CN223032746U

CN223032746U - Cable coiling mechanism, wireless charger and power supply unit

Info

Publication number: CN223032746U
Application number: CN202421807083.0U
Authority: CN
Inventors: 洪吉林; 黄奕豪
Original assignee: Shenzhen Hi Rice Technology Co ltd; Shenzhen Sjet Technology Co ltd
Current assignee: Shenzhen Hi Rice Technology Co ltd; Shenzhen Sjet Technology Co ltd
Priority date: 2024-07-29
Filing date: 2024-07-29
Publication date: 2025-06-27
Anticipated expiration: 2034-07-29

Abstract

The utility model relates to a cable winding device, a wireless charger and power equipment, wherein the cable winding device comprises a base, a wire spool rotatably arranged on the base and an elastic piece for driving the wire spool to reset, and the base is movably provided with a movable piece matched with the wire spool; when the cable is wound, the winding disc is pulled to rotate so as to drive the movable part to move and unlock the winding disc, and after unlocking, the elastic part releases potential energy to drive the winding disc to reversely reset so as to wind the cable. According to the utility model, through the cooperation of the wire spool, the elastic piece and the movable piece, the automatic locking and the automatic winding of the cable after the quick release can be realized, the convenience of cable management is improved, in addition, the confusion and the damage of the cable in the storage process can be effectively prevented, and the service life of the cable is ensured.

Description

Cable coiling mechanism, wireless charger and power supply unit

Technical Field

The utility model relates to the field of power supply equipment accessories, in particular to a cable winding device, a wireless charger and power supply equipment.

Background

In the existing power supply device design, the storage and management of the power supply line is always a problem to be solved. Many power devices, such as chargers, mobile power sources, routers, etc., are equipped with long power lines or power lines to facilitate flexible placement in various use scenarios. However, these power lines often scatter at will when not using, not only influence the clean and tidy pleasing to the eye of equipment, still easily cause the damage because of trampling, pulling etc. reduces the life of equipment.

The conventional solutions are to attach tools such as storage bags or winding belts to the outside of the power supply device to arrange the power supply lines, but these methods are cumbersome to operate, have poor user experience, and are easy to lose. In addition, although a simple winding mechanism is arranged in some high-end power supply equipment, the basic winding function can only be realized, the automatic locking after the power line is pulled out and the pulling-out length of the power line can not be controlled accurately, and the problem of single function exists.

In view of the foregoing, it is necessary to provide a solution to the above-mentioned problems.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art and provides a cable winding device, a wireless charger and power equipment.

The technical scheme adopted for solving the technical problems is as follows:

The cable winding device comprises a base, a wire spool rotatably arranged on the base and an elastic piece for driving the wire spool to reset, wherein the base is movably provided with a movable piece matched with the wire spool, when a cable is released, the wire spool rotates under the action of a tensile force, the elastic piece deforms, the movable piece moves on the base and is matched with the wire spool to lock the wire spool so as to keep a pulled-out state of the cable, when the cable is wound, the wire spool is pulled to rotate so as to drive the movable piece to move and unlock the wire spool, and after the locking is released, the elastic piece releases potential energy to drive the wire spool to reversely reset so as to wind the cable.

As an improvement of the cable winding device, a special-shaped groove is formed in the bottom of the wire spool, at least one guide part is arranged in the special-shaped groove, the guide part divides the special-shaped groove into an inner rail and an outer rail which are communicated with each other at least, a limiting block is arranged at the communicating position, one end of the guide part is matched with the outer rail to guide the movable part to move towards the limiting block and limit and guide the movable part to move towards the inner rail, and the other end of the guide part is matched with the limiting block to guide the movable part to move towards the outer rail.

As an improvement of the cable winding device, the limiting block is provided with a limiting groove for accommodating the movable piece and a first guiding surface for guiding the movable piece to move towards the outer track.

As an improvement of the cable winding device, one end of the guide portion facing the limit groove is provided with a first guide surface and a second guide surface for guiding the movable member from the outer rail toward the limit groove and from the limit groove toward the inner rail, respectively.

As an improvement of the cable winding device, an end of the guide part facing the outer rail is provided with a third guide surface, and the third guide surface is matched with the first guide surface.

As an improvement of the cable winding device, a second guiding surface is arranged on one side, close to the limiting block, of the outer rail, and the second guiding surface can guide the movable piece to move towards the first guiding surface and guide the movable piece to match with the first guiding surface towards the limiting groove.

As an improvement of the cable winding device, the base is provided with a strip-shaped groove, and the movable piece can move in the strip-shaped groove along a specified track in a straight line.

As an improvement of the cable winding device, the movable piece is a ball.

As an improvement of the cable winding device, two guide parts are arranged, two communicating parts are arranged between the inner rail and the outer rail, and the limiting blocks are arranged at the two communicating parts.

As an improvement of the cable winding device, the wire spool is detachably connected with the base.

The wireless charger comprises a power line for input and/or output, and the cable winding device is arranged on a wire spool of the cable winding device in a winding mode.

The power supply equipment is provided with a power line for input and/or output, and comprises the cable winding device, wherein the power line is wound on a wire spool of the cable winding device.

The cable management device has the beneficial effects that through the cooperation of the wire spool, the elastic piece and the movable piece, the cable can be automatically locked and automatically wound after being quickly released, the convenience of cable management is improved, in addition, the confusion and damage of the cable in the storage process can be effectively prevented, the service life of the cable is ensured, and meanwhile, the use experience of a user is also improved.

And moreover, the cooperation of wire reel, elastic component and moving part can carry out spacing locking to the different degree of outwards pulling out of cable for the user can release corresponding cable length, with the scene situation of being suitable for the difference, avoids the cable to pull out overlength or the problem that the too short influence use was experienced, has realized accurate control and the stability performance of cable coiling mechanism.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the present utility model will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without inventive effort:

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a bottom view of the spool of the present utility model;

FIG. 4 is a top view of the base of the present utility model;

FIG. 5 is a schematic view of the moving track of the movable member in the special-shaped groove;

FIG. 6 is a schematic perspective view showing a rolled state of the present utility model;

FIG. 7 is a schematic perspective view of the present utility model in a released state;

fig. 8 is a schematic perspective view of a wireless charger according to the present utility model;

fig. 9 is a schematic view of a partial perspective structure of a wireless charger according to the present utility model.

In the figure, 1, a base; 11, a strip-shaped groove, 2, a wire spool, 21, a special-shaped groove, 211, an inner rail, 212, an outer rail, 22, a second guide surface, 3, an elastic piece, 4, a movable piece, 5, a guide part, 51, a first guide surface, 52, a second guide surface, 53, a third guide surface, 6, a limiting block, 61, a limiting groove, 62, a first guide surface, 7, a wireless charger, 8 and a power wire.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

As shown in fig. 1, 2, 3, 6 and 7, the cable winding device comprises a base 1, a wire spool 2 rotatably arranged on the base 1 and an elastic piece 3 for driving the wire spool 2 to reset, wherein the base 1 is movably provided with a movable piece 4 matched with the wire spool 2, when a cable is released, the wire spool 2 rotates under the action of a pulling force, the elastic piece 3 deforms, the movable piece 4 moves on the base 1 and is matched with the wire spool 2 to lock the wire spool 2 so as to keep the pulled-out state of the cable, when the cable is wound, the wire spool 2 is pulled to rotate so as to drive the movable piece 4 to move and unlock the wire spool 2, and after unlocking, the elastic piece 3 releases potential energy to drive the wire spool 2 to reversely reset so as to wind the cable.

Specifically, the elastic member 3 is a spiral spring, and the movable member 4 is movably disposed on the upper end surface of the base 1 and can move linearly on the base 1. The cable winding device can be arranged in electric equipment or power supply equipment, and the cable to be wound is wound on the wire spool 2 and stretches out to the outer side of the equipment so as to be taken by a user.

When releasing the cable, wire reel 2 can rotate under the effect of tensile force, and elastic component 3 can take place to warp this moment, and moving part 4 can remove on base 1 and cooperate with wire reel 2 simultaneously to lock wire reel 2, elastic component 3 can't drive wire reel 2 rotatory reset, in order to keep the pull-out state of cable. When the cable is required to be wound, the user only needs to pull the cable outwards to enable the wire spool 2 to rotate, and the action can drive the movable piece 4 to move so as to be unlocked with the wire spool 2. Once the locking is released, the elastic piece 3 which is deformed before and stores potential energy releases the potential energy, so that the wire spool 2 is driven to reversely reset, and the automatic winding of the cable is realized.

According to the utility model, through the cooperation of the wire reel 2, the elastic piece 3 and the movable piece 4, the automatic locking and automatic winding of the cable after quick release can be realized, the convenience of cable management is improved, in addition, the confusion and damage of the cable in the storage process can be effectively prevented, the service life of the cable is ensured, and the use experience of a user is also improved.

The cooperation of wire reel 2, elastic component 3 and moving part 4 can carry out spacing locking to the outside different degree of pulling out of cable for the user can release corresponding cable length, with the scene situation of being suitable for the difference, avoids the cable to pull out overlength or the too short problem that influences the use experience, has realized accurate control and the stability performance of cable coiling mechanism.

In some embodiments of the present application, the bottom of the wire spool 2 is provided with a special-shaped groove 21, a guiding part 5 is arranged in the special-shaped groove 21, the guiding part 5 divides the special-shaped groove 21 into an inner rail 211 and an outer rail 212 which are communicated, a limiting block 6 is arranged at the communicating part, one end of the guiding part 5 is matched with the outer rail 212 to guide the movable part 4 to move towards the limiting block 6 for limiting, the movable part 4 is guided to move towards the inner rail 211, and the other end of the guiding part 5 is matched with the limiting block 6 to guide the movable part 4 to move towards the outer rail 212.

When the cable in the winding state is required to be pulled out for use, the movable piece 4 is located on the inner rail 211, the cable is pulled out first, the cable is wound on the wire spool 2, the wire spool 2 is driven to rotate anticlockwise in the process of pulling the cable, the elastic piece 3 is deformed, after the movable piece 4 is contacted with the limiting block 6, the movable piece 4 is pushed to move to the outer rail 212 through the guiding of the limiting block 6, the movable piece 4 is always located on the outer rail 212 in the process of anticlockwise rotation of the wire spool 2 (namely in the process of pulling out the cable), the cable is released until the cable is pulled out to a specified length, the elastic force reset by the elastic piece 3 drives the wire spool 2 to rotate clockwise for reset, in the process, the movable piece 4 is matched with the limiting block 6 in a abutting mode after being matched with the outer rail 212 through the guiding part 5, the elastic force reset by the elastic piece 3 cannot drive the wire spool 2 to rotate for reset, and then a user can use the pulled cable outwards to complete the release function of the cable.

When the cable in the released state is required to be wound, the cable is pulled out again to drive the wire spool 2 to rotate anticlockwise, the movable piece 4 is contacted with the guide part 5 and then guided to move to the inner rail 211 through the guide part 5, the cable is released, the wire spool 2 is driven to rotate clockwise to reset by the resilience force of reset of the elastic piece 3, and the cable is wound gradually until the elastic piece 3 is completely reset, so that the winding function of the cable is completed.

According to the utility model, the movable piece 4 is matched with the special-shaped groove 21, the guide part 5 and the limiting block 6, when a user pulls out a cable, the wire spool 2 rotates anticlockwise, the movable piece 4 moves on the outer rail 212, after the cable is loosened, the elastic piece 3 resets to drive the wire spool 2 to rotate clockwise, the movable piece 4 moves to the limiting block 6 to be locked under the guidance of the guide part 5, when the cable is wound, the cable is pulled out again to enable the movable piece 4 to move to the inner rail 211, and after the cable is loosened, the elastic piece 3 resets to drive the wire spool 2 to rotate clockwise, so that the cable is wound. Through automatic rolling and release cable, promote the convenience of user's operation and the whole experience that equipment used. The unique guiding mechanism design of the movable piece 4 and the special-shaped groove 21, the guiding part 5 and the limiting block 6, which are matched with each other, can limit and lock the outwards pulled cables to different degrees, so that a user can release the corresponding cable length, different scene conditions are applicable, the problem that the use experience is influenced by overlong or too short cable pulling is avoided, and the accurate control and stability performance of the cable winding device are realized.

In some embodiments of the present application, the stopper 6 has a stopper groove 61 for receiving the movable member 4 and a first guide surface 62 for guiding the movable member 4 to move toward the outer rail 212. Specifically, when the movable member 4 rotates counterclockwise on the spool 2, the movable member 4 is guided to move toward the stopper 6 by the engagement of the guide portion 5 with the outer rail 212, and the positioning of the stopper groove 61 provides a stable resting position for the movable member 4, so that the movable member 4 can be accurately accommodated and locked. It is ensured that the spool 2 is not automatically reset by the elastic member 3 until the user needs to operate again. The first guide surface 62 is provided for guiding when the moveable member 4 needs to be moved from the inner rail 211 to the outer rail 212. When the spool 2 rotates counterclockwise and drives the movable member 4 to move, the first guide surface 62 can guide the movable member 4 to slide smoothly toward the outer rail 212 without being caught in the profiled groove 21 or deviating from a predetermined path.

The design of the limit groove 61 ensures that the movable piece 4 can be firmly locked when reaching the limit block 6, thereby preventing the wire spool 2 from accidentally resetting under the action of the elastic piece 3 and improving the stability and reliability of the whole cable winding device. By the design of the first guiding surface 62, a user can feel a smooth operation experience during use. The movement of the moveable member 4 between the inner and outer tracks 212 is smooth and predictable, reducing the trouble caused by mishandling or equipment failure.

Further, the guide portion 5 has a first guide surface 51 and a second guide surface 52 at one end facing the stopper groove 61 for guiding the movable element 4 from the outer rail 212 toward the stopper groove 61 and from the stopper groove 61 toward the inner rail 211, respectively. Specifically, when the movable member 4 moves to the outer rail 212 and contacts the guide portion 5 along with the counterclockwise rotation of the spool 2, the cable is released, the elastic member 3 drives the spool 2 to rotate clockwise for resetting, the first guide surface 51 functions and cooperates with the outer rail 212 (i.e., the groove wall of the special-shaped groove 21) to guide the movable member 4 to slide smoothly along the predetermined track toward the limit groove 61, and in this process, the first guide surface 51 ensures that the movable member 4 can reach the limit block 6 accurately and be locked.

In some modes of operation, when it is desired to retract the cable, the movable member 4 needs to be returned from the limit slot 61 to the inner rail 211, and the cable is pulled outwardly first, at which time the second guide surface 52 functions to guide the movable member 4 to disengage from the position of engagement with the limit slot 61 and smoothly return to the inner rail 211 along the path opposite to the first guide surface 51. This design ensures a smooth transition of the moveable member 4 between the inner and outer tracks 212.

By the arrangement of the first guide surface 51 and the second guide surface 52, the movement of the movable member 4 between the inner rail 211 and the outer rail 212 becomes extremely smooth, the jamming and obstruction during operation are reduced, and the use experience of the user is improved. The presence of the first guide surface 51 and the second guide surface 52 enables the cable reeling device to more precisely control the position of the movable member 4, whether releasing or reeling the cable, and the movable member 4 can be moved to a designated position according to a predetermined path, thereby achieving precise control of the cable length.

In some embodiments of the application, the end of the guide 5 facing the outer rail 212 has a third guide surface 53, the third guide surface 53 cooperating with the first guide surface 62. Specifically, when the cable needs to be pulled out and released, the movable member 4 is located on the inner rail 211, and drives the spool 2 to rotate counterclockwise to a certain extent along with the pulling out of the cable, and after the movable member 4 contacts with the third guiding surface 53 of the guiding portion 5, the movable member 4 moves toward the first guiding surface 62 of the limiting block 6 through the guiding of the third guiding surface 53, and after the movable member 4 contacts with the first guiding surface 62, the movable member 4 is guided to move toward the outer rail 212 through the first guiding surface 62, and as the spool 2 continues to rotate counterclockwise, the movable member 4 is always located on the outer rail 212.

The cooperation of the third guide surface 53 and the first guide surface 62 ensures that the movable member 4 can smoothly transition when moving from the inner rail 211 to the outer rail 212, reduces vibration and impact of the movable member 4 in the moving process, and protects the integral structure of the cable winding device.

In some embodiments of the present application, the side of the outer rail 212 near the stopper 6 has a second guiding surface 22, and the second guiding surface 22 may guide the movable member 4 to move toward the first guiding surface 51 and cooperate with the first guiding surface 51 to guide toward the stopper groove 61. Specifically, when the spool 2 rotates counterclockwise, the movable member 4 moves on the outer rail 212, and as the movable member 4 gradually approaches the stopper 6, the second guiding surface 22 on the outer rail 212 starts to function, and the movable member 4 is guided to move toward the first guiding surface 51 on the stopper 6 by its specific inclination angle or curved surface design. When the movable member 4 contacts the first guiding surface 51, the cable is loosened, the elastic member 3 drives the wire spool 2 to rotate clockwise for resetting, and the movable member 4 is guided to move along the predetermined track towards the limit groove 61 by the mutual cooperation of the second guiding surface 22 and the first guiding surface 51, so that the movable member 4 can enter the limit groove 61 stably and accurately to complete limit locking, and the cable released to the specified length can be used by a user. The second guide surface 22 on the outer rail 212 is tightly matched with the first guide surface 51 on the limiting block 6, so that accurate guiding and positioning of the movable piece 4 in the moving process are realized, and the performance stability and the user experience of the cable winding device are improved.

In some embodiments of the present application, the base 1 is provided with a bar-shaped groove 11, and the movable member 4 can move linearly along a specified track in the bar-shaped groove 11. In particular, the slot 11 provides a clear and stable trajectory for the mobile 4. When the spool 2 rotates and moves the movable member 4, the bar-shaped groove 11 ensures that the movable member 4 can move along a predetermined straight line trajectory without deviating from a path or generating unnecessary shaking. The presence of the slot 11 in fact plays a guiding and limiting role, so that the mobile 4 can maintain a stable attitude and orientation during the movement.

The linear motion of the movable piece 4 in the strip-shaped groove 11 is combined with the track motion of the movable piece in the special-shaped groove 21, so that the cable winding and unwinding functions of the cable winding device are realized together. The design of the slot 11 makes the movable member 4 more stable during movement, and reduces the problems of malfunction or performance degradation of the device that may be caused by shaking or deviating from the path.

As shown in fig. 5, G1 is the moving track of the movable member 4 on the inner track 211 when the cable is wound, and G2 is the moving track of the movable member 4 on the outer track 212 when the cable is pulled out and released. L1 is a variable path of the movable member 4 from the inner rail 211 to the outer rail 212 when the cable is pulled out and released, L2 is a path of the movable member 4 moving toward the limit groove 61 when the cable is pulled out to a designated length and the cable is released and the elastic member 3 drives the spool 2 to rotate clockwise, and a movable path of the movable member 4 moving from the limit groove 61 to the inner rail 211 when the spool 2 rotates counterclockwise when the cable is wound up. The point a is the position of the movable member 4 when the movable member 4 is locked in the limit groove 61, and the point B is the position of the movable member 4 which can move toward the limit groove 61 by the cooperation of the second guide surface 22 and the first guide surface 51.

In some embodiments of the application, as shown in fig. 4, the movable member 4 is a ball. Specifically, the balls are rolled and moved in the bar-shaped grooves 11 on the base 1 and the shaped grooves 21 on the bottom of the spool 2 as the movable members 4. The rolling friction has less resistance than the sliding friction, so that the balls can move more smoothly along a predetermined trajectory. When the spool 2 rotates to drive the cable to be wound and unwound, the balls can rapidly respond and change positions, and the low friction characteristic and high sensitivity of the spool ensure that the balls can reach preset positions in time, so that accurate control of the cable is realized.

As the balls move in a rolling friction mode, friction resistance is obviously reduced compared with sliding friction, and energy consumption of the cable winding device in the running process is reduced. The high hardness, the wear resistance and the low friction of the ball are not easy to wear in the long-term operation process, so that the durability and the service life of the cable winding device are improved.

In some embodiments of the present application, the guide portion 5 has two communicating portions between the inner rail 211 and the outer rail 212, and the two communicating portions are provided with the stopper 6. Specifically, when the spool 2 rotates, the movable member 4 moves within the shaped groove 21. Thanks to the presence of two guides 5, the mobile 4 is able to switch between the inner rail 211 and the outer rail 212 more stably and to ensure that it is able to be guided exactly to the limit stop 6 limit lock when required. Furthermore, the arrangement of two communicating places allows the movable member 4 to enter the limiting block 6 at two different positions, thereby providing more flexibility and reliability. When the movable piece 4 is matched with the limiting blocks 6, the design of the two limiting blocks 6 can help to disperse stress, and pressure and abrasion possibly born by the single limiting block 6 are reduced, so that the service life of the whole cable winding device is prolonged.

The existence of the two guide parts 5 and the two limiting blocks 6 enables the whole cable winding device to be more stable when the cable winding and unwinding are controlled. Even if one of the guide parts 5 or the limiting blocks 6 fails, the other can still work continuously, and the basic function of the device is maintained.

More guiding and limiting points means that the moveable member 4 can be controlled more precisely during the movement. The cable winding and unwinding device is beneficial to realizing more accurate cable winding and unwinding length and meeting different requirements of users. Thereby increasing the amount of length the cable can be pulled out and locked. For example, in the case where the cable is wound around the spool 2 in five places, if the number of the guide portions 5 and the stopper 6 is one, only four kinds of pulled-out positions of the cable can be locked, and if the number of the guide portions 5 and the stopper 6 is two, eight kinds of pulled-out positions of the cable can be locked.

In other embodiments, in order to increase the number of lengths in which the cable can be pulled out and locked, the number of communication between the outer rail 212 and the inner rail 211, and the number of the guide portions 5 and the stopper 6 may be set to 3, 4, 5, or 6.

In some embodiments of the application, the wire spool 2 is also detachably connected to the base 1. Specifically, the detachable connection between the spool 2 and the base 1 allows the user to easily detach and install the spool 2 as needed without complex disassembly of the entire cable winding device, reducing maintenance costs and time. Meanwhile, the detachable design is convenient for cleaning and maintaining the wire spool 2, and the good working state of the wire spool is maintained.

In addition, according to different use scenes and requirements, a user can conveniently replace the wire reels 2 with different specifications or materials. For example, for applications where thicker or longer cables need to be wound, a larger diameter or larger capacity spool 2 may be selected. The flexibility of using is improved, and the cable winding device can adapt to a wider application range.

As shown in fig. 8 and 9, a wireless charger has a power cord 8 for input and/or output, including the cable winding device described above, and the power cord 8 is wound on a spool 2 of the cable winding device. Specifically, the power cord 8 of the wireless charger 7 is wound on the wire spool 2 of the cable winding device, when a user needs to use the wireless charger 7, the power cord 8 with the required length can be easily pulled out, and after the use is finished, the power cord 8 can be quickly stored by the cable winding device. The convenience of power cord 8 management is improved, and the user does not need to manually wind and arrange power cord 8, so that time and energy are saved. Secondly, because the power line 8 is orderly stored in the winding device, the potential safety hazard caused by disorder of the power line 8 is avoided, the risk that the power line 8 is damaged is reduced, and the service life of the equipment is prolonged.

A power supply device is provided with a power line for input and/or output, comprising the cable winding device, and the power line is wound on the cable winding device. Specifically, through the effective management of cable coiling mechanism, the power cord can be automatic to be retrieved when not being used on the wire reel 2, has avoided the random scattering and the phenomenon of knoing of power cord, has kept the clean and tidy and pleasing to the eye of power equipment.

The power supply device includes, but is not limited to, a charger, a mobile power supply, a sound, a router, a modem, a television, a display, an audio device, and a photographic device.

It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.

Claims

1. A cable winding device, characterized in that it comprises a base, a winding drum rotatably arranged on the base, and an elastic member driving the winding drum to reset, the base being movably provided with a movable member cooperating with the winding drum; when the cable is released, the winding drum rotates under the action of a pulling force, the elastic member is deformed, the movable member moves on the base and cooperates with the winding drum, and the winding drum can be locked to keep the cable in a pulled-out state; when winding the cable, the winding drum is pulled to rotate to drive the movable member to move and unlock the winding drum, and after unlocking, the elastic member releases potential energy to drive the winding drum to reverse and reset to wind up the cable.

2. A cable winding device according to claim 1, characterized in that a special-shaped groove is opened at the bottom of the winding drum, and at least one guide part is arranged in the special-shaped groove, and the guide part divides the special-shaped groove into at least one inner track and an outer track that are connected, and a limit block is arranged at the connecting point, one end of the guide part cooperates with the outer track to guide the movable part to move toward the limit block to limit the position, and guides the movable part to move toward the inner track; the other end of the guide part cooperates with the limit block to guide the movable part to move toward the outer track.

3. A cable winding device according to claim 2, characterized in that the limit block has a limit groove for accommodating the movable part and a first guide surface for guiding the movable part to move toward the outer track; the guide part has a first guide surface and a second guide surface at one end facing the limit groove, which are respectively used to guide the movable part from the outer track toward the limit groove and from the limit groove toward the inner track.

4. A cable winding device according to claim 3, characterized in that the end of the guide portion facing the outer rail has a third guide surface, and the third guide surface cooperates with the first guide surface.

5. A cable winding device according to claim 4, characterized in that the outer rail has a second guide surface on one side close to the limit block, and the second guide surface can guide the movable part to move toward the first guide surface, and cooperate with the first guide surface to guide it toward the limit groove.

6. A cable winding device according to claim 5, characterized in that the base is provided with a strip groove, and the movable part can perform linear motion along a specified trajectory in the strip groove.

7. A cable winding device according to any one of claims 1 to 6, characterized in that the movable part is a ball.

8. A cable winding device according to any one of claims 2-6, characterized in that there are two guide parts, there are also two connecting points between the inner rail and the outer rail, and the two connecting points are both provided with the limit blocks.

9. A wireless charger having a power cord for input and/or output, characterized in that it comprises the cable winding device according to any one of claims 1 to 8, wherein the power cord is wound on a winding reel of the cable winding device.

10. A power supply device having a power cord for input and/or output, characterized in that it comprises the cable winding device according to any one of claims 1 to 8, wherein the power cord is wound on a winding drum of the cable winding device.