Wheel axle and rolling toy
The wheel axle design with a screw, friction cheek, and nut with anti-rotation elements addresses issues of wheel loosening and tightening in rolling toys, enabling tool-free assembly and controlled braking.
Patent Information
- Authority / Receiving Office
- FR · FR
- Patent Type
- Patents
- Current Assignee / Owner
- JURATOYS
- Filing Date
- 2024-08-02
- Publication Date
- 2026-06-26
AI Technical Summary
Existing wheel axles in rolling toys can become partially driven in rotation, leading to unintended tightening or loosening of wheels, requiring tools for assembly and adjustment, and making it difficult to ensure uniform tightening across multiple wheels.
A wheel axle design featuring a screw, friction cheek, and nut with anti-rotation elements that allow for manual assembly and adjustment without tools, preventing wheel rotation from affecting screw tightening and allowing for controlled friction braking.
Ensures stable wheel attachment, prevents unintended tightening or loosening during use, and allows for easy adjustment of friction braking without tools, facilitating uniform assembly and disassembly.
Smart Images
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Abstract
Description
Title of the invention: Wheel axle and rolling toy Technical field of the invention
[0001] The present invention relates to a wheel axle for a rolling toy, particularly for children, such as a walker or a portable toy. The invention also relates to a rolling toy. Technical background
[0002] Rolling toys, and in particular the walker, help toddlers to acquire balance, as the child can use the toy to stand up, and then gradually learn to walk by pushing the rolling toy.
[0003] The axles of the wheels of the rolling toy are generally threaded and tightened to the carriage by a respective nut. Adjusting the tightening force allows the resistance exerted on the wheels by friction with the chassis to be regulated, and thus allows the force required to move the rolling toy to be adjusted by continuous braking of the wheels.
[0004] This braking can allow the child to avoid moving too fast at the beginning of his learning or can allow the rolling toy to be immobilized, for example so that the child learns to stand up or so that the child can play with the activities offered on the toy without it moving.
[0005] One drawback is that the axle of the wheel thus assembled tends to be partially driven in rotation by the wheel in use. Rolling in the same direction can cause the wheel to tighten, braking the rolling toy more than necessary, or even immobilizing it completely, or conversely, can cause the wheel to loosen, or even detach from the chassis.
[0006] Another problem is that, in the case of self-assembly rolling toys, the user must have a suitable tool for tightening the screws, or the manufacturer must provide the appropriate tool with the toy. Similarly, the tool must be used again to tighten any wheels that have come loose or to loosen any wheels that have tightened unintentionally, as mentioned above. Also, when assembling a multi-wheeled rolling toy, it is not always easy for the user to tighten all the wheels with the same degree of force. Summary of the invention
[0007] One of the aims of the present invention is to propose a wheel axle which makes it possible to resolve at least partially the disadvantages of the prior art.
[0008] To this end, the invention relates to a wheel axle configured to be assembled to a rolling toy panel, such as a walker or a portable toy, characterized in that the wheel axle comprises: - a screw with a screw head mounted on a threaded rod, - a friction cheek configured to be interposed between the panel and a wheel of the rolling toy, while being fixed in rotation relative to the panel, the friction cheek having a central opening, - a nut having a nut head surmounting a threaded tubular portion intended to pass through a wheel hub, the central orifice of the friction cheek and an orifice of the panel, the threaded shank of the screw being configured to be screwed into the tubular portion of the nut to fix the wheel mounted on the wheel axle to the panel of the rolling toy, the number of turns of the screw modulating the friction braking of the wheel, the central orifice of the friction cheek or the orifice of the panel and the tubular portion of the nut having complementary anti-rotation elements assembled by the axial engagement of the tubular portion of the nut in the central orifice of the friction cheek or in the orifice of the panel, these anti-rotation elements making it possible to immobilize the nut in rotation relative to the panel.
[0009] During assembly and disassembly of the rolling toy, the additional anti-rotation elements allow the nut to be held in position relative to the panel, which allows the wheel axle to be screwed and unscrewed.
[0010] When rolling, the wheel rotates around the axle, which is prevented from rotating relative to the panel by the anti-rotation elements. The axle therefore cannot tighten or loosen. The wheel is in contact with elements fixed relative to the chassis panel, so the wheel's rotation has no effect on the tightening of the screw. Rolling the toy cannot therefore cause any changes in the screw's tightening force and thus cannot cause the wheel to tighten or loosen during use, while still allowing the wheel's freedom of movement to be adjusted, enabling the user to lock, brake, or release the toy's rotation.
[0011] The assembly of the anti-rotation elements by axial mechanical engagement of the tubular portion of the nut in the central orifice of the friction cheek or in the orifice of the panel is also simple, does not require gluing means, tools or other additional fixing parts.
[0012] The wheel axle may further include one or more of the characteristics described below, taken alone or in combination.
[0013] According to one embodiment, the friction cheek is configured to be removably attached to the panel of the rolling toy.
[0014] The friction cheek and the panel have, for example, at least one stud and at least one additional hole, one formed in the friction cheek, the other in the panel.
[0015] The anti-rotation elements are for example formed by at least one radial tooth and at least one complementary notch, the anti-rotation element formed in the tubular portion extending in an axial direction from one end of the tubular portion so that the complementary anti-rotation element can engage axially with the anti-rotation element by sliding along the tubular portion with the tightening or loosening of the screw.
[0016] According to another embodiment, the anti-rotation elements are formed by complementary non-circular assembly shapes of the panel opening and the tubular portion of the nut. In this case, the central opening of the friction cheek may also have a complementary non-circular assembly shape in order to be rotationally fixed relative to the panel.
[0017] According to one embodiment, the screw head forms a handle allowing manual tightening of the screw.
[0018] According to one embodiment, the nut is through, the wheel axle having a hubcap having a hubcap head and a hubcap stem, the hubcap stem being configured to fit into the tubular portion of the nut through the nut head to be removably fixed to the threaded stem of the screw, the hubcap head assembled to the threaded stem forming a stop for loosening the screw.
[0019] According to one embodiment, the threaded rod of the screw is hollow, the trim rod fits into the threaded rod, the trim rod and the threaded rod having complementary clipping elements to clip the trim rod into the threaded rod.
[0020] According to one embodiment, the thread of the threaded rod and the thread of the tubular portion of the nut have at least one indexing lug and an additional notch to index at least one operating position depending on the tightening of the screw.
[0021] For example, at least two diametrically opposed indexing lugs are provided in the helical groove of the thread and at least two complementary notches are provided in the helical rib of the thread.
[0022] The invention also relates to a rolling toy comprising at least one wheel, such as a walking cart or a nomadic toy, characterized in that it comprises at least one wheel axle as described above, which can be removably fixed to a panel of the rolling toy and on which a wheel of the rolling toy can be mounted in rotation.
[0023] At least one indexed operating position may correspond to a tightening position for which the wheel is likely to roll without braking and / or at least one indexed operating position may correspond to a tightening position for which the wheel is braked by friction during rolling and / or at least one indexed operating position may correspond to a clamping action in which the wheel is blocked from rotating by friction. Brief description of the figures
[0024] Other advantages and features will become apparent from the following description of a particular, but by no means limiting, embodiment of the invention, as well as from the accompanying drawings in which:
[0025] [Fig-1] Fig. 1 shows a perspective view of an example of a rolling toy.
[0026] [Fig.2A] The [Fig.2A] shows a perspective view of a wheel axle of the rolling toy of the [Fig.1].
[0027] [Fig. 2B] [Fig. 2B] shows an axial cross-sectional view of the wheel axle of [Fig. 2A].
[0028] [Fig. 3] [Fig. 3] shows an exploded view of the wheel axle of [Fig. 2A].
[0029] [Fig.4A] The [Fig.4A] shows a perspective view of a screw of the wheel axle of the [Fig.2A].
[0030] [Fig.4B] The [Fig.4B] shows a reversed view of the screw of the [Fig.4A].
[0031] [Fig. 5A] [Fig. 5A] shows a perspective view of a friction cheek of the shaft of the wheel of the [Fig.2A].
[0032] [Fig.5B] The [Fig.5B] shows a reversed view of the friction cheek of the [Fig.5A].
[0033] [Fig. 6A] Fig. 6A shows a perspective view of a wheel axle nut the [Fig.2A].
[0034] [Fig.6B] The [Fig.6B] shows a reversed view of the nut of the [Fig.6A].
[0035] [Fig.7A] [Fig.7A] shows a perspective view of a wheel axle cover of the [Fig.2A].
[0036] [Fig.7B] [Fig.7B] shows a reversed view of the hubcap of [Fig.7A].
[0037] [Fig.8] Fig.8 shows a view similar to Fig.3 for another example of an embodiment of the wheel axle.
[0038] In these figures, identical elements bear the same reference numbers. Detailed description
[0039] The following embodiments are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments can also be combined or interchanged to provide other embodiments without departing from the scope of the invention as defined by the claims.
[0040] The axial direction is defined as the direction in the axis of rotation of the wheel axle and the transverse direction as a direction perpendicular to the axial direction.
[0041] Fig. 1 shows an example of a rolling toy 1 in particular for a child.
[0042] The rolling toy 1 includes at least one wheel axle 2, in particular removable, on which a wheel 3 of the rolling toy 1 can be mounted to rotate around an axis of rotation II ([Fig.3]).
[0043] The rolling toy 1 may comprise one or more sets 4 of wheel axles 2 and wheels 3, such as one or two pairs of sets 4 as shown in [Fig.1].
[0044] The rolling toy 1 is, for example, a walker designed to help toddlers learn balance and then walking. The rolling toy 1 can also be any rolling object for children, such as a portable toy like a stroller, a playpen, or a stall like a florist's, grocery store, etc. The rolling toy 1 can also offer multiple activities and include, for example, mirrors, gears to rotate, mazes, etc.
[0045] The wheel axle 2 is configured to be assembled to a panel 5 of the rolling toy 1, such as an upright, a cross member or a side member of a chassis of the rolling toy 1, for example made of wood.
[0046] As more clearly seen in figures 2A, 2B and 3, the wheel axle 2 has a screw 6, a friction cheek 7 and a nut 8.
[0047] The screw 6 has a screw head 61 mounted on a threaded rod 62 (figures 4A, 4B).
[0048] According to one embodiment, the screw head 61 forms a handle allowing a Manual tightening of screw 6. For this purpose, screw head 61 has, for example, two diametrically opposed lugs forming a handle that facilitates one-handed rotation. Any type of screw head with a handle is suitable, particularly a knurled or star-shaped handle, especially one with three, four, or more prongs. Screw 6 can thus be tightened manually without tools.
[0049] The friction cheek 7 is configured to be interposed between the panel 5 and a wheel 3 of the rolling toy 1, being fixed in rotation relative to the panel 5. The friction cheek 7 has, for example, a disc shape and a central orifice 71, in particular circular.
[0050] According to one embodiment, the friction cheek 7 is configured to be removably attached to the panel 5 of the rolling toy 1.
[0051] According to an example embodiment of the means for the removable fixing of the friction cheek 7 to the panel 5, the friction cheek 7 and the panel 5 have at least one stud 72, for example cylindrical, extending in the axial direction, and at least one additional hole 51, one formed in the friction cheek 7, the other in the panel 5 (Figures 3, 5A, 5B).
[0052] At least one stud 72 is for example formed in the friction cheek 7 and the complementary hole 51 in the panel 5.
[0053] There are at least as many complementary holes 51 as there are pins 72. For example, there are two pins 72 diametrically opposed with respect to the central hole 71 and two complementary holes 51 diametrically opposed with respect to an orifice 52, for example cylindrical, of the panel 5 through which the wheel axle 2 is mounted ([Fig.3]).
[0054] The nut 8 has a nut head 81 surmounting a tubular portion 82 that is cylindrical on the outside and threaded on the inside. The tubular portion 82 is intended to pass through a hub of a wheel 3 of the rolling toy 1, the central opening 71 of the friction cheek 7 and the opening 52 of the panel 5, the friction cheek 7 being interposed between a face of the panel 5 and a flank of the wheel 3 (Figures 3, 6a, 6B).
[0055] The threaded rod 62 of the screw 6 is configured to be screwed into the tubular portion 82 of the nut 8 from the other side of the panel 5, to fix the wheel 3 mounted on the wheel axle 2 to the panel 5 of the rolling toy 1. The wheel 3 is thus mounted in rotation on the tubular portion 82 of the nut 8, interposed between the nut head 81 and the friction cheek 7. The wheel 3 has, for example, a complementary imprint to the nut head 81 formed in a flank, such as a disc-shaped imprint ([Fig.3]).
[0056] The number of turns of the screw allows the friction braking of the wheel 3 between the friction cheek 7 and the nut head 81 to be modulated. The more turns of the screw are made, the closer the wheel 3 gets to the friction cheek 7 and the more the wheel 3 is braked and vice versa.
[0057] Furthermore, by this assembly, the screw 6 does not come into contact with the wheel 3 (neither the hub nor its sides), so that tightening or loosening the screw 6 does not cause the wheel 3 to rotate, the nut 8 remaining in position due to anti-rotation elements of the wheel axle 2 as described below.
[0058] The central orifice 71 of the friction cheek 7 and the tubular portion 82 of the nut 8 have complementary anti-rotation elements assembled by the axial engagement of the tubular portion 82 of the nut 8 in the central orifice 71 of the friction cheek 7 fixed in rotation relative to the panel 5, these anti-rotation elements making it possible to immobilize the nut 8 in rotation relative to the panel 5 given that the friction cheek 7 is fixed to the panel 5.
[0059] According to one embodiment, the anti-rotation elements are formed by at least one radial tooth 73, for example parallelepiped-shaped, projecting radially, and at least one complementary notch 83. One is formed in the central orifice 71 of the friction cheek 7, the other in the tubular portion 82 of the nut 8 (Figures 5A, 5B, 6A, 6B). The one formed in the tubular portion 82 extends axially from one end of the tubular portion 82 so that the complementary anti-rotation element can engage axially by sliding along the tubular portion 82 with tightening or loosening of the screw 6.
[0060] There are at least as many complementary notches 83 as there are radial teeth 73. For example, there are two teeth 73 angularly offset by 180° from each other and two complementary notches 83.
[0061] Each radial tooth 73 is for example formed in the central orifice 71 of the friction cheek 7 and the complementary notch 83, here an axial groove, is formed on the tubular portion 82.
[0062] During assembly and disassembly of the rolling toy 1, when tightening and loosening the screw 6, the additional anti-rotation elements prevent the nut 8 from rotating relative to the friction plate 7 fixed to the panel 5 and thus hold the nut 8 in position relative to the panel 5, allowing it to be screwed and unscrewed. More specifically, the teeth 73 engage in the additional notches 83 and prevent the nut 8 from rotating relative to the friction plate 7 and therefore, relative to the panel 5.
[0063] During rolling, the wheel 3 rotates around the axle of wheel 2, while the latter is prevented from rotating relative to the panel 5 by the anti-rotation elements. The axle of wheel 2 therefore cannot tighten or loosen (depending on the direction of rotation of wheel 3). The braking of wheel 3 between the friction flange 7 and the nut head 81 is defined by the tightening of the screw 6. The friction flange 7 also acts as a spacer between wheel 3 and panel 5, preventing panel 5 from rubbing against the side of wheel 3 and wearing down, which could alter the axial length between panel 5 and wheel 3 and thus the braking conditions.
[0064] The wheel 3 is in contact with fixed elements relative to the chassis panel 5 so that the rotation of the wheel 3 has no effect on the tightening of the screw 6. The rolling of the rolling toy 1 cannot therefore cause changes in the tightening force of the screw 6 and therefore cannot cause the wheel 3 to tighten or loosen during use while offering the possibility of modulating the freedom of rolling of the wheel 3, allowing the user to block, brake or release the rolling of the toy 1.
[0065] The assembly of the anti-rotation elements by axial mechanical engagement of the tubular portion 82 of the nut 8 in the central orifice 71 of the friction cheek 7 is simple, does not require gluing means, tools or other additional fixing parts.
[0066] According to one embodiment, the nut 8 is through-bolted. In other words, the tubular portion 82 of the nut 8 protrudes from the nut head 81.
[0067] According to one embodiment, the wheel axle 2 has a trim piece 9 having a trim piece head 91 and a trim piece stem 92, the trim piece stem 92 being configured to fit into the tubular portion 82 of the nut 8 through the nut head 81 and to be removably fixed to the threaded stem 62 of the screw 6 ([Fig.3], 7A, 7B).
[0068] The hubcap head 91 is wider than the through hole of the nut 8 so that the hubcap head 91 can be held against the nut head 81. The nut head 81 presents for example a complementary imprint to the hubcap head 91 made in one face, such as a disc-shaped imprint ([Fig.6A]).
[0069] According to one embodiment, the threaded rod 62 and the trim rod 92 have complementary clipping elements, such as at least one elastic tab and at least one complementary notch, as many as elastic tabs, for clipping the trim rod 92 to the threaded rod 62.
[0070] According to one embodiment, the threaded rod 62 is hollow, the trim rod 92 fitting into the threaded rod 62 ([Fig.2B]).
[0071] According to one embodiment, the trim rod 92 and the threaded rod 62 have complementary clipping elements for clipping (or in other words, for assembling by elastic interlocking) the trim rod 92 to the threaded rod 62, and more particularly in the threaded rod 62 if the latter is hollow.
[0072] The additional clipping elements are for example made by two opposing elastic tabs 93 and two additional cavities 63. The elastic tabs 93 form for example the trim stem 92 ([Fig.7B]) and the additional cavities 63 are provided in the threaded stem 62 ([Fig.4A]).
[0073] The hubcap head 91 assembled to the threaded rod 62 forms a stop for loosening the screw 6. This loosening stop informs the user that they have sufficiently loosened the screw 6 to allow the wheel 3 to rotate freely on the wheel axle 2. The screw 6 cannot be loosened further, and consequently, it is not possible to further increase the gap between the nut head 81 and the panel 5, and therefore, the gaps between the wheel 3 and the friction flange 7 or the nut head 81 or between the screw head 61 and the panel 5. This maximum dimension of the wheel axle 2 meets a regulatory requirement to prevent finger pinching, as the gap cannot be larger than 5 mm.
[0074] The hubcap head 91 also allows the wheel axle 2 to be covered.
[0075] The rolling toy 1 thus comprises only three parts (or four parts if a hubcap 9 is present) to be assembled. These parts, the screw 6, the friction plate 7, the nut 8, and the hubcap 9, are, for example, made of plastic. They are simple to manufacture and inexpensive.
[0076] According to an example of an embodiment more clearly visible in figures 4A, 4B, 6B, the screw 6 and the nut 8 have indexing elements to index (create a hard point) at least one operating position depending on the tightening of the screw 6.
[0077] According to an example of an embodiment of these indexing elements, the thread of the threaded rod 62 of the screw 6 and the thread of the tubular portion 82 of the nut 8 have at least one indexing lug 64 and at least one additional notch 84.
[0078] For example, there are two diametrically opposed indexing lugs 64, formed in the helical branch of the net and at least as many pairs of complementary notches 84, formed in the helical rib of the net.
[0079] For example, there are more additional notches 84 than indexing lugs 64 to index several positions of use.
[0080] The indexing lugs 64 are for example formed in the thread of the threaded rod 62 of the screw 6 and the complementary notches 84 are provided in the thread of the tubular portion 82 of the nut 8.
[0081] The additional notches 84 are for example spaced at one 1 / 8th of a turn, i.e. 45°.
[0082] At least one indexed operating position may correspond to a clamping position for which the wheel 3 is likely to roll without braking (freewheeling) and / or at least one indexed operating position may correspond to a clamping position for which the wheel 3 is braked by friction while rolling and / or at least one indexed operating position may correspond to a clamping position for which the wheel 3 is blocked from rotating by friction.
[0083] Thus, for example, a first pair of notches 84 indexes the freewheel operating position. The user cannot loosen the screw 6 further because the trim ring 9 blocks the loosening stroke of the screw 6.
[0084] At least a second pair of notches 84, offset by 45° from the first pair of notches, can index a braked position of the wheel 3 (several indexed braked positions are possible). This continuous braking position can be useful, for example, to prevent the rolling toy 1 from moving too fast when the child is just beginning to walk.
[0085] A third pair of notches offset by 45° from the second pair of notches 84 can index the locked position of the wheel 3. This position indicates to the user that he does not need to tighten the screw 6 further. The indexing can be indicative, the wheel 3 can actually be locked a little before the tightening of the screw 6 reaches 45° from its previous indexed operating position.
[0086] This immobilized position can be useful, for example, to allow the child to learn to stand up or when the child wants to play with the activities offered on the rolling toy 1 without it moving.
[0087] The tightening indexing allows the user to control the tightening of the screw 6 and allows them to modify the use of the rolling toy 1 according to the needs.
[0088] When assembling a wheel 3 of the rolling object 1, the user begins by attaching the friction flange 7 to the panel 5. To do this, they push the friction flange 7 against the panel 5 in the axial direction to insert the pins 72 into the complementary holes 51 in the panel 5, thus aligning the central hole 71 with the opening 52 of the panel 5. The friction cheek 7 can thus be attached in a removable and simple manner to the panel 5 of the rolling object 1.
[0089] Then, the user inserts the tubular portion 82 of the nut through the hub of the wheel 3, the central hole 71 of the friction cheek 7 and the hole 52 of the panel 5 and screws the screw 6 into the tubular portion 82.
[0090] The user can then clip the trim ring 9 onto the nut 8 in the screw 6. The wheel 3 is thus mounted in rotation on the tubular portion 82 of the nut 8, interposed between the nut head 81 and the friction cheek 7.
[0091] The user can adjust the tightening of screw 6 to regulate the braking of wheel 3 and obtain the desired operating position.
[0092] Thus, wheel 3 can be mounted on wheel axle 2 and wheel axle 2 can be attached to the rolling toy 1 entirely by hand, without any special tools. This allows the toy 1 to be packaged disassembled, thus taking up less space. It also eliminates the need to include any special tools in the packaging for the toy 1 to assemble it. The easy-to-assemble rolling toy 1 can therefore be shipped disassembled, thereby reducing the packaging volume.
[0093] The indexed operating positions also allow all the wheels 3 of the rolling object 1 to be mounted with the same tightening when there are several of them.
[0094] Fig. 8 shows another example of implementation.
[0095] In this embodiment, the orifice 52 of the panel 5 and the tubular portion 82 of the nut 8 have complementary anti-rotation elements assembled by the axial engagement of the tubular portion 82 in the orifice 52 of the panel 5 to immobilize the nut 8 in rotation relative to the panel 5.
[0096] The anti-rotation elements can be formed by complementary non-circular assembly shapes of the opening 52 of the panel 5 and the tubular portion 82 of the nut 8. The tubular portion 82 of the nut 8 thus has, on the one hand, a cylindrical part adjoining the nut head 81 around which the wheel 3 can rotate, and on the other hand, an end part having non-circular assembly shapes. The opening 52 of the panel 5 and the end part of the tubular portion 82 of the nut 8 have, for example, respective polygonal cross-sections or cross-sections inscribed within a polygonal shape (here with rounded corners).
[0097] According to one embodiment, the central orifice 71 of the friction cheek 7 can also have a complementary non-circular assembly shape in order to be fixed in rotation relative to the panel 5. More specifically, the central orifice 71 of the friction cheek 7 can have a non-circular section complementary to the end part of the tubular portion 82 of the nut 8 ([Fig.8]).
[0098] During assembly and disassembly, the anti-rotation elements keep the nut 8 in position relative to the panel 5. The friction cheek 7 is fixed relative to the panel 5, which prevents it from wearing down the panel 5 by rotating with the wheel 3.
[0099] The other features of this embodiment are similar to the embodiments previously described.
Claims
Demands
1. A wheel axle (2) configured to be assembled to a panel (5) of a rolling toy (1), such as a walker or a portable toy, characterized in that the wheel axle (2) comprises: - a screw (6) having a screw head (61) mounted on a threaded rod (62), - a friction flange (7) configured to be interposed between the panel (5) and a wheel (3) of the rolling toy (1) while being fixed against rotation relative to the panel (5), the friction flange (7) having a central orifice (71), - a nut (8) having a nut head (81) mounted on a threaded tubular portion (82) intended to pass through a hub of the wheel (3), the central orifice (71) of the friction flange (7) and an orifice (52) of the panel (5), the threaded rod (62) of the screw (6) being configured to be screwed into the tubular portion (82) of the nut (8) for fixing the wheel (3) mounted on the wheel axle (2) to the panel (5) of the rolling toy (1),the number of screw turns modulating the friction braking of the wheel (3), the central orifice (71) of the friction cheek (7) or the orifice (52) of the panel (5) and the tubular portion (82) of the nut (8) having complementary anti-rotation elements assembled by the axial engagement of the tubular portion (82) of the nut (8) in the central orifice (71) of the friction cheek (7) or in the orifice (52) of the panel (5), these anti-rotation elements making it possible to immobilize the nut (8) against rotation relative to the panel (5).
2. Wheel axle (2) according to claim 1, characterized in that the friction cheek (7) is configured to be removably fixed to the panel (5) of the rolling toy (1).
3. Wheel axle (2) according to the preceding claim, characterized in that the friction cheek (7) and the panel (5) have at least one stud (72) and at least one additional hole (51), one formed in the friction cheek (7), the other in the panel (5).
4. Wheel axle (2) according to any one of claims 1 to 3, characterized in that the anti-rotation elements are formed by at least one radial tooth (73) and at least one complementary notch (83), the anti-rotation element formed in the tubular portion (82) extending in an axial direction from one end of the tubular portion (82) so that the additional anti-rotation element can engage axially with the anti-rotation element by sliding along the tubular portion (82) with tightening or loosening of the screw (6).
5. Wheel axle (2) according to any one of claims 1 to 3, characterized in that the anti-rotation elements are formed by complementary non-circular assembly forms of the orifice (52) of the panel (5) and the tubular portion (82) of the nut (8).
6. Wheel axle (2) according to any one of the preceding claims, characterized in that the screw head (61) forms a handle allowing manual tightening of the screw (6).
7. Wheel axle (2) according to any one of the preceding claims, characterized in that the nut (8) is through, the wheel axle (2) comprising a trim (9) having a trim head (91) and a trim stem (92), the trim stem (92) being configured to fit into the tubular portion (82) of the nut (8) through the nut head (81) to be removably fixed to the threaded stem (62) of the screw (6), the trim head (91) assembled to the threaded stem (62) forming a stop for loosening the screw (6).
8. Wheel axle (2) according to the preceding claim, characterized in that the threaded shank (62) of the screw (6) is hollow, the trim shank (92) fits into the threaded shank (62), the trim shank (92) and the threaded shank (62) having complementary clipping elements for clipping the trim shank (92) into the threaded shank (62).
9. Wheel axle (2) according to any one of the preceding claims, characterized in that the thread of the threaded rod (62) and the thread of the tubular portion (82) of the nut (8) have at least one indexing lug (64) and an additional notch (84) for indexing at least one operating position depending on the tightening of the screw (6).
10. Wheel axle (2) according to the preceding claim, characterized in that at least two diametrically opposed indexing lugs (64) are provided in the helical groove of the thread and at least two complementary notches (84) are provided in the helical rib of the thread.
11. A wheeled toy (1) comprising at least one wheel (3), such as a walker or a portable toy, characterized in that it comprises at least one wheel axle (2) according to any one of the preceding claims, which can be removably attached to a panel (5) of the toy rolling (1) and on which a wheel (3) of the rolling toy (1) can be mounted to rotate.
12. Rolling toy (1) according to the preceding claim with a wheel axle (2) according to one of claims 9 or 10, characterized in that at least one indexed operating position corresponds to a clamping for which the wheel (3) is capable of rolling without braking and / or at least one indexed operating position corresponds to a clamping for which the wheel (3) is braked by friction while rolling and / or at least one indexed operating position corresponds to a clamping for which the wheel (3) is blocked from rotating by friction.