Lacing device

Abstract

A lacing device, comprising a main body (4), a winding wheel (3) used for winding a lace, an upper cover (6) rotatably arranged on the main body (4), and a ratchet mechanism (5) used for realizing one-way rotation of the upper cover (6). The winding wheel (3) is rotatably arranged in the main body (4); the upper cover (6) and the winding wheel (3) can be connected or separated; the upper cover (6) comprises a cover body (61) and a side wall (62) arranged around the circumference of the cover body (61); there is a first meshing surface (63) on the inner side surface of the side wall (62); two or more slide channels (41) are formed in the upper end surface of the main body (4); the ratchet mechanism (5) comprises two or more sliding blocks (51) sliding along the slide channels (41) and an elastic member (52) used for pushing the sliding blocks (51) to slide towards the outside of the main body (4); and each sliding block (51) is provided with a first ratchet tooth (53) fitted with the first meshing surface (63) to achieve engagement.

Description

A lacing device Technical Field

[0001] The invention relates to the field of lacing twist and tightening, and in particular to a lacing device. Background Art

[0002] At present, Chinese Patent No.: 202320155870.0 discloses a novel lace tightening and loosening knob device and its anti-reverse structure, including a seat body, a wire wheel and a knob. The wire wheel is embedded in the seat body, and the knob is connected to the seat body. The seat body is provided with teeth and grooves; the knob includes a wheel rigid component, and the wheel rigid component is provided with convex teeth. The meshing structure of the teeth and grooves and the convex teeth is a structure that meshes up and down and can be rotated in one direction to prevent reverse rotation. The wire wheel and the knob are provided with a driving structure that can be connected, driven or separated. When the knob moves relative to the seat body, an engaged tightening mode in which the teeth and grooves are engaged with the convex teeth and a free rope loosening mode in which the teeth and grooves are separated from the convex teeth can be achieved.

[0003] Currently, there are many types of tensioning and loosening knobs available on the market. Some have complex structures that are not conducive to development, production, and widespread use. Some have low structural design strength, short service life, and poor tensioning feel. In order to achieve a structure with good structural stability, high strength, and long service life, the applicant has made corresponding improvements to the existing structures.

[0004] Summary of the Invention

[0005] Therefore, in response to the above problems, the present invention proposes a lacing device, which solves the technical problems of the existing lacing devices such as poor stability, low strength and short service life.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a lacing device, comprising: a main body, a winding wheel for winding a lacing, an upper cover rotatably arranged on the main body, and a non-return mechanism for realizing unidirectional rotation of the upper cover, wherein the winding wheel is rotatably arranged in the main body, and the upper cover and the winding wheel can be switched between connection and separation.

[0007] The upper cover includes a cover body and a side wall provided on the periphery of the cover body, wherein the inner side surface of the side wall is provided with a first meshing surface;

[0008] The upper end surface of the main body is provided with two or more sliding channels;

[0009] The anti-return mechanism includes two or more sliders sliding along the sliding channel, and an elastic member for pressing the sliders to slide outward from the main body, and each slider is provided with a first anti-return tooth that cooperates with the first meshing surface to achieve locking;

[0010] When the upper cover is connected to the winding wheel, the first check tooth is engaged with the first meshing surface. When the upper cover rotates forward, the first meshing surface presses the first check tooth, thereby pushing the slider to slide along the sliding channel, and then presses the elastic part to deform, and finally each first check tooth enters the next first meshing surface. When the upper cover rotates reversely, the first check tooth locks the first meshing surface and cannot push the slider to slide along the sliding channel.

[0011] Furthermore, the elastic member is an annular body provided above the main body, each slider is provided on the annular body, and a curved energy storage portion for enhancing elastic performance is provided on the annular body between two adjacent sliders.

[0012] Furthermore, there are three sliders, which are arranged at equal intervals. There is an intersection between the first side line of the slider along the clockwise direction and the main body, and the intersection and the center of the main body form a main body connecting line. The angle formed by the first side line and the main body connecting line is 30° to 60°.

[0013] Furthermore, the sliding channel is composed of two block structures, and the block structure is also provided with a channel buckle body for clamping the slider.

[0014] Furthermore, more than two limit blocks are provided at the lower end of the side wall of the upper cover, and a retaining ring is provided at the upper part of the side of the main body, and the limit block is clamped at the lower end of the retaining ring. A third through hole is provided at the middle of the upper end of the main body, and a transmission disk is clamped at the middle of the upper cover, and a second transmission tooth is provided on the lower end of the transmission disk. A second transmission groove is provided on the upper end surface of the winding wheel. The upper cover realizes the clutch cooperation of the second transmission tooth and the second transmission groove by moving up and down along the main body, thereby realizing the clutch cooperation of the upper cover and the winding wheel, and a limiting structure for limiting the up and down movement position of the upper cover is provided on the main body.

[0015] Furthermore, a first through hole is provided in the middle of the winding wheel, a second through hole is provided in the middle of the transmission disk, the limiting structure includes a base plate and a bayonet provided in the middle of the base plate, the base plate is clamped on the lower end of the main body, the bayonet passes through the first through hole and the second through hole, and a limiting protrusion is provided on the side wall of the upper end of the bayonet. When the upper cover drives the transmission disk to move downward and connect with the winding wheel, the second through hole is clamped at the lower end of the limiting protrusion. When the upper cover drives the transmission disk to move upward and separate from the winding wheel, the second through hole is clamped at the upper end of the limiting protrusion.

[0016] Furthermore, an elastic deformation groove is provided on the middle portion of the bayonet, and when the limiting protrusion passes through the second through hole, the elastic deformation groove is deformed to pass through.

[0017] A lacing device based on the same inventive concept comprises: a main body, a winding wheel for winding a lacing, an upper cover rotatably mounted on the main body, and a back-stop mechanism for achieving unidirectional rotation of the upper cover, wherein the winding wheel is rotatably mounted within the main body, and the upper cover and the winding wheel can be switched between connection and separation, and is characterized in that:

[0018] The upper cover includes a cover body and a side wall provided on the periphery of the cover body, wherein the inner side surface of the side wall is provided with a first meshing surface;

[0019] The upper end surface of the main body is provided with two or more sliding channels;

[0020] The anti-return mechanism includes two or more sliders sliding along the sliding channel, and an elastic member for pressing the sliders to slide outward from the main body, and each slider is provided with a first anti-return tooth that cooperates with the first meshing surface to achieve locking;

[0021] When the upper cover is connected to the winding wheel, the first anti-return tooth is engaged with the first meshing surface. When the upper cover rotates forward, the first meshing surface presses the first anti-return tooth, thereby pushing the slider to slide along the sliding channel, and then presses the elastic member to produce deformation, and finally each first anti-return tooth enters the next first meshing surface. When the upper cover rotates reversely, the first anti-return tooth locks the first meshing surface, and cannot push the slider to slide along the sliding channel.

[0022] The slingshot is moved in a direction of rotation from one end of the slingshot to the other end of the slingshot, the slingshot being moved in a direction of rotation from one end of the slingshot to the other end of the slingshot, the slingshot being moved in a direction of rotation from one end of the slingshot to the other end of the slingshot, the slingshot being moved in a direction of rotation from one end of the slingshot to the other end of the slingshot, the slingshot being moved in a direction of rotation from one end of the slingshot to the other end of the slingshot, the slingshot being moved in a direction of rotation from one end of the slingshot to the other end of the slingshot,

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In this solution, a more stable anti-return mechanism can be provided, which has a higher clamping strength and a longer service life. Particularly, the arrangement of the sliding channel, the slider and the elastic member can realize the cooperation between the first anti-return tooth and the first meshing surface. This cooperation has more restrictions and achieves stronger stability. Particularly, the forward rotation can be clockwise or counterclockwise, which is the direction of rotation when the laces are tightened. Correspondingly, the reverse rotation is the opposite. The channel here is not arranged in a radial direction, but is offset at a certain angle. This offset is to force the slider to quickly enter the sliding channel during forward rotation, and also to ensure that the slider can be effectively clamped during reverse rotation, and to place the slider into the sliding channel. In conventional settings, a deflection angle of 30-60 degrees is optimal.

[0025] 2. To achieve better cost reduction and improved elasticity, the elastic member is an annular body positioned above the main body, with each slider mounted on the annular body. A curved energy storage portion is provided on the annular body between two adjacent sliders to enhance elasticity. The connection between the slider and the annular body can be a small portion, which is more conducive to deformation of the annular body. The curved energy storage portion absorbs and releases deformation energy, which helps extend the service life. In this solution, the annular body, slider, and curved energy storage portion are manufactured using an integrated molding method, using plastic or nylon materials with good deformation recovery properties.

[0026] 3. Through the setting of the channel groove and the channel buckle body, the stable sliding of the slider can be achieved.

[0027] 4. By configuring the transmission disc, the third through-hole, the second transmission tooth, and the second transmission groove, the upper cover can be moved up and down along the main body to achieve clutch engagement between the second transmission tooth and the second transmission groove, thereby achieving clutch engagement between the upper cover and the reel. Furthermore, by configuring the limiting structure, the upper cover can be kept in a stable state during clutch engagement with the reel. Specifically, when the upper cover drives the transmission disc downward to connect with the reel, the second through-hole is positioned at the lower end of the limiting protrusion. When the upper cover drives the transmission disc upward to separate from the reel, the second through-hole is positioned at the upper end of the limiting protrusion. This allows for relatively stable clutch engagement.

[0028] 5. A lacing device based on the same inventive concept has an additional base, and is also provided with a torsion spring and a rotating disk. Through the provision of an elastic sheet and a third transmission groove, it can be achieved that when the upper cover drives the winding wheel to rotate forward, the winding wheel does not drive the rotating disk to rotate, and when it rotates in the reverse direction, it can drive the rotating disk to rotate in the reverse direction. In the lacing tightening mode, the upper cover is connected and matched with the winding wheel. Due to the presence of a non-return mechanism, the upper cover can only rotate forward, thereby driving the winding wheel to tighten the lacing, and stopping the rotation of the lacing locks it. In the lacing loosening mode, the upper cover is disconnected from the winding wheel, and the non-return mechanism is disengaged. The lacing can be pulled out to drive the winding wheel to rotate in the reverse direction, thereby driving the rotating disk to rotate the torsion spring to store energy. When the lacing is released, the torsion spring releases energy, driving the rotating disk to rotate forward, thereby driving the winding wheel to rotate forward. In the loosening mode, partial or complete recovery of the lacing can also be achieved.

[0029] When used on shoes, when the upper cover is disconnected from the reel, the torsion spring still keeps the shoelaces in a semi-tightened state. At this time, the semi-tightened state is not locked, and the shoelaces can be freely extended and retracted, allowing the foot to freely detach from the shoe. When putting on the shoes again, the shoelaces can be stretched and loosened by hand. The stretched shoelaces will automatically retract into the device and can be locked by pressing the button, making it more convenient to lace the shoes, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram of the front three-dimensional structure of the present invention.

[0031] FIG2 is a schematic diagram of the back three-dimensional structure of the present invention.

[0032] FIG3 is a schematic diagram of the three-dimensional structure of the present invention with the cover omitted.

[0033] FIG. 4 is a top view of FIG. 3 .

[0034] FIG5 is a schematic diagram of the exploded structure of FIG1 .

[0035] FIG6 is a schematic diagram of the exploded structure of FIG2 .

[0036] FIG7 is a schematic cross-sectional view of the present invention.

[0037] FIG. 8 is a schematic diagram illustrating the decomposition of forces in FIG. 4 .

[0038] FIG9 is a schematic diagram of an exploded structure of another embodiment of the present invention from a first viewing angle.

[0039] FIG10 is a schematic diagram of an exploded structure of another embodiment of the present invention from a second viewing angle.

[0040] Reference numerals:

[0041] 1. Base; 11. Mounting cavity; 12. Torsion spring; 13. Mounting column;

[0042] 2. Rotating disk; 21. Elastic sheet; 22. Disk wall; 23. Notch; 24. Clamping column;

[0043] 3. Reel; 31. Second transmission slot; 32. First through hole; 33. Third transmission slot; 34. Step portion;

[0044] 4. Main body; 41. Sliding channel; 411. Channel groove; 412. Channel buckle body; 42. Snap ring; 43. Third through hole;

[0045] 5. Anti-return mechanism; 51. Slider; 52. Elastic member; 53. First anti-return tooth; 54. Curved energy storage part;

[0046] 6. Upper cover; 61. Cover body; 62. Side wall; 63. First engaging surface; 64. Limiting block;

[0047] 7. Transmission plate; 71. Second transmission tooth; 72. Second through hole;

[0048] 8. Restriction structure; 81. Bottom plate; 82. Pin; 83. Restriction protrusion; 84. Elastic deformation groove. DETAILED DESCRIPTION

[0049] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0050] 1 to 8 , the first embodiment of the present invention provides a lacing device, comprising a main body 4, a winding wheel 3 for winding a lacing wheel, an upper cover 6 rotatably provided on the main body 4, and a non-return mechanism 5 for achieving unidirectional rotation of the upper cover 6. The winding wheel 3 is rotatably provided in the main body 4, and the upper cover 6 and the winding wheel 3 can be switched between connection and separation. The upper cover 6 includes a cover body 61 and a side wall 62 provided on the periphery of the cover body 61. A first meshing surface 63 is provided on the inner side surface of the side wall 62. More than two sliding channels 41 are provided on the upper end surface of the main body 4.

[0051] The anti-return mechanism 5 includes two or more sliders 51 that slide along the sliding channel 41, and an elastic member 52 for forcing the sliders 51 toward the outside of the main body 4. Each slider 51 is provided with a first anti-return tooth 53 that engages with a first meshing surface 63 to achieve engagement. The elastic member 52 is an annular body disposed above the main body 4. Each slider 51 is mounted on the annular body. A curved energy storage portion 54 is provided on the annular body between adjacent sliders 51 to enhance elasticity. There are three sliders 51. As shown in Figure 4, the first edge line La of the slider extends to form an intersection point Lc with the outer circumference of the main body. The intersection point Lc is connected to the center of the outer circumference of the main body to form a main body connecting line Lb. The angle formed between the first edge line and the main body connecting line is 30° to 60°. This angle is designed to better force the slider into the sliding channel during forward rotation and ensure effective engagement during reverse rotation. In this embodiment, the angle α is set to 45 degrees.

[0052] The sliding channel 41 is composed of two block structures, and the block structure is also provided with a channel buckle body 412 for clamping the slider. In order to achieve better sliding, a channel groove 411 is also provided. Of course, the channel buckle body 412 can be a block or an inverted L-shaped.

[0053] When the upper cover 6 is connected to the winding wheel 3, the first check tooth 53 is engaged with the first meshing surface 63. When the upper cover 6 rotates forward, the first meshing surface 63 presses the first check tooth 53, thereby pushing the slider 51 to slide along the sliding channel 41, and then presses the elastic part 52 to deform, and finally each first check tooth 53 enters the next first meshing surface 63. When the upper cover 6 rotates reversely, the first check tooth 53 locks the first meshing surface 63, and cannot push the slider 51 to slide along the sliding channel 41.

[0054] Referring to Figure 8 again, when the upper cover 6 rotates in the forward direction, the first meshing surface applies a screwing force Fa to the first check tooth of the slider, and the side block of the slider channel forms a reaction force Fb on the first check tooth at its side normal position, which forms an angle β. According to the triangle rule, the synthesis of the two forces, the direction of the resultant force is from the starting point of the first to the end point of the second. Under the influence of this force, an inward resultant force Fc will be generated between them. The direction of this force prompts the slider to retract inward into the channel, and the rotary cover can rotate normally.

[0055] When the upper cover 6 rotates in the reverse direction, the first meshing surface applies a screwing force fd to the first non-return tooth of the slider, and the side block of the slider channel forms a reaction force fe on the first non-return tooth at its side normal position, and forms an angle γ. According to the triangle rule, the two forces are combined, and the direction of the resultant force is from the starting point of the first to the end point of the second. Under the influence of this force, an outward resultant force fh will be generated between them. The direction of this force prompts the slider to slide outward, but is limited by the obstruction of the wall of the first meshing surface. The slider is directly stuck and cannot continue to slide outward, resulting in the upper cover being unable to rotate in the reverse direction, thereby avoiding the accidental loosening of the laces under the action of the loosening force.

[0056] The lower end of the side wall 62 of the upper cover 6 is provided with more than two limit blocks 64, and a snap ring 42 is provided at the upper part of the side surface of the main body 4. The limit block 64 is clamped on the lower end of the snap ring 42, and a third through hole 43 is provided at the middle of the upper end of the main body 4. A transmission disk 7 is clamped at the middle of the upper cover 6, and a second transmission tooth 71 is provided on the lower end of the transmission disk 7. A second transmission groove 31 is provided on the upper end surface of the winding wheel 3. The upper cover 6 realizes the clutch cooperation of the second transmission tooth 71 and the second transmission groove 31 by moving up and down along the main body 4, thereby realizing the clutch cooperation of the upper cover 6 and the winding wheel 3. A limiting structure 8 for limiting the up and down movement position of the upper cover 6 is provided on the main body 4.

[0057] A first through hole 32 is provided in the middle of the reel 3, a second through hole 72 is provided in the middle of the transmission disc 7, and the limiting structure 8 includes a bottom plate 81 and a bayonet 82 provided in the middle of the bottom plate 81. The bottom plate 81 is clamped on the lower end of the main body 4. The bayonet 82 passes through the first through hole 32 and the second through hole 72. A limiting protrusion 83 is provided on the side wall 62 of the upper end of the bayonet 82. When the upper cover 6 drives the transmission disc 7 to move downward and connect with the reel 3, the second through hole 72 is clamped on the lower end of the limiting protrusion 83. When the upper cover 6 drives the transmission disc 7 to move upward and separate from the reel 3, the second through hole 72 is clamped on the upper end of the limiting protrusion 83. An elastic deformation groove 84 is provided in the middle of the bayonet 82. When the limiting protrusion 83 passes through the second through hole 72, the elastic deformation groove 84 is deformed to pass through.

[0058] 9 and 10 , the second embodiment provides a lacing device based on the same inventive concept, which differs from the first embodiment in that:

[0059] The slingshot 2 is a slingshot 20 which is mounted on the slingshot 20 and is adapted to move the slingshot 20 forwards and backwards, and the slingshot 20 is adapted to move the slingshot 20 ...

[0060] A mounting post 13 is provided in the middle of the base 1, and one end of the torsion spring 12 is clamped on the mounting post 13. The mounting post 13 is provided with a clamping fork 14. A disk wall 22 is provided downwardly on the circumferential side of the rotating disk 2. The disk wall 22 is provided with a notch 23 for clamping the torsion spring 12. The notch 23 is provided with a clamping post 24 for clamping the torsion spring 12. The torsion spring 12 is located within the disk wall 22.

[0061] A step portion 34 is provided at the upper end of the winding wheel 3 , and the step portion 34 extends into the third through hole 43 to realize rotation support of the winding wheel 3 .

[0062] The bottom plate 81 of the limiting structure 8 is fixed to the lower end of the winding wheel.

[0063] The beneficial effects of the present invention are:

[0064] 1. In this solution, a more stable anti-return mechanism can be provided, which has a higher clamping strength and a longer service life. Particularly, the arrangement of the sliding channel, the slider and the elastic member can realize the cooperation between the first anti-return tooth and the first meshing surface. This cooperation has more restrictions and achieves stronger stability. Particularly, the forward rotation can be clockwise or counterclockwise, which is the direction of rotation when the laces are tightened. Correspondingly, the reverse rotation is the opposite. The channel here is not arranged in a radial direction, but is offset at a certain angle. This offset is to force the slider to quickly enter the sliding channel during forward rotation, and also to ensure that the slider can be effectively clamped during reverse rotation, and to place the slider into the sliding channel. In conventional settings, a deflection angle of 30-60 degrees is optimal. That is, when the upper cover rotates forward, the first meshing surface applies a screwing force Fa to the first check tooth of the slider, and the side block of the slider channel forms a reaction force Fb on the first check tooth at its side normal position, and forms an angle β. According to the triangle rule, the two forces are combined, and the direction of the resultant force is from the starting point of the first to the end point of the second. Under the influence of this force, an inward resultant force Fc will be generated between them. When the upper cover rotates reversely, the first meshing surface applies a screwing force fa to the first check tooth of the slider, and the side block of the slider channel forms a reaction force fb on the first check tooth at its side normal position, and forms an angle α. According to the triangle rule, the two forces are combined, and the direction of the resultant force is from the starting point of the first to the end point of the second. Under the influence of this force, an outward resultant force fc will be generated between them.

[0065] 2. To achieve better cost reduction and improved elasticity, the elastic member is an annular body positioned above the main body, with each slider mounted on the annular body. A curved energy storage portion is provided on the annular body between two adjacent sliders to enhance elasticity. The connection between the slider and the annular body can be a small portion, which is more conducive to deformation of the annular body. The curved energy storage portion absorbs and releases deformation energy, which helps extend the service life. In this solution, the annular body, slider, and curved energy storage portion are manufactured using an integrated molding method, using plastic or nylon materials with good deformation recovery properties.

[0066] 3. Through the setting of the channel groove and the channel buckle body, the stable sliding of the slider can be achieved.

[0067] 4. By configuring the transmission disc, the third through-hole, the second transmission tooth, and the second transmission groove, the upper cover can be moved up and down along the main body to achieve clutch engagement between the second transmission tooth and the second transmission groove, thereby achieving clutch engagement between the upper cover and the reel. Furthermore, by configuring the limiting structure, the upper cover can be kept in a stable state during clutch engagement with the reel. Specifically, when the upper cover drives the transmission disc downward to connect with the reel, the second through-hole is positioned at the lower end of the limiting protrusion. When the upper cover drives the transmission disc upward to separate from the reel, the second through-hole is positioned at the upper end of the limiting protrusion. This allows for relatively stable clutch engagement.

[0068] 5. A lacing device based on the same inventive concept has an additional base, and is also provided with a torsion spring and a rotating disk. Through the provision of an elastic sheet and a third transmission groove, it can be achieved that when the upper cover drives the winding wheel to rotate forward, the winding wheel does not drive the rotating disk to rotate, and when it rotates in the reverse direction, it can drive the rotating disk to rotate in the reverse direction. In the lacing tightening mode, the upper cover is connected and matched with the winding wheel. Due to the presence of a non-return mechanism, the upper cover can only rotate forward, thereby driving the winding wheel to tighten the lacing, and stopping the rotation of the lacing locks it. In the lacing loosening mode, the upper cover is disconnected from the winding wheel, and the non-return mechanism is disengaged. The lacing can be pulled out to drive the winding wheel to rotate in the reverse direction, thereby driving the rotating disk to rotate the torsion spring to store energy. When the lacing is released, the torsion spring releases energy, driving the rotating disk to rotate forward, thereby driving the winding wheel to rotate forward. In the loosening mode, partial or complete recovery of the lacing can also be achieved.

[0069] When used on shoes, when the upper cover is disconnected from the reel, the torsion spring still keeps the shoelaces in a semi-tightened state. At this time, the semi-tightened state is not locked, and the shoelaces can be freely extended and retracted, allowing the foot to freely detach from the shoe. When putting on the shoes again, the shoelaces can be stretched and loosened by hand. The stretched shoelaces will automatically retract into the device and can be locked by pressing the button, making it more convenient to lace the shoes, saving time and effort.

[0070] Although the present invention has been particularly shown and described in conjunction with preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, and all such changes are within the scope of protection of the present invention.

Claims

1. A lacing device, comprising: An upper cover, a main body, a backstop mechanism, a winding wheel, and a base, wherein the winding wheel is rotatably arranged in the main body, and the upper cover and the winding wheel can be switched between connection and separation, and the characteristics are: The upper cover is provided with a first meshing surface; When the reel rotates in different directions, two modes of tightening the lace and loosening the lace can be achieved; The upper end surface of the main body is provided with more than two sliding channels, and the sliding channels are composed of two stopper structures; The anti-return mechanism is also located on the upper end surface of the main body, including more than two sliders sliding along the sliding channel, and an elastic member for pressing the slider to slide outward from the main body. The elastic member is an annular body arranged above the main body, and each slider is arranged on the annular body. A curved energy storage part for enhancing elastic performance is arranged between two adjacent sliders on the annular body. There is an intersection between the first sideline of the slider in the clockwise direction and the outer circumference of the main body, and the intersection and the center of the main body form a main body connecting line. The angle formed by the first sideline and the main body connecting line is 30° to 60°. Each slider is provided with a first anti-return tooth that cooperates with the first meshing surface to achieve clamping; The base is provided with a mounting cavity, and the main body is detachably arranged on the base; A rotating disk is arranged in the installation cavity; A torsion spring is also disposed in the installation cavity, and the torsion spring includes a first movable end configured to be engaged and a second movable end configured to be engaged; The first movable end is arranged on the base, and the second movable end is arranged on the rotating disk; The rotating disk is provided with an elastic sheet, and the lower end surface of the winding wheel is provided with a third transmission groove matched with the elastic sheet, so as to enable the winding wheel to mesh with the elastic sheet in only one rotation direction; When the upper cover is connected to the winding wheel, the first anti-return tooth is engaged with the first meshing surface, and when the upper cover rotates forward, the first meshing surface presses the first anti-return tooth, thereby pushing the slider to slide along the sliding channel, thereby pressing The elastic member is forced to deform, and finally each first check tooth enters the next first meshing surface, thereby driving the winding wheel to rotate to achieve a mode of tightening the lace. In the mode of tightening the lace, the winding wheel does not drive the rotating disk to rotate, and the lace can be tightened normally. When the upper cover rotates in the opposite direction, the first check tooth locks the first meshing surface, and it cannot push the slider to slide along the sliding channel. When the upper cover is disconnected from the winding wheel, the first check tooth and the first meshing surface are disconnected, entering a mode of loosening the lace, and the lace can be pulled out, thereby driving the winding wheel to rotate in the opposite direction and then driving the torsion spring to rotate for energy storage. At this time, the lace torsion spring is released to release energy, thereby driving the rotating disk to rotate forward, thereby driving the winding wheel to rotate forward, thereby achieving partial or complete recovery of the lace in the mode of loosening the lace.

2. A lacing device according to claim 1, characterized in that: The number of the sliders is three, and the three sliders are arranged at equal intervals.

3. A lacing device according to claim 1, characterized in that: The block structure is also provided with a channel buckle body for clamping the sliding block.

4. A lacing device according to any one of claims 1 to 3, characterized in that: The lower end of the upper cover is provided with more than two limit blocks, a retaining ring is provided at the upper part of the side surface of the main body, the limit block is clamped on the lower end of the retaining ring, a third through hole is provided at the middle part of the upper end of the main body, a transmission disk is clamped at the middle part of the upper cover, a second transmission tooth is provided on the lower end of the transmission disk, and a second transmission groove is provided on the upper end surface of the winding wheel. The upper cover realizes the clutch cooperation of the second transmission tooth and the second transmission groove by moving up and down along the main body, thereby realizing the clutch cooperation of the upper cover and the winding wheel, and a limiting structure for limiting the up and down movement position of the upper cover is provided on the main body.

5. A lacing device according to claim 4, characterized in that: A first through hole is provided in the middle of the winding wheel, a second through hole is provided in the middle of the transmission disk, the limiting structure includes a base plate and a bayonet provided in the middle of the base plate, the base plate is clamped on the lower end of the main body, the bayonet passes through the first through hole and the second through hole, a limiting protrusion is provided on the side wall of the upper end of the bayonet, when the upper cover drives the transmission disk to move downward and connect with the winding wheel, the second through hole is clamped at the lower end of the limiting protrusion, and when the upper cover drives the transmission disk to move upward and separate from the winding wheel, the second through hole is clamped at the upper end of the limiting protrusion.

6. A lacing device according to claim 5, characterized in that: An elastic deformation groove is arranged on the middle part of the bayonet, and when the limiting protrusion passes through the second through hole, the elastic deformation groove is deformed to pass through.

7. A lacing device according to claim 1, characterized in that: The rotating disk is provided with three elastic sheets, a disk wall is provided downwardly on the circumferential side surface of the rotating disk, a notch for clamping the second movable end of the torsion spring is provided on the disk wall, and the torsion spring is located inside the disk wall.

8. A lacing device according to claim 1, characterized in that: A mounting column is arranged in the middle of the base, the first movable end of the torsion spring is clamped on the mounting column, and three clamping forks are arranged on the mounting column.

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