 11, that is, the first locking member 41 swings relative to the base 11 again. At this time, the third locking member 71 and the fourth locking member 72 are unlocked, so that the winding reel 20 is unlocked from the base 11 and rotates. At this time, the conductive wire 313 can be pulled out from the winding reel.

[0095] For example, the third locking member 71 includes a locking part 711, and the fourth locking member 72 has a locking groove 721. When the fourth locking member 72 is in the locked position, the locking part 711 engages with the locking groove 721. At this time, the conductive wire 313 and the coil spring 312 cannot be pulled out from the winding reel 20, thereby locking the winding reel 20 with the base 11. When the fourth locking member 72 slides from the locked position to the unlocked position, the locking part 711 separates from the locking groove 721. At this time, the conductive wire 313 retracts into the winding reel 20 under the elastic force of the coil spring 312, thereby unlocking the winding reel 20 from the base 11 and allowing it to rotate. The locking and unlocking of the locking part 711 and the locking groove 721 are convenient and quick, making the use of the second locking assembly more convenient.

[0096] In summary, since a friction element 60 is provided between the base 11 and the winding reel 20, the friction element 60 provides frictional resistance to the rotation of the winding reel 20. Simultaneously, by limiting the height of the friction element 60 within the groove, the contact pressure between the friction element 60 and the second mating part varies, which helps the friction element 60 provide different frictional resistance for different rotational directions of the winding reel 20. When the conductive wire 313 is stretched, it drives the winding reel 20 to rotate. At this time, the first frictional resistance between the friction element 60 and the second mating part is small, thereby reducing the impact of the friction element 60 on the rotational speed of the winding reel 20 and the conductive wire 313. When the conductive wire 313 retracts, the elastic force of the coil spring 312 can drive the winding reel 20 to rotate in the opposite direction. At this time, the second frictional resistance between the friction element 60 and the second mating part is large, thereby reducing the speed of the reverse rotation of the winding reel 20 and slowing down the retraction speed of the conductive wire 313, improving the storage safety of the conductive wire 313.

[0097] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 this application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0098] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A charging device, wherein, include: The housing has a receiving cavity and a cable outlet communicating with the receiving cavity; A winding reel is located in the receiving cavity, and the winding reel includes a winding post, which is rotatably connected to the housing; The charging assembly includes a charging cable located within the receiving cavity and a power connector located outside the housing. A first end of the charging cable passes through the outlet and connects to the power connector, and a second end of the charging cable is connected to the winding post. The charging cable includes an insulating layer, a coil spring, and a conductive wire. The conductive wire and the coil spring are both located within the insulating layer, and both the conductive wire and the coil spring are wound around the periphery of the winding post.

2. The charging device according to claim 1, wherein, The winding spool further includes a conductive post located inside and connected to the winding post. A first end of the conductive wire is electrically connected to the power connector, and a second end of the conductive wire is electrically connected to the conductive post. The charging assembly further includes: An output section, at least a portion of which is located in the receiving cavity and connected to the housing, the output section including a conductive sheet that is in conductive contact with the conductive post.

3. The charging device according to claim 2, wherein, The conductive post includes a post body and conductive traces. The axis of the post body coincides with the axis of the winding post, and the conductive traces are arranged around the outside of the post body. The conductive sheet is provided with multiple conductive contacts, which are arranged in a direction parallel to the axis of the column, and the conductive contacts are in conductive contact with the conductive traces.

4. The charging device according to claim 1, wherein, The insulating layer and the conductive wire are both bonded to the coil spring, and the coil spring has multiple fixing holes that are spaced apart.

5. The charging device according to claim 1, wherein, The charging device further includes: The first locking assembly includes a first locking member and a second locking member, wherein the first locking member is disposed on the housing and the second locking member is disposed on the winding reel; The first locking member is rotatably connected to the housing and slidably connected to the winding reel. The first locking member can slide relative to the winding reel around the axis of the winding post. The rotation trajectory of the second locking member has sequentially arranged locking and unlocking positions. When the second locking member is in the locking position, the first locking member and the second locking member are locked together to lock the winding reel to the housing. When the second locking member is in the unlocking position, the first locking member and the second locking member are unlocked to unlock the winding reel from the housing and allow it to rotate.

6. The charging device according to claim 5, wherein, The first locking member includes a hook portion, and the second locking member has a hook groove. When the second locking member is in the locking position, the hook portion engages with the hook groove to achieve the locking of the winding reel and the housing. When the second locking member is in the unlocked position, the hook part separates from the hook groove, so that the winding reel can be unlocked from the housing and rotated.

7. The charging device according to claim 6, wherein, The winding reel has a guide groove on the side facing the first locking member. The guide groove is arranged around the axis of the winding post. The second locking member is disposed in the guide groove, and the hook groove is connected to the guide groove. When the second locking member moves from the locking position to the unlocking position, the hook part moves from the hook groove to the guide groove, and the hook part can slide along the guide groove.

8. The charging device according to claim 7, wherein, The first locking component further includes: A separator is disposed within the guide slide groove and divides the guide slide groove into a coaxial first slide groove and a second slide groove. The separator has a first notch, and a second locking member is located at the first notch. The end of the second locking member and the end of the separator together form a first channel and a second channel. Both the first channel and the second channel are connected to the first slide groove and the second slide groove. The hook groove is located within the first channel or the second channel. A first protrusion is provided on the side wall of the first slide groove, the first protrusion protrudes towards the position of the first channel, and the first protrusion is used to change the movement trajectory of the hook part in the first slide groove. A second protrusion is provided on the side wall of the second slide groove, the second protrusion protrudes towards the position of the second channel, and the second protrusion is used to change the movement trajectory of the hook part in the second slide groove.

9. The charging device according to claim 1, wherein, The housing includes a base and a cover, the base and the cover forming the receiving cavity, and the cover and the base are detachably connected.

10. The charging device according to claim 9, wherein, The base is provided with a positioning post, and the winding post is sleeved on the positioning post and rotatably connected to the positioning post.

11. The charging device according to claim 1, wherein, The housing includes a base; The winding reel is disposed on the base, the winding reel is rotatably connected to the base, and the winding reel rotates relative to the first axis of the base; The first end of the conductive wire is electrically connected to the power connector, the first end of the coil spring is connected to the base, and the second end of both the conductive wire and the coil spring are connected to the winding reel. Both the conductive wire and the coil spring are wound around the periphery of the winding reel. A friction element is provided between the base and the winding reel, and the friction element abuts against the winding reel and the base.

12. The charging device according to claim 11, wherein, The friction element is slidably connected to the first mating element, and the friction element abuts against the second mating element. The first mating element is one of the base and the winding spool, and the second mating element is the other of the base and the winding spool. When the conductive wire is stretched and drives the winding disc to rotate in the first rotation direction, there is a first frictional resistance between the friction member and the second mating member. When the conductive wire is retracted and drives the winding disc to rotate in the second rotation direction, there is a second frictional resistance between the friction member and the second mating member. The first rotation direction is opposite to the second rotation direction, and the first frictional resistance is less than the second frictional resistance.

13. The charging device according to claim 12, wherein, The first mating component is the base, and the second mating component is the winding reel. The base has a first sliding groove on the side facing the winding reel. The friction element is located in the first sliding groove and abuts against the winding reel. The winding reel rotates to drive the friction element to slide in the first sliding groove.

14. The charging device according to claim 13, wherein, The first groove extends along the first rotation direction of the winding reel. The bottom wall of the first groove is inclined and has a first end and a second end that are disposed opposite to each other. Along the direction of the first axis, the distance from the first end to the winding reel is less than the distance from the second end to the winding reel.

15. The charging device according to claim 12, wherein, The first mating component is the winding reel, and the second mating component is the base. The winding reel has a second sliding groove on one side facing the base. The friction member is located in the second sliding groove and abuts against the base. The winding reel rotates to drive the friction member to slide in the second sliding groove.

16. The charging device according to claim 12, wherein, The friction element has a plurality of protrusions on its surface facing the second mating element. The plurality of protrusions are arranged along the first rotation direction of the winding disc, and the protrusions abut against the second mating element.

17. The charging device according to claim 11, wherein, The housing also includes: The first cover, together with the base, forms the receiving cavity, and the outlet is located on the first cover.

18. The charging device according to claim 17, wherein, The charging assembly further includes an output structure located on the side of the winding coil away from the base, the output structure comprising: A first conductive element is located inside the receiving cavity. The first conductive element is disposed on the surface of the winding reel facing the first cover and is electrically connected to the conductive wire. The second conductive element is connected to the surface of the first cover facing the winding reel, and the second conductive element is in conductive contact with the first conductive element.

19. The charging device according to claim 11, wherein, The winding spool includes a winding post. The base has a placement groove on the side opposite to the winding spool, and a through hole is formed on the base, which communicates with the placement groove. The coil spring is located in the placement groove, and the first end of the coil spring is connected to the side wall of the placement groove. The winding post passes through the through hole and is connected to the second end of the coil spring.

20. The charging device according to claim 11, wherein, The charging device further includes: The second locking assembly includes a third locking member and a fourth locking member, wherein the third locking member is disposed on the base and the fourth locking member is disposed on the winding reel; The third locking member is rotatably connected to the base and slidably connected to the winding reel. The rotation trajectory of the fourth locking member has sequentially arranged locking and unlocking positions. When the fourth locking member is in the locking position, the third locking member locks with the fourth locking member to lock the winding reel to the base. When the fourth locking member is in the unlocking position, the third locking member unlocks with the fourth locking member to unlock the winding reel from the base.

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