String winding and unwinding devices, shoes, gloves, medical protective equipment and storage devices

Abstract

The present application provides a string winding and unwinding device, shoes, gloves, medical protective equipment, and storage device. The string winding and unwinding device includes a knob, a ratchet disc, a base, a wire wheel, and a chassis. When the first engagement portion of the ratchet disc engages with the second engagement portion of the wire wheel and the knob rotates in a first clockwise direction, the knob moves and rotates the ratchet disc, which in turn moves and rotates the wire wheel, placing the string winding and unwinding device in a winding state and winding the string around the winding portion for storage. When the knob rotates in a second clockwise direction opposite to the first clockwise direction, the drive portion of the knob drives the connecting portion of the ratchet disc, disengaging the first meshing portion from the second meshing portion of the wire wheel, placing the string winding and unwinding device in a release state, and the wire wheel rotates within the chassis to release the string.

Description

[Technical Field]

[0001] The present application relates to lace winding and unwinding devices, shoes, gloves, medical protective equipment and storage devices. [Background technology]

[0002] Drawstrings are often used on everyday items such as shoes, hats, sports shirts, and gloves to accommodate a variety of users. While the looseness of the product can be adjusted by tying a knot in the drawstring, in daily life, knotted drawstrings often come undone accidentally. For example, untied shoelaces can easily become dirty and pose a risk of tripping and falling. Young children, in particular, are unable to tie their own laces, and elderly people, who are often in poor health, find it extremely inconvenient to bend over to tie their laces, increasing the risk of falling. Summary of the Invention [Problem to be solved by the invention]

[0003] To solve the above technical problems, there is a need to provide a winding and unwinding device for laces, shoes, gloves, medical protective equipment and storage devices. [Means for solving the problem]

[0004] In a first aspect of the present application, there is provided a cord thread winding and unwinding device, the cord thread winding and unwinding device comprising: a knob including a cover plate, a first engaging portion formed on one side of the cover plate, a driving portion formed on one side of the cover plate, a side plate connected to one side of the cover plate, and a first position restricting portion connected to one end of the side plate farther from the cover plate; a ratchet disk including a base plate, a second engaging portion formed on one side of the base plate adjacent to the first engaging portion and adapted to engage with the first engaging portion, a first reverse stop portion formed on an outer edge of the base plate, a first meshing portion formed between the base plate and the first reverse stop portion, and a connecting portion connected to the first meshing portion; a base including a sidewall structure annularly provided on the outer periphery of the ratchet disc, a second reverse stop portion formed on the inner surface of the sidewall structure, and a second position restricting portion formed on the sidewall structure, the sidewall structure accommodating the ratchet disc, the sidewall structure further having a first threading hole penetrating therethrough, the second reverse stop portion engaging with the first reverse stop portion to allow the ratchet disc to rotate relative to the base in a predetermined clockwise direction, the second position restricting portion entering a storage space surrounded by the cover plate and the side plate and being positionally restricted within the storage space by the first position restricting portion, and the knob being capable of rotating the ratchet disc; a wire wheel located within the sidewall structure, the wire wheel including: two opposing base plate portions disposed on sides of the ratchet disc remote from the knob; a winding portion connected between the two base plate portions; an extension wall connected to the base plate near the ratchet disc; and a second meshing portion disposed inside the extension wall and cooperating with the first meshing portion, the winding portion including a second threading hole, allowing a string to pass through the first threading hole and the second threading hole and be placed on the wire wheel; a chassis located on a side of the base away from the knob and fixed to the base; When the first meshing portion meshes with the second meshing portion and the knob rotates in a first clockwise direction, the knob moves and rotates the ratchet disc, which in turn moves and rotates the wire wheel, thereby placing the cord winding and unwinding device in a winding state and winding the cord onto the winding portion for storage; When the knob rotates in a second clockwise direction opposite to the first clockwise direction, the driving part drives the connecting part to disengage the first meshing part from the second meshing part, putting the string winding and unwinding device into a released state, and further rotating the wire wheel to release the string.

[0005] Compared to the prior art, in the string winding and unwinding device of the present application, when the first meshing portion of the ratchet disc meshes with the second meshing portion of the wire wheel and the knob rotates in a first clockwise direction, the knob rotates the ratchet disc, which in turn rotates the wire wheel. This places the string winding and unwinding device in a winding state and allows the string to be wound around the winding portion of the wire wheel for storage. When the knob rotates in a second direction opposite to the first clockwise direction, the driver of the knob drives the connecting portion of the ratchet disc to disengage the first meshing portion of the ratchet disc from the second meshing portion of the wire wheel, placing the string winding and unwinding device in a released state. This allows the wire wheel to rotate within the base and unwind the string. The string winding and unwinding device can wind the string by rotating forward and unwind the string by rotating backward, which is easy to operate and provides a favorable user experience. Furthermore, the number of overall parts of the string winding and unwinding device is small, which not only reduces assembly costs and improves assembly efficiency, but also allows the overall structure to be compact, which is advantageous for making the string winding and unwinding device smaller and lighter. Furthermore, the small number of parts improves the stability of the overall structure, and increases the reliability and service life of the string winding and unwinding device.

[0006] In one embodiment, the knob further includes a top block provided on one side of the cover plate, the top block being in contact with the inside of the first check portion and the winding portion in the released state to prevent the first check portion from separating from the second check portion. As can be seen, the top block can prevent the first check portion from separating from the second check portion in the released state, making it easier to switch from the released state to the winding state and improving the reliability of the string winding and unwinding device.

[0007] In one embodiment, the top block includes an inner surface and an outer surface, and the distance between the inner surface and the outer surface gradually decreases along the first clockwise direction, which facilitates the top block to gradually increase the contact force and effectively prevents the first check portion from coming off the second check portion.

[0008] In one embodiment, the connecting part includes a cylindrical body, and the side of the driving part is used to abut against the outer circumferential surface of the cylindrical body to drive the connecting part. As can be understood, by making the connecting part a cylindrical body and abutting the side of the driving part against the outer circumferential surface of the cylindrical body, it is possible to ensure that the driving part smoothly drives the connecting part. Thus, the string winding and unwinding device can smoothly switch from the winding state to the releasing state.

[0009] In one embodiment, the connection portion further includes an extension block connected to the cylindrical body. The extension block is used to abut against the top block in the released state. The drive portion includes a main drive portion and a stopper portion connected to the main drive portion. A side surface of the main drive portion is used to abut against the outer peripheral surface of the top block to drive the connection portion. The stopper portion is connected to the main drive portion so as to be bent, and is used to stop the top block after driving the connection portion and prevent the first meshing portion from sliding outward from the drive portion, making it impossible to achieve the released state.

[0010] In one embodiment, the first engagement portion includes a forward rotation prevention engagement portion and a reverse rotation prevention engagement portion. When the string winding and unwinding device is in the winding state, the reverse rotation prevention engagement portion engages with the second engagement portion. When the string winding and unwinding device is in the released state, the forward rotation prevention engagement portion engages with the second engagement portion. The forward rotation prevention engagement portion and the reverse rotation prevention engagement portion effectively prevent reverse rotation due to erroneous operation, automatic reset, etc., thereby improving the reliability of the string winding and unwinding device.

[0011] In one embodiment, there are at least two second engagement portions, which are sequentially distributed along the circumferential direction. There are at least two forward rotation prevention engagement portions and at least two reverse rotation prevention engagement portions, which are sequentially distributed along the circumferential direction. There are at least two first meshing portions and at least two connecting portions, which are sequentially distributed along the circumferential direction. There are at least two first check portions and at least two second check portions, which are sequentially distributed along the circumferential direction. The number of driving portions and top blocks is the same as and corresponds to the number of connecting portions. The first check portion includes a resilient arm and a first check tooth portion connected to the resilient arm. The second check portion includes a plurality of second check teeth portion sequentially connected in the circumferential direction. The first meshing portion includes a connecting arm and a first meshing tooth portion connected to the connecting arm. The second meshing portion includes a plurality of second meshing tooth portions sequentially connected in the circumferential direction. As can be understood, by installing the above-mentioned numbers of second engagement portions, forward rotation prevention engagement portions, reverse rotation prevention engagement portions, first meshing portions, connecting portions, first check portions, second check portions, driving portions, top blocks, second check tooth portions and second meshing tooth portions, it is possible to achieve the technical effect of improving the stability and reliability of the string winding and unwinding device.

[0012] In one embodiment, the knob includes a raised structure provided in an intermediate region of the cover plate. The forward rotation prevention engagement portion and the reverse rotation prevention engagement portion are recesses sequentially formed on the outer surface of the raised structure. The base plate includes a recessed structure provided in the intermediate region. The second engagement portion includes a locking hook that fits into the recessed structure. The locking hook engages with the recess of the forward rotation prevention engagement portion or the recess of the reverse rotation prevention engagement portion. The locking hook and recessed structure are simple and reliable, and the cooperation of the locking hook and the recessed portion can reliably prevent reverse rotation due to incorrect operation or automatic return, thereby improving the reliability of the string winding and unwinding device.

[0013] In one embodiment, a first position restricting portion is further provided on the outer surface of the raised structure. A second position restricting portion is further provided on the side wall surface of the recessed structure. One of the first position restricting portion and the second position restricting portion is a position restricting block, and the other of the first position restricting portion and the second position restricting portion is a position restricting slit. The position restricting block slides within the position restricting slit to restrict the relative rotation angle between the knob and the ratchet disk, so that the forward rotation preventing engagement portion and the reverse rotation preventing engagement portion of the knob sequentially engage and disengage with the second engagement portion of the ratchet disk. As can be seen, the position restricting block and the position restricting slit have a simple and reliable structure, and therefore the position restricting block and the position restricting slit cooperate to restrict the relative rotation angle between the knob and the ratchet disk. As a result, the forward rotation prevention engagement portion and the reverse rotation prevention engagement portion of the knob sequentially engage or disengage with the second engagement portion of the ratchet disc, improving the stability and user experience of the string winding and unwinding device.

[0014] In one embodiment, the recess includes a first surface and a second surface connected to each other so as to be bent toward each other. The raised structure has an arc-shaped surface connecting the first surface and the second surface. The angle formed by a tangent to a connection point between the first surface and a portion of the arc-shaped surface connected thereto is different from the angle formed by a tangent to a connection point between the second surface and a portion of the arc-shaped surface connected thereto. This makes it possible for the external force required to disengage the locking hook from the recess of the forward rotation prevention engagement part to be smaller than the external force required to disengage the locking hook from the recess of the reverse rotation prevention engagement part. As can be seen, by providing the above structure, the external force required to disengage the locking hook from the recess of the forward rotation prevention engagement part can be smaller than the external force required to disengage the locking hook from the recess of the reverse rotation prevention engagement part, thereby improving the user experience.

[0015] In one embodiment, the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses provided sequentially on the cover plate along the circumferential direction. The second engaging portion is a block provided on the winding portion. The block engages with the recess of the forward rotation prevention engaging portion or the recess of the reverse rotation prevention engaging portion. The structure of the block and the recess is simple and highly reliable, and the cooperation of the block and the recess can stably prevent reverse rotation phenomena due to miscontact or automatic return, thereby improving the reliability of the string winding and unwinding device.

[0016] In one embodiment, a first position restricting portion is further provided on one side of the cover plate, and a second position restricting portion is further provided on the side of the winding portion closer to the cover plate. One of the first position restricting portion and the second position restricting portion is a position restricting block, and the other is a position restricting slit. The position restricting block slides within the position restricting slit to restrict the relative rotation angle between the knob and the ratchet disk, thereby allowing the forward rotation preventing engagement portion and the reverse rotation preventing engagement portion of the knob to sequentially engage and disengage with the second engagement portion of the ratchet disk. There are at least two first position restricting portions and two second position restricting portions, and they are distributed in the circumferential direction. As can be seen, the position restricting block and the position restricting slit have a simple and reliable structure, and their cooperation can restrict the relative rotation angle between the knob and the ratchet disk, allowing the forward rotation preventing engagement portion and the reverse rotation preventing engagement portion of the knob to sequentially engage and disengage with the second engagement portion of the ratchet disk. This can improve the stability and user experience of the string winding and unwinding device.

[0017] In one embodiment, the axial height of the block in a direction from the knob toward the ratchet disk is lower than the axial height of the position-restricting block, so that when the block switches engagement with a different recess, the knob and the ratchet disk remain connected and their relative positions are restricted, preventing excessive rotation.

[0018] In one embodiment, the recess includes a first surface and a second surface connected to each other so as to be bent toward each other. The angle between one main body surface of the cover plate and the first surface is different from the angle between one main body surface of the cover plate and the second surface. This makes the external force required to disengage the block from the recess of the forward rotation prevention engagement part smaller than the external force required to disengage the block from the recess of the reverse rotation prevention engagement part. As can be seen, by providing the above structure, the external force required to disengage the block from the recess of the forward rotation prevention engagement part is smaller than the external force required to disengage the block from the recess of the reverse rotation prevention engagement part, improving the user experience.

[0019] In one embodiment, the base plate portion farther from the ratchet disc further includes at least one slot communicating with the second wire inlet hole, the slot being used to receive and position the knot of the string. By providing the slot to receive the knot of the string, the position of the knot can be regulated, and the occurrence of the phenomenon of the knot getting caught or coming off the wire wheel can be effectively prevented.

[0020] In one aspect of the present application, there is further provided a shoe, the shoe including a shoe body, shoelaces, and a lace winding and unwinding device according to any of the above-described embodiments, the shoelaces functioning as the lace thread, and the lace winding and unwinding device being used to wind and unwind the shoelaces.

[0021] In one aspect of the present application, there is further provided a hat, which includes a hat body, a hat string, and a string winding and unwinding device according to any of the above-described embodiments. The hat string is used to tighten or loosen the hat body and also functions as the string. The string winding and unwinding device is used to wind and unwind the hat string.

[0022] In one aspect of the present application, there is further provided a glove. The glove includes a glove body, a glove string, and a string winding and unwinding device according to any of the above-described embodiments. The glove string is used to tighten or loosen the glove body and functions as the string. The string winding and unwinding device is used to wind and unwind the glove string.

[0023] In one aspect of the present application, there is further provided a medical protective device, which includes a medical protective device body, a medical protective device string, and a string winding and unwinding device according to any of the above-described embodiments. The medical protective device string is used to tighten or release the opening of the medical protective device body and functions as the string. The string winding and unwinding device is used to wind and unwind the medical protective device string.

[0024] In one aspect of the present application, there is further provided a storage device, which includes a storage body, a storage string, and a string winding and unwinding device according to any of the above-described embodiments. The storage string is used to tighten or release the storage body and also functions as the string. The string winding and unwinding device is used to wind and unwind the storage string.

[0025] In addition, the shoes, hats, gloves, medical protective equipment, and storage devices provided in the above-mentioned aspects are equipped with the string winding and unwinding device described in any of the above-mentioned embodiments, and therefore also have the technical effects of the string winding and unwinding device of the above-mentioned embodiments. Since the technical effects of the string winding and unwinding device have already been described in detail above, they will not be repeated here. [Brief explanation of the drawings]

[0026] In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following briefly introduces the drawings necessary for describing the embodiments or the prior art. Obviously, the drawings described below are only examples of the present application, and those skilled in the art can obtain other drawings from the provided drawings without any creative work.

[0027] [Figure 1] 1 is a perspective view of a string winding and unwinding device according to a first embodiment of the present invention; [Figure 2] 2 is an exploded view of the string winding and unwinding device shown in FIG. 1. [Figure 3] 2 is an exploded view of the string winding and unwinding device shown in FIG. 1, seen from another angle. [Figure 4] 2 is a cross-sectional view of the string winding and unwinding device shown in FIG. 1. FIG. [Figure 5] 3 is a perspective view of a knob of the string winding and unwinding device shown in FIG. 2. FIG. [Figure 6] 4 is a perspective view of a ratchet disk of the string winding and unwinding device shown in FIG. 3. FIG. [Figure 7] 2 is a cross-sectional view of the string winding and unwinding device shown in FIG. 1 in a winding state. FIG. [Figure 8] 2 is a cross-sectional view of the string winding and unwinding device shown in FIG. 1 in a released state. FIG. [Figure 9] FIG. 10 is a perspective view of a string winding and unwinding device according to a second embodiment of the present invention. [Figure 10] FIG. 10 is an exploded view of the string winding and unwinding device shown in FIG. 9. [Figure 11] 10 is an exploded view of the string winding and unwinding device shown in FIG. 9, seen from another angle. [Figure 12] FIG. 10 is a cross-sectional view of the string winding and unwinding device shown in FIG. 9. [Figure 13] 11 is a perspective view of a knob of the string winding and unwinding device shown in FIG. 10. FIG. [Figure 14]12 is a perspective view of a ratchet disk of the string winding and unwinding device shown in FIG. 11. FIG. [Figure 15] 10 is a cross-sectional view of the string winding and unwinding device shown in FIG. 9 in a winding state. [Figure 16] 10 is a cross-sectional view of the string winding and unwinding device shown in FIG. 9 in a released state. [Figure 17] FIG. 10 is an exploded view of a string thread winding and unwinding device according to a third embodiment of the present invention. [Figure 18] 18 is an exploded view of the string winding and unwinding device shown in FIG. 17, seen from another angle. [Figure 19] 18 is a cross-sectional view of the string winding and unwinding device shown in FIG. 17 in a winding state. FIG. [Figure 20] 18 is a cross-sectional view of the string winding and unwinding device shown in FIG. 17 in a released state. [Figure 21] FIG. 10 is an exploded view of a string thread winding and unwinding device according to a fourth embodiment of the present invention. [Figure 22] 22 is an exploded view of the string winding and unwinding device shown in FIG. 21, seen from another angle. [Figure 23] 23 is a cross-sectional view of the string winding and unwinding device shown in FIG. 22 in a winding state. FIG. [Figure 24] 24 is a cross-sectional view of the string winding and unwinding device shown in FIG. 23 in a released state. FIG. [Figure 25] 1 is a schematic diagram of a shoe structure according to one embodiment of the present application. [Figure 26] 1 is a structural schematic diagram of a hat according to one embodiment of the present application. [Figure 27] 1 is a structural schematic diagram of a glove according to one embodiment of the present application. [Figure 28] 1 is a structural schematic diagram of a medical protective device according to one embodiment of the present application. [Figure 29] 1 is a structural schematic diagram of a storage device according to one embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments that those skilled in the art can obtain without any creative work fall within the scope of protection of the present application.

[0029] In order to make the above objects, features and advantages of the present application clearer and easier to understand, the present application will be described in more detail below with reference to the drawings and specific embodiments.

[0030] In order to help those skilled in the art better understand the technical proposal of the present application, the technical proposal of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained based on the embodiments of the present application without the need for creative work by ordinary skilled in the art shall all fall within the scope of protection of the present application.

[0031] Terms such as "first," "second," and "third" in the specification and claims of this application and in the accompanying drawings are used to distinguish between different objects, not to describe a particular order. Furthermore, the term "comprises" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may alternatively include unlisted steps or units, or alternatively include other steps or units inherent to such process, method, product, or apparatus.

[0032] Please refer to Figures 1 to 16. The first and second embodiments of the present application both disclose a string winding and unwinding device 1. The string winding and unwinding device 1 includes a knob 10, a ratchet disc 20, a base 30, a wire wheel 40, and a chassis 50.

[0033] The knob 10 includes a cover plate 11, a first engagement portion 12 formed on the inside of the cover plate 11, a drive portion 15 formed on the inside of the cover plate 11, a side plate 13 connected to one side of the cover plate 11, and a first position regulating portion 14 connected to one end of the side plate 13 away from the cover plate 11.

[0034] The ratchet disk 20 includes a base plate 21, a second engagement portion 22 formed on the side of the base plate 21 adjacent to the first engagement portion 12 and for engaging with the first engagement portion 12, a first reverse stop portion 23 formed on the outer edge of the base plate 21, a first meshing portion 24 formed between the base plate 21 and the first reverse stop portion 23, and a connection portion 25 connected to the first meshing portion 24.

[0035] The base 30 includes a sidewall structure 31 annularly disposed around the outer periphery of the ratchet disc 20, a second stopper 32 formed on the inner surface of the sidewall structure 31, and a second position restricting portion 33 formed on the sidewall structure 31. The sidewall structure 31 accommodates the ratchet disc 20. The sidewall structure 31 also has a first wire entry hole 34 extending therethrough. The second stopper 32 engages with the first stopper 23 to allow the ratchet disc 20 to rotate relative to the base 30 in a predetermined clockwise direction. The second position restricting portion 33 enters a storage space (not shown) surrounded by the cover plate 11 and the side plate 13, and is restricted in position within the storage space by the first position restricting portion 14. The knob 10 can rotate the ratchet disc 20.

[0036] The wire wheel 40 is located within the sidewall structure 31 and includes two opposing base plate portions 42 on the side of the ratchet disc 20 farther from the knob 10, a winding portion 43 connected between the two base plate portions 42, an extension wall 41 connected to the base plate 21 closer to the ratchet disc, and a second meshing portion 46 provided inside the extension wall 41 and adapted to cooperate with the first meshing portion 24. The winding portion 43 includes a second wire inlet hole 45. This allows a string to be threaded onto the wire wheel 40 through the first wire inlet hole 34 and the second wire inlet hole 45.

[0037] The chassis 50 is located on the side of the base plate portion 42 that is away from the wire wheel 40 and is fixed to the base 30 .

[0038] When the first meshing portion 24 meshes with the second meshing portion 46 and the knob 10 rotates in a first clockwise direction, the knob 10 rotates the ratchet disc 20, which in turn rotates the wire wheel 40. This puts the string winding and unwinding device 1 into a winding state, and the string can be wound around the winding portion 43 of the wire wheel 40 and stored.

[0039] When the knob 10 rotates in a second direction opposite to the first clockwise direction, the driving unit 15 drives the connecting unit 25 to disengage the first meshing unit 24 from the second meshing unit 46, thereby releasing the string winding and unwinding device 1. In this case, the wire wheel 40 rotates to release the string.

[0040] Compared with the prior art, in the string winding and unwinding device 1 of the present application, when the first meshing portion 24 of the ratchet disc 20 meshes with the second meshing portion 46 of the wire wheel 40 and the knob 10 rotates in a first clockwise direction, the knob 10 moves and rotates the ratchet disc 20, which in turn moves and rotates the wire wheel 40. As a result, the string winding and unwinding device 1 enters a winding state, and the string is wound around the winding portion 43 of the wire wheel 40 and wound by the winding portion 43. When the knob 10 rotates in a second clockwise direction opposite to the first clockwise direction, the driving portion 15 of the knob 10 drives the connecting portion 25 of the ratchet disc 20 to disengage the first meshing portion 24 of the ratchet disc 20 from the second meshing portion 46 of the wire wheel 40, thereby placing the string winding and unwinding device 1 in a released state. Furthermore, the wire wheel 40 can rotate to release the string. The string winding and unwinding device 1 can wind the string by rotating forward and unwind the string by rotating backward, which is easy to operate and provides a good user experience. Furthermore, the number of overall parts in the string winding and unwinding device 1 is small, which not only reduces assembly costs and improves assembly efficiency but also makes the overall structure compact, which is advantageous for reducing the size and weight of the string winding and unwinding device 1. Furthermore, the small number of parts improves the stability of the overall structure and the reliability and service life of the string winding and unwinding device 1. As can be understood, the forward rotation refers to rotation in the first clockwise direction. The reverse rotation refers to rotation in the second clockwise direction, which is opposite to the first clockwise direction. In some embodiments, the first clockwise direction is a clockwise direction and the second clockwise direction is a counterclockwise direction, but in some other embodiments, the first clockwise direction may be a counterclockwise direction and the second clockwise direction may be a clockwise direction.

[0041] Furthermore, the knob 10 further includes a top block 16 provided on one side of the cover plate 11. The top block 16 abuts between the inside of the first reverse stop portion 23 and the winding portion 43 in the released state, preventing the first reverse stop portion 23 from separating from the second reverse stop portion 32. As can be seen, the top block 16 prevents the first reverse stop portion 23 from separating from the second reverse stop portion 32 in the released state, facilitating switching from the released state to the winding state, and improving the reliability of the string winding and unwinding device 1.

[0042] In the first and second embodiments, the top block 16 includes an inner surface 161 and an outer surface 162. The distance between the inner surface 161 and the outer surface 162 gradually decreases along the first clockwise direction. This allows the top block 16 to gradually increase the contact force, thereby achieving effective contact and preventing separation between the first check portion 23 and the second check portion 32.

[0043] In the first and second embodiments, the connecting part 25 is a cylindrical body, and the side of the driving part 15 abuts against the outer circumferential surface of the cylindrical body and is used to drive the connecting part 25. As can be seen, by making the connecting part 25 a cylindrical body and abutting the side of the driving part 15 against the outer circumferential surface of the cylindrical body, it is possible to ensure that the driving part 15 smoothly drives the connecting part 25. This allows the string winding and unwinding device 1 to smoothly switch from the winding state to the releasing state.

[0044] In the first and second embodiments, the first engagement portion 12 includes a forward rotation prevention engagement portion 122 and a reverse rotation prevention engagement portion 121. When the string winding and unwinding device 1 is in the winding state, the reverse rotation prevention engagement portion 121 engages with the second engagement portion 22. When the string winding and unwinding device 1 is in the released state, the forward rotation prevention engagement portion 122 engages with the second engagement portion 22. The forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 effectively prevent rotation phenomena due to erroneous operation, automatic reset, etc., and improve the reliability of the string winding and unwinding device 1.

[0045] Furthermore, there are at least two second engagement portions 22, which are sequentially distributed along the circumferential direction. There are at least two forward rotation prevention engagement portions 122 and two reverse rotation prevention engagement portions 121, which are sequentially distributed along the circumferential direction. There are at least two first meshing portions 24 and two connecting portions 25, which are sequentially distributed along the circumferential direction. There are at least two first back stop portions 23 and two second back stop portions 32, which are sequentially distributed along the circumferential direction. The number of driving portions 15 and top blocks 16 is the same as and corresponds to the number of connecting portions 25. The first back stop portion 23 includes a resilient arm 231 and a first back stop tooth portion 232 connected to the resilient arm 231. The second back stop portion 32 includes a plurality of second back stop teeth connected sequentially along the circumferential direction. The first meshing portion 24 includes a connecting arm 241 and a first meshing tooth portion 242 connected to the connecting arm 241. The second meshing portion 46 includes a plurality of second meshing tooth portions connected sequentially along the circumferential direction. As can be seen, the provision of the above-mentioned numbers of second engaging portions 22, forward rotation preventing engaging portions 122, reverse rotation preventing engaging portions 121, first meshing portion 24, connecting portions 25, first reverse stop portions 23, second reverse stop portions 32, driving portion 15, top block 16, second reverse stop tooth portions, and second meshing tooth portions can achieve the technical effect of improving the stability and reliability of the string winding and unwinding device 1. Specifically, the number of the second engagement portion 22, the forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 may be two, the number of the first meshing portion 24, the connection portion, the first reverse stop portion 23, the drive portion 15 and the top block 16 may be three, and the number of the second reverse stop tooth portion and the second meshing tooth portion may be plural.

[0046] Specifically, as shown in Figures 8 and 16, in the released state, the top block 16 abuts against the first tooth 232 of the first reverse stop portion 23, and the first tooth 23 abuts against and meshes with the second tooth 32. When preventing the start of forward rotation, the knob 10 and the second tooth 32 simultaneously start to rotate. In this way, the driving portion 15 and the connecting portion 25 cannot or will not break away from contact. As a result, the first tooth 242 of the first meshing portion 24 temporarily meshes with the second meshing portion 46 of the wire wheel 40 again, preventing the string from being wound. That is, after the top block 16 forcibly brings the first backstop tooth 232 into contact with the second backstop portion 32, when a user rotates the knob 10, the top block 16 prevents the first backstop tooth 232 from rotating and sliding out of the second backstop portion 32, and the ratchet disc 20 also becomes unable to rotate. In this case, the knob 10 can first rotate forward by a certain angle (e.g., the second engagement portion 22 disengages from the forward rotation prevention engagement portion 122 and engages with the reverse rotation prevention engagement portion 121). At the same time, the driving portion 15 and the connecting portion 25 also rotate by a certain angle. At this time, when the driving portion 15 and the connecting portion 25 release their contact, the first engagement tooth 242 of the first engagement portion 24 again engages with the second engagement portion 46 of the wire wheel 40, thereby switching to the winding state and winding the string.

[0047] As can be seen, in the knob 10, the side plate 13 is an annular side plate connected to the outer edge of the cover plate 11. An anti-slip structure 131 is further formed on the outer surface of the side plate 13. The anti-slip structure 131 includes a plurality of anti-slip grooves extending along a direction perpendicular to the cover plate 11. The plurality of anti-slip grooves are arranged in an annular pattern on the outer surface of the side plate 13. Forming the anti-slip structure 131 on the outer surface of the side plate 13 provides an anti-slip effect when rotating the knob 10, making it easy to operate. The first position restricting portion 14 may include at least two first extensions 141 extending inward from the side plate 13. The second position restricting portion 33 includes a second extension 331 protruding outward from the side wall structure 31. The second extension 331 has an annular structure, and enters the storage space enclosed by the side plate 13 and the cover plate 11, and is engaged and fixed to the side of the first extension 141 closer to the cover plate 11. By providing the second extension 331 with an annular structure and a plurality of first extensions 141, when the second extension 331 enters the storage space enclosed by the side plate 13 and the cover plate 11 and engages and fixed to the side of the first extension 141 closer to the cover plate 11, it is not affected by the installation positions of the first extension 141 and the second extension 331, making operation easier.

[0048] Furthermore, as can be understood, in the ratchet disk 20, one end of the elastic arm 231 farther from the first back tooth 232 is connected to the outer edge of the base plate 21. The elastic arm 231 can deform to move the first back tooth 232 toward or away from the base plate 21. In the natural state of the elastic arm 231, the first back tooth 232 is spaced apart from the base plate 21. In the base 30, the plurality of second back teeth are connected sequentially along the first clockwise direction and are annularly arranged on the inner surface of the sidewall structure 31 to mesh with the first back tooth 232. The first back tooth 232 can rotate relative to the second back tooth along the first clockwise direction and mesh with a different second back tooth. This allows the ratchet disk 20 to be rotated by the knob 10, resulting in a simple operation and a stable structure. As can be understood, under the action of an external force, the first check tooth 232 rotates relative to the second check tooth only along the first clockwise direction (e.g., clockwise) and can mesh with a different second check tooth, but cannot rotate in the opposite direction. This achieves a check function. In this embodiment, the first clockwise direction is clockwise and the second clockwise direction is counterclockwise, but this is not limited thereto. In a modified example, the first clockwise direction may be counterclockwise and the second clockwise direction may be clockwise. In addition, the provision of the elastic arm 231 makes it easier to install the ratchet disc 20.

[0049] In the wire wheel 40, the two base plates 42 and the winding portion 43 connected between the two base plates 42 may surround a storage portion 49 for storing the string. The storage portion 49 allows the string to be stored neatly in the wire wheel 40, preventing the string from being tangled in another position and affecting other components. Furthermore, the base plate 42, which is spaced from the ratchet disc 20, further includes at least one slot 44 communicating with the second wire entrance hole 45. The slot 44 is used to positionally regulate and accommodate the knot of the string. By providing the slot 44 to accommodate the knot of the string, the position of the knot can be regulated, effectively preventing the knot from becoming stuck or coming off the wire wheel. As can be seen, the number of the second wire entrance hole 45 and the slot 44 may be two. This allows both ends of a single string to pass through, and the two slots 44 can accommodate the two knots at both ends.

[0050] The base 30 further includes an extension wall 36 extending from the side wall structure 31 toward the fixed portion. The extension wall 36 separates the second check valve 32 and the wire wheel 40 to prevent mutual interference therebetween. The base 30 further includes a first wire insertion portion 37 corresponding to the first wire inlet hole 34. The first wire insertion portion 37 includes a first wire inlet groove 371 communicating with the first wire inlet hole 34. The width of the first wire inlet groove 371 gradually increases in a direction away from the first wire inlet hole 34. As can be seen, the number of the first wire inlet holes 34, the first wire insertion portion 37, and the second wire inlet holes 45 can be determined as needed, and typically two are provided. Each end of the string passes through a corresponding first wire inlet groove 371, then through a corresponding first wire inlet hole 34 and a corresponding second wire inlet hole 45, before being inserted into the wire wheel 40. For example, when the string is pulled by tying a knot, the string remains engaged with the wire wheel 40 and will not come loose. Furthermore, to facilitate tying a knot after both ends of the string have passed through the base 30, the base 30 may further include through holes 38 penetrating the side wall structure 31. Each end of the string passes through a corresponding one of the first inlet grooves 371, then through a corresponding one of the first inlet holes 34 and one of the second inlet holes 45, and then through the through holes 38 to be exposed to the outside of the base 30. At this time, a knot can be tied at each end of the string. As can be seen, the width of the first inlet groove 371 gradually increases in the direction away from the first inlet hole 34, thereby making it easier to wind and unwind the string.

[0051] The chassis 50 is further snap-fit ​​to the base 30. The chassis 50 includes a bottom plate 51. A first locking groove 52 and a second locking groove 53 are formed on the bottom plate 51. The first locking groove 52 and the second locking groove 53 are spaced apart. The base 30 further includes a first locking member 311 and a second locking member 312 connected to the outer surface of the side wall structure 31. The first locking member 311 and the second locking member 312 are spaced apart and correspond to the first locking groove 52 and the second locking groove 53, respectively. The first locking member 311 can be inserted into the first locking groove 52 to engage with the side of the bottom plate 51 that faces away from the base 30. The second locking member 312 can be inserted into the second locking groove 53 to engage with the side of the bottom plate 51 that faces away from the base 30. The first locking member 311 and the second locking member 312 are both arc-shaped, and the first locking groove 52 and the second locking groove 53 are also arc-shaped. The chassis 50 further includes a side wall 54 connected to the bottom plate 51 at a side closer to the base 30. The side wall 54 and the bottom plate 51 together accommodate at least a portion of the side wall structure 31. A notch is further provided in the side wall 54 at a position corresponding to the first wire inlet hole 34.

[0052] The bottom plate 51 is provided with the first locking groove 52 and the second locking groove 53, the side wall structure 31 is provided with the first locking member 311 and the second locking member 312 on the outer surface thereof, the first locking member 311 is inserted into the first locking groove 52 to engage with the side of the bottom plate 51 away from the base 30, the second locking member 312 is inserted into the second locking groove 53 to engage with the side of the bottom plate 51 away from the base 30, and at least a portion of the side wall structure 31 is housed in the side wall portion 54 and the bottom plate 51 together, thereby making the overall structure compact, which is advantageous for reducing the size and weight of the string winding and unwinding device 1, and improving the stability of the overall structure.

[0053] As shown in FIGS. 1 to 8 , in the first embodiment, the knob 10 includes a raised structure 17 provided in the middle region of the cover plate 11. The forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 are recesses 123 sequentially formed on the outer surface of the raised structure 17. The base plate 21 includes a recessed structure 211 provided in the middle region. The second engagement portion 22 includes a locking hook 221 that fits into the recessed structure 211. The locking hook 221 engages with the recessed portion 123 of the forward rotation prevention engagement portion 122 or the recessed portion 123 of the reverse rotation prevention engagement portion 121. The locking hook 221 and the recessed structure 211 have a simple and reliable structure. Therefore, the cooperation between the locking hook 221 and the recessed portion 123 can reliably prevent rotation due to erroneous operation or automatic reset, thereby improving the reliability of the string winding and unwinding device 1.

[0054] In the first embodiment, a first position restricting portion 171 is further provided on the outer surface of the raised structure 17. A second position restricting portion 212 is further provided on the side wall surface of the recessed structure 211. One of the first position restricting portion 171 and the second position restricting portion 212 is a position restricting block, and the other of the first position restricting portion 171 and the second position restricting portion 212 is a position restricting slit. The position restricting block slides within the position restricting slit to restrict the relative rotation angle between the knob 10 and the ratchet disk 20, thereby allowing the forward rotation preventing engagement portion 122 and the reverse rotation preventing engagement portion 121 of the knob 10 to sequentially engage with and disengage from the second engagement portion 22 of the ratchet disk 20. As can be seen, the structures of the position restricting block and the position restricting slit are simple and reliable, so that the position restricting block and the position restricting slit cooperate to restrict the relative rotation angle between the knob 10 and the ratchet disk 20. As a result, the forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 of the knob 10 sequentially engage or disengage with the second engagement portion 22 of the ratchet disc 20, thereby improving the stability and user experience of the string winding and unwinding device 1.

[0055] In the first embodiment, the recess 123 includes a first surface 124 and a second surface 125 that are connected so as to be bent toward each other. The raised structure 17 has an arc-shaped surface that connects the first surface 124 and the second surface 125. The angle formed by the first surface 124 and a tangent to the connection point of the connected portion of the arc-shaped surface is different from the angle formed by the second surface 125 and a tangent to the connection point of the connected portion of the arc-shaped surface such that the external force required to disengage the locking hook 221 from the recess 123 of the forward rotation prevention engagement portion 122 is smaller than the external force required to disengage the locking hook 221 from the recess 123 of the reverse rotation prevention engagement portion 121. As can be seen, by installing the above structure, the external force required for the locking hook 221 to disengage from the recess 123 of the forward rotation prevention engagement portion 122 is smaller than the external force required for the locking hook 221 to disengage from the recess 123 of the reverse rotation prevention engagement portion 121, thereby improving the user experience.

[0056] 9 to 16, in the second embodiment, the forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 are recesses 123 on the cover plate 11 that are sequentially arranged along the circumferential direction. The second engagement portion 22 is a block 221 provided on the winding portion 43. The block engages with the recess 123 of the forward rotation prevention engagement portion 122 or the recess 123 of the reverse rotation prevention engagement portion 121. The structure of the block and the recess 211 is simple and highly reliable, and the cooperation of the block and the recess 123 can reliably prevent rotation phenomena due to incorrect operation or automatic reset, thereby improving the reliability of the string winding and unwinding device 1.

[0057] In the second embodiment, a first position restricting portion 171 is further provided on one side of the cover plate 11, and a second position restricting portion 212 is further provided on the side of the winding portion 43 closer to the cover plate 11. One of the first position restricting portion 171 and the second position restricting portion 212 is a position restricting block, and the other of the first position restricting portion 171 and the second position restricting portion 212 is a position restricting slit. The position restricting block slides through the position restricting slit to restrict the relative rotation angle between the knob 10 and the ratchet disk 20, thereby allowing the forward rotation preventing engagement portion 122 and the reverse rotation preventing engagement portion 121 of the knob 10 to sequentially engage with and disengage from the second engagement portion 22 of the ratchet disk 20. There are at least two first position restricting portions 171 and two second position restricting portions 212, and they are distributed circumferentially. As can be seen, the position restriction block and the position restriction slit have a simple structure and high reliability, and the position restriction block and the position restriction slit cooperate to restrict the relative rotation angle between the knob 10 and the ratchet disc 20. As a result, the forward rotation prevention engagement portion 122 and the reverse rotation prevention engagement portion 121 of the knob 10 sequentially engage with and disengage from the second engagement portion 22 of the ratchet disc 20, improving the stability of the string winding and unwinding device 1 and the user experience.

[0058] In the second embodiment, the recess 123 includes a first surface 124 and a second surface 125 that are connected so as to be bent toward each other. The angle formed between one main body surface of the cover plate 11 and the first surface 124 is different from the angle formed between one main body surface of the cover plate 11 and the second surface 125 so that the external force required to disengage the block from the recess 123 of the forward rotation prevention engagement portion 122 is smaller than the external force required to disengage the block from the recess 123 of the reverse rotation prevention engagement portion 121. As can be seen, by providing the above structure, the external force required to disengage the block from the recess 123 of the forward rotation prevention engagement portion 122 is smaller than the external force required to disengage the block from the recess 123 of the reverse rotation prevention engagement portion 121, thereby improving the user experience.

[0059] In the second embodiment, the axial height of the block in the direction from the knob 10 to the ratchet disc 20 is smaller than the axial height of the position-restricting block, so that when the block switches engagement with a different recess 123, the knob 10 remains connected to the ratchet disc 20, restricting their relative positions and preventing excessive rotation.

[0060] The installation and use of the string winding and unwinding device 1 according to the first and second embodiments will be described below.

[0061] During installation, first, the ratchet disk 20 is attached to the base 30, and the first tooth 232 of the first counterclockwise stopper 23 is properly engaged with the second counterclockwise stopper 32. Then, the knob 10 is rotated in the reverse direction to the released state by engaging the second engagement portion 22 with the forward rotation prevention engagement portion 122 based on the setting of the forward rotation prevention engagement portion. The base 30 is then attached, and the wire wheel 40 is press-fitted from the bottom. The knob 10 is then rotated forward approximately one full rotation. This completes the assembly of the main structure of the lace winding and unwinding device 1. Finally, the chassis 50 is attached. The chassis 50 can be attached to an object (e.g., a shoe) having laces. One end of the string can be passed through the first inlet hole 34 of the base 30 and the second inlet hole 45 of the wire wheel 40, and then a knot can be made and the knot can be accommodated in the wire wheel 40. As can be seen, after installation, the string winding and unwinding device 1 is in a winding state.

[0062] When a user needs to tighten the string while using the string winding and unwinding device 1, the user can rotate the knob 10 in the first clockwise direction. This causes the knob 10 to rotate the ratchet disc 20, which then rotates the wire wheel 40. This places the string winding and unwinding device 1 in a winding state, and the string is wound around the winding portion 43 and wound by the winding portion 43. Furthermore, due to cooperation between the first reverse stopper 23 and the second reverse stopper 32, the ratchet disc 20 and the wire wheel 40 cannot automatically reverse rotate. This allows the string to be wound around the wire wheel 40, allowing the string to be wound up. When the user stops rotating the knob 10, the reverse rotation prevention engagement portion 121 engages with the second engagement portion 22. When sufficient counter-rotation force is not applied to the knob 10, the knob 10 will not automatically reverse or rotate forward.

[0063] When a certain external force is applied to rotate the knob 10 in the reverse direction, the reverse rotation prevention engagement portion 121 disengages from the second engagement portion 22, allowing the knob 10 to rotate in the reverse direction. When the knob 10 rotates in the reverse direction, the inner surface 161 of the driving portion 15 presses the outer surface of the connecting portion of the ratchet disc 20, moving the second meshing portion 46 inward and disengaging it from the first meshing portion 24, thereby releasing the string winding and unwinding device 1. This allows the wire wheel 40 to freely rotate in the reverse direction within the base 30, thereby releasing the string. That is, the string can be pulled out from the wire wheel 40. In addition, when the second meshing portion 46 moves inward to disengage from the first meshing portion 24, the second engaging portion 22 of the ratchet disc 20 engages with the forward rotation preventing engaging portion 122, and the first position restricting portion 171 abuts against the second position restricting portion 212, preventing the knob 10 from being rotated excessively backward. In addition, because the forward rotation preventing engaging portion 122 engages with the second engaging portion 22, the knob 10 does not automatically rotate forward and release the second engaging portion 22 in the absence of external force, and the ratchet disc 20 meshes with the wire wheel 40, ensuring that the string is not freely pulled out.

[0064] As can be seen, in the released state, the top block 16 abuts between the inside of the first check portion 23 and the winding portion 43, preventing the first check portion 23 from separating from the second check portion 32. This ensures that the ratchet disc 20 engages with the base 30 but disengages from the wire wheel 40. That is, the ratchet disc 20 cannot rotate with the knob 10, but the knob 10 can continue to rotate in the first clockwise direction under certain external force conditions. After the top block 16 rotates with the knob 10 by a certain angle (e.g., the second engagement portion 22 disengages from the forward rotation prevention engagement portion 122 and engages with the reverse rotation prevention engagement portion 121), the top block 16 can be displaced from the second check portion 32 and separated. At this time, the first check portion 23 rotates relative to the second check portion 32, and the string winding and unwinding device 1 enters the winding state. That is, the knob 10 can move the ratchet disc 20 and the wire wheel 40 to rotate in the forward direction, thereby realizing the storage of the string.

[0065] Furthermore, as shown in Figures 17, 18, 19, and 20, the string winding and unwinding device 1 according to the third embodiment of the present invention is basically the same as the string winding and unwinding device 1 according to the first embodiment. The following mainly describes the differences between the two. In the third embodiment, the drive unit 15 includes a drive main body 151 and a stopper 152 connected to the drive main body 151. The side of the drive main body 151 abuts against the outer peripheral surface of the top block 16 and is used to drive the connection part 25. The stopper 152 is connected to one end of the drive main body 151 and is bent toward the center of the knob 10. The angle formed between the stopper 152 and the drive main body 151 may be an obtuse angle. The stopper portion 152 is used to stop the connecting portion 25 after it is driven, and is used to prevent the release state from being achieved due to the first meshing portion 24 sliding outward from the driving portion 15. The connecting portion 25 further includes an extension block 252 connected to the cylindrical body 251. The extension block 252 is used to abut against the top block 16 in the release state.

[0066] In the third embodiment, the upper surface of the side wall structure 31 of the base 30 is further provided with several alignment mounting points 301. The alignment mounting points 301 are used to assist in mounting the ratchet disc 20. Specifically, in order to easily mount the ratchet disc 20 to the base 30, the alignment mounting points 301 have the same number as the first check portions 23 and correspond to the positions of the first check portions 23.

[0067] Furthermore, as can be understood, as shown in FIG. 19, in order to increase the snap strength of the locking hook 221, the inner angle of the locking hook 221 is preferably an acute angle.

[0068] Furthermore, as shown in Figures 21, 22, 23, and 24, the string winding and unwinding device 1 according to the fourth embodiment of the present invention is basically the same as the string winding and unwinding device 1 described in the first embodiment. The following mainly describes the differences between the two. In the fourth embodiment, the drive unit 15 includes a drive main body 151 and a stopper 152 connected to the drive main body 151. The side of the drive main body 151 abuts against the outer peripheral surface of the top block 16 and is used to drive the connection part 25. The stopper 152 is connected to one end of the drive main body 151 and is bent toward the center of the knob 10. The angle formed between the stopper 152 and the drive main body 151 may be an obtuse angle. The stopper portion 152 is used to stop the connecting portion 25 after it is driven, and is used to prevent the release state from being achieved due to the first meshing portion 24 sliding outward from the driving portion 15. The connecting portion 25 further includes an extension block 252 connected to the cylindrical body 251. The extension block 252 is used to abut against the top block 16 in the release state.

[0069] In the fourth embodiment, several alignment mounting points are further provided on the upper surface of the side wall structure 31 of the base 30. The alignment mounting points are used to assist in mounting the ratchet disc 20. Specifically, the alignment mounting points have the same number as the first check portions 23 and correspond to the positions of the first check portions 23, so as to easily mount the ratchet disc 20 to the base 30.

[0070] Further, referring to Fig. 25, one aspect of the present application further provides a shoe 6. The shoe 6 includes a shoe body 61, a shoelace 62, and the lacing thread winding and unwinding device 1 described in any of the above embodiments. The shoelace 62 functions as a lace. The lacing thread winding and unwinding device 1 is used to wind and unwind the shoelace 62. Here, the chassis 50 of the lacing thread winding and unwinding device 1 is fixed to the shoe body 61.

[0071] In this embodiment, the shoelace 62 is wound and unwound using the lace winding and unwinding device 1 of any of the above embodiments, which simplifies operation and reduces the overall number of parts in the lace winding and unwinding device 1. This not only reduces assembly costs and improves assembly efficiency, but also makes the overall structure more compact, which is advantageous for reducing the size and weight of the lace winding and unwinding device 1. Furthermore, the reduced number of parts improves the stability of the overall structure, and improves the reliability and service life of the lace winding and unwinding device 1.

[0072] Referring to Fig. 26, one aspect of the present application further provides a hat 7. The hat 7 includes a hat body 71, a hat string 72, and the string winding and unwinding device 1 described in any of the above embodiments. The hat string 72 is used to fasten or release the hat body 71 and functions as a string. The string winding and unwinding device 1 is used to wind and unwind the hat string 72. Here, the chassis 50 of the string winding and unwinding device 1 is fixed to the hat body 71.

[0073] In this embodiment, the string winding and unwinding device 1 of any of the above embodiments is used to wind and unwind the hat string 72, which simplifies operation and reduces the overall number of parts in the string winding and unwinding device 1. This not only reduces assembly costs and improves assembly efficiency, but also makes the overall structure more compact, which is advantageous for reducing the size and weight of the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the stability of the overall structure, and improves the reliability and service life of the string winding and unwinding device 1.

[0074] Referring to Fig. 27, one aspect of the present application further provides a glove 8. The glove 8 includes a glove body 81, a glove string 82, and the string winding and unwinding device 1 described in any of the above embodiments. The glove string 82 is used to fasten or release the glove body 81 and functions as a string thread. The string winding and unwinding device 1 is used to wind and unwind the glove string 82. Here, the chassis 50 of the string winding and unwinding device 1 is fixed to the glove body 81.

[0075] In this embodiment, the string winding and unwinding device 1 of any of the above embodiments is used to wind and unwind the glove string 82, which simplifies operation and reduces the overall number of parts in the string winding and unwinding device 1. This not only reduces assembly costs and improves assembly efficiency, but also makes the overall structure more compact, which is advantageous for reducing the size and weight of the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the stability of the overall structure, and improves the reliability and service life of the string winding and unwinding device 1.

[0076] Referring to FIG. 28 , one aspect of the present application further provides a medical protective device 100. The medical protective device includes a medical protective device main body 101, a medical protective device string 102, and a string winding and unwinding device 103 according to any of the above-described embodiments. The medical protective device string 102 is used to tighten or loosen the opening of the medical protective device main body 101 and functions as the string. The string winding and unwinding device 103 is used to wind and unwind the medical protective device string. The medical protective device 100 may be an arm brace (e.g., sleeve covers), a leg brace (e.g., knee pads, wrist pads), or a waist or neck brace, and is not limited to the above-described embodiments.

[0077] Referring to FIG. 29 , one aspect of the present application further provides a storage device 9. The storage device 9 may be, but is not limited to, a backpack. The storage device 9 includes a storage body 91, a storage string 92, and the string winding and unwinding device 1 described in any of the above-described embodiments. The storage string 92 is used to tighten or loosen the storage body 91 and functions as the string. The string winding and unwinding device 1 is used to wind and unwind the storage string 92. Here, the base plate 50 of the string winding and unwinding device 1 is fixed to the storage body 91.

[0078] In this embodiment, the storage string 92 is wound and unwound using the string winding and unwinding device 1 according to any of the above-described embodiments, which simplifies operation and reduces the overall number of parts in the string winding and unwinding device 1. This not only reduces assembly costs and improves assembly efficiency, but also makes the overall structure compact, which is advantageous for reducing the size and weight of the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the stability of the overall structure, and improves the reliability and service life of the string winding and unwinding device 1.

[0079] The above examples are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art may still modify the technical solutions described in the above examples or replace some technical features therein with equivalents. These modifications or replacements do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the respective examples of the present application.

Claims

1. A string winding and unwinding device, a knob including a cover plate, a first engaging portion formed on one side of the cover plate, a driving portion formed on one side of the cover plate, a side plate connected to the one side of the cover plate, and a first position restricting portion connected to one end of the side plate farther from the cover plate; a ratchet disk including a base plate; a second engaging portion formed on one side of the base plate adjacent to the first engaging portion and adapted to engage with the first engaging portion; a first reverse stop portion formed on an outer edge of the base plate; a first meshing portion formed between the base plate and the first reverse stop portion; and a connecting portion connected to the first meshing portion; a base including a sidewall structure annularly provided on the outer periphery of the ratchet disc, a second reverse stop portion formed on the inner surface of the sidewall structure, and a second position restricting portion formed on the sidewall structure, the sidewall structure accommodating the ratchet disc, the sidewall structure further having a first threading hole passing therethrough, the second reverse stop portion engaging with the first reverse stop portion to allow the ratchet disc to rotate relative to the base in a predetermined clockwise direction, the second position restricting portion entering an accommodating space surrounded by the cover plate and the side plates and being positionally restricted within the accommodating space by the first position restricting portion, and the knob being capable of rotating the ratchet disc; a wire wheel located within the sidewall structure, the wire wheel including two opposing base plates disposed on the side of the ratchet disc away from the knob, a winding portion connected between the two base plates, an extension wall connected to the base plates closer to the ratchet disc, and a second meshing portion disposed inside the extension wall and cooperating with the first meshing portion, the winding portion including a second threading hole, allowing a string to pass through the first threading hole and the second threading hole and be placed on the wire wheel; a chassis located on a side of the base away from the knob and fixed to the base; When the first meshing portion meshes with the second meshing portion and the knob rotates in a first clockwise direction, the knob moves and rotates the ratchet disc, which in turn moves and rotates the wire wheel, thereby placing the cord winding and unwinding device in a winding state and winding the cord onto the winding portion for storage; when the knob rotates in a second clockwise direction opposite to the first clockwise direction, the driving unit drives the connecting unit to disengage the first meshing unit from the second meshing unit, thereby placing the string winding and unwinding device in a released state, and the wire wheel rotates to release the string.

2. 2. The string winding and unwinding device according to claim 1, wherein the knob further includes a top block provided on one side of the cover plate, the top block being in contact with the inside of the first reverse stop portion and the winding portion in the released state, thereby preventing the first reverse stop portion and the second reverse stop portion from separating.

3. the top block includes an inner surface and an outer surface, and a distance between the inner surface and the outer surface gradually decreases along the first clockwise direction; the connecting portion includes a cylindrical body; The string thread winding and unwinding device according to claim 2, wherein a side surface of the driving part is in contact with an outer peripheral surface of the cylindrical body and is used to drive the connecting part.

4. the connecting portion further includes an extension block connected to the cylindrical body; the extension block is used to abut against the top block in the released state; the drive unit includes a drive main body and a stopper connected to the drive main body, a side surface of the drive body portion is used to abut against an outer peripheral surface of the top block to drive the connection portion; The string winding and unwinding device according to claim 3, characterized in that the stopper portion is connected to the drive body portion so as to be bent, and is used to stop the top block after driving the connection portion and prevent the first meshing portion from sliding outward from the drive unit.

5. the first engagement portion includes a forward rotation prevention engagement portion and a reverse rotation prevention engagement portion, When the string winding and unwinding device is in the winding state, the reverse rotation prevention engagement portion engages with the second engagement portion, 3. The string winding and unwinding device according to claim 2, wherein the forward rotation prevention engaging portion engages with the second engaging portion when the string winding and unwinding device is in the released state.

6. There are at least two second engagement portions, and they are distributed sequentially along the circumferential direction; There are at least two forward rotation prevention engaging portions and at least two reverse rotation prevention engaging portions, and the engaging portions are sequentially distributed along the circumferential direction; There are at least two first meshing portions and at least two connecting portions, and the first meshing portions and connecting portions are sequentially distributed along the circumferential direction, The first check portion and the second check portion each include at least two, and are sequentially distributed along the circumferential direction; the number of said driving parts and said top blocks is the same and corresponds to the number of said connecting parts; the first check portion includes a resilient arm and a first check tooth portion connected to the resilient arm, and the second check portion includes a plurality of second check tooth portions connected in sequence along the circumferential direction, the first meshing portion includes a connecting arm and a first meshing tooth portion connected to the connecting arm; The string winding and unwinding device according to claim 5 , wherein the second meshing portion includes a plurality of second meshing teeth portions connected in sequence along the circumferential direction.

7. the knob includes a raised structure disposed on a middle region of the cover plate; the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses formed sequentially on the outer surface of the raised structure, the substrate includes a recess structure provided in an intermediate region; 6. The string winding and unwinding device of claim 5, wherein the second engagement portion includes a locking hook extending into the recess structure, and the locking hook engages with the recess of the forward rotation prevention engagement portion or the recess of the reverse rotation prevention engagement portion.

8. a first position restriction portion is further provided on an outer surface of the raised structure, a second position restriction portion is further provided on a side wall surface of the recessed portion structure, one of the first position regulating portion and the second position regulating portion is a position regulating block, and the other of the first position regulating portion and the second position regulating portion is a position regulating slit, and the position regulating block slides in the position regulating slit to regulate the relative rotation angle between the knob and the ratchet disk, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob are sequentially engaged with or disengaged from the second engaging portion of the ratchet disk, the recess includes a first surface and a second surface connected to each other so as to be folded, and the raised structure has an arc-shaped surface connecting the first surface and the second surface; 8. The string winding and unwinding device according to claim 7, wherein the angle formed by the tangent of the connection point between the first surface and the part of the arc-shaped surface connected thereto is different from the angle formed by the tangent of the second surface and the part of the arc-shaped surface connected thereto such that the external force required to disengage the locking hook from the recess of the forward rotation prevention engagement part is smaller than the external force required to disengage the locking hook from the recess of the reverse rotation prevention engagement part.

9. the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses that are sequentially provided in the cover plate along a circumferential direction, the second engagement portion is a block provided on the winding portion, 6. The string winding and unwinding device according to claim 5, wherein the block engages with a recess in the forward rotation prevention engaging portion or a recess in the reverse rotation prevention engaging portion.

10. a first position restricting portion is further provided on one side of the cover plate, and a second position restricting portion is further provided on a side of the winding portion closer to the cover plate, one of the first position restricting portion and the second position restricting portion is a position restricting block, and the other of the first position restricting portion and the second position restricting portion is a position restricting slit, the position restriction block slides in the position restriction slit to restrict the relative rotation angle between the knob and the ratchet disk, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob are sequentially engaged with or disengaged from the second engaging portion of the ratchet disk; the first position restricting portion and the second position restricting portion each have at least two, and are distributed along the circumferential direction, and an axial height of the block in a direction from the knob toward the ratchet disk is smaller than a height of the position restricting block along the axial height; the recess includes a first surface and a second surface connected to each other so as to be bent relative to each other; 10. The string winding and unwinding device of claim 9, wherein the angle between one of the main body surfaces of the cover plate and the first surface is different from the angle between one of the main body surfaces of the cover plate and the second surface such that the external force required to disengage the block from the recess of the forward rotation prevention engagement part is smaller than the external force required to disengage the block from the recess of the reverse rotation prevention engagement part.

11. 2. The string winding and unwinding device according to claim 1, wherein the base plate portion spaced from the ratchet disc includes at least one slot communicating with the second threading hole, the slot accommodating a knot for regulating the position of the string.

12. A shoe, The shoe includes a shoe body, a shoelace, and the lace winding and unwinding device according to any one of claims 1 to 11, The shoe is characterized in that the shoelace functions as the lace thread, and the lace thread winding and unwinding device is used to wind and unwind the shoelace.

13. A glove, The glove includes a glove body, a glove string, and the string winding and unwinding device according to any one of claims 1 to 11, The glove is characterized in that the glove string is used to tighten or release the glove body, the glove string functions as the string thread, and the string thread winding and unwinding device is used to wind and unwind the glove string.

14. A medical protective device, The medical protective device includes a medical protective device body, a medical protective device string, and the string winding and unwinding device according to any one of claims 1 to 11, the medical protective equipment string is used to tighten or loosen the opening of the medical protective equipment body; A medical protective device characterized in that the medical protective device string functions as the string thread, and the string thread winding and unwinding device is used to wind and unwind the medical protective device string.

15. A storage device, The storage device includes a storage body having an opening, a storage string, and the string winding and unwinding device according to any one of claims 1 to 11, The storage device is characterized in that the storage string is used to tighten or release the opening, the storage string functions as the string thread, and the string thread winding and unwinding device is used to wind and unwind the storage string.

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