WO2016114568A1

WO2016114568A1 - String winding and unwinding apparatus

Info

Publication number: WO2016114568A1
Application number: PCT/KR2016/000321
Authority: WO
Inventors: 김석환
Original assignee: 스피어다인 주식회사; 김석환
Priority date: 2015-01-14
Filing date: 2016-01-13
Publication date: 2016-07-21
Also published as: KR101572605B1

Abstract

The present invention provides a string winding and unwinding apparatus of which the configuration is simplified and the maintenance is easy, the apparatus comprising: (i) a base unit having a base plate and a cylindrical lower housing positioned on the upper surface of the base plate; (ii) a middle unit having a cylindrical upper housing and upper and lower stopping portions which are positioned on the inner side of the upper housing; (iii) a rotating unit at least a portion of which is positioned inside the lower housing so as to be rotatable with respect to the base unit; and (iv) a cover unit which is coupled to the middle unit so as to be rotatable with respect to the middle unit, has a counter stopping portion, can be interlocked with or separated from the rotating unit by having a variable distance from the base unit, and can rotate with the rotating unit when interlocked with the rotating unit.

Description

String winding and unwinding device

The present invention relates to a string winding and unwinding device, and more particularly, to a string winding and unwinding device which is simple in construction and easy to maintain.

Shoes, bags, backpacks, clothing, etc. are generally provided with tightening / unlocking means using strings or the like. For example, in the case of shoes, strings are mounted so as to be connected in a zigzag form, and by pulling and tightening the strings, the shoes may be closely attached to the foot of the user.

However, it is very cumbersome to loosen or tighten the strings every time you wear or remove the shoes, so it is common to wear shoes without pulling the strings properly so that the shoes do not come into close contact with the user's feet. In this case, when the shoe is to be in close contact with the user's foot for exercise, etc., the string is pulled back and tightened, and then the string is loosened again to loosen the user. In addition, there is a problem in that the inconvenience of having to bundle the string again when the string is unbundled during walking or exercise.

The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide a string winding and unwinding device which is simple in construction and easy to maintain. However, these problems are exemplary, and the scope of the present invention is not limited thereby.

According to one aspect of the invention, (i) the base unit, the base unit having a cylindrical lower housing located on the upper surface of the base plate and having a side through hole, and (ii) a cylindrical shape coupled to the lower housing A middle unit having an upper housing of the upper housing, an upper locking portion located inside the upper housing, and a lower locking portion located inside the upper housing but closer to the base plate than the upper locking portion, (iii) A rotating unit at least partially located inside the lower housing so as to be rotatable with respect to the base unit, wherein the string can be wound around the outer circumferential surface or unwound from the outer circumferential surface by rotation, and (iv) rotatable relative to the middle unit It is coupled to the middle unit, has a corresponding catching portion projecting in the radial direction, the upper catching portion and the lower catching portion of the corresponding catching portion According to the relative position of the distance from the base unit is variable to be engaged with the rotating unit or spaced apart from the rotating unit, when engaged with the rotating unit is provided with a cover unit, which can rotate with the rotating unit A string winding and unwinding device is provided.

The upper locking portion and the lower locking portion may be located in the upper housing.

The middle unit further includes a locking support portion extending inwardly and bent from the upper housing so that a space exists between the inner circumferential surface of the upper housing, and the upper locking portion and the lower locking portion are connected to the locking support portion. It may be located on a surface in a direction away from the upper housing.

The middle unit further includes a locking support portion extending inward from the upper housing and bent a plurality of times so that a space exists between the inner circumferential surface of the upper housing, and the locking support portion is located in a direction away from the upper housing. The convex portions may be bent a plurality of times so that at least two convex portions exist, and the upper locking portion and the lower locking portion may be convex portions of the locking support portion.

The middle unit is further provided with a flexure, which is coupled to the upper housing and bent a plurality of times so that there is a space between the inner side of the upper housing and the inner peripheral surface of the upper housing, the flexure is the The convex portions may be bent a plurality of times so that at least two convex portions exist in a direction away from the upper housing, and the upper catching portion and the lower catching portion may be convex portions of the flexure.

The upper locking portion and the lower locking portion have a convex shape in a direction away from the inner circumferential surface of the upper housing, and the corresponding locking portion is located in a first space below the lower locking portion or between the upper locking portion and the lower locking portion. The distance from the base unit of the cover unit may be varied according to the position of the second space, and when the corresponding catching portion is located in the first space, the cover unit may rotate with the rotation unit in engagement with the rotation unit. When the corresponding engaging portion is located in the second space, it may be spaced apart from the rotating unit.

In this case, the distance between the second portion and the base plate far from the upper housing of the upper locking portion may be shorter than the distance between the first portion adjacent to the upper housing and the base housing.

On the other hand, the upper locking portion and the lower locking portion may have a concave shape.

At least some of the corresponding catches may be flexible.

The cover unit may have a central axis having a groove formed on an outer surface thereof, and the corresponding catching portion may be fitted into the groove of the central axis.

The cover unit may have a one-way ratchet protrusion, and the middle unit may have a corresponding protrusion that may engage with the ratchet protrusion therein.

When the cover unit is engaged with the rotating unit, the ratchet protrusion and the corresponding protrusion may be engaged with each other, and when the cover unit is spaced apart from the rotating unit, the ratchet protrusion and the corresponding protrusion may be spaced apart from each other.

The middle unit may be located closer to the base plate than the lower locking portion and has a partition wall protruding therein, and the corresponding protrusion may be located on a surface in the direction of the lower locking portion of the partition wall.

The middle unit may be located closer to the base plate than the lower locking portion and has a partition wall protruding therein, and the corresponding projection may be located on an inner side surface of the partition wall in the center direction of the upper housing.

The base unit may further include a clip portion corresponding to the base plate and extending from the base plate so that a space exists between the base plate and the base plate.

The base unit may further include a rail positioned on a lower surface of the base plate and extending in one direction.

According to one embodiment of the present invention made as described above, it is possible to implement a string winding and unwinding device that is easy to maintain while simplifying the configuration. Of course, the scope of the present invention is not limited by these effects.

1 is an exploded perspective view schematically showing a string winding and unwinding device according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing the coupled state of the string winding and unwinding device of FIG. 1.

3 is a perspective view schematically illustrating the base unit of FIG. 1.

4 is a perspective view schematically illustrating the middle unit of FIG. 1.

5 is a perspective view schematically showing the rotating unit of FIG.

6 is a bottom perspective view schematically illustrating the rotating unit of FIG. 5.

7 is a bottom perspective view schematically illustrating the cover unit of FIG. 1.

8 is a cross-sectional view of a portion of the string winding and unwinding device of FIG. 1.

9 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention.

10 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention.

11 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention.

12 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention.

13 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention.

14 is a perspective view schematically showing a middle unit of a string winding and unwinding device according to another embodiment of the present invention.

15 is a cross-sectional view of a portion of a cover unit that may be used with the middle unit of FIG. 14.

16 is a perspective view schematically showing a shoe according to another embodiment of the present invention.

17 is a perspective view schematically showing a string winding and unwinding device according to another embodiment of the present invention.

18 is a perspective view schematically showing a string winding and unwinding device according to another embodiment of the present invention.

FIG. 19 is a perspective view schematically showing a fastening clip that may be combined with the string winding and unwinding device of FIG. 18.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms, and the following embodiments are intended to complete the disclosure of the present invention, the scope of the invention to those skilled in the art It is provided to inform you completely. In addition, the components may be exaggerated or reduced in size in the drawings for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

In the following embodiments, the x-axis, y-axis and z-axis are not limited to three axes on the Cartesian coordinate system, but may be interpreted in a broad sense including the same. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

On the other hand, when various components such as layers, films, regions, plates, etc. are "on" other components, this is not only when other components are "directly on" but also when other components are interposed therebetween. Include.

1 is an exploded perspective view schematically illustrating a string winding and unwinding device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view schematically illustrating a combined state of the string winding and unwinding device of FIG. 1.

As shown in Figure 1 and 2, the string winding and unwinding apparatus according to the present embodiment is the base unit 100, the middle unit 200 is coupled to the base unit, the base unit rotatable relative to the base unit 100 A rotating unit 300 located in the unit 100 and / or the middle unit 200, and a cover unit 400 coupled to the middle unit 200 so as to be rotatable with respect to the middle unit 200.

3 is a perspective view schematically illustrating the base unit 100 of FIG. 1. As shown in FIG. 3, the base unit 100 includes, for example, a base plate 110 having a shape such as a disc and a lower housing 120 having a cylindrical shape. Of course, the shape of the base plate 110 is not limited to the original plate, it may have a plate shape of various shapes. And here the cylinder shape can be understood as a shape similar to the hollow cylinder. The lower housing 120 is located on the upper surface (+ z direction) of the base plate 110. The base plate 110 and the lower housing 120 may be formed integrally with a resin or the like.

The lower housing 120 has a second side through hole 122. Of course, the lower housing 120 may also have a first side through hole 121 as shown in FIG. 3. In this case, the first side through hole 121 may be located closer to the base unit 100 than the second side through hole 122. The lower housing 120 may have two first side through holes 121 so as to face each other, and may also have two second side through holes 122. In FIG. 3, the first side through holes 121 are positioned on a straight line in the y axis direction, and the second side through holes 122 are also located on a straight line in the y axis direction, but this is only an example and is approximately a straight line. It can also function when aligned on the phase. Meanwhile, although FIG. 3 illustrates that the first side through hole 121 and the second side through hole 122 are positioned side by side up and down, the present invention is not limited thereto. For example, the first side through holes 121 are positioned on a straight line in the y-axis direction as shown in FIG. 3, and the second side through holes 122 are positioned on a straight line in the x-axis direction, as shown in FIG. 3. You can also do that.

Through holes 111 having a central axis in the z-axis direction may be formed at an outer portion of the lower housing 120 of the base plate 110 of the base unit 100. The through holes 111 are intended to allow the fasteners for allowing the base plate 110 to be fixed to the shoes when the string winding and unwinding device according to the present embodiment is mounted on the shoes, for example.

On the other hand, the base unit 100 may further have a rotation support 130 protruding from the inner surface of the lower housing 120 toward the center of the lower housing 120. On the upper surface of the rotary support 130 may also be formed a rotary support protrusion 132 protruding upward (in the + z direction). The rotation support 130 and the rotation support protrusion 132 may serve to smoothly rotate the rotation unit 300 to be described later when the rotation unit 300 is rotated with respect to the base unit 100. This will be described later.

As described above, the middle unit 200 to be described later may be coupled to the base unit 100. For this purpose, for example, the outer surface of the lower housing 120 of the base unit 100 as illustrated in FIGS. At least a portion of the threads may be formed. At least a portion of the inner surface of the middle unit 200 is formed with a screw bone corresponding to the screw thread, the middle unit 200 and the base unit 100 may be screwed. In addition, as described below, in order to wind the string of shoes or the like on the outer circumferential surface of the rotating unit 300, the cover unit 400 engaged with the rotating unit 300 is rotated, and the middle unit screwed in this process ( It is necessary to prevent the 200 and the base unit 100 from being separated. Therefore, in order to rotate the cover unit 400 engaged with the rotating unit 300 in one direction to wind the string of shoes or the like on the outer circumferential surface of the rotating unit 300, one direction is the middle unit 200 and the base. It is preferable that the screwing of the unit 100 is in the locking direction, not the loosening direction. Of course, this is just an example, the middle unit 200 and the base unit 100 may be coupled to each other by fitting using a protrusion or the like, of course, various modifications are possible.

As shown in FIG. 4, the middle unit 200 has a cylindrical upper housing 210, an upper locking portion 221, and a lower locking portion 222. The upper catching portion 221 and / or the lower catching portion 222 may have some elasticity or flexibility within a range in which its overall shape does not change significantly. The upper housing 210 having a cylindrical shape, which can be understood as a hollow cylinder-like shape, may be coupled to the lower housing 120 of the base unit 100. Both the upper locking portion 221 and the lower locking portion 222 may be located on the inner circumferential surface 210a of the upper housing 210, which is the central direction of the upper housing 210. In particular, the upper locking portion 221 and the lower locking portion 222 may both have a convex shape in a direction away from the inner peripheral surface (210a) of the upper housing (210). That is, both the upper locking portion 221 and the lower locking portion 222 may have a convex shape protruding toward the center of the upper housing 210. In this case, the lower locking portion 222 is located closer to the base plate 110 (in the -z direction) than the upper locking portion 221.

The middle unit 200 may also have a partition wall 240, if necessary, the partition wall 240 is located closer to the base plate 110 than the lower locking portion 222 and inside the upper housing 210. It may have a protruding shape. The corresponding protrusion 250 may be located on the surface of the barrier 240 in the direction of the lower locking portion 222 (+ z direction). The function of the partition wall 240 and / or the corresponding protrusion 250 will be described later.

The upper housing 210, the upper locking portion 221, the lower locking portion 222, the partition 240, and the corresponding protrusion 250 may be integrally formed of a resin or the like. Of course, as described below, some components may be coupled to the upper housing 210 as separate components separated from the upper housing 210 and the like, and in this case, some components may be formed of resin or metal. .

5 is a perspective view schematically showing the rotating unit 300 of FIG. 1, and FIG. 6 is a bottom perspective view schematically showing the rotating unit 300 of FIG. 5. The rotating unit 300 is located inside the lower housing 120 of the base unit 100 as shown in FIGS. 5 and 6, and is disposed to be rotatable with respect to the base unit 100. Here, the rotation unit 300 located in the lower housing 120 means that at least a part of the rotation unit 300 is located in the lower housing 120, and a portion of the rotation unit 300 is located in the lower housing 120. Various modifications are possible, such as may be located in the upper housing 210 of the upper).

The rotating unit 300 has a first engagement portion 310 on the upper surface (+ z direction) as shown in FIG. In FIG. 5, although the first engagement portion 310 is illustrated as having a concave groove shape, the first engagement portion 310 may have a convex protrusion shape. When the first engagement portion 310 is engaged with the second engagement portion 450 of the cover unit 400, which will be described later, the rotation unit 300 may be rotated together with the cover unit 400. At this time, in order to prevent the rotary unit 300 and the cover unit 400 from running against each other despite the first engagement portion 310 and the second engagement portion 450 engaged with each other, the first engagement portion The shape of the 310 and the second engagement portion 450 in the xy plane may have various shapes such as polygons, ellipses or asymmetrically distorted circles. Alternatively, the shape of the first engagement portion 310 and the second engagement portion 450 in the xy plane may be configured as at least one pair of pins and pinholes so that the pair of pins and pinholes engage to rotate the unit 300. And the cover unit 400 may be engaged with each other.

The rotary unit 300 is located in the upper portion as shown in Figures 5 and 6, the first blade portion 321 protruding in the radial direction and the base plate 110 than the first blade portion 321 It may have a lower wing (in the -z direction) and a second wing portion 322 protruding in a radial direction similar to the first wing portion 321 closer to the. The string may be wound around the outer circumferential surface of the rotating unit 300 in the space between the first wing 321 and the second wing 322 according to the rotation direction of the rotating unit 300. That is, the first wing 321 and the second wing 322 may serve to define a space in which the wound string is to be located when the string is wound according to the rotation direction of the rotation unit 300.

On the other hand, the rotation unit 300 is located in the lower portion (in the -z direction) to be closer to the base plate 110 than the second blade portion 322 as shown in Figure 6 as needed and the second blade portion ( Similarly to 322, it may further have a third wing portion 323 protruding in the radial direction. In addition, when the lower surface of the third wing portion 323 is flat, at least a portion of the lower surface of the third wing portion 323 contacts the upper surface of the base plate 110 of the base unit 100 (+ z direction). Or, even if not in contact with the rotating unit 300 in a state close to the base plate 110 can be stably rotated.

As shown in FIG. 6, the rotation unit 300 may have a first through hole 331 positioned below the second wing 322 (-z direction) and penetrating the rotation unit 300. The first through hole 331 may correspond to the first side through holes 121 of the base unit 100. Here, the first through hole 331 corresponds to the first side through holes 121, that is, the height of the first through hole 331 from the base plate 110 and the first through hole from the base plate 110. It means that the height of the 121 is approximately the same.

An elastic body (not shown) such as a restoring string having elasticity may pass through the first through hole 331 of the rotating unit 300, and both ends of the elastic body may pass through the first side through holes 121. It may be fixed to the base unit 100. For example, both ends of the restoring string may be tied to each other outside the base unit 100. As such, the restoration string may be fixed to the base unit 100 through various methods by passing through the first through hole 331 of the rotation unit 300. Accordingly, when the rotating unit 300 is engaged in the cover unit 400 and rotated in one direction so that a string such as a shoe is wound on the outer circumferential surface of the rotating unit 300, the restoration unit having elasticity also increases its length while the rotating unit is extended. It is wound up at 300. Specifically, the restoration string may be wound in a space between the second wing 322 and the third wing 323. In such a state, when the rotary unit 300 is spaced apart from the cover unit 400, the rotary unit 300 by the elasticity to be restored of the restoring string is increased in length and has a restoring force in the other direction of the other direction Direction can be automatically rotated. Of course, the elastic body may be any object having elasticity in addition to the restoring string. For example, an elastic string such as a tension spring, a spring, and a rubber band may be used.

1 and 3 illustrate that the base unit 100 has first side through holes 121, but the present invention is not limited thereto. For example, the base unit 100 may have a groove or a protrusion therein without having the first side through holes 121, and both ends of the elastic body such as a restoration string may be formed in the groove or the protrusion inside the base unit 100. It may be fixed. In addition, one end of the restoring string is fixed to a groove or a protrusion inside the base unit 100, and the other end thereof is fixed to a portion of the rotating unit 300, for example, a groove or a protrusion (not shown) of the third wing 323. May be

The rotating unit 300 may have a second through hole 332 penetrating the rotating unit 300 in the space between the first wing portion 321 and the second wing portion 322 as shown in FIG. have. The second through hole 332 may correspond to the second side through holes 122 of the base unit 100. Here, the second through hole 332 corresponds to the second side through holes 122, that is, the height of the second through hole 332 from the base plate 110 and the second side through hole from the base plate 110. It means that the heights of the 122 are approximately the same.

The string of shoes or the like passes through any one of the second side through holes 122 of the base unit 100 and passes through the second through hole 332 of the rotating unit 300, and then again. It may pass through the other one of the two side through-holes (122). Accordingly, when the rotating unit 300 is rotated in one direction by engaging the cover unit 400, the string is wound around the rotating unit 300. Specifically, the string is wound in the space between the first wing 321 and the second wing 322 of the rotating unit 300. Through this, the winding of the string such as shoes can be made. At this time, the ratchet protrusion 460 and the corresponding protrusion 250 also meet each other, but the wedge shape of the ratchet protrusion 460 and the corresponding protrusion 250 permits the rotation in the one direction of the cover unit 400 and covers the cover. When the rotation of the unit 400 stops in the one direction, the rotation of the cover unit 400 and the rotation unit 300 in the other direction in the opposite direction from the position is restricted. Of course, if the rotating unit 300 is spaced apart from the cover unit 400 in such a state, the ratchet protrusion 460 and the corresponding protrusion 250 are also spaced apart, so that the rotating unit 300 is used for restoring force of an elastic body such as a restoring string. It can be rotated in the other direction of the opposite direction of the one direction, thereby allowing the string that was wound on the rotary unit 300 can be unwound from the outer peripheral surface of the rotary unit 300.

Of course, the present invention is not limited thereto, and the rotation unit 300 may not have the second through hole 332. In this case, one end of the string such as shoes passes through any one of the second side through holes 122 of the base unit 100 and is fixed to the rotating unit 300, and the other end of the string such as shoes is the base unit 100 It may be to be fixed to the rotating unit 300 by passing through the other one of the second side through hole (122) of. In this case, for fixing one end and the other end of the string, the rotary unit 300 may have at least one fixing protrusion for fixing the string.

When the rotating unit 300 is rotated relative to the base unit 100 when rotating, it is preferable to increase the rotational stability of the rotating unit 300. To this end, the rotation support unit 130 and the rotation support protrusion 132 of the base unit 100 may interact with the second wing unit 322 of the rotation unit 300. For example, the rotary unit 300 has a rotary protrusion 322a protruding downwardly (-z direction) at the radial end of the second blade portion 322, and below the second blade portion 322 (-z direction). A portion of the surface adjacent to the rotation protrusion 322a is adjacent to the rotation support protrusion 132 of the base unit 100 or contacts the rotation support protrusion 132, so that the rotation unit 300 rotates when the rotation unit 300 ( The position of the central axis of rotation of 300 may be constant without moving relative to the base unit 100.

The rotary unit 300 may be formed of a resin and / or metal.

7 is a bottom perspective view schematically illustrating the cover unit 400 of FIG. 1. As shown in FIG. 7, the cover unit 400 may be coupled to the middle unit 200 to be rotatable with respect to the middle unit 200. Of course, when the cover unit 400 is engaged with the rotating unit 300 as described above, the cover unit 400 may rotate in one direction together with the rotating unit 300.

The cover unit 400 has a corresponding catching portion 410 protruding in the radial direction. The corresponding catching portion 410 of the cover unit 400 grips the upper catching portion 221 and / or the lower catching portion 222 of the middle unit 200 so that the cover unit 400 is the middle unit. And may be rotatably coupled relative to 200. In addition, according to the relative position between the upper engaging portion 221 and the lower engaging portion 222 of the corresponding engaging portion 410, the cover unit 400 is the distance from the base unit 100 is variable and the rotating unit 300 It may be engaged or spaced apart from the rotating unit (300).

Specifically, as the corresponding engaging portion 410 is located in the first space below the lower locking portion 222 or in the second space between the upper locking portion 221 and the lower locking portion 222, the cover unit ( The distance from the base unit 100 of 400 may vary. When the corresponding catching portion 410 is located in the first space, the cover unit 400 may be engaged with the rotating unit 300 to be rotated in one direction together with the rotating unit 300, and the corresponding catching portion 410 may be provided. Is positioned in the second space, the ratchet protrusion 460 and the corresponding protrusion 250 are spaced apart as the cover unit 400 is spaced apart from the rotating unit 300, and the rotating unit 300 is covered with the cover unit 400. Irrespective of the movement of the can be rotated in the other direction, the one direction or the opposite direction.

As shown in FIG. 7, the cover unit 400 has a second engagement portion 450 on the bottom surface of the rotation unit 300 direction (-z direction). In FIG. 7, the second engagement portion 450 is shown to have a convex protrusion shape, but may be a concave groove shape, and may be deformed according to the shape of the first engagement portion 310 of the rotating unit 300. to be. When the second engagement portion 450 is engaged with the first engagement portion 310 of the rotation unit 300 described above, the rotation unit 300 may be rotated together with the cover unit 400. At this time, in order to prevent the rotary unit 300 and the cover unit 400 from running against each other despite the first engagement portion 310 and the second engagement portion 450 engaged with each other, the first engagement portion The shape of the 310 and the second engagement portion 450 in the xy plane may have various shapes such as polygons, ellipses, or asymmetrically distorted circles, and may have a configuration of pins and pinholes.

Meanwhile, the cover unit 400 has a central axis 430 as shown in FIG. 7, and the corresponding catching portion 410 is understood to be an end portion of a disk shape extending radially from the central axis 430. May be The cover plate 420 may be positioned above the central axis 430 (+ z direction). Side plate 440, which can be understood as a portion bent at an approximately 90 degree angle of the edge of the cover plate 420, as shown in Figure 2 when the cover unit 400 is coupled to the middle unit 200 It may cover at least a portion of the outer peripheral portion of the middle unit 200. In FIG. 2, the side plate 440 covers most of the outer circumferential surface of the upper housing 210 of the middle unit 200.

Various components of the cover unit 400 may be integrally formed of resin, metal, or the like. Of course, as described below, some components may be coupled to the central axis 430 as a separate component separated from the central axis 430 and the like, in which case such some components may be formed of a resin or a metal. .

In the case of the string winding and unwinding device according to the present embodiment as described above, when the corresponding catching portion 410 is located in the first space below the lower catching portion 222, the cover unit 400 is a rotating unit In conjunction with the 300 can be rotated in one direction with the rotary unit 300, thereby allowing the string to be wound on the outer peripheral surface of the rotary unit (300). And when the corresponding catching portion 410 is located in the second space between the upper catching portion 221 and the lower catching portion 222, as the cover unit 400 is spaced apart from the rotating unit 300, the rotating unit 300 ) May be rotated in the other direction, that is, the unwinding direction, in the opposite direction to one direction, regardless of the movement of the cover unit 400, thereby allowing the string wound on the outer circumferential surface of the rotating unit 300 to be unwound. That is, the winding and unwinding of the string may be easily performed according to a relative position between the corresponding catching portion 410 of the cover unit 400 and the upper catching portion 221 and the lower catching portion 222 of the middle unit 200. Can be.

On the other hand, in order for the user to select the winding and unwinding of the string, the user is relative to the corresponding engaging portion 410 of the cover unit 400 and the upper engaging portion 221 and the lower engaging portion 222 of the middle unit 200. You need to control the position. That is, the user has a second space between the upper locking portion 221 and the lower locking portion 222 in a state where the corresponding locking portion 410 of the cover unit 400 is located in the first space below the lower locking portion 222. Or the corresponding catching part 410 is located in a first space below the lower catching part 222 while the corresponding catching part 410 is located in a second space between the upper catching part 221 and the lower catching part 222. There is a need. In this manipulation process, an impact may be applied to the upper locking portion 221 and / or the lower locking portion 222 of the middle unit 200, and accordingly, the upper locking portion 221 of the middle unit 200 may be repeatedly used. ) And / or lower locking portion 222 may be damaged.

However, in the case of the string winding and unwinding apparatus according to the present embodiment, when the upper catching portion 221 and / or the lower catching portion 222 of the middle unit 200 is damaged, the base unit 100 and the rotating unit 300 are damaged. And since the cover unit 400 only needs to replace the middle unit 200 while remaining intact, it is possible to facilitate the maintenance and proceed quickly. In addition, in the winding and unwinding device according to the present embodiment, maintenance is performed by simply replacing a screw-fitted part or inserting a unit to be replaced, without using special expertise or a specific tool for maintenance. This has the advantage that users can easily use the maintenance directly.

If the middle unit 200 is integral with the base unit 100, all of the components must be replaced when the upper locking portion 221 and / or the lower locking portion 222 is damaged. In this case, since all the components connected to the strings such as shoes and the rotation unit 300 are separated from the strings such as shoes, the maintenance is very difficult and takes a long time even if the maintenance is in progress. Will not be.

Meanwhile, in the winding and unwinding device according to the present embodiment, a slippery film is formed on the surfaces of the upper catching portion 221 and / or the lower catching portion 222 and / or the corresponding catching portion 410, or elastic and / or By making it flexible, it is possible to reduce the possibility of breakage by friction in the use process.

Of course, in the above-described steering process, the impact may be applied to the corresponding catching portion 410 of the cover unit 400, not the upper catching portion 221 and / or the lower catching portion 222 of the middle unit 200. Therefore, the corresponding catching portion 410 of the cover unit 400 may be damaged according to repeated use.

However, in the case of the string winding and unwinding device according to the present embodiment, when the corresponding catching portion 410 of the cover unit 400 is damaged, the base unit 100, the middle unit 200 and the rotating unit 300 are left as they are. Since only the cover unit 400 needs to be replaced, maintenance can be easily and quickly performed. If the cover unit 400 is integral with the rotating unit 300, all the components must be replaced when the corresponding catching part 410 is damaged, and in this case, the one connected to the string such as shoes Since the operation of separating the components and the base unit 100 and the like and the string of shoes, etc. will be accompanied, the maintenance is very difficult and even if the maintenance is going to take a long time.

8 is a cross-sectional view of a portion of the string winding and unwinding device of FIG. 1. Similarly, in FIG. 2, which is a cross-sectional view of the string winding and unwinding apparatus of FIG. 1, the corresponding catching portion 410 is located in the first space below the lower catching portion 222 so that the cover unit 400 rotates. And a state in which the cover unit 400 and the rotation unit 300 are wound by rotation in one direction. In the case of FIG. 8, the corresponding catching part 410 is located in the second space between the upper catching part 221 and the lower catching part 222 so that the cover unit 400 is spaced apart from the rotating unit 300. The rotation unit 300 shows a state in which the unwinding of the string is possible as the cover unit 400 rotates in the other direction, which is opposite to one direction, regardless of the cover unit 400.

As shown in FIG. 8, the upper housing 210 of the upper locking portion 221 is disposed rather than the distance d1 between the first portion adjacent to the upper housing 210 of the upper locking portion 221 and the base plate 110. The distance d2 between the second portion (the end portion in the direction of the center axis 430) and the base plate 110 far from) may be shorter.

As described above, in order for the user to select the winding and unwinding of the string, the user may engage the corresponding catching portion 410 of the cover unit 400 and the upper catching portion 221 and the lower catching portion 222 of the middle unit 200. It is necessary to control the relative position of wah. When the user manipulates the corresponding catching part 410 to be positioned in the first space below the lower catching part 222 while the corresponding catching part 410 is located in the second space between the upper catching part 221 and the lower catching part 222. Press the cover unit 400 in the direction of the base unit 100. On the contrary, the corresponding catching portion 410 of the cover unit 400 is located in the second space between the upper catching portion 221 and the lower catching portion 222 while being located in the first space below the lower catching portion 222. When the user steers, the user pulls the cover unit 400 in a direction away from the base unit 100 (+ z direction). In order to prevent the cover unit 400 from being separated from the middle unit 200 in this process, as shown in FIG. 8, the first portion and the base plate adjacent to the upper housing 210 of the upper locking portion 221 ( The distance d2 between the base portion 110 and the second portion (end portion in the direction of the center axis 430) far from the upper housing 210 of the upper locking portion 221 is greater than the distance d1 between the portions 110. You can make it shorter. For example, the upper locking portion 221 has a sagging shape toward the base plate 110 so that the closer to the base plate 110 as the distance away from the inner peripheral surface (210a) of the upper housing 210. Can be. Of course, the present invention is not limited thereto, and the upper locking part 221 may have a shape that does not sag in the direction of the base plate 110.

On the other hand, when the user is controlled to be located in the first space below the lower locking portion 222 in a state where the corresponding locking portion 410 is located in the second space between the upper locking portion 221 and the lower locking portion 222. The user may press the cover unit 400 in the direction of the base unit 100. If necessary, it may be necessary to prevent the cover unit 400 from moving excessively in the direction of the base unit 100. This may be implemented by using the partition wall 240 of the middle unit 200.

As described above, the partition wall 240 may be located closer to the base plate 110 than the lower locking portion 222 and may have a shape protruding from the upper housing 210 in an inner direction (direction of the center axis 430). . When the corresponding catching portion 410 of the cover unit 400 is located in the space below the lower catching portion 222, excessive movement of the corresponding catching portion 410 in the direction of the base unit 100 is such a partition wall 240. Can be effectively prevented.

On the other hand, when the corresponding catching part 410 is located in the first space below the lower catching part 222, the cover unit 400 is engaged with the rotating unit 300, in this case, the cover unit 400 and the rotating unit The 300 may rotate only in one predetermined direction by the action of the ratchet protrusion 460 and the corresponding protrusion 250. This is because when the rotating unit 300 rotates in the other direction irrespective of the user's intention, the string wound on the rotating unit 300 may be unwound regardless of the user's intention.

As described above, the corresponding protrusion 250 may be located on a surface of the lower wall 222 in the direction (+ z direction) of the partition wall 240. In this case, the cover unit 400 has a one-way ratchet protrusion 460 (see FIG. 7), and when the corresponding catching portion 410 is positioned in the first space below the lower catching portion 222, the corresponding protrusion ( 250 may be engaged with ratchet protrusion 460. As such, when the corresponding protrusion 250 is engaged with the ratchet protrusion 460, the cover unit 400 may rotate only in one direction predetermined with respect to the middle unit 200, thereby engaging the cover unit 400. The rotating unit 300 may also rotate only in one predetermined direction.

In the case of the corresponding protrusion 250 having the shape shown in FIG. 4 and the ratchet protrusion 460 having the shape shown in FIG. 7, the corresponding catching part 410 has a first space below the lower catching part 222. When the user looks at the cover unit 400 in the -z direction, the cover unit 400 may be rotated only in a clockwise direction (ie, a winding direction). Of course, when the corresponding catching portion 410 is located in the second space between the upper catching portion 221 and the lower catching portion 222 as shown in FIG. 8, the corresponding protrusion 250 is the ratchet protrusion 460. Can be spaced apart.

9 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention. As shown in FIG. 9, in the case of the string winding and unwinding apparatus according to the present embodiment, the middle unit 200 may have a locking support 230.

The locking support 230 extends inwardly (in the direction of the center axis 430) from the upper housing 210 so that a space exists between the locking support 230 and the inner circumferential surface 210a of the upper housing 210. It may have a bent shape. In detail, the locking support part 230 may include a first part 231 extending inwardly from the upper housing 210 and a second part 233 extending in a direction intersecting with the first part 231 (-z direction). And, it may have a bent portion 232 between the first portion 231 and the second portion 233. Accordingly, a space may exist between the second portion 233 of the locking support 230 and the inner circumferential surface 210a of the upper housing 210. Of course, the locking support 230 may be integrated with the upper housing 210 as shown in FIG. 9. In addition, the upper locking portion 221 and the lower locking portion 222 may be located on a surface in a direction (center axis 430 direction) away from the upper housing 210 of the locking support 230. The upper locking portion 221 and the lower locking portion 222 may be integral with the locking support 230.

When the user presses the cover unit 400 toward the base unit 100 or pulls away from the base unit 100, the corresponding catching portion 410 is between the upper catching portion 221 and the lower catching portion 222. In the state located in the second space of the lower locking portion 222 is moved to the first space or vice versa. As described above, a space exists between the locking support 230 and the inner circumferential surface 210a of the upper housing 210, so that the locking support 230 is the inner circumferential surface of the upper housing 210 when the corresponding locking portion 410 moves. Slightly bent in the direction of 210a and then moved back to the original position when the movement of the corresponding catching part 410 is completed. Through this, the corresponding catching portion 410, the upper catching portion 221 and / or the lower catching portion 222 can be effectively prevented from being damaged as the corresponding catching portion 410 moves, and the cover unit of the user ( 400) ease of operation can be further improved.

On the other hand, in addition to the upper locking portion 221 and the lower locking portion 222 in the locking support 230, an additional locking portion located closer to the base plate 110 than the lower locking portion 222 as shown in FIG. 223 may be positioned on the locking support 230. The additional locking portion 223, like the upper locking portion 221 and the lower locking portion 222, on the surface of the direction away from the upper housing 210 of the locking support portion 230 (center axis 430 direction) Can be located. The additional locking portion 223 may serve to define the first space below the lower locking portion 222 together with the lower locking portion 222. The additional catching part 223 serves to prevent the cover unit 400 from moving excessively in the direction of the base unit 100 by limiting the movement of the corresponding catching part 410 in the direction of the base plate 110. can do. Of course, without the additional locking portion 223, between the lower locking portion 222 and the partition wall 240 may serve to limit the first space. The same is true in the above-described and / or embodiments and variations thereof.

10 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention. In the case of the string winding and unwinding device according to the present embodiment, the locking support part 230 has a shape extending inwardly (in the direction of the center axis 430) from the upper housing 210. The locking support part 230 has a shape bent a plurality of times while extending inwardly from the upper housing 210 so that a space exists between the inner circumferential surface 210a of the upper housing 210. Specifically, the locking support 230 is bent a plurality of times so that at least two convex portions exist in the direction away from the upper housing 210 (the direction of the central axis 430). The upper locking portion 221 and the lower locking portion 222 may be understood to be convex portions of the locking support 230. Of course, the locking support 230 may be integrated with the upper housing 210 as shown in FIG. 10.

When the user presses the cover unit 400 toward the base unit 100 or pulls away from the base unit 100, the corresponding catching portion 410 is between the upper catching portion 221 and the lower catching portion 222. In the state located in the second space of the lower locking portion 222 is moved to the first space or vice versa. As described above, a space exists between the locking support 230 and the inner circumferential surface 210a of the upper housing 210, so that the locking support 230 is the inner circumferential surface of the upper housing 210 when the corresponding locking portion 410 moves. When the movement of the corresponding catching portion 410 is completed by moving in a manner such as slightly bending in the direction of 210a, it may be returned to its original position. Through this, the corresponding catching portion 410, the upper catching portion 221 and / or the lower catching portion 222 can be effectively prevented from being damaged as the corresponding catching portion 410 moves, and the cover unit of the user ( 400) ease of operation can be further improved.

Meanwhile, as shown in FIG. 10, in the locking support part 230 having a bent shape, the distal end portion in the direction of the base plate 110 moves away from the inner circumferential surface 210a of the upper housing 210 (center axis 430 direction). It can be made to have a shape toward). This distal end may be understood as an additional catch 223 as described above with reference to FIG. That is, the distal end may serve as an additional catching part 223 to define a first space under the lower catching part 222 together with the lower catching part 222. The additional catching part 223 serves to prevent the cover unit 400 from moving excessively in the direction of the base unit 100 by limiting the movement of the corresponding catching part 410 in the direction of the base plate 110. can do.

In FIG. 10, the locking support 230 having a plurality of bent shapes extends inwardly from the upper housing 210 and described as being integral with the upper housing 210, but the present invention is not limited thereto. no. For example, as shown in FIG. 11, which is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention, the middle unit 200 of the string winding and unwinding device according to the present embodiment is a flexure ( 230 '). The flexure 230 ′ may be mounted to a through hole or a groove penetrating the upper housing 210. In FIG. 11, a portion of the flexure 230 ′ is inserted into the through hole penetrating the upper housing 210, and thus the flexure 230 ′ is fixed to the upper housing 210. Most of the flexure 230 ′ is positioned inside the upper housing 210. That is, when the flexure 230'is fixed to the upper housing 210, most of the upper housing 210 except for the portion used to be fixed to the upper housing 210 of the flexure 230 '. It is located inside.

The flexure 230 ′ may have a shape similar to that of the locking support 230 having the shape bent a plurality of times described above with reference to FIG. 10. That is, the flexure 230 ′ has a bent shape such that a space exists between the flexure 230 ′ and the inner circumferential surface 210 a of the upper housing 210. Specifically, the flexure 230 ′ is bent a plurality of times so that at least two convex portions exist in a direction away from the upper housing 210 (in the direction of the center axis 430). The upper locking portion 221 and the lower locking portion 222 may be understood to be convex portions of the flexure 230 '. The flexure 230 ′ may be formed using a resin, a metal plate, or the like, and preferably may have elasticity.

When the user presses the cover unit 400 toward the base unit 100 or pulls away from the base unit 100, the corresponding catching portion 410 is between the upper catching portion 221 and the lower catching portion 222. In the state located in the second space of the lower locking portion 222 is moved to the first space or vice versa. As described above, a space exists between the flexure 230 'and the inner circumferential surface 210a of the upper housing 210, so that the flexure 230' is moved to the upper housing 210 when the corresponding catching part 410 moves. Slightly moved in the direction of the inner circumferential surface 210a, and when the movement of the corresponding catching portion 410 is completed, it may be returned to its original position. Through this, the corresponding catching portion 410, the upper catching portion 221 and / or the lower catching portion 222 can be effectively prevented from being damaged as the corresponding catching portion 410 moves, and the cover unit of the user ( 400) ease of operation can be further improved. In addition, if the flexure 230 'is damaged due to repeated use by the user, only the flexure 230' needs to be replaced, thereby greatly improving the ease of maintenance of the string winding and unwinding device.

Meanwhile, as illustrated in FIG. 11, the flexure 230 ′ having a plurality of bent shapes has a distal end in the direction of the base plate 110 away from the inner circumferential surface 210a of the upper housing 210 (center axis 430). Direction). This distal end may be understood as an additional catch 223 as described above with reference to FIG. That is, the distal end may serve as an additional catching part 223 to define a first space under the lower catching part 222 together with the lower catching part 222. The additional catching part 223 serves to prevent the cover unit 400 from moving excessively in the direction of the base unit 100 by limiting the movement of the corresponding catching part 410 in the direction of the base plate 110. can do.

12 is a cross-sectional view of a portion of a string winding and unwinding device according to another embodiment of the present invention. As shown in FIG. 12, in the case of the string winding and unwinding device according to the present exemplary embodiment, the upper locking portion 221 and the lower locking portion 222 may have a concave shape. That is, the upper locking portion 221 and the lower locking portion 222 may be understood to be concave portions formed on the inner circumferential surface 210a of the upper housing 210. In this case, when at least a part of the corresponding catching part 410 is located in the lower catching part 222, the cover unit 400 is engaged with the rotating unit 300, and at least a part of the corresponding catching part 410 is the upper catching part. When positioned in 221, the cover unit 400 may be spaced apart from the rotating unit 300.

On the other hand, in such a string winding and unwinding device, when the corresponding catching portion 410 moves in the state of being located in the upper catching portion 221 to be located in the lower catching portion 222 or vice versa, the movement is easy. It is necessary to do it. To this end, at least a part of the corresponding catching portion 410 may be flexible. Specifically, the distal end portion (in the upper housing 210 direction) of the corresponding catching portion 410 may be flexible. For example, the distal end of the corresponding catching portion 410 can be made flexible by including a rubber or leaf spring. Of course, that at least a part of the corresponding catching part 410 is flexible may be applied to the above-described embodiments, the following embodiments, or modifications thereof with reference to other drawings in addition to the present embodiment.

Alternatively, as shown in FIG. 13, which is a cross-sectional view of a portion of the string winding and unwinding device according to another embodiment of the present invention, the groove 430a is formed on the outer surface of the central axis 430 of the cover unit 400. To be formed, the corresponding catching portion 410 may be fitted to the groove (430a). In this case, at least a part of the corresponding catching part 410 may be flexible. Specifically, the distal end portion (in the upper housing 210 direction) of the corresponding catching portion 410 may be flexible. For example, it can be made flexible by including the counterpart 410 itself or the distal end of the counterpart 410 such as rubber or leaf spring. Of course, such that the groove 430a is formed on the outer surface of the central axis 430 of the cover unit 400 and the corresponding catching portion 410 is fitted to the groove 430a, in addition to the present embodiment in another drawing The same may be applied to the above-described embodiments, the following embodiments, or variations thereof. For reference, that the groove 430a is formed on the outer surface of the central axis 430 may be understood to mean that the through hole penetrating the central axis 430 is formed. This is because a part of the through hole may be interpreted as a groove of the outer surface of the central axis 430.

As described above, when the cover unit 400 is engaged with the rotary unit 300, the ratchet protrusion 460 and the corresponding protrusion 250 are engaged with each other, and the ratchet when the cover unit 400 is spaced apart from the rotary unit 300. The protrusion 460 and the corresponding protrusion 250 are spaced apart from each other. In FIGS. 1 to 13, when the embodiments of the present invention have been described, the ratchet protrusion 460 is located on the bottom surface of the cover plate 400 in the direction of the base plate 110 (-z direction), and the corresponding protrusion ( 250 is formed in the middle unit 200, but the corresponding projection 250 is shown as protruding toward the cover unit 400. Specifically, in FIGS. 1 to 13, the ratchet protrusion 460 is disposed on the lower surface of the base plate 110 direction (-z direction) of the central axis 430 or the base plate 110 direction (−) of the corresponding engaging portion 410. It is shown that it is located on the lower surface of the z direction, and the corresponding projection 250 is located on the upper surface of the cover unit 400 direction (+ z direction) of the partition wall 240. However, the present invention is not limited thereto.

For example, as shown in FIG. 14, which is a perspective view schematically showing the middle unit 200 of the string winding and unwinding device according to another embodiment of the present invention, the corresponding protrusion 250 is an upper housing of the partition wall 240. 210 may be located on the inner surface in the center direction. In this case, as shown in FIG. 15, which is a cross-sectional view of a portion of the cover unit 400 that may be used together with the middle unit 200 of FIG. 14, the ratchet protrusion 460 also has a central axis 430 of the cover unit 400. ), That is, on the surface of the upper housing 210 direction, the ratchet protrusion 460 is engaged with the corresponding protrusion 250 or the corresponding protrusion depending on the distance between the cover unit 400 and the base plate 110. May be spaced apart from 250. Of course, for this purpose, as shown in FIG. 15, the central axis 430 of the cover unit 400 may have a shape extending further in the lower direction (-z direction) than the position of the corresponding catching part 410.

16 is a perspective view schematically showing a shoe according to another embodiment of the present invention. As shown in Fig. 16, the shoe according to the present embodiment has a string winding and unwinding device 1 according to any of the above-described embodiments or variants thereof. For example, the string winding and unwinding device 1 may be attached on the tongue T of the shoe so that the string S is connected to the string winding and unwinding device 1. Of course, the string winding and unwinding device 1 may be attached to other parts, such as the heel portion of the side or the back of the shoe. That is, the string S of the shoe passes through any one of the second side through holes 122 of the base unit 100, passes through the second through hole 332 of the rotation unit 300, and then It may pass through the other one of the two side through-holes (122). Accordingly, when the rotating unit 300 is rotated in one direction by engaging the cover unit 400, the string S is wound around the rotating unit 300. As the winding of the string (S) is made in this way, the shoe can be in close contact with the foot of the user. Of course, when the rotation unit 300 is spaced apart from the cover unit 400 in such a state, the rotation unit 300 may be rotated in the other direction, which is the opposite direction of one direction, accordingly to the rotation unit 300 The wound string S may be unwound from the outer circumferential surface of the rotating unit 300.

Although FIG. 16 illustrates a shoe, the string winding and unwinding device according to the above-described embodiments and modifications thereof is mounted on various items requiring locking by a string such as a hat, a belt, a watch, a bag, and a garment, in addition to the shoe. As described above, various articles equipped with the string winding and unwinding devices according to the above-described embodiments and variations thereof will also be included in the scope of the present invention.

17 is a perspective view schematically showing a string winding and unwinding device according to another embodiment of the present invention. Referring to FIG. 17, the base unit 100 of the string winding and unwinding device according to the present embodiment further includes a clip 140. The clip portion 140 corresponds to the base plate 110 but has a shape extending from the base plate 110 so that a space exists between the base plate 110 and the base plate 110. For this purpose, as shown in FIG. 17, the clip part 140 may have a shape extending from the base plate 110 but bent to have a portion substantially parallel to the base plate 110. The clip unit 140 may be integral with the base plate 110, or may be fixed to a separate component or the base plate 110. The clip unit 140 may have a flexible property, such as a resin or a metal plate.

In the case of the string winding and unwinding device according to the present embodiment, it is possible to easily detachable to the article to be used by the string winding and unwinding device by using the space between the base plate 110 and the clip portion 140. Can be. For example, in the case of a shoe as shown in FIG. 16, the space between the base plate 110 and the clip part 140 is located at the heel tab HT or the tongue T, which is a part of the rear of the shoe that is adjacent to the ankle when worn. By being fitted, the string winding and unwinding device can be easily attached to and detached from the shoe.

18 is a perspective view schematically showing a string winding and unwinding device according to another embodiment of the present invention. Unlike the above description with reference to FIG. 17, the base unit 100 may further include a rail 144 positioned on the bottom surface of the base plate 110 (-z direction) and extending in one direction (y-axis direction). . Of course, in order to have a space between the rail 144 and the base plate 110, the base plate 110 and the rail 144 is connected, but the width narrower than the width (in the x-axis direction) of the rail 144 It may also have a connecting portion 142 having.

The string winding and unwinding device according to this embodiment can be used with the fastening clip 500 as shown in FIG. The fastening clip 500 may have a shape bent a plurality of times as shown in FIG. 19. In FIG. 19, the fastening clip 500 is bent twice, such that the first part 510 and the second part adjacent to each other ( 520 is approximately parallel but there is a space therebetween, and likewise, the third portion 530 adjacent to the second portion 520 and located opposite the first portion 510 is approximately parallel to the second portion 520. As a result, a space exists between the second portion 520 and the second portion 520. In this case, the third portion 530 is disposed in the same plane but has a first guide rail 531 and a second guide rail 532 parallel to each other.

The fastening clip 500 as described above allows the string winding and unwinding device according to the present embodiment to be easily attached to and detached from various articles. For example, in the case of a shoe as shown in FIG. 16, the space between the first part 510 and the second part 520 of the fastening clip 500 as shown in FIG. The third portion 530 may be mounted on the shoe such that the third part 530 is positioned outside the shoe by fitting the heel tab HT or the tongue T, which is an adjacent part. Thereafter, the rail 144 of the string winding and unwinding device according to the present embodiment as shown in FIG. 18 has the first guide rail 531, the second guide rail 532, and the second part of the fastening clip 500. By fitting in the space between the (520), it can be easily mounted to the fastening clip (500).

Meanwhile, the connection part 142 may have a shape extending in one direction (y-axis direction) similarly to the rail 144. The shape of the connection portion 142 corresponds to the shape of the space between the first guide rail 531 and the second guide rail 532 of the fastening clip 500, the user rotates the cover unit 400, etc. In the process of using the string winding and unwinding device, the relative position with respect to the fastening clip 500 of the string winding and unwinding device can be fixed without change. Of course, the shape of the connecting portion 142 is not limited thereto, and may be varied in various ways.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

It is possible to implement a string winding and unwinding device which is simple in construction and easy to maintain.

Claims

A base unit having a base housing and a lower housing having a cylindrical shape and positioned on an upper surface of the base plate and having a side through hole;

A cylindrical upper housing coupled to the lower housing, an upper locking portion located inside the upper housing, and a lower locking portion positioned inside the upper housing but closer to the base plate than the upper locking portion. , Middle unit;

A rotating unit, at least a part of which is located inside the lower housing so as to be rotatable with respect to the base unit, and wherein the string can be wound around the outer circumferential surface or unrolled from the outer circumferential surface; And

The base unit is coupled to the middle unit so as to be rotatable with respect to the middle unit, and has a corresponding catching portion protruding in a radial direction, and the base unit according to a relative position of the upper catching portion and the lower catching portion of the corresponding catching portion. A distance from the variable unit may be engaged with the rotating unit or spaced apart from the rotating unit, and may rotate together with the rotating unit when engaged with the rotating unit;

A string winding and unwinding device having a.
The method of claim 1,

And the upper catching portion and the lower catching portion are located in the upper housing.
The method of claim 1,

The middle unit further includes a latching support portion extended inwardly and bent from the upper housing so that a space exists between the inner circumferential surface of the upper housing,

And the upper locking portion and the lower locking portion are located on a surface in a direction away from the upper housing of the locking support portion.
The method of claim 1,

The middle unit further includes a latching support part extended inwardly from the upper housing and bent a plurality of times so that a space exists between the inner circumferential surface of the upper housing,

And the latching support portion is bent a plurality of times so that at least two convex portions exist in a direction away from the upper housing, and the upper locking portion and the lower locking portion are convex portions of the locking support portion.
The method of claim 1,

The middle unit is further provided with a flexure, located in the inner side of the upper housing and coupled to the upper housing and bent a plurality of times so that there is a space between the inner peripheral surface of the upper housing,

And the flexure is bent a plurality of times so that at least two convex portions exist in a direction away from the upper housing, and the upper catching portion and the lower catching portion are convex portions of the flexure.
The method according to any one of claims 1 to 5,

The upper catching portion and the lower catching portion have a convex shape in a direction away from the inner circumferential surface of the upper housing,

The distance from the base unit of the cover unit may be varied as the corresponding catching portion is located in a first space below the lower catching portion or in a second space between the upper catching portion and the lower catching portion. When the corresponding catching portion is located in the first space, it can be engaged with the rotating unit to rotate together with the rotating unit, and when the corresponding catching portion is located in the second space, the string winding and Unwinding device.
The method of claim 6,

And the distance between the base plate and the second portion away from the upper housing of the upper locking portion is shorter than the distance between the first portion adjacent the upper housing and the base housing of the upper locking portion.
The method according to any one of claims 1 to 3,

And the upper catching portion and the lower catching portion have a concave shape.
The method according to any one of claims 1 to 5,

And at least a portion of said mating engagement portion is flexible.
The method according to any one of claims 1 to 5,

The cover unit has a central axis formed with a groove on the outer surface, the corresponding engaging portion is a string winding and unwinding device, which is fitted into the groove of the central axis.
The method according to any one of claims 1 to 5,

And the cover unit has a one-way ratchet protrusion, and the middle unit has a corresponding protrusion that can engage with the ratchet protrusion therein.
The method of claim 11,

The one-way ratchet protrusion and the corresponding protrusion are engaged with each other when the cover unit is engaged with the rotary unit, and the one-way ratchet protrusion and the corresponding protrusion are spaced apart from each other when the cover unit is spaced apart from the rotary unit. .
The method of claim 11,

The middle unit is located closer to the base plate than the lower engaging portion and has a partition projecting inward, the corresponding projection is located on the surface in the direction of the lower engaging portion of the partition, the string winding and unwinding device.
The method of claim 11,

And the middle unit is located closer to the base plate than the lower locking portion and has a partition wall projecting inward, and the corresponding protrusion is located on an inner side surface of the upper housing center direction of the partition wall.
The method according to any one of claims 1 to 5,

And the base unit further comprises a clip portion corresponding to the base plate but extending from the base plate such that there is a space between the base plate and the base plate.
The method according to any one of claims 1 to 5,

The base unit, the string winding and unwinding device further comprises a rail extending in one direction located on the lower surface of the base plate.