"low-gravity" foldable mini-skateboard with automatic braking, the running axles of which are housed in elastomer dampers

Abstract

The present invention relates to an axle 50 for a skateboard, the axle 50 comprising a damper 4 comprising a first material, the damper being intended to be in contact with a deck of a skateboard, an axle support 2 intended to receive a wheel at each of the ends thereof, a retaining cage 10 arranged on the damper 4 and comprising a second material, the retaining cage comprising guiding means configured to guide a movement of the axle support 2 when the axle support 2 compresses the damper 4, and at least one clamping element 8 configured to connect the damper 4 and the axle support 2 and to keep the axle support 2 bearing on the damper 4. The present invention also relates to a wheeled device of the foldable skateboard type with a braking system.

Description

[0001] P4253PC00 Specs (AOFF)

[0002] LOW GRAVITY FOLDABLE MINI-SKATEBOARD WITH AUTOMATIC BRAKING AND RIDING AXLES HOUSED IN ELASTOMER SHOCK ABSORBERS

[0003] TECHNICAL FIELD

[0004] The present invention relates to the field of rolling devices of the skateboard type and the components of these devices.

[0005] The invention relates more particularly to an axle for a skateboard-type rolling device and to a rolling device comprising at least one axle according to the invention.

[0006] STATE OF THE ART

[0007] Riding and using a wheeled device, such as a skateboard, can be complicated and risky depending on various parameters, and even more so for a beginner.

[0008] The height corresponding to the vertical position of the center of gravity—that is, the distance between the ground and the top of the deck of a wheeled device such as a skateboard or any type of classic skateboard—is on average 100 mm from the ground, making it rather difficult for the average user to maintain balance. By lowering this center of gravity and / or reducing the height between the deck and the ground, the wheeled device can be used more intuitively and safely.

[0009] One way to lower the center of gravity or platform height of a rolling device is by reducing the size of the axles attached to the rolling device.

[0010] A standard rolling device axle, such as a skateboard (also known as a "truck"), is an essential component that allows the board to rotate and maintain its stability. The axle is composed of several key elements, including the axle support, the clamping arm, the shock absorbers, and the base plate.

[0011] The axle support, usually in the shape of an inverted T when the rolling device is on the ground, supports the wheels and bearings. It is mounted on the base plate, which can be attached to the platform. The clamping bracket, generally a central bolt, passes through the axle support and the bushings, which are usually made of polyurethane. These bushings allow some flexibility and permit rotation of the axle support. P4253PC00 Specs (AOFF)

[0012] To turn, the user applies pressure to one side of the board, which tilts the axle support and compresses the pads on one side while releasing the other. This action causes the axle support to rotate around the mounting disc, allowing the rolling device to turn. Adjusting the tension of the axle clamp can alter the turning responsiveness, making the axles tighter for precise control of wide turns or looser for tighter, smoother turns.

[0013] Furthermore, riding a skateboard by pushing off with your feet requires a perpendicular body position relative to the direction, which demands a high level of control over movement transitions for the average user.

[0014] A skateboard does not have an automatic brake during a run, a fall or the ejection of its user and therefore it continues on its way freely which makes it extremely dangerous for other users.

[0015] Finally, a skateboard is relatively heavy and bulky due to its weight and dimensions, which discourages many users from making it their daily means of transport, even for short distances.

[0016] Therefore, there is a need for a rolling device, for example a skateboard, which is easier and more intuitive for a user to use.

[0017] SUMMARY OF THE INVENTION

[0018] The present invention makes it possible to remedy the disadvantages of the prior art and relates to an axle for a rolling device of the type skateboard, longboard, folding skateboard, etc.

[0019] In particular, one objective of the present invention is to reassure the user of a skateboard-type rolling device. This can be achieved, for example, by lowering the center of gravity compared to a conventional skateboard.

[0020] Another proposed solution is to make the rolling device, for example, steerable from the front.

[0021] Finally, a rolling device according to the invention may include an automatic braking system and a hinge, allowing it to be folded in half for storage. P4253PC00 Specs (AOFF)

[0022] According to one aspect of the invention, an axle for a rolling device of the skateboard type, described in claim 1, is proposed.

[0023] The construction and arrangement of such an axle is carried out in order to limit its thickness and thereby reduce the distance between the platform of the rolling device and the ground, thus lowering the center of gravity of the rolling device and facilitating its use.

[0024] The axis according to the invention comprises:

[0025] - a shock absorber comprising a first material, the shock absorber being intended to be in contact with a deck of a skateboard;

[0026] - an axle support designed to receive a wheel at each of its ends;

[0027] -a retaining cage comprising a second material, the retaining cage comprising guiding means configured to guide a displacement of the axle support when the axle support compresses the damper; and

[0028] - at least one clamping element configured to connect the shock absorber and the axle support together and to hold the axle support against the shock absorber.

[0029] The axle according to the present invention makes it possible to lower the height of the center of gravity of a skateboard (height of the deck surface to the ground) for the user, for example, to less than 60 mm from the ground with wheels of a diameter of 55 mm. This height, reduced by a third compared to a classic skateboard, is very comfortable and reassuring for the user.

[0030] The present invention also relates to a rolling device according to claim 15, comprising at least one of the axes according to the invention.

[0031] According to one variant of the invention, the rolling device also includes

[0032] - a front platform and a rear platform;

[0033] - a hinge configured to connect the two platforms.

[0034] The rolling device according to this aspect of the invention is therefore foldable in half thanks to this hinge in the center of the device and its dimensions are close to the A4 format, which makes it very compact for transport or storage.

[0035] The rolling device may, in one aspect of the invention, further comprise a braking mechanism at the rear of the rear platform, the braking mechanism being designed to contact the ground by tilting the rear platform under pressure and / or gravity in the absence of the device's user. P4253PC00 Specs (AOFF)

[0036] Unlike other skateboards, the rolling device according to this aspect of the invention stops automatically in the absence of the user, which makes it very safe to use.

[0037] Other advantageous features of the invention are indicated in the dependent claims.

[0038] BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features and advantages of the present invention will become more apparent upon reading the detailed description and illustrated by the accompanying drawings, in which:

[0040] Figure 1 shows the set of parts in exploded view form which make up variants of the invention and its devices.

[0041] Figure 2 represents the exploded view of the device which relates exclusively to the axes of the rolling part of a skateboard-type rolling device.

[0042] Figures 3, 4, 5 illustrate the axis in some important details for understanding and also assembled.

[0043] Figures 6, 7, 8 illustrate design details of the hinge device with its slides, axles, connecting dampers and central connecting piece.

[0044] Figure 9 represents the ergonomic part and the complete assembly of a rolling device including the axles according to a variant of the invention.

[0045] Figures 10, 11, 12, 13 illustrate other viewpoints and modes of use such as length adjustments, driving and braking.

[0046] Figure 14 represents the folded and compact view of a skateboard-type rolling device in perspective.

[0047] Figures 15 and 16 represent the assembled object horizontally in plan / elevation / profile / perspective (4 views).

[0048] Figure 17 summarizes the various aspects of the rolling device. P4253PC00 Specs (AOFF)

[0049] DETAILED DESCRIPTION

[0050] The attached drawings illustrate the invention.

[0051] The nomenclature and reference symbols for the features of the invention are as follows, with common English terms in parentheses for better understanding:

[0052] (1) Deck

[0053] (50) Driving axis or axis (Truck),

[0054] (60) Mini-skate or rolling device,

[0055] (2) Axle support (Hanger)

[0056] (3) pivot element or sphere (Pivot Bail),

[0057] (4) TPU shock absorber or damper (Main Bushing),

[0058] (5) High Pivot cup,

[0059] (6) Shock absorber flex side bar (Riser Pad),

[0060] (7) Opening or Passage Gallows (KingPin box),

[0061] (8) clamping element or clamping bracket (KingPin),

[0062] (9) fastening element or rotating disc (hanger disc)

[0063] (10) Restraint cage or arch (Flat base)

[0064] (1 1) Housing or low pivot cup,

[0065] (12) End or axle,

[0066] (13) Fastening means or screws / washers / nuts (Screws / rings / nuts),

[0067] (14) TPU shock absorber or cone (Cone bushing),

[0068] (15) Top washer,

[0069] (16) clamping nut (Kingpin nut),

[0070] (17) Wheel,

[0071] (18) Mudguard,

[0072] (19) Fixing means or keying device or square geometry (Square profile),

[0073] (20) Axle nut,

[0074] (21) Hinge,

[0075] (22) Slide,

[0076] (23) Hinge-Link,

[0077] (24) TPU Link Bump,

[0078] (25) Hinge-Axle,

[0079] (26) braking mechanism or braking system or brake,

[0080] (27) Adjustable Foot-strap, P4253PC00 Specs (AOFF)

[0081] (28) Foot-strap screw,

[0082] (29) Hinge-Locker.

[0083] Axis 50 according to a variant of the invention is represented, for example, in Fig. 2.

[0084] As illustrated in Fig. 2, the shaft 50 includes a damper 4 comprising a first material, a shaft support 2, a retaining cage 10 comprising a second material, and at least one clamping element 8.

[0085] The shock absorber 4 can be or act as a base plate and constitute a part that is in contact with the platform of a rolling device, like a base plate of a traditional axle.

[0086] The shock absorber 4, intended to be in contact, for example in direct contact, with a platform of a rolling device such as a skateboard, comprises a first material.

[0087] Preferably, the first material of the shock absorber 4 is more elastic, or less rigid, or more flexible, than the second material contained by the retaining cage 10.

[0088] The first material of the shock absorber can be, for example, a damping material.

[0089] The first material includes, for example, an elastomeric material, for example a material from the family of plastics or thermoplastic elastomers, such as thermoplastic polyurethane or thermoplastic copolyamide.

[0090] The first material may also, or alternatively, include other cushioning materials such as rubber, silicone, cork, foam, and / or neoprene.

[0091] Preferably, the first material has a lower modulus of elasticity, e.g., a Young's modulus, than the modulus of elasticity of the second material.

[0092] The shock absorber helps to dampen or protect against shocks and vibrations caused by the unevenness of the ground.

[0093] As illustrated in Fig. 2 and Fig. 4, the damper 4 may include at least one surface 63 configured to contact the axle support 2 so that the latter rests on the damper 4. P4253PC00 Specs (AOFF)

[0094] The shock absorber 4 may include an opening 7 configured to receive at least one clamping element 8.

[0095] The opening 7 can be aligned with an opening arranged on an axle support 2 as well as with an opening arranged on the retaining cage 10 allowing at least one clamping element to pass through the openings of all the parts and thus to fix together the shock absorber 4, the axle support 2, and the retaining cage 10.

[0096] According to a variant of the invention illustrated in Fig. 2 and compatible with the previous ones, the shock absorber 4 may include one or more openings 42 configured to receive fastening means 13, 132 which advantageously reinforce the assembly of the elements of the axle 50 and which can be used to fix the shock absorber 4 or the axle 50 to a platform of a skateboard or rolling device, for example the platform 1 illustrated in Fig. 1.

[0097] One or more openings 42 can be aligned with openings arranged on a rolling device platform as well as with openings arranged on the retaining cage 10 thus allowing the axle to be fixed to a rolling device platform and the shock absorber 4 and the retaining cage 10 to be fixed together.

[0098] The fastening means may include screws, bolts or any other means of attaching the axle to a rolling device platform.

[0099] According to a variant of the invention illustrated in Figs. 2 and 4, the shock absorber 4 may include one or more lateral bending bars 6 extending from the shock absorber 4 and terminated by the bearing surfaces 63 which reinforce the reception and support of the axle support 2.These lateral bending bars 6 can also allow the quantity or thickness of the first material between the axle support 2 in contact with the surface 63 and the end of the shock absorber 4 intended to be in contact with the rolling device to be increased, and thus improve the damping properties of the axle 50, modify the distance between the axle support 2 and the platform of a rolling device and also improve the crushing properties of the shock absorber 4 via the extension 6 in order to allow, by pressure, a part of the extension or the shock absorber to be crushed and thereby impart a rotation of the axle support 2 thus allowing the rolling device to rotate in the manner of a traditional skateboard axle.

[0100] The axle 50 further includes an axle support 2 for receiving a wheel at each of its ends 12. Fig. 2 shows the axle support 2 according to a variant of the invention. P4253PC00 Specs (AOFF)

[0101] The support for axis 2 preferably has a predominantly cylindrical shape; however, deviations from a perfect cylinder are possible. The support for axis 2 can be in the form of an elongated tube, for example, with a variable cross-section.

[0102] The surface or surfaces 63 of the damper can be in a form compatible with the form of the axis support 2, for example, forming the outer surface of a half-cylinder or a sector of a cylinder with a radius comparable to the radius of the axis support 2, shown in Fig. 2. Thus, the surface of the axis support in contact with the damper can be increased.

[0103] Many materials are possible for the manufacture of the axis 2 support, such as one or more of the following materials: stainless steel, steel, aluminum, titanium, or fiberglass or carbon fiber composites.

[0104] The axis support 2 may include a pivot element 3, optionally formed integrally with the axis support 2, and extending beyond the surface of the wall of the axis support 2, around which the axis support 2 pivots.

[0105] The pivot element 3 can advantageously allow very tight turns, for example with a radius of approximately 60 cm, by using the user's weight and support on the skateboard deck. The pivot element 3 can also prevent lateral movement of the axle support by holding it in its housing and centered on the axle 50.

[0106] The pivot element 3 increases the surface area of ​​the axle support 2 which comes into contact with and fits into the shock absorber 4 and the retaining cage 10.

[0107] The pivot element 3 can be located between the two ends of the axis support 2 and preferably at the center of the axis support 2. According to a variant of the invention illustrated in Figs. 2 and 3, the pivot element 3 can be spherical, spheroidal, hemisphere-shaped, quarter-sphere-shaped, or cylindrical. The shape of the pivot element 3 can be perfectly spherical, partially spherical, or spheroidal, and can include an oblong shape such as an elongated spheroid, an elongated spheroid, or a partially spheroid, as well as cylindrical. Other shapes are possible for the pivot element 3.

[0108] The pivot element 3, regardless of its shape, can extend outwards from the axis support 2 in a first direction substantially perpendicular to the direction of P4253PC00 Specs (AOFF) the longitudinal axis of the axis support 2, being the straight line from one end 12 of the axis support to the other end of the axis support 2.

[0109] The shock absorber 4 may include a hollow space 66 configured to house the pivot element 3.

[0110] The damper 4 may include a conical portion 65 in contact with the pivot element 3 and acting, for example, as a damping cone for a standard shaft. The conical portion may surround a part of the pivot element 3, for example, when the pivot element is a sphere, a spheroid, or a cylindrical element.

[0111] According to a variant shown in Fig. 3, this hollow space 66 may include a hemispherical or partially spherical cavity. The hollow space 66 may be arranged in a slope on the lower surface of the damper 4.

[0112] The hollow space 66 increases the total surface area of ​​the shock absorber, and when the pivot element 3 is housed in the hollow space 66, the total surface area of ​​the axle support 2 coming into contact with the shock absorber through the surface or surfaces 63 and also the surface area of ​​the hollow space 66 is also increased.

[0113] Increasing the surface area of ​​the axle support 2 in contact with the shock absorber 4 has the advantageous effect of maintaining better contact between the axle support 2 and the shock absorber when the shock absorber is compressed or compressed. This can increase the energy transfer from the compression or compression on one side of the shock absorber to the rotation of the axle support 2, and also take advantage of the energy return when the compression or compression on that same side of the shock absorber 4 is released.

[0114] The compression or crushing of the shock absorber 4 and the release of the latter would occur, for example, when a user puts their weight on one side of a skateboard deck to which the axle 50 and therefore the shock absorber 4 are attached and when a user releases their weight, for example by making turns.

[0115] The increased energy transfer and energy return have the advantageous effect of reducing user effort and facilitating the execution of short radius turns, for example of 60 cm.

[0116] According to one embodiment of the invention, the hollow space 66 and / or the surface or surfaces 63 can be arranged in a slope, for example formed by the shock absorber or at least one lateral bending bar 6. The angle of the slope, shown as 45°, can vary. Preferably, the angle is between 25° and 75°.

[0117] According to a variant of the invention shown in Fig. 2, the lateral bending bar or bars 6 extending from the shock absorber 4 can extend downwards at an angle, for example at an angle of 45° with respect to a plane defined by the surface of the shock absorber 4 intended to be in contact with a deck of a skateboard or rolling device.

[0118] The bending bar or bars 6 can be terminated by bearing surfaces 63, which can also be arranged in a slope.

[0119] According to a variant of the invention shown in Fig. 3, the pivot element 3 can be partially hollowed symmetrically between its lower part 31 and its upper part 33, making it reversible for assembly.

[0120] The axis support 2 may include, for example at its center, a fixing element 9, shown in Fig. 3, optionally formed integrally with the axis support and / or the pivot element 3, and configured to receive at least one clamping element 8.

[0121] Several shapes are possible for this fixing element 9, for example, square, hexagonal, circular or semi-circular shapes.

[0122] The fixing element 9 may include an opening 91. The opening 91 of the fixing element may be aligned with an opening 7 of the shock absorber 4 allowing the passage of at least one clamping element 8 through the openings of all the parts to fix the shock absorber and the axle support 2 together.

[0123] The fixing element 9 can also connect the shock absorber 4 and the axle support 2 and the retaining cage 10.

[0124] According to a variant of the invention shown in Fig. 3, the fastening element 9 can be in the form of a perforated disc with an opening 91.

[0125] Fig. 3 also includes a variant of the invention compatible with the previous one including the pivot element 3 extending in a first direction outwards from the axis support 2, in which the fixing element 9 can extend outwards from the axis support 2 in a second direction substantially perpendicular to the direction of the longitudinal axis of the axis support 2 (being P4253PC00 Specs (AOFF) the line from one end 12 of the axis support to the other end of the axis support 2) and opposite to the first direction of the pivot element 3. Thus, the axis support 2 can pivot about the pivot element 3 and the fixing element 9.

[0126] The axle support 2 is configured to receive a wheel at each of its ends 12. These ends 12 can be mainly cylindrical in shape as shown in Fig. 3, preferably with a reduced diameter compared to the diameter of the central part of the axle support 2.

[0127] The ends 12 can be longitudinal projections of the axis support 2, in which the axis support 2 and its ends 12 form a single piece and are of the same material.

[0128] It is also possible according to another variant that the axle support includes an axle, the axle preferably being of a smaller diameter than the diameter of the axle support and its ends forming the ends 12 of the axle support 2. According to this variant of the invention, the axle and the axle support 2 can be two separate parts and therefore the axle and the axle support can comprise mainly the same material or different materials.

[0129] Many materials are suitable for manufacturing the axle and axle support, such as stainless steel, aluminum, titanium, steel, or fiberglass or carbon fiber composites. Other materials are also possible. For example, the axle itself could be primarily made of stainless steel, while the axle support might be primarily made of aluminum.

[0130] According to the variant of the invention shown in Fig. 3, the ends 12 can be threaded to receive wheels 17 by tightening a nut or according to other variants may include any other means for fixing the wheels to the ends 12.

[0131] According to a variant of the invention best represented in Fig. 2, the axle support 2 may include fastening means 19 configured to receive mudguards 18 allowing to cover at least part of the wheels 17. The fastening means 19 are configured to ensure good orientation of the mudguards, in particular so that the mudguards cover an upper part of the wheels thus avoiding any risk of contact between the user's feet and the wheels.

[0132] According to a variant of the invention shown in Fig. 2, the fastening means 19 may include a fastening means having a geometric shape, for example, a square, designed to receive a mudguard 18 having a corresponding opening. This configuration ensures correct and stable orientation of the mudguard. The precise interlocking of the two geometrically shaped P4253PC00 Specs (AOFF) elements guarantees that the mudguard remains aligned and held firmly in place, thus minimizing unwanted movement. This configuration ensures secure fastening of the mudguards, allowing them to be fixed with a precise orientation and preventing any risk of contact with the user's feet.

[0133] The axis 50 further includes a retaining cage 10 comprising a second material, the retaining cage 10 comprising guide means configured to guide a displacement of the axis support 2 when the axis support 2 compresses the damper 4.

[0134] According to a variant of the invention shown in Figs. 2 and 4, the axle 50 can be assembled using at least one clamping element 8, the shock absorber 4 being the upper part, intended to be in contact with the deck of a skateboard, the retaining cage 10 being the lower part which surrounds both the shock absorber 4 and the axle support 2, and the at least one clamping element passing through openings arranged on the shock absorber, the axle support, and the retaining cage. The axle support 2 can therefore be sandwiched between the shock absorber 4 at the top and the retaining cage 10 at the bottom.

[0135] The assembled axle 50, including the shock absorber 4, the axle support 2, the retaining cage 10 and at least one clamping element 8, can be fixed to a skateboard deck using the fixing means 13, 132.

[0136] The retaining cage 10 then acts as the foundation for the assembled axle 50. The retaining cage 10, in contact with the axle support 2 and the damper 4, holds the damper 4 and the axle support 2 in place when the damper 4 is compressed or crushed by the axle support 2 and allows the axle support 2 to pivot within a limited radius when one side of the damper is compressed or crushed, for example when a user steps onto the deck of a skateboard to which the axle 50 is mounted.

[0137] Elements 2, 4, 8, 10 of the axle 50 work advantageously together to support the forces and pressure to which the axle 50 is subjected when the damper 4 is compressed or crushed, or compressed or crushed on one side, for example when a user gets on the deck of a skateboard to which the axle 50 is mounted or when the user makes turns by putting more of their weight on one side of the deck than the other.

[0138] The retaining cage 10 protects against surrounding impacts and provides the axis support 2 with linear movement, which is guided a few millimeters along the inside of the retaining cage. This linear movement helps to dampen shocks and vibrations caused by uneven ground. P4253PC00 Specs (AOFF)

[0139] The retaining cage 10 guides a displacement of the axis support 2, for example the displacement which is the rotation or pivoting in the horizontal plane parallel to the ground of the axis support 2 when the damper 4 is compressed on one side, or the displacement which is in a direction at least partially vertical caused by shocks or vibrations from the ground relief.

[0140] The retaining cage 10 includes guiding means configured to guide or accompany a movement of the axis support 2.

[0141] According to a variant shown in Fig. 2, an inner surface of the retaining cage includes bearing surfaces 103. The bearing surfaces 103 can be used to guide the linear displacement of the axis support 2 during shocks, for example, the axis support can be guided a few millimeters along the bearing surfaces 103.

[0142] The bearing surfaces 103 can also accommodate a surface of the damper 4, for example, a surface of the bending bar(s) 6. The bearing surfaces 103 can act as a foundation, supporting the damper 4 and the axis support 2 when the damper is compressed or crushed by the axis support 2 and holding the axis support 2 within a radius of rotation.

[0143] According to a variant of the invention shown in Fig. 2, the support cage may be in the form of an arch or an arc, or an inverted arch or an inverted arc. The support cage may be in the form of a "U" or an inclined "U" comprising a lower part in a curved shape and two straight or inclined parts.

[0144] The lower part and the straight or inclined parts can form an integral surface.

[0145] The straight or inclined parts of the support cage 10 may include a bearing surface 103 or bearing surfaces 103. The bearing surface may be a solid surface without relief or may include several surfaces with relief.

[0146] According to a variant of the invention shown in Fig. 2, the support surfaces 103 can form a ramp or an inclined plane, for example, an upward ramp or an ascending ramp. The ramp or inclined plane can form a variable angle with the horizontal plane of the ground, preferably between 25° and 75°, for example, 45°. P4253PC00 Specs (AOFF)

[0147] The retaining cage may include a lightening window 106. According to a variant of the invention shown in Fig. 2, the bearing surfaces 103 include a lightening window 106.

[0148] The retaining cage 10 may optionally include a housing 11 for the pivot element 3, illustrated in Fig. 2. For example, the lower part in a curved form may include the housing 11. This housing 11 may optionally be integrally formed with the bearing surfaces 103. The housing 11 together with the bearing surfaces 103 retain the axle support 2 and support the axle 50 when the shock absorber is compressed or crushed, for example, when a user stands on the deck of a skateboard to which the axle 50 is mounted.

[0149] The arch shape can be arranged on a slope at a variable angle, the angle being that of the line following the bearing surfaces 103 with the horizontal plane of the ground. The bearing surfaces 103 can form a ramp. Preferably, this angle is between 25° and 75°.

[0150] Thus, the axis support 2 can be guided over a few millimeters of the slope formed by the bearing surfaces 103. The slope allows this movement to be directed in a direction that is on the one hand vertical and on the other hand horizontal, thus making this movement less noticeable and therefore more comfortable for the user.

[0151] Preferably, the retaining cage 10 comprises or mainly comprises a second material that is more rigid than the first material of the shock absorber 4. The retaining cage may be mainly composed of a second material that is more rigid, or less flexible, than the first material.

[0152] The material of the restraint cage may include, for example, a metallic material such as aluminum, or a material from the family of thermoplastic polymers or polyesters, or from the polyaryletherketone family, for example, polyetheretherketone. The first material may include aluminum or polymers containing glass fibers.

[0153] For example, the cage material may include a medium viscosity acetal homopolymer comprising 20% ​​glass fibers for injection molding.

[0154] According to a variant of the invention shown in Fig. 2, the retaining cage 10 further comprises a hollow space 105 to guide the pivot element 3 through a linear displacement of a few millimeters. The bearing surfaces 63 may include, for example, the hollow space 105. The hollow space may include, for example, a relief window 106. This hollow space 105 (P4253PC00 Specs (AOFF)) may be arranged in a slope with a variable angle of the same degree as the angle of arrangement of the bearing surfaces.

[0155] The hollow space 105 can be in a configured shape to guide the pivot element 3.

[0156] For example, when the pivot element is spherical, the hollow space 105 may include a curved, hollowed, and elongated surface configured to guide the displacements of the pivot element 3 caused by shocks or vibrations. The spherical shape maximizes the contact between the pivot element 3 and the damper 4 and also reduces friction.

[0157] The hollow space 105 allows for better guidance of the movements of the axis support 2, especially when the axis support 2 includes a pivot element 3.

[0158] The retaining cage 10 may further include an opening 112 configured to receive at least one clamping element 8. The opening 91 of the fixing element 9 may be aligned with an opening 91 of and with an opening 7 of the shock absorber allowing the passage of at least one clamping element 8 through the openings of all the parts to fix the shock absorber 4 and the axle support 2 together.

[0159] Alternatively, the retaining cage 10 may further include an opening 112 configured to receive at least one clamping element 8. The opening 112 of the retaining cage 10 may be aligned with an opening 91 of the fixing element 9 and with an opening 7 of the shock absorber allowing the passage of at least one clamping element 8 through the openings of all the parts to fix together the shock absorber 4, the axle support 2, and the retaining cage 10.

[0160] The assembly of parts 2, 4, 8, 10 can be advantageously reinforced by fastening means 13, 131, 132, for example a plurality of screws, nuts, washers, or any other means configured to fix the parts together.

[0161] According to a variant of the invention illustrated in Figs. 2 and 4, the retaining cage may include one or more openings 101 configured to receive fastening means 13, 132 which can be aligned with the opening(s) 42 of the shock absorber 4 to reinforce the assembly of the axle elements 50 and / or to fix the axle to a skateboard deck, for example the deck 1 illustrated in Fig. 1. P4253PC00 Specs (AOFF)

[0162] According to variants of the invention, the retaining cage 10 may further optionally include one or more of the following elements: a shock absorber housing 102, a standard skateboard finishing radius 104, an oblong window 106 for lightening and visibility of the shock absorber 4, which becomes a communication space, a radiused lip 107 of the bearing surfaces 103, an inclined and radiused inner area 108 of the end of travel of the axle support 2, an inclined and radiused outer area 110 of the end of travel of the axle support 2, an outer surface 111 of the housing 11 for the pivot element, and / or a retaining bracket 113 between the shock absorber 4 and the retaining cage 10.

[0163] According to a variant compatible with the previous ones, the retaining cage 10 can optionally be drilled with a hole 109 which is located in the lower part of the retaining cage, facilitating the evacuation of residual water from the retaining cage 10. According to a non-limiting variant of the invention shown in Fig. 4, the retaining cage includes a housing 102 for the shock absorber 4.

[0164] The retaining cage may include an opening 62 allowing part of the shock absorber 4 to be visible, for example to affix a logo or any other mark for communication and marketing purposes.

[0165] The axle 50 further includes at least one clamping element 8 configured to connect the shock absorber 4, the axle support 2, and / or the retaining cage 10 together and to hold the axle support 2 against the shock absorber 4. This at least one clamping element may include, for example, a screw and bolt, or a nut. Other clamping elements are possible, such as the kingpins typical of skateboards.

[0166] According to one variant of the invention, at least one clamping element 8 comprises a base 82. The damper 4 may optionally comprise a surface 44 configured to receive the base and is advantageous for adjusting rotational moment forces of the axes.

[0167] The 50 axis can include a second 14 damper, which gives the 2 axis support additional cushioning as well as greater freedom of movement.

[0168] The second shock absorber 14 may mainly comprise the same material as the first material of the shock absorber 4 or may mainly comprise another material.

[0169] The second shock absorber 14 may comprise, for example, an elastomeric material, such as a thermoplastic elastomer, e.g., thermoplastic polyurethane. The second shock absorber may further or alternatively comprise other damping materials such as rubber, silicone, cork, foam, and / or neoprene. The second shock absorber may have a cone or partial cone shape, or may have other spherical or partially spherical or spheroidal shapes.

[0170] At least one clamping element can bear on the second shock absorber 14 and / or the second shock absorber 14 can be arranged on at least one clamping element 8, for example in contact with the axle support 2, opposite to where the axle support 2 is in contact with the shock absorber 4.

[0171] Alternatively, the second shock absorber 14 can be arranged on the retaining cage 10.

[0172] According to one variant of the invention, the second shock absorber 14 and / or a clamping washer 15 and a nut or bolt 16 are assembled on a screw in order to connect the shock absorber 4, the axle support 2 and / or the retaining cage 10.

[0173] Alternatively, the clamping washer 15 can be replaced by the retaining cage on which the nut comes into contact when tightening.

[0174] The axle support 2 can therefore be held in place between the shock absorber 4 and the retaining cage 10, sandwiched by the shock absorber 4 and the retaining cage 10, and at least one clamping element 8 holds the axle support 2 against the shock absorber 4 and connects the shock absorber 4, the axle support 2 and / or the retaining cage 10.

[0175] When a user places their foot on the top of a skateboard deck, their weight is distributed among the shock absorber 4, which is in contact with the underside of the skateboard deck, the axle support 2, the retaining cage 10, and at least one clamping element. The retaining cage includes guide means configured to guide the movement of the axle support 2 when the axle support 2 compresses the shock absorber, that is, when a user places their foot on the skateboard deck.

[0176] At least one clamping element 8 is configured to connect the shock absorber 4, the axle support 2 and / or the retaining cage 10 together and to hold the axle support 2 in contact with the shock absorber 4.

[0177] The configuration of elements 2, 4, 8, and 10 of the 50mm axle allows for a very compact 50mm axle compared to standard skateboard axles. This allows the skateboard deck height to be lowered to, for example, 6 cm from the ground, compared to 10 cm for a skateboard with conventional axles. This makes skateboarding easier to use by lowering the balance point. P4253PC00 Specs (AOFF)

[0178] In addition, the shock absorber 4, due to its manufacturing material and its placement in the 50 axle, gives the 50 axle additional cushioning compared to a normal axle, making a skateboard including the 50 axle more comfortable for the user.

[0179] The axle 50, according to the variants of the invention discussed above, can be mounted on a rolling device such as a skateboard, longboard, folding skateboard, etc. The two axles 50 forming a pair can be identical in their design and assembly; for example, they can be mounted in a mirrored fashion on a rolling device according to the same principles as a conventional skateboard. The position of the axle on the deck can also vary. Fig. 9 shows the adjustment of the position of the axle 50 on a skateboard deck. The deck may include holes or means for attaching the axle, for example, spaced 12 mm apart.

[0180] The rolling device according to variants of the invention is shown, for example, in Fig. 9. The rolling device comprises at least one axle 50 according to variants discussed previously. The rolling device may further or alternatively comprise a front platform 1 and a rear platform 1', a hinge 21 configured to connect the two platforms 1 and 1', which has the effect of making the rolling device foldable. Thus, the combination of a foldable skateboard and the axle 50 according to the invention results in an extremely compact skateboard, with dimensions when folded (Fig. 15) close to A4 size. Such a skateboard can therefore be easily sent, stored, packed away, and transported, for example in a backpack, a satchel, or even simply hung from a strap and carried over the shoulder by its user.

[0181] The device may further include a braking mechanism 26 at the rear of the rear platform 1', the braking mechanism 26 being designed to contact the ground by tilting the rear platform under gravity when the user of the rolling device is absent. When the user is absent, the hinge 21 generates direct and automatic braking (Fig. 12) by the natural tilting of the rear platform 1' under the weight of the braking mechanism 26. The braking mechanism 26 may, in one variant, be a pair of standard commercial roller skate brakes positioned at the end of the rear platform and held in place with appropriate fasteners, for example, standard commercial screws 261.

[0182] The braking mechanism 26 is thus brought directly into contact with the ground when the user needs to eject or when the object is stationary. This braking mechanism 26 and its compact size when the mini-skate is folded, as shown in Figs. 14 and 15, make it a reassuring rolling object, well-suited to the immediate environment of pedestrians and other urban users. P4253PC00 Specs (AOFF)

[0183] The hinge 21 of the rolling device, through the support of the lateral foot on the rear platform 1 (Fig. 13), also allows intentional braking by the user using the braking mechanism 26. This is achieved by changing the angle formed between the two platforms 1 and 1', creating contact with the ground through regulated pressure from the braking mechanism 26. This braking allows the user to modulate and control their speed without putting their foot down, particularly on slight inclines.

[0184] According to specific modes of implementation:

[0185] - Axis 50 can have different widths and overall dimensions.

[0186] - The 50 axes can be placed at a variable distance from each other.

[0187] - The diameter of the wheels and mudguards can also vary.

[0188] - The dimensions and shapes of the two trays may also vary.

[0189] The distance between the two axes can be adjusted, for example, between 213 and 261 mm from axis to axis, which allows the turning radius possible for the mini-skate or rolling device to be reduced or increased.

[0190] The assembly of a folding hinge with two axes of rotation of 90° is shown in Figs. 6, 7, and 8.

[0191] The mini-skate can be folded back on itself thanks to a hinge 21 in the center of the device, composed of two slides 22, 22' with two inclined faces 224 on its lateral and straight sides 225 near the hinge connection point 21. The two slides can be generously lightened by cutouts 223.

[0192] The slide comprises a front slide 22 and a rear slide 22'. The slides can be manufactured as a single piece or as two separate pieces. According to one embodiment of the invention, the front slide 22 can be longer than the rear slide 22'. The front slide 22 can include several mounting holes 222, for example, 16 holes, which allows for a length adjustment range of the front shaft over four positions, as illustrated in Fig. 1 and Fig. 9. This effect is also visible on the slide by one or more rounded spaces 221, for example, four rounded spaces, to provide clearance for the shaft at the end of its travel.

[0193] According to another aspect of the invention illustrated in Figs. 7 and 8, the slide 22 can accommodate between its inclined faces 224, optionally, a hinge lock 29 made of a bent rod in the shape of a “U” which advantageously butts against folded claws 226, for example two claws, in its “rear” end of travel, which is the position which can release the hinge to fold the mini-skate, and which butts against P4253PC00 Specs (AOFF) several fixing screws 227, for example two screws, in its “front” end of travel, a position which can lock the hinge in the open position, preventing it from folding.

[0194] This hinge lock 29 can pass through the connecting piece 23, the connecting dampers 24, for example two connecting dampers 24, then under the two hinge rotation axes 25 to end its travel between the two inclined faces 224 of the rear slide 22' of the hinge device.

[0195] The slide may include a rear slide 22' positioned at the rear of the device. It can accommodate the rear axle in a position on the platform 1' with optionally at least two axle passages 221 to better accommodate and retain the axle at the end of its travel. According to a variant of the invention illustrated in Fig. 1, the slide can accommodate the rear axle in a predetermined and fixed position with two axle passages 221.

[0196] These two slides can be connected together by a U-shaped connecting piece 233 comprising several holes 234, for example four holes, for the passage of the two axes of rotation 25, several stops, for example four stops, for the end of rotation at 90° 233 in the form of claws.

[0197] This link 23 houses in the center of the device two shock absorbers, optionally identical, 24 preferably positioned symmetrically with a common contact face 235 when the mini-skate is open having one or more braking energy reliefs 237, the upper part of which can be locked by a relief 232 taken up by the slides 22 or 22' in the lightening 236 and also in the platforms 1, 1' by fins 229 in housings 230, for example two fins and two housings, provided for this purpose.

[0198] Optionally, a stop 231 for contacting the link 23 in the folded position is located on the inner edge of the central part of the shock absorbers 24, which is hollowed out 228 to be passed through and blocked by each of the rotation axes 25 of the hinge 21. The two rotation axes of the hinge 25, fixed by four nuts 251 or any other crimping system at their ends, allow the mini-skate to be folded upon itself, thus making it extremely compact for transport [Fig. 14].

[0199] The mini-skate thus achieves a 50% reduction in its extended length and an optimal, parallel folded thickness of 66 mm, thanks to the precise positioning and interlocking of the axles 50, wheels 17, and brakes 26 one behind the other [Fig. 14], (Fig. 15). This hinge 21, thanks to its two shock absorbers 24, provides a soft comfort zone between the two platforms 1 and 1' through the slight compression of the two shock absorbers 24 and the energy reliefs 237 when the take-off foot is pressed against the center of the mini-skate in its horizontal position (Fig. 11). P4253PC00 Specs (AOFF)

[0200] Figures 12 and 13 respectively depict involuntary and voluntary braking. The mini-skate has two standard Roller-Skate 26 brakes, positioned at the end of the rear deck and held in place by two standard screws (261).

[0201] It is the hinge 21 that generates direct and automatic braking (Fig. 12) through the natural gravity tilting of the rear platform 1' due to the forward position of the rear axle 50 of the mini-skate, the weight of the brakes 26 when the user is absent, reinforced by the energy supports 237. The brakes 26 are brought directly into contact with the ground when the user needs to eject or when the object is stationary. This automatic braking system and its compact size when the mini-skate is folded, as shown in Figs. 14 and 15, make it a reassuring rolling object, well-suited to the immediate environment of pedestrians and other urban users.

[0202] According to one embodiment of the invention, the hinge 21 includes elastic stop means configured to come into contact and compress when the plates 1, 1' are aligned horizontally and a force is applied, for example by a user on the plate or plates, and to decompress when the force is no longer applied, so that the plates 1, 1' move to a position forming an angle.

[0203] The hinge 21 of the mini-skateboard, through the support of the lateral foot on the rear platform 1' (Fig. 13), also allows for intentional braking by the user. This is achieved by changing the angle formed between the two platforms 1 and 1', creating contact with the ground through regulated pressure from the two brakes 26. This braking allows the user to modulate and control their speed without putting their foot down, particularly on slight inclines.

[0204] The braking mechanism (26) can be configured to be in contact with the ground when the platforms (1, 1') are in the angled position. This has the advantage of locking the rolling device, for example when no user is present on it.

[0205] Steering, adjusting the strap and front axle and grips of the mini-skate, (Fig.9), (Fig.10), (Fig.11):

[0206] Although extremely compact in size (Fig. 16), the mini-skateboard offers four standard size adjustment ranges, thanks to sixteen holes 281 accommodating the four screws 28 for attaching the foot strap and sixteen through holes 282 for securing the front axle 50 of the mini-skateboard. These holes 282 are machined into the front deck 1 and are available to accommodate the user's shoe size. The front deck 1 is therefore pre-drilled with holes 281 and 282 to easily allow for this new installation. The user simply needs to manually pierce the anti-slip grip 51 using a P4253PC00 Specs (AOFF) drill bit to access the necessary holes 282 in the deck 1 and 224 in the slide 22 (Fig. 7) (Fig. 8). The axle and strap of the mini-skate are mounted in the second shoe size position from its center during factory assembly, which is the middle position out of the four offered.The foot strap 27 is also adjustable in position and width using a lace 271 and / or Velcro. It is included as standard on the mini-skateboard, but the user is free to not install it.

[0207] As a reminder, it also has the option of being able to lock the hinge using a hinge lock 29 sliding inside the front slide 22 which passes through the link 23 and the two central shock absorbers 24 and extends by fitting into the rear slide 22' in the event that the user does not want the folding and automatic brake of the mini-skate and prefers a rigid mini-skate.

[0208] Storage, folding and organization by reducing length and volume by half:

[0209] The mini-skate, by its dimensions in open position (Fig.16) or when folded (Fig.14) and (Fig.15) is close to the A4 format. It can be easily sent, stored, put away and transported, for example in a backpack, a bag or even simply hung on a strap and carried over the shoulder by its user [Fig.14]. The mini-skate in folded position is designed so that no wheel surface can be in contact with the user when handling it; the wheels 17 being covered on one side by the mudguards 18 and by two areas, 283 on deck 1 and 284 on deck 1' (Fig.7) arranged for this purpose and clearly visible on [Fig.14] and (Fig.15).

[0210] The axle can have the dimensions 210 x 76 x 36 mm (L x W x H) without the wheels and H becomes 61 mm with the wheels.

[0211] The mini-skate can have the dimensions 480 x 210 x 61 mm open and 240 x 210 x 66 mm closed (L x W x H).

[0212] It will be understood that various modifications and / or improvements obvious to a person skilled in the art can be made to the different embodiments of the invention described in this description without departing from the scope of the invention as defined by the attached claims.

[0213] The invention is obviously not limited to the examples illustrated in this application.

Claims

P4253PC00 Specs (AOFF) DEMANDS 1. A skateboard axle (50), the axle (50) comprising: - a shock absorber (4) comprising a first material, the shock absorber being intended to be in contact with a deck of a skateboard; - an axle support (2) intended to receive a wheel at each of its ends; -a retaining cage (10) arranged on the shock absorber (4) and comprising a second material, the retaining cage comprising guiding means configured to guide a displacement of the axle support (2) when the axle support (2) compresses the shock absorber (4); and - at least one clamping element (8) configured to connect the shock absorber (4) and the axle support (2) and to hold the axle support (2) against the shock absorber (4).

2. An axle (50) according to claim 1, characterized in that the clamping element (8) is configured to connect the damper (4) and the axle support (2) and the retaining cage (10).

3. An axis (50) according to claim 1, characterized in that the first material is less rigid than the second material.

4. An axis (50) according to any one of the preceding claims, characterized in that the axis support (2) comprises a pivot element (3).

5. An axis (50) according to the preceding claim, characterized in that the pivot element (3) comprises a sphere, or spheroid or cylinder shape perpendicular to the axis.

6. An axis (50) according to any one of claims 4 or 5, characterized in that the pivot element (3) extends outwards from the axis support (2) in a first direction.

7. An axle (50) according to any one of the preceding claims, wherein the axle support (2) comprises a fixing element (9) configured to receive at least one clamping element (8).

8. An axis (50) according to claim 7, characterized in that the fixing element (9) extends outwards from the axis support (2) in a second direction opposite to the first direction. P4253PC00 Specs (AOFF) 9. An axle (50) according to any one of the preceding claims, characterized in that the damper (4) comprises a surface (63) configured to keep the axle support (2) in contact with the damper when the axle support (2) compresses the damper (4).

10. An axle (50) according to any one of claims 4 to 9, characterized in that the damper (4) comprises a hollow space (66) configured to house the pivot element (3). 1 1. An axis (50) according to any one of the preceding claims, characterized in that the retaining cage (10) comprises an arch shape.

12. An axis (50) according to any one of the preceding claims, characterized in that the first material of the damper (4) mainly comprises a material from the family of thermoplastic elastomers.

13. An axis (50) according to any one of the preceding claims, characterized in that the second material of the retaining cage (10) mainly comprises a metallic material or a material from the family of thermoplastic polymers or polyesters.

14. A rolling device of the skateboard type comprising the axle (50) according to any one of the preceding claims.

15. A rolling device of the folding skateboard type, - comprising a front platform (1) and a rear platform (1'); - a hinge (21) configured to connect the two trays (1, 1') and allow their movement between a folded position in which the front tray (1) and the rear tray (1') are arranged so that an underside of the front tray (1) is in contact with an underside of the rear tray (1') and an open position in which the front tray (1) and the rear tray (1') are horizontally aligned; and - the axis (50) according to claim 1.

16. The rolling device according to the preceding claim, characterized in that the hinge (21) comprises elastic stop means (237) configured to come into contact and compress when the plates (1, 1') are aligned horizontally and a force is applied and to decompress when the force is no longer applied, so that the plates (1, 1') move to a position forming an angle. P4253PC00 Specs (AOFF) 17. The rolling device according to any one of claims 15 and 16, characterized in that it comprises a braking mechanism (26) at the rear of the rear platform (1'), the braking mechanism (26) being configured to be in contact with the ground when the platforms (1, 1') are in the position forming an angle.

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