Lace tying device

Abstract

The utility model discloses a lacing device which comprises a screw cap, a winding reel and a fixed seat, the screw cap is rotatably arranged on the fixed seat, and the winding reel is supported by the fixed seat and can rotate relative to the fixed seat; the winding reel is configured to wind the belt rope when rotating in the tensioning direction and release the belt rope when rotating in the loosening direction, and the winding reel can be driven to rotate in the tensioning direction by screwing the screw cap so as to tighten the belt rope; the lacing device further comprises a spring, one end of the spring is matched with the fixing base, the other end of the spring is matched with the winding reel, and the spring is configured to elastically deform when the winding reel rotates in the loosening direction so as to provide restoring force enabling the winding reel to rotate in the tensioning direction. And the winding reel rotates along the tensioning direction under the action of the restoring force so as to take up part or all of the released belt rope. Therefore, the lacing device can automatically adjust the tightness of the lacing rope, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of lacing devices, in particular to a lacing device which can automatically tighten a belt rope after the belt rope is loosened. Background Art

[0002] There are many kinds of lacing devices on the market, such as shoelace tightening mechanisms. For example, a known knob-type lacing device can tighten the shoelaces by rotating the knob, and when the shoelaces need to be loosened, the knob needs to be pulled up to loosen the shoelaces. However, the degree of loosening requires the user to pull the shoelaces to the appropriate degree by hand, which is actually difficult to adjust in one go. If the opening and closing is large, the knob needs to be pressed again and the loosened shoelaces need to be wound up for a few more weeks by rotating the knob. This operation is troublesome and time-consuming when adjusting the tightness of the shoelaces.

[0003] Based on the above problems, the utility model aims to provide a lacing device which can automatically adjust the tightness according to the tension of the shoe surface after the shoelaces are loosened, thereby facilitating users and bringing them a better usage experience. Utility Model Content

[0004] The utility model discloses a lacing device, comprising: a rotary cover, a winding drum and a fixed seat, wherein the rotary cover can be rotatably arranged on the fixed seat, the winding drum is supported by the fixed seat and can rotate relative to the fixed seat; the winding drum is configured to reel in a belt rope when rotating in a tightening direction and release the belt rope when rotating in a loosening direction; and by screwing the rotary cover, the winding drum can be driven to rotate in the tightening direction to tighten the belt rope;

[0005] The lacing device also includes a spring, one end of which cooperates with the fixed seat, and the other end of which cooperates with the winding drum. The spring is configured to undergo elastic deformation when the winding drum rotates in a loosening direction to provide a restoring force for rotating the winding drum in a tightening direction, so that the winding drum rotates in the tightening direction under the action of the restoring force to retract part or all of the released belt rope.

[0006] Preferably, the spring includes a fixed end and a movable end, the fixed end of the spring cooperates with the fixed seat in a fixed connection manner, and the movable end cooperates with the winding drum in a selective transmission engagement manner; or, the fixed end of the spring cooperates with the winding drum in a fixed connection manner, and the movable end cooperates with the fixed seat in a selective transmission engagement manner.

[0007] The "fixed end" mentioned in this application refers to the fixed connection between the end of the coil spring and its connecting part, and the "movable end" refers to the relative movement between the end of the coil spring and its connecting part. The "transmission engagement" mentioned means that when one of the two mating parts is stationary, the other also remains stationary; or when one moves, the other also moves due to transmission. The two mating parts only form transmission engagement along a certain direction, or form transmission engagement in certain circumstances, but not in other circumstances. This kind of mating is called selective transmission engagement.

[0008] Preferably, the fixing seat comprises a base portion and a shell portion. Optionally, the shell portion and the base portion can be integrally formed, or can be separately formed and then fixedly connected.

[0009] When the base portion and the shell portion are formed as separate components, they can be referred to as "base" and "shell" for short. Preferably, the base and the shell are fixedly connected in a detachable manner. The "base portion" in this application includes a part of the entire fixing base and also includes separate components; similarly, the "shell portion" includes both a part of the entire fixing base and also includes separate components.

[0010] Preferably, the spring is a coil spring comprising an inner end and an outer end.

[0011] In a preferred embodiment of the present invention, the outer end of the coil spring is a fixed end, and the inner end is a movable end, the outer end of the coil spring is fixedly connected to the winding drum, and the inner end of the coil spring is selectively transmission-engaged with the fixed seat; or the outer end of the coil spring is fixedly connected to the fixed seat, and the inner end of the coil spring is selectively transmission-engaged with the winding wire.

[0012] Preferably, a locking block is provided on the winding drum or the fixing seat, and the fixed end of the spring is fixedly connected to the winding drum or the fixing seat by being engaged with the locking block.

[0013] Preferably, the winding drum or the fixing seat is provided with a circle of retaining walls along the circumference, the retaining walls are provided with a notch, the blocking block is provided at the notch, and the free end of at least part of the retaining walls is inclined toward the inside of the circumference relative to its fixed end. The "at least part of the retaining walls" mentioned above refers to a part or all of the whole structure when the retaining wall is an integral structure; or a part or all of the multiple segments when the retaining wall includes multiple segments.

[0014] Preferably, the retaining wall comprises a plurality of retaining blocks arranged at intervals along a circumference, wherein free ends of at least two of the retaining blocks are inclined toward the inside of the circumference relative to fixed ends thereof.

[0015] Preferably, the retaining wall is arranged at the periphery of the bottom of the winding drum, and an opening is arranged at the center of the winding drum. The opening can be used to install a retaining pin, and can also be used to observe the threading condition of the winding drum.

[0016] More preferably, the positioning block may be integrally formed at the bottom of the winding drum, or may be separately formed and then fixedly connected to the bottom of the winding drum.

[0017] Preferably, a one-way engaging portion is provided on the winding drum or the fixing seat, and the movable end of the spring is configured as a hook portion; the one-way engaging portion is configured to engage with the hook portion when the winding drum rotates in the loosening direction.

[0018] Preferably, the one-way meshing portion has an outer convex surface and an inner concave surface, wherein relative sliding can occur between the hook portion and the outer convex surface, and the inner concave surface and the hook portion of the coil spring can form a transmission meshing by matching their shapes.

[0019] Preferably, the one-way meshing portion is S-shaped, and the bending direction of the hook portion of the coil spring is assembled to be consistent with the concave direction of the inner concave surface of the S-shaped one-way meshing portion, so that the hook portion can be hooked into the inner concave surface or hung on the edge of the inner concave surface, thereby engaging with the one-way meshing portion.

[0020] The arrangement of the hook portion and the one-way meshing portion of the coil spring enables sliding and jumping to occur between the movable end of the coil spring and the one-way meshing portion when the winding drum rotates relative to the fixed seat in the tensioning direction, thereby not hindering the rotation of the winding drum in the tensioning direction; on the other hand, when the winding drum rotates in the loosening direction, the hook portion of the coil spring meshes with the one-way meshing portion, and the rotation of the winding drum relative to the fixed seat causes the inner end of the coil spring to continuously rotate relative to the outer end of the coil spring, or the outer end to continuously rotate relative to the inner end, thereby causing the coil spring to undergo elastic deformation and store elastic potential energy.

[0021] In another preferred embodiment of the present invention, the inner end of the coil spring is a fixed end and the outer end is a movable end, wherein the inner end of the coil spring is fixedly connected to the winding drum, and the outer end of the coil spring is selectively transmission-engaged with the fixed seat; or the inner end of the coil spring is fixedly connected to the fixed seat, and the outer end of the coil spring is selectively transmission-engaged with the winding drum.

[0022] Preferably, the winding drum is provided with a slot fixedly connected to the inner end of the coil spring; an inner ratchet ring is provided in the fixing seat, and the outer end of the coil spring is in the shape of a ratchet, and the outer end of the ratchet is selectively engaged with the inner ratchet ring. That is, when the winding drum rotates in the tightening direction, the inner ratchet ring slides relative to the outer end of the coil spring, and when the winding drum rotates in the loosening direction, the inner ratchet ring is engaged with the inner ratchet ring.

[0023] Preferably, the inner ratchet ring is arranged on a base portion of the fixing seat, or the inner ratchet ring is arranged on an inner wall of a shell portion of the fixing seat.

[0024] Preferably, the fixing seat is provided with a slot fixedly connected to the inner end of the coil spring; the winding drum is provided with an inner ratchet ring, the outer end of the coil spring is in the shape of a pawl, and the outer end of the pawl is selectively engaged with the inner ratchet ring. That is, when the winding drum rotates in the tightening direction, relative sliding occurs between the inner ratchet ring and the outer end of the coil spring, and when the winding drum rotates in the loosening direction, the outer end of the coil spring is engaged with the inner ratchet ring.

[0025] Preferably, the inner ratchet ring is arranged on the periphery of the bottom of the winding drum, and an opening is arranged in the center of the winding drum.

[0026] More preferably, the inner ratchet ring may be integrally formed with the bottom of the winding drum, or may be separately formed and then fixedly connected to the bottom of the winding drum.

[0027] Preferably, the card slot is arranged on the base portion of the fixing seat.

[0028] The lacing device of the utility model has the following beneficial effects:

[0029] (1) Through the cooperation of the spring with the winding drum and the fixed seat, one end of the spring is the fixed end and the other end is the movable end, wherein the movable end of the spring cooperates with the winding drum or the fixed seat in a selective transmission engagement manner, so that when the winding drum winds the belt rope in the tightening direction, the movable end of the spring and the winding drum or the fixed seat connected thereto do not form a transmission engagement relationship, thereby not exerting resistance on their relative movement; and when the winding drum rotates in the loosening direction, the movable end of the spring and the winding drum or the fixed seat connected thereto form a transmission engagement relationship, thereby generating elastic deformation with the relative movement between the winding drum and the fixed seat; when the belt rope is loosened to a suitable position, the elastic deformation provides a restoring force for the winding drum to rotate in the tightening direction, and under the action of the restoring force, the spring can drive the winding drum to rotate in the tightening direction so as to partially or completely retract the released belt rope to achieve the purpose of automatically adjusting the tension;

[0030] (2) The two ends of the spring cooperate with the winding drum and the fixed seat so that the winding drum automatically rotates in the loosening direction under the action of the spring restoring force after the belt rope is loosened to adjust the tightness of the belt rope. Compared with the traditional knob lacing mechanism, only one component is added to realize the function of automatic adjustment of tension, which has a simple structure and is easy to operate;

[0031] (3) With the lacing device provided by the utility model, the user can adjust the tightness by manually rotating the rotary cover to reel in the strap, or can adjust the tightness by automatically retracting part or all of the released strap through the restoring force provided by the spring, thereby providing a better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the exploded structure of the lacing device of the first embodiment of the utility model;

[0033] Figure 2 It is a structural schematic diagram of a rotary cover of a lacing device according to a first embodiment of the utility model;

[0034] Figure 3a It is a schematic diagram of the reverse structure of the winding drum of the lacing device of the first embodiment of the utility model;

[0035] Figure 3b yes Figure 3a a top view of the reel shown;

[0036] Figure 3c yes Figure 3b The cross-sectional view of the winding drum along the AA direction and the partial enlarged view at the position of the cross-sectional view A are shown;

[0037] Figure 4 2 is a schematic structural diagram of a coil spring of a lacing device according to a first embodiment of the present utility model;

[0038] Figure 5 is a half-section view of the assembled components of the lacing device of the first embodiment of the utility model;

[0039] Figure 6 is a schematic diagram of a base of a lacing device according to a first embodiment of the utility model;

[0040] Figures 7a-7d It is a schematic diagram of the change in the coordination between the coil spring and the one-way meshing portion during the meshing process between the rotary cover and the winding drum of the lacing device of the first embodiment of the utility model;

[0041] Figure 8a-8c It is a schematic diagram of the elastic deformation of the coil spring when the coil spring is engaged with the one-way engagement portion when the rotating cover of the lacing device of the first embodiment of the utility model is disengaged from the winding drum and the belt rope is unwound under force;

[0042] Figure 9a-9b It is a schematic diagram of the change in coordination between the coil spring and the one-way meshing portion after the rotary cover of the lacing device of the first embodiment of the utility model is disengaged from the winding drum and the force on the belt rope is released;

[0043] Fig.10 It is a schematic diagram of the reverse structure of the winding drum of the lacing device of the second embodiment of the utility model;

[0044] Fig.11 It is a structural schematic diagram of a base of a lacing device according to a second embodiment of the utility model;

[0045] Fig.11a This is a perspective view of the structure of the coil spring, the winding drum and the base assembled in the second embodiment of the utility model;

[0046] Fig.12 It is a structural schematic diagram of a winding drum of a lacing device according to a third embodiment of the utility model;

[0047] Fig.13 It is a structural schematic diagram of a base of a lacing device according to a third embodiment of the utility model;

[0048] Fig.14 It is a structural schematic diagram of the assembly of the coil spring, the winding drum and the base of the lacing device of the third embodiment of the utility model;

[0049] Fig.15 is a schematic structural diagram of a winding drum of a lacing device according to a fourth embodiment of the present utility model;

[0050] Fig.16 It is a structural schematic diagram of the base of the lacing device of the fourth embodiment of the utility model.

[0051] In the figure, each number represents:

[0052] 1. Screw cap; 11. Active tooth; 12. Inner ratchet; 13. Stop pin; 2. Check ring; 21. Block; 22. Elastic pawl; 23. Center ring; 221. Ratchet; 3. Shell; 31. Groove; 32. Wire inlet hole; 33. Flange; 4. Wire reel; 40. Opening; 41. Driven tooth; 42. Threading hole; 43, 62: Block; 44, 61: One-way meshing portion; 45, 64: Inner ratchet ring; 451, Non-meshing surface; 452, Meshing surface; 46, 63: Fixed column; 47, Retaining wall; 471 Block; 5. Coil spring; 5A, Outer end; 5B, Inner end; 6. Base; 611, Outer convex surface; 612, Inner concave surface. DETAILED DESCRIPTION

[0053] The present invention is further described below in conjunction with the accompanying drawings and embodiments, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0054] It should be understood that the terms "up", "down", "left", "right", "front", "back", "length", "width", "horizontal", "vertical", "top", "bottom", "inside", "outside", etc. used in the description of the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are intended to facilitate the description of the present invention and simplify the description, and should not be understood as a restriction that the referred device or component must have a specific orientation or a specific position relationship.

[0055] In addition, the terms "first" and "second" are only used for distinguishing description purposes, without the connotation of relative importance, and do not indicate or imply the number of technical features. Therefore, the features defined by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0056] Unless otherwise specified, the terms "connection" and "fixation" in this utility model should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0057] The utility model discloses a lacing device, comprising a winding drum, a rotary cover, a spring, and a fixed seat. The winding drum is supported by the fixed seat and can rotate relative to the fixed seat, and the belt rope is wound therein. When the winding drum is subjected to force and rotates around the axis, the belt rope can be wound around the wall of its central shaft tube in a tightening direction, such as clockwise, so as to reel and tighten the belt rope; the opposite direction is called a loosening direction, such as counterclockwise, to achieve unwinding, that is, to release the belt rope wound thereon from the winding drum, so as to release a section of the belt rope. The rotary cover is installed on the fixed seat, and the winding drum can be driven to rotate in the tightening direction by screwing the rotary cover, so as to tighten all or part of the released belt rope. One end of the spring cooperates with the fixed seat, and the other end cooperates with the winding drum, and this cooperation relationship allows the spring to undergo elastic deformation and accumulate elastic potential energy when the winding drum rotates in the loosening direction, so that when the winding drum is separated from human power or other external forces, the elastic potential energy inside the lacing device can be released to provide a restoring force for the winding drum to rotate in the tightening direction, so that the spring can operably drive the winding drum to rotate in the tightening direction, thereby tightening all or part of the released belt rope. At this time, the elastic deformation can be completely or partially reset to the tension balance, thereby realizing the function of automatically adjusting the tightness of the belt rope.

[0058] The straps here can be any occasions that need to be tightened or loosened, such as shoelaces. The lacing device can be installed on the upper of the shoe, and the shoelaces are inserted into the shoelaces and passed through the reel, so as to tighten or loosen the upper of the shoe by winding or unwinding. Of course, the lacing device of the utility model can also be used to tighten straps in other occasions, such as neck straps of helmets or hats, curtain straps, luggage straps, etc. This article does not limit the use of the lacing device.

[0059] First embodiment

[0060] The lacing device of the first embodiment of the utility model is described below with reference to the accompanying drawings.

[0061] like Figure 1 As shown, the lacing device of this embodiment includes a rotary cover 1, a non-return gear ring 2, a housing 3, a winding drum 4, a coil spring 5, and a base 6. The housing 3 and the base 6 are connected to form a fixed seat, which is fixed relative to the object to be tied and belongs to a fixed part, while the rotary cover 1 and the winding drum 4 can rotate relative to the fixed part and belong to a moving part.

[0062] The rotary cover 1 is used to drive the winding drum 4 to rotate to wind the belt rope. Figure 1 , Figure 2 As shown, the rotary cap 1 is located at the uppermost or outermost end of the entire lacing device, which is the user's operating end. Its outer surface is provided with a rough surface that is convenient for user operation and improves friction. The rotary cap 1 can rotate around a central axis perpendicular to its outer surface. The central axis is the axis of the rotary cap 1 and also the axis of the entire lacing device. The direction parallel to the axis is the axial direction. Here, the rotary cap 1, the check gear ring 2, and the winding drum 4 are all coaxially arranged, that is, the central axes coincide.

[0063] An inner ratchet 12 coaxial with the central axis is provided on the inner surface of the rotary cap 1. The inner ratchet 12 is composed of a circle of ratchet teeth. The inner ratchet 12 and the elastic pawl 22 of the anti-reverse gear ring 2 form an anti-reverse mechanism, which has the function of only allowing the inner ratchet 12 to rotate in one direction and preventing reverse rotation. An active tooth 11 is also provided on the inner surface of the rotary cap 1.

[0064] like Figure 1As shown, the anti-return gear ring 2 includes three elastic pawls 22 and a center ring 23. The three elastic pawls 22 are connected to the center ring 23 and are integrally formed. The three elastic pawls 22 are fixedly connected to the shell 3 through the center ring 23. Specifically, a protruding block 21 is provided on the lower surface of the center ring 23 of the anti-return gear ring 2, and a groove 31 is provided at a corresponding position of the shell 3. The anti-return gear ring 2 is assembled with the shell 3 by inserting the block 21 into the groove 31 and cannot rotate. The elastic pawl 22 includes a ratchet 221 and an elastic arm. The ratchet 221 can mesh with the tooth gap in the inner ratchet 12 on the rotary cover 1. Due to the tooth surface characteristics of the ratchet pawl, the rotary cover 1 (inner ratchet 12) cannot rotate in the loosening direction, but can only rotate in the tightening direction, that is, it can only rotate in one direction, thereby achieving an anti-reversal effect.

[0065] The shell 3 is arranged below the rotary cover 1. In this embodiment, the shell 3 is detachably installed in the inner cavity of the base 6 and fixedly connected thereto. In this embodiment, the shell 3 and the base 6 are two independent parts, which are formed separately and then fixedly connected to form a fixed seat. Among them, the base 6 is used to fix with the upper to be fastened to the object, and the shell 3 is used to connect with the rotary cover 1, the winding drum 4, etc. In other embodiments, the shell 3 can also be integrally formed with the base 6, that is, the shell part and the base part of the fixed seat are respectively formed, the base part is mainly used to install the lacing device on the object to be fastened, and the shell part has a storage space for supporting the winding drum. Since the shell 3 and the base 6 are relatively fixed, they can be separated or integrated, and the difference is only divided according to the needs. Therefore, the structure arranged on the side wall of the shell 3 can also be arranged on the side wall of the base 6, or the structure arranged on the side wall of the base 6 can also be arranged on the side wall of the shell 3.

[0066] Furthermore, the housing 3 is cylindrical, with a hollow interior, and the winding drum 4 is inserted into the housing 3 from the lower end opening of the housing 3, and the winding drum 4 also has an inner cavity. There is a through hole in the center of the upper end surface of the housing 3, and the center ring 23 of the check gear ring 2 also has a through hole. The upper end of the winding drum 4 along the axial direction is provided with a circle of driven teeth 41 protruding from its upper end surface, as shown in FIG. 3. A circle of matching active teeth 11 is provided on the inner surface of the rotary cover 1 at the position corresponding to the driven teeth 41, and the active teeth 11 is located inside the inner ratchet 12.

[0067] When the rotary cover 1 is buckled onto the housing 3 and pressed downward, the driving teeth 11 in the rotary cover 1 mesh with the driven teeth 41 on the winding drum 4, and the inner ratchet 12 meshes with the elastic pawl 22 of the check gear ring 2. The meshing mode of the two makes it possible for the rotary cover 1 to rotate around the tightening direction, for example, the clockwise direction in this embodiment, and drive the winding drum 4 to rotate and cannot rotate back.

[0068] The cylindrical outer peripheral wall of the housing 3 is provided with a flange 33 extending perpendicularly to the axial direction, and the axial lower edge of the rotary cover 1 is provided with an inwardly buckled round edge. When the rotary cover 1 is buckled on the housing 3, the round edge undergoes elastic deformation and passes over the flange 33, thereby achieving buckling. When the rotary cover 1 is pulled upward, the rotary cover 1 sleeved on the outer surface of the housing 3 will move axially and be axially limited by the flange 33 to prevent it from falling off. When pulled to the position of the flange 33, the active tooth 11 of the rotary cover 1 moves away from the winding drum 4 and disengages from the driven tooth 41, and the winding drum 4 will rotate in the loosening direction under the traction of the belt rope, thereby loosening the belt rope.

[0069] Another limiting method is to provide a stop pin 13 at the center of the inner surface of the rotary cover 1, such as Figure 5 As shown, the center of the winding drum 4 is provided with a through hole of suitable size, the inner diameter of the through hole has a convex part to form a retaining ring, the outer diameter of the front end of the retaining pin 13 is slightly thicker than the outer diameter of the bottom, and the center of the retaining pin 13 has a notch, and the elastic deformation space is reserved through the notch. Although the outer diameter of the front end of the retaining pin 13 is larger than the inner diameter of the retaining ring, it can still be squeezed into the through hole, and then the front end is reset and enlarged, so that it will not fall out of the through hole. The cooperation of the retaining ring and the retaining pin realizes the gear switching of the lacing device. The length of the retaining pin 13 allows the rotary cover 1 to move axially, so as to engage or disengage with the winding drum 4.

[0070] To tighten the belt rope, Figure 1 As shown, the side surface of the housing 3 is provided with a wire entry hole 32, and there are at least two wire entry holes 32, so that the belt rope can enter the cavity of the housing 3 from here and couple with the winding drum 4. The winding drum 4 is also provided with a threading hole 42, that is, the belt rope is finally coupled with the winding drum 4. When the winding drum 4 is driven to rotate by the rotary cover 1, the belt rope is wound in the groove between the inner wall of the housing 3 and the outer wall of the central shaft of the winding drum 4, thereby tightening the belt rope. When the winding drum 4 is disengaged from the rotary cover 1, the winding drum 4 can rotate freely, and the pulling force applied by the belt rope will drive the winding drum 4 to reversely unwind, thereby loosening the belt rope.

[0071] When the lacing device is used, the active teeth 11 on the rotary cover 1 mesh with the driven teeth 41 on the winding drum 4, and the rotation of the rotary cover 1 can drive the winding drum 4 to rotate together. When the rotary cover 1 is turned in the tightening direction (for example, clockwise), a crisp "clicking" sound can be heard, and the ratchet teeth 221 of the check ring 2 mesh with the inner ratchet 12 on the rotary cover 1, and the rotary cover 1 drives the winding drum 4 to rotate in the tightening direction, and the belt rope is wound around the winding drum 4 in circles, and the tied object is slowly tightened by the belt rope until it feels appropriate tightness. If it feels too tight, the rotary cover 1 can be pulled up until the active teeth 11 and the driven teeth 41 on the rotary cover 1 and the winding drum 4 are disengaged. At this time, the originally tightened belt rope drives the winding drum to reverse, that is, unwind (for example, counterclockwise) due to the tension of the shoe surface or the manual pulling force, so that the object is loosened.

[0072] The above-mentioned lacing device is one of the embodiments of the corresponding components in the lacing device of the utility model. The inner ratchet-non-return gear ring is one of the implementation methods for realizing the non-return function, and other non-return mechanisms can also be used. Even, there is no need for a special non-return mechanism, and only the friction force of the surface part of the inner side of the rotary cover 1 in contact with the shell 3 can be increased to prevent relative reversal. Of course, for the sake of safety, setting a non-return mechanism in the lacing device is still a feasible and recommended solution.

[0073] In summary, the lacing device at least has a rotary cover and a winding drum 4 engaged therewith, and when the two are engaged, the rotary cover drives the winding drum 4 to rotate and tighten the belt rope, and when the two are disengaged, the winding drum 4 is in a free state and can unwind the belt rope. The housing 3 is used to support the winding drum 4 and allow it to rotate around the axis. As for other structures and parts, they can be designed and adjusted as needed.

[0074] Since the cord can be freely unwound by pulling the cord after the winding drum 4 is disengaged from the rotary cover, this will result in excessive unwinding of the cord. On the one hand, it is troublesome and time-consuming to tighten the cord or adjust the tension later. On the other hand, the unwinding cord is too long and may be blocked between the inner wall of the housing 3 and the outer wall of the central shaft of the winding drum 4, thereby affecting the normal use of the lacing device. When the lacing device needs to adjust the tension, the rotary cover should be pulled up to release the cord first, and then the rotary cover should be pressed. The winding drum is driven by the rotary cover to rotate to tighten the cord until the appropriate tension is reached. If the appropriate tension cannot be adjusted in one operation, the above-mentioned pulling-pressing-rotating rotary cover action needs to be repeated until the desired tension is reached. The operation is complicated and time-consuming. Therefore, in the present solution, the lacing device is further provided with a coil spring 5. When the cord is released for a certain length, the coil spring 5 enables the lacing device to automatically retract part or all of the released cord, saving time for adjusting the tension.

[0075] like Figure 1 , Figure 4 As shown, the coil spring 5 is arranged between the winding drum 4 and the base 6. The coil spring 5 of this embodiment is a spiral spring, including an outer end 5A and an inner end 5B. One of the two ends of the coil spring 5 is connected with the base 6, and the other end is connected with the winding drum 4, so that the two can affect the elastic deformation of the coil spring 5 when they move relative to each other. The effect of the elastic deformation is that when the winding drum 4 is winding the belt rope, the coil spring 5 will not affect the rotation of the winding drum 4, especially will not apply resistance to it, but when the winding drum 4 is pulled by the belt rope and unwound to loosen the belt rope, the coil spring 5 will apply resistance to its loosening direction to accumulate elastic potential energy, so that when the winding drum 4 is not pulled by the belt rope or is not subject to external forces other than other lacing devices, the elastic potential energy is converted into a restoring force in the tensioning direction so that the coil spring 5 can operably drive the winding drum 4 to rotate in the tensioning direction to retract the belt rope and return to the initial state or reach a balanced state.

[0076] This requires that one end of the coil spring 5 is a fixed end and the other end is a movable end. The fixed end refers to the end that is relatively stationary and fixedly connected to the connected winding drum 4 or base 6, and the movable end refers to the end that is relatively movable in a selective transmission engagement manner with the connected winding drum 4 or base 6.

[0077] In this embodiment, the coil spring 5 can have the inner end 5B as a fixed end and the outer end 5A as a movable end, or the inner end 5B as a movable end and the outer end 5A as a fixed end. At the same time, the inner end 5B can be fixedly connected to the winding drum 4 as a fixed end, and the outer end 5A can be selectively engaged with the base 6 to act as a movable end; or the outer end 5A can be fixedly connected to the winding drum 4 as a fixed end, and the inner end 5B can be selectively engaged with the base 6 to act as a movable end.

[0078] Based on this, there are at least four ways to implement the solution of the utility model via the coil spring 5, which will be described in four embodiments below. This is the first embodiment.

[0079] exist Figures 1 to 6 In the first embodiment shown, the outer end 5A of the coil spring 5 serves as a fixed end and is fixedly connected to the winding drum 4 in a relatively static manner, and the inner end 5B of the coil spring 5 serves as a movable end and is movably connected to the base 6 in a selective transmission engagement manner.

[0080] Specifically, as shown in FIG3 , the lower edge of the winding drum 4 is provided with a retaining block 43 fixedly matched with the coil spring 5. The bottom of the winding drum 4 is provided with a circle of retaining walls 47, and the retaining walls 47 are arranged to form a storage space for accommodating the coil spring 5. The retaining wall 47 is provided with a notch, and the retaining block 43 is provided at the position of the notch. This retaining wall structure is roughly perpendicular to the bottom plane of the winding drum, but because only one end of the coil spring is fixedly connected to the retaining block, the coil spring will detach from the open port of the retaining wall during transportation, causing unnecessary trouble. In order to prevent the coil spring from escaping from the storage space enclosed by the retaining wall, the retaining wall is preferably arranged so that the open port (i.e., the free end) is inclined toward the inside of the circumference relative to the bottom end (fixed end), but this structure will make it difficult to demold the retaining wall. In order to solve this problem, the gap between the retaining wall and the retaining block can be set larger to facilitate demolding, or as shown in FIG. Figure 3a-3c As shown, the bottom retaining wall 47 of the winding drum 4 is configured to include a plurality of blocks 471 spaced apart along a circle, wherein the free ends of at least two blocks 471 are inclined toward the inside of the circle relative to their fixed ends. Because the two blocks 471 and the positioning block 43 can define a circular accommodation space for the coil spring 5, and the free ends of the blocks 471 are inclined toward the inside of the circle, the coil spring can be prevented from escaping from the open port of the accommodation space to a certain extent. In addition, the gaps between the blocks 471 facilitate molding and demolding. More preferably, the free end of each block 471 is inclined toward the inside of the circle relative to its fixed end. As shown in FIG. Figure 3c As shown, in the present embodiment, the free end of each block 471 is inclined inwardly at an angle α of 5° relative to its fixed end. However, the present application does not limit the inward inclination angle of the free end of the block, and an angle in the range of (0-45°] is preferred. It should be noted that the fixed end of the block refers to the end which is fixedly connected to the winding drum 4, and the other end opposite to the fixed end is the free end, and the free end is protrudingly arranged at the bottom of the winding drum 4; further, the free end of the block constitutes the free end of the retaining wall, and the fixed end of the block constitutes the fixed end of the retaining wall. More preferably, a groove is concavely provided at the bottom of the winding drum 4, and the retaining wall 47 is arranged close to the outer edge of the groove, that is, the outer edge of each block is close to the outer edge of the groove. Preferably, the inner edge of each block is on a circumference, and the outer edge is also on a circumference; the outer edge of the positioning block 43 has a certain gap with the outer edge of the groove, which is used to engage the outer end 5A of the coil spring 5. As shown in FIG. Figure 4 and Figure 7a As shown, the outer end 5A of the coil spring 5 includes a bent portion, which just bypasses the gap between the positioning block 43 and the groove and the two ends are against the inner edges of the two stoppers 471 adjacent to the positioning block 43, so as to be fixed to the winding drum in an embedded manner to form a fixed end. Preferably, the positioning block 43 and the retaining wall 47 can be integrally formed at the bottom of the winding drum 4, or they can be separately formed and then fixedly connected, or the positioning block 43 and the retaining wall 47 can be formed in a third component and then fixedly connected to the winding drum 4. In other embodiments, as long as the outer end 5A of the coil spring 5 is adaptively modified in structure, the stopper 471 can also play the role of a positioning block, and play the role of fixing the outer end of the coil spring by cooperating with the adjacent stopper. In this embodiment, as shown in FIG. 3, since the retaining wall 47 is arranged around the bottom periphery of the winding drum 4, an opening 40 for observing the threading path can still be opened in the center of the bottom of the winding drum.

[0081] Furthermore, the movable end of the coil spring 5 is configured as a hook portion, which is in a hook shape. Figure 6 As shown, the base 6 is provided with a one-way meshing portion 61 at a position corresponding to the inner end 5B of the coil spring 5, and the hook portion is constructed so that when the winding drum 4 rotates along the tightening direction, it can move relative to the one-way meshing portion 61, and does not constitute a transmission engagement; when the winding drum 4 rotates along the loosening direction, the hook portion and the one-way meshing portion 61 are transmission-engaged and fixed to the base 6 and remain stationary, so only when the winding drum rotates along the loosening direction does the inner end 5B of the coil spring 5 move in conjunction with the one-way meshing portion to constitute a selective transmission engagement.

[0082] Specifically, the one-way meshing portion 61 is in an S-shape as a whole, and has two outer convex surfaces 611 facing outward and two inner concave surfaces 612 facing inward, and there is no obvious physical interface or boundary distinction between them. The outer convex surface 611 allows the inner end of the coil spring to slide on it in the tightening direction, and the inner concave surface 612 allows the inner end of the coil spring to hook in the loosening direction. The inner end of the coil spring is in a hook shape, which matches the shape of the inner concave surface 612. The bending direction of the hook is consistent with the concave direction of the inner concave surface 612, so that when the winding drum 4 is unwound, the inner end 5B of the coil spring can be placed on the edge of the inner concave surface 612 or hooked into the inner concave surface 612 to form an engagement, and cannot continue to move forward with the base 6 fixed, thereby causing elastic deformation.

[0083] Based on the above content, when the cover 1 is pressed, the cover 1 is rotated clockwise and the winding drum is driven to wind the belt rope, the change process of the winding spring 5 is as follows: Figures 7a to 7d When winding the rope, the winding drum 4 rotates in a clockwise direction, i.e., in a tightening direction, and the positioning block 43 on the winding drum drives the outer end 5A of the winding spring 5 to rotate clockwise, thereby driving the entire winding spring to rotate clockwise, and the inner end 5B of the winding spring 5 also rotates clockwise. Figure 6 , Figure 7a As shown, since the shape of the hook portion of the inner end 5B is basically complementary to the inner concave surface 612 on the left, when the inner end 5B rotates in the clockwise direction, the hook portion will move away from the inner concave surface as the winding drum rotates, and slide along the outer convex surface 611 of the upper part until the hook portion jumps to the inner concave surface 612 on the right, and then continues to slide on the outer convex surface 611 of the lower part in the tensioning direction, and so on. Therefore, both the inner end and the outer end of the coil spring can move, so only part of the elastic potential energy can be temporarily stored inside the coil spring, but as the inner end 5B jumps to the next inner concave surface position, the stored elastic potential energy is released, so the coil spring does not prevent the winding drum from rotating in the tensioning direction (clockwise direction). Therefore, when the winding drum rotates in the tensioning direction, the inner end 5B of the coil spring 5 and the base 6 do not form a transmission meshing relationship.

[0084] Since the rotary cover 1 and the winding drum 4 are in a transmission relationship through the meshing of the active gear 11 and the driven gear 41, the tension of the shoe surface exerts a pulling force in the loosening direction on the winding drum 4 after the belt rope is tightened, and the rotary cover 1 cannot rotate in the reverse direction due to the meshing with the non-return gear ring 2, so the belt rope can be kept in the tightened state at this time. When the rotary cover 1 is lifted up to disengage it from the winding drum 4, the winding drum 4 rotates in the loosening direction under the tension of the belt rope to release the belt rope. This process is as follows Figure 8a , 8bAs shown in , 8c, when the winding drum 4 is unwound counterclockwise, the blocking block 43 drives the coil spring 5 to rotate counterclockwise, and the end of the inner end 5B slides against the outer convex surface 611. When reaching the inner concave surface 612, the hook-shaped inner end 5B forms a transmission engagement with the inner concave surface 612, so that the inner end 5B and the one-way engagement portion 61 are synchronously stationary. The outer end 5A continues to rotate synchronously with the winding drum 4 under the pulling force of the unwinding of the belt rope, so that the coil spring 5 is elastically deformed and obtains elastic potential energy. At this time, the unwinding causes part of the belt rope to be released.

[0085] When the pulling force applied to the belt rope is removed, the elastic potential energy accumulated by the coil spring 5 in resisting the unwinding of the winding drum 4 provides a restoring force for the winding drum 4 to rotate in the opposite direction, i.e., in the tightening direction. Figure 9a As shown, the inner end 5B of the coil spring 5 is now held against and fixed by the end of the inner concave surface 612, and the outer end 5A fixedly connected to the winding drum 4 performs a reset action and drives the winding drum 4 to rotate in the tensioning direction until the elastic potential energy is completely or partially released, and the coil spring 5 returns to a state of no stress or a state of stress reaching a balanced state, as shown in FIG. Figure 9b shown.

[0086] It can be seen that the lacing device of the utility model not only has the function of tightening the belt rope by screwing the rotary cover when the rotary cover is engaged with the winding drum 4, but also has the function of automatically tightening the belt rope, that is, the elastic deformation of the winding spring 5 when the winding drum 4 is unwound can realize the function of automatically winding the belt rope when the winding drum 4 is not affected by the belt rope, so that the length of the belt rope can be restored to a suitable position or an initial state.

[0087] Second embodiment

[0088] Combine the following Fig.10 , Fig.11 A second embodiment of the present invention will be described.

[0089] In the lacing device of this embodiment, the mechanisms of the rotary cover 1, the non-returning tooth ring 2, the housing 3, and the coil spring 5 all have the same functions as the corresponding components in the first embodiment, and can be the same structure as the corresponding components in the first embodiment, or can adopt different structures, which will not be described here. At the same time, the features and contents of the winding drum 4 and the base 6 in this embodiment that are not mentioned compared with the first embodiment can also be understood by referring to the first embodiment, and only the parts that are different from the first embodiment are introduced here.

[0090] exist Figure 10 to Figure 11a In the second embodiment shown, the outer end 5A of the coil spring 5 serves as a fixed end and is fixedly connected to the base 6 in a relatively static manner, and the inner end 5B of the coil spring 5 serves as a movable end and is movably connected to the winding drum 4 in a selective transmission engagement manner.

[0091] Compared with the first embodiment, the positional relationship between the one-way meshing portion and the blocking block in this embodiment is interchanged, that is, a one-way meshing portion 44 is provided at the bottom center of the winding drum 4. Fig.10 The bottom view of the winding drum 4 shows a positioning block 62 on the base 6. In other embodiments, the positioning block 62 can also be arranged on the side wall of the housing 3. Similar to the first embodiment, the base 6 is also provided with a retaining wall, which includes a plurality of spaced retaining blocks, wherein the free end of the retaining block is inclined toward the inside of the circumference relative to its fixed end to prevent the built-in coil spring from accidentally falling out during transportation. The setting of the positioning block 62 and the setting of the retaining block in the retaining wall can refer to the first embodiment and will not be described here. Similar to the first embodiment, the tightening direction of the lacing device in this embodiment is clockwise, and the loosening direction is counterclockwise, and the function of one-way selective engagement can also be realized, specifically: Fig.11 and 11a As shown, the base 6 and the locking block 62 thereon are fixedly connected to the outer end 5A of the coil spring 5. When the winding drum 4 rotates in the tensioning direction (clockwise direction), the inner end 5B of the coil spring contacts the outer convex surface of the one-way meshing portion 44 and produces relative sliding, and the coil spring will not hinder the rotation of the winding drum in the tensioning direction; the inner end 5B does not form a transmission meshing relationship with the one-way meshing portion 44, and does not rotate with the rotation of the winding drum relative to the base 6; when the winding drum rotates in the loosening direction (counterclockwise direction), the inner end 5B of the coil spring is hooked by the one-way meshing portion 44 to form a transmission meshing, so that the inner end 5B of the coil spring rotates with the rotation of the winding drum, and undergoes elastic deformation to store elastic potential energy.

[0092] When the winding drum is no longer unwound by pulling the belt rope, the elastic potential energy of the coil spring 5 is converted into a restoring force for the winding drum to rotate, that is, to rotate in the tensioning direction, so that the winding drum 4 rotates and reels part or all of the belt rope until the elastic potential energy is completely released or partially released to a state of tension balance between the coil spring and other components.

[0093] Third embodiment

[0094] Combine the following Figure 12 to Figure 14 A third embodiment of the present invention will be described.

[0095] Likewise, the same components and parts in this embodiment as those in the previous embodiment will not be described in detail.

[0096] In this embodiment, the inner end of the coil spring 5 serves as a fixed end and is fixedly connected to the base 6 in a relatively static manner, and the outer end 5B of the coil spring 5 serves as a movable end and is movably connected to the winding drum 4 in a selective transmission engagement manner.

[0097] like Fig.13As shown, in order to fix the inner end 5B of the coil spring 5, a fixing column 63 is provided at the center of the base 6, and a straight groove is provided in the middle of the fixing column 63. The inner end 5B of the coil spring 5 is inserted into the straight groove of the groove and wound around the outer surface of the groove, so that the inner end 5B will not loosen, forming a relatively fixed connection.

[0098] The outer end 5A of the coil spring 5 is a movable end, and the inner ratchet ring 45 provided at the bottom of the winding drum 4 cooperates with the outer end 5A. Fig.12 As shown. The ratchet-pawl is a typical one-way meshing transmission mechanism. The shape characteristics of the ratchet and pawl are not described in detail in this application. Each ratchet tooth of the inner ratchet ring 45 has an engaging surface 452 and a non-engaging surface 451; accordingly, the outer end 5A of the coil spring 5 is a barb portion, and the barb portion is in the shape of a pawl, with an inner hook surface and an outer inclined surface. In this embodiment, as Fig.12 As shown, since the inner ratchet ring 45 is arranged at the outer periphery of the bottom of the winding drum 4, an opening 40 for observing the threading path can still be opened in the center of the bottom of the winding drum 4. Preferably, the inner ratchet ring 45 can be integrally formed at the bottom of the winding drum 4, or can be separately formed and then fixedly connected. Among them, the inner ratchet ring 45 can be continuous or have gaps. Compared with the one-way meshing part in the first and second embodiments, the use of a ratchet-pawl structure as a selective engagement transmission mechanism is easier to form, and can provide a larger accommodating space to accommodate more turns of the coil spring and accumulate more elastic potential energy, so that the winding drum has a stronger ability to automatically rotate.

[0099] When the winding drum 4 rotates clockwise, i.e., in the tightening direction, the outer inclined surface of the outer end 5A contacts the non-meshing surface 451 of the inner ratchet ring 45, and the non-meshing surface 451 slides along the outer inclined surface of the barb portion until the barb portion jumps to the next ratchet tooth and gets stuck therein, and then the non-meshing surface 451 of the next ratchet tooth slides and rotates along the non-meshing surface 451 of the ratchet. Therefore, although the outer end 5A contacts or briefly meshes with the inner ratchet ring 45, it never forms a transmission mesh, i.e., it does not rotate along with the rotation of the winding drum 4, and the barb portion at the outer end of the winding spring 5 does not hinder the rotation of the inner ratchet ring 45.

[0100] On the other hand, when the winding drum 4 rotates in the counterclockwise direction, i.e., in the loosening direction, the inner ratchet ring 45 on the winding drum 4 rotates in the counterclockwise direction, the outer inclined surface of the outer end 5A of the coil spring is not subjected to force, and its inner hook surface abuts against the meshing surface 452 of the inner ratchet ring 45 to form a transmission meshing, i.e., the meshing surface 452 rotates counterclockwise, and the outer end 5A of the coil spring also rotates with it. The inner end of the coil spring 5 is fixed by the slot of the fixing column 63 and remains stationary, while the outer end 5A rotates with the winding drum 4, thereby generating elastic deformation. After the winding drum 4 stops rotating counterclockwise, the winding drum 4 rotates clockwise under the action of the restoring force generated by the elastic deformation of the coil spring 5, thereby winding up the belt rope, until the elastic deformation is completely released or partially released to a state of force balance.

[0101] Fourth embodiment

[0102] Fig.15 , Fig.16 The fourth embodiment of the utility model is shown. Different from the third embodiment, the positions of the fixing post and the slot thereon are interchanged with the inner ratchet ring. Specifically, the winding drum 4 has a fixing post 46, a straight slot is provided in the middle of the fixing post 46, and an inner ratchet ring 64 is provided on the base 6. Due to the interchange of positions, when the clockwise direction is still the winding and tightening direction and the counterclockwise direction is the unwinding and loosening direction, the tooth surface of the inner ratchet ring 64 and the barb of the coil spring 5 are relative to each other. Fig.14 The third embodiment shown is a mirror image of each other at 180°, thereby achieving the same function as the third embodiment. It is easy to imagine that the inner ratchet ring 64 can also be arranged on the side wall of the housing 3 fixedly connected to the base 6.

[0103] It should be noted that the above embodiments are described by taking the tightening direction as the clockwise direction and the loosening direction as the counterclockwise direction as an example. Obviously, if the tightening direction is counterclockwise and the loosening direction is clockwise, it is also feasible. Correspondingly, the components or structures and directions that have a transmission relationship with the rotation in each embodiment can be adaptively adjusted.

[0104] Based on the above four embodiments, the main principles of this solution are:

[0105] (1) When the winding drum 4 is wound along the tensioning direction, the inner and outer ends of the winding spring 5 always remain relatively still, so basically no elastic deformation occurs. Since one end of the winding spring 5 cooperates with the moving part (i.e., the winding drum) and the other end cooperates with the fixed part (the base or shell of the fixed seat), when the winding drum rotates along the tensioning direction, only one end of the winding spring forms a transmission meshing relationship with the component connected to it, and the other end is a relatively free end, so the inner and outer ends can remain relatively still, and the winding spring will not undergo elastic deformation. For example, when the winding drum 4 rotates along the tensioning direction:

[0106] I. The outer end of the coil spring 5 rotates with the winding drum 4, and the inner end can rotate freely because it does not form a transmission mesh with the base 6. For example, Figure 1 , Figures 7a-7d The first embodiment shown; or

[0107] II. The outer end of the coil spring 5 is fixed to the base 6 and remains stationary, and the inner end 5A is not engaged with the winding drum, and does not rotate with the winding drum 4 but remains basically stationary (only elastic perturbations such as local squeezing), for example Fig.10 , Fig.11 The second embodiment shown; or

[0108] III. The inner end of the coil spring 5 is fixed to the base 6 and remains stationary, and the outer end does not rotate with the rotation of the winding drum 4, for example Figure 12 to Figure 14 In the third embodiment shown, although the outer end is engaged with the winding drum 4, it does not form a transmission relationship, that is, no transmission engagement is formed; or

[0109] IV. The inner end of the coil spring 5 rotates with the winding drum 4, forming a relatively static fixed transmission relationship, and the outer end does not form a transmission engagement with the base 6, but can rotate freely, for example Fig.15 , Fig.16 The fourth embodiment is shown.

[0110] (2) When the winding drum 4 is unwound in the loosening direction, the two ends of the coil spring 5 respectively form a transmission relationship with the moving part (winding drum) and the fixed part (the base or shell of the fixed seat), that is, one end is fixed to the fixed seat and remains stationary, and the other end is driven by the winding drum 4 and rotates with it. Since the inner and outer ends of the coil spring 5 have relative movement, the coil spring 5 will undergo elastic deformation, thereby generating elastic potential energy that provides restoring force. For example, when the winding drum 4 rotates in the loosening direction:

[0111] I. In the first embodiment, the outer end of the coil spring 5 rotates with the winding drum 5, and the inner end is fixed to the base 6 and remains stationary;

[0112] II. In the second embodiment, the outer end of the coil spring 5 is fixed to the base 6 and remains stationary, and the inner end rotates with the winding drum 4;

[0113] III. In the third embodiment, the inner end of the coil spring 5 is fixed to the base 6 and remains stationary, and the outer end rotates with the winding drum 4;

[0114] IV. In the fourth embodiment, the inner end of the coil spring 5 rotates with the winding drum 5, and the outer end is fixed to the base 6 and remains stationary.

[0115] In summary, one end of the coil spring 5 is a fixed end, and the other end is a movable end. The fixed end is matched with the fixed seat or the winding drum 4 in a fixed connection mode, and the movable end is matched with the winding drum 4 or the fixed seat in a selective transmission engagement mode. The selective transmission engagement is manifested in that when the winding drum 4 reels the belt rope in the tightening direction, the movable end of the coil spring 5 does not form a transmission engagement relationship with the winding drum 4 or the fixed seat to which it is matched, and does not move with the movement of the latter or remain still; but when the winding drum 4 releases the belt rope in the loosening direction, the movable end of the coil spring 5 forms a transmission engagement relationship with the winding drum 4 or the fixed seat to which it is matched, and follows the movement or stillness of the latter, so that the two ends of the coil spring move relative to each other, thereby causing elastic deformation and generating a restoring force that can cause the winding drum 4 to reel, which is used to drive the winding drum to rotate in the tightening direction to tighten all or part of the belt rope.

[0116] The above description is only a preferred embodiment of the utility model, which is a further detailed description of the utility model in combination with a specific preferred implementation method. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lacing device, comprising: A rotary cover, a winding drum and a fixed seat, wherein the rotary cover can be rotatably arranged on the fixed seat, and the winding drum is supported by the fixed seat and can rotate relative to the fixed seat; The winding drum is configured to wind up the belt rope when rotating in the tightening direction and release the belt rope when rotating in the loosening direction, and the winding drum can be driven to rotate in the tightening direction by screwing the rotary cap to wind up the belt rope; characterized in that, The lacing device also includes a spring, one end of which cooperates with the fixed seat, and the other end of which cooperates with the winding drum. The spring is configured to undergo elastic deformation when the winding drum rotates in a loosening direction to provide a restoring force for rotating the winding drum in a tightening direction, so that the winding drum rotates in the tightening direction under the action of the restoring force to retract part or all of the released belt rope.

2. The lacing device according to claim 1, characterized in that: The spring includes a fixed end and a movable end, the fixed end of the spring cooperates with the fixed seat in a fixed connection manner, and the movable end cooperates with the winding drum in a selective transmission engagement manner; or, the fixed end of the spring cooperates with the winding drum in a fixed connection manner, and the movable end cooperates with the fixed seat in a selective transmission engagement manner.

3. The lacing device according to claim 2, characterized in that: The spring is a coil spring including an inner end and an outer end, wherein the outer end of the coil spring is a fixed end and the inner end is a movable end; the outer end of the coil spring is fixedly connected to the winding drum, and the inner end of the coil spring is selectively engaged with the fixed seat; or the outer end of the coil spring is fixedly connected to the fixed seat, and the inner end of the coil spring is selectively engaged with the winding drum.

4. The lacing device according to claim 3, characterized in that: The winding drum or the fixing seat is provided with a locking block, and the outer end of the winding spring is fixedly connected to the winding drum or the fixing seat by being engaged with the locking block.

5. The lacing device according to claim 3, characterized in that: The winding drum or the fixing seat is provided with a one-way meshing portion, and the inner end of the coil spring is provided with a hook portion; the hook portion is configured to be in transmission meshing with the one-way meshing portion when the winding drum rotates in the loosening direction.

6. The lacing device according to claim 4, characterized in that: The winding drum or the fixing seat is provided with a circle of retaining walls along the circumference, the retaining wall is provided with a notch, and the positioning block is arranged at the notch; the free end of at least part of the retaining wall is inclined toward the inside of the circumference relative to its fixed end.

7. The lacing device according to claim 6, characterized in that: The retaining wall is arranged on the periphery of the bottom of the winding drum, and an opening is arranged in the center of the winding drum.

8. The lacing device according to claim 2, characterized in that: The spring is a coil spring including an inner end and an outer end, wherein the inner end of the coil spring is a fixed end and the outer end is a movable end, wherein the inner end of the coil spring is fixedly connected to the winding drum, and the outer end of the coil spring is selectively transmission-engaged with the fixed seat; or the inner end of the coil spring is fixedly connected to the fixed seat, and the outer end of the coil spring is selectively transmission-engaged with the winding drum.

9. The lacing device according to claim 8, characterized in that: The winding drum is provided with a slot, and the inner end of the coil spring is matched with the slot to be fixedly connected to the winding drum; an inner ratchet ring is provided in the fixing seat, and the outer end of the coil spring is configured to be pawl-shaped, and the pawl-shaped outer end is configured to be in transmission engagement with the inner ratchet ring when the winding drum rotates in the loosening direction.

10. The lacing device according to claim 8, characterized in that: The fixing seat is provided with a slot, and the inner end of the coil spring is matched with the slot to be fixedly connected to the fixing seat; the winding drum is provided with an inner ratchet ring, and the outer end of the coil spring is configured to be pawl-shaped, and the outer end of the pawl-shaped end is configured to be in transmission engagement with the inner ratchet ring when the winding drum rotates in the loosening direction.

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