CN216674912U

CN216674912U - Shoelace tightness adjusting device

Info

Publication number: CN216674912U
Application number: CN202123160716.2U
Authority: CN
Inventors: 陈清自
Original assignee: Jinjiang Shoe Edge Shoe Material Co ltd
Current assignee: Jinjiang Shoe Edge Shoe Material Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-07
Anticipated expiration: 2031-12-15

Abstract

The utility model relates to the technical field of shoelace tightness adjustment, in particular to a shoelace tightness adjusting device which comprises a base, a chassis, a wire take-up wheel, a buckle sheet for fixing the wire take-up wheel at the bottom of the chassis, a ratchet disc arranged at the top of the chassis, a driving piece arranged in the middle of the ratchet disc and a buckle cover buckled with the top of the chassis, wherein the buckle cover is reversely rotated, after a buckle block in a rotating disc rotates to the limit position of the other side, the bottom of the rotating disc drives the driving disc to ascend through a spiral column, a ratchet hole of the driving disc in the ratchet disc ascends to be separated from a second driving tooth of the wire take-up wheel, the wire take-up wheel can freely rotate in the chassis to pull two ends of an outer wire outwards to adjust and loosen the outer wire, the shoelace can be adjusted by easily rotating the buckle cover by children when the structure is used, the problem that the shoelace is difficult to pull up the buckle cover due to small strength of the children is solved, and the traditional shoelace tightness adjusting device needs adults to assist in pulling up the spiral cover upwards, the technical problem of inconvenient use for children.

Description

Shoelace tightness adjusting device

Technical Field

The utility model relates to the technical field of shoelace tightness adjustment, in particular to a shoelace tightness adjusting device.

Background

At present, the chinese patent application No.: CN201620364850.4 discloses a rotary quick shoelace tying device, which comprises a base, a reel, a clutch fastener, a pulley groove, a pawl pulley and a rotary cover, wherein the base is fixedly arranged on a shoe upper, and the base is provided with a first through hole; the reel is movably arranged on the base, and first one-way ratchets are distributed on the inner periphery of the top end of the reel; the supporting pin of the clutch fastener is positioned in a cavity formed by the winding wheel; the wire wheel groove penetrates through the supporting pin and is arranged in the winding wheel, and the top end of the wire wheel groove is provided with a second one-way ratchet; the pawl wheel also passes through the supporting pin and is positioned in the reel, the pawl wheel is connected with the wire wheel groove in a meshing manner, a one-way pawl matched with the first one-way ratchet is arranged on the periphery of the pawl wheel, an inner groove is also arranged in the middle of the pawl wheel, and the screw cover is movably arranged on the reel;

traditional shoelace tightness adjusting device needs certain pulling force to pull up the spiral cover, and adult uses down can easily pull up, but when children used, children's strength is difficult for pulling up the spiral cover for a short time, leads to traditional shoelace tightness adjusting device to need adult's supplementary upwards to pull up the spiral cover, and children of not being convenient for use.

SUMMERY OF THE UTILITY MODEL

Therefore, aiming at the problems, the utility model provides a shoelace tightness adjusting device, which solves the technical problems that the traditional shoelace tightness adjusting device needs adults to assist in pulling up a spiral cover and is inconvenient for children to use because children have small strength and are not easy to pull up the spiral cover.

In order to achieve the purpose, the utility model adopts the following technical scheme: a shoelace tightness adjusting device comprises a base, a chassis, a take-up pulley, a buckle sheet, a ratchet disc, a driving piece and a buckle cover, wherein the chassis is detachably arranged at the top end of the base, the take-up pulley is rotatably arranged between the chassis and the base, the buckle sheet is used for fixing the take-up pulley at the bottom of the chassis, the ratchet disc is arranged at the top of the chassis, the driving piece is arranged in the middle of the ratchet disc, the buckle cover is buckled with the top of the chassis, a snap ring is arranged in the middle of the outer side of the chassis, a cover buckling part buckled with the snap ring is arranged on the inner side of the bottom of the buckle cover, a separating ring is arranged in the middle of the chassis, ratchets are arranged on the inner ring of the top of the chassis, the ratchet disc is arranged at the top of the separating ring, a plurality of pawls are arranged on the outer side surface of the ratchet disc and are meshed with the ratchets of the inner ring of the ratchet disc, a ratchet hole is clamped into the driving piece is arranged in the middle of the ratchet disc, and second driving teeth are arranged on the take-up pulley;

the driving part comprises a driving disc, a first driving tooth and a spiral hole, the driving disc is arranged in the ratchet hole in a sliding connection mode, the first driving tooth is used for driving the take-up pulley to rotate, the spiral hole is formed in the middle of the driving part, the first driving tooth at the bottom of the driving disc penetrates through the separating ring to be meshed with the second driving tooth of the ratchet disc, a rotating part is arranged in the buckle cover and comprises a rotating disc, a spiral column, a buckle block and a guide groove, the rotating disc is arranged in the buckle cover, the spiral column is arranged in the middle of the rotating disc and is screwed with the spiral hole of the driving disc, the buckle block is arranged on the rotating disc, and the guide groove is arranged in the rotating disc.

Furthermore, a guide convex part is arranged on one end face, close to the buckle cover, of the ratchet plate, an elastic strip is arranged at the position, located on the guide groove, of the rotating plate, a guide channel is formed between the elastic strip and the guide groove at intervals, the end face, far away from the ratchet plate, of the guide convex part is in sliding connection with the guide channel, the guide convex part is gradually enlarged from one side to the other side, and a clamping edge is arranged at the position, close to the end part of the elastic strip, of the guide channel.

Furthermore, a convex ring is arranged on the top end face of the base, two convex blocks are arranged on the outer side of the base plate, through holes used for penetrating through the inner portion of the base plate are formed in the convex blocks, grooves used for avoiding the convex blocks are formed in the convex ring, a disc buckling portion is arranged on the outer side of the base plate, and a disc buckling groove is formed in the base.

Furthermore, the outer side of the buckle piece is provided with two protruding pieces, the bottom of the chassis is provided with a clamping hole for the protruding pieces to be clamped in, the outer side of the buckle piece is provided with an extending part perpendicular to the protruding pieces, and the bottom of the chassis is provided with a concave part for the extending part to be inserted into.

Furthermore, an anti-slip rubber layer is arranged on one end face, far away from the rotating part, of the buckle cover.

Furthermore, a decorative sheet is arranged on one end face, away from the ratchet disc, of the buckle cover.

By adopting the technical scheme, the utility model has the beneficial effects that:

the shoelace tightness adjusting device is characterized in that the buckle cover is reversely rotated through the arrangement of the rotating piece, when the external shoelace needs to be loosened, the pawl outside the ratchet disc is meshed with the ratchet of the chassis, the ratchet disc is not driven to rotate in the reverse rotation process of the buckle cover, the buckle cover reversely rotates, after the buckle block in the rotating disc rotates to the limit position of the other side, the bottom of the rotating disc drives the driving disc to ascend through the spiral column, the ratchet hole of the driving disc in the ratchet disc ascends to be separated from the second driving tooth of the take-up pulley, at the moment, the take-up pulley can freely rotate in the chassis, the external shoelace is outwards pulled close to the head end and the tail end of the shoelace tightness adjusting device, the external shoelace can be loosened through rotating the buckle cover, labor is not wasted during use, children can easily rotate the buckle cover to adjust the shoelace, the problem that the children are hard to pull up the spiral cover is solved, and the traditional shoelace tightness adjusting device needs adults to assist in pulling up the spiral cover upwards, the technical problem of inconvenient use for children.

Furthermore, when the outer line needs to be tightened, the guide convex part rotates to the blocking edge part of the guide channel towards the other side, and the elastic strip is buckled with the other side of the guide convex part, so that the ratchet disc can be prevented from reversely rotating under the action of large force, and the outer line is prevented from loosening; when external lines need to be loosened, the guide convex parts are separated from the elastic strips and the clamping edges, a click prompt sound is sent out, the shoelace can be loosened after the reverse rotation is continued to the extreme position, and the click prompt sound is more convenient for a user to judge whether the reverse rotation is successful or not and to loosen the shoelace or not.

Furthermore, the arrangement of the convex ring is that the bottom of the chassis is inserted into the convex ring of the base, the chassis is buckled with the disc buckling groove on the convex ring through the disc buckling part, and the convex ring is provided with a groove to avoid the convex block, so that in the rotating process of the take-up pulley, the external wire is drawn into the take-up pulley through the through hole on the convex block, and the take-up pulley is convenient to take up the wire.

Further, the setting of lug, when the take-up pulley needs further fixed, put into the chassis with the take-up pulley earlier, go into the card downthehole with the lug card of cramp after accomplishing again, press the extension of cramp to the concave part in again to accomplish fixedly to the take-up pulley, avoid the take-up pulley too not hard up, influence rotation fluency.

Furthermore, the buckle cover of the plastic part has the defect that the surface is smooth and difficult to slide due to the arrangement of the anti-slip rubber layer, so that the friction force between the buckle cover and fingers is increased, and the buckle cover is convenient to slide.

Furthermore, the setting of buckle closure, when needing to change the decorative piece, will decorate the piece from the decorative groove of decorating the piece and scratch out with the finger from the catching groove, change after the completion and decorate the piece and press down to decorating the inslot, decorate the outer buckle in the piece outside and decorate the interior buckle lock at groove top, this fixed structure is firm, is difficult for dropping in the decorative piece motion process to the aesthetic property is good.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the explosive state of the present invention;

FIG. 3 is a schematic view of the partial explosion configuration of the present invention;

FIG. 4 is a schematic cross-sectional view of the structure of the present invention;

FIG. 5 is a schematic cross-sectional view of the structure of the buckle cover and the decorative sheet of the present invention in use;

FIG. 6 is a schematic top view of the buckle cover structure of the present invention.

Detailed Description

The utility model will now be further described with reference to the drawings and the detailed description.

Referring to fig. 1 to 6, the embodiment provides a shoelace tightness adjusting device, which includes a base 1, a chassis 2 detachably disposed at the top end of the base 1, a take-up pulley 3 rotatably disposed between the chassis 2 and the base 1, a buckle piece 4 for fixing the take-up pulley 3 at the bottom of the chassis 2, a ratchet disc 5 disposed at the top of the chassis 2, a driving member 6 disposed at the middle of the ratchet disc 5, and a buckle cover 7 fastened to the top of the chassis 2;

a snap ring 202 is arranged in the middle of the outer side of the chassis 2, a cover buckling part 701 buckled with the snap ring 202 is arranged on the inner side of the bottom of the buckling cover 7, and the buckling cover 7 is rotatably arranged on the outer side of the chassis 2;

the buckle piece 4 is detachably arranged at the bottom of the chassis 2;

a separating ring 201 is arranged in the middle of the base plate 2, the take-up pulley 3 is arranged at the bottom of the separating ring 201, ratchets 203 are arranged on an inner ring of the top of the base plate 2, the ratchet plate 5 is arranged at the top of the separating ring 201, a plurality of pawls 502 are arranged on the outer side surface of the ratchet plate 5, the pawls 502 and the ratchet plate 5 are arranged at intervals, the pawls 502 are meshed with the ratchets 203 on the inner ring of the ratchet plate 5, a ratchet hole 503 for clamping a driving piece 6 is arranged in the middle of the ratchet plate 5, and second driving teeth 30 are arranged on the take-up pulley 3;

the driving piece 6 comprises a driving disc 601 slidably connected and arranged in the ratchet hole 503, a first driving tooth 602 for driving the take-up pulley 3 to rotate, and a spiral hole 603 arranged in the middle of the driving piece 6;

the first driving tooth 602 at the bottom of the driving disk 601 passes through the separating ring 201 to mesh with the second driving tooth 301 of the ratchet disk 5;

a rotating part 8 is arranged in the buckle cover 7, the rotating part 8 comprises a rotating disk 81 arranged in the buckle cover 7, a spiral column 82 arranged in the middle of the rotating disk 81 and screwed with a spiral hole 603 of the driving disk 601, a buckle block 83 arranged on the rotating disk 81 and a guide groove 84 arranged in the rotating disk 81, and the thickness of the driving disk 601 is smaller than the depth of the ratchet hole 503;

a buckle groove 504 for buckling the buckle block 83 is arranged at a position of the pawl 502 spaced from the ratchet disc 5, and the buckle groove 504 is arranged on an end surface of the ratchet disc 5 far away from the buckle cover 7.

The driving disk 601 can move up and down in the ratchet hole 503; when the tightness adjusting device needs to be tightened, the buckle cover 7 is rotated clockwise, the buckle block 83 slides to the limit position from the other side of the buckle groove 504 to one side, the ratchet disc 5 can be driven to rotate clockwise in the ratchet 203 of the chassis 2, meanwhile, the spiral column 82 is screwed through the spiral hole 603 in the clockwise rotation process of the buckle cover 7 to drive the driving disc 601 to move downwards to be meshed with the take-up pulley 3, the first driving tooth 602 on the bottom end face of the driving disc 601 is meshed with the second driving tooth of the take-up pulley 3, and the take-up pulley 3 is driven to rotate through the ratchet disc 5 to tighten the external wire of the take-up pulley 3 when the buckle cover rotates;

when the external thread needs to be loosened, the buckle cover 7 is rotated reversely, because the pawl 502 at the outer side of the ratchet plate 5 is meshed with the ratchet teeth 203 of the chassis 2, the buckle cover 7 does not drive the ratchet plate 5 to rotate in the reverse rotation process, the buckle cover 7 rotates reversely, after the buckle block 83 in the rotating disc 81 rotates to the limit position at the other side, the bottom of the rotating disc 81 drives the driving disc 601 to ascend through the spiral column 82, the driving disc 601 ascends in the ratchet hole 503 in the ratchet plate 5 and is separated from the second driving tooth of the take-up pulley 3, at the moment, the take-up pulley 3 can rotate freely in the chassis 2, the external thread is pulled outwards close to the head and tail ends of the tightness adjusting device, the external thread can be loosened by adjusting the tightness by rotating the buckle cover, labor is not wasted when the buckle cover is used, children can easily rotate the buckle cover to adjust the tightness, the problem that the children are difficult to pull up the buckle cover due to small strength is solved, and the traditional tightness adjusting device needs adults to pull up the spiral cover upwards, the technical problem of inconvenient use for children.

The ratchet plate 5 is provided with a guide convex part 501 on one end face close to the buckle cover 7, the rotary disc 81 is provided with an elastic strip 85 at the position of the guide groove 84, the elastic strip 85 and the guide groove 84 form a guide channel 8a at intervals, one end face of the guide convex part 501 far away from the ratchet plate 5 is in sliding connection with the guide channel 8a, the guide convex part 501 is gradually enlarged from one side to the other side, and a clamping edge 8b is arranged at the position of the guide channel 8a close to the end part of the elastic strip.

The guiding convex part 501 rotates to the position of the clamping edge 8b of the guiding channel 8a towards the other side, and the elastic strip 85 is buckled with the other side of the guiding convex part 501; one of the elastic strips 85 is provided with a widened part 8c near the blocking ridge 8b, when the other side of the guiding convex part 501 is buckled, the buckling force is larger, and only one of the widened parts is slightly applied with reverse rotation force, so that the guiding convex part 501 and the blocking ridge 8b can be separated and rotate in the reverse direction, and the widened part is preferably provided, if a plurality of the widened parts are provided, the buckling cover 7 is difficult to reversely rotate.

When the outer line needs to be tightened, the guiding convex part 501 rotates to the blocking edge 8b part of the guiding channel 8a towards the other side, and the elastic strip 85 is buckled with the other side of the guiding convex part 501, so that the ratchet disc 5 can be prevented from reversely rotating under the action of large force, and the outer line is loosened; when the external thread needs to be loosened, the guiding convex part 501 is separated from the elastic strip 85 and the clamping edge 8b, a click prompt sound is sent out, after the reverse rotation is continued to the extreme position, the shoelace can be loosened, and the click prompt sound is more convenient for a user to judge whether the reverse rotation is successful or not and whether the shoelace can be loosened or not.

The base is characterized in that a convex ring 101 is arranged on the top end face of the base 1, two convex blocks 204 are arranged on the outer side of the base plate 2, a through hole 205 used for penetrating through the inner part of the base plate 2 is formed in each convex block 204, an open groove 102 used for avoiding each convex block 204 is formed in each convex ring 101, a disc buckling part 206 is arranged on the outer side of the base plate 2, and a disc buckling groove 103 is formed in the base 1.

The convex ring is arranged, wherein the bottom of the chassis is inserted into the convex ring of the base, the chassis is buckled with the disc buckling groove on the convex ring through the disc buckling part, and the convex ring is provided with a groove to avoid the convex block, so that in the rotating process of the take-up pulley, an external wire is drawn into the take-up pulley through a through hole on the convex block, and the take-up pulley is convenient to take up.

The outer side of the buckle piece 4 is provided with two protruding pieces 41, the bottom of the chassis 2 is provided with a clamping hole 207 for the protruding piece 41 to be clamped in, the outer side of the buckle piece 4 is provided with an extending part 42 perpendicular to the protruding piece 41, and the bottom of the chassis 2 is provided with a concave part 208 for the extending part 42 to be inserted into.

When the take-up pulley needs further to be fixed, put into the chassis with the take-up pulley earlier, in the lug card with the cramp is gone into the card hole again after accomplishing, presses the extension of cramp to the concave part in again to accomplish fixedly to the take-up pulley, avoid the take-up pulley too not hard up, influence rotatory smoothness nature.

The circumference of the inner side surface of the buckling cover is provided with a clamping part 7a for clamping the rotating disc, and the rotating disc is provided with a buckling surface 8d buckled with the clamping part. This facilitates removal of the rotating member from within the retaining cap.

Preferably, the base and the convex ring are integrally formed, the base plate, the separating ring, the clamping ring, the ratchet, the protruding block and the disc buckling part are integrally formed, the buckling piece, the protruding piece and the extending part are integrally formed, the take-up pulley and the second driving tooth are integrally formed, the driving disc and the first driving tooth are integrally formed, and the rotating disc, the spiral column, the buckling block, the elastic strip and the clamping edge are integrally formed, so that the mass production is facilitated.

The buckle cover is far away from rotating member one end face and is equipped with anti-skidding rubber layer 8x, and the buckle cover of working of plastics has the smooth defect that is difficult to the slip in surface wherein, through the setting on anti-skidding rubber layer, increases the frictional force with the finger, makes things convenient for the slip buckle cover.

The buckle closure 7 is kept away from 5 terminal surfaces of ratchet dish and is equipped with and decorates piece 9, decorates the piece and can dismantle with the buckle closure preferentially and be connected, be equipped with the decoration groove 7c that is used for placing the decoration piece on the buckle closure, it is equipped with interior buckle 7a to decorate the groove top, decorate the piece outside and be equipped with the outer buckle 9a with interior buckle lock, be close to on the buckle closure and decorate piece one end and be equipped with the groove 7b of digging out that is used for making things convenient for the decoration piece to take out, when needing to change the decoration piece, will decorate the piece from the buckle groove and dig out from the decoration groove of decorating the piece with the finger, change after accomplishing and decorate the piece and press down to decorating the inslot, the outer buckle in the decoration piece outside and the interior buckle lock at decoration groove top, this fixed in structure is firm, decorates the piece motion in-process and is difficult for dropping to the aesthetic property is good.

The piece of decorating is preferably the metal material, for example iron etc. and the buckle closure is located and decorates inslot middle part and be equipped with first magnet 10, peg graft in the buckle closure middle part in first magnet bottom, first magnet top is pegged graft with the buckle closure, the buckle closure is kept away from first magnet one end and is equipped with a plurality of second magnet 11 that are used for adsorbing the piece of decorating, and the piece of decorating still has the risk that drops in the in-service use process, and stability when being connected for strengthening the piece of decorating with the buckle closure is compromise again simultaneously and is convenient dismantlement nature, increases first magnet and second magnet, will strengthen adsorbing the piece of decorating, makes the piece of decorating more difficult follow the buckle closure and drops.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A shoelace tightness adjusting device is characterized by comprising a base (1), a chassis (2) detachably arranged at the top end of the base (1), a take-up pulley (3) rotatably arranged between the chassis (2) and the base (1), a buckle sheet (4) used for fixing the take-up pulley (3) at the bottom of the chassis (2), a ratchet disc (5) arranged at the top of the chassis (2), a driving piece (6) arranged at the middle part of the ratchet disc (5) and a buckle cover (7) buckled with the top of the chassis (2), wherein the middle part of the outer side of the chassis (2) is provided with a snap ring (202), the inner side of the bottom of the buckle cover (7) is provided with a cover buckling part (701) buckled with the snap ring (202), the middle part of the chassis (2) is provided with a separation ring (201), the take-up pulley (3) is arranged at the bottom of the separation ring (201), an inner ring at the top of the chassis (2) is provided with a ratchet (203), and the ratchet disc (5) is arranged at the top of the separation ring (201), a plurality of pawls (502) are arranged on the outer side surface of the ratchet disc (5), the pawls (502) are meshed with ratchets (203) of the inner ring of the ratchet disc (5), a ratchet hole (503) clamped into the driving piece (6) is formed in the middle of the ratchet disc (5), and second driving teeth (301) are arranged on the take-up pulley (3);

the driving piece (6) comprises a driving disc (601) which is slidably connected and arranged in a ratchet hole (503), a first driving tooth (602) used for driving the take-up pulley (3) to rotate and a spiral hole (603) arranged in the middle of the driving piece (6), the first driving tooth (602) at the bottom of the driving disc (601) penetrates through a separating ring (201) to be meshed with a second driving tooth (301) of the ratchet disc (5), a rotating piece (8) is arranged in the buckle cover (7), the rotating piece (8) comprises a rotating disc (81) arranged in the buckle cover (7), a spiral column (82) arranged in the middle of the rotating disc (81) and screwed with the spiral hole (603) of the driving disc (601), a buckle block (83) arranged on the rotating disc (81) and a guide groove (84) arranged in the rotating disc (81).

2. A shoelace tightness adjusting device as defined in claim 1, further comprising: the ratchet plate is characterized in that a guide convex part (501) is arranged on one end face, close to the buckle cover (7), of the ratchet plate (5), an elastic strip (85) is arranged at the position, located in the guide groove (84), of the rotating disc (81), the elastic strip (85) and the guide groove (84) are separated to form a guide channel (8 a), one end face, far away from the ratchet plate (5), of the guide convex part (501) is connected with the guide channel (8 a) in a sliding mode, the guide convex part (501) is gradually increased from one side to the other side, and a clamping rib (8 b) is arranged at the position, close to the end part of the elastic strip (85), of the guide channel (8 a).

3. A shoelace tightness adjusting device as claimed in claim 1, wherein: the base (1) top end face is equipped with bulge loop (101), the chassis (2) outside is equipped with two lugs (204), be equipped with on lug (204) and be used for passing inside perforation (205) of chassis (2), be equipped with fluting (102) that are used for dodging lug (204) on bulge loop (101), the chassis (2) outside is equipped with dish knot portion (206), be equipped with dish catching groove (103) on base (1).

4. A shoelace tightness adjusting device as claimed in claim 3, wherein: the buckle piece (4) outside is equipped with two lugs (41), bottom is equipped with card hole (207) that are used for lug (41) card to go into on chassis (2), buckle piece (4) outside is equipped with extension (42) with lug (41) perpendicular setting, chassis (2) bottom is equipped with recess (208) that are used for extension (42) to insert.

5. A shoelace tightness adjusting device as claimed in claim 1, wherein: and an anti-slip rubber layer (8 x) is arranged on one end face, far away from the rotating piece (8), of the buckle cover (7).

6. A shoelace tightness adjusting device as defined in claim 1, further comprising: and a decorative sheet (9) is arranged on one end face of the buckle cover (7) far away from the ratchet disc (5).