Lace fastener

Abstract

To provide a string fastener capable of fixing a tightening string with a simple and lightweight structure and preventing the tightened tightening string from protruding to the outside. [Solution] The cord fastener 1A is made of a single plate-like base 10. The plate-like base 10 is provided with a pair of cord-passing holes 12 that are holes that penetrate the plate-like base 10 in the thickness direction and through which a tightening cord 24 is inserted from one side to the other, and a position-holding part 14 that is made of a notch formed in the peripheral part of the plate-like base 10 at a position corresponding to the space between the pair of cord-passing holes 12 and that can hold the tightened tightening cord 24 in a position that is inverted from the other side of the plate-like base 10 to one side.

Description

[Technical field]

[0001] The present invention relates to a string fastener for fastening a tightening string (tightening string) inserted through the periphery of a trouser hem or the like in a tightened state. [Background technology]

[0002] A cord fastener as disclosed in Patent Document 1 has been conventionally known. The cord fastener disclosed in Patent Document 1 is composed of a cylindrical stopper body, a locking member fitted into a vertical hole of the stopper body, and a coil spring that biases the locking member. A cord-passing opening is formed on the peripheral surface of the stopper body, and the cord that is passed through the opening into the stopper body is locked by being pinched between the large diameter part of the locking member and the upper inner edge of the cord-passing opening by the biasing force of the coil spring. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3187726 Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional string fastener disclosed in Patent Document 1 can be used to fasten a tightening string that is inserted around the periphery of the bottom of pants such as cargo pants or parachute pants.

[0005] However, conventional string fasteners are made up of multiple parts, making their structure complex and sometimes heavy. Also, when the tightened string is fixed, as shown in Fig. 8, the tightening string protrudes significantly outward from the bottom of the trousers, ruining the appearance and possibly catching on surrounding objects when walking. To avoid such inconveniences, it is necessary to provide the trousers with a function to tie the tightened string tightly or to store or lock the tightened string, which is cumbersome.

[0006] The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a string fastener that can fasten a tightening string with a simple and lightweight structure and can prevent the tightened tightening string from protruding from the hem of trousers, etc. [Means for solving the problem]

[0007] [Aspect 1] In order to solve the above problems, the string fastener of the present invention is a string fastener that secures a string inserted into a garment in a pulled state, and is characterized in that it is made of a single plate-shaped base, and the plate base is equipped with a pair of string-passing holes that each penetrate the thickness direction of the plate base, through which the string is inserted from one side to the other in the thickness direction, and a position maintaining portion that is composed of a notch portion formed in the peripheral portion of the plate base at a position corresponding to the space between the pair of string-passing holes, and that is capable of holding the pulled string in a position inverted from the other side to the one side of the plate base.

[0008] The above-mentioned cord fastener is made of a single plate-shaped base, so that the structure is simple and it is easy to reduce the weight. In addition, by inserting a tightening cord with a diameter slightly larger than the diameter of the cord-passing hole through the cord-passing hole, the tightening cord can be fixed in a tightened state to the cord fastener (plate-shaped base). Moreover, the above-mentioned cord fastener can hold the tightened tightening cord in a position inverted to the opposite side of the cord fastener in the position holding part. Therefore, the tightened tightening cord can be kept in a position rising from the hem of the garment or facing inward from the hem, and as a result, the tightened tightening cord is less likely to stick out from the hem of the garment (e.g., trousers).

[0009] [Aspect 2] In the cord fastener of the first aspect, the position-maintaining portion may be formed so as to be able to integrally hold the tightening cords that are respectively inserted through the pair of cord-passing holes.

[0010] According to this configuration, the laces inserted through the respective through holes can be collectively held in one position-maintaining portion, which prevents the laces from becoming disorganized and improves the appearance of the tightened laces.

[0011] [Aspect 3] In the cord fastener described in aspect 1 or 2, the posture maintaining portion can include a cord receiving opening that opens outward in the in-plane direction of the plate-like substrate, and a cord storage portion that is continuous with the cord receiving opening and is formed with a width wider than the width of the receiving opening, and the width of the cord receiving opening can be configured to be smaller than the diameter of the cord passage hole.

[0012] According to this configuration, the tightening string, which has been inverted to the opposite side of the string fastener, can be inserted into the string housing through the string receiving opening, thereby allowing the position of the tightening string to be held in the position holding section. In this case, since the width of the string receiving opening is smaller than the diameter of the string hole, i.e., smaller than the diameter of the tightening string, the tightening string is less likely to come out of the string housing, and as a result, the position of the tightening string can be more stably maintained.

[0013] [Aspect 4] In the string fastener of any one of Aspects 1 to 3, the position maintaining portion may be formed in a C-shape when viewed in a plan view from one side in the thickness direction.

[0014] With this configuration, the held tightening string is less likely to be damaged, and since the shape of the position-maintaining portion is simple, processing is easy, and productivity of the string fastener is improved.

[0015] [Aspect 5] In the cord fastener of aspect 3 or 4, the width of the cord receiving opening may be 0.7 to 0.8 times the diameter of the cord passage hole.

[0016] This configuration makes it possible to achieve both operability and functionality in relation to the diameter of the tightening string inserted into the string hole. That is, if the width of the string receiving opening is less than 0.7 times the diameter of the string hole, the string receiving opening is too narrow for the diameter of the string, and it tends to be difficult to insert and remove the tightening string into and from the string housing. Conversely, if it exceeds 0.8 times, the tightening string stored in the string housing tends to become easily dislodged. However, within the above range, such inconvenience is unlikely to occur. That is, it is relatively easy to insert and remove the tightening string into and from the string housing, and unintentional dislodging of the tightening string stored in the string housing is suppressed.

[0017] [Aspect 6] In the lace fastener of any of aspects 1 to 5, the posture maintaining portion can be arranged so as to be positioned on a second line segment that passes through the midpoint of a first line segment connecting the centers of the pair of lace holes and is perpendicular to the first line segment.

[0018] According to this configuration, the position maintaining portion is located in the center of the pair of lace holes, so that each lace inserted through each lace hole can be held in a well-balanced manner by the position maintaining portion.

[0019] [Aspect 7] The lace fastener of aspect 6 may include two of the position maintaining parts located on the second line segment and facing in opposite directions.

[0020] This configuration improves the degree of freedom of direction when using the cord fastener. In other words, if the position maintaining part is provided only on one side of the first line segment, it is necessary to consider the direction of the cord fastener beforehand when passing the tightening cord through the plate-like base so that the tightening cord can take the desired position. However, according to the configuration of the seventh aspect, since the position maintaining parts are provided on both sides of the first line segment, after passing the tightening cord through the plate-like base through the cord-passing hole, it is only necessary to use one of the two position maintaining parts that allows the tightening cord to take the desired position. Therefore, it is no longer necessary to consider the direction of the cord fastener when passing the tightening cord through the plate-like base.

[0021] [Aspect 8] In the cord fastener of aspect 7, the plate substrate may be symmetrical with respect to the first line segment.

[0022] According to this configuration, since the plate base has a symmetrical shape with respect to the first line segment, there is no distinction between the front and back of the cord fastener, which improves the convenience when using the cord fastener.

[0023] [Aspect 9] In the cord fastener of aspect 7 or 8, the position maintaining portion can be provided in an area of ​​the plate base that is outside the first line segment in a direction along the second line segment.

[0024] According to this configuration, the position maintaining portion has a tendency to move away from the pair of string holes, which is advantageous in terms of ensuring the strength of the string fastener.

[0025] [Aspect 10] In the cord fastener of aspect 9, the pair of cord insertion holes and the position maintaining portion may be configured not to overlap with each other in a direction along the first line segment.

[0026] According to this configuration, the pair of string holes and the position maintaining portion do not overlap each other in the direction along the first line segment, which is more advantageous in terms of ensuring the strength of the string fastener.

[0027] [Aspect 11] In the cord fastener of any one of the first to tenth embodiments, the plate-like substrate may have a rounded shape without any edge portion.

[0028] According to this configuration, the entire plate-like base has a rounded shape without edges, so that damage to clothing or tightening strings due to contact with the string fastener is unlikely to occur. Effect of the Invention

[0029] According to the present invention, it is possible to provide a string fastener that can fasten a tightening string with a simple and lightweight structure and can prevent the tightened tightening string from protruding from the hem of trousers, etc. [Brief description of the drawings]

[0030] [Figure 1] 1 is a plan view of a strap fastener according to a first embodiment of the present invention; FIG. [Diagram 2] FIG. [Diagram 3] 11A and 11B are diagrams illustrating an example of a state in which the string fastener is used. [Figure 4] 11A to 11C are explanatory diagrams of how to use the string fastener. [Diagram 5] FIG. 4 is a plan view of a strap fastener according to a second embodiment of the present invention; [Figure 6] 11A and 11B are diagrams illustrating an example of a state in which the string fastener is used. [Figure 7] 13A and 13B are diagrams illustrating another example of the string fastener in use. [Figure 8] FIG. 1 is a diagram showing an example of a conventional string fastener in use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments are merely examples of the present invention and are not intended to limit the technical scope of the present invention.

[0032] [Configuration of the cord fastener according to the first embodiment] FIG. 1 is a plan view of a cord fastener 1A according to a first embodiment of the present invention, and FIG. 2 is a front view of the cord fastener 1A.

[0033] The string fastener 1A is made of a single plate-like substrate 10 having a first main surface 10a and a second main surface 10b back to back. The plate-like substrate 10 is made of a resin material or a metal. The resin material may be, for example, a thermoplastic resin such as polyamide, polyacetal, or polypropylene, or a thermoplastic elastomer such as a urethane-based elastomer or a polyester-based elastomer. The metal material may be a light metal such as an aluminum alloy.

[0034] The plate-shaped substrate 10 has a horizontally long elliptical shape in a plan view (hereinafter simply referred to as a plan view) seen from one side in the thickness direction. The plate-shaped substrate 10 has no edges and is formed into a rounded shape as a whole (see FIG. 4).

[0035] The plate-like substrate 10 has a pair of string-insertion holes 12 each penetrating in the thickness direction, and a position-maintaining portion 14 consisting of a notch portion formed on the periphery.

[0036] The pair of string holes 12 are holes through which a tightening string 24 (shown in FIG. 3) is inserted around the periphery of the bottom of a garment such as trousers. The cross-sectional shape of each string hole 12 is circular. The centers of the string holes 12 are located on the major axis of the plate-like base 10, and the string holes 12 are provided at symmetrical positions across the minor axis of the plate-like base 10, spaced a predetermined distance apart.

[0037] The position maintaining portion 14 is a portion that maintains the position of the tightening laces 24 that are inserted through the lace holes 12 in an inverted state. The inverted state refers to a state in which the tightening lace 24 that has been passed from the first main surface 10a side to the second main surface 10b side is folded back toward the first main surface 10a side.

[0038] The position maintaining portion 14 is formed at a position corresponding to the space between the pair of string-passing holes 12 on the peripheral portion of the plate-shaped base 10. More specifically, the position maintaining portion 14 is located on a second line segment L2 that passes through the midpoint of a first line segment L1 connecting the centers of the pair of string-passing holes 12 and is perpendicular to the first line segment L1. In this example, the first line segment L1 corresponds to the long axis of the plate-shaped base 10, and the second line segment L2 corresponds to the short axis of the plate-shaped base 10.

[0039] In addition, the posture maintaining portion 14 is provided in a region of the plate-shaped base 10 that is outer than the first line segment L1 in the direction along the second line segment L2, i.e., a region that does not straddle the first line segment L1, and the string passage hole 12 and the posture maintaining portion 14 do not overlap each other in the direction along the first line segment L1.

[0040] The position-maintaining part 14 is formed in a C-shape in a plan view, and includes a string receiving opening 14a that opens outward in the in-plane direction of the plate-shaped base body 10, and a string housing part 14b that is continuous with the string receiving opening and is formed with a width wider than the width of the receiving opening. The in-plane direction is the direction along the first main surface 10a (second main surface 10b). In other words, the position-maintaining part 14 is formed so as to be able to hold the tightening string 24 by inserting the tightening string 24 into the string housing part 14b through the string receiving opening 14a.

[0041] In the position maintaining part 14, the width W1 of the string receiving opening 14a is set to 0.7 to 0.8 times the diameter of the string hole 12. The maximum width W2 of the string housing part 14b in the direction along the first line segment L1 is set to 2.0 to 2.1 times the diameter of the string hole, and the maximum width W3 of the string housing part 14b in the direction along the second line segment L2 is set to 1.2 to 1.3 times the diameter of the string hole. By setting the dimensions in this way, in relation to the diameter of the tightening string 24, it becomes possible for the position maintaining part 14 to stably hold the tightening string 24.

[0042] [Example of using string fasteners] FIG. 3 is a diagram showing an example of the cord fastener 1A in use, and FIG. 4 is an explanatory diagram of how to use the cord fastener 1A.

[0043] Fig. 3 shows the hem 22 of trousers 20 similar to the trousers described in the Background Art (Fig. 8). In detail, a tightening string 24 is inserted around the periphery of the hem 22 of the trousers 20, and the hem 22 of the trousers 20 is shown in a state where it has been tightened using a string fastener 1A attached to the tightening string 24.

[0044] The tightening string 24 is, for example, a round elastic string. The tightening string 24 may be a string other than a round elastic string, but it is preferable that the diameter of the tightening string 24 is slightly larger than the diameter of the string hole 12.

[0045] As shown in Fig. 3, the tightening string 24 is pulled out from a part of the peripheral edge of the hem 22, and the string fastener 1A is attached to the middle part of the tightening string 24 thus pulled out. Specifically, as shown in Fig. 4(a), the tightening string 24 is inserted through a pair of string holes 12 so as to pass through the pair of string holes 12, and the part of the tightening string 24 between the two string holes 12 is pulled out in a loop shape (referred to as the fastening part 24a). In the example of Fig. 4(a), the fastening part 24a is pulled out to the second main surface 10b side of the plate-like base body 10.

[0046] As described above, since the diameter of the string hole 12 is smaller than the diameter of the tightening string 24 (the tightening string 24 is drawn thin in FIG. 4 for convenience), the tightening string 24 is engaged with, i.e., fixed to, the string fastener 1A by its elastic force. Therefore, by tightening the fastening portion 24a and fixing it with the string fastener 1A, the hem 22 of the trousers 20 can be tightened to a desired degree. Note that the string fastener 1A is attached to the tightening string 24 in advance so that the position maintaining portion 14 faces upward (is located on the upper side) relative to the hem 22 of the trousers 20 when the fastening portion 24a is tightened in this manner.

[0047] As shown in Fig. 4(b), the retaining portion 24a is held by the position maintaining portion 14 in an inverted state, that is, folded back from the second main surface 10b side to the first main surface 10a side. Specifically, the base portion of the retaining portion 24a is inserted into the string housing portion 14b through the string receiving opening 14a, so that the loop-shaped retaining portion 24a is gathered together and held by the position maintaining portion 14. By holding the retaining portion 24a in this manner by the position maintaining portion 14, the retaining portion 24a is held in a standing position along the hem 22, as shown in Fig. 3.

[0048] [effect] As described above, the string fastener 1A of the embodiment is made of a single plate-like base 10, and therefore has a simple structure and is easy to reduce in weight. In addition, by using a tightening string 24 with a diameter slightly larger than the diameter of the string-passing hole 12, the tightening string 24 can be fixed in a pulled state, and the hem 22 of the trousers 20 can be tightened to a desired degree. Moreover, the fastened tightening string 24, i.e., the fastening portion 24a, can be held in an inverted state on the opposite side of the plate-like base 10 by the position holding portion 14, so that the fastening portion 24a can be kept in a position rising from the hem 22 of the trousers 20.

[0049] Therefore, according to the string fastener 1A of the embodiment, the tightening string 24 can be fixed with a simple and lightweight structure, and the fastening portion 24a of the tightening string 24 can be prevented from protruding outside the hem 22 of the trousers 20.

[0050] In the cord fastener 1A of the embodiment, the posture maintaining portion 14 is formed to be capable of integrally holding the tightening cords 24 that are respectively inserted into the pair of cord-passing holes 12. This prevents the tightening cords 24 from becoming disorganized, improving the appearance of the fastening portion 24a.

[0051] In addition, in the actual form of the cord fastener 1A, the posture maintaining portion 14 includes a cord receiving opening 14a that opens outward in the in-plane direction of the plate-shaped base body 10, and a cord storage portion 14b that is continuous with the cord receiving opening 14a and is formed with a width wider than the width of the cord receiving opening 14a, and the width of the cord receiving opening 14a is smaller than the diameter of the cord passage hole 12.

[0052] Therefore, the position of the fastening portion 24a can be well maintained by inserting the fastening portion 24a, which has been inverted to the opposite side of the cord fastener 1A, into the cord housing portion 14b through the cord receiving opening 14a. In this case, since the width of the cord receiving opening 14a is smaller than the diameter of the cord passage hole 12, i.e., smaller than the diameter of the tightening cord 24, the fastening portion 24a is unlikely to come off the cord housing portion 14b, and as a result, the position of the fastening portion 24a can be stably maintained.

[0053] In this case, the posture-maintaining portion 14 is formed in a C-shape when viewed in a plane, so that it is less likely to damage the held tightening string 24 (pull-up portion 24a), and since the shape of the posture-maintaining portion is simple, it is easy to process and the productivity of the string fastener 1A is good.

[0054] In addition, in the actual form of the cord fastener 1A, the width W1 of the cord receiving opening 14a is set to 0.7 to 0.8 times the diameter of the cord passage hole 12, so that it is possible to achieve a good balance between operability and functionality in relation to the diameter of the tightening cord 24 inserted into the cord passage hole 12. That is, if the width W1 of the cord receiving opening 14a is less than 0.7 times the diameter of the cord passage hole 12, the cord receiving opening 14a is somewhat narrower than the diameter of the tightening cord 24, and it tends to be difficult to insert and remove the tightening cord 24 into and from the cord storage section 14b, and conversely, if it exceeds 0.8 times, the tightening cord 24 stored in the cord storage section 14b tends to be easily unintentionally removed. However, if it is within the above range, such inconvenience is unlikely to occur, and the position holding section 14 can properly hold the retaining portion 24a.

[0055] In addition, in the actual string receiving opening 14a, the position maintaining portion 14 is provided so as to be positioned on a second line segment L2 that passes through the midpoint of a first line segment L1 connecting the centers of both string holes 12 and is perpendicular to the first line segment L1. In other words, since the position maintaining portion 14 is provided in the center of the pair of string holes 12, the tightening strings 24 inserted through each string hole 12 can be held in a well-balanced manner by the position maintaining portion 14.

[0056] In this case, the posture maintaining portion 14 is provided in a region of the plate-shaped base 10 that is outside the first line segment L1 in the direction along the second line segment L2, i.e., a region that does not straddle the first line segment L1. Therefore, compared to a case in which the posture maintaining portion 14 is provided up to a region inside the first line segment L1, the pair of string-passing holes 12 and the posture maintaining portion 14 tend to be farther apart, which is advantageous in terms of ensuring the strength of the string fastener 1A.

[0057] In particular, in the embodied string fastener 1A, the pair of string passage holes 12 and the posture maintaining portion 14 do not overlap each other in the direction along the first line segment L1, which is more advantageous in ensuring the strength of the string fastener 1A than if they overlap.

[0058] [Second embodiment] FIG. 5 is a plan view of a cord fastener 1B according to a second embodiment of the present invention, and FIG. 6 is a diagram showing an example of the cord fastener 1B in use.

[0059] As shown in Figures 5 and 6, the cord fastener 1B according to the second embodiment is provided with two position maintaining portions 14, and in this respect the configuration differs from that of the cord fastener 1A of the first embodiment. The other configuration is the same as that of the cord fastener 1A of the first embodiment. The position maintaining portions 14 are provided on the second line segment L2 so as to face in opposite directions to each other, and the cord fastener 1B (plate-shaped base 10) has a shape that is symmetrical with respect to the first line segment L1 in a plan view.

[0060] The cord fastener 1B of the second embodiment as described above has the advantage of improving the degree of freedom of direction when used. That is, in the case of the cord fastener 1A of the first embodiment in which the position maintaining portion 14 is provided only on one side of the first line segment L1, it is necessary to take care so that the cord fastener 1A is attached to the tightening cord 24 so that the fastening portion 24a stands up along the hem 22 of the trousers 20, that is, so that the position maintaining portion 14 faces upward (is located on the upper side) with respect to the hem 22 of the trousers 20. However, according to the cord fastener 1B of the second embodiment, since the position maintaining portions 14 are provided on both sides of the first line segment L1, it is only necessary to use the position maintaining portion 14 located on the upper side out of the two upper and lower position maintaining portions 14, as shown in FIG. 6. Therefore, it is not necessary to take into consideration the direction of the cord fastener 1B when attaching the cord fastener 1B to the tightening cord 24.

[0061] In particular, since the plate-like base body 10 of the cord fastener 1B has a symmetrical shape with respect to the first line segment L1, there is no distinction between the front and back of the cord fastener 1B. This makes the cord fastener 1B more convenient to use.

[0062] [Variations] The cord fasteners 1A and 1B described above are examples of preferred embodiments of the cord fastener according to the present invention, and the specific configuration of the cord fastener can be appropriately changed without departing from the gist of the present invention.

[0063] For example, the cord fasteners 1A and 1B (plate-shaped base 10) of the embodiment have a horizontally long elliptical shape in a plan view from one side in the thickness direction, and a pair of cord-passing holes 12 are provided so that their centers are located on the major axis of the elliptical shape. In other words, the cord fasteners 1A and 1B have an elliptical shape that is elongated in the direction in which the pair of cord-passing holes 12 are arranged. However, the shape of the cord fasteners 1A and 1B is not limited to an ellipse. For example, the cord fasteners 1A and 1B may have an elongated rectangular shape in the direction in which the pair of cord-passing holes 12 are arranged, or may have other shapes. The shape of the plate-shaped base 10, the specific shapes of the cord-passing holes 12 and the position-maintaining portion 14, and the numerical ranges of the above dimensions are merely examples, and can be appropriately changed depending on the material, cross-sectional shape, etc. of the tightening cord 24 used.

[0064] In the embodiment, the cord fasteners 1A and 1B are described as fastening the tightening cord 24 inserted into the peripheral portion of the hem 22 of the trousers 20 in a tightened state. However, the cord fasteners 1A and 1B can also be used to fasten the tightening cord 34 inserted into the cuff 32 of the down jacket 30 by tightening it, as shown in FIG. 7, in addition to fastening the tightening cord 24 inserted into the peripheral portion of the hem 22 of the trousers 20. With this configuration, as shown in the figure, the fastening portion 34a can be held by the position holding portion 14 so that the fastening portion 34a is in an inward position. This prevents the fastening portion 34a from protruding too far outward from the cuff 32. [Explanation of symbols]

[0065] 1A, 1B string clasp 10 Plate-shaped substrate 10a First main surface 10b Second main surface 12 Lace hole 14 Posture holding part 14a Strap receiving port 14b String storage section 20 Trousers 22 Hem 24 Tie string 24a Retaining part L1 First line segment L2 Second line segment W1, W2, W3 width

Claims

1. A string fastener for fastening a tightening string inserted into a garment in a tightened state, It consists of a single plate-like substrate, The plate-like substrate is a pair of string-insertion holes each penetrating the plate-like base in a thickness direction, through which the tightening string is inserted from one side to the other side in the thickness direction; a position-retaining portion that is formed at a position corresponding to between the pair of string-passing holes in the peripheral portion of the plate-shaped base, and that is capable of holding a tightened tightening string in an inverted position from the other side to the one side of the plate-shaped base.

2. The strap fastener according to claim 1, The lace fastener, characterized in that the posture maintaining portion is formed to be capable of integrally holding the tightening laces that are respectively inserted through the pair of lace passing holes.

3. The strap fastener according to claim 1 or 2, the position maintaining portion includes a string receiving opening that opens outward in an in-plane direction of the plate-like substrate, and a string housing portion that is continuous with the string receiving opening and has a width greater than that of the receiving opening, A string fastener, characterized in that the width of the string receiving opening is smaller than the diameter of the string passing hole.

4. The strap fastener according to claim 3, The string fastener, characterized in that the posture maintaining portion is formed in a C-shape when viewed in a plan view from one side in the thickness direction.

5. The strap fastener according to claim 4, A string fastener, characterized in that the width of the string receiving opening is 0.7 to 0.8 times the diameter of the string passing hole.

6. The strap fastener according to claim 1 or 2, The lace fastener is characterized in that the posture maintaining portion is located on a second line segment that passes through a midpoint of a first line segment connecting the centers of the pair of lace holes and is perpendicular to the first line segment.

7. The strap fastener according to claim 6, The string fastener comprises two of the posture maintaining portions located on the second line segment and facing in opposite directions.

8. The strap fastener according to claim 7, The string fastener, wherein the plate-like base has a shape symmetrical with respect to the first line segment.

9. The strap fastener according to claim 7, The string fastener, characterized in that the posture maintaining portion is provided in an area of ​​the plate-shaped base that is outer than the first line segment in a direction along the second line segment.

10. The strap fastener according to claim 9, The string fastener, wherein the pair of string-passing holes and the posture maintaining portion do not overlap each other in a direction along the first line segment.

11. The strap fastener according to claim 1 or 2, The string fastener is characterized in that the plate-like substrate has a rounded shape without edges.

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