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] This application relates to a cord winding and unwinding device, shoes, gloves, medical protective gear, and a storage device.

Background Art

[0002] Many daily necessities such as shoes, hats, sports shirts, and gloves are often provided with drawstrings to fit various users. By tightening the knot on the drawstring, the looseness of the product can be adjusted. However, in daily life, the tied drawstring often accidentally comes undone. For example, when the shoelace comes undone, it becomes dirty easily and there is also a risk of tripping and falling. In particular, young children cannot tie the strings themselves, and elderly people have weak physical conditions, so it is very inconvenient to bend down to tie the strings, which easily leads to risks such as falling.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In order to solve the above technical problems, it is necessary to provide a cord winding and unwinding device, shoes, gloves, medical protective gear, and a storage device.

Means for Solving the Problems

[0004] In the first aspect of this application, a cord winding and unwinding device is provided. The cord winding and unwinding device includes 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 far from the cover plate; a ratchet disk including a substrate, a second engaging portion formed on one side of the substrate close to the first engaging portion and engaging with the first engaging portion, a first anti-reverse portion formed on the outer edge of the substrate, a first meshing portion formed between the substrate and the first anti-reverse portion, and a connecting portion connected to the first meshing portion. A base comprising a side wall structure provided annularly on the outer circumference of the ratchet disc, a second check stop portion formed on the inner surface of the side wall structure, and a second position regulating portion formed on the side wall structure, wherein the side wall structure houses the ratchet disc, the side wall structure further has a first thread-through hole passing through it, and the second check stop portion engages with the first check stop portion, allowing the ratchet disc to rotate relative to the base in a predetermined clockwise direction, the second position regulating portion fits into a storage space surrounded by the cover plate and the side plate and is positioned within the storage space by the first position regulating portion, and the knob is a base that can rotate the ratchet disc, A wire wheel comprising: two base plates located within the side wall structure and provided on the side of the ratchet disc furthest from the knob and facing each other; a winding portion connected between the two base plates; an extension wall connected to the base plate near the ratchet disc; and a second engagement portion provided on the inside of the extension wall and for cooperating with the first engagement portion, wherein the winding portion includes a second thread hole, and the wire wheel is configured such that a string passes through the first thread hole and the second thread hole and is installed on the wire wheel. A chassis comprising a chassis located on the side of the base away from the knob and fixed to the base, When the first meshing portion engages with the second meshing portion and the knob rotates in the first clockwise direction, the knob moves the ratchet disc and rotates the wire wheel by the ratchet disc, thereby putting the string winding and unwinding device into a winding state and winding the string around the winding section to store it. When the knob rotates in a second clockwise direction opposite to the first clockwise direction, the drive unit drives the connection unit to disengage the first engagement unit from the second engagement unit, releasing the string winding and unwinding device, and the wire wheel rotates to release the string.

[0005] Compared to the prior art, in the string winding and unwinding device of the present invention, when the first engagement portion of the ratchet disc engages with the second engagement portion of the wire wheel and the knob rotates in the first clockwise direction, the knob rotates the ratchet disc, and the ratchet disc further rotates the wire wheel. This allows the string winding and unwinding device to be put into a winding state and 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 drive unit of the knob drives the connection portion of the ratchet disc, disengaging the first engagement portion of the ratchet disc from the second engagement portion of the wire wheel, and releasing the string winding and unwinding device. This allows the wire wheel to rotate within the base and unwind the string. The aforementioned string winding and unwinding device can wind the string in forward rotation and unwind it in reverse rotation, making it easy to operate and providing a favorable user experience. Furthermore, because the overall number of parts in the string winding and unwinding device is small, it not only reduces assembly costs and improves assembly efficiency, but also allows for a compact overall structure, which is advantageous for miniaturizing and lightening the string winding and unwinding device. In addition, the small number of parts improves the overall structural stability, thereby improving 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 used to abut between the inside of the first check stop and the winding portion in the released state to prevent the first check stop from detaching from the second check stop. As can be seen, the top block prevents the first check stop from detaching from the second check stop when 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. The distance between the inner surface and the outer surface gradually decreases along the first clockwise direction. This facilitates the top block to gradually increase the contact force, effectively preventing contact and preventing the first check stop from separating from the second check stop.

[0008] In one embodiment, the connecting portion includes a cylindrical body, and the side surface of the drive unit is used to drive the connecting portion by contacting the outer circumferential surface of the cylindrical body. As can be understood, by making the connecting portion a cylindrical body and having the side surface of the drive unit contact the outer circumferential surface of the cylindrical body, it is possible to ensure that the drive unit drives the connecting portion smoothly. As a result, the string winding and unwinding device can smoothly switch from the winding state to the unwinding state.

[0009] In one embodiment, 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 portion connected to the drive main body. The side surface of the drive main body is used to abut against the outer circumferential surface of the top block to drive the connecting portion. The stopper portion is connected to the drive main body so as to bend and is used to stop the top block after driving the connecting portion, preventing the first engaging portion from sliding out of the drive unit and preventing the released state from being achieved.

[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 phenomena due to erroneous operation or automatic return, thereby improving the reliability of the string winding and unwinding device.

[0011] In one embodiment, the second engagement portion comprises at least two and is sequentially distributed along the circumferential direction. The forward rotation prevention engagement portion and the reverse rotation prevention engagement portion each comprise at least two and are sequentially distributed along the circumferential direction. The first meshing portion and the connecting portion each comprise at least two and are sequentially distributed along the circumferential direction. The first check stop portion and the second check stop portion each comprise at least two and are sequentially distributed along the circumferential direction. The number of the drive portion and the top block corresponds to and matches the number of the connecting portion. The first check stop portion comprises an elastic arm and a first check stop tooth portion connected to the elastic arm. The second check stop portion comprises a plurality of second check stop tooth portions sequentially connected along the circumferential direction. The first meshing portion comprises a connecting arm and a first meshing tooth portion connected to the connecting arm. The second meshing portion comprises a plurality of second meshing tooth portions sequentially connected along the circumferential direction. To make it understandable, by installing the above-mentioned number of second engagement parts, forward rotation prevention engagement parts, reverse rotation prevention engagement parts, first meshing parts, connecting parts, first check stop parts, second check stop parts, drive parts, top block, second check stop teeth, and second meshing teeth, the technical effect of improving the stability and reliability of the string winding and unwinding device can be achieved.

[0012] In one embodiment, the knob includes a raised structure provided in the intermediate region of the cover plate. The forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses sequentially formed on the outer surface of the raised structure. The substrate includes a recessed structure provided in the intermediate region. The second engaging portion includes a locking hook that fits into the recessed structure. The locking hook engages with the recess of the forward rotation prevention engaging portion or with the recess of the reverse rotation prevention engaging portion. Because the locking hook and the recessed structure are simple and highly reliable, the cooperation between the locking hook and the recess can reliably prevent reverse rotation phenomena due to erroneous 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 provided on the outer surface of the raised structure. A second position restricting portion is provided on the side wall surface of the recessed structure. One of the first and second position restricting portions is a position restricting block, and the other of the first and second position restricting portions is a position restricting slit. The position restricting block slides within the position restricting slit, restricting the relative rotation angle between the knob and the ratchet disc, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging portion of the ratchet disc. As can be understood, the position restricting block and the position restricting slit are simple in structure and highly reliable, so that the cooperation of the position restricting block and the position restricting slit can restrict the relative rotation angle between the knob and the ratchet disc. As a result, the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging 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 so as to bend relative to each other. The raised structure has an arc-shaped surface connecting the first surface and the second surface. The angle between the first surface and the tangent to the connection point of a portion of the arc-shaped surface connected thereto is different from the angle between the second surface and the tangent to the connection point of a portion of the arc-shaped surface connected thereto. As a result, the external force required for the locking hook to disengage from the recess of the forward rotation prevention engagement is smaller than the external force required for the locking hook to disengage from the recess of the reverse rotation prevention engagement. To understand that the above structure can improve the user experience by making the external force required for the locking hook to disengage from the recess of the forward rotation prevention engagement smaller than the external force required for the locking hook to disengage from the recess of the reverse rotation prevention engagement.

[0015] In one embodiment, the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses sequentially provided 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 with the recess of the reverse rotation prevention engaging portion. Because the structure of the block and the recess is simple and highly reliable, the cooperation of the block and the recess can reliably prevent reverse rotation phenomena due to accidental contact or automatic return, thereby improving the reliability of the string winding and unwinding device.

[0016] In one embodiment, a first position restricting portion is provided on one side of the cover plate, and a second position restricting portion is provided on the side of the winding portion closer to the cover plate. One of the first and second position restricting portions is a position restricting block, and the other is a position restricting slit. The position restricting block slides within the position restricting slit, restricting the relative rotation angle between the knob and the ratchet disc, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging portion of the ratchet disc. There are at least two first and second position restricting portions, and they are distributed in the circumferential direction. As can be understood, the position restricting block and the position restricting slit are simple in structure and highly reliable, so that they work together to restrict the relative rotation angle between the knob and the ratchet disc, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging portion of the ratchet disc. This improves the stability and user experience of the string winding and unwinding device.

[0017] In one embodiment, the axial height of the block in the direction from the knob toward the ratchet disc is lower than the height of the position-regulating block along its axial height. This restricts the relative position of the knob and the ratchet disc while they remain connected, preventing excessive rotation, as the block switches engagement with different recesses.

[0018] In one embodiment, the recess includes a first surface and a second surface connected so as to bend relative to each other. The angle between one body surface of the cover plate and the first surface is different from the angle between one body surface of the cover plate and the second surface. This makes the external force required for the block to disengage from the recess of the forward rotation prevention engagement portion less than the external force required for the block to disengage from the recess of the reverse rotation prevention engagement portion. To understand this, by providing the above structure, the external force required for the block to disengage from the recess of the forward rotation prevention engagement portion is less than the external force required for the block to disengage from the recess of the reverse rotation prevention engagement portion, thereby improving the user experience.

[0019] In one embodiment, the substrate portion furthest from the ratchet disc is further provided with at least one slot communicating with the second wire entry hole, the slot being used to accommodate and position the knot of the string. By providing a slot to accommodate the knot of the string, the knot can be positioned, effectively preventing the knot from getting caught or coming off the wire wheel.

[0020] In one aspect of the present application, a shoe is further provided. The shoe includes a shoe body, shoelaces, and a shoelace winding and unwinding device as described in any of the embodiments described above. The shoelaces function as the shoelaces. The shoelace winding and unwinding device is used for winding and unwinding the shoelaces.

[0021] In one aspect of the present application, a type of hat is further provided. The hat includes a hat body, a hat string, and a string winding and unwinding device as described in any of the embodiments described above. The hat string is used to tighten or loosen the hat body and 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, another type of glove is provided. The glove includes a glove body, a glove string, and a winding and unwinding device for the string yarn described in any of the above embodiments. The glove string is used to tighten or release the glove body and functions as the string yarn. The winding and unwinding device for the string yarn is used for winding and unwinding the glove string.

[0023] In one aspect of the present application, another type of medical protective device is provided. The medical protective device includes a medical protective device body, a string of the medical protective device, and a winding and unwinding device for the string yarn described in any of the above embodiments. The string of the medical protective device is used to tighten or release the opening of the medical protective device body and functions as the string yarn. The winding and unwinding device for the string yarn is used for winding and unwinding the string of the medical protective device.

[0024] In one aspect of the present application, another type of storage device is provided. The storage device includes a storage body, a storage string, and a winding and unwinding device for the string yarn described in any of the above embodiments. The storage string is used to tighten or release the storage body and functions as the string yarn. The winding and unwinding device for the string yarn is used for winding and unwinding the storage string.

[0025] Note that the shoes, hats, gloves, medical protective devices, and storage devices provided in the above aspects are equipped with the winding and unwinding device for the string yarn described in any of the above embodiments, so they also have the technical effects of the winding and unwinding device for the string yarn in the above embodiments. Since the technical effects of each of the winding and unwinding device for the string yarn have been described in detail above, they will not be repeated here.

Brief Description of the Drawings

[0026] To more clearly explain the technical solutions in the embodiments of the present application or the prior art, the drawings necessary for the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiments of the present application, and those skilled in the art can also obtain other drawings from the provided drawings without creative labor.

[0027] [Figure 1] It is a perspective view of a string winding and feeding device according to the first embodiment of the present application. [Figure 2] It is an exploded view of the string winding and feeding device shown in FIG. 1. [Figure 3] It is an exploded view of the string winding and feeding device shown in FIG. 1 seen from another angle. [Figure 4] It is a cross-sectional view of the string winding and feeding device shown in FIG. 1. [Figure 5] It is a perspective view of the knob of the string winding and feeding device shown in FIG. 2. [Figure 6] It is a perspective view of the ratchet disk of the string winding and feeding device shown in FIG. 3. [Figure 7] It is a cross-sectional view of the string winding and feeding device shown in FIG. 1 when in the winding state. [Figure 8] It is a cross-sectional view of the string winding and feeding device shown in FIG. 1 when in the released state. [Figure 9] It is a perspective view of a string winding and feeding device according to the second embodiment of the present application. [Figure 10] It is an exploded view of the string winding and feeding device shown in FIG. 9. [Figure 11] It is an exploded view of the string winding and feeding device shown in FIG. 9 seen from another angle. [Figure 12] It is a cross-sectional view of the string winding and feeding device shown in FIG. 9. [Figure 13] It is a perspective view of the knob of the string winding and feeding device shown in FIG. 10. [Figure 14]Figure 11 is a perspective view of the ratchet disc of the string winding and unwinding device. [Figure 15] Figure 9 shows a cross-sectional view of the string winding and unwinding device when it is in the winding state. [Figure 16] Figure 9 shows a cross-sectional view of the string winding and unwinding device when it is in the open state. [Figure 17] This is an exploded view of a string winding and unwinding device according to the third embodiment of the present application. [Figure 18] Figure 17 is an exploded view of the string winding and unwinding device from a different angle. [Figure 19] Figure 17 shows a cross-sectional view of the string winding and unwinding device when it is in the winding state. [Figure 20] Figure 17 shows a cross-sectional view of the string winding and unwinding device when it is in the open state. [Figure 21] This is an exploded view of a string winding and unwinding device according to the fourth embodiment of the present application. [Figure 22] Figure 21 is an exploded view of the string winding and unwinding device from a different angle. [Figure 23] Figure 22 is a cross-sectional view of the string winding and unwinding device when it is in the winding state. [Figure 24] Figure 23 is a cross-sectional view of the string winding and unwinding device when it is in the released state. [Figure 25] A schematic diagram of the structure of a shoe according to one aspect of the present invention. [Figure 26] A schematic diagram of the structure of a hat according to one aspect of the present invention. [Figure 27] A schematic diagram of the structure of a glove according to one embodiment of the present invention. [Figure 28] A schematic diagram of the structure of a medical protective device relating to one aspect of the present invention. [Figure 29] A schematic diagram of the structure of a storage device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0028] Hereinafter, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings of the embodiments. Clearly, the embodiments described are only a selection of the embodiments of the present application, not all of them. All other embodiments that a person skilled in the art could obtain without creative work based on the embodiments of the present application are all within the scope of the protection of the present application.

[0029] To make the above-mentioned objectives, features, and advantages of this 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] To enable those in the art to better understand the technical proposals of this application, the technical proposals in the embodiments of this application will be clearly and completely described below, with reference to the accompanying drawings. Clearly, the embodiments described are only a selection of embodiments of this application, not all embodiments. All other embodiments obtained based on the embodiments of this application, without creative work by a person ordinary in the art, will all fall within the scope of protection of this application.

[0031] The terms “First,” “Second,” and “Third,” etc., in the description, claims, and accompanying drawings of this application are used to distinguish different subjects and not to describe a particular order. Furthermore, the term “includes” and any variation thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units already listed, and may selectively include steps or units not listed, or other steps or units specific to those processes, methods, products, or apparatus.

[0032] Please refer to Figures 1 to 16. Both the first and second embodiments of this application 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 engaging 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 disc 20 includes a substrate 21, a second engagement portion 22 formed on the side of the substrate 21 adjacent to the first engagement portion 12 and for engaging with the first engagement portion 12, a first check portion 23 formed on the outer edge of the substrate 21, a first meshing portion 24 formed between the substrate 21 and the first check portion 23, and a connecting portion 25 connected to the first meshing portion 24.

[0035] The base 30 includes a side wall structure 31 provided annularly on the outer circumference of the ratchet disc 20, a second check stop portion 32 formed on the inner surface of the side wall structure 31, and a second position regulating portion 33 formed on the side wall structure 31. The side wall structure 31 houses the ratchet disc 20. The side wall structure 31 also has a first wire entry hole 34 through it. The second check stop portion 32 engages with the first check stop portion 23, allowing the ratchet disc 20 to rotate relative to the base 30 along a predetermined clockwise direction. The second position regulating portion 33 is a housing space surrounded by the cover plate 11 and the side plate 13. 110 It moves inward, and the storage space is controlled by the first position regulating part 14 110 Its position is restricted internally. The knob 10 can rotate the ratchet disc 20.

[0036] The wire wheel 40 is located within the side wall structure 31 and is provided on the side of the ratchet disc 20 furthest from the knob 10. It includes two opposing base plates 42, a winding portion 43 connected between the two base plates 42, an extension wall 41 connected to the base plate 21 near the ratchet disc, and a second engagement portion 46 provided inside the extension wall 41 and cooperating with the first engagement portion 24. The winding portion 43 includes a second wire entry hole 45. This allows the string to pass through the first wire entry hole 34 and the second wire entry hole 45 and be provided on the wire wheel 40.

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

[0038] When the first engagement portion 24 engages with the second engagement portion 46 and the knob 10 rotates in the first clockwise direction, the knob 10 rotates the ratchet disc 20, and the ratchet disc 20 further 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 for storage.

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

[0040] Compared to the prior art, in the string winding and unwinding device 1 of the present invention, when the first engagement portion 24 of the ratchet disc 20 engages with the second engagement portion 46 of the wire wheel 40 and the knob 10 rotates in the first clockwise direction, the knob 10 moves and rotates the ratchet disc 20, and the ratchet disc 20 further 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 the second clockwise direction opposite to the first clockwise direction, the drive unit 15 of the knob 10 drives the connection portion 25 of the ratchet disc 20, disengaging the first engagement portion 24 of the ratchet disc 20 from the second engagement portion 46 of the wire wheel 40, and releasing the string winding and unwinding device 1. Furthermore, the wire wheel 40 can rotate to release the string. The string winding and unwinding device 1 can wind the string in forward rotation and release it in reverse rotation, making it easy to operate and providing a good user experience. In addition, the overall number of parts of 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 miniaturizing and lightening the string winding and unwinding device 1. Furthermore, the small 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. To make it clear, forward rotation refers to rotation along the first clockwise direction. Reverse rotation refers to rotation along the second clockwise direction, which is opposite to the first clockwise direction. In one embodiment, the first clockwise direction is clockwise and the second clockwise direction is counterclockwise, but in several other embodiments, the first clockwise direction may be counterclockwise and the second clockwise direction may be clockwise.

[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 check stop portion 23 and the winding portion 43 in the released state, preventing the first check stop portion 23 and the second check stop portion 32 from separating. As can be seen, the top block 16 prevents the first check stop portion 23 from separating from the second check stop portion 32 in the released state, facilitates switching from the released state to the winding state, and improves the reliability of the string winding and unwinding device 1.

[0042] In the first and second embodiments described above, 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 its contact force, thereby achieving effective contact and preventing separation between the first check valve 23 and the second check valve 32.

[0043] In the first and second embodiments described above, the connecting portion 25 is a cylindrical body, and the side surface of the drive unit 15 abuts against the outer circumferential surface of the cylindrical body and is used to drive the connecting portion 25. To make it clear, by making the connecting portion 25 a cylindrical body and having the side surface of the drive unit 15 abut against the outer circumferential surface of the cylindrical body, it is possible to ensure that the drive unit 15 drives the connecting portion 25 smoothly. As a result, the string winding and unwinding device 1 can smoothly switch from the winding state to the unwinding state.

[0044] In the first and second embodiments described above, 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 unwound 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 caused by erroneous operation or automatic return, thereby improving the reliability of the string winding and unwinding device 1.

[0045] Furthermore, there are at least two of the second engaging portion 22, and they are sequentially distributed along the circumferential direction. There are at least two of each of the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121, and they are sequentially distributed along the circumferential direction. There are at least two of each of the first meshing portion 24 and the connecting portion 25, and they are sequentially distributed along the circumferential direction. There are at least two of each of the first check stop portion 23 and the second check stop portion 32, and they are sequentially distributed along the circumferential direction. The number of the drive portion 15 and the top block 16 matches and corresponds to the number of the connecting portion 25. The first check stop portion 23 includes an elastic arm 231 and a first check stop tooth portion 232 connected to the elastic arm 231. The second check stop portion 32 includes a plurality of second check stop tooth portions sequentially connected 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 teeth portions connected sequentially along the circumferential direction. As can be understood, the arrangement of the above-mentioned number of second engagement portions 22, the forward rotation prevention engagement portion 122, the reverse rotation prevention engagement portion 121, the first meshing portion 24, the connecting portion 25, the first check stop portion 23, the second check stop portion 32, the drive portion 15, the top block 16, the second check stop teeth portion and the second meshing teeth portion provides the technical benefit 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 connecting portion, the first check stop portion 23, the drive portion 15, and the top block 16 may be three, and the number of the second check stop teeth and the second meshing teeth may be multiple.

[0046] Specifically, as shown in Figures 8 and 16, in the released state, the top block 16 abuts against the first check tooth portion 232 of the first check stop portion 23, and the first check stop portion 23 further abuts against and engages with the second check stop portion 32. When preventing forward rotation from starting, the knob 10 and the second check stop portion 32 start to rotate simultaneously. In this state, the drive unit 15 and the connecting portion 25 cannot separate from contact, or are unable to separate from contact. As a result, the first meshing tooth portion 242 of the first meshing portion 24 temporarily re-engages with the second meshing portion 46 of the wire wheel 40, preventing the winding of the string. In other words, after the top block 16 forcibly brings the first check tooth portion 232 into contact with the second check portion 32, when the user rotates the knob 10, the top block 16 prevents the first check tooth portion 232 from rotating and sliding out within the second check 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 (for example, the second engaging portion 22 disengages from the forward rotation prevention engaging portion 122 and engages with the reverse rotation prevention engaging portion 121). At the same time, the drive unit 15 and the connecting portion 25 also rotate by a certain angle. When the drive unit 15 and the connecting portion 25 disengage, the first meshing tooth portion 242 of the first meshing portion 24 re-engages with the second meshing portion 46 of the wire wheel 40, thereby switching to the winding state and enabling the winding of the string.

[0047] To make it clear, in the knob 10, the side plate 13 is an annular side plate connected to the outer edge of the cover plate 11. A non-slip structure 131 is further formed on the outer surface of the side plate 13. The non-slip structure 131 includes a plurality of non-slip grooves extending along a direction perpendicular to the cover plate 11. The plurality of non-slip grooves are arranged in an annular manner on the outer surface of the side plate 13. By forming the non-slip structure 131 on the outer surface of the side plate 13, a non-slip effect can be provided when rotating the knob 10, making it easy to operate. The first position regulating portion 14 may include at least two first extensions 141 extending inward from the side plate 13. The second position regulating portion 33 includes a second extension 331 that rises outward from the side wall structure 31. The second extension 331 has an annular structure and fits into the storage space surrounded by the side plate 13 and the cover plate 11, engaging with and fixing to the side of the first extension 141 closest to the cover plate 11. By making the second extension 331 annular structure and providing multiple first extensions 141, when the second extension 331 fits into the storage space surrounded by the side plate 13 and the cover plate 11 and engages with and fixes to the side of the first extension 141 closest to the cover plate 11, the operation can be made easier without being affected by the installation positions of the first extension 141 and the second extension 331.

[0048] Furthermore, to make it easier to understand, in the ratchet disc 20, one end of the elastic arm 231 furthest from the first check teeth 232 is connected to the outer edge of the substrate 21. The elastic arm 231 can deform to move the first check teeth 232 toward or toward the substrate 21. In the natural state of the elastic arm 231, the first check teeth 232 is toward and separated from the substrate 21. In the base 30, a plurality of the second check teeth are sequentially connected along the first clockwise direction and are arranged in an annular manner on the inner surface of the side wall structure 31 to engage with the first check teeth 232. The first check teeth 232 can rotate relative to the second check teeth along the first clockwise direction and engage with different second check teeth. This allows the ratchet disc 20 to be rotated by the knob 10, making it easy to operate and providing a stable structure. To make it clear, under the action of an external force, the first check tooth portion 232 rotates relative to the second check tooth portion only along the first clockwise direction (for example, clockwise), and can engage with a different second check tooth portion, but cannot rotate in the opposite direction. This achieves the check function. In this embodiment, the first clockwise direction is clockwise and the second clockwise direction is counterclockwise, but it is not limited to this, and in modified examples, the first clockwise direction may be counterclockwise and the second clockwise direction may be clockwise. In addition, the elastic arm 231 facilitates the mounting of the ratchet disc 20.

[0049] In the wire wheel 40, the two base portions 42 and the winding portion 43 connected between the two base portions 42 can surround a storage portion 49 for storing the string. The storage portion 49 allows the string to be neatly stored in the wire wheel 40, preventing the string from getting tangled in other positions and affecting other parts. Furthermore, the base portion 42 spaced apart from the ratchet disc 20 further includes at least one slot 44 communicating with the second wire entry hole 45. The slot 44 is used to locate 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 restricted, effectively preventing the knot from getting stuck or detaching from the wire wheel. To understand this, the number of the second wire entry hole 45 and the number of the slots 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] Furthermore, the base 30 further includes an extension wall 36 extending from the side wall structure 31 toward the fixing portion. The extension wall 36 separates the second check stop portion 32 from the wire wheel 40, preventing mutual interference between them. The base 30 further includes a first wire insertion portion 37 provided corresponding to the first wire entry hole 34. The first wire insertion portion 37 includes a first wire entry groove 371 communicating with the first wire entry hole 34. The width of the first wire entry groove 371 gradually increases along the direction away from the first wire entry hole 34. To understand this, the number of the first wire entry hole 34, the first wire insertion portion 37, and the second wire entry hole 45 is provided as needed, and is usually two. Each end of the string passes through one of the corresponding first wire entry grooves 371, then through one of the corresponding first wire entry holes 34 and one of the second wire entry holes 45, before being provided in the wire wheel 40. For example, by making a knot, when the string is pulled, the string remains locked to the wire wheel 40 and does not come loose. Furthermore, to facilitate the making of knots after both ends of the string have passed through the base 30, the base 30 may further include through holes 38 that penetrate the side wall structure 31. Each end of the string passes through a corresponding first entry groove 371, then through a corresponding first entry hole 34, a second entry hole 45, and then through the through holes 38, and is exposed outside the base 30. At this point, a knot can be made at each end of the string. As can be seen, the width of the first entry groove 371 gradually increases along the direction away from the first entry hole 34, making the winding and unwinding of the string easier.

[0051] The chassis 50 is further snapped and fixed to the base 30. The chassis 50 includes a bottom plate 51. The bottom plate 51 has a first locking groove 52 and a second locking groove 53 formed therein, the first locking groove 52 and the second locking groove 53 being 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 enter into the first locking groove 52 and engage with the side of the bottom plate 51 away from the base 30. The second locking member 312 can enter into the second locking groove 53 and engage with the side of the bottom plate 51 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 both arc-shaped. The chassis 50 further includes a side wall portion 54 connected to the side of the bottom plate 51 closer to the base 30. The side wall portion 54 and the bottom plate 51 together house at least a portion of the side wall structure 31. A notch is further provided in the side wall portion 54 at the location corresponding to the first wire entry hole 34.

[0052] By providing the first locking groove 52 and the second locking groove 53 in the bottom plate 51, and providing the first locking member 311 and the second locking member 312 on the outer surface of the side wall structure 31, by placing the first locking member 311 in the first locking groove 52 and engaging it with the side of the bottom plate 51 away from the base 30, and by inserting the second locking member 312 into the second locking groove 53 and engaging it with the side of the bottom plate 51 away from the base 30, and by jointly housing at least a part of the side wall structure 31 with the side wall portion 54 and the bottom plate 51, the overall structure becomes compact, which is advantageous for miniaturizing and lightening the string winding and unwinding device 1, and can improve the stability of the overall structure.

[0053] As shown in Figures 1 to 8, in the first embodiment, the knob 10 includes a raised structure 17 provided in the intermediate region of the cover plate 11. The forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 are recesses 123 sequentially formed on the outer surface of the raised structure 17. The substrate 21 includes a recessed structure 211 provided in the intermediate region. The second engaging portion 22 includes a locking hook 221 that fits into the recessed structure 211. The locking hook 221 engages with the recess 123 of the forward rotation prevention engaging portion 122 or with the recess 123 of the reverse rotation prevention engaging portion 121. Since the locking hook 221 and the recessed structure 211 have a simple structure and high reliability, the cooperation between the locking hook 221 and the recess 123 can stably prevent rotation phenomena due to erroneous operation or automatic return, 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, restricting the relative rotation angle between the knob 10 and the ratchet disc 20, so that the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 of the knob 10 sequentially engage with or disengage from the second engaging portion 22 of the ratchet disc 20. As can be understood, the structure of the position restricting block and the position restricting slit is simple and reliable, so that the cooperation of the position restricting block and the position restricting slit can restrict the relative rotation angle between the knob 10 and the ratchet disc 20. As a result, the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 of the knob 10 sequentially engage with or disengage from the second engaging portion 22 of the ratchet disc 20, thereby improving the stability of the string winding and unwinding device 1 and the user experience.

[0055] In the first embodiment, the recess 123 includes a first surface 124 and a second surface 125 connected so as to bend relative to each other. The raised structure 17 has an arc-shaped surface connecting the first surface 124 and the second surface 125. The angle between the first surface 124 and the tangent to the connection point of a portion of the arc-shaped surface connected thereto is different from the angle between the second surface 125 and the tangent to the connection point of a portion of the arc-shaped surface connected thereto, such that 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. To make it clear, 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 engaging 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 engaging portion 121, thereby improving the user experience.

[0056] As shown in Figures 9 to 16, in the second embodiment, the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 are recesses 123 on the cover plate 11 that are sequentially provided along the circumferential direction. The second engaging portion 22 is a block 221 provided on the winding portion 43. The block engages with the recess 123 of the forward rotation prevention engaging portion 122 or with the recess 123 of the reverse rotation prevention engaging portion 121. Because the block and the recess structure 211 are simple and highly reliable, the cooperation between the block and the recess 123 can reliably prevent rotation phenomena caused by erroneous operation or automatic return, 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 within the position restricting slit, restricting the relative rotation angle between the knob 10 and the ratchet disc 20, so that the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 of the knob 10 sequentially engage with or disengage from the second engaging portion 22 of the ratchet disc 20. There are at least two first position restricting portions 171 and the second position restricting portions 212, and they are distributed along the circumferential direction. As can be understood, the position regulating block and the position regulating slit have a simple and reliable structure, so that the cooperation between the position regulating block and the position regulating slit can regulate the relative rotation angle between the knob 10 and the ratchet disc 20. As a result, the forward rotation prevention engaging portion 122 and the reverse rotation prevention engaging portion 121 of the knob 10 sequentially engage or disengage with the second engaging portion 22 of the ratchet disc 20, improving the stability and user experience of the string winding and unwinding device 1.

[0058] In the second embodiment, the recess 123 includes a first surface 124 and a second surface 125 connected so as to bend relative to each other. The angle between one body surface of the cover plate 11 and the first surface 124 is different from the angle between one body surface of the cover plate 11 and the second surface 125, such that the external force required for the block to disengage from the recess 123 of the forward rotation prevention engagement portion 122 is smaller than the external force required for the block to disengage from the recess 123 of the reverse rotation prevention engagement portion 121. As can be seen, the above configuration makes it possible to improve the user experience by making the external force required for the block to disengage from the recess 123 of the forward rotation prevention engagement portion 122 smaller than the external force required for the block to disengage from the recess 123 of the reverse rotation prevention engagement portion 121.

[0059] In the second embodiment, the axial height of the block in the direction from the knob 10 toward the ratchet disc 20 is smaller than the height of the position-regulating block along its axial height. This ensures that when the block switches engagement with different recesses 123, the knob 10 remains connected to the ratchet disc 20, regulating its relative position and preventing excessive rotation.

[0060] The following describes the installation and usage process of the string winding and unwinding device 1 described in the first and second embodiments.

[0061] During installation, first, the ratchet disc 20 is attached to the base 30, and it is ensured that the first check tooth portion 232 of the first check portion 23 and the second check portion 32 engage correctly. Then, the knob 10 is engaged with the second engagement portion 22 and the forward rotation prevention engagement portion 122 based on the setting of the forward rotation prevention engagement portion, and the knob 10 is put into the winding state. After that, the knob 10 is rotated in the reverse direction until it is released. Then, the base 30 is attached and the wire wheel 40 is pressed in from the bottom. After that, the knob 10 is rotated approximately one turn in the forward direction. This completes the assembly of the main structure of the string winding and unwinding device 1. Finally, the chassis 50 is attached. Here, the chassis 50 can be installed on the body of an object having a string (for example, a shoe). One end of the string can be passed through the first entry hole 34 of the base 30 and the second entry hole 45 of the wire wheel 40, then a knot can be made and the knot can be housed inside the wire wheel 40. To make it clear, after installation, the string winding and unwinding device 1 is in the winding state.

[0062] When a user uses the string winding and unwinding device 1, if it is necessary to tighten the string, the knob 10 can be rotated along the first clockwise direction. This causes the knob 10 to move and rotate 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 the winding state, and the string is wound around the winding section 43 and wound up by the winding section 43. Furthermore, due to the cooperation of the first reverse locking section 23 and the second reverse locking section 32, the ratchet disc 20 cannot automatically rotate in reverse, and the wire wheel 40 cannot automatically rotate in reverse either. This allows the string to be wound around the wire wheel 40 and the string to be wound up. When the rotation of the knob 10 is stopped, the reverse rotation prevention engaging section 121 engages with the second engaging section 22. When sufficient reverse rotational force is not applied to the knob 10, the knob 10 will not automatically reverse or rotate forward.

[0063] When a constant external force is applied to rotate the knob 10 in the reverse direction, the reverse rotation prevention engaging portion 121 disengages from the second engaging portion 22, and the knob 10 can be reversed. When the knob 10 is reversed, the inner surface 161 of the drive unit 15 presses against 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. As a result, the wire wheel 40 can freely rotate in the reverse direction within the base 30 to release the string. In other words, at this time, the string can be pulled out from the wire wheel 40. Furthermore, when the second engagement portion 46 moves inward and disengages from the first engagement portion 24, the second engagement portion 22 of the ratchet disc 20 engages with the forward rotation prevention engagement portion 122, and the first position restricting portion 171 comes into contact with the second position restricting portion 212, preventing the knob 10 from being excessively reversed. Also, because the forward rotation prevention engagement portion 122 engages with the second engagement portion 22, in the absence of external force, the knob 10 does not automatically rotate in the forward direction and release the second engagement portion 22, ensuring that the ratchet disc 20 engages with the wire wheel 40 and that the string is not freely pulled out.

[0064] To make it understandable, the top block 16, in its released state, abuts between the inside of the first check stop portion 23 and the winding portion 43, thereby preventing the first check stop portion 23 from separating from the second check stop portion 32. This ensures that the ratchet disc 20 engages with the base 30 but disengages from the wire wheel 40. In other words, the ratchet disc 20 cannot rotate with the knob 10, but the knob 10 can continue to rotate along the first clockwise direction under certain external force conditions. After the top block 16 has rotated by a certain angle with the knob 10 (for example, 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 and separated from the second check stop portion 32. At this time, the first check stop portion 23 rotates relative to the second check stop portion 32, and the string winding and unwinding device 1 enters the winding state. In other words, the knob 10 moves the ratchet disc 20 and the wire wheel 40 to rotate in the forward direction, thereby enabling 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 application is basically the same as the string winding and unwinding device 1 of the first embodiment described above. The differences between the two will be mainly described below. In the third embodiment, the drive unit 15 includes a drive body 151 and a stopper 152 connected to the drive body 151. The side surface of the drive body 151 is used to drive the connection 25 by contacting the outer circumferential surface of the top block 16. The stopper 152 is connected to one end of the drive body 151 and is bent in a direction toward the center of the knob 10. The angle between the stopper 152 and the drive body 151 may be obtuse. The stopper portion 152 is used to stop the connecting portion 25 after it has been driven, and is used to avoid the phenomenon in which the release state cannot be achieved due to the first engaging portion 24 sliding out of the drive 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, several alignment mounting points 301 are provided on the upper surface of the side wall structure 31 of the base 30. The alignment mounting points 301 are used to assist in the mounting of the ratchet disc 20. Specifically, in order to easily mount the ratchet disc 20 to the base 30, the number of alignment mounting points 301 matches the number of the first check stop portion 23 and corresponds to the position of the first check stop portion 23.

[0067] Furthermore, as can be understood, as shown in Figure 19, it is preferable that the inner angle of the locking hook 221 be acute in order to increase the snap strength of the locking hook 221.

[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 application is basically the same as the string winding and unwinding device 1 described in the first embodiment. The differences between the two will be mainly explained below. In the fourth embodiment, the drive unit 15 includes a drive body 151 and a stopper 152 connected to the drive body 151. The side surface of the drive body 151 is used to drive the connection 25 by contacting the outer circumferential surface of the top block 16. The stopper 152 is connected to one end of the drive body 151 and is bent in a direction toward the center of the knob 10. The angle between the stopper 152 and the drive body 151 may be obtuse. The stopper portion 152 is used to stop the connecting portion 25 after it has been driven, and is used to avoid the phenomenon in which the release state cannot be achieved due to the first engaging portion 24 sliding out of the drive 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 described above, several more alignment mounting points are provided on the upper surface of the side wall structure 31 of the base 30. These alignment mounting points are used to assist in the mounting of the ratchet disc 20. Specifically, in order to easily mount the ratchet disc 20 to the base 30, the number of alignment mounting points matches the number of the first check stop portion 23 and corresponds to the position of the first check stop portion 23.

[0070] See also Figure 25. In one embodiment of the present application, a shoe 6 is further provided. The shoe 6 includes a shoe body 61, shoelaces 62, and a shoelace winding and unwinding device 1 as described in any of the above embodiments. The shoelaces 62 function as laces. The shoelace winding and unwinding device 1 is used to wind and unwind the shoelaces 62. Here, the chassis 50 of the shoelace winding and unwinding device 1 is fixed to the shoe body 61.

[0071] In this embodiment, by using the shoelace winding and unwinding device 1 of any of the above embodiments to wind and unwind the shoelace 62, operation is simple and the overall number of parts of the shoelace winding and unwinding device 1 can be reduced. This not only reduces assembly costs and improves assembly efficiency, but also allows for a more compact overall structure, which is advantageous for miniaturizing and lightening the shoelace winding and unwinding device 1. Furthermore, the reduced number of parts improves the overall structural stability, thereby improving the reliability and service life of the shoelace winding and unwinding device 1.

[0072] Refer to Figure 26. In one embodiment of the present application, a hat 7 is further provided. The hat 7 includes a hat body 71, a hat string 72, and a string winding and unwinding device 1 as described in any of the above embodiments. The hat string 72 is used to tighten or loosen 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, by using the string winding and unwinding device 1 of any of the above embodiments to wind and unwind the hat string 72, operation is simple and the overall number of parts of the string winding and unwinding device 1 can be reduced. This not only reduces assembly costs and improves assembly efficiency, but also allows for a more compact overall structure, which is advantageous for miniaturizing and lightening the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the overall structural stability, thereby improving the reliability and service life of the string winding and unwinding device 1.

[0074] Refer to Figure 27. In one embodiment of the present application, a glove 8 is further provided. The glove 8 includes a glove body 81, a glove string 82, and a string winding and unwinding device 1 as described in any of the above embodiments. The glove string 82 is used to tighten or loosen the glove body 81 and functions as a string. 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, by using the string winding and unwinding device 1 of any of the above embodiments to wind and unwind the glove string 82, operation is simple and the overall number of parts of the string winding and unwinding device 1 can be reduced. This not only reduces assembly costs and improves assembly efficiency, but also allows for a more compact overall structure, which is advantageous for miniaturizing and lightening the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the overall structural stability, thereby improving the reliability and service life of the string winding and unwinding device 1.

[0076] Refer to Figure 28. In one embodiment of the present application, a medical protective device 100 is further provided. The medical protective device includes a medical protective device body 101, a medical protective device cord 102, and a cord winding and unwinding device 103 as described in any of the above embodiments. The medical protective device cord 102 is used to tighten or loosen the opening of the medical protective device body 101 and functions as the cord. The cord winding and unwinding device 103 is used to wind and unwind the medical protective device cord. The medical protective device 100 may be an arm orthosis (e.g., a sleeve cover), a leg orthosis (e.g., a knee pad, a wrist pad), or an orthosis for the waist or neck, and is not limited to the above embodiments.

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

[0078] In this embodiment, by using the string winding and unwinding device 1 according to any of the above embodiments to wind and unwind the storage string 92, operation is simple and the overall number of parts of the string winding and unwinding device 1 can be reduced. This not only reduces assembly costs and improves assembly efficiency, but also allows for a more compact overall structure, which is advantageous for miniaturizing and lightening the string winding and unwinding device 1. Furthermore, the reduced number of parts improves the overall structural stability, thereby improving the reliability and service life of the string winding and unwinding device 1.

[0079] The embodiments described above are used solely to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the embodiments described above, those skilled in the art can still modify the technical solutions described in the embodiments described above or substitute some of the technical features therein for equivalent purposes. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for winding and unwinding string, A knob comprising a cover plate, a first engaging portion formed on one side of the cover plate, a drive portion formed on one side of the cover plate, a side plate connected to one side of the cover plate, and a first position regulating portion connected to the end of the side plate furthest from the cover plate, A ratchet disc comprising a substrate, a second engaging portion formed on one side of the substrate adjacent to a first engaging portion and for engaging with the first engaging portion, a first check portion formed on the outer edge of the substrate, a first meshing portion formed between the substrate and the first check portion, and a connecting portion connected to the first meshing portion, A base comprising a side wall structure provided annularly on the outer circumference of the ratchet disc, a second check stop portion formed on the inner surface of the side wall structure, and a second position regulating portion formed on the side wall structure, wherein the side wall structure houses the ratchet disc, the side wall structure further has a first thread-through hole passing through it, and the second check stop portion engages with the first check stop portion, allowing the ratchet disc to rotate relative to the base in a predetermined clockwise direction, the second position regulating portion fits into a storage space surrounded by the cover plate and the side plate and is positioned within the storage space by the first position regulating portion, and the knob is a base that can rotate the ratchet disc, A wire wheel comprising: two base plates located within the side wall structure and provided on the side of the ratchet disc furthest from the knob and facing each other; a winding portion connected between the two base plates; an extension wall connected to the base plate near the ratchet disc; and a second engagement portion provided on the inside of the extension wall and for cooperating with the first engagement portion, wherein the winding portion includes a second thread hole, and the wire wheel is configured such that a string passes through the first thread hole and the second thread hole and is installed in the wire wheel. A chassis comprising a chassis located on the side of the base away from the knob and fixed to the base, When the first meshing portion engages with the second meshing portion and the knob rotates in the first clockwise direction, the knob moves the ratchet disc and rotates the wire wheel by the ratchet disc, thereby putting the string winding and unwinding device into a winding state and winding the string around the winding section to store it. A string winding and unwinding device characterized in that, when the knob rotates in a second clockwise direction opposite to the first clockwise direction, the drive unit drives the connecting part to disengage the first meshing part from the second meshing part, thereby releasing the string winding and unwinding device, and further the wire wheel rotates to release the string.

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, and the top block is used to prevent the first and second check stop portions from separating by contacting the inside of the first check stop portion and the winding portion in the open state.

3. 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. The aforementioned connecting portion includes a cylindrical body, The string winding and unwinding device according to claim 2, characterized in that the side surface of the drive unit abuts against the outer circumferential surface of the cylindrical body and is used to drive the connecting unit.

4. The connecting portion further includes an extension block connected to the cylindrical body, The extension block is used to contact the top block in the released state. The drive unit includes a drive body and a stopper connected to the drive body. The side surface of the drive body is used to drive the connection part by contacting the outer circumferential surface of the top block. 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 bend, and is used to stop the top block after driving the connection portion, thereby preventing the first meshing portion from sliding out of the drive portion.

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 engaging portion engages with the second engaging portion. The string winding and unwinding device according to claim 2, characterized in that 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. The second engaging portion comprises at least two parts and is sequentially distributed along the circumferential direction. The forward rotation prevention engaging portion and the reverse rotation prevention engaging portion each consist of at least two, and are sequentially distributed along the circumferential direction. The first meshing portion and the connecting portion each consist of at least two, and are sequentially distributed along the circumferential direction. The first and second check valves each consist of at least two, and are sequentially distributed along the circumferential direction. The number of the drive unit and the top block is the same as and corresponds to the number of the connection unit. The first check stop portion includes an elastic arm and a first check stop tooth portion connected to the elastic arm, and the second check stop portion includes a plurality of second check stop tooth portions sequentially connected 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, characterized in that the second meshing portion includes a plurality of second meshing teeth sequentially connected along the circumferential direction.

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

8. A first position regulating portion is further provided on the outer surface of the aforementioned raised structure. A second position regulating 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, and the position restricting block slides within the position restricting slit to restrict the relative rotation angle of the knob and the ratchet disc, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging portion of the ratchet disc, The recess includes a first surface and a second surface connected so as to be bent relative to each other, and the raised structure has an arc-shaped surface connecting the first surface and the second surface. The string winding and unwinding device according to claim 7, characterized in that the angle between the first surface and the tangent to the connection point of a portion of the arc-shaped surface connected thereto is different from the angle between the second surface and the tangent to the connection point of a portion of the arc-shaped surface connected thereto, such that the external force required for the locking hook to disengage from the recess of the forward rotation prevention engaging portion is smaller than the external force required for the locking hook to disengage from the recess of the reverse rotation prevention engaging portion.

9. The forward rotation prevention engaging portion and the reverse rotation prevention engaging portion are recesses sequentially provided on the cover plate along the circumferential direction. The second engaging portion is a block provided on the winding portion, The string winding and unwinding device according to claim 5, characterized in that the block engages with the recess of the forward rotation prevention engaging portion or with the recess of 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 the side of the winding portion closest 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 regulating block slides within the position regulating slit, thereby regulating the relative rotation angle between the knob and the ratchet disc, so that the forward rotation prevention engaging portion and the reverse rotation prevention engaging portion of the knob sequentially engage with or disengage from the second engaging portion of the ratchet disc. The first position restricting portion and the second position restricting portion each consist of at least two, and are distributed along the circumferential direction, and the axial height of the block in the direction from the knob toward the ratchet disc is smaller than the height of the position restricting block along the axial height. The recess includes a first surface and a second surface that are connected so as to be bent relative to each other. The string winding and unwinding device according to claim 9, characterized in that the angle between one main surface of the cover plate and the first surface is different from the angle between one main surface of the cover plate and the second surface, such that the external force required for the block to disengage from the recess of the forward rotation prevention engaging portion is smaller than the external force required for the block to disengage from the recess of the reverse rotation prevention engaging portion.

11. The string winding and unwinding device according to claim 1, wherein the substrate portion spaced apart from the ratchet disc includes at least one slot communicating with the second thread hole, and the slot accommodates a knot for positioning the string.

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

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

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

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

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