Detachable automatic tightening shoe tightner

Abstract

Apparatus and associated methods relate to a hands-free rotational shoestring tightening device (RSTD) configured to adjust a tension of a shoestring by rotating a wheel against the ground. In an illu

Description

DETACHABLE AUTOMATIC TIGHTENING SHOE TIGHTNERCROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Application Serial No. 63 / 584,704, titled “DETACHABLE AUTOMATIC TIGHTENING SHOE TIGHTNER,” filed by Gregory Johnson, on September 22, 2023.

[0002] This application incorporates the entire contents of the foregoing application(s) herein by reference.

[0003] The subject matter of this application may have common inventorship with and / or may be related to the subject matter of the following:• U.S. Patent Application Serial No. 13 / 584,468, titled “Automated Tightening Shoe,” filed by Gregory Glenn Johnson, et al., on August 13, 2012, and issued as U.S. Patent No. 8,904,673 on December 9, 2014;• U.S. Patent Application Serial No. 10 / 732,664, titled “Automated Tightening Shoe,” filed by Gregory Glenn Johnson on Dec. 9, 2003;• U.S. Patent Application Serial No. 10 / 093,918, titled “Automated tightening shoe,” filed by Gregory Glenn Johnson on March 7, 2002, and issued as U.S. Patent No. 6,896,128;• U.S. Patent Application Serial No. 09 / 675,607, titled “Automated tightening shoe,” filed by Gregory Glenn Johnson on Sep. 29, 2000, and issued as U.S. Patent No. 6,467,194;• U.S. Patent Application Serial No. 09 / 288,476, titled “Automated tightening and loosening shoe,” filed by Gregory Glenn Johnson on April 8, 1999, and issued as U.S. Patent No. 6,032,387;• U.S. Patent Application Serial No. 11 / 212,283, titled “Tightening shoe,” filed by Gregory Glenn Johnson, et al., on Aug. 26, 2005, and issued as U.S. Patent No. 7,721,468;• U.S. Patent Application Serial No. 13 / 199,078, titled “Automated tightening shoe,” filed by Gregory Glenn Johnson on Aug. 18, 2011, and issued as U.S. Patent No. 8,904,672;• U.S. Patent Application Serial No. 12 / 004,895, titled “Automated tightening shoe,” filed by Gregory Glenn Johnson on Dec. 21, 2007, and issued as U.S. Patent No. 7,676,957;• U.S. Patent Application Serial No. 11 / 818,370, titled “Automated tightening shoe,” filed by Gregory Glenn Johnson on June 14, 2007, and issued as U.S. Patent No. 7,661,205;• U.S. Patent Application Serial No. 17 / 935,371, titled “Shoelace Tightening System,” filed by Gregory Glenn Johnson on Sep. 26, 2022; and• U.S. Patent Application Serial No. 18 / 321,886, titled “Singlehanded Shoelace Tightening System,” filed by Gregory Glenn Johnson on May 23, 2023.

[0004] This application incorporates the entire contents of the foregoing application(s) herein by reference.TECHNICAL FIELD

[0005] Various embodiments relate generally to detachable hands-free tightening systems for shoelace fastening.BACKGROUND

[0006] Shoes serve as essential apparel, offering protection, support, and style to individuals across cultures and generations. Early civilizations crafted rudimentary shoes from natural materials like leather, plant fibers, and animal hides. Nowadays, designs and construction methods of shoes may include a wide array of styles, shapes, and functionalities.

[0007] For example, methods of securing shoes onto a user’s feet may be evolved over time. In various examples, footwear may include mechanisms to ensure a snug and comfortable fit to various sizes of the user’s feet. In some of the mechanisms, shoelaces or shoestrings may be used. For example, shoelaces may include a flexible cord (e.g., made from cotton, nylon, or other synthetic materials). For example, the flexible cord may be threaded through pairs of eyelets and / or loops embedded on opposite sides of the shoe's upper surface. By tightening and tying the shoelaces, for example, a wearer may adjust a tension around the wearer’s foot. For example, the adjustable tension may provide a personalized fit tailored to their comfort and performance needs.

[0008] Shoestrings may sometimes be appreciated in footwear fastening for their simplicity, reliability, and adaptability, for example. Their straightforward design, for example, may advantageously be accommodating to a wide range of foot shapes and sizes.SUMMARY

[0009] Apparatus and associated methods relate to a hands-free rotational shoestring tightening device (RSTD) configured to adjust a tension of a shoestring by rotating a wheel against the ground. In an illustrative example, the RSTD may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of a shoe. The base module, for example, may include an opening at the proximal end of the shoe. The RSTD may include, for example, a roto component configured to releasably couple into the opening of the base module. The roto component may include a wheel. The roto component may include an axle shaft coupled through a hub of the wheel. In an assembled state, for example, the roto component is releasably locked within a cavity defined by the base module and the lock module. Various embodiments may advantageously provide replaceable parts of the roto component.

[0010] Apparatus and associated methods relate to a hands-free rotational shoestring tightening device (RSTD) configured to adjust a tension of a shoestring by rotating a wheel against the ground. In an illustrative example, the RSTD may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of a shoe. For example, the base module may include a cavity configured to receive a shoelace of the shoe. For example, the base module may include a first aperture connected to the cavity and disposed at a bottom surface of the base module defining a first lumen, a second aperture connected to the cavity and disposed at a side of the base module defining a second lumen. For example, the first lumen may receive awheel in an assembled state, and the second lumen may receive an axle shaft in the assembled state. For example, during assembly, the axle shaft is inserted into the second lumen after the wheel is inserted into the first lumen. Various embodiments may advantageously provide a quick install mechanism of the wheel to the axle shaft.

[0011] Apparatus and associated methods relate to a hands-free rotational shoestring tightening device (RSTD) configured to adjust a tension of a shoestring by rotating a wheel against the ground. In an illustrative example, the RSTD may include an attachment base disposed at a proximal end of a longitudinal axis of a shoe. For example, the RSTD may include a roto component disposed below the attachment base. For example, the roto component may include a rotatable wheel. For example, the roto component may include an axle assembly coupled to a hub of the rotatable wheel. For example, the axle assembly may be configured to receive a shoelace of the shoe. For example, the rotatable wheel may be coupled to a unitary housing at a bottom surface and the proximal end of the shoe. For example, the axle assembly may be releasably coupled to the attachment base with two coupling features (e.g., screws).

[0012] Apparatus and associated methods relate to a hands-free rotational shoestring tightening device (RSTD) configured to adjust a tension of a shoestring by rotating a wheel against the ground. In an illustrative example, the RSTD may include an axle assembly configured to receive a shoelace of the shoe. For example, the axle assembly may include a rotatable wheel and an axle shaft configured to receive the shoelace. For example, the RSTD may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of a shoe. For example, the base module may include a top load cavity configured to receive configured to receive the axle assembly. For example, the RSTD may include a bottom opening to the cavity configured to expose the rotatable wheel at the bottom of the base module after the axle assembly is received within the top load cavity.

[0013] Various embodiments may achieve one or more advantages. For example, some embodiments may advantageously provide a modular replaceable axle assembly unit.

[0014] The details of various embodiments are set forth in the accompanying drawings and the description below. Other features and advantages will be apparent from the description and drawings, and from the claims.BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG. 1 depicts an exemplary detachable automatic shoelace tightener (DHFST) employed in an illustrative use-case scenario.

[0016] FIG. 2 A, FIG. 2B, FIG 2C, and FIG. 2D show exemplary installation procedures of an exemplary backloaded DHFST into a shoe.

[0017] FIG. 3A, FIG. 3B, and FIG. 3C are schematic diagrams depicting an exemplary latch module of an exemplary backloaded DHFST.

[0018] FIG. 4 A, FIG. 4B, and FIG. 4C show exemplary installation procedures of an exemplary side loaded DHFST into a shoe.

[0019] FIG. 5 A, FIG. 5B, FIG. 5C, FIG. 5D, and FIG. 5E are schematic diagrams depicting various components of an exemplary side loaded DHFST.

[0020] FIG. 6A and FIG. 6B show exemplary installation procedures of an exemplary coupler installed DHFST into a shoe.

[0021] FIG. 7 A and FIG. 7B depict various components of an exemplary coupler installed DHFST into a shoe.

[0022] FIG. 8A and FIG. 8B show exemplary installation procedures of an exemplary top loaded DHFST into a shoe.

[0023] FIG. 9 is an assembly diagram depicting various components of an exemplary bearing operated DHFST.

[0024] FIG. 10A and FIG. 10B are assembly diagrams depicting an exemplary bushing operated DHFST.

[0025] Like reference symbols in the various drawings indicate like elements.DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0026] To aid understanding, this document is organized as follows. First, to help introduce discussion of various embodiments, various exemplary embodiments of a detachable hands-free shoelace tightener DHFST are introduced with reference to FIG. 1. Second, that introduction leads into a description with reference to FIGS. 2A-3C of some exemplary embodiments of a backloaded DHFST. Third, with reference to FIGS. 4A-5E, a shoe is described in application to an exemplary sideloaded DHFST. Fourth, with reference to FIGS. 6A-7B, the discussion turns to exemplary embodiments that illustrate various coupling mechanisms applicable to install some embodiments of the DHFST. Fifth, and with reference to FIG. 8A-B, this document describes an exemplaryimplementation of a top-loaded DHFST. Sixth, this disclosure turns to a review of schematics and a discussion of axle assembly in application in exemplary DHFST with reference to FIGS. 9-10B. Finally, the document discusses further embodiments, exemplary applications and aspects relating to DHFST.

[0027] FIG. 1 depicts an exemplary detachable hands-free shoelace tightener (DHFST) employed in an illustrative use-case scenario. In this example, a user 105 is wearing a foot actuated shoelace tightening shoe (FASTS 110).

[0028] In this scenario 100, the FASTS 110 includes shoelace 115. For example, the user 105 may use the shoelace 115 to adjust a size of the FASTS 110. A DHFST 120 is disposed at a proximal end of the FASTS 110. In some implementations, the shoelace 115 is mechanically coupled to the DHFST 120.

[0029] The DHFST 120, in this example, include an axle assembly 125. For example, axle assembly 125 may be mechanically coupled to the shoelace 115. For example, the axle assembly 125 may be configured to control a length of the shoelace 115 to be wrapped around the axle assembly 125. For example, by reducing the length of the shoelace 115 left out of the axle assembly 125, the axle assembly 125 may effectively control a tension of the shoelace 115. In some examples, the user 105 may adjust the tension to fit the user 105’s foot.

[0030] In this example, the user 105 may actuate the axle assembly 125 by rolling the proximal end (e.g., the heel) of the FASTS 110 to tighten the shoelace 115. In some embodiments, the axle assembly 125 may include a rotatable wheel 150 disposed at the proximal end of a longitudinal axis. In this example, the rotatable wheel 150 protrudes out of the FASTS 110 at the proximal end of a bottom side of the FASTS 110. For example, as indicated by an arrow 130, the user 105 may tighten the shoelace 115 by rubbing the axle assembly 125 against a surface (e.g., a ground surface).

[0031] The rotatable wheel 150, for example, may be configured to wind or unwind the shoelace 115. For example, the user may rotate the axle assembly 125 in a first direction (e.g., clockwise, counterclockwise, forward, backward) to tighten the shoelace 115 and in a second direction (e.g., opposite the first direction) to loosen the shoelace 115. The axle assembly 125 may, in some examples, include a knob or a handle configured to facilitate the rotation by the user. In some embodiments, the axle assembly 125 may include a quick release button to loosen the shoelace 115. In some examples, the rotatable wheel 150 may be a ratchet wheel configured to rotate only in the first direction.

[0032] In various implementations, the DHFST 120 may be releasably coupled to the FASTS 110. As shown, the DHFST 120 may include a backload module 135 A configured to couple to a static module at the proximal end of the FASTS 110. In some examples, the DHFST 120 may include aside module 135B configured to couple to a static module and the axle assembly 125 from a side of the FASTS 110. In some examples, the DHFST 120 may include a fixation unit 135C configured to couple a releasable module to a static module at the proximal end of the FASTS 110 using one or more coupling components. In some examples, the DHFST 120 may include a top loading unit 135D configured to couple to a static module from a top of the sole at the proximal end of the FASTS 110. In some examples, the DHFST 120 may include a top loading unit 135D configured to couple to a static module from a top of the sole at the proximal end of the FASTS 110. In some embodiments, the axle assembly 125 may include a bushing mechanism 140 configured to actuate a roto component 145 of the axle assembly 125.

[0033] Various embodiments may advantageously provide replaceable rotation components of the axle assembly 125. For example, the rotation components may be subjected to most wear and tear (e.g., due to actuation as shown as the arrow 130). In some examples, the replacement capabilities may advantageously provide a “skin changing” capability for the user 105. For example, the user 105 may selectively replace the backload module 135 A with different colors and / or patterns to enhance personality of the FASTS 110.

[0034] FIG. 2A, FIG. 2B, FIG 2C, and FIG. 2D show exemplary installation procedures of an exemplary backloaded DHFST (BDHFST) into a shoe. As shown in FIG. 2 A, a BDHFST 200 includes a base module 205 permanently attached to a shoe heel 210 (e.g., at the proximal end of the longitudinal axis). The base module 205 may be permanently attached to the shoe heel 210 in various ways. In some embodiments, the base module 205 may be configured to be fixedly attached to the shoe heel 210 using an adhesive material (e.g., glue, tape, Velcro). In some embodiments, the base module 205 may be configured to fasten to the shoe heel 210 using a mechanical connection (e.g., screws, nails, clips). In some embodiments, the base module 205 may be configured to integrate with the shoe heel 210 using a molding process, such as injection molding, compression molding, or thermoforming. In some embodiments, the base module 205 may be configured to stitch to the shoe heel 210 using, for example, a thread, a wire, a string, or other stitching materials.

[0035] The axle assembly 125, as shown, is coupled to the shoelace 115 of the shoe. For example, each of the shoelace 115 may be releasably coupled to a coupling feature 230 of the axle assembly 125. For example, the coupling feature 230 may be disposed at both ends of an axle shaft of the axle assembly 125. As an illustrative example, the axle assembly 125 may be configured to tighten the shoelace 115 by rotating in a first direction. For example, the axle assembly 125 may have a threaded surface that engages with a corresponding shoelace (of the shoelace 115). As the axle assembly 125 rotates, for example, the axle assembly 125 may wrap the shoelace 115 around theaxle shaft to reduce a length of the shoelace 115 outside of the BDHFST 200, thereby tightening the shoelace 115.

[0036] In some implementations, the axle assembly 125 may also be configured to loosen the shoelace 115 by rotating in a second direction opposite to the first direction. For example, the axle assembly 125 may have a release mechanism that disengages the threads on the shoelace 115 when rotated in the second direction. As the axle assembly 125 rotates, it may unwrap the shoelace 115 away from the axle assembly 125, thereby loosening them.

[0037] In some embodiments, the axle assembly 125 may include a ratchet wheel. For example, the ratchet wheel may be configured to limit a rotation direction of the axle assembly 125. For example, the ratchet wheel may limit the axle assembly 125 to rotate only in a direction of tightening the shoelace 115. For example, the BDHFST 200 may include another untightening mechanism (e.g., a tension release button) to loosen the tension at the shoelace 115.

[0038] A lock module 215 includes a first component 220 and a second component 225. For example, the lock module 215 may be configured to slide into a cavity 235 of the base module 205 as shown in FIG. 2B. For example, the lock module 215 may secure the axle assembly 125 in the cavity of the base module 205 after the axle assembly 125 is installed within the cavity 235 of the base module 205. The first component 220 and the second component 225 may, for example, be made of metallic materials (e.g., steel, aluminum, titanium). The first component 220 and the second component 225 may, for example, include a plastic (e.g., polyethylene, polypropylene, polycarbonate).

[0039] As shown, the first component 220 and the second component 225 may be coupled together to form two jaws of a bipartite clamp. For example, the first component 220 and the second component 225 may be configured to snap together or detach using a locking mechanism (e.g., a spring-loaded latch, a magnet, a hook). After the first component 220 and the second component 225 are coupled, the lock module 215 may connect the axle assembly 125 and the base module 205. For example, the connection between the lock module 215, the axle assembly 125 and the base module 205 may fixed the relative positions of the BDHFST 200 at the shoe heel.

[0040] The lock module 215 may, in some implementations, be configured to provide electrical connectivity between the base module 205. For example, the lock module 215 may have contacts or wires that connect to corresponding contacts or wires on the base module 205 (e.g., to provide electronic functionalities). In some implementations, the lock module 215 may be configured to transmit and / or receive power and data with the base module 205. As an illustrative example, the base module 205 may be coupled to a battery. For example, the lock module 215 may be connected to a microcontroller and / or a communication module.

[0041] As shown in FIG. 2B, the axle assembly 125 is slidably coupled into the cavity 235. For example, the user 105 may slide the axle assembly 125 from the proximal end of the shoe towards the distal end of the shoe into an opening of the cavity 235. After this, for example, the user 105 may pull the shoelace 115 to securely fasten the axle assembly 125 within the cavity 235. As shown, the FASTS 110 may have a width of W along a lateral axis. For example, the rotatable wheel 150 of the BDHFST 200 may be disposed at a center of the lateral axis of the FASTS 110. For example, the axle assembly 125 may be connected to the rotatable wheel 150 through a hub of the rotatable wheel 150.

[0042] As shown in FIG.2C, the first component 220 and the second component 225 are combined to form the lock module 215. For example, the lock module 215 may latch (e.g., clamp) onto an axle 240 (as shown in FIG. 2B) of the axle assembly 125. For example, the lock module 215 may be configured to releasably couple to the axle assembly 125. In some embodiments, the lock module 215 may include latching features (e.g., a collar extending from a top surface of the cavity 235) mating with features of the base module 205 to secure a position of the lock module 215 relative to the base module 205. Accordingly, for example, the lock module 215 may advantageously couple the axle assembly 125 to the base module 205. Various features of the lock module 215 are described with reference to FIGS. 3A-C below.

[0043] In this example, the first component 220 includes a locking feature 250 at a top surface of the first component 220. For example, the locking feature 250 may be configured to, after assembled with the base module 205, engage a mating feature 255 (as shown in FIG. 2D) of the base module 205. For example, the locking feature 250 and the mating feature 255 may securely hold the axle assembly 125 and the lock module 215 within the cavity 235.

[0044] As shown in FIG. 2D, after installation of the lock module 215 to the base module 205, the axle assembly 125 includes an aperture (as described with reference to FIGS. 3 A-C) configured to allow a rotatable wheel 150 of the axle assembly 125 to protrude out of a bottom of the heel of the FASTS 110. For example, the user 105 may actuate the rotatable wheel 150 against a surface 245 to tighten the shoelace 115 in a first direction. For example, the user 105 may actuate the rotatable wheel 150 against the surface 245 to loosen the shoelace 115 in a second direction.

[0045] In various implementations, an automatic shoestring tightening device (e.g., the BDHFST 200) may include an axle assembly having a rotatable wheel and an axle shaft defining a rotational axis. For example, the axle assembly may be actuated to tighten and loosen a shoelace of a shoe.

[0046] The automatic shoestring tightening device, for example, may include a lock module (e.g., the lock module 215) configured to slidably and releasably couple to an attachment base (e.g., the base module 205) permanently attached at a heel of a shoe (e.g., the FASTS 110) from a distal end to a proximal end of the shoe. For example, the lock module may include a first engagementmember (e.g., the locking feature 250) configured to releasably engage a coupling feature (e.g., the mating feature 255) of the attachment base. For example, the lock module may also include a second engagement member (the axle hook 260) configured engage to the axle assembly around the rotational axis. For example, when the lock module engages the attachment base, (1) the first engagement member is coupled to the attachment base, and (2) the second engagement member is coupled to the axle assembly, such that the axle assembly is releasably locked within the attachment base.

[0047] FIG. 3 A, FIG. 3B, and FIG. 3C are schematic diagrams depicting an exemplary latch module of an exemplary backloaded DHFST. FIGS. 3A-B shows an exemplary back module 300 in two views. For example, the back module 300 may be installed at a heel of the FASTS 110. For example, the back module 300 may be configured to releasably attach to the base module 205. In the example shown in FIG. 3A, the back module 300 includes the locking feature 250 configured to engage the mating feature 255 of the base module 205.

[0048] The back module 300 also includes the axle hook 260. For example, the axle hook 260 may be configured to engage an axle of the axle assembly 125 in the cavity 235. For example, the axle hook 260 may secure a position of the axle assembly 125 within the cavity 235.

[0049] In this example, the back module 300 includes second lock features 310. In some implementations, the second lock features 310 may be configured to engage with second mating features of the base module 205. For example, the second lock features 310 and the second mating feature may be configured to ensure a relative position of the back module 300 and the base module 205.

[0050] FIG. 3B shows a back perspective view of the back module 300. As shown, the back module 300 includes a first component 315 and a second component 320. For example, the first component 315 and the second component 320 may be combined to form the lock module 215 configured to engage the base module 205. In the embodiment shown in FIG. 3B, the locking feature 250 includes four protrusion features on a top surface of the back module. In other embodiments, the locking feature 250 may include other numbers (e.g., 2, 3, 5, 6) of protrusion features.

[0051] FIG. 3C shows a second embodiment of a first component (e.g., the first component 220). In this example, a first component 315 includes a smooth top surface 330. For example, the first component 315 may advantageously be easy to insert into the second component 320. As shown, the first component 315 includes a pair of hooks 335. For example, the hooks 335 may be configured to engage a locking feature of the first component 315. For example, the first component 315 may be releasably secured to the second component 320 when the hooks 335 engage the second component 320.

[0052] FIG. 4A, FIG. 4B, and FIG. 4C show exemplary installation procedures of an exemplary side loaded DHFST into a shoe. As shown in FIG. 4 A, a side loaded DHFST 400 includes a static module 405 and a side loading module 410. For example, the static module 405 may be fixedly coupled to a heel portion of a shoe 415 (e.g., the FASTS 110). As shown, a user may insert the side loading module 410 into a cavity (not shown) of the shoe 415 and the static module 405.

[0053] As shown in FIG. 4B, after the side loading module 410 is installed into the cavity of the shoe 415 and the static module 405, the user may install a wheel 420 into a slot 425 (FIG. 4 A) of the shoe 415. As shown in FIG. 4C, the side loading module 410 is removed partially from the cavity of the shoe 415 and the static module 405. In this example, the side loading module 410 includes an axle assembly 430. For example, the axle assembly 430 may be configured to rotatably coupled to shoelace of the shoe 415. For example, rotation of the axle assembly 430 in a first direction may tighten the shoelace. For example, rotation of the axle assembly 430 in a second direction opposite to the first direction may loosen the shoelace.

[0054] In some implementations, after the side loading module 410 and the wheel 420 are installed into the shoe 415, the wheel 420 may engage the axle assembly 430. For example, the user may rotate the wheel 420 advantageously from an external of the shoe 415 to tighten the shoelace of the shoe 415. For example, the side loaded DHFST 400 is disposed at the heel portion of the shoe 415. Accordingly, for example, the side loaded DHFST 400 may advantageously allow the user to rub the wheel 420 to tighten and loosen the shoelace handsfree.

[0055] In various implementations, the static module 405 may include a twist and lock feature at the second aperture. For example, the axle assembly 430 (e.g., an axle shaft of the axle assembly 430) may slide into the second aperture perpendicular to the longitudinal axis. For example, after sliding into the second aperture, a user may lock the axle assembly 430 the cavity by rotating in a about the longitudinal axis.

[0056] FIG. 5A, FIG. 5B, FIG. 5C, FIG. 5D, and FIG. 5E are schematic diagrams depicting various components of an exemplary side loaded DHFST (e.g., the side loaded DHFST 400 in FIGS. 4A-C). As shown in FIG. 5A, the wheel 420 may include one or more engagement features 505. For example, the one or more engagement features 505 may be configured to engage coupling features of the side loading module 410. For example, the one or more engagement features 505 may rotate the axle assembly 430 to adjust a tension of the shoelace (e.g., coupled to the axle assembly 430). In some implementations, the wheel 420 includes an elastic surface 510. For example, the elastic surface 510 may include materials (e.g., a rubber material, a coating) to facilitate frictional force when the wheel 420 is rotated against a substrate (e.g., a ground).

[0057] FIG. 5B shows an example of the axle assembly 430 of the side loaded DHFST 400 as described with reference to FIGS. 4A-C. As shown, the axle assembly 430 includes a first stringaperture 515A and a second string aperture 515B. For example, the shoelace of the shoe 415 may be tied to one or both of the first string aperture 515A and the second string aperture 515B. Coupling features 520 may be configured to engage the one or more engagement features 505 of the wheel 420. The coupling features 520 are securely attached to a roller 525 through the two washer wheels 545. For example, the coupling features 520 may rotate the apertures 515A, 515B when it is rotated about the z-axis of the wheel 420. For example, the roller 525 may be rotatably wrapped by the shoelace. For example, by rotating the apertures 515A, 515B, the shoelace may be tightened or loosened.

[0058] FIG. 5C shows an exemplary assembly diagram of the side loaded DHFST 400. As shown, the static module 405 includes an attachment module 535, the back module 300, and the axle hook 260. The side loading module 410 includes the axle assembly 430 coupled to two washer wheels 545. The side loading module 410 includes a cover 550. For example, to replace a two washer wheels 545, a user may first remove the cover 550.

[0059] In some implementations, the attachment module 535 may be fixedly coupled to a heel of the shoe 415. For example, the back module 300 may be releasably coupled to the attachment module 535. For example, when the back module 300 is coupled to the attachment module 535, the axle assembly 430 and the wheel 420 may be fixed in a position configured to adjust a tension of the shoelace of the shoe 415 by a rotation force applied at the wheel 420.

[0060] As shown, the slot 425 may define a first lumen configured to receive the wheel 420. The first lumen, for example, may intersect with a second lumen configured to receive the axle assembly 430. For example, the first lumen and the second lumen may intersect perpendicularly within the cavity. In various examples, when the axle assembly 430 is inserted into the second lumen after the wheel 420 is inserted into the first lumen, the wheel 420 may be locked by the axle assembly 430 (e.g., through an axle of the wheel 420).

[0061] As shown in FIG. 5D, the back module 300 may include a pair of apertures 555 configured to allow the axle hook 260 (e.g., of the first component 315 described with reference to FIGS. 3A- C) to pass through and engage the axle assembly 430. The second component 320 includes a wheel aperture 530. For example, the slot 425 may allow the wheel 420 to pass through and engage a surface (e.g., the surface 245) after assembly. For example, the back module 300 may advantageously be removable from the attachment module 535 for parts (e.g., the wheel 420, the axle assembly 430 replacement).

[0062] FIG. 5E shows an exemplary embodiment of the attachment module 535. For example, the attachment module 535 may be fixedly attached to the FASTS 110 at a back surface 560 of the attachment module 535. The attachment module 535 also includes a guiding features 565 in thisexample. For example, the guiding features 565 may be configured to alight the axle assembly 430 within the cavity defined by the back module 300 and the attachment module 535.

[0063] In various implementations, an automatic shoestring tightening device (e.g., the side loaded DHFST 400) may include an attachment base (e.g., the attachment module 535) at a heel of a shoe (e.g., the shoe 415). For example, the attachment base may include a first aperture (e.g., the slot 425) disposed at the bottom of the attachment base defining a first lumen configured to releasably couple to a wheel. For example, the attachment base may include a second aperture disposed at a side of the attachment base defining a second lumen configured to receive a shaft (e.g., the coupling features 520, the axle assembly 430). For example, the first lumen and the second lumen intersect. For example, when the shaft is inserted into the second lumen after the wheel is inserted into the first lumen, the wheel is locked by the shaft through an axle of the wheel.

[0064] FIG. 6A and FIG. 6B show exemplary installation procedures of an exemplary coupler installed DHFST into a shoe. As shown in FIG. 6A, a coupler-installed DHFST (CIDHFST 600) includes a roto module 605 and a static module 610. For example, the roto module 605 may be placed within the static module 610 along guiding features 625 of the static module 610. After the roto module 605 is installed, as shown in FIG. 6B, a cover module 620 is releasably coupled to cover the roto module 605, and the static module 610 at a bottom surface 630 of a shoe 635. In this example, the cover module 620 is releasably fixed to the bottom surface 630 using two screws 615. For example, the screws may be inserted perpendicular through a horizontal surface of a sole of the shoe.

[0065] As shown, the cover module 620 includes an aperture configured to allow a wheel 640 of the roto module 605 to be extended out of the bottom surface 630 of the shoe 635. For example, a user may rotate the wheel 640 to adjust a tension of a shoelace of the shoe.

[0066] FIG. 7 depicts various components of an exemplary coupler installed DHFST into a shoe. In this example, a shoe heel 700 may include receiving features 720. The roto module 705 includes two channels 715 that allows two screws, and each screw is configured to pass through one of the two channels 715 to connect with the features 720. For example, the screws may be inserted perpendicular through a horizontal surface of a sole of the shoe. As shown, after installation, the shoe heel 700 and the static module 610 may be releasably coupled. For example, the roto module 705 may be configured to allow a roto component to extend out of a bottom surface of the shoe.

[0067] In various implementations, a roto component (e.g., the roto module 605, the roto module 705) may include a rotatable wheel and a shoestring tightening mechanism configured to receive a shoestring of a shoe. For example, the roto module 705 may include the axle assembly 430. In some examples, the rotatable wheel and the shoestring may be enclosed within a cover (e.g., the cover module 620). For example, the cover module 620 may be releasably coupled to the shoeusing at least two coupling features. For example, the roto component may advantageously be unitarily replaceable.

[0068] FIG. 8A and FIG. 8B show exemplary installation procedures of an exemplary top loaded DHFST into a shoe. As shown in FIG. 8 A, a top loaded DHFST 800 includes an insole 805. In this example, the top loaded DHFST 800 includes a roto module 815 installable beneath the insole 805. As shown in this example, a user may remove the roto module 815 from an inner cavity 810 within a sole of the shoe after lifting the insole 805. In some examples, the shoelace 115 may be coupled to the inner cavity 810 under the insole 805 (e.g., in separate cavities).

[0069] As shown in FIG. 8B, by tightening the shoelace 115 manually, the insole 805 may be pulled into the inner cavity 810. For example, the inner cavity 810 may include an aperture to allow a wheel of the roto module 815 to contact a ground after being installed into the inner cavity 810.

[0070] In various implementations, an automatic shoestring tightening device (e.g., the top loaded DHFST 800) may include an attachment base. The attachment base may include a first lumen configured to expose a wheel at the bottom of the attachment base. The attachment base may include a top load cavity configured to receive a roto component (e.g., a shoelace coupled roto module 815) including the wheel. For example, when the roto component is inserted into the top load cavity, the wheel is exposed out of the attachment base through the first lumen.

[0071] FIG. 9 is an assembly diagram depicting various components of an exemplary bearing operated DHFST. As shown, a DHFST 900 may rotate the shoelace 115 by rotating a rotatable wheel 905. The rotatable wheel 905, for example, may actuate shoelace tightener 910 through bearings 915.

[0072] FIG. 10A and FIG. 10B are assembly diagrams depicting an exemplary bushing operated DHFST. In this example, a DHFST 1000 may include a single shaft 1005. For example, the rotatable wheel 905 may be (releasably) coupled to the single shaft 1005 as described with reference to FIGS. 5A-D. For example, the single shaft 1005 may be a solid shaft. For example, the DHFST 100 may include a bushing going over spool. In some examples, the single shaft 1005 may advantageously be modulately replaceable. For example, a user of the DHFST 1000 may not need to worry about the smaller components like the bearings 915.

[0073] Although various embodiments have been described with reference to the figures, other embodiments are possible.

[0074] In some embodiments, the DHFST 120 may be configured to detach from the FASTS 110 and attach to different types of shoes with shoelaces. For example, the DHFST 120 may include a clip or a magnet that allows it to be easily removed or attached to various shoes. The DHFST 120may also include an adjustment mechanism that adapts the size and shape of the DHFST 120 to fit different shoes.

[0075] The DHFST 120 may, for example, include a flexible wheel that conforms to the curve of the sneaker's heel. The DHFST 120 may also include a sensor that detects the tension of the shoelace and adjusts the tightness accordingly. By way of example and not limitation, the DHFST 120 may have a diameter of about 5 cm and a thickness of about 2 cm when attached to a sneaker.

[0076] The DHFST 120 may, for example, include a rigid wheel that provides stability and support for the boot's heel. The DHFST 120 may also include a locking mechanism that prevents the wheel from rotating when the user is walking or running. By way of example and not limitation, the DHFST 120 may have a diameter of about 6 cm and a thickness of about 3 cm when attached to a boot.

[0077] The DHFST 120 may, for example, include a sleek and discreet wheel that blends in with the color and design of the dress shoe. The DHFST 120 may also include a wireless controller that allows the user to tighten or loosen the shoelace remotely. By way of example and not limitation, the DHFST 120 may have a diameter of about 4 cm and a thickness of about 1 cm when attached to a dress shoe.

[0078] Although an exemplary system has been described with reference to the figures, other implementations may be deployed in other industrial, scientific, medical, commercial, and / or residential applications.

[0079] In various implementations, various components and variations of the components may be applied and implemented across embodiments described in all figures. For example, the ratchet wheel of the axle assembly 125 may be applied in the backload module 135 A, the side module 135B, the top loading unit 135D, and in the bushing mechanism 140. The axle assembly 125, in some implementations, may include the bearings 915. In some implementations, the axle assembly 125 may be a unitarily produced without the bearings 915. Other components and / or parts described with reference to any figures may be used in other figures as appropriate.

[0080] Temporary auxiliary energy inputs may be received, for example, from chargeable or single use batteries, which may enable use in portable or remote applications. Some embodiments may operate with other DC voltage sources, such as a batteries, for example. Alternating current (AC) inputs, which may be provided, for example from a 50 / 60 Hz power port, or from a portable electric generator, may be received via a rectifier and appropriate scaling. Provision for AC (e.g., sine wave, square wave, triangular wave) inputs may include a line frequency transformer to provide voltage step-up, voltage step-down, and / or isolation.

[0081] In an illustrative aspect, a hands-free shoestring tightening device may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of a shoe. Forexample, the base module may include an opening at the proximal end of the shoe. For example, the hands-free shoestring tightening device may include a roto component configured to releasably couple into the opening of the base module. For example, the roto component may include an axle assembly comprising a rotatable wheel. For example, the roto component may include an axle shaft coupled through a center of the rotatable wheel defining a rotational axis of the rotatable wheel, wherein the rotational axis is perpendicular to the longitudinal axis.

[0082] For example, the hands-free shoestring tightening device may include a lock module. For example, the lock module may include a first engagement member configured to releasably engage a coupling feature of the base module, and a second engagement member configured engage to the axle assembly around the rotational axis.

[0083] For example, in an assembled state, the roto component may be coupled to the base module. For example, the first engagement member may engage the base module. For example, the second engagement member may engage the axle assembly. For example, the roto component may be releasably locked within a cavity defined by the base module and the lock module.

[0084] For example, the roto component may be configured to slidably from the proximal end towards a distal end of the shoe. For example, the base module may include an engagement collar extended from a top side of the opening towards a bottom. For example, the engagement collar is configured to engage the first engagement member. For example, a forward force may be exerted at the first engagement member towards a distal end of the shoe.

[0085] For example, the lock module may include a first jaw and a second jaw. For example, the first jaw and the second jaw may be releasably coupled jointly to form a bipartite clamp in the assembled state. For example, the bipartite clamp may include a hook configured as the second engagement member to engage the axle assembly. For example, a backward force may be exerted at the second engagement member towards the proximal end of the shoe.

[0086] In an illustrative aspect, a shoestring tightening device may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of a shoe. For example, the base module may include a cavity configured to receive a shoelace of the shoe. For example, the base module may include a first aperture connected to the cavity and disposed at a bottom surface of the base module defining a first lumen. For example, the base module may include a second aperture connected to the cavity and may be disposed at a side of the base module defining a second lumen. For example, the first lumen may be configured to receive a rotatable wheel in an assembled state. For example, the second lumen may be configured to receive an axle shaft in the assembled state. For example, the first lumen and the second lumen may intersect perpendicularly within the cavity. For example, during assembly, the axle shaft may be inserted into the secondlumen after the rotatable wheel is inserted into the first lumen. For example, the rotatable wheel may be releasably coupled to the axle shaft through a hub of the rotatable wheel.

[0087] For example, the base module comprises a twist and lock feature at the second aperture, wherein the axle shaft is configured to slide into the second aperture perpendicular to the longitudinal axis, and, after sliding into the second aperture, the axle shaft is locked within the cavity by rotating in a second direction about the longitudinal axis.

[0088] In an illustrative aspect, a shoestring tightening device may include an attachment base disposed at a proximal end of a longitudinal axis of a shoe. For example, the shoestring tightening device may include a roto component disposed below the attachment base. For example, the roto component may include a rotatable wheel. For example, the roto component may include an axle assembly comprising an axle shaft coupled to a hub of the rotatable wheel. For example, the roto component may be configured to receive a shoelace of the shoe. For example, the rotatable wheel may be coupled to a unitary housing at a bottom surface and the proximal end of the shoe. For example, the axle assembly may be releasably coupled to the attachment base with a plurality of coupling features.

[0089] For example, the attachment base may be attached to the shoe using permanent adhesive. For example, the plurality of coupling features may include two screws. For example, the two screws may be inserted perpendicularly into two thread holes of the roto component through a horizontal surface of a sole of the shoe. For example, the two thread holes may be each connected to two channel of the attachment base.

[0090] In an illustrative aspect, a shoestring tightening device may include an axle assembly. For example, the axle assembly may include an axle shaft configured to receive a shoelace of a shoe. For example, the axle assembly may include a rotatable wheel connected to the axle shaft configured to actuate rotation of the axle shaft. For example, the shoestring tightening device may include a base module permanently attached at a heel at a proximal end along a longitudinal axis of the shoe. For example, the base module may include a top load cavity configured to receive configured to receive the axle assembly.

[0091] For example, the base module may include a bottom opening to the top load cavity configured to expose the rotatable wheel at a bottom surface of the base module after the axle assembly is received within the top load cavity.

[0092] For example, the axle shaft of any of the shoestring tightening device of any of [0081-91] may include a lumen configured to allow a shoelace of the shoe to pass through. For example, a length of the shoelace received along the axle shaft may be directly proportional to an angular displacement of the axle shaft in a first direction. For example, the shoelace may be tightened when the rotatable wheel is rotated in the first direction.

[0093] For example, the axle shaft of any of the shoestring tightening device of any of [0081-92] may include a ratchet wheel such that the rotatable wheel may be allowed to be rotated in the first direction.

[0094] For example, the axle shaft of any of the shoestring tightening device of any of [0081-93] may include bearings.

[0095] For example, the axle shaft of any of the shoestring tightening device of any of [0081-94] may include a unitary body. For example, the axle shaft may be modularly replaceable.

[0096] A number of implementations have been described. Nevertheless, it will be understood that various modifications may be made. For example, advantageous results may be achieved if the steps of the disclosed techniques were performed in a different sequence, or if components of the disclosed systems were combined in a different manner, or if the components were supplemented with other components. Accordingly, other implementations are contemplated within the scope of the following claims.

Claims

CLAIMSWhat is claimed is:

1. A hands-free shoestring tightening device comprising: a base module (205) permanently attached at a heel at a proximal end along a longitudinal axis of a shoe, wherein the base module comprises an opening at the proximal end of the shoe; an axle assembly (125) configured to releasably couple into the opening of the base module, wherein the axle assembly comprises: a rotatable wheel (150); and, an axle shaft (240) coupled through a center of the rotatable wheel defining a rotational axis of the rotatable wheel, wherein the rotational axis is perpendicular to the longitudinal axis; and, a lock module (215) comprises a first engagement member (220) configured to releasably engage a coupling feature of the base module, and a second engagement member (225) configured engage to the axle assembly around the rotational axis, wherein, in an assembled state, the axle assembly is coupled to the base module, the first engagement member engages the base module, and, the second engagement member engages the axle assembly, such that the axle assembly is releasably locked within a cavity defined by the base module and the lock module.

2. The hands-free shoestring tightening device of claim 1, wherein the axle assembly is configured to slidably from the proximal end towards a distal end of the shoe.

3. The hands-free shoestring tightening device of claim 1, wherein the base module comprises an engagement collar extended from a top side of the opening towards a bottom, wherein the engagement collar is configured to engage the first engagement member, such that a forward force is exerted at the first engagement member towards a distal end of the shoe.

4. The hands-free shoestring tightening device of claim 3, wherein the lock module comprises a first jaw and a second jaw, wherein the first jaw and the second jaw is releasably coupled jointly to form a bipartite clamp in the assembled state, wherein the bipartite clamp comprises a hook configured as the second engagement member to engage the axle assembly, such that a backward force is exerted at the second engagement member towards the proximal end of the shoe.

5. A shoestring tightening device comprising: a base module (405) permanently attached at a heel at a proximal end along a longitudinal axis of a shoe, wherein the base module comprises: a cavity configured to receive a shoelace of the shoe; a first aperture (515 A) connected to the cavity and disposed at a bottom surface of the base module defining a first lumen; and a second aperture (515B) connected to the cavity and disposed at a side of the base module defining a second lumen, wherein: the first lumen is configured to receive a rotatable wheel (150) in an assembled state; the second lumen is configured to receive an axle shaft (430) in the assembled state, and, the first lumen and the second lumen intersect perpendicularly within the cavity, wherein, during assembly, the axle shaft is inserted into the second lumen after the rotatable wheel is inserted into the first lumen, such that the rotatable wheel is releasably coupled to the axle shaft through a hub of the rotatable wheel.

6. The shoestring tightening device of claim 5, wherein the base module comprises a twist and lock feature at the second aperture, wherein the axle shaft is configured to slide into the second aperture perpendicular to the longitudinal axis, and, after sliding into the second aperture, the axle shaft is locked within the cavity by rotating in a second direction about the longitudinal axis.

7. A shoestring tightening device comprising: an attachment base (610) disposed at a proximal end of a longitudinal axis of a shoe; and, a roto component (605) disposed below the attachment base, wherein the roto component comprises: a rotatable wheel (150); and, an axle assembly (125) comprising an axle shaft coupled to a hub of the rotatable wheel, and configured to receive a shoelace of the shoe, wherein the rotatable wheel is coupled to a unitary housing at a bottom surface and the proximal end of the shoe, and the axle assembly is releasably coupled to the attachment base with a plurality of coupling features.

8. The shoestring tightening device of claim 7, wherein the attachment base is attached to the shoe using permanent adhesive.

9. The shoestring tightening device of claim 7, wherein the plurality of coupling features comprises two screws.

10. The shoestring tightening device of claim 9, wherein the two screws are inserted perpendicularly into two thread holes of the roto component through a horizontal surface of a sole of the shoe, wherein the two thread holes are each connected to two channel of the attachment base.

11. A shoestring tightening device comprising: an axle assembly (815) comprising an axle shaft configured to receive a shoelace of a shoe, and a rotatable wheel connected to the axle shaft configured to actuate rotation of the axle shaft; and, a base module (805) permanently attached at a heel at a proximal end along a longitudinal axis of the shoe, wherein the base module comprises: a top load cavity (810) configured to receive configured to receive the axle assembly; and, a bottom opening to the top load cavity configured to expose the rotatable wheel (150) at a bottom surface of the base module after the axle assembly is received within the top load cavity.

12. The shoestring tightening device of any of claim 1-11, wherein the axle shaft comprises a lumen configured to allow a shoelace of the shoe to pass through, wherein a length of the shoelace received along the axle shaft is directly proportional to an angular displacement of the axle shaft in a first direction, such that the shoelace is tightened when the rotatable wheel is rotated in the first direction.

13. The shoestring tightening device of claim 12, wherein the axle shaft comprises a ratchet wheel such that the rotatable wheel is only allowed to be rotated in the first direction.

14. The shoestring tightening device of any of claim 1-13, wherein the axle shaft comprises bearings.

15. The shoestring tightening device of any of claim 1-14, wherein the axle shaft comprises a unitary body, such that the axle shaft is modularly replaceable.

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