Abstract: An adjustable skate includes a boot, a liner, and an adjusting device. The boot includes a toe cap, a heel portion, and a sole. The liner is mounted in the boot and includes a bottom plate and a toe box. A chamber is defined between the toe box and the heel portion of the boot for receiving a foot of a wearer. The adjusting device is mounted below the sole and includes a screw rod and a screw rod jacket. The screw rod jacket includes a longitudinal screw hole threadedly engaged with a threaded portion of the screw rod. The screw rod jacket is fixed below the liner to move therewith. When the screw rod is turned, the screw rod jacket moves in a longitudinal direction of the screw rod and the liner moves in a lengthwise direction of the chamber.

Abstract: The item of footwear (10) is provided with a roller (50) to enable the item of footwear to roll over a surface when the rolling means is in a first active position. The item of footwear (10) has a slide yoke (34) for retracting the roller (50) to a second latent position, thereby disabling the roller and preventing the item of footwear from rolling over a surface (see FIG. 2).

Abstract: An improved hinge system for pivotally coupling a skate lower portion to a skate upper cuff. The multi-hinge design incorporates a four link chain mechanism that greatly increases the number of design options for a hinged boot. The pivot axis defined by the four link chain can be designed to shift through a path of travel that generally coincides with the path of travel of the anatomical pivot axis defined by the user's foot and leg. The upper cuff and boot lower portion account for two of the four links of the four link mechanism. The other two links are either rigid bars with pin connections on both the upper cuff and the lower portion, or roller links with a pin connection to the upper and a slot like sliding surface on the lower portion. A slider link can be substituted for the roller and a slide surface can be substituted for the slot.

Abstract: A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or slide in areas you could only walk. Heeling is a new activity that employs a unique method of rolling and requires a newly learned skill set of balance, positioning, and coordination.

Abstract: An external wheeled heeling apparatus for walking and running and transitioning to rolling on a surface is provided. The apparatus includes a sole having a forefoot, an arch and a heel portion provided with a first side of the heel portion and a second side of the heel portion. The forefoot operable to engage the surface for walking and running. The apparatus further includes a first wheel operably coupled to rotate adjacent the first side of the heel portion and a second wheel operably coupled to rotate adjacent the second side of the heel portion.

Abstract: A steerable wheeled sport conveyance is disclosed employing a unique diamond shaped footprint especially adapted for riding at relatively high speeds over various types of terrain. A first set of singular in-line steering wheels are rotatably mounted on the opposing ends of an elongated frame in a manner that also allows one or both of them to pivot on a vertical axis, and a second set of parallel wheels are mounted in an opposing manner across the longitudinal tilt axis of the conveyance. The opposing parallel wheels are attached to corresponding struts, which in turn are independently pivotably mounted near the longitudinal centerline of the frame, and are rotatable in a plane perpendicular to the rotationary plane of the two sets of wheels. Side to side tilting motions of the frame relative to the opposing struts creates vertical displacements between them, thus providing the steering forces that are conveyed and connected to the axles of one or both of the in-line steering wheels.

Abstract: There is disclosed an in-line skate with an adjustable length. The in-line skate includes a heel support, a toe support, a positioning element, a pushing element, and a switch. The heel support includes two parallel transverse grooves near a flank, a cavity near an opposite flank, a longitudinal groove between the transverse grooves and the cavity, and a slot therein. The toe support includes a slide put movably in the longitudinal groove and a series of pockets in the slide. The positioning element includes a button put movably in the cavity and two latches put movably in the transverse grooves of the heel support for entering a selective pair of the pockets of the toe support, thus keeping the toe support in selective one of several positions relative to the heel support. The pushing element is put movably in the cavity for pushing the button and hence the latches. The pushing element defines a tunnel.

Abstract: A roller skate having enhanced steerability and stability is disclosed. The skate includes a platform for supporting a skater's foot and front and rear wheel trucks secured to the underside of the platform. A pair of front wheels is rotatably mounted in transverse axial alignment on the front wheel truck and a pair of rear wheels is rotatably mounted in transverse axial alignment on said rear wheel truck. The pairs of front and rear wheels are also in parallel axial alignment with each other and mounted on their respective wheel trucks for resiliently controlled, tilting movement about downwardly inclined longitudinal axes. In addition, a fifth wheel is rotatably mounted on the front wheel truck between the pairs of front and rear wheels and in parallel axial alignment with the wheel pairs.

Abstract: The two skates steered by leaning sideways normally curve along circles of similar curvature. As the two circles are offset by the legs' distance they intersect. In order to avoid this disadvantage it is desirable that the outer leg's curved track has a larger radius than the inner leg's curved track. Using lean-controlled steered skates with tiltable wheels comprising a parallelogram closed fourbar linkage including two horizontal cross-guides the purpose is achieved by affixing the two cross-guides rotatably to extensions of the frame in such a way that the vertical projection of the rotation axis makes a solid angle with the vertical projection of the pivot axes of the closed fourbar linkage.

Abstract: An external wheeled heeling apparatus for walking and running and transitioning to rolling on a surface is provided. The apparatus includes a sole having a forefoot, an arch and a heel portion provided with a first side of the heel portion and a second side of the heel portion. The forefoot operable to engage the surface for walking and running. The apparatus further includes a first wheel operably coupled to rotate adjacent the first side of the heel portion and a second wheel operably coupled to rotate adjacent the second side of the heel portion.

Abstract: A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or slide in areas you could only walk. Heeling is a new activity that employs a unique method of rolling and requires a newly learned skill set of balance, positioning, and coordination.

Abstract: A wheeled skate includes a shoe cradle for receiving a user shoe, the shoe cradle having opposing first and second shoe cradle sides; a wheel mounting structure; a wheel mounting structure elevation mechanism interconnecting the shoe cradle and the wheel mounting structure including for selectively elevating and lowering the shoe cradle relative to the wheel mounting structure; and an annular wheel rotatably mounted around the wheel mounting structure.

Abstract: An adjustable frame assembly for skates to allow for attachment of the frame in a number of positions along the length of the boot portion of the skate. The assembly comprises a skate foot bed containing two recessed portions each containing an opening flanked by ribs corresponding to ribs on a T-nut allowing the T-nut to rest in a variety of positions in the recessed portion. The T-nut further comprises a threaded opening for coupling to a fastener which attaches the frame to the base of the boot portion of the skate.

Abstract: A steerable roller skate includes: a sole member of a skate boot or fastening strap of roller skate having a pair of rear wheels transversely rotatably secured to a rear bottom portion of the sole member, a steering base steerably secured on a front bottom portion of the sole member, a pair of front wheels transversely rotatably secured on the steering base, a first circular magnet secured on a central bottom portion of the sole member, and a second circular magnet secured on the steering base adjacent to the first circular magnet having opposite magnetic polarities of the first and second circular magnets for normally attracting the second magnet to the first magnet with a greater magnetic attractive force between the first and second magnets for efficiently magnetically restoring the steering base and the front wheels for automatically resetting a straightforward orientation of the roller skate.

Abstract: The retractable foot gear 10 includes a sole 12 and a retractable wheel, ball, blade, or similar low friction element 16 which normally projects from a recess formed into the shoe's sole 12. The low friction element 16 retracts into a recess 14 when a predetermined amount of force is exerted on the low friction element 16. The low friction element 16 is additionally biased so as to automatically return to an extended position when the predetermined force is relieved. The retractable foot gear 10 assists persons with difficulty in walking, standing, or maneuvering. Moreover, the protruding low friction element enables one to slide one foot along a walking surface while minimizing the tendency of one to slip and fall.

Abstract: A wheeled skate apparatus with a steerable front wheel connected by a steering linkage having two lever arm linkages which produce an instantaneous steering axis inclined with respect to the vertical to produce a caster effect and provide an angulation of the steerable front wheel with respect to the forward direction of travel to provide a change in the direction of travel of the skate apparatus.

Abstract: An adjustable skate includes a boot and a liner. The boot includes an upper and a sole, the upper including a toe cap and a heel portion. The liner is mounted in the boot and includes a bottom plate slidably mounted on the sole and a toe box provided on a front end of the bottom plate. A chamber for receiving a foot of a wearer is defined between the toe box of the liner and the heel portion of the boot. A member is formed on the toe box of the liner. An adjusting member is mounted to the toe cap of the boot and engaged with the member on the toe box of the liner. The adjusting member and the member are so configured that rotation of the adjusting member causes the liner to move along a lengthwise direction of the boot.

Abstract: A wheel assembly for a shoe. A housing is attached to a heel portion of the shoe and defined with an opening. A wheel section is mounted to the housing in a manner such that a pair of wheels of the wheel section can be moved between an operating position in which they are received in the opening of the housing to be partially exposed out of a lower surface of the housing and a non-operating position in which they are taken out of the opening of the housing to be seated on a rear end portion of the shoe. The wheel section includes the pair of wheels, a shaft for supporting the pair of wheels, and a support bracket having one end which is connected to the shaft and the other end which is connected to the shoe by a hinge pin.

Abstract: A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or slide in areas you could only walk. Heeling is a new activity that employs a unique method of rolling and requires a newly learned skill set of balance, positioning, and coordination.

Abstract: A shoe is provided which is convertible between a walking shoe and roller skate comprising a shoe upper connected to an outsole formed with an internal bore at both the heel area and arch area, each of which receive a hollow sleeve carrying a rod whose opposite ends protrude from the sides of the outsole. A first end of each rod mounts a wheel which is retained thereon by a fixed end cap, and the opposite, second end of each rod has opposed, radially outwardly extending locking pins which are received within bores formed in a locking cap operative to retain a second wheel on the second end of each rod.

Abstract: A roller skate (10) has a light (22) housed in a forward tip recess of a slab (13) of synthetic material interposed between a boot (11) and the roller truck (12). A lighted toggling push-button switch (10) that espouses the back contour of the heel, can be activated by taping the back of the heel against the floor or any other stationary structure. The light comprises a battery compartment occupying the deepest area of the recess. A lens contoured to blend with the outline of the sole tip can be releasably snapped against the frontal opening of the battery compartment. A bulb-mounting assembly is held sandwiched between the lens and the battery compartment. The lights in the contoured tip lens and heel switch can be seen from either side of the skate.

Abstract: Shoes with various configurations of rollers secured to one region of their soles for rolling, while leaving another sole region exposed for walking. The rollers are mounted to rotate about an axle defining a primary axis of rotation extending at an angle of between about zero and 45 degrees to the walking direction, as viewed from above the shoe, for rolling sideways along a support surface. This provides a combined running-rolling method of locomotion, by running on the exposed sole surfaces, and then jumping into a “surfing” stance for rolling. In some cases, the rollers are mounted on steerable truck assemblies. One particularly small truck assembly includes wedge-shaped bushings for steering compliance.

Abstract: A skate apparatus for use in simulating movements made during Alpine and Nordic skiing. The skate apparatus comprises of a pair of skate members each having an elongate carriage member defining an upper platform surface and preferably having ski bindings affixed thereto. The carriage member supports a plurality of wheels, preferably arranged in pairs disposed along a central axis, that are rigidly maintained in a generally parallel configuration relative the upper platform surface. When worn and utilized by an individual, skate apparatus of the present invention closely mimics the balance and feel as would be encountered during conventional skiing maneuvers, especially with respect to turning motions made while skiing.

Abstract: A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or slide in areas you could only walk. Heeling is a new activity that employs a unique method of rolling and requires a newly learned skill set of balance, positioning, and coordination.

Abstract: An adjustable skate includes a boot, a liner, and a bladder. The boot includes an upper and a sole, the upper having a toe cap and a heel portion. The liner is mounted in the boot and includes a bottom plate slidably mounted on the sole and a toe box on a front end of the bottom plate. A chamber for receiving a foot of a wearer's foot is defined between the toe box of the liner and the heel portion of the boot. The bladder is mounted between the toe box of the liner and the toe cap of the boot. The bladder has a volume that is adjustable through inflation of air into the bladder or discharge of air out of the bladder, thereby moving the liner along a lengthwise direction of the boot.

Abstract: A steerable roller skate includes: a sole member of a skate boot or fastening strap of roller skate having a pair of rear wheels transversely rotatably secured to a rear bottom portion of the sole member, a steering base steerably secured on a front bottom portion of the sole member, a pair of front wheels transversely rotatably secured on the steering base, a first circular magnet secured on a central bottom portion of the sole member, and a second circular magnet secured on the steering base adjacent to the first circular magnet having opposite magnetic polarities of the first and second circular magnets for normally attracting the second magnet to the first magnet with a greater magnetic attractive force between the first and second magnets for efficiently magnetically restoring the steering base and the front wheels for automatically resetting a straightforward orientation of the roller skate.

Abstract: A heeling apparatus includes a shoe with a unique feature in the heel that allows one to walk, run, or roll seamlessly. The appearance is that of normal footwear because of the covert wheel assembly. The stealth wheel in the heel gives one the ability to roll or slide in areas you could only walk. Heeling is a new activity that employs a unique method of rolling and requires a newly learned skill set of balance, positioning, and coordination.

Abstract: A rolling kneepad caster device. The rolling kneepad caster device has a multiple-wheeled support assembly with swivel casters to provide structure to the rolling kneepad caster device to support a user, a kneepad cushion provided above the multiple wheeled support assembly to comfortably receive a user's knee, a substantially elongated shin guard adjacently attached to the multiple wheeled support assembly, the substantially elongated shin guard having cushioning provided to comfortably receive a user's shin and upper foot and a plurality of strap fasteners to secure the user's knees and shins to the rolling kneepad caster device.

Abstract: A brake assembly for applying a braking force to one or more wheels of a wheel supported device, such as an inline skate. The brake assembly has a rotating brake member held by one or more wheels, which is preferably a disk shaped brake, partially embedded on one or both sides of a wheel. A fixed brake member is held so that it does not turn with respect to the wheel frame. The fixed brake member has a friction surface positioned adjacent the braking surface of the rotating member. The fixed brake member can be bent so that its friction surface contacts the rotating brake member to apply a braking force to the rotation of the wheel. Preferably, the fixed brake member is bent by a cam surface and the cam surface is contacted by a movable brake arm held by the frame.

Abstract: A roller skate includes a boot, a connection frame fastened to the outsole of the boot, an expandable frame fitted with the connection frame, a wheel frame fastened to the connection frame and provided with a plurality of wheels and a brake shoe, and an elastic member located in the connection frame by the expandable frame. The elastic member serves as a shock absorber of the roller skate.

Abstract: A retracting roller module for skating shoes is disclosed, and the retracting roller module comprises a base seat, a positioning shaft, a front roller module and a rear roller module pivotally mounted onto the shaft, and a control mechanism for controlling the retracting and extending of the front and rear roller module, characterized in that the front section of the lateral plate of the base seat is mounted with the positioning shaft which mounts a rear roller support frame, rubber rim, a side linear, a middle linear, and a front roller support frame, and the rear roller support frame and the front roller support frame are pivotally mounted onto a shaft hole of the lateral side plate, and the middle section of the lateral side plate is provided with guiding channel having a rear positioning hole and a front positioning hole, the guiding channel utilizes the driving rod of the control mechanism to mount a mechanical seal, a front interlink rod, an engaging block, a rear interlink rod, a control rod and an ext

Abstract: The retractable foot gear 10 includes a sole 12 and a retractable wheel, ball, blade, or similar low friction element 16 which normally projects from a recess formed into the shoe's sole 12. The low friction element 16 retracts into a recess 14 when a predetermined amount of force is exerted on the low friction element 16. The low friction element 16 is additionally biased so as to automatically return to an extended position when the predetermined force is relieved. The retractable foot gear 10 assists persons with difficulty in walking, standing, or maneuvering. Moreover, the protruding low friction element enables one to slide one foot along a walking surface while minimizing the tendency of one to slip and fall.

Abstract: A dual-purpose sports footwear is formed of a boot, an elastic plate, an arcuate outer plate, and a wheel mount plate. The boot has an arcuate inner plate which is detachably fastened to the elastic plate. The arcuate outer plate is detachably fastened to the elastic plate. The boot, the elastic plate and the arcuate outer plate form a jumpshoe. The wheel mount plate is provided with a plurality of wheel sets and is detachably fastened to the arcuate inner plate of the boot to form a roller skate.

Abstract: A detachable skate having two sets of engagement members containing two female members and two male members which are correspondingly fitted to a sole at the bottom of the shoe and a mounting plate at the top of the skating device. The female members and the male members can be connected with each other by means of the engagement of a projecting pin into the bottom end of the vertical part of the L-shaped guide slot. Moreover, one male member is provided with a lever for turning this male member. Accordingly, the shoes are detachable from the skating devices so that it's convenient to assemble, stable and safe to use.

Abstract: A roller skate vehicle which includes a standard roller skate frame having two pairs of axle mounted wheels and a padded seat mounted thereon.

Abstract: A skateboard for use on a hard surface, configured to simulate the response of a snowboard, has a support platform to which sets of wheels are mounted. The wheels have successively decreasing diameters mounted on a common axle. The wheels of successively decreasing diameter may additionally or alternately be formed of materials of successively greater frictional and compressibility characteristics.

Abstract: The sports shoe mainly comprises a pivot, a blocking plate and a latch. The pivot is adapted to pivotally connect the sports shoes to a detachable ice/roller skate and the latch is adapted to securely lock therebetween. The blocking plate is arranged in spaced relationship with the pivot and a space provided therebetween is adapted to receive a pivotal hook seat of the pivot. The latch includes an elastic member and a plurality of guiding studs which are used to increase the sports shoe in assembled reliability for operating the detachable ice/roller skate.

Abstract: At least one walking member that may be used in conjunction with an in-line skate to enable the wearer of the in-line skate to walk while wearing the in-line skate.

Abstract: A miniature skateboard includes a platform preferably of a size less than that of a user's shoe. Axles are attached to the undersurface of the platform at longitudinally spaced positions. Wheels are attached to the axles at laterally spaced positions. A support member coupled to a pivot pin on the platform near the platform rear end is manually pivotable between first and second positions. In the first position, the support member is disposed under the platform. In the second position, the support member extends rearwardly from the platform to support the user's other foot. A clip on the platform retains the skateboard on the user's belt when the skateboard is not being used. Straps laterally disposed on the platform near the platform front end convert the skateboard to a skate when the straps are tightly coupled and the clip is pivoted to a position displaced from the platform.

Abstract: A sole plate structure of a roller skate, wherein, a sole plate is integrally formed by injection molding of plastic into a flat and elongate shape, and is provided on both the front and the rear ends thereof with two down protruding blocks; and every such two protruding blocks are placed therebetween a vibration absorbing member, two wheel axle covers are provided for the pairs of the front and the rear wheels on the roller skate to have their respective vibration absorbing members and protruding blocks enveloped, and locked with a bolt extending therethrough, the vibration absorbing members can completely absorb the vibrations induced in skating of the roller skate.

Abstract: As described above, the roller shoes of the present invention have the following structures and functions: the two roller-grooves are at the front and back side of the undersurface of the base of the shoe; the rollers are affixed to the roller-grooves; the roller-shafts of the roller and the roller-shaft supporting grooves are linked by magnetic force so that the roller-shafts of the roller do not separate from the roller-shaft supporting grooves. Because these two rollers are fixed at the front and back side of the base of the shoe, the user can use them like roller skates. And, if he wants use them like usual shoes after using them as roller skates, he can shift their usage from the roller-shoes to common shoes by easily separating the rollers from the roller-grooves.

Abstract: The present invention relates to a multifunctional shoe which includes a shoe, a locating part, a sliding device and a locking device. The shoe has a sole provided with at least an accommodation. The locating part is fixed by a fixing member inside the accommodation and is a hollow body with the opening thereof is directed downward, thereby forming a mounting opening at the bottom of the sole. The sliding device contains a wheel and a wheel base. The wheel base corresponds to the locating part in form so that it can be received in the locating part. The locking device is located at the side of the locating part. A lock pin is disposed inside the locking device and is controllable from the outside of the sole to be axially moved. The sliding device is fixed inside the locking device while the small part of the wheel projects from the sole for sliding purpose; moreover, the sliding device can be stored or disassembled without projection on the sole for walking purpose.

Abstract: A shoe and a wheel device include one end detachably secured together with a projection-and-lock notch engagement. A toe member and a heel member are engaged on the front and the rear portions of the shoe. The wheel device includes one or more projections extended from the front portion for detachably securing to the toe member without additional fasteners or tools. One or more latches are attached to the rear portion of the wheel device for latching and securing the heel member and the rear portion of the shoe to the wheel device without additional fasteners or tools.

Abstract: A self-generating light-producing skateboard mainly includes at least one induction coil assembly mounted on at least one wheel supporter assembly, at least one magnet-containing wheel mounted on the wheel supporter assembly at an outer side of the induction coil assembly, at least one light-emitting element fixed to an outer periphery of a deck of the skateboard and electrically connected to the induction coil assembly, and a light-transferring strip mounted around the outer periphery of the deck. When wheels of the skateboard rotate at high speed, the magnets on the magnet-containing wheel interact with the induction coil assembly to produce current that drives the light-emitting element to emit light. The light-transferring strip transfers the light emitted from the light-emitting element to lighten the outer periphery of the deck, making the skateboard safer for use.

Abstract: Shoes with various configurations of rollers secured to one region of their soles for rolling, while leaving another sole region exposed for walking. The rollers are mounted to rotate about an axle defining a primary axis of rotation extending at an angle of between about zero and 45 degrees to the walking direction, as viewed from above the shoe, for rolling sideways along a support surface. This provides a combined running-rolling method of locomotion, by running on the exposed sole surfaces, and then jumping into a “surfing” stance for rolling. In some cases, the rollers are mounted on steerable truck assemblies. One particularly small truck assembly includes wedge-shaped bushings for steering compliance.

Abstract: A gliding device comprising a gliding member (200) and a sports shoe (5) associated to the gliding member. The sports shoe comprises an upper (8) and protection means for protecting the foot and the lower portion of the user's leg against impacts and other accidental events. Such protection means comprises one or more protection elements (12), which are associated at least to the upper.

Abstract: A skate (10) includes a base plate (11) pivotally carrying a platform plate (14) which can be the sole of a shoe (16). There is an aperture (18) in the base plate (11) so that when the platform plate (14) is adjacent to the base plate (11), a pad (17) on the platform plate (14) extends through the aperture (18) so that the user may walk on the skate (10). A frame (23) carries a drive shaft (20) which carries drive wheels (19). The drive shaft (20) is journalled in unidirectional bearings (21) and has a gear (32) which engages a threaded motor shaft (31) of a motor (27). A collar (38) has threads (37) which engage the threads (36) of a motor housing (33). When the motor (27) rotates in the one direction permitted by the unidirectional bearings (21), the drive wheels (19) will power the skate (10).

Abstract: A multi-wheel heeling apparatus is provided. The multi-wheel heeling apparatus has a sole with a first opening formed in a heel portion of the sole and a second opening in the sole formed adjacent the first opening. The multi-wheel heeling apparatus includes a first and a second wheel assemblies. The first wheel assembly includes a first wheel mounted on a first axle, and a first mounting structure operable to support the first axle so that a portion of the first wheel resides in the first opening. The second wheel assembly includes a second wheel mounted on a second axle, and a second mounting structure operable to support the second axle so that a portion of the second wheel resides in the second opening.

Abstract: A wheel mount for a skateboard includes a base plate, a suspension body, a shock absorbing device and an axle. The skateboard has a platform with a top and bottom, and the base plate is adapted to be mounted on the bottom of the platform. The suspension body is mounted on the base plate, and the shock absorbing device is mounted between the base plate and the suspension body. A through hole is laterally defined in and extends through the suspension body. The axle extends through the through hole and is partially received in the suspension body. The axle includes two opposite ends, A wheel is rotatably mounted on each end of the axle. The axle is hollow to promote the strength of the axle.

Abstract: The present invention relates to a detachable skate having two sets of engagement members containing two female members and two male members which are correspondingly fitted to a sole at the bottom of the shoe and a mounting plate at the top of the skating device. The female members and the male members can be connected with each other by means of the engagement of a projecting pin into the bottom end of the vertical part of the L-shaped guide slot. Moreover, one male member is provided with a lever for turning this male member. Accordingly, the shoes are detachable from the skating devices so that it's convenient to assemble, stable and safe to use.