Tightening device

Abstract

The utility model provides a fastening device and a fastening device. Compared with the conventional fastening device made of synthetic resin, the whole fastening device can be thinned up and down so as to reduce the possibility of being clamped and hung on other components, and the fastening device can reduce the number of parts so as to reduce the manufacturing cost. A tightening device is provided with: a cover (110) having a first cover-side protrusion (112), a first cover-side locking part (112a) provided on the inner peripheral surface of the first cover-side protrusion (112), and a ratchet (112b) provided on the outer peripheral surface of the first cover-side protrusion (112); a reel (120) having a first reel-side flange section (121) provided on the outer peripheral surface thereof with a first reel-side locking section (121a); and a base (130) having a pawl (132a) provided on the inner peripheral surface of a base-side protruding portion (132), the ratchet wheel being engaged with the pawl, and the first cover-side engaging portion being engaged with the first reel-side engaging portion.

Description

Technical Field

[0001] This utility model relates to fastening devices made of synthetic resin, and to fastening devices for clothing stoppers, etc. Background Technology

[0002] In the case of athletic shoes and other footwear, by pulling the shoelaces through the eyelets or other perforations to tighten the laces, the fit between the shoe and the user's foot can be improved, resulting in more comfortable walking.

[0003] Furthermore, when the user is a child in the lower grades of elementary school or a preschool child, or an elderly person, it is not easy to untie or tighten shoelaces. Therefore, a device for smoothly untying or tightening shoelaces, as described in Patent Document 1, has been proposed in the past.

[0004] The fastening device described in Patent Document 1 has a winding member 155 through which a thread L, which can be used as a shoelace or the like, passes, and a rotating cover 151 for rotating the winding member 155. The thread L can be fastened by rotating the rotating cover 151 in one direction, and the thread L can be untied by pulling both ends of the thread L while raising the rotating cover 151 so that the winding member 155 can be rotated in another direction.

[0005] More specifically, the fastening device described in Patent Document 1 has an intermediate member 153 that moves integrally with the rotating cover 151 and has a locking engagement portion 153f, and the winding member 155 has a locking type engagement portion 155f that engages with the locking engagement portion 153f.

[0006] Furthermore, when tightening the wire L, the rotating cover 151 and the intermediate member 153 are lowered, thereby engaging the locking engagement part 153f with the locking type engagement part 155f. When loosening the wire L, the rotating cover 151 and the intermediate member 153 are raised, thereby releasing the engagement between the locking engagement part 153f and the locking type engagement part 155f.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent No. 6681386 Utility Model Content

[0010] Problems to be solved by utility models

[0011] However, the fastening device described in Patent Document 1 is configured such that the locking engagement portion 153f protrudes downward from the intermediate member 153, and the locking engagement portion 155f protrudes upward from the winding member 155. Therefore, the fastening device as a whole is relatively thick in the vertical direction. Consequently, in situations such as walking, the fastening device is more likely to get caught on other components.

[0012] Furthermore, the fastening device described in Patent Document 1 consists of a large number of components, such as a rotating cover 151, an intermediate member 153, a winding member 155, a housing 157, and a support 160, which may increase the manufacturing cost.

[0013] This utility model was designed in consideration of the above-mentioned problems, and its purpose is to provide a fastening device that, compared with conventional synthetic resin fastening devices, can reduce the overall thickness of the device in the vertical direction and reduce the possibility of it getting stuck on other components, as well as a fastening device that can reduce the number of parts and reduce manufacturing costs.

[0014] Solution for solving the problem

[0015] To achieve the above objectives, the present invention has the following features.

[0016] (Feature 1)

[0017] A fastening device (100, 200) comprising:

[0018] The cover (110, 210) has a flat portion (111, 211), a first cover-side protrusion (112, 212) provided on the lower surface of the flat portion (111, 211) and protruding downward, a first cover-side locking portion (112a, 212a) provided on the inner peripheral surface of the first cover-side protrusion (112, 212), and a ratchet (112b, 212b) provided on the outer peripheral surface of the first cover-side protrusion (112, 212);

[0019] The reel (120, 220) has a first reel-side flange (121, 221) with a first reel-side locking portion (121a, 221a) on its outer peripheral surface, a first reel-side cylindrical portion (122, 222) provided on the lower surface of the first reel-side flange (121, 221) and protruding downward, and a second reel-side flange (123, 223) provided at the lower end of the first reel-side cylindrical portion (122, 222);

[0020] The base portion (130, 230) has a base side flange portion (131, 231), a base side protrusion portion (132, 232) provided on the upper surface of the base side flange portion (131, 231) and protruding upward, and claws (132a, 232a) provided on the inner peripheral surface of the base side protrusion portion (132, 232).

[0021] The reels (120, 220) are located on the inner circumference of the base-side protrusions (132, 232).

[0022] The first cover-side protrusion (112, 212) is located on the inner periphery of the base-side protrusion (132, 232) and on the outer periphery of the first reel-side flange (121, 221).

[0023] The ratchet (112b, 212b) engages with the pawl (132a, 232a), and the first cover-side locking part (112a, 212a) engages with the first reel-side locking part (121a, 221a).

[0024] (Feature 2)

[0025] The covers (110, 210) are configured to move upward relative to the reels (120, 220) and the bases (130, 230).

[0026] When the covers (110, 210) move upward, the engagement of the claws (132a, 232a) with the ratchet (112b, 212b) and the engagement of the first cover-side locking part (112a, 212a) with the first reel-side locking part (121a, 221a) are disengaged.

[0027] (Feature 3)

[0028] The first cover-side locking portion (112a, 212a) has a concave-convex shape on the entire inner circumferential surface of the first cover-side protrusion (112, 212).

[0029] The ratchet (112b, 212b) has a concave-convex shape on the entire outer peripheral surface of the protrusion (112, 212) on the first cover side.

[0030] The concave-convex shape of the ratchet (112b, 212b) is larger in size than the concave-convex shape of the first cover-side locking part (112a, 212a).

[0031] The claws (132a, 232a) are larger in size than the first reel side locking parts (121a, 221a).

[0032] (Feature 4)

[0033] The first reel side locking parts (121a, 221a) are provided on the outer peripheral surface of the first reel side flange parts (121, 221) at a period of 90 degrees.

[0034] (Feature 5)

[0035] When the cover (110) moves upward, the engagement between the first cover-side locking part (112a) and the first reel-side locking part (121a) disengages when the claw (132a) is engaged with the ratchet (112b).

[0036] (Feature 6)

[0037] The reel (120) has a second reel-side cylindrical portion (124) protruding upward from the center of the first reel-side flange portion (121, 221) and second reel-side locking portions (124a, 124b) provided at the upper end of the second reel-side cylindrical portion (124) and extending toward the outer and inner peripheral sides of the second reel-side cylindrical portion (124).

[0038] The cover (110) has a cover-side cylindrical portion (114) that protrudes upward from the center of the planar portion (111) and has an upper end portion (114b), a second cover-side protrusion (115) that protrudes downward from the center of the lower surface of the upper end portion (114b), and a second cover-side locking portion (115a) that is provided on the outer peripheral surface of the second cover-side protrusion (115).

[0039] When the pawl (132a) engages with the ratchet (112b) and the first cover-side locking part (112a) engages with the first reel-side locking part (121a), the second reel-side locking part (124b) engages with the second cover-side locking part (115a).

[0040] When the cover (110) moves upward and the engagement of the claw (132a) with the ratchet (112b) and the engagement of the first cover-side locking part (112a) with the first reel-side locking part (121a) are both disengaged, the second reel-side locking part (124a) on the outer periphery engages with the flat part (111), and the second reel-side locking part (124b) on the inner periphery engages with the second cover-side locking part (115a).

[0041] (Feature 7)

[0042] The base (130) has an anti-detachment portion (132c) provided on the inner peripheral surface of the base side protrusion (132), and the second reel side flange portion (123) is fixed relative to the base (130) by means of the anti-detachment portion (132c).

[0043] (Feature 8)

[0044] The fastening device (200) further includes a shaft (250), which has a shaft-side flange (251), a downwardly projecting shaft-side protrusion (252) located at the center of the lower surface of the shaft-side flange (251), and a shaft-side locking portion (252a) located on the outer peripheral surface of the shaft-side protrusion (252).

[0045] The cover (210) has a generally circular second cover-side engaging portion (214) at the center of the planar portion (211), the second cover-side engaging portion (214) being capable of radial elastic deformation and having a second cover-side opening (214a) at the center.

[0046] When the pawl (232a) engages with the ratchet (212b) and the first cover-side locking part (212a) engages with the first reel-side locking part (221a), the second cover-side locking part (214) engages with the lower end of the shaft-side locking part (252a).

[0047] When the cover (210) moves upward and the engagement of the claw (232a) with the ratchet (212b) and the engagement of the first cover-side locking part (212a) with the first reel-side locking part (221a) are both disengaged, the second cover-side locking part (214) engages with the upper end of the shaft-side locking part (252a).

[0048] (Feature 9)

[0049] The shaft (250) has a smaller diameter portion (252b) located below the shaft-side locking portion (252a), and a screw hole (252d) is located at the center of the lower end of the shaft-side protrusion (252).

[0050] The reel (220) has a reel-side protrusion (222b) protruding inward on the inner circumferential surface of the first reel-side cylindrical portion (222).

[0051] The base (230) has a screw through hole (233a) in the center of the side flange (231).

[0052] With the small diameter portion (252b) positioned on the reel-side protrusion (222b), the screw (260) is threaded into the screw hole (252d) via the screw through hole (233a).

[0053] Effects of the utility model

[0054] The fastening device (100, 200) of this utility model has the structure described above. With this structure, a fastening device (100, 200) can be provided that can be thinned in the vertical direction and can be designed with a simple structure compared with conventional fastening devices made of synthetic resin. Attached Figure Description

[0055] Figure 1 This is a perspective view of the fastening device according to the first embodiment.

[0056] Figure 2 This is an exploded perspective view of the fastening device according to the first embodiment.

[0057] Figure 3 (a) is a perspective view of the bottom side of the cover according to the first embodiment. Figure 3 (b) is a front view of the reel according to the first embodiment.

[0058] Figure 4 (a) is a top view of the fastening device of the first embodiment when it is unlocked. Figure 4 (b) is Figure 4 (a) A sectional view of the fastening device along line AA.

[0059] Figure 5 (a) is a front view of the fastening device of the first embodiment when it is unlocked. Figure 5 (b) is Figure 5 (a) BB line sectional view of the fastening device.

[0060] Figure 6 (a) is a top view of the fastening device of the first embodiment when locked. Figure 6 (b) is Figure 6 (a) A cross-sectional view of the fastening device along the CC line.

[0061] Figure 7 (a) is a front view of the fastening device of the first embodiment when locked. Figure 7 (b) is Figure 7 (a) A DD-line sectional view of the fastening device.

[0062] Figure 8 This is a perspective view of the fastening device according to the second embodiment.

[0063] Figure 9 This is an exploded perspective view of the fastening device according to the second embodiment.

[0064] Figure 10 (a) is a perspective view of the bottom side of the shaft according to the second embodiment. Figure 10 (b) is a perspective view of the bottom side of the cover according to the second embodiment. Figure 10(c) is the front view of the reel in the second embodiment.

[0065] Figure 11 (a) is a top view of the fastening device of the second embodiment when it is unlocked. Figure 11 (b) is Figure 11 (a) A DD-line sectional view of the fastening device.

[0066] Figure 12 (a) is a front view of the fastening device of the second embodiment when it is unlocked. Figure 12 (b) is Figure 12 (a) A FF-line sectional view of the fastening device.

[0067] Figure 13 (a) is a top view of the fastening device of the second embodiment when locked. Figure 13 (b) is Figure 13 (a) is a cross-sectional view of the fastening device along line GG.

[0068] Figure 14 (a) is a front view of the fastening device of the second embodiment when locked. Figure 14 (b) is Figure 14 (a) HH line cross-sectional view of the fastening device.

[0069] Explanation of reference numerals in the attached figures

[0070] 100, 200: Fastening device; 110, 210: Cover; 111, 211: Flat part; 111a, 211a: First cover side opening; 112, 212: First cover side protrusion; 112a, 212a: First cover side locking part; 112b, 212b: Ratchet; 113, 213: Operating part; 114: Cover side cylindrical part; 114a: Second cover side opening; 114b: Upper end; 115: Second cover Side protrusion; 115a: Second cover side locking part; 214: Second cover side engaging part; 214a: Second cover side opening; 215: Guide part; 120, 220: Reel; 121, 221: First reel side flange; 121a, 221a: First reel side locking part; 221b: First reel side opening; 221c: Second reel side opening; 122, 222: First reel side cylindrical part; 122a, 222 a: Rope through hole on the reel side; 222b: Reel side protrusion; 123, 223: Second reel side flange; 124: Second reel side cylindrical portion; 124a: Second reel side locking portion extending outward; 124b: Second reel side locking portion extending inward; 124c: Slit; 130, 230: Base; 131, 231: Base side flange; 132, 232: Base side protrusion; 132a, 2 32a: Claw; 132b, 232b: Rope through hole on base side; 132c: Anti-slip part; 132d: Slit; 233: Protrusion on the second base side; 233a: Screw through hole; 140, 240: Rope; 141, 241: Rope side locking part; 250: Shaft; 251: Shaft side flange part; 252: Shaft side protrusion part; 252a: Shaft side locking part; 252b: Small diameter part; 252d: Screw hole; 260: Screw. Detailed Implementation

[0071] The embodiments of this utility model will now be described with reference to the accompanying drawings. These embodiments are not independent of each other; those skilled in the art can appropriately combine them without excessive explanation and grasp the synergistic effects resulting from such combinations. Repetitive descriptions between embodiments are omitted in principle.

[0072] The direction is defined as follows. The up-down direction is the direction in which the rotational operating shaft of the fastening device 100 faces (specifically...) Figure 4 In the state shown in (b), the direction from the cover 110, 210 to the base 130, 230 (described later) is defined as the downward direction, and conversely, the direction from the base 130, 230 to the cover 110, 210 is defined as the upward direction.

[0073] <First Embodiment>

[0074] Reference Figures 1 to 7 This describes the first embodiment of the present invention.

[0075] The fastening device 100 consists of a cover 110, a reel 120, a base 130, and a rope 140.

[0076] Figure 1 This is a diagram showing the state of the fastening device 100 after assembly.

[0077] The size of the fastening device 100 varies depending on the thickness of the rope 140, its purpose, etc., but when the purpose is for shoes, it is preferable that the radial length (diameter) is about 35 mm and the vertical thickness is about 10 mm.

[0078] (Cover 110)

[0079] Cover 110 is formed using thermoplastic resins such as polyamide, polyacetal, polypropylene, polyethylene terephthalate, polyethylene, and ABS. Figure 2 and Figure 3 As shown in (a), it comprises a flat portion 111 having a first cover-side opening 111a at its center, a first cover-side protrusion 112 on the lower surface of the flat portion 111 and protruding downward, an operating portion 113 on the lower surface of the outer peripheral end of the flat portion 111 and protruding downward, a first cover-side locking portion 112a on the inner peripheral surface of the first cover-side protrusion 112, a ratchet 112b on the outer peripheral surface of the first cover-side protrusion 112, a cover-side cylindrical portion 114 protruding upward from the first cover-side opening 111a and having an upper end portion 114b and a second cover-side opening 114a on its side, a second cover-side protrusion 115 protruding downward at the center of the lower surface of the upper end portion 114b, and a second cover-side locking portion 115a on the outer peripheral surface of the second cover-side protrusion 115.

[0080] like Figure 4 As shown in (a), the planar portion 111 is circular in shape when viewed from above. Furthermore, as... Figure 5 As shown in (b), the first cover-side protrusion 112 and the operation part 113 are in the shape of a ring.

[0081] The first cover-side locking part 112a provided on the inner peripheral surface of the first cover-side protrusion 112 is configured to engage with the first reel-side locking part 121a of the reel 120 described later, and the ratchet 112b provided on the outer peripheral surface of the first cover-side protrusion 112 (the surface opposite to the first cover-side locking part 112a) is configured to engage with the pawl 132a of the base 130 described later.

[0082] Moreover, such as Figure 5As shown in (b), the first cover-side locking part 112a is configured with a concave-convex shape on the entire inner peripheral surface of the first cover-side protrusion 112, and the ratchet 112b is configured with a concave-convex shape on the entire outer peripheral surface of the first cover-side protrusion 112. The concave-convex shape of the ratchet 112b is configured to be larger than the concave-convex shape of the first cover-side locking part 112a.

[0083] like Figure 4 As shown in (b), the first cover-side protrusion 112, which has a first cover-side locking portion 112a and a ratchet 112b, does not protrude downward beyond the operating portion 113 provided on the lower surface of the outer peripheral end of the flat portion 111. Due to this structure, the user cannot see the first cover-side protrusion 112 when the fastening device 100 is attached to clothing, thus improving the appearance.

[0084] Furthermore, the operating part 113 is preferably provided with an anti-slip element on its peripheral surface. The structure of the anti-slip element is not particularly limited; for example, such as... Figure 2 As shown, by providing uneven surfaces on the outer periphery of the operating part 113, it can be configured as an anti-slip component.

[0085] The second side opening 114a of the cover-side cylindrical portion 114 protruding upward from the first cover-side opening 111a is as follows: Figure 4 As shown in (b), the end of the second reel-side locking portion 124a of the reel 120 described later is shaped such that two second cover-side openings 114a are provided on the side of the cover-side cylindrical portion 114 at opposite positions (positions separated by 180 degrees).

[0086] The second side protrusion 115 is generally cylindrical in shape, such as Figure 4 As shown in (b), it can enter the second reel-side cylindrical portion 124 of the reel 120, which will be described later.

[0087] Furthermore, the second cover-side locking part 115a provided on the outer peripheral surface of the second cover-side protrusion 115 engages with the second reel-side locking part 124b of the reel 120, which will be described later.

[0088] (Reel 120)

[0089] Similar to cover 110, reel 120 is formed using thermoplastic resins such as polyamide, polyacetal, polypropylene, polyethylene terephthalate, polyethylene, and ABS. Figure 2 and Figure 3As shown in (b), it is composed of a first reel-side flange 121 with a first reel-side locking portion 121a on its outer peripheral surface, a first reel-side cylindrical portion 122 provided on the lower surface of the first reel-side flange 121 and protruding downward, a reel-side rope through hole 122a provided on the side of the first reel-side cylindrical portion 122, a second reel-side flange 123 provided at the lower end of the first reel-side cylindrical portion 122, a second reel-side cylindrical portion 124 protruding upward from the center position of the first reel-side flange 121, and second reel-side locking portions 124a and 124b provided at the upper end of the second reel-side cylindrical portion 124 and extending to the outer and inner peripheral sides of the second reel-side cylindrical portion 124.

[0090] like Figure 2 As shown, the flange portion 121 on the side of the first reel and the flange portion 123 on the side of the second reel are circular in shape.

[0091] In addition, such as Figure 6 As shown in (b), the thickness of the first reel side flange 121 in the height direction is approximately the same as the thickness of the first cover side protrusion 112 of the cover 110 in the height direction.

[0092] And, as Figure 6 As shown in (b), the diameter of the first reel-side flange 121 is approximately the same as the diameter of the inner circumferential surface of the first cover-side protrusion 112 of the cover 110, thereby enabling the first reel-side locking portion 121a to engage with the first cover-side locking portion 112a provided on the inner circumferential surface of the first cover-side protrusion 112.

[0093] The first reel side locking part 121a is provided on the outer peripheral surface of the first reel side flange part 121 at a period of 90 degrees.

[0094] If the cycle of the first reel side locking part 121a is less than 90 degrees, and if the reel 120 is to be manufactured integrally by resin injection molding using a mold, an undercut will be generated between the first reel side locking parts 121a during resin injection molding. Therefore, an additional mold for forming the undercut must be prepared.

[0095] However, when the cycle of the first reel side locking part 121a is set to 90 degrees, the reel 120 can be formed without the need for an additional mold for forming the undercut part of the first reel side locking part 121a, thus making the manufacture of the reel 120 easier.

[0096] Two reel-side rope through holes 122a are provided on the side of the first reel-side cylindrical portion 122, which is located on the lower surface of the first reel-side flange portion 121 and protrudes downward. These holes are located at opposite positions (180 degrees apart).

[0097] The side rope through hole 122a of the reel is configured to communicate with the base side rope through hole 132b of the base 130, which will be described later.

[0098] Furthermore, the rope through hole 122a on the reel side is smaller in size than the rope-side locking part 141 of the rope 140 described later. By setting it to this size, when the rope 140 is pulled, the rope-side locking part 141 engages with the rope through hole 122a on the reel side. Therefore, when the reel 120 is rotated to wind up the rope 140, it is possible to prevent the winding position of the rope 140 from shifting or the rope 140 from spinning freely.

[0099] like Figure 3 As shown in (b), on the side of the second reel-side cylindrical portion 124, which protrudes upward from the center of the first reel-side flange portion 121, two slits 124c are provided at opposite positions (180 degrees apart). By providing such slits 124c, the second reel-side cylindrical portion 124 can be elastically deformed in the radial direction.

[0100] like Figure 4 As shown in (b), the second reel-side locking portions 124a and 124b, which are provided at the upper end of the second reel-side cylindrical portion 124 and extend to the outer and inner peripheral sides of the second reel-side cylindrical portion 124, are configured to engage with the flat portion 111 of the cover 110 and the second cover-side locking portion 115a provided at the second cover-side protrusion 115, respectively.

[0101] Specifically, since the outer diameter of the second reel-side cylindrical portion 124 is approximately the same as the diameter of the first cover-side opening 111a, the second reel-side locking portion 124a extending to the outer periphery of the second reel-side cylindrical portion 124 can engage with the flat portion 111 at the location where the second cover-side opening 114a is provided. Furthermore, since the diameter of the hole through which the second cover-side protrusion 115 passes, formed by the second reel-side locking portion 124b extending to the inner periphery of the second reel-side cylindrical portion 124, is approximately the same as the outer diameter of the second cover-side protrusion 115, the second reel-side locking portion 124b can engage with the second cover-side locking portion 115a.

[0102] (Base 130)

[0103] Similar to cover 110, base 130 is formed using thermoplastic resins such as polyamide, polyacetal, polypropylene, polyethylene terephthalate, polyethylene, and ABS. Figure 2 As shown, it is composed of a base side flange portion 131, a base side protrusion portion 132 provided on the upper surface of the base side flange portion 131 and protruding upward, a claw 132a provided on the inner peripheral surface of the base side protrusion portion 132, a base side rope through hole 132b provided on the side of the base side protrusion portion 132, and an anti-detachment portion 132c provided on the inner peripheral surface of the base side protrusion portion 132.

[0104] like Figure 2 As shown, the protrusion 132 on the base side is generally in a circular shape.

[0105] Furthermore, the inner diameter of the base-side protrusion 132 is configured to be larger than the diameter of the second reel-side flange 123, so as to accommodate the second reel-side flange 123 of the reel 120.

[0106] like Figure 2 As shown, the base side protrusion 132 has an anti-detachment part 132c on its inner peripheral surface, which is shaped like the end of the upper surface of the second reel side flange 123 that is housed therein. Thus, the housed second reel side flange 123 can be prevented from detaching with a simple structure.

[0107] like Figure 2 As shown, there are two anti-detachment parts 132c in opposite positions (180 degrees apart), but their number can be adjusted appropriately according to the configuration and size of the claw 132a and the base side rope through hole 132b.

[0108] like Figure 2 As shown, the base-side protrusion 132 forms a claw 132a in the form of a curved inner circumferential surface.

[0109] Furthermore, a circumferentially extending slit 132d is provided on the inner circumferential surface at the location where the claw 132a is located. With this structure, the claw 132a can easily undergo elastic deformation in the radial direction.

[0110] like Figure 2 As shown, there are two claws 132a in opposite positions (180 degrees apart), but their number can be adjusted appropriately according to the configuration and size of the anti-slip part 132c and the base side rope through hole 132b.

[0111] The claw 132a is configured to engage with the ratchet 112b of the cover 110.

[0112] Furthermore, the pawl 132a is formed to match the concave-convex shape of the ratchet 112b. For example, if the concave-convex shape of the ratchet 112b is large, it is preferable that the pawl 132a is configured to protrude further inward to match the concave-convex shape. Thus, the resistance generated when rotating the cover 110 can be adjusted using the pawl 132a and the ratchet 112b.

[0113] like Figure 2 As shown, the base-side protrusion 132 has two base-side rope through holes 132b arranged in opposite positions (separated by 180 degrees).

[0114] The configuration of the base side rope through hole 132b is not limited to the opposite form, but considering the ease of communication with the reel side rope through hole 122a of the reel 120, the opposite form is preferred.

[0115] The number of base side rope through holes 132b is not limited to two, but considering the ease of communication with the reel side rope through holes 122a of the reel 120, two are preferred.

[0116] (Rope 140)

[0117] like Figure 4 As shown in (b), a rope side locking part 141 is formed near the center or end of the rope 140.

[0118] The rope-side locking part 141 is larger than the reel-side rope through hole 122a of the reel 120. By setting it to this size, it is possible to make the rope-side locking part 141 difficult to detach from the first reel-side cylindrical part 122 after it is installed inside the first reel-side cylindrical part 122.

[0119] Because of this structure, when the reel 120 is rotated to wind up the rope 140, it is possible to prevent the winding position of the rope 140 from shifting or the rope 140 from spinning freely.

[0120] (Assembly method of fastening device 100)

[0121] This describes the assembly method of the fastening device 100.

[0122] First, the rope 140 is passed through the rope through hole 122a on the reel side and the rope through hole 132b on the base side. Then, the reel 120 is pressed in from the upper side to the lower side within the base side protrusion 132 of the base 130 until the second reel side flange 123 engages with the anti-detachment portion 132c of the base 130. Next, the cover 110 is pressed in from the upper side to the lower side so that the second cover side protrusion 115 enters the second reel side cylindrical portion 124 of the reel 120, thereby completing the assembly.

[0123] like Figure 2 As shown, the anti-detachment part 132c of the base 130 has a conical surface on its upper surface that is inclined downward toward the inner circumferential surface. Therefore, when the reel 120 is pressed in from the upper side to the lower side in the vertical direction, the second reel side flange 123 is guided downward, and the anti-detachment part 132c elastically deforms radially outward.

[0124] Therefore, when the second reel side flange 123 reaches Figure 4 When the device is in the position shown in (b) (unlocked position), the anti-detachment portion 132c, which elastically deforms radially outward, returns to its original shape and contacts the end of the second reel side flange portion 123, thereby producing a clicking sound. Thus, the user or manufacturer of the fastening device 100 can also know by sound that the second reel side flange portion 123 is fixed to the base 130.

[0125] The second reel-side cylindrical portion 124 of the reel 120 has a slit 124c, and the outer diameter of the second reel-side locking portion 124a extending outward is larger than the inner diameter of the first cover-side opening 111a of the cover 110. Therefore, when the cover 110 is pressed from the upper side to the lower side in a manner that the second cover-side protrusion 115 of the cover 110 enters the second reel-side cylindrical portion 124, the second reel-side locking portion 124a extending outward is pressed by the first cover-side opening 111a of the cover 110, and the second reel-side cylindrical portion 124 elastically deforms radially inward.

[0126] Therefore, at the flat part 111 Figure 4 When the device is in the position shown in (b) (unlocked position), the second reel-side cylindrical portion 124, which has been elastically deformed radially inward, returns to its original shape and contacts the end of the flat portion 111, thereby producing a clicking sound. Thus, the user or manufacturer of the fastening device 100 can also confirm that the cover 110 is secured by sound. Figure 4 The situation shown in (b) (unlocked position).

[0127] When the cover 110 is removed Figure 4 When the position shown in (b) (unlocked position) is pressed further downward, the second reel-side locking part 124b extending inward is pressed by the second cover-side locking part 115a of the cover 110, thereby causing the second reel-side cylindrical part 124 to elastically deform radially outward.

[0128] Therefore, the second cover side locking part 115a reaches Figure 6 When in the position shown in (b) (locked position), the second reel-side cylindrical portion 124, which has been elastically deformed radially outward, returns to its original shape and contacts the outer peripheral surface of the second cover-side protrusion 115, thereby producing a clicking sound. Thus, the user or manufacturer of the fastening device 100 can also use the sound to confirm that the cover 110 is secured. Figure 6 The case shown in (b) (locked position).

[0129] like Figure 5 As shown in (b), the structure is such that the concave-convex shape of the ratchet 112b of the cover 110 is larger in size than the concave-convex shape of the first cover-side locking part 112a, and the size of the claw 132a of the base 130 is larger than the size of the first reel-side locking part 121a.

[0130] Because of this structure, when assembling the fastening device 100, the concave and convex shapes of the first cover-side locking part 112a and the first reel-side locking part 121a are relatively small, making it easier for them to engage. Furthermore, when the cover 110 is rotated to wind up the rope 140, the concave and convex shapes of the ratchet 112b and the pawl 132a are relatively large, resulting in greater resistance in the rotational direction and making it less likely for the rope 140 to slack off naturally.

[0131] (Method for unlocking the fastening device 100)

[0132] The method of using the fastening device 100, especially the method of using the fastening device 100 from Figure 6 The position shown in (b) (locked position) is towards Figure 4 The method of moving the position (unlocked position) shown in (b) (unlocked method) will be explained.

[0133] The unlocking method is simply to use the operating part 113 of the cover 110 to lift the cover 110 upward relative to the reel 120 and the base 130.

[0134] When the cover 110 is lifted upward relative to the reel 120 and the base 130 from the locked position, the engagement between the pawl 132a of the base 130 and the ratchet 112b of the cover 110, as well as the engagement between the first cover-side locking part 112a and the first reel-side locking part 121a, are disengaged, and the reel 120 becomes an unlocked position that can rotate freely.

[0135] In the unlocked position, if the rope 140 extending from the fastening device 100 is pulled from both sides of the fastening device 100, the rope 140 can be released.

[0136] Furthermore, since there is a certain frictional force between the second reel-side locking part 124b extending inward and the second cover-side protrusion 115, the cover 110 can be rotated in the direction of releasing the rope 140 to release the rope 140 by releasing the lock position.

[0137] When the fastening device 100 is in the unlocked position, such as Figure 4 As shown in (b), the lower part of the second reel-side locking part 124a on the outer periphery engages with the upper part of the flat part 111 of the cover 110, and the upper part of the second reel-side locking part 124b on the inner periphery engages with the lower part of the second cover-side locking part 115a of the cover 110.

[0138] Therefore, the fastening device 100 can maintain the unlocked position when it is in the unlocked position.

[0139] exist Figure 4In the embodiment shown in (b), when in the unlocked position, the pawl 132a of the base 130 disengages from the ratchet 112b of the cover 110, but it is also possible to keep the two engaged.

[0140] For example, by making the upward protrusion of the base side protrusion 132 and the claw 132a greater than that of the first reel side flange 121, the engagement of the claw 132a with the ratchet 112b can be prevented from disengaging.

[0141] Furthermore, when the base 130's pawl 132a and the cover 110's ratchet 112b are engaged in the unlocked position, the cover 110 is supported not only at the central portion (part of the second cover side protrusion 115) but also at the outer periphery (part of the ratchet 112b) when unlocked. Therefore, it also has the advantage that the cover 110 is kept stable and it is easy to operate from the unlocked position to the locked position.

[0142] (Locking method of fastening device 100)

[0143] The method of using the fastening device 100, especially the method of using the fastening device 100 from Figure 4 The position shown in (b) (unlocked position) is towards Figure 6 The method of moving the position (locked position) shown in (b) (locking method) will be explained.

[0144] The locking method simply involves pressing the cover 110 downward relative to the reel 120 and the base 130.

[0145] When the cover 110 is pressed downward relative to the reel 120 and the base 130, the pawl 132a of the base 130 engages with the ratchet 112b of the cover 110, and the first cover-side locking part 112a engages with the first reel-side locking part 121a, so that the reel 120 is in a locked position that can rotate only in one direction determined by the pawl 132a and the ratchet 112b.

[0146] In this state, if the cover 110 is rotated in a determined direction, the rope 140 can be tightened.

[0147] When the fastening device 100 is in the locked position, such as Figure 6 As shown in (b), the lower part of the second reel-side locking part 124b extending to the inner periphery of the reel 120 engages with the upper part of the second cover-side locking part 115a of the cover 110.

[0148] Therefore, when the fastening device 100 is in the locked position, it can maintain the locked position.

[0149] <Second Implementation>

[0150] Reference Figures 8 to 14 This describes the second embodiment of the present invention.

[0151] The fastening device 200 consists of a cover 210, a reel 220, a base 230, a rope 240, and a shaft 250.

[0152] Furthermore, descriptions of structures that are the same as or identical to those in the first embodiment are omitted.

[0153] Figure 8 This is a diagram showing the state of the fastening device 200 after it has been assembled.

[0154] (Cover 210)

[0155] like Figure 9 and Figure 10 As shown in (b), the cover 210 differs from the first embodiment mainly in the following aspects: it has a generally circular second cover-side engaging portion 214 on the inner circumferential surface of the first cover-side opening 211a, which is capable of radial elastic deformation and has a second cover-side opening 214a at its center; it has an annular guide portion 215 on the upper surface of the planar portion 211; and it does not have a cover-side cylindrical portion 114.

[0156] The structure and function of the first cover-side protrusion 212 and the operation part 213 are the same as those of the components with the same name in the first embodiment, so the description is omitted.

[0157] like Figure 11 As shown in (b), the second cover-side engaging portion 214 allows the shaft-side protrusion 252 of the shaft 250 (described later) to enter and engages with the shaft-side locking portion 252a.

[0158] like Figure 11 As shown in (b), the guide portion 215 can guide the vertical movement of the shaft side flange portion 251 of the shaft 250, which will be described later.

[0159] (Reel 220)

[0160] like Figure 9 , Figure 10 (c) and Figure 11 As shown in (b), the reel 220 differs from the first embodiment mainly in the following aspects: it has a reel-side protrusion 222b protruding inward on the inner circumferential surface of the first reel-side cylindrical portion 222, a second reel-side opening 221c communicating with the first reel-side opening 221b located at the center of the first reel-side flange portion 221, and does not have a second reel-side cylindrical portion 124.

[0161] The structure and function of the first reel side flange 221 and the second reel side flange 223 are the same as those of the components with the same name in the first embodiment, so the description is omitted.

[0162] like Figure 11 As shown in (b), the reel-side protrusion 222b allows the small-diameter portion 252b of the shaft 250 (described later) to enter and engages with the shaft-side protrusion 252.

[0163] Although not shown in the figure, the second reel side opening 221c houses the rope-side locking part 241 of the rope 240.

[0164] (Base 230)

[0165] like Figure 9 and Figure 13 As shown in (b), the base 230 differs from the first embodiment mainly in the following aspects: it has a second base side protrusion 233 protruding upward in the center of the base side flange 231, the second base side protrusion 233 has a screw through hole 233a, and it does not have an anti-detachment part 132c.

[0166] The structure and function of the base side flange 231 and the base side protrusion 232 are the same as those of the components with the same name in the first embodiment, so the description is omitted.

[0167] The second base side protrusion 233 is circular in shape, such as Figure 13 As shown in (b), its diameter is approximately the same as the inner diameter of the first reel-side opening 221b of the reel 220.

[0168] Furthermore, the screw through hole 233a is connected to the screw hole of the shaft 250, which will be described later.

[0169] (Rope 240)

[0170] Rope 240 is the same as the component with the same name in the first embodiment, so its description is omitted.

[0171] (Axis 250)

[0172] Shaft 250 is formed using thermoplastic resins such as polyamide, polyacetal, polypropylene, polyethylene terephthalate, polyethylene, and ABS. Figure 10 (a) and Figure 11 As shown in (b), it is composed of a axial flange portion 251, a downwardly protruding axial protrusion portion 252 located at the center of the lower surface of the axial flange portion 251, an axial locking portion 252a located on the outer peripheral surface of the axial protrusion portion 252, a small diameter portion 252b located at a position lower than the axial locking portion 252a, and a screw hole 252d located at the center of the lower end of the axial protrusion portion 252.

[0173] like Figure 9 As shown, the axial flange portion 251 is circular in shape.

[0174] like Figure 11 As shown in (b), the axial protrusion 252 can enter the second cover-side opening 214a of the cover 210 and the first reel-side opening 221b of the reel 220, and the axial locking part 252a engages with the second cover-side engaging part 214.

[0175] like Figure 11 As shown in (b), the outer diameter of the small diameter portion 252b is approximately the same as the inner diameter of the reel-side protrusion 222b of the reel 220.

[0176] like Figure 11 As shown in (b), the screw hole 252d is connected to the screw through hole 233a of the base 230.

[0177] (Assembly method of fastening device 200)

[0178] This describes the assembly method of the fastening device 200.

[0179] First, the rope 240 is passed through the rope through hole 222a on the reel side and the rope through hole 232b on the base side. Then, the reel 220 is placed inside the base side protrusion 232 of the base 230, and the cover 210 is placed on the reel 220 in such a way that the second cover side opening 214a communicates with the first reel side opening 221b of the reel 220.

[0180] Then, the axial protrusion 252 of the shaft 250 is made to pass through the second cover-side opening 214a and the first reel-side opening 221b.

[0181] Then, the screw 260 and the screw hole 252d of the shaft 250 are threaded together through the screw through hole 233a of the base 230, thereby completing the assembly.

[0182] The entire fastening device 200 is fixed by screws 260, thus enabling a more robust structure.

[0183] (Method for unlocking the fastening device 200)

[0184] The method of using the fastening device 200, especially the method of using the fastening device 200 from Figure 13 The position shown in (b) (locked position) is towards Figure 11 The method of moving the position (unlocked position) shown in (b) (unlocked method) will be explained.

[0185] The unlocking method is simply to use the operating part 213 of the cover 210 to lift the cover 210 upward relative to the reel 220 and the base 230.

[0186] When the cover 210 is lifted upward relative to the reel 220 and the base 230 from the locked position, the engagement between the pawl 232a of the base 230 and the ratchet 212b of the cover 210, as well as the engagement between the first cover-side locking part 212a and the first reel-side locking part 221a, is disengaged, and the reel 220 becomes an unlocked position that can rotate freely.

[0187] In the unlocked position, if the rope 240 extending from the fastening device 200 is pulled from both sides of the fastening device 200, the rope 240 can be released.

[0188] When the fastening device 200 is in the unlocked position, such as Figure 11 As shown in (b), the lower part of the second cover-side engaging part 214 of the cover 210 engages with the upper part of the shaft-side engaging part 252a.

[0189] Therefore, the fastening device 200 can maintain the unlocked position when it is in the unlocked position.

[0190] (Locking method of fastening device 200)

[0191] The method of using the fastening device 200, especially the method of using the fastening device 200 from Figure 11 The position shown in (b) (unlocked position) is towards Figure 13 The method of moving the position (locked position) shown in (b) (locking method) will be explained.

[0192] The locking method simply involves pressing the cover 210 downward relative to the reel 220 and the base 230.

[0193] When the cover 210 is pressed downward relative to the reel 220 and the base 230, the pawl 232a of the base 230 engages with the ratchet 212b of the cover 210, and the first cover-side locking part 212a engages with the first reel-side locking part 221a, so that the reel 220 is in a locked position that can rotate only in one direction determined by the pawl 232a and the ratchet 212b.

[0194] In this state, if the cover 210 is rotated in a determined direction, the rope 240 can be tightened.

[0195] When the fastening device 200 is in the locked position, such as Figure 13 As shown in (b), the upper part of the second cover-side engaging part 214 engages with the lower part of the shaft-side engaging part 252a.

[0196] Therefore, when the fastening device 200 is in the locked position, it can maintain the locked position.

[0197] Because of the structure described above, this invention provides a fastening device that, compared to conventional synthetic resin fastening devices, allows the device to be thinner in the vertical direction, reducing the possibility of it getting caught on other components, and also reduces the number of parts, thus lowering manufacturing costs.

[0198] The application of this fastening device is not particularly limited; for example, it can be used for safety shoes, children's shoes, sports shoes, high-top shoes, etc. Furthermore, it is not limited to shoes; it can also be used for drawstrings around the waist of clothing.

[0199] Furthermore, this utility model is not limited to the above-described embodiments. As for technologies that are substantially the same as the technical matters described in the embodiments of this utility model or that have the same effect, technologies known to those skilled in the art can also be appropriately utilized, or used as alternative technologies or added to them.

Claims

1. A fastening device, characterized in that, The fastening device includes: The cover has a flat portion, a first cover-side protrusion provided on the lower surface of the flat portion and protruding downward, a first cover-side locking portion provided on the inner peripheral surface of the first cover-side protrusion, and a ratchet provided on the outer peripheral surface of the first cover-side protrusion; A reel having a first reel-side flange portion having a first reel-side locking portion on its outer peripheral surface, a first reel-side cylindrical portion provided on the lower surface of the first reel-side flange portion and protruding downward, and a second reel-side flange portion provided at the lower end of the first reel-side cylindrical portion. The base has a base side flange, a base side protrusion provided on the upper surface of the base side flange and protruding upward, and a claw provided on the inner peripheral surface of the base side protrusion. The reel is located on the inner circumference of the protrusion on the base side. The first cover-side protrusion is located on the inner circumference of the base-side protrusion and on the outer circumference of the first reel-side flange. The ratchet engages with the pawl, and the first cover-side locking part engages with the first reel-side locking part.

2. The fastening device according to claim 1, characterized in that, The cover is configured to move upward relative to the reel and the base. As the cover moves upward, the engagement between the first cover-side locking part and the first reel-side locking part disengages.

3. The fastening device according to claim 1 or 2, characterized in that, The first cover-side locking part is configured with a concave-convex shape on the entire inner circumferential surface of the first cover-side protrusion. The ratchet is configured with a concave-convex shape on the entire outer peripheral surface of the protrusion on the first cover side. The concave-convex shape of the ratchet is larger in size than the concave-convex shape of the first cover side locking part. The claw is larger in size than the first reel side locking part.

4. The fastening device according to claim 1 or 2, characterized in that, The first reel side locking part is provided on the outer peripheral surface of the first reel side flange part at a period of 90 degrees.

5. The fastening device according to claim 1 or 2, characterized in that, As the cover moves upward, the pawl disengages from the ratchet.

6. The fastening device according to claim 1 or 2, characterized in that, The reel has a second reel-side cylindrical portion protruding upward from the center of the first reel-side flange portion, and a second reel-side locking portion located at the upper end of the second reel-side cylindrical portion and extending towards the outer and inner circumferential sides of the second reel-side cylindrical portion. The cover has a cover-side cylindrical portion that protrudes upward from the center of the planar portion and has an upper end portion, a second cover-side protrusion that protrudes downward from the center of the lower surface of the upper end portion, and a second cover-side locking portion provided on the outer peripheral surface of the second cover-side protrusion. When the first cover-side locking part engages with the first reel-side locking part, the second reel-side locking part engages with the upper part of the second cover-side locking part. When the cover moves upward and the engagement of the first cover-side locking part with the first reel-side locking part disengages, the second reel-side locking part on the outer periphery engages with the planar part, and the second reel-side locking part on the inner periphery engages with the lower part of the second cover-side locking part.

7. The fastening device according to claim 1 or 2, characterized in that, The base has an anti-detachment part provided on the inner circumferential surface of the side protrusion of the base. The second reel side flange is fixed relative to the base by means of the anti-detachment part.

8. The fastening device according to claim 1 or 2, characterized in that, The fastening device further includes a shaft, which has a shaft-side flange, a downwardly projecting shaft-side protrusion located at the center of the lower surface of the shaft-side flange, and a shaft-side locking portion located on the outer peripheral surface of the shaft-side protrusion. The cover has a generally circular second cover-side engaging portion at the center of the planar portion. This second cover-side engaging portion is capable of radial elastic deformation and has a second cover-side opening at its center. When the first cover-side locking part engages with the first reel-side locking part, the second cover-side locking part engages with the lower end of the shaft-side locking part. When the cover moves upward and the engagement of the first cover-side locking part with the first reel-side locking part disengages, the second cover-side locking part engages with the upper end of the shaft-side locking part.

9. The fastening device according to claim 8, characterized in that, The shaft has a smaller diameter portion located below the shaft-side locking portion, and a screw hole is located at the center of the lower end of the shaft-side protrusion. The reel has a reel-side protrusion that protrudes inwardly onto the inner circumferential surface of the cylindrical portion on the first reel side. The base has a screw through hole in the center of the side flange portion of the base. With the small diameter portion positioned at the protrusion on the reel side, the screw is threaded into the screw hole via the screw through hole.

Images