A take-up and pay-off device and an article having the same

Abstract

The application discloses a take-up and pay-off device and an article with the same, and belongs to the technical field of take-up and pay-off devices. The take-up and pay-off device comprises a mounting piece, a check piece, a winding wheel for winding, an elastic piece and a rotating piece. The mounting piece has a containing cavity with two open ends; the check piece is connected with one end of the mounting piece, and a first elastic arm is arranged on the outer periphery of the check piece, and a first check part is arranged on the outer peripheral edge of the first elastic arm; the winding wheel for winding is arranged in the containing cavity and can rotate around the axis, and a first clamping part is arranged on the outer periphery of one end of the winding wheel close to the check piece; the elastic piece is arranged in the containing cavity and connected with the cavity wall of the containing cavity and the first clamping part respectively; and the rotating piece is provided with a second clamping part matched with the first clamping part on the side facing the mounting piece, and is provided with a second check part matched with the first check part. The take-up and pay-off device provided by the application saves time and effort, and effectively improves the use convenience and user experience.

Description

Technical Field

[0001] This application relates to the field of wire take-up and take-up devices, and more particularly to a wire take-up and take-up device and an article having the same. Background Technology

[0002] A thread reel device is a device that allows for the reeling in and unreeling of threads. It is typically used in conjunction with different bases in applications such as shoes, hats, and clothing where the threads need to be tightened or loosened. For example, when used in shoes, it is usually installed on the tongue or side of the shoe, and the shoelaces pass through the device. The thread reeling in and unreeling function of the device allows the shoelaces to be tightened or loosened, thus enabling the shoelaces to be tied or untied.

[0003] Existing cable winding and unwinding devices generally include a winding wheel for winding the cable, a rotating mechanism connected to the winding wheel, a limiting device and a check disc positioned between the winding wheel and the rotating mechanism. When tightening the cable, pressing the rotating mechanism locks both the winding wheel and the check disc in place. Then, rotating the rotating mechanism clockwise causes the winding wheel to rotate clockwise synchronously, thus tightening the cable. When loosening the cable, pulling up the rotating mechanism releases both the winding wheel and the check disc, allowing the winding wheel to rotate freely. The user can then pull the cable to loosen it by rotating the winding wheel counter-clockwise. However, when the cable needs to be tightened again after loosening, the user must press the rotating mechanism again and rotate it clockwise a considerable number of times, which is time-consuming, laborious, and inconvenient to use. Summary of the Invention

[0004] In order to achieve the above objectives, this application aims to provide a take-up and release device to solve the technical problem of inconvenient operation of existing take-up and release devices.

[0005] The technical solution adopted is as follows:

[0006] In a first aspect, embodiments of this application provide a wire take-up and pay-off device, including:

[0007] The mounting component has a receiving cavity with openings at both ends;

[0008] A check valve is connected to one end of the mounting component. The check valve has a first elastic arm in the outer peripheral direction, and a first check portion is provided at the outer peripheral edge of the first elastic arm.

[0009] A winding wheel for winding is rotatably disposed in the receiving cavity about an axial direction, and a first snap-fit ​​portion is provided on the outer circumference of one end of the winding wheel near the anti-return element.

[0010] An elastic element is disposed within the receiving cavity and is connected to the cavity wall of the receiving cavity and the first snap-fit ​​portion, respectively.

[0011] The rotating component has a second locking portion that mates with the first locking portion on the side facing the mounting component, and a second check portion that mates with the first check portion.

[0012] In one embodiment of the first aspect, the elastic member includes a body, a second elastic arm, and a third elastic arm. The body is connected to the second elastic arm and the third elastic arm, respectively. The second elastic arm is located in the outer circumferential direction of the body, and the third elastic arm is located in the inner circumferential direction of the body. The second elastic arm is connected to the cavity wall of the receiving cavity, and the third elastic arm is connected to the first snap-fit ​​portion.

[0013] In one embodiment of the first aspect, the cavity wall of the receiving cavity is provided with a third snap-fit ​​portion that cooperates with the second elastic arm.

[0014] In one embodiment of the first aspect, the rotating member has a limiting post protruding from one side toward the mounting member, and the winding wheel has a limiting hole adapted to the limiting post at one end near the check member.

[0015] In one embodiment of the first aspect, the limiting post is provided with a first limiting part in the circumferential direction, and the wall of the limiting hole is provided with a second limiting part that cooperates with the first limiting part.

[0016] In one embodiment of the first aspect, one end of the mounting member is provided with a fourth snap-fit ​​portion, and the anti-return member is provided with a fifth snap-fit ​​portion that cooperates with the fourth snap-fit ​​portion.

[0017] In one embodiment of the first aspect, the rotating member is provided with a third limiting portion in the inner circumferential direction at one end facing the mounting member, and the mounting member is provided with a fourth limiting portion in the outer circumferential direction that cooperates with the third limiting portion.

[0018] In one embodiment of the first aspect, the winding wheel includes a winding shaft and discs disposed at both ends of the winding shaft. The diameter of the discs is larger than the diameter of the winding shaft. The winding shaft has a first threading hole and a second threading hole respectively along a direction perpendicular to the axis of the winding shaft. The mounting member has a third threading hole and a fourth threading hole. The third threading hole is disposed corresponding to the first threading hole, and the fourth threading hole is disposed corresponding to the second threading hole.

[0019] In one embodiment of the first aspect, the take-up and unwinding device further includes a base, a sixth engaging portion is provided at the end of the mounting member away from the check member, and the base is provided with a seventh engaging portion that cooperates with the sixth engaging portion.

[0020] Secondly, this application also provides an article having a take-up and release device, including the take-up and release device described in any of the above embodiments.

[0021] The beneficial effects of this application are:

[0022] This application discloses a take-up and unwinding device, which includes a mounting component, a check valve, a winding wheel for winding, an elastic component, and a rotating component. The mounting component has a receiving cavity with openings at both ends; the check valve is connected to one end of the mounting component, and a first elastic arm is provided on the outer periphery of the check valve, with a first check portion provided on the outer periphery edge of the first elastic arm; the winding wheel for winding is rotatably disposed within the receiving cavity, and a first engaging portion is provided on the outer periphery of the end of the winding wheel near the check valve; the elastic component is disposed within the receiving cavity and is connected to both the cavity wall and the first engaging portion; the rotating component has a second engaging portion that mates with the first engaging portion on the side facing the mounting component, and also has a second check portion that mates with the first check portion.

[0023] During use, when tightening the cord, pressing the rotating component engages the second locking part with the first locking part, and the second check valve engages with the first check valve. Then, rotating the rotating component clockwise causes the winding wheel to rotate clockwise, tightening the cord. At this time, the second check valve engages with the first check valve to prevent the cord from loosening due to counter-clockwise rotation of the rotating component and the winding wheel. To loosen the cord, pulling up the rotating component separates the second locking part from the first locking part, and the second check valve from the first check valve, allowing the winding wheel to rotate freely. The user can then pull the cord to loosen it by causing the winding wheel to rotate counter-clockwise. At this time, one end of the elastic element is fixed to the cavity wall, while the other end connects to the first locking part and rotates counter-clockwise with the winding wheel to generate a restoring elastic force.

[0024] If the cord needs to be tightened again, the user first releases the cord. Under the reset force of the elastic element, the winding wheel automatically rotates clockwise to reset, causing the cord to retract automatically and achieving automatic pre-tightening. Then, the user presses the rotating component to engage the second locking part with the first locking part, and the second check part with the first check part. Next, the user rotates the rotating component clockwise to drive the winding wheel to rotate clockwise, thus tightening the cord. This effectively reduces the number of times the user needs to manually rotate the rotating component when tightening the cord again, saving time and effort and improving ease of use and user experience. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A perspective view of the take-up and unwinding device in some embodiments of this application is shown;

[0027] Figure 2 An exploded view of the take-up and unwinding device in some embodiments of this application is shown;

[0028] Figure 3 This paper shows an exploded view of the take-up and unwinding device in some embodiments of this application.

[0029] Figure 4 The following are schematic cross-sectional views of the take-up and unwinding devices in some embodiments of this application;

[0030] Figure 5 A perspective view of the take-up and unwinding device in some embodiments of this application, omitting the rotating component, is shown;

[0031] Figure 6 A perspective view of the take-up and unwinding device in some embodiments of this application is shown, omitting the rotating component and the anti-return component;

[0032] Figure 7 A perspective view of the rotating component is shown in some embodiments of this application;

[0033] Figure 8 A perspective view of the check valve element in some embodiments of this application is shown;

[0034] Figure 9 A perspective view of the elastic element in some embodiments of this application is shown;

[0035] Figure 10 A perspective view of the mounting components in some embodiments of this application is shown;

[0036] Figure 11 A perspective view of the winding reel in some embodiments of this application is shown;

[0037] Figure 12 A perspective view of the base is shown in some embodiments of this application.

[0038] Explanation of key component symbols:

[0039] 100 - Take-up and untake-down device; 110 - Mounting component; 111 - Receiving cavity; 1111 - Third locking part; 112 - Fourth locking part; 113 - Fourth limiting part; 114 - Third threading hole; 115 - Fourth threading hole; 116 - Sixth locking part; 120 - Check valve; 121 - First elastic arm; 1211 - First check valve; 122 - Fifth locking part; 130 - Winding wheel; 131 - First locking part; 132 - Limiting hole; 13 21-Second limiting part; 133-Winding shaft; 1331-First threading hole; 1332-Second threading hole; 134-Disc body; 140-Elastic element; 141-Main body; 142-Second elastic arm; 143-Third elastic arm; 150-Rotating element; 151-Second locking part; 152-Second check valve; 153-Limiting post; 1531-First limiting part; 154-Third limiting part; 160-Base; 161-Seventh locking part. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the template description is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] Example 1

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides a cord winding and unwinding device 100, which is mainly used in daily necessities such as shoes, bags and clothes that have cords that need to be wound and unwound. The cord winding and unwinding device 100 includes a mounting member 110, a check member 120, a winding wheel 130 for winding the cord, an elastic member 140 and a rotating member 150.

[0047] See also Figure 4 , Figure 5 and Figure 6 The mounting member 110 has a receiving cavity 111 with openings at both ends. The check valve 120 is connected to one end of the mounting member 110. A first elastic arm 121 is provided on the outer periphery of the check valve 120, and a first check portion 1211 is provided on the outer periphery of the first elastic arm 121. The winding wheel 130 for winding is rotatably disposed in the receiving cavity 111, and a first engaging portion 131 is provided on the outer periphery of the end of the winding wheel 130 near the check valve 120.

[0048] The elastic member 140 is disposed within the receiving cavity 111 and is connected to the cavity wall of the receiving cavity 111 and the first locking part 131, respectively. The rotating member 150 is provided with a second locking part 151 that cooperates with the first locking part 131 on the side facing the mounting member 110, and is also provided with a second check part 152 that cooperates with the first check part 1211.

[0049] The cable winding and unwinding device 100 provided in the embodiments of this application, when tightening the cable during use, causes the second locking part 151 to engage with the first locking part 131 and the second check part 152 to engage with the first check part 1211 by pressing the rotating member 150. Then, the rotating member 150 is rotated clockwise to drive the winding wheel 130 to rotate clockwise, thereby tightening the cable. At this time, the second check part 152 engages with the first check part 1211 to prevent the cable from loosening due to the counterclockwise rotation of the rotating member 150 and the winding wheel 130. If it is necessary to loosen the cord, the second locking part 151 is separated from the first locking part 131 by pulling up the rotating part 150, and the second check part 152 is separated from the first check part 1211, so that the winding wheel 130 can rotate freely. Thus, the user can loosen the cord by pulling the cord to drive the winding wheel 130 to rotate counterclockwise. At this time, one end of the elastic member 140 is fixed to the cavity wall of the receiving cavity 111, and the other end is connected to the first locking part 131 and rotates counterclockwise with the winding wheel 130 to generate a restoring elastic force.

[0050] If the cord needs to be tightened again, the user first releases the cord. Under the reset force of the elastic element 140, the winding wheel 130 automatically rotates clockwise to reset, so that the cord is automatically retracted, realizing the automatic pre-tightening function of the cord. Then, press the rotating element 150 to make the second locking part 151 engage with the first locking part 131, and the second check part 152 engage with the first check part 1211. Then, rotate the rotating element 150 clockwise to drive the winding wheel 130 to rotate clockwise, thus tightening the cord. This can effectively reduce the number of times the user manually rotates the rotating element 150 when tightening the cord again, saving time and effort, and improving the convenience and user experience.

[0051] For example, the elastic element 140 can be a spring or a torsion spring, the first check part 1211 can be a pawl, the second check part 152 can be a herringbone groove that can engage with the pawl, the first locking part 131 can be a slot, the second locking part 151 can be a locking protrusion that cooperates with the slot, and the second locking part 151 and the rotating element 150 can be integrally formed or connected by a snap-fit.

[0052] like Figure 6 and Figure 9 As shown, in one embodiment of this application, optionally, the elastic member 140 includes a body 141, a second elastic arm 142, and a third elastic arm 143. The body 141 is connected to the second elastic arm 142 and the third elastic arm 143 respectively. The second elastic arm 142 is located in the outer circumferential direction of the body 141, and the third elastic arm 143 is located in the inner circumferential direction of the body 141. The second elastic arm 142 is connected to the cavity wall of the receiving cavity 111, and the third elastic arm 143 is connected to the first snap-fit ​​portion 131.

[0053] In this embodiment, the second elastic arm 142 and the third elastic arm 143 are respectively disposed on the outer circumference and inner circumference of the body 141, and are respectively connected to the cavity wall of the receiving cavity 111 and the first snap-fit ​​portion 131. Thus, during the tightening of the rope, due to the direction of the hook of the third elastic arm 143 and the inherent characteristics of the elastic element 140, the connection between it and the winding wheel 130 will slip; that is, when the winding wheel 130 rotates clockwise synchronously, the elastic element 140 does not generate a restoring force during this process. During the loosening of the rope, the second elastic arm 142 is fixed to the cavity wall of the receiving cavity 111, and the third elastic arm 143 rotates counterclockwise synchronously with the winding wheel 130 to generate a restoring force in the body 141. Therefore, when it is necessary to tighten the rope again, the user first releases the rope, and under the action of the reset spring, the winding wheel 130 is driven to rotate clockwise to reset, so that the rope is automatically retracted, realizing the automatic pre-tightening function of the rope. This effectively reduces the number of times the user manually rotates the rotating part 150 when tightening the rope again, saving time and effort, and improving the convenience and user experience.

[0054] like Figure 6 and Figure 10 As shown in the above embodiments of this application, optionally, the cavity wall of the receiving cavity 111 is provided with a third locking portion 1111 that cooperates with the second elastic arm 142. This achieves the function of fixing the second elastic arm 142 to the cavity wall of the receiving cavity 111. For example, the third locking portion 1111 can be a slot that cooperates with the second elastic arm 142.

[0055] like Figure 4 , Figure 6 and Figure 7 As shown, in one embodiment of this application, optionally, the rotating member 150 is provided with a limiting post 153 protruding from the side facing the mounting member 110, and the winding wheel 130 is provided with a limiting hole 132 that matches the limiting post 153 at one end near the check member 120.

[0056] Specifically, the limiting post 153 is provided with a first limiting part 1531 in the circumferential direction, and the wall of the limiting hole 132 is provided with a second limiting part 1321 that cooperates with the first limiting part 1531.

[0057] In this embodiment, a limiting post 153 with a first limiting part 1531 is provided protruding from the side of the rotating member 150 facing the mounting member 110, and a limiting hole 132 with a second limiting part 1321 is provided at the end of the winding wheel 130 near the check member 120. Under the action of the first limiting part 1531 and the second limiting part 1321, the pressing down and pulling up of the rotating member 150 are limited. During the tightening of the rope, the rotating member 150 is pressed down to make the rotating member 150 lower so that the second locking part 151 locks with the first locking part 131, the second check part 152 locks with the first check part 1211, and the upper surface of the first limiting part 1531 locks with the lower surface of the second limiting part 1321, thereby keeping the second locking part 151 and the first locking part 131, and the second check part 152 and the first check part 1211 stably locked.

[0058] During the process of loosening the rope, the rotating member 150 is pulled up to make the rotating member 150 rise, so that the second locking part 151 is separated from the first locking part 131, the second check part 152 is separated from the first check part 1211, and the lower surface of the first limiting part 1531 is locked and limited by the upper surface of the second limiting part 1321, thereby making the second locking part 151 and the first locking part 131, and the second check part 152 and the first check part 1211 stably maintain a separated state.

[0059] For example, the first limiting part 1531 can be a buckle, and the second limiting part 1321 can be an annular limiting protrusion that cooperates with the buckle.

[0060] like Figure 5 , Figure 8 and Figure 10 As shown, in one embodiment of this application, optionally, one end of the mounting member 110 is provided with a fourth snap-fit ​​portion 112, and the anti-return member 120 is provided with a fifth snap-fit ​​portion 122 that cooperates with the fourth snap-fit ​​portion 112.

[0061] In this embodiment, by providing a fourth locking part 112 at one end of the mounting part 110 and a fifth locking part 122 that cooperates with the fourth locking part 112 on the check member 120, the check member 120 is stably installed, thereby preventing the rotating part 150 and the winding wheel 130 from rotating counterclockwise during the tightening of the rope, thus ensuring the anti-reverse function.

[0062] For example, the fourth latching portion 112 can be a latching protrusion, and the fifth latching portion 122 can be a latching groove that mates with the latching protrusion.

[0063] like Figure 4 , Figure 7 and Figure 10As shown, in one embodiment of this application, optionally, the rotating member 150 is provided with a third limiting part 154 in the inner circumferential direction at one end facing the mounting member 110, and the mounting member 110 is provided with a fourth limiting part 113 in the outer circumferential direction that cooperates with the third limiting part 154.

[0064] In this embodiment, a third limiting part 154 is provided in the inner circumferential direction at one end of the rotating member 150 facing the mounting member 110, and a fourth limiting part 113 that cooperates with the third limiting part 154 is provided in the outer circumferential direction of the mounting member 110, so as to limit the rotating member 150 and prevent the rotating member 150 from falling off the mounting member 110.

[0065] For example, the third limiting part 154 can be a buckle, and the fourth limiting part 113 can be an annular limiting protrusion that cooperates with the buckle.

[0066] like Figure 5 , Figure 10 and Figure 11 As shown, in one embodiment of this application, optionally, the winding wheel 130 includes a winding shaft 133 and a disc 134 disposed at both ends of the winding shaft 133. The diameter of the disc 134 is larger than the diameter of the winding shaft 133. The winding shaft 133 is provided with a first threading hole 1331 and a second threading hole 1332 respectively along a direction perpendicular to the axis of the winding shaft 133. The mounting member 110 is provided with a third threading hole 114 and a fourth threading hole 115. The third threading hole 114 is provided corresponding to the first threading hole 1331, and the fourth threading hole 115 is provided corresponding to the second threading hole 1332.

[0067] In this embodiment, one end of the cord can be passed through the third threading hole 114 and the first threading hole 1331 in sequence and tied in knot within the winding wheel 130. The other end of the cord can be passed through the fourth threading hole 115 and the second threading hole 1332 in sequence and tied in knot within the winding wheel 130.

[0068] Of course, in other embodiments, the cord can also be passed through the first threading hole 1331 and the second threading hole 1332 and fixed in the winding wheel 130 without knotting.

[0069] like Figure 12 As shown, in any of the above embodiments of this application, optionally, the take-up and release device 100 further includes a base 160, a sixth locking part 116 is provided at the end of the mounting member 110 away from the check member 120, and the base 160 is provided with a seventh locking part 161 that cooperates with the sixth locking part 116.

[0070] In this embodiment, a sixth locking portion 116 is provided at the end of the mounting member 110 away from the check member 120, and a seventh locking portion 161 that cooperates with the sixth locking portion 116 is provided on the base 160, so that the mounting member 110 is stably installed on the base 160 under the locking action of the sixth locking portion 116 and the seventh locking portion 161, thereby enabling the entire winding and unwinding device 100 to be installed on clothing, shoes and other items through the base 160.

[0071] For example, the sixth snap-fit ​​portion 116 can be a snap fastener, and the seventh snap-fit ​​portion 161 can be a slot that mates with the snap fastener.

[0072] Example 2

[0073] Embodiments of this application also provide an article having a cord retraction device 100, which includes the cord retraction device 100 described in any of the above embodiments. This article can be clothing or shoes with the cord retraction device 100, or other articles for lacing functions. Specifically, taking underwear as an example, the base 160 of the cord retraction device 100 can be sewn onto the underwear, and the cord passes through the thread hole of the mounting member 110 into the thread hole of the winding wheel 130, thereby tightening or loosening the desired parts of the underwear. Of course, the cord retraction device 100 can also be installed on tops or trousers that require lacing.

[0074] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0075] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A take-up and undo device, characterized in that, include: The mounting component has a receiving cavity with openings at both ends; A check valve is connected to one end of the mounting component. The check valve has a first elastic arm in the outer peripheral direction, and a first check portion is provided at the outer peripheral edge of the first elastic arm. A winding wheel for winding is rotatably disposed in the receiving cavity about an axial direction, and a first snap-fit ​​portion is provided on the outer circumference of one end of the winding wheel near the anti-return element. An elastic element is disposed within the receiving cavity and is connected to the cavity wall of the receiving cavity and the first snap-fit ​​portion, respectively. The rotating component has a second snap-fit ​​portion that mates with the first snap-fit ​​portion on the side facing the mounting component, and a second check-back portion that mates with the first check-back portion. The elastic element includes a body, a second elastic arm, and a third elastic arm. The body is connected to the second elastic arm and the third elastic arm respectively. The second elastic arm is located in the outer circumferential direction of the body, and the third elastic arm is located in the inner circumferential direction of the body. The second elastic arm is connected to the cavity wall of the receiving cavity, and the third elastic arm is connected to the first snap-fit ​​portion. The third elastic arm is provided with a hook portion. From the perspective of the rotating component toward the mounting component, the hook portion is bent and extended in a counterclockwise direction and is movably connected to the first snap-fit ​​portion. During the tightening of the cord, the winding wheel rotates clockwise. Since the hook part is bent and extended counterclockwise, the hook part is slidably connected to the first locking part, and the elastic element does not generate a restoring force. During the unwinding process, the winding wheel rotates counterclockwise. Because the hook portion is bent and extended counterclockwise, it engages with the first engaging portion. The third elastic arm rotates counterclockwise synchronously with the winding wheel, and the second elastic arm is connected to the cavity wall of the receiving cavity, so that the elastic element generates a restoring force.

2. The take-up and unwinding device according to claim 1, characterized in that, The cavity wall of the receiving cavity is provided with a third snap-fit ​​portion that cooperates with the second elastic arm.

3. The take-up and unwinding device according to claim 1, characterized in that, The rotating component has a limit post protruding from one side toward the mounting component, and the winding wheel has a limit hole at one end near the check valve that matches the limit post.

4. The take-up and unwinding device according to claim 3, characterized in that, The limiting post is provided with a first limiting part in its circumference, and the wall of the limiting hole is provided with a second limiting part that cooperates with the first limiting part.

5. The take-up and unwinding device according to claim 1, characterized in that, One end of the mounting component is provided with a fourth snap-fit ​​portion, and the anti-return component is provided with a fifth snap-fit ​​portion that cooperates with the fourth snap-fit ​​portion.

6. The take-up and unwinding device according to claim 1, characterized in that, The rotating component has a third limiting part in the inner circumferential direction at one end facing the mounting component, and the mounting component has a fourth limiting part in the outer circumferential direction that cooperates with the third limiting part.

7. The take-up and unwinding device according to claim 1, characterized in that, The winding wheel includes a winding shaft and discs disposed at both ends of the winding shaft. The diameter of the discs is larger than the diameter of the winding shaft. The winding shaft has a first threading hole and a second threading hole respectively along a direction perpendicular to the axis of the winding shaft. The mounting component has a third threading hole and a fourth threading hole. The third threading hole is disposed corresponding to the first threading hole, and the fourth threading hole is disposed corresponding to the second threading hole.

8. The take-up and unwinding device according to any one of claims 1 to 7, characterized in that, The take-up and unwinding device also includes a base, and a sixth locking part is provided at the end of the mounting member away from the check member. The base is provided with a seventh locking part that cooperates with the sixth locking part.

9. An article having a cord reeling / unwinding device, characterized in that, The take-up and unwinding device includes any one of claims 1 to 8.

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