A spool and a cinching device comprising the same

Abstract

The application discloses a spool, the shaft cylinder of the spool has an inner cavity, a first threading hole, a second threading hole, a first wire outlet hole and a second wire outlet hole are arranged on the side wall of the shaft cylinder, the first threading hole and the first wire outlet hole are located on opposite sides of the shaft cylinder, and the second threading hole and the second wire outlet hole are located on opposite sides of the shaft cylinder; a first wire path is formed between the first threading hole, the inner cavity of the shaft cylinder and the second wire outlet hole, a second wire path is formed between the second threading hole, the inner cavity of the shaft cylinder and the second wire outlet hole, and the first wire path and the second wire path are in a separated three-dimensional intersection mode. The application also provides a fastening device based on the spool, the fastening device adopts a threading mode, and has the advantages of convenient threading, high accuracy and low threading technical difficulty.

Description

Technical Field

[0001] The present invention relates to the technical field of lacing, and in particular to a bobbin and a lacing device comprising the bobbin. Background Art

[0002] Automatic tightening devices have been applied to shoes and bags, providing great convenience for people's lives. With the increasing popularity of automatic tightening devices, market demand is growing, and simplifying the production and assembly process has become a hot topic for tightening device manufacturers. The spool is an essential component of the automatic tightening device, used to wind the laces around it to tighten the items or release the laces to loosen the items. The spool is generally an I-shaped wheel, consisting of two chassis and a shaft. The annular groove formed on the outer diameter of the shaft between the two chassis constitutes the storage space for winding the laces. In order for the spool to be able to wind the laces, the laces need to be coupled to the spool.

[0003] A commonly used spool structure currently is to fix the free end of the lace to the inside of the shaft tube so that the knot is hidden and does not affect the winding and release of the lace in the annular groove. This spool sets a cavity inside the shaft tube to guide the threading, which is convenient for threading. However, there are two major problems: First, during the threading process, the lace is directly passed through the outlet of the shell from the outside of the shaft tube without passing through the internal cavity of the shaft tube. This threading method does not achieve the coupling between the lace and the spool, so it will cause threading failure; and this incorrect threading path cannot be directly observed by the naked eye, which increases the difficulty and complexity of product qualification inspection; second, this threading method requires the formation of a cavity inside the shaft tube to guide the threading, which is a complex manufacturing process. In addition, the cavity of the shaft tube must be large enough to set the threading cavity. The corresponding shaft tube radius must be large enough. Under the condition of the same outer diameter of the chassis, the lace winding capacity of the spool is greatly reduced.

[0004] Another type of spool has a guide ramp on one side of the barrel, which communicates with the outer area of ​​the spool. After the lace is inserted into the barrel, it is guided by the guide ramp and exits the spool through the opening of the chassis to the outer area. A problem with this type of spool-lace coupling process is that the knot of the lace is hidden in the inner cavity of the barrel. Because the guide ramp occupies the position of the inner cavity, the knot can easily escape from the opening. After the spool is assembled with the other components of the tie-down device, the escaped knot can easily get stuck in the base member, preventing the spool from rotating freely.

[0005] Therefore, there is an urgent need for a spool with high threading accuracy, convenient and fast operation, and low technical difficulty, and a tie-down device comprising the spool. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, one object of the present invention is to provide a bobbin for coupling and winding a lace; the bobbin comprises a barrel and a first chassis and a second chassis located at opposite ends of the barrel, wherein an outer area of ​​the barrel between the first chassis and the second chassis forms a groove for winding the lace; wherein

[0007] The shaft cylinder has an inner cavity, and a side wall of the shaft cylinder is provided with a first threading hole, a second threading hole, a first wire outlet hole, and a second wire outlet hole, wherein the first threading hole and the first wire outlet hole are located on opposite sides of the shaft cylinder, and the second threading hole and the second wire outlet hole are located on opposite sides of the shaft cylinder;

[0008] A first wiring path is formed between the first threading hole, the inner cavity of the shaft cylinder and the first wire outlet hole, and a second wiring path is formed between the second threading hole, the inner cavity of the shaft cylinder and the second wire outlet hole. The first wiring path and the second wiring path are separated and three-dimensionally crossed.

[0009] The "separate stereoscopic intersection" mentioned in this patent is also called an isolated stereoscopic intersection or a non-interconnected stereoscopic intersection, which refers to an intersection between two paths that are not connected to each other; the separated stereoscopic intersection includes both complete separation of the upper path and the lower path at the spatial intersection position with a distance difference, and also includes zero-distance contact between the lower edge of the upper path and the upper edge of the lower path at the spatial intersection position. The "upper path", "lower path", "upper edge" and "lower edge" here are all determined based on the actual spatial positions of the two routing paths when the spool is in the threading state, and the up and down here are the up and down at the spatial intersection, because the up and down position relationship of the first routing path and the second routing path at other spatial positions may be different from the up and down position relationship at the spatial intersection. The so-called "spatial intersection" is the intersection of the projection lines of the two routing paths when projected on a plane parallel to the plane where the first chassis or the second chassis is located.

[0010] Preferably, the first chassis and the second chassis are arranged in parallel.

[0011] Preferably, the first threading hole and the second threading hole are located on opposite sides of the shaft cylinder.

[0012] Preferably, the first threading hole and the second wire outlet hole are located on the same side of the shaft cylinder, and the second threading hole and the first wire outlet hole are located on the same side of the shaft cylinder.

[0013] Preferably, the included angle between the projection lines of the central axes of the first threading hole and the first outlet hole on the plane where the first chassis is located is 135° to 180° or they are parallel to each other.

[0014] Preferably, the included angle between the projection lines of the central axes of the second threading hole and the second outlet hole on the plane where the first chassis is located is 135° to 180° or they are parallel to each other.

[0015] Preferably, the first routing path and the second routing path are substantially straight lines.

[0016] The term "substantially straight" refers to a straight line or a curve with a very small curvature. Substantially straight means the curvature of the line is equal to or close to zero. Preferably, the curvature of the first routing path or the second routing path is less than 0.1. Therefore, both the first routing path and the second routing path are opposite routing paths.

[0017] The shaft tube in this patent includes two sides based on the "shaft tube symmetry plane", and the "shaft tube symmetry plane" is a plane established by the "axis of symmetry of the first chassis" and the "axis line of the shaft tube". Among them, the so-called "same side of the shaft tube" refers to the same side of the shaft tube symmetry plane, and the "opposite sides of the shaft tube" refers to the two sides of the shaft tube symmetry plane. Therefore, the first wiring path between the first threading hole, the inner cavity of the shaft tube and the first outlet hole on the opposite side of the first threading hole is a opposite threading path; similarly, the second path is also an opposite threading path. The opposite threading path is short, so that the lace is basically routed by inertia in a natural state. In the prior art, a cavity is set to guide the wiring, and a certain force is applied to the lace to force it to route according to a predetermined track. Therefore, opposite threading is easier to achieve blind threading. If the wiring is set through the cavity and cannot be observed through the window, it is easy to miss the threading.

[0018] Preferably, the first threading hole and the second threading hole are both symmetrical holes.

[0019] Preferably, the centers of the first threading hole and the second threading hole are located at different axial heights of the shaft tube. The "axial height" mentioned in this patent refers to the distance from a point on the shaft tube to the lower chassis along the axial direction of the shaft tube. The chassis located above the spool during actual use is called the "upper chassis", and the chassis located below is called the "lower chassis". Specifically, in this patent, when the spool is threading, the first chassis is the upper chassis and the second chassis is the lower chassis. The axial height difference between the centers of the first threading hole and the second threading hole enables the first wiring path and the second wiring path to achieve a separate three-dimensional intersection.

[0020] Preferably, the first threading hole and the second threading hole include an entry end and an exit end, and the size of the exit end is smaller than the size of the entry end.

[0021] Preferably, the first threading hole and the second threading hole are trumpet-shaped structures. The smaller end of the trumpet-shaped structure is the exit end, which is used for the lace to exit the threading hole and enter the inner cavity of the shaft cylinder. The exit end also has the function of clamping the knot after the lace is tied, so that the lace is coupled to the spool.

[0022] More preferably, the central axis of the threading hole of the trumpet-shaped structure is parallel to the plane where the first chassis or the second chassis is located.

[0023] Further preferably, the central axes of the first threading hole and the second threading hole are parallel to the first chassis or the second chassis, but the distances to the first chassis or the second chassis are different and the projections of the central axes of the first threading hole and the second threading hole on the first chassis or the second chassis intersect.

[0024] Preferably, the size of the first wire outlet hole is larger than the size of the first wire threading hole, and the size of the second wire outlet hole is larger than the size of the second wire threading hole.

[0025] Preferably, the centers of the first wire outlet hole and the second wire outlet hole can be located at the same axial height of the shaft cylinder, or at different axial heights of the shaft cylinder. Because the size of the wire outlet hole can be larger than the size of the threading hole, even if the two threading holes are located at different axial heights of the shaft cylinder, as long as the size of the corresponding wire outlet hole is large enough, the lace that exits from the threading hole to the inner cavity of the shaft cylinder can also reach the wire outlet hole in a straight line and exit the inner cavity of the shaft cylinder through the wire outlet hole, and the position where the lace exits from the wire outlet hole is not limited to the center of the hole, as long as it can exit from the wire outlet hole. For example, it can be the center of the wire outlet hole, above the center of the wire outlet hole, to the left of the center, or to the right of the center. Therefore, the two wire outlet holes can be located at different axial heights of the shaft cylinder, or at the same axial height of the shaft cylinder.

[0026] Further preferably, the first and second wire outlet holes are of the same size and shape and are symmetrically arranged. The so-called "symmetrical arrangement" means that the first and second wire outlet holes are symmetrically arranged about the "axial cylinder symmetry plane" and have the same shape and size.

[0027] More preferably, the axial heights of the first and second wire outlet holes are between 80% and 100% of the height of the groove for winding the lace. Specifically, the axial heights of the first and second wire outlet holes are both h, and the axial height of the groove for winding the lace is H, then 80%H≤h≤H.

[0028] Preferably, the first wire outlet hole is rectangular or rounded rectangular.

[0029] Preferably, the second wire outlet hole is rectangular or rounded rectangular.

[0030] Preferably, the first chassis includes an opening, which is in communication with the inner cavity of the shaft cylinder. The opening is used to observe the wiring situation in the inner cavity of the shaft cylinder to improve the threading accuracy.

[0031] Preferably, the end surface of the second chassis is provided with engaging teeth.

[0032] Preferably, a stop pin is further provided on the end surface of the second chassis.

[0033] Preferably, the engaging teeth are arranged around the stop pin.

[0034] Preferably, according to an embodiment of the present invention, a recessed groove is provided in the center of the second chassis.

[0035] More preferably, the sink is a cylindrical sink.

[0036] Preferably, according to an embodiment of the present invention, a stop pin is provided on the bottom surface of the sink, and the stop pin extends along the axial direction of the shaft cylinder toward a side away from the second chassis.

[0037] Preferably, engaging teeth are provided on the end surface of the second chassis around the outside of the sink.

[0038] Preferably, the stop pin is an elastic stop pin.

[0039] Preferably, the stop pin is integrally formed with the spool. The stop pin is provided on one side of the second chassis of the spool, eliminating the process of assembling the stop pin. This structural arrangement is more conducive to the miniaturization and integration of the tightening device. On the other hand, in this integrated stop pin-spool structure, the stop pin is formed on one end face of the spool and extends in a direction away from the inner cavity of the spool. It does not need to pass through the inner cavity of the spool and does not occupy the inner cavity space, making opposite threading possible. At the same time, the inner cavity of the shaft barrel on one side of the first chassis can be left empty and connected to the external area to form an opening, which can be used to observe the wiring path and improve the threading accuracy of the spool.

[0040] Preferably, according to an embodiment of the present invention, the first chassis and the second chassis extend radially outward from the shaft cylinder.

[0041] The spool provided in the present application has a relatively small inner cavity space of the barrel because the side wall of the barrel is only provided with a threading hole and no cavity for guiding threading is provided. Even if the threading hole is in a trumpet-shaped structure, since the trumpet-shaped structure is constructed by utilizing the wall thickness of the barrel, the required inner cavity space of the barrel is still very small compared to that of providing a threading cavity, thereby reducing the outer diameter of the entire barrel, thereby improving the lacing accommodation capacity of the spool.

[0042] Another object of the present invention is to provide a tying device including a spool, comprising: a housing having an interior area; a rotary cover rotatably connected to the housing; a spool for coupling and winding a lace, rotatably disposed within the interior area of ​​the housing; the spool comprising a barrel and a first chassis and a second chassis located at opposite ends of the barrel, wherein an outer area of ​​the barrel between the first chassis and the second chassis forms a groove for winding the lace; wherein

[0043] The housing has a first inlet and a second inlet for the lace to enter the interior area of ​​the housing from the exterior area of ​​the housing; the housing also has a first outlet and a second outlet for the lace to exit the interior area of ​​the housing to the exterior area of ​​the housing; the first inlet and the first outlet are located on opposite sides of the housing, and the second inlet and the second outlet are located on opposite sides of the housing;

[0044] The shaft cylinder has an inner cavity, and a side wall of the shaft cylinder is provided with a first threading hole, a second threading hole, a first wire outlet hole, and a second wire outlet hole, wherein the first threading hole and the first wire outlet hole are located on opposite sides of the shaft cylinder, and the second threading hole and the second wire outlet hole are located on opposite sides of the shaft cylinder;

[0045] When the spool is rotated to reach the alignment position between the shell and the spool, the first entrance of the shell, the first threading hole of the spool, the inner cavity of the barrel, the first wire outlet hole of the spool, and the first exit of the shell constitute a first wiring path of the tightening device; the second entrance of the shell, the second threading hole of the spool, the inner cavity of the barrel, the second wire outlet hole of the spool, and the second exit of the shell constitute a second wiring path of the tightening device, wherein the first wiring path of the tightening device and the second wiring path of the tightening device are separated and three-dimensionally crossed.

[0046] When the shell and the spool are in the aligned position, the first threading hole of the spool is aligned with the first inlet of the shell, the second threading hole of the spool is aligned with the second inlet of the shell, the first wire outlet hole of the spool is aligned with the first outlet of the shell, and the second wire outlet hole of the spool is aligned with the second outlet of the shell.

[0047] "The first threading hole of the spool is aligned with the first inlet of the housing" does not strictly mean that the center of the first threading hole is aligned with the center of the first inlet. It is sufficient that the first inlet is aligned with a portion of the first threading hole. All references to "hole-to-hole" and "hole-to-opening" alignment in this application follow this interpretation, meaning that only partial alignment of the two areas is sufficient.

[0048] Preferably, the first inlet and the second outlet are located on the same side of the shell, and the second inlet and the first outlet are located on the same side of the shell.

[0049] Consistent with the definition of "both sides of the shaft barrel" mentioned above, the housing in this patent also includes both sides based on the "shell symmetry plane." The so-called "same side of the housing" refers to the same side of the shell symmetry plane, and "opposite sides of the housing" refers to the two sides of the shell symmetry plane.

[0050] Preferably, the central axes of the first inlet and the second inlet intersect in the same plane, which is perpendicular to the central axis of the housing.

[0051] Preferably, the first inlet and the second inlet are symmetrically arranged. The so-called symmetrical arrangement means that they are arranged on both sides of the symmetrical plane of the shell, and are symmetrically arranged and have the same shape and size.

[0052] Preferably, the first inlet and the second inlet are lug structures.

[0053] Preferably, the central axes of the first outlet and the second outlet intersect in the same plane, which is perpendicular to the central axis of the housing.

[0054] Preferably, the first outlet and the second outlet are symmetrically arranged. The so-called symmetrical arrangement means that they are arranged on both sides of the symmetrical plane of the shell, and are symmetrically arranged and have the same shape and size.

[0055] Preferably, the first wiring path of the tie-down device is substantially a straight line, and the second wiring path of the tie-down device is substantially a straight line. In this application, the first wiring path of the spool constitutes a portion of the first wiring path of the tie-down device; similarly, the second wiring path of the spool constitutes a portion of the second wiring path of the tie-down device.

[0056] The term "substantially straight" refers to a straight line or a curve with a very small curvature. Substantially straight means that the curvature of the line is equal to or close to 0. Preferably, the curvature of the first path or the second path is less than 0.1.

[0057] Preferably, the end surface of the second chassis of the spool is further provided with a stop pin, and the rotary cover is provided with a retaining ring component, and the retaining ring component cooperates with the stop pin to form a gear switching mechanism of the tightening device.

[0058] Preferably, the first chassis includes an opening, and the opening is connected to the inner cavity of the shaft tube. In the present application, the stop pin is arranged on the side of the second chassis of the bobbin, so that the inner cavity on the side of the first chassis can be vacated to communicate with the external area to form an opening, and the opening can be used to observe the routing path and improve the threading accuracy; while in the prior art, the stop pin is an independent component, which passes through the center of the inner cavity of the shaft tube and is positioned, so the lace cannot be threaded in opposite directions and can only be threaded on the same side by bypassing the stop pin; and because of the obstruction of the stop pin, the routing situation in the inner cavity of the shaft tube cannot be observed from the outside, and the forced intervention of the threading cavity on the same side of the lace leads to frequent missed or wrong threading. The bobbin structure in the present application can avoid missed or wrong threading to the greatest extent. On the other hand, the stop pin is arranged on the side of the second chassis of the bobbin, which eliminates the process of assembling the stop pin, and the integrated structure of the bobbin-stop pin is more conducive to the miniaturization and integration of the tightening device. Third, the inner cavity space of the shaft tube in the present application is large enough to completely accommodate the knot of the lace, so the knot of the lace will not affect the normal operation of other components; while in the prior art, the stop pin running through the center of the inner cavity of the shaft tube sometimes contacts and rubs against the knot of the lace, causing the spool to encounter greater resistance when rotating.

[0059] The spool is usually designed with two threading holes, which correspond to the two free ends of a lace or one free end of two laces respectively. This design is more conducive to the balance of the entire tightening device when the lace is tightened. When the lace is coupled to the spool of the tightening device, a counter-threading method is adopted. The counter-threading path is short and the lace basically follows the inertial routing in a natural state, so it is more conducive to blind threading, and it is faster to thread the two free ends of the lace at the same time. However, there is a problem with threading the two free ends in opposite directions at the same time: the routing paths in the same plane will collide at the intersection and thus affect the threading speed. Therefore, in this application, the two counter-threading paths are cleverly set to a separate three-dimensional intersection, which do not affect each other during threading, greatly improving the accuracy and convenience of threading, and effectively avoiding conflicts between the two laces. In addition, the first chassis is provided with an opening connected to the inner cavity of the shaft cylinder, which can be used to observe the routing of the lace in the inner cavity of the shaft cylinder, further improving the accuracy and reliability of threading.

[0060] Preferably, according to an embodiment of the present invention, the spool and the housing include alignable markings to indicate when the spool reaches an aligned position with the housing.

[0061] Preferably, according to an embodiment of the present invention, a stop pin is provided on the bottom surface of the second chassis, and a stop ring component is provided on the rotary cover, and the stop ring component cooperates with the stop pin to form a gear switching mechanism of the tightening device.

[0062] Preferably, the retaining ring member and the rotary cover are made in one piece.

[0063] Preferably, the retaining ring member and the screw cap are manufactured separately and then connected together.

[0064] Preferably, the center of the retaining ring component is a hollow column, and a retaining ring is provided on the side wall of the hollow column.

[0065] Preferably, the retaining ring component is further provided with engaging teeth, which are arranged around the hollow column and can engage with the engaging teeth of the bobbin.

[0066] The gear switching mechanism can provide at least two gears for the tightening device, and the two gears can be switched by the axial movement of the rotary cover relative to the housing. The position fixation of the axial movement is mainly achieved by the cooperation of the retaining pin and the retaining ring.

[0067] More preferably, according to an embodiment of the present invention, the retaining pin is an elastic retaining pin. Preferably, the fastening device further comprises a base, and the base is mounted on the wearable article independently of other components of the fastening device.

[0068] Preferably, the base includes an inner cavity, and the shell is installed in the inner cavity of the base.

[0069] Preferably, one side of the first chassis of the spool faces the base. In the present application, the knot of the lace after being tied can be hidden in the inner cavity of the shaft tube. Because the depth from the inner cavity of the shaft tube to the end face of the first chassis is deep enough, the knot of the lace will not protrude from the end face of the first chassis, and therefore the knot will not affect the rotation of the spool. However, in the prior art, the spool structure that uses a guide slope to thread the thread and knots the lace outside the opening of the first chassis, because the guide slope reduces the depth and area of ​​the inner cavity of the shaft tube, the knot of the lace can easily run outside the end face of the first chassis, causing the knot to be stuck between the spool and the base, thereby preventing the spool from rotating freely and smoothly.

[0070] Preferably, the base includes a mounting flange and a retaining wall, the retaining wall protrudes from the surface of the mounting flange and surrounds an inner cavity of the base; the bottom of the shell is installed in the inner cavity of the base, and at least part of the first outlet and the second outlet of the shell are exposed outside the inner cavity of the base.

[0071] At least a portion of the first and second outlets of the housing are configured to be exposed outside the inner cavity of the base, so that the tail of the tied lace can be exposed outside the inner cavity of the base. After the lace is pulled back, the tail of the lace remaining in the outer area of ​​the housing will be wound into the groove of the spool as the spool rotates, and will not be stuck between the housing and the inner cavity of the base, causing the tie device to malfunction. Additional aspects and advantages of the present invention will be partially set forth in the following description and partially become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0073] Figure 1 It is a cross-sectional view of the housing and spool assembly and a threading path diagram of the lace in the prior art;

[0074] Figure 2 It is a top view of another housing and spool assembly and a threading path diagram of the lace in the prior art;

[0075] Figure 3 1 is a schematic structural diagram of an embodiment of a spool provided by the present invention;

[0076] Figure 4 yes Figure 3 a front view of the illustrated embodiment of the spool;

[0077] Figure 5 yes Figure 4 A cross-sectional view along the OO direction in the main view of the spool shown;

[0078] Figure 6 yes Figure 3 The intermediate state diagram of the coupling process between the spool and the lacing is shown;

[0079] Figure 7 yes Figure 6 A top view of the intermediate state shown;

[0080] Figure 8 yes Figure 7 cross-section along the middle of JJ;

[0081] Figure 9 yes Figure 3 An embodiment of the state diagram of the bobbin after being coupled with the lacing;

[0082] Figure 10 yes Figure 3 a top view of the illustrated embodiment of the spool;

[0083] Figure 11 yes Figure 10 Cross-section along the KK direction;

[0084] Figure 12 yes Figure 3 A perspective schematic diagram of the embodiment of the spool after being turned over;

[0085] Figure 13 yes Figure 12 A cross-sectional view along the CC direction in the spool shown;

[0086] Figure 14 is an exploded structural diagram of a spool-based tie-down device provided by the present invention;

[0087] Figure 15 yes Figure 14 A schematic diagram of the back structure of the tie-down device after assembly is shown;

[0088] Figure 16 yes Figure 14 A schematic diagram of the structure of the tightening device after the rotary cover is turned over;

[0089] Figure 17 yes Figure 14 A schematic diagram of the structure of the fastening device after the shell is turned over;

[0090] Figure 18 yes Figure 14 The front view of the assembly structure of the fastening device except the base and the threading state during the coupling process of the fastening device;

[0091] Figure 19 yes Figure 18 Cross-section along DD;

[0092] Figure 20 1 is an exploded structural diagram of another spool-based tightening device provided by the present invention.

[0093] Description of Figure Numbers:

[0094] 1. Spool; 10. Bottom tube; 100. Inner cavity of bobbin; 11. First chassis; 110. Opening; 12. Second chassis; 120. Groove; 122. Engaging teeth; 123. Elastic stop pin; 13. Groove; 14. Alignment mark; 101, 102. First threading hole, second threading hole; 103, 104. First wire outlet hole, second wire outlet hole; 2. Base; 21. Mounting flange; 22. Retaining wall; 20. Inner cavity of base; 3. Shell; 31, 31. First entrance, second entrance; 33, 34. First exit, second exit; 35. Alignment mark; 36. Oblique stop block; 4. Ratchet ring; 4', telescopic swing arm ring; 5, 5', rotary cover; 51, 51', retaining ring component; 511, retaining ring; 512, engaging teeth; R1, first wiring path; R2, second wiring path.

[0095] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0096] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0097] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0099] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0100] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0101] Prior Art 1

[0102] Reference Figure 1 A currently widely used spool 1310 has a first channel 1316 and a second channel 1314 formed inside. The correct threading method is: the lace 1360 passes through the first channel 1316 and the second channel 1314 in sequence and exits through the outlet 1324. However, this spool threading method also has disadvantages:

[0103] First, it is easy for the laces to be missed. Figure 1 As shown, the free end of the lace 1370 does not pass through the first channel 1316 and the second channel 1314 (shown in dashed lines) because the guidance of the lace by the first channel 1316 and the second channel 1314 changes the natural state and inertial routing of the lace, forcibly deflecting the lace to make it route along a predetermined path. As a result, sometimes the lace does not route along the predetermined path, but instead enters from the shell inlet 1322 and directly passes through the annular groove of the spool 1310 (shown in dashed lines) and then exits from the shell outlet 1324. This threading method does not achieve the coupling between the lace 1370 and the spool 1310. Moreover, this incorrect threading method is difficult to observe with the naked eye because the stop pin is installed through the center of the inner cavity of the spool, making it impossible to see the situation inside the inner cavity of the spool with the naked eye.

[0104] Secondly, to form the first and second channels inside the spool, the internal cavity of the spool must be sufficiently large. A larger internal space in the spool increases the outer diameter of the barrel, resulting in a relatively small storage space for the annular groove and a lower lace winding capacity.

[0105] Prior Art 2

[0106] Reference Figure 2Another type of spool in the prior art has a guide slope SL on one side of its barrel, and a lace outlet E is formed on the chassis on this side. The lace passes through the inner cavity of the barrel and is guided by the guide slope SL and exits to the outer area of ​​the spool through the lace outlet E. After the end of the lace is tied in the outer area of ​​the spool and the lace is pulled back, the knot T returns to the inner cavity of the barrel. However, in actual use, the knot T cannot be fixed in the barrel and moves to the outer area of ​​the spool, or the tail of the knot T is long enough to be exposed outside the lace outlet. In this case, when the base of the tightening device is assembled with the rest of the body, the exposed knot T or its tail will be stuck between the base and the spool, causing the spool to be unable to rotate freely.

[0107] The reason for this problem is that the threading hole H of the spool cannot fix the knot T, and the knot T can move in the inner cavity of the shaft tube; and because of the existence of the guide slope SL, the inner cavity of the shaft tube becomes smaller, and the depth from the bottom of the inner cavity of the shaft tube to the lacing outlet E is relatively shallow, the knot T can easily slide along the guide slope SL to the outside of the lacing outlet E, and then get stuck between the base and the spool, hindering the rotation of the spool.

[0108] In order to solve the above problems, the present invention provides a novel bobbin structure. A bobbin and a tie-down device based on the bobbin according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings.

[0109] Example 1

[0110] Reference Figure 3 The spool 1 for coupling and winding the lace provided in an embodiment of the present invention includes a barrel 10 and a first chassis 11 and a second chassis 12 located at opposite ends of the barrel, the first chassis 11 and the second chassis 12 are parallel to each other and extend radially outward relative to the barrel 10; a groove 13 is formed in the outer area of ​​the barrel 10 between the first chassis 11 and the second chassis 12 for winding the lace.

[0111] like Figure 3-5 As shown, the shaft cylinder 10 has an inner cavity 100, and the side wall of the shaft cylinder 10 is provided with a first threading hole 101, a second threading hole 102, a first outlet hole 103 and a second outlet hole 104. With the symmetry plane S of the shaft cylinder 10 as the reference plane, the first threading hole 101 and the first outlet hole 103 are located on opposite sides of the shaft cylinder 10 (i.e., on both sides of the reference plane S), and the second threading hole 102 and the second outlet hole 104 are also located on opposite sides of the shaft cylinder 10. Further, as Figure 4 and Figure 5 As shown, the first threading hole 101 and the second threading hole 102 are set at different axial heights of the shaft tube, and the axial height difference between the centers of the two threading holes 101 and 102 is d. The first threading hole 101 and the second threading hole 102 are trumpet-shaped structures, and the size of the exit end Ex of the threading holes 101 and 102 is smaller than the size of the entry end En. Figure 6-8As shown, when the lace is coupled to the spool 1, the first free end L1 of the lace passes through the first threading hole 101 and enters the inner cavity 100 of the shaft cylinder 10, and then follows the first wiring path R1 to reach the first wire outlet hole 103; the second free end L2 of the lace passes through the second threading hole 102 and enters the inner cavity 100 of the shaft cylinder 10, and then follows the second wiring path R2 to reach the second wire outlet hole 104; the first wiring path R1 and the second wiring path R2 are both opposite wiring paths, and are basically straight lines. The first wiring path R1 and the second wiring path R2 are in a separated three-dimensional intersection state; as shown Figure 8 As shown, there is a slight distance difference between the second free end L2 and the first free end L1 of the lace at the spatial intersection C. Of course, in other embodiments, it can also be set that the lower edge of the second free end L2 of the lace is in zero distance contact with the upper edge of the first free end L1 at the spatial intersection C. The first threading hole 101 and the second threading hole 102 are set at different axial heights of the shaft tube, so that the first and second free ends L1 and L2 of the lace can freely route in space without colliding with each other when threading at the same time, presenting a Figure 6 and Figure 8 The free ends L1 and L2 of the lace are passed through the inner cavity of the shaft tube 10, and then tied and pulled back so that the knot remains in the inner cavity of the shaft tube 10. Figure 9 Preferably, the size of the exit end Ex is less than or equal to the size of the knot, so that after the tied lace is pulled back into the inner cavity of the shaft tube, the knot can be stuck at the exit end Ex of the threading hole, which is more conducive to the fixation of the knot.

[0112] When the first free end L1 and the second free end L2 of the lace are threaded in opposite directions along the first routing path R1 and the second routing path R2, respectively, the ideal state is to configure the central axis of the first threading hole 101 to be collinear with the central axis of the first outlet hole 103, and the central axis of the second threading hole 102 to be collinear with the central axis of the second outlet hole 104. In this structure, the threading holes and the opposite outlet holes are strictly aligned, but this requires that the first outlet hole and the second outlet hole must also be located at different axial heights of the shaft tube, which makes the structure more complicated during processing and forming. Therefore, in order to facilitate processing and forming, as long as the lace can reach the hole space of the first outlet hole 103 along a predetermined straight path after entering the inner cavity of the shaft tube through the first threading hole 101, and the lace can also reach the hole space of the second outlet hole 104 along a predetermined straight path after entering the inner cavity of the shaft tube through the second threading hole 102; here, "predetermined straight path" refers to the routing direction of the lace in the corresponding threading hole. This structure does not require strict alignment between the spool outlet hole and its corresponding threading hole, making it easy to process and shape. Figure 10-11The up-down, left-right relationship among the first threading hole 101, the second threading hole 102, the first outlet hole 103 (not shown), and the second outlet hole 104 is such that as long as the uppermost edge of the exit end Ex of the first threading hole 101 is not higher than the uppermost edge of the first outlet hole 103 (not shown), and the lowermost edge of its exit end Ex is not lower than the lowermost edge of the first outlet hole 103 (not shown); and the uppermost edge of the exit end Ex of the second threading hole 102 is not higher than the uppermost edge of the second outlet hole 104, and the lowermost edge of its exit end Ex is not lower than the lowermost edge of the second outlet hole 104, it can satisfy that all the laces that pass through the first threading hole 101 and the second threading hole 102 and enter the inner cavity 100 of the shaft tube 10 can reach the hole area of ​​the opposite outlet hole in a straight line. In order to facilitate processing and molding, such as Figure 12 and 13 As shown, in this embodiment, the first outlet hole 103 and the second outlet hole 104 are arranged in the same plane parallel to the first chassis, and the two outlet holes 103 and 104 are symmetrically arranged about the symmetry plane S of the shaft cylinder 10, that is, the two outlet holes are consistent in size and shape, both of which are rounded rectangles; Figure 3-5 As shown, the two threading holes 101 and 102 are both trumpet-shaped, but are arranged at different axial heights of the shaft tube; and the projection lines of the central axes S1 and S2 of the first threading hole 101 and the first outlet hole 103 on the plane where the first chassis 11 is located are parallel to each other. It is preferred to set the size of the outlet holes 103 and 104 larger than the size of the two threading holes 101 and 102, as shown in FIG. Figure 11 As shown, in this embodiment, the axial height of the two wire outlet holes 103 and 104 is basically equal to the axial height of the groove 13, so that the uppermost edge and the lowermost edge of the exit end Ex of the two threading holes are both located in the hole area of ​​the wire outlet hole, and are convenient for forming; and the wire outlet holes 103 and 104 are arranged to be large enough to facilitate the smooth pulling back of the knot of the lace after it is tied into the inner cavity of the shaft tube.

[0113] Further, such as Figure 3 As shown, the first chassis 11 includes an opening 110, which is connected to the inner cavity 100 of the shaft tube 10, so that the entire inner cavity 100 is open to the external area. The opening 110 is used to observe the routing of the lace in the inner cavity of the shaft tube to improve the threading accuracy.

[0114] like Figure 12 and 13 As shown, a cylindrical recess 120 is defined in the center of the second chassis 12. An elastic retaining pin 123 is disposed on the bottom of the recess, extending toward the exterior of the spool. Engaging teeth 122 are disposed on the end surface of the second chassis 12, surrounding the periphery of the recess 120. The bottom surface of the inner cavity of the barrel 10 is in contact with the bottom surface of the recess 120.

[0115] Reference Figure 3The bobbin is also provided with an alignment mark 14, which is preferably an arrow.

[0116] Example 2

[0117] This embodiment provides a fastening device based on the spool shown in embodiment 1, such as Figure 14 As shown, it includes a base 2, a spool 1, a shell 3, a ratchet ring 4, a screw cover 5 and a decorative piece 6, wherein the structure of the spool 1 is the same as the spool in Example 1; the decorative piece 6 is arranged on the surface of the screw cover 5, and the connection method between the spool 1 and the screw cover 5, the connection method between the screw cover 5 and the shell 3, the structure of the ratchet ring 4 and the connection method between it and the shell 3 can refer to the contents of patent document CN208993976U.

[0118] The base 2 can be fixedly mounted on a shoe upper, a shoe tongue, a shoe heel, a garment or a bag. Specifically, the base 2 includes a mounting flange 21 and a retaining wall 22. The retaining wall 22 is protruding from the surface of the mounting flange 21 and surrounds an inner cavity 20 of the base 2. The bottom of the housing 3 (i.e., the end away from the screw cap) is mounted in the inner cavity 20 of the base 2. The back structure of the assembled fastening device is as follows: Figure 15 As shown, refer to Figure 15 The first outlet 33 and the second outlet 34 of the shell 3 are at least partially exposed outside the inner cavity of the base and are higher than the retaining wall 22. For other structures of the base 2 and its connection method with the shell 3, please refer to patent CN217524127U.

[0119] like Figure 16 As shown, the rotary cap 5 is also integrally formed with a retaining ring member 51. The retaining ring member 51 cooperates with the elastic retaining pin of the spool 1 to form the gear switching mechanism of the tie-down device. The retaining ring member 51 has a hollow column at its center, and a retaining ring 511 is provided on the side wall of the hollow column. The retaining ring 511 cooperates with the elastic retaining pin 123 of the spool 1 to realize the gear switching function of the tie-down device. The retaining ring member 51 is also provided with a circle of engaging teeth 512 corresponding to the engaging teeth 122 around the hollow column. The rotary cap 5 and the spool 1 are detachably connected through the meshing of the engaging teeth.

[0120] Further, refer to Figure 17 The housing 3 has an inner area I, and the spool 1 is rotatably disposed in the inner area I. The housing 3 includes two oppositely disposed first inlets 31 and second inlets 32 for the lace to enter the inner area I from the outer area O of the housing 3; the first inlet 31 and the second inlet 32 ​​are both lug structures and are symmetrically disposed; the housing 3 also has a first outlet 33 and a second outlet 34 for the lace to exit the inner area I of the housing 3 to the outer area O of the housing. Figure 17As shown, with the symmetry plane SS of the shell 3 as the reference plane, the first inlet 31 and the first outlet 33 are located on opposite sides of the shell (i.e. on both sides of the reference plane SS), and the second inlet 32 and the second outlet 34 are located on opposite sides of the shell. The shell 3 is further provided with an alignment mark 35, which is used in cooperation with the alignment mark 14 of the spool 1 to indicate the alignment position of the shell 3 with the spool 1.

[0121] When the tightening device of the present embodiment is assembled, the base 2 is first fixed on the article to be tightened, and then the spool 1, the shell 3, the pawl ring 4 and the screw cap 5 are assembled together, and then the assembly of the spool 1, the shell 3, the pawl ring 4 and the screw cap 5 is turned over to perform the threading operation.

[0122] When threading, first rotate the spool 1 located in the inner region of the shell 3, align the alignment mark 14 with the alignment mark 35 of the shell, so that the first threading hole 101 of the spool is aligned with the first inlet 31 of the shell, the second threading hole 102 of the spool is aligned with the second inlet 32 of the shell, the first outlet hole 103 of the spool is aligned with the first outlet 33 of the shell, and the second outlet hole 104 of the spool is aligned with the second outlet 34 of the shell. In the present embodiment, due to the relatively large axial height of the inlets 31, 32 of the shell 3, at least part of the first threading hole 101 of the spool 1 is located in the opening region of the first inlet 31 of the shell 3, and at least part of the second threading hole 102 of the spool 1 is located in the opening region of the second inlet 32 of the shell 3, so that when the shell 3 and the spool 1 are in the aligned position for threading, as shown in Figure 18 and 19 shown, the first free end L1 of the tie is routed: after passing through the first inlet 31 and the first threading hole 101, it enters the inner cavity of the shaft cylinder 10 along the first routing path R1 to the first outlet hole 103, and then exits to the outer region O of the shell from the first outlet 33; the second free end L2 of the tie is routed: after passing through the second inlet 32 and the second threading hole 102, it enters the inner cavity of the shaft cylinder 10 along the second routing path R2 to the second outlet hole 104, and then exits to the outer region O of the shell 3 from the second outlet 34, wherein the first routing path R1 and the second routing path R2 are separated and intersect in three dimensions. After the free ends L1, L2 of the tie are knotted in the outer region O of the shell 3, the tie is pulled back so that the knot after knotting is clamped in the inner cavity of the spool 1, and thus the tie is effectively coupled with the spool 1.

[0123] After the coupling of the tie 7 with the spool 1 is completed according to the above threading method, the shell 3 is fixed on the base 2. In this way, the assembly of the entire tightening device is completed.

[0124] By pressing the screw cap, the tightening device is in the first gear, the screw cap is connected to the spool, and rotating the screw cap in the tightening direction drives the spool to reel the lace into its groove; by pulling the screw cap, the tightening device is in the second gear, at this time the screw cap is disengaged from the spool, the spool can rotate freely, and the lace can be loosened by pulling the lace.

[0125] In this embodiment, the first free end L1 and the second free end L2 of the lace can be two free ends of one lace, or one free end of two laces.

[0126] This embodiment adopts the currently commonly used pawl-ratchet as the anti-return mechanism, and can also adopt the groove-telescopic swing arm ring-oblique block as the anti-return mechanism, such as Figure 20 As shown, the telescopic swing arm ring 4' is fixed to the housing 3 by a snap-fit ​​structure, and the oblique stopper 36 is integrally formed and set on the housing 3. Specifically, the structure of the telescopic swing arm ring-oblique stopper and its anti-return mechanism can be referred to patent CN216723374U. In addition, Figure 20 The tie-down device shown is Figure 14 The fastening device shown is also different: the retaining ring component 51 ′ is manufactured separately from the screw cap and then connected together by a snap-fit ​​structure. The retaining ring component 51 ′ also includes a retaining ring and engaging teeth, and the engaging teeth realize the detachable connection between the spool and the screw cap.

[0127] In other embodiments, the anti-return mechanism can also adopt the groove-pin elastic assembly-anti-deflection component in patent CN216256587U, and can also adopt the swing arm-groove-stop block structure in patent CN215837385, that is, the spool structure is suitable for all tightening devices that use elastic stop pins as gear switching mechanisms.

[0128] In this embodiment, the items to be tied can be shoes, clothes, hats and bags, or various bags, etc. The items to be tied use the above-mentioned fastening device to tighten the laces to close the openings, and when using the above-mentioned fastening device, all the technical effects of the above-mentioned lacing device can be achieved, which will not be described one by one here.

[0129] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0130] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields under the inventive concept of the present application are included in the patent protection scope of the present application.

Claims

1. A spool for coupling and winding a lace; the spool comprises a barrel and a first chassis and a second chassis located at opposite ends of the barrel, wherein an outer area of ​​the barrel between the first chassis and the second chassis forms a groove for winding the lace; characterized in that The shaft cylinder has an inner cavity, and a side wall of the shaft cylinder is provided with a first threading hole, a second threading hole, a first wire outlet hole, and a second wire outlet hole, wherein the first threading hole and the first wire outlet hole are located on opposite sides of the shaft cylinder, and the second threading hole and the second wire outlet hole are located on opposite sides of the shaft cylinder; A first wiring path is formed between the first threading hole, the inner cavity of the shaft cylinder and the first outlet hole, and a second wiring path is formed between the second threading hole, the inner cavity of the shaft cylinder and the second outlet hole. The first wiring path and the second wiring path are separated and three-dimensionally intersected. The centers of the first threading hole and the second threading hole are located at different axial heights of the shaft cylinder; The first chassis includes an opening, and the opening is connected to the inner cavity of the shaft cylinder; Through the opening of the first chassis and the inner cavity of the shaft cylinder, the lace passing through the first wiring path and the second wiring path can be seen from the outside.

2. The spool according to claim 1, wherein The first threading hole and the second threading hole include an entry end and an exit end, and the size of the exit end is smaller than the size of the entry end.

3. The spool according to claim 1, wherein The first routing path and the second routing path are both parallel to the first chassis or the second chassis.

4. The spool according to claim 1, wherein The first routing path and the second routing path are both opposite routing paths.

5. The spool according to claim 1, wherein The size of the first wire outlet hole is larger than that of the first wire threading hole, and the size of the second wire outlet hole is larger than that of the second wire threading hole.

6. A tie-down device comprising a spool, comprising: a housing having an interior region; a rotary cover rotatably connected to the housing; A spool for coupling and winding a lace is rotatably disposed within the interior area of ​​the housing; the spool comprises a barrel and a first chassis and a second chassis located at opposite ends of the barrel, wherein an outer area of ​​the barrel between the first chassis and the second chassis forms a groove for winding the lace; characterized in that The housing has a first inlet and a second inlet for the lace to enter the interior area of ​​the housing from the exterior area of ​​the housing; the housing also has a first outlet and a second outlet for the lace to exit the interior area of ​​the housing to the exterior area of ​​the housing; the first inlet and the first outlet are located on opposite sides of the housing, and the second inlet and the second outlet are located on opposite sides of the housing; The shaft cylinder has an inner cavity, and a side wall of the shaft cylinder is provided with a first threading hole, a second threading hole, a first wire outlet hole, and a second wire outlet hole, wherein the first threading hole and the first wire outlet hole are located on opposite sides of the shaft cylinder, and the second threading hole and the second wire outlet hole are also located on opposite sides of the shaft cylinder; the centers of the first threading hole and the second threading hole are located at different axial heights of the shaft cylinder; When the spool is rotated to reach an aligned position between the housing and the spool, the first inlet of the housing, the first threading hole of the spool, the inner cavity of the barrel, the first thread outlet hole of the spool, and the first outlet of the housing constitute a first threading path of the fastening device; the second inlet of the housing, the second threading hole of the spool, the inner cavity of the barrel, the second thread outlet hole of the spool, and the second outlet of the housing constitute a second threading path of the fastening device, wherein the first threading path of the fastening device and the second threading path of the fastening device are separated and three-dimensionally intersected; The first chassis includes an opening, and the opening is connected to the inner cavity of the shaft cylinder; Through the opening of the first chassis and the inner cavity of the shaft cylinder, the lace passing through the first wiring path and the second wiring path can be seen from the outside.

7. The tie-down device according to claim 6, wherein: The first wire outlet hole and the second wire outlet hole of the spool are symmetrically arranged.

8. The tie-down device according to claim 6, wherein: The end face of the second chassis of the spool is also provided with a stop pin, and the rotary cover is provided with a retaining ring component. The retaining ring component is made integrally with the rotary cover or is made separately and then connected together. The retaining ring component cooperates with the stop pin to form a gear switching mechanism of the tightening device.

9. The tie-down device according to claim 6, wherein: The bobbin and the housing include alignable markings to indicate that the first threading hole of the bobbin is aligned with the first inlet of the housing, the second threading hole of the bobbin is aligned with the second inlet of the housing, the first wire outlet hole of the bobbin is aligned with the first outlet of the housing, and the second wire outlet hole of the bobbin is aligned with the second outlet of the housing.

10. The tie-down device according to claim 6, wherein: The fastening system also includes a base that is mounted on the wearable article independently of the other components of the fastening system.

11. The tie-down device according to claim 10, wherein: The base includes an inner cavity; the bottom of the shell is installed in the inner cavity of the base, and at least part of the first outlet and the second outlet of the shell are exposed outside the inner cavity of the base.

Images