WO2018143715A1

WO2018143715A1 - String tightening device

Info

Publication number: WO2018143715A1
Application number: PCT/KR2018/001428
Authority: WO
Inventors: 김태성; 김장아; 홍석준; 조성훈
Original assignee: 주식회사 박의지
Priority date: 2017-02-02
Filing date: 2018-02-02
Publication date: 2018-08-09
Also published as: KR20180090065A

Abstract

A string tightening device is disclosed. The string tightening device is characterized by comprising: a housing having an open upper surface; a spool which is rotatably arranged inside the housing, which has a ring-shaped planar shape, and which is configured to tighten a string when rotating in a first direction and to loosen the string when rotating in a second direction; a rotating handle arranged over the housing so as to cover the open upper surface of the housing and rotatably coupled to the housing; a rotation switching button having the shape of a column or a pin, the rotation switching button vertically penetrating the center portion of the upper surface of the rotating handle to be able to ascend and descend, the upper end portion of the rotation switching button being connected to the rotating handle to be able to rotate together with the rotating handle, and the lower end portion of rotation switching button being coupled to the spool such that, when rotating in the first direction together with the rotating handle, the spool can be rotated; an elastic spring arranged below the rotation switching button so s to pressurize the rotation switching button toward the rotating handle, the elastic spring being configured such that, when the rotation switching button receives pressure and descends, the elastic spring is contracted and, when the rotation switching button is released from the pressure, the elastic spring is restored; and a decoupling means provided inside the housing to be positioned below the rotation switching button and configured such that, when the rotation switching button descends and then ascends by means of a button pressing operation that presses the rotation switching button, the decoupling means is connected to the rotation switching button and decouples the rotation switching button and the spool from each other, and the decoupling means is spaced from the rotation switching button by a rotation starting operation that starts a rotation of the rotation switching button and enables the rotation switching button to return to the condition in which the same is coupled with the spool.

Description

String tightening device

FIELD OF THE INVENTION The present invention relates to a string tightening device, the invention relates to a string tightening device for winding and unwinding a string in articles comprising any article wherein the two portions are selectively pulled and tightened and loosened by the string.

The string tightening device is configured to wind and unwind the string in any articles in which the two portions are selectively pulled and tightened and loosened by the string. For example, strap fasteners are used in wearable products such as cycle shoes, boots, other foot fasteners, belts, hats, gloves, splints, helmets, boot fasteners, backpacks, and the like.

An example of a string tightening device is disclosed in Republic of Korea Patent No. 10-0929587 "line length adjusting device". This patent has a structure in which the string is wound and unwinded when the rotating housing is rotated, and the winding operation and the unwinding operation are carried out by pressing and pulling the rotating housing by a cap coupled to the rotating housing and a spring coupled to the fixed housing. It is configured to be switched. That is, the switching of the winding operation and the unwinding operation of the string has a structure in which the user switches by applying a force in the vertical direction. When the user switches the winding operation and the unwinding operation of the string by applying a force in the vertical direction, there is a concern that the winding and unwinding device may be easily broken.

In addition, since the cap is configured to move up and down the spring through the annular spring, a relatively large force may be required for the user to pull or press the rotary housing in the vertical direction.

In addition, only a part of the cap may pass through the spring in the process of pulling or pressing the rotary housing in a vertical direction, whereby the rotation of the rotary housing may occur in a single operation of applying a force in the vertical direction. In this case, there is a problem in that the operation of applying a force in the vertical direction to wind the string or to unwind the string may be repeated two or more times.

Therefore, there is a risk of breakage and inconvenience in use in the case of a string tightening device having a structure in which the switching of the winding operation and the unwinding operation of the string is performed by applying force in the vertical direction. .

Accordingly, the problem to be solved by the present invention is that, in articles including any product in which the two parts are selectively pulled and tightened and loosened by the string, the operation for the user to wind and unwind the string requires a great force. The present invention provides a string tightening device that can be made simply without and provides improved convenience in operation for switching the winding operation and the unwinding operation of the string.

String tightening device according to the invention the upper surface is open housing; A spool rotatably disposed in the housing, the planar shape being annular, the spool configured to wind a string when rotated in a first direction and to unwind a string when rotated in a second direction; A rotation knob disposed on the housing to cover the open upper surface of the housing and coupled to the housing to be rotatable; It is in the form of a column or a pin, the upper end is connected to the rotary knob in the first direction so as to be rotatable with the rotary knob by vertically penetrating the center of the upper surface of the rotary knob to enable the lifting and lowering, with the rotary knob in the first direction A rotation change button having a lower end coupled to the spool so as to rotate the spool when rotated; An elastic spring disposed below the rotation switching button to press the rotation switching button in the direction of the rotation handle, and to contract when the pressure is applied to the rotation switching button and to be restored when the pressure is released to the rotation switching button; And provided in the housing so as to be positioned below the rotation switching button, and connected to the rotation switching button when the rotation switching button ascends after descending by a button pressing operation of pressing the rotation switching button. And a coupling releasing means for releasing the coupling and spaced apart from the rotation switching button by the rotation start operation of starting the rotation of the rotation switching button so that the rotation switching button can be returned to the coupled state with the spool. It is characterized by.

In one embodiment, the spool includes a first hollow disposed at the center of the spool so as to be perpendicular to a bottom surface of the housing and first engaging protrusions arranged along an inner circumference of the first hollow, wherein the rotation knob A button coupling hole disposed concentrically with the first hollow and first coupling elements extending in a vertical direction to an inner surface of the button coupling hole and having a height smaller than that of the button coupling hole, wherein the rotation switching button Is a first region inserted into the button engagement hole, a second region extending below the first region and coupled to the spool, and arranged along the outer surface of the first region and coupled to the first coupling element. 2 engaging elements and corresponding or corresponding to the first engagement protrusions arranged along the outer circumference of the second region and depending on the distance that the first region rises and falls; And second engaging protrusions disposed in the second area to a height that is possible, and the rotation switching button is coupled to the spool when the second engaging protrusions correspond to the first engaging protrusions. When the engaging protrusions are connected to the decoupling means after being spaced apart from the first engaging protrusions, the coupling with the spool may be configured to be released.

In one embodiment, the coupling decoupling means is provided to protrude from the bottom surface of the housing is disposed under the first engaging projections, the shaft accommodating a shaft including a second hollow disposed concentric with the first hollow part; It is arranged spaced apart a predetermined distance along the inner circumference of the second hollow, and the projections recessed from the lower end of the inner surface during the projection and the projection during the projection when the rotation switching button is lowered in the vertical direction Shaft lowering guide portion comprising a surface; And positioned below the respective shaft lowering guide parts to be adjacent to the shaft lowering guide parts, the second engaging protrusions being inclined at a predetermined angle downward toward the bottom surface of the housing and along the inner surface during the protrusion period. And a shaft rotation guide portion including a rotation guide surface positioned below a descending path, wherein each of the second engagement protrusions sequentially rotates the inner surface and the rotation during the projection according to the start and release of the button pressing operation. After moving along the guide surface to rotate the rotation switching button a predetermined radius may correspond to the projection receiving surface.

In one embodiment, the housing is provided to protrude from the bottom surface of the housing to a height greater than the height of the shaft receiving portion, and includes a button position alignment column disposed concentric with the rotation switching button, the elastic spring is the button Coupled to the alignment column, the rotation switching button includes a column receiving hole extending from the lower end of the rotation switching button to a diameter and a height that can accommodate the button alignment column, the rotation switching button is to be raised and lowered When combined with the pillar receiving hole can be raised and lowered.

In one embodiment, the rotary knob and the housing may further include a rotary restraining member for maintaining the rotated state in the first direction when the rotary knob rotates the spool in the first direction.

The rotation knob includes a column-shaped insertion portion disposed concentrically with the button coupling hole and inserted into an open upper surface of the housing, wherein the rotational restraining member is arranged at regular intervals along an outer surface of the insertion portion. Paul of; And an inner side of the open upper surface of the housing, one side of which allows the pawl to slide, allowing the spool to rotate in the first direction and the other side of the pawl to limit the sliding of the pawl. Rotation in the second direction may include a ratchet teeth to prevent.

According to the string tightening device according to the present invention, in articles including any product in which two portions are selectively pulled and tightened and loosened by the string, a manipulation for winding and unwinding the string by the user is required. There is an advantage that can be made simply without, and can provide improved convenience in the operation for switching the winding operation and the unwinding operation of the string.

1 is an exploded perspective view showing the configuration of the string tightening device according to an embodiment of the present invention.

FIG. 2 is a combined perspective view of FIG. 1.

FIG. 3 is a view illustrating the arrangement structure between the shaft lowering guide parts and the shaft rotation guide parts in an exploded view.

4 is a cross-sectional view illustrating a state in which the rotation switch button shown in FIG. 1 is coupled to a spool.

5A and 5B are views for explaining a process of guiding the second engagement protrusion of the rotation change button when the string is to be unwound.

6 and 7 are a perspective view and a cross-sectional view showing a state in which the coupling of the rotation switching button and the spool shown in FIG. 1 is released.

8A and 8B are views for explaining a process of guiding the second engagement protrusion of the rotation switching button when the string is to be wound.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the string tightening device according to an embodiment of the present invention. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is an exploded perspective view showing the configuration of the string tightening device according to an embodiment of the present invention, Figure 2 is a perspective view of the combination of FIG.

1 and 2, the string tightening device according to an embodiment of the present invention, the housing 100, the spool 200, the rotary knob 300, the rotation switching button 400, the elastic spring 500, It may include a decoupling means.

The housing 100 may be provided in a hollow form to accommodate the spool 200, and an upper surface thereof may be opened to allow insertion of the spool 200. The shape of the inner surface of the hollow may be a variety of shapes, such as a circle or a square, preferably a circular shape. The shape of the housing 100 is not particularly limited, and the outer surface may have a circular or polygonal shape. For example, the housing 100 may have a hollow cylindrical shape with an open top surface. In addition, a string insertion hole 103 for inserting a string into the side of the housing 100 may be formed.

The spool 200 winds and unwinds a string. The spool 200 may be rotatably disposed inside the housing 100. The spool 200 may be configured to wind a string when rotated in a first direction (eg, clockwise) and to loosen the string when rotated in a second direction (eg, counterclockwise). This spool 200 may be annular. For example, the spool 200 has a circular ring-shaped upper plate 210, a circular ring-shaped lower plate 220 spaced apart from the upper plate 210, and a cylinder 230 connecting the upper plate 210 and the lower plate 220. It can be made of). A string may be wound around the cylinder 230. On one side of the cylinder 230, a binding hole 231 for binding the string may be formed through the side surface of the cylinder 230. When the string is to be bound to the binding hole 231, one end of the string is inserted into the string insertion hole 103 of the housing 100, and then inserted into the binding hole 231, and then inserted into the binding hole 231. One end of the string may be fixed to the spool 200 by knotting the end.

In addition, the spool 200 has a first hollow 240 and a first hollow 240 disposed in the center of the spool 200, for example, the center of the cylinder 230 so as to be perpendicular to the bottom surface of the housing 100. The first engaging protrusions 250 may be arranged along the inner circumference of the. For example, the first hollow 240 is disposed below the first insertion hole 241 and the first insertion hole 241 extending from the upper surface of the upper plate 210 and larger than the first insertion hole 241. It may include a second insertion hole 242 having a. The first engagement protrusions 250 may be arranged at regular intervals along the inner circumference of the first insertion hole 241 and may protrude to a predetermined height from the inner surface of the first insertion hole 241. The shape of the first engagement protrusions 250 is not particularly limited.

The rotary knob 300 is provided to rotate the spool 200 in the first direction and the second direction. The rotary knob 300 may be disposed on the housing 100 to cover the open upper surface of the housing 100, and may be coupled to the housing 100 so as to be rotatable. The rotary knob 300 may include an upper surface portion 301 and a side wall portion 302 extending downward from the upper surface portion 301. In order to couple the rotation knob 300 to the housing 100, for example, an annular protrusion 102 is formed on an outer surface of the housing 100, and the inner surface of the side wall part 302 of the knob 300 is rotated. An annular groove 330 fastened to the annular protrusion 102 may be formed. The annular protrusion 102 and the annular groove 330 is coupled to each other when the rotary knob 300 is coupled to the housing 100 to prevent the rotary knob 300 from being separated from the housing 100, the rotary knob Since the 300 is to be rotated freely to rotate the spool 200, the annular protrusion 102 and the annular groove 330 may be fastened to each other to have a distance spaced apart to allow the rotation knob 300 to rotate. . There is no particular limitation on the shape of the rotation knob 300, for example, it may be provided so that the planar shape has a circular shape.

In addition, the rotation knob 300 may include a button coupling hole 310 and the first coupling elements (320). The button coupling hole 310 is a hole through which the rotation switching button 400 passes. The button coupling hole 310 is formed through the center of the upper surface of the rotary knob 300 and disposed concentrically with the first hollow 240 of the housing 100 in a state in which it is coupled with the housing 100. 240 may be disposed above. The first coupling elements 320 may extend in a direction perpendicular to the inner surface of the button coupling hole 310 and have a height smaller than the height of the button coupling hole 310. The first coupling elements 320 may be arranged along the inner circumference of the button coupling hole 310 and may have a groove or a protrusion shape. For example, the first coupling elements 320 may have a groove shape. The upper end of the groove may be located lower than the height of the upper end of the button coupling hole 310. The number of the first coupling elements 320 is not particularly limited, and may be two or more.

The rotation switching button 400 is a configuration for switching the rotation of the spool 200 in the first direction and the rotation in the second direction. The rotation switching button 400 may be vertically penetrated through the upper surface center of the rotation knob 300 to be raised and lowered, and the upper end may be connected to the rotation knob 300 to be rotatable with the rotation knob 300. In order to rotate the spool 200 in the first direction, the rotation switching button 400 is coupled to the spool 200 at the lower end so as to rotate the spool 200 when the rotation knob 300 is rotated together in the first direction. Can be ring. In order to rotate the spool 200 in the second direction, the rotation switching button 400 may be spaced apart from the spool 200 to release the coupling state with the spool 200.

The rotation switching button 400 may be in the form of a pillar or a pin, and include a first region inserted into the button coupling hole 310 and a second region extending below the first region and coupled to the spool 200. Can be. For example, the rotation switching button 400 may include a head portion 410 as a first region, and may include a shaft portion 420 as a second region. The head portion 410 is provided with a diameter corresponding to the diameter of the button coupling hole 310 can be inserted into the button coupling hole 310, the shaft portion 420 is the first hollow 240 of the spool 200 It is provided with a diameter corresponding to the first insertion hole 241 of the can be inserted into the first hollow 240 of the spool 200.

The head portion 410 may be provided with second coupling elements 411 for coupling with the first coupling elements 320 to be coupled to the rotary knob 300, the shaft portion 420, the spool 200 The second engagement protrusions 421 may be provided for coupling with the second engagement protrusions 421. The second coupling elements 411 may be in the form of grooves or protrusions. For example, the second coupling elements 411 may be protruding to be fastened to the first coupling elements 320 in the groove shape. When the second coupling elements 411 are coupled to the first coupling elements 320, the heights of the groove-like first coupling elements 320 are lower than the height of the button coupling hole 310, so that the second coupling elements are coupled to the first coupling elements 320. 411 may not be separated in the direction of the upper surface portion of the button coupling hole 310. The first engagement protrusions 250 may be engaged with the first engagement protrusions 250 provided on the inner surface of the first insertion hole 241 of the first hollow 240 of the spool 200. It may be arranged at the same interval as the spacing and may be provided in the same number as the number of the first engagement protrusions (250).

The elastic spring 500 is such that the rotary knob 300 is always in a state of being pressed in the direction of the rotary knob 300. To this end, the elastic spring 500 may be disposed below the rotation switching button 400 in the housing 100 to press the rotation switching button 400 in the direction of the rotation knob 300. The elastic spring 500 is contracted when the pressure is applied to the rotation switching button 400 is lowered and is restored when the pressure is released to the rotation switching button 400 to allow the rotation switching button 400 to rise. For example, the elastic spring 500 may be a coil spring.

The coupling release means 600 may maintain the state in which the coupling is released because the rotation switching button 400 is spaced apart from the spool 200. The coupling releasing means 600 may be provided inside the housing 100 to be positioned below the rotation switching button 400 so as to be connected to the rotation switching button 400 lowered to be spaced apart from the spool 200. That is, the coupling releasing means 600 is connected to the rotation switching button 400 when the rotation switching button 400 is raised and lowered by the button pressing operation of pressing the rotation switching button 400 to rotate the rotation switching button 400. And the coupling of the spool 200 is released, and when the rotation of the rotation switching button 400 starts by the rotation start operation of starting the rotation of the rotation switching button 400, the rotation is spaced apart from the rotation switching button 400. The changeover button 400 may be returned to the coupled state with the spool 200.

For example, the coupling release means 600 may include a shaft accommodating part 610, first shaft moving guide parts 620, and second shaft moving guide parts 630.

The shaft accommodating part 610 may accommodate the shaft part 420 when the rotation switching button 400 descends. The shaft accommodating part 610 may be provided to protrude from the bottom surface 101 of the housing 100 to be disposed below the first engagement protrusions 250, and the first hollow 240 of the spool 200. It may include a second hollow 611 disposed concentrically. The shape of the shaft accommodating part 610 is not particularly limited, and may be, for example, a cylindrical shape. The shaft accommodating part 610 may be accommodated in the second insertion hole 242 of the first hollow 240 of the spool 200. Accordingly, the spool 200 is configured based on the shaft accommodating part 610. Can be rotated.

The first shaft movement guide parts 620 may guide the lowering of the rotation switching button 400. Each first shaft movement guide part 620 may include an inner surface 621 and a projection receiving surface 622 during the projection period. During the projection, the inner surface 621 may extend to be perpendicular to the bottom surface 101 of the housing 100, thereby guiding the movement of the second engagement protrusions 421 of the rotation switching button 400 in the vertical direction. Can be. The protrusion receiving surface 622 is disposed to be indented from the lower end of the inner surface 621 during the protrusion so that the second engagement protrusions 421 guided along the inner surface 621 during the protrusion are accommodated inside the second hollow 611. Can support the state. For example, the protrusion receiving surface 622 is indented from the lower end of the inner surface 621 during the protrusion to stably support the second engagement protrusions 421 and the bottom surface 101 of the housing 100 from the indented position. It may be provided to be gradient in the direction.

The second shaft movement guide parts 630 are second engagement protrusions 421 lowered toward the bottom surface 101 of the housing 100 through the inner surface 621 during the protrusion of the first shaft movement guide parts 620. It can be guided to move in the direction of the projection receiving surface 622. To this end, the second shaft movement guide parts 630 are disposed below the first shaft movement guide parts 620 and adjacent to the first shaft movement guide parts 620, and the rotation guide surface 631 is provided. It may include. The rotation guide surface 631 is sloped downward toward the bottom surface 101 of the housing 100 and may be positioned below a path along which the second engagement protrusions 421 descend along the inner surface 621 during the protrusion period. have. 3 is an exploded view illustrating the arrangement structure between the shaft lowering guide parts and the shaft rotation guide parts, and the structure of the second shaft moving guide parts 630 is well illustrated in FIG. 3.

The coupling release means 600 is used to start and release the button pressing operation of pressing the rotation switching button 400 according to the arrangement of the first shaft movement guide parts 620 and the second shaft movement guide parts 630. Accordingly, each of the second engagement protrusions 421 sequentially moves along the inner surface 621 and the rotation guide surface 631 during the turning period so that the rotation switching button 400 rotates by a predetermined radius, and then the projection receiving surface 622. May correspond to.

On the other hand, the housing 100 may include a button alignment column 104, the rotation switching button 400 may include a pillar receiving hole 430 for coupling with the button alignment column 104.

The button position alignment column 104 may be guided to move without flow when the rotation switching button 400 is lowered and raised. The button position position alignment column 104 may protrude from the bottom surface of the housing 100 to a height equal to or greater than the height of the shaft accommodating portion 610 in the shaft accommodating portion 610 and may be disposed concentrically with the rotation switching button 400. have. For example, the button position alignment column 104 may have a cylindrical shape. The elastic spring 500 may be coupled to the button position alignment column 104.

The pillar receiving hole 430 may be formed in the shaft portion 420 of the rotation switching button 400 of the rotation switching button 400, the rotation switching to a diameter and height that can accommodate the button position alignment column 104 It may extend from the lower end of the button 400. The pillar receiving hole 430 is coupled with the button position alignment column 104 when the rotation switching button 400 is lowered and raised to guide the movement in the vertical direction by the button position alignment column 104.

On the other hand, the string tightening device according to an embodiment of the present invention may further include a rotary binding member 700.

The rotary binding member 700 may be provided in the rotary knob 300 and the housing 100 to maintain the rotary knob 300 in the first direction when the rotary knob 300 rotates the spool 200 in the first direction. . For example, the rotational restricting member 700 may include a plurality of poles 710 and ratchet teeth 720.

A plurality of poles 710 may be provided in the rotary handle 300. In order to include a plurality of poles 710, the rotary knob 300 may include a columnar insertion part 340 disposed concentrically with the button coupling hole 310 and inserted into an open upper surface of the housing 100. Can be. The insertion part 340 may be inserted into an open upper surface of the housing 100 when the rotation knob 300 is coupled to the housing 100. For example, the insertion part 340 may have a cylindrical shape. In this case, the plurality of poles 710 may be arranged at regular intervals along the outer circumference of the insertion portion 340.

The ratchet tooth 720 has a triangular tooth shape, one side of which allows the spool 200 to slide in the first direction by allowing the pole 710 to slide when the rotary knob 300 rotates in the first direction. Rotation is allowed, while the other side limits the sliding of the pawl 710 to prevent the spool 200 from rotating in the second direction. The ratchet tooth 720 is formed on the inside of the open upper surface of the housing 100, when the rotary knob 300 is coupled to the housing 100, the insertion portion 340 into the inside of the open upper surface of the housing 100 As it is inserted may correspond to the plurality of poles 710.

Since the configuration and operation of the pawls 710 and the ratchet teeth 720 are the same as those of a general ratchet structure, more detailed description thereof will be omitted.

Hereinafter, the process of winding the string and the process of unwinding the string through the string tightening device according to an embodiment of the present invention 2, 4, 5a and 5b, 6, 7, 7, 8a and FIG. It demonstrates with reference to 8b. 4 is a cross-sectional view illustrating a state in which the rotation switching button shown in FIG. 1 is coupled to a spool, and FIGS. 5A and 5B illustrate a process of guiding the second engagement protrusion of the rotation switching button when unwinding a string. 6 and 7 are perspective views and cross-sectional views illustrating a state in which the rotation switching button and the spool are uncoupled from each other, and FIGS. 8A and 8B are rotated to wind the string. FIG. 4 is a diagram illustrating a process of guiding the second engagement protrusion of the switch button.

In the state in which the rotation switching button 400 and the spool 200 are coupled, that is, the plurality of poles 710 and the open upper surface of the housing 100 provided in the insertion part 340 of the rotation switching button 400. The provided ratchet teeth 720 correspond to each other, and the second engagement protrusions 421 of the rotation switching button 400 are coupled to the first engagement protrusions 250 of the spool 200 to enable the winding of the string. To unwind the string wound on the spool 200 from;

It can be lowered by the button pressing operation for pressing the rotation switching button 400. That is, the user presses the rotation switching button 400 down so that the vertical pressure acts on the rotation switching button 400. According to this operation, the rotation switching button 400 can be lowered in the direction of the bottom surface 101 of the housing 100, the elastic spring 500 can be retracted. In this case, as shown in FIG. 5A, the second engagement protrusions 421 are spaced apart from the first engagement protrusions 250 and then the inner surface 621 of the protrusions of the first shaft movement guide parts 620 adjacent to each other. Can be moved down toward the rotation guide surface 631, as shown in Figure 5b, the second engagement protrusions 421 in contact with the rotation guide surface 631 is the second shaft movement guide parts 630 A predetermined distance may be moved along the rotation guide surface 631. When the second engagement protrusions 421 move a predetermined distance along the rotation guide surface 631, the rotation change button 400 may be rotated by a predetermined radius. This process is a state in which the vertical pressure applied to the rotation switching button 400 is maintained.

Subsequently, when the button pressing operation is released, the contracted elastic spring 500 is restored to press the rotation switching button 400 in the direction of the rotation knob 300 to increase the rotation switching button 400, and at this time, rotation switching The second engagement protrusions 421 of the button 400 may rise while being spaced apart from the rotation guide surface 631 to correspond to the protrusion receiving surface 622 of the first shaft movement guide parts 620. Accordingly, as shown in FIGS. 6 and 7, the rotation switching button 400 may be maintained in a lowered state.

Also in this process, the second coupling elements 411 of the projection type of the rotation switching button 400 moves along the first coupling elements 320 of the groove shape of the rotation knob 300, the rotation switching button ( 400 may be lowered and raised in a state in which the pillar receiving hole 430 is coupled with the button position alignment pillar 104. Accordingly, the rotation switching button 400 can be lowered and raised in position without flow.

As soon as the rotation switching button 400 and the spool 200 are coupled by this process, as soon as the coupled state is released, the spool 200 is rotated in the second direction so that the spool 200 is pulled tightly and wound. Can be loosened.

To wind the string unwinded on the spool 200;

It can be raised by the rotation start operation to start the rotation of the rotation switching button 400. That is, the user may start the operation of holding the rotation switch button 400 is lowered to the unwinding state of the string to rotate the rotation switch button 400. In this operation, the rotation switching button 400 is pressed upward by the elastic spring 500 while the second engagement protrusions 421 are in contact with the projection receiving surface 622 of the first shaft movement guide parts 620. In the state can move along the inclined direction of the projection receiving surface 622 to descend in the direction of the bottom surface 101 of the housing 100, the second engaging projections 421 to the end of the projection receiving surface 622 is When moved, as shown in FIG. 8A, the second engagement protrusions 421 are spaced apart from the protrusion receiving surface 622 of the first shaft movement guide parts 620, and the elastic spring 500 is restored and the elastic spring is restored. As the 500 is restored, the rotation change button 400 is raised to move the second engagement protrusions 421 along the inner surface 621 during the protrusion period, as shown in FIG. 8B, and then the first of the spool 200. It may be engaged with the engaging protrusions 250. Accordingly, as shown in FIGS. 2 and 4, the rotation switching button 400 and the spool 200 may be coupled.

When the rotation knob 300 is further rotated in the first direction while the rotation switch button 400 and the spool 200 are coupled by the above process, the rotation switch button 400 rotates together with the rotation knob 300. The spool 200 coupled to the rotation switching button 400 may be rotated in the first direction by the rotation knob 300 and the rotation switching button 400 rotating in the first direction.

When the spool 200 is rotated in the first direction, the string may be wound around the spool 200. At this time, when the spool 200 is rotated by a predetermined radius several times through the rotary knob 300 and the rotation switch button 400, the state in which the spool 200 is rotated at each number of times is set by the rotary binding member 700. It may not reverse in two directions. That is, when the rotary knob 300 is rotated in the first direction, the plurality of poles 710 provided in the insertion portion 340 of the rotary knob 300 rotates while riding over the ratchet teeth 720 in the housing 100. When the rotation knob 300 stops rotating in the first direction, the plurality of poles 710 may be supported on one side of the ratchet tooth 720 to limit the reverse rotation, thereby not rotating in the second direction. Can be. As a result, the wound state of the string wound on the spool 200 may not be released.

The string tightening device according to an embodiment of the present invention is coupled to or uncoupled from the spool 200 by a first operation, which is a button pressing operation of pressing the rotation switching button 400, and a second operation, which is a rotation start operation. Raising and lowering may be configured to switch the rotation of the spool 200 in the first direction and the rotation in the second direction. Accordingly, the user can easily switch the rotation direction of the spool 200 according to the first operation of pressing the rotation switching button 400 and the second operation of rotating the rotation knob 300 by a predetermined radius to wind and unwind the string. Can be.

Accordingly, a string tightening device according to an embodiment of the present invention provides a user with an article for winding and unwinding a string in articles including any article in which two portions are selectively pulled and loosened by a string. There is an advantage that it can be made simply without requiring a large force, and can provide improved convenience in the operation for switching the winding operation and the unwinding operation of the string.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention should not be limited to the embodiments set forth herein but should be construed in the broadest scope consistent with the principles and novel features set forth herein.

Claims

A housing having an open top surface;

A spool rotatably disposed in the housing, the spool having a ring shape and configured to wind a string when rotated in a first direction, and to loosen a string when rotated in a second direction;

A rotation knob disposed on the housing to cover the open upper surface of the housing and coupled to the housing to be rotatable;

It is in the form of a column or a pin, the upper end is connected to the rotary knob in the first direction so as to be rotatable with the rotary knob by vertically penetrating the center of the upper surface of the rotary knob to enable the lifting and lowering, with the rotary knob in the first direction A rotation change button having a lower end coupled to the spool so as to rotate the spool when rotated;

An elastic spring disposed below the rotation switching button to press the rotation switching button in the direction of the rotation handle, and to contract when the pressure is applied to the rotation switching button and to be restored when the pressure is released to the rotation switching button; And

The housing is provided in the housing so as to be located below the rotation switching button, and when the rotation switching button is raised and lowered by the button pressing operation of pressing the rotation switching button, the rotation switching button is coupled to the rotation switching button and the spool. And a coupling releasing means for releasing the ring and spaced apart from the rotation switching button by the rotation start operation of starting the rotation of the rotation switching button so that the rotation switching button can be returned to the coupled state with the spool. Characterized by

String tightening device.
The method of claim 1,

The spool includes a first hollow disposed at the center of the spool so as to be perpendicular to a bottom surface of the housing, and first engaging protrusions arranged along an inner circumference of the first hollow,

The rotary knob includes a button coupling hole disposed concentrically with the first hollow and first coupling elements extending in a vertical direction to an inner surface of the button coupling hole and having a height smaller than that of the button coupling hole.

The rotation switching button is a first region inserted into the button engaging hole, a second region extending below the first region and coupled to the spool, arranged along the outer circumference of the first region and the first coupling element Second coupling elements coupled to the second coupling element, and arranged at a circumference of an outer surface of the second area and at a height corresponding to or spaced apart from the first engagement protrusions according to a distance at which the first area rises and falls. Second engaging protrusions disposed in the second region,

The rotation switching button is coupled to the spool when the second engagement protrusions correspond to the first engagement protrusions, and is connected to the decoupling means after the second engagement protrusions are spaced apart from the first engagement protrusions. When the coupling with the spool is configured to be released,

String tightening device.
The method of claim 2,

The coupling decoupling means,

A shaft accommodating part provided to protrude from a bottom surface of the housing and disposed below the first engagement protrusions and including a second hollow disposed concentrically with the first hollow;

It is arranged spaced apart a predetermined distance along the inner circumference of the second hollow, and the projections recessed from the lower end of the inner surface during the projection and the projection during the projection when the rotation switching button is lowered in the vertical direction Shaft lowering guide portion comprising a surface; And

Located below the respective shaft lowering guide portion and disposed to be adjacent to the shaft lowering guide portions, the second engagement protrusions are lowered along the inner surface during the projection during the projection at a predetermined angle downwardly toward the bottom surface of the housing. It includes a shaft rotation guide portion including a rotation guide surface located below the path,

According to the start and release of the button pressing operation, the respective second engagement protrusions sequentially move along the inner surface and the rotation guide surface during the protrusion period to rotate the rotation switching button by a predetermined radius and then correspond to the protrusion receiving surface. Characterized in that

String tightening device.
The method of claim 3,

The housing is provided to protrude from the bottom surface of the housing to a height greater than the height of the shaft receiving portion, and includes a button position alignment column disposed concentric with the rotation switching button,

The elastic spring is coupled to the button alignment column,

The rotation switching button includes a column receiving hole extending from the lower end of the rotation switching button to a diameter and height that can accommodate the button position alignment pillar,

The rotation switching button is combined with the column receiving hole when the rising and falling, characterized in that the rising and falling,

String tightening device.
The method of claim 2,

And a rotational restriction member provided in the rotation knob and the housing to maintain the rotation knob rotated in the first direction when the rotation knob rotates the spool in the first direction.

String tightening device.
The method of claim 5,

The rotary knob includes a columnar insertion portion disposed concentrically with the button coupling hole and inserted into an open upper surface of the housing.

The rotational binding member,

A plurality of poles arranged at regular intervals along an outer circumference of the insert; And

It is formed inside the open upper surface of the housing, one side to allow the pole to slide to allow the spool to rotate in the first direction and the other side to limit the sliding of the pole so that the spool Characterized in that it comprises a ratchet tooth which prevents rotation in the second direction,

String tightening device.