Scooter with retractable front and rear wheels

Abstract

Scooter (1) comprising: a platform (10); a front axle (20) comprising a first plate (21) slidably mounted on a front portion of the platform, a steering tube (22) connected to the first plate via an articulated arm pivotally mounted on said first plate, and a fork (24) pivotally mounted in the torsion tube and carrying a front wheel (25); a rear axle (30) comprising a second plate (31) slidably mounted on a rear portion of the platform and carrying a rear wheel (32); a simultaneous retraction device (50) for the front and rear axles; and a mechanical linkage (60) between the arm and the platform, arranged to control the retraction device. FIGURE IN ABRIDGED DIAGRAM: Fig. 1A

Description

Title of the invention: Scooter with retractable front and rear wheels

[0001] The present invention relates to the field of wheeled vehicles and more particularly to a scooter with retractable front and rear wheels.

[0002] BACKGROUND OF THE INVENTION

[0003] A scooter is a wheeled vehicle belonging to the category of PEDs (Personal Mobility Devices) and generally includes: • a platform on which a user can position themselves to move around, the platform being wide enough to allow the user to position at least one foot on it; • a pivoting steering column mounted in a sleeve at the front of the platform to allow the user to steer and stabilize the scooter, the steering column having a lower end with a first wheel and an upper end with handlebars; and • a second wheel mounted at the rear of the platform.

[0004] Scooters with a hinge between the steering column housing and the platform are known to fold the steering column down onto the platform. This results in a foldable scooter that is easier to transport and store. Folding the steering column down onto the platform reduces the scooter's overall size, particularly its height.

[0005] However, when the steering column is folded down onto the platform, the front wheel is brought in front of the front end of the platform, so that this type of articulation does not reduce the scooter's wheelbase; on the contrary, it increases it. As a result, after folding, the scooter remains quite bulky, particularly in length.

[0006] Therefore, storing such a scooter in a given volume such as a vehicle trunk, a suitcase or a backpack, can prove complicated or even impossible.

[0007] It may also prove difficult for the user to use public transport (metro, bus, tram...) with such a folded scooter without inconveniencing other passengers, especially during peak hours.

[0008] In addition, after folding, it is generally necessary to carry the scooter by hand to move around, which is made difficult by its significant bulk.

[0009] SUBJECT OF THE INVENTION

[0010] The invention therefore aims to provide a scooter that makes it possible to overcome, at least in part, the aforementioned disadvantages. Summary of the invention

[0011] To this end, the invention proposes a scooter comprising: • a platform which extends along a longitudinal axis (X) defining a direction of forward movement of the scooter and which is arranged so that a user can position at least one foot on it to move; • a front axle which includes a first plate mounted sliding on a front part of the platform along the longitudinal axis of said platform between an extended position and a retracted position, a steering tube connected to the first plate via an articulated arm mounted pivoting along an axis substantially orthogonal to the longitudinal axis on said first plate between a position of use and a storage position, and a fork mounted pivoting in the torsion tube and carrying a front wheel; • a rear which includes a second plate mounted sliding on a rear part of the platform along the longitudinal axis of said platform between an extended position and a retracted position, the second plate (31) carrying a rear wheel; • a device for the simultaneous retraction of the front and rear axles arranged so that the sliding of the second plate is linked to the sliding of the first plate and that the extended and retracted positions of said second plate correspond respectively to the extended and retracted positions of said first plate; and • a mechanical link between the arm and the platform, arranged so that the pivoting of the arm is linked to the sliding of the first turntable and that the positions of use and storage of said arm correspond respectively to the extended and retracted positions of said first turntable.

[0012] The retractable mechanism reduces the distance between the front and rear wheels, thus decreasing the scooter's overall size. The mechanical linkage connects the retraction of the front and rear wheels to the folding of the fork onto the platform, thereby facilitating the folding of the scooter.

[0013] According to a particular feature of the invention, the sliding of the first plate and the sliding of the second plate are antagonistic.

[0014] According to another particular feature of the invention, the retraction device comprises: • a first toothed rail fixed to the first plate of the front axle and extending parallel to the longitudinal axis; • a second toothed rail fixed to the second plate and extending parallel to the longitudinal axis; and • a first gear mounted to rotate freely on the platform around an axis perpendicular to the longitudinal axis, and meshing with the first rail and the second rail.

[0015] In particular, the gear wheel comprises a first set of teeth meshing with the first rail and a second set of teeth meshing with the second rail.

[0016] According to another particular feature of the invention, the mechanical linkage comprises: • a second toothed wheel fixed to the arm and having a central axis coinciding with the pivot axis of said arm; and • a rack fixed to the platform along the longitudinal axis to mesh with the second toothed wheel.

[0017] According to another particular feature of the invention, the scooter includes a fork having an upper end received pivotally in the steering tube, and a lower end carrying the front wheel.

[0018] According to another particular feature of the invention, the scooter includes a steering column mounted articulated on the upper end of the fork along an articulation axis.

[0019] In particular, the steering unit includes a handlebar mounted to slide in the steering column and equipped with grips.

[0020] In particular, the handles are foldable along the steering column.

[0021] According to another particular feature of the invention, the retraction device is motorized via a motorization system extending inside a box arranged under the platform. Brief description of the drawings

[0022] The invention will be better understood in the light of the following description, which is purely illustrative and not limiting, and should be read in conjunction with the accompanying drawings, among which:

[0023] [Fig.1A] [Fig.1A] is a perspective view of a scooter according to a particular embodiment of the invention, in which the scooter is unfolded;

[0024] [Fig.1B] [Fig.1B] is a view identical to [Fig.1A], in which the scooter is folded;

[0025] [Fig.2] [Fig.2] is a perspective view of the scooter chassis in [Fig.1A];

[0026] [Fig.3A] [Fig.3A] is a perspective view of various elements constituting the scooter illustrated in [Fig.1A], before folding;

[0027] [Fig.3B] [Fig.3B] is an identical view to [Fig.3A], after folding;

[0028] [Fig.4A] [Fig.4A] is a perspective view of the retraction device for the front and rear axles of the scooter illustrated in [Fig.1A], as well as the mechanical linkage for activating this retraction device, before folding;

[0029] [Fig.4B] [Fig.4B] is an identical view to [Fig.4A], after folding. DETAILED DESCRIPTION OF THE INVENTION

[0030] With reference to [Fig. 1A], a folding scooter generally designated in 1 comprises, according to a particular embodiment of the invention: • a chassis 10 which extends along a longitudinal X axis and which is arranged so that a user can position at least one foot to move around; • a retractable front axle 20 which is connected to a front part of the chassis 10; • a retractable rear axle 30 which is connected to a rear part of the chassis 10; and • a foldable steering unit 40 which extends globally along an axis Z40 and which is connected to the front axle 20 to allow the user to guide and stabilize the scooter 1.

[0031] The notions "front" and "rear" are defined, here and in the rest of the description, with respect to a direction of advancement A of the scooter 1 according to a nominal mode of use in which the longitudinal axis X of the chassis 10 is aligned with the direction of advancement A, the steering member 40 being at the front.

[0032] With reference to [Fig.2], the chassis 10 includes a platform 11, generally parallelepiped in shape, under which is arranged a box 12 extending over substantially the entire length of the platform 11.

[0033] Platform 11 extends along the X-axis and comprises: • a first groove 11.1 in a T-shape which extends along the X axis and which opens onto a front face 1 la, a rear face 11b and a top face 1 le of the platform 11; • a second groove 11.2 in a T-shape which extends along the X axis and opens onto the front face 1 la, the rear face 11b and a lower face 1 Id of the platform 11; • a third T-shaped groove 11.3 extending along the X-axis and opening onto the rear face 11b of the platform 11 and into the second groove 11.2; and • a notch 11.4 for retracting the rear axle 30, which extends along the X axis and opens onto the rear face 11b, the upper face 11 and the lower face 11d of the platform 11, and which connects the first, second and third grooves 11.1, 11.2, 11.3.

[0034] The upper face 1 of the platform 11 is the face of the chassis 10 on which the user can position their feet to move. The lower face 1 of the platform 11 is the face of the chassis 10 from which the box 12 extends.

[0035] The box 12 extends along the X axis, projecting from the lower face 1 of the platform 11, and has a notch 12.1 which extends, in a direction perpendicular to the X axis, in line with the notch 11.4 of the body 11 to receive, as will be seen later, the rear axle 30. The box 12 is fixed with respect to the platform 11 and has two lateral fins 12.1 received in the second groove 11.2 of the platform 11.

[0036] The platform 11 and the box 12 are, for example, cast parts or an assembly of welded sheets, and are preferably made of a resistant and lightweight material (stainless steel, aluminum, titanium...).

[0037] The chassis 10 also includes a hinged flap 13 (visible in [Fig. 1A] and 3A) arranged to selectively define, with the upper face 1 of the platform 11, a user foot positioning area and to allow, as will be seen later, retraction of the front axle 20 and the rear axle 30 into the chassis 10. The flap 13 has a panel 13.1 mounted for rotation on the platform 11 about an axis substantially parallel to the X-axis by means of a hinge 13.2, between an open position in which the panel 13 extends substantially orthogonally to the upper face 1 of the platform 11 ([Fig. 3A]), and a closed position in which the panel 13.1 extends into the first groove 11.1, an outer face 13a of the panel 13.1 extending substantially in line with the upper face 11c of platform 11 to define the user's foot positioning zone ([Fig.1A]). Hinge 13.2 extends close to a lateral edge of platform 11.

[0038] With reference to [Fig. 1 A], the front axle 20 comprises: • a first plate 21 arranged to slide in the first groove 11.1 in the T of the platform 11 along the X axis; • a steering tube 22 connected to the first plate 21 via a connecting arm 23; and • a fork 24 having an upper end pivotally received in the steering tube 22, and a lower end carrying a front wheel 25.

[0039] With reference to Figures 4A and 4B, the first plate 21 has a cross-section, along a plane perpendicular to the X-axis, substantially in the shape of an inverted T, and comprises a base 21a which extends substantially horizontally and is connected to a hollow body 21b extending substantially vertically. The base 21a and the body 21b extend respectively inside and outside the first groove 11.1 of the platform 11. The base 21a is arranged to cooperate with said first groove 11.1 so as to form a sliding connection and allow the front axle 20 to slide, along the X axis, in the chassis 10 there is an extended position in which the base 21a is close to the front face 1 of the platform 11 (figures IA, 3A and 4A), and a retracted position in which said base 21a is away from said front face lia (figures IB, 3B and 4B).

[0040] It will be noted that in the closed position, the panel 13.1 of the flap 13 extends in line with the base 21a of the first plate 21 and forms an obstacle to the sliding of the front axle 20 which cannot then leave its extended position to return to its retracted position.

[0041] The steering tube 22 includes a hollow cylinder which extends along an axis Z22 substantially coincident with the axis Z.

[0042] The arm 23 extends along an axis Z23 and comprises: • a lower end articulated on the body 21b of the first plate 21 along an axis Y23a of articulation substantially orthogonal to the X and Z axes, between a first position called the operating position in which the arm 23 is away from the platform 11 (Figures 1A, 3A), and a second position called the storage position in which the arm 23 is folded down onto the platform 11 (Figures 1B, 3B); and • an upper end articulated on the steering tube 22 along an axis Y23b of articulation substantially orthogonal to the X axis and the Z axis, between a first position in which the steering tube 22 is away from the arm 23 (figures IA, 3A), and a second position in which the steering tube 22 is folded down onto the arm 23 (figures IB, 3B).

[0043] First locking means (not shown) allow the arm 23 to be held in the first position and in the second position.

[0044] Similarly, second locking means (not shown) allow the steering tube 22 to be held in the first position and in the second position.

[0045] The fork 24 extends along an axis Z24 substantially coinciding with the Z-axis and comprises a stem 24.1, two fork legs 24.2, and a triple clamp 24.3 connecting the stem 24.1 to the two fork legs 24.2. The stem 24.1 is pivotally received in the steering tube 22, for example by means of suitable ball bearings, and has an upper end that projects from said steering tube 22. The fork legs 24.2 have a lower end at which the front wheel 25 is mounted to rotate about an axis of rotation Y25 substantially orthogonal to the Z-axis. In a manner known per se, the front wheel 25 is equipped with a mudguard 26 fixed to the triple clamp 24.3 of the fork 24 such that said mudguard 26 is fixed relative to said fork 24.

[0046] The steering element 40 comprises a steering column 41 which extends globally along an axis Z4 and which includes: • a lower end articulated to the upper end of the fork stem 24.1 along an axis Y4[ substantially parallel to the axis Y25 of rotation of the front wheel 25, between a first position called unfolded in which the axis Z4i of the steering column 41 is substantially coincident with the axis Z24 of the fork 24, and a second position called folded in which the steering column 41 is folded down onto the fork 24 and extends substantially parallel to it; and • an upper end from which extends a retractable handlebar 42 arranged to slide in the steering column 41 along an axis Z42 substantially coincident with the axis Z4i between a first extreme position called high in which a small part of the handlebar 42 has entered the steering column 41, and a second extreme position called low in which a large part of said handlebar 42 has entered said steering column 41.

[0047] The steering column 41 and the handlebar 42 are said to be telescopic.

[0048] Third locking means (not shown) allow the handlebar 42 to be held in the low position and in the high position, and also in a plurality of intermediate positions arranged between the low position and the high position.

[0049] The handlebar 42 is equipped with two handles 43, substantially straight and identical, extending along an axis Y23. The handles 43 are arranged on either side of the handlebar 42 and each has an end articulated on said handlebar 42 along an axis X43 substantially perpendicular to the axis Z4i of the steering column 41 and to the axis Y25 of rotation of the front wheel 25, between a deployed position in which the longitudinal axis Y43 of the handles 43 is substantially perpendicular to the axis Z4i of the steering column 41 and substantially parallel to the axis Y25 of rotation of the front wheel 25 ([Fig.1A]), and a folded-down position in which said axis Y43 is substantially parallel to the axis Z4i and perpendicular to the axis Y25 ([Fig.1B]).

[0050] Fourth locking means 44 allow the handles 43 to be held in the deployed position and in the folded position.

[0051] It will be noted that the steering tube 22, the arm 23, the fork 24 and the steering member 40 extend in the same plane XZ40 defined by the axis X and the axis Z40, and that the steering member 40 extends in a plane perpendicular to the axis XZ and passing through the axis Z.

[0052] The rear axle 30 comprises a second plate 31 which extends substantially horizontally along the X axis and which has in its rear part two arms between in which a rear wheel 32 is mounted to rotate about an axis of rotation Y32 substantially perpendicular to the X and Z axes. The second plate 31 also has first lateral fins 31.1 and second fins 31.2 arranged to cooperate respectively with the first groove 11.1 and the third groove 11.3 in the T-shape of the platform 11 so as to form a sliding connection and allow the second plate 31 to slide along the X axis, between an extended position in which the rear wheel 32 extends outside the chassis 10 and is said to be "deployed" (Figures IA, 3A), and a retracted position in which the second wheel 32 extends inside the chassis 10 and is said to be "retracted" (Figures IB, 3B).

[0053] It will be noted that in the closed position, the panel 13.1 of the flap 13 extends in line with the second plate 31 and forms an obstacle to the sliding of the rear axle 30 which cannot then leave its extended position to return to its retracted position.

[0054] The rear wheel 32 is equipped with a mudguard 33 fixed to the second plate 31 so that said mudguard 33 is fixed with respect to said second plate 31.

[0055] According to the invention, the scooter 1 also includes a simultaneous retraction device 50 of the front axle 20 and the rear axle 30 in the chassis 10.

[0056] With reference to Figures 4A and 4B, the retraction device 50 is mechanical and comprises: • a first toothed rail 51 fixed to the first plate 21 of the front axle 20 and extending parallel to the axis X, so that any sliding of the first plate 21 along the axis X causes a sliding of the first rail 53 along said axis X; • a second toothed rail 52 fixed to the second plate 31 of the rear axle 30 and extending parallel to the X axis, such that any sliding of the second plate 31 along the X axis causes the second rail 52 to slide along said X axis; and • a first toothed wheel 53 mounted movable in rotation on the platform 11 around an axis perpendicular to the axis X, and comprising a first toothing 53.1 which meshes with the first rail 51 and a second toothing 53.2 which meshes with the second rail 52, so that any sliding of the first plate 21 along the axis X causes a sliding of the second plate 31 along the axis X in a direction opposite to that of the sliding of said first plate 21.

[0057] The first gear 53 is thus a double gear, and it is understood that the sliding of the first plate 21 and the sliding of the second plate 31 are antagonistic, and that the sliding of the rear axle 30 along the X axis is linked to the sliding of the front axle 20 along said X axis. The first rail 51, the second rail 52, and the first gear 53 are arranged so that the passage of the axle The movement of the front axle 20 from the extended position to the retracted position causes the rear axle 30 to move from the extended position to the retracted position, and conversely, the movement of the front axle 20 from the retracted position to the extended position causes the rear axle 30 to move from the retracted position to the extended position: the retraction and deployment of the front axle 20 respectively causes the retraction and deployment of the rear axle 30.

[0058] It will be noted that the first tooth 53.1 and the second tooth 53.1 of the first toothed wheel 53 have different diameters here to compensate for unequal sliding strokes of the front axle 20 and the rear axle 30.

[0059] The scooter 1 further includes a mechanical linkage 60 between the arm 23 and the platform 11, arranged to link the rotation of the arm around its lower articulation axis Y23a to the retraction and deployment of the front and rear axles 20, 30 via the retraction device 50.

[0060] The mechanical linkage 60 comprises: • a second gear 61 fixed to the lower end of the arm 23 and extending inside the body 21b of the first plate 21 in the XZ4o plane, the second gear 61 having a central axis Y6i coinciding with the lower articulation axis Y23a of the arm 23, so that any rotation of the arm 23 around the axis Y23a causes a rotation of the second gear 61 around its axis Y51; and • a rack 62 fixed to the platform 11 and extending along the X axis, the rack 62 being provided with teeth meshing with the second toothed wheel 61 so that any rotation of said second toothed wheel 61 around its central axis Y54 causes the first plate 21 of the front axle 20 to slide along the X axis.

[0061] The sliding of the front axle 20 along the X-axis is thus linked to the rotation of the arm 23 around the Y23a axis, the second toothed wheel 61 and the rack 62 being arranged such that the movement of said arm 23 from the first position to the second position causes the front axle 20 to move from the extended position to the retracted position, and conversely, so that the movement of said arm 23 from the second position to the first position causes the front axle 20 to move from the retracted position to the extended position. It is understood that the rotation of the arm 23 towards the rear wheel 30 and towards the front wheel 20 causes the retraction and extension of the front axle 20 to occur respectively, and therefore also the retraction and extension of the rear axle 30.

[0062] It should be noted that the body 21b of the first plate 21 is equipped with a cover 21c to protect the second gear 61. The cover 21c is hinged to the body 21b along an axis Y2k substantially parallel to the axis Y6i of the second gear 61, between an open position in which the second gear 61 is visible by the user when the arm 23 is in its first position (figures IB, 3A, 3B, 4B), and a closed position in which the second toothed wheel 61 is hidden by the cover 21c when said arm 23 is in its first position and in which said cover 21c forms an obstacle to the rotation of said arm 23 which cannot then leave its first position to join its second position (figure IA, 4A).

[0063] Fifth locking means (not shown) allow the cover 21c to be held in the open and closed positions.

[0064] In the rest of the description: • the length of scooter 1 corresponds to its length along the X axis; • The width of the scooter 1 corresponds to its dimensions along a Y-axis parallel to the Y32 axis of rotation of the rear wheel 32 and to the Y23a, Y23b axes of articulation of the arm 23; and • the height of scooter 1 corresponds to its height along a Z axis orthogonal to the X, Y axes.

[0065] In service, in other words when the scooter 1 is in the unfolded state: • The overall length of scooter 1 is defined by the front and rear wheels 25, 32 and is here approximately equal to 950 millimeters; • The width of the scooter 1 is defined by the handles 43 and is approximately 670 millimeters; and • The height of the scooter 1 is defined by the first and second wheels 25, 32 and the handles 43, and is here approximately equal to 990 millimeters.

[0066] The folding of scooter 1 will now be detailed.

[0067] During a first step 101, the handlebar 42 was inserted into the steering column 41 until it reaches its lower position so as to reduce the bulk of the steering component 40.

[0068] In a second step 102, the handles 43 are folded down along the steering column 41 until it reaches their folded position so as to reduce the bulk of the steering component 40 a second time.

[0069] In a third step 103, the steering column 41 is folded down along the fork stem 24.1 24 so as to reduce the overall size of the steering member 40 a third time.

[0070] During a fourth step 104, the steering column 41 is made to pivot around its axis Z4[ so that the axis Y25 of rotation of the front wheel 25 is in the plane XZ40.

[0071] During a fifth step 105, the steering tube 22 is made to pivot around the articulation axis Y23b to move from the first position to the second position.

[0072] During a sixth step 106, the flap 13 is made to pivot around its articulation axis XM to move from the closed position to the open position so as to allow the sliding of the front axle 20 and the axle 30.

[0073] During a seventh step 107, the cover 21c equipping the body 21b of the front landing gear 20 is made to pivot around its axis X2ic of articulation to move from the closed position to the open position so as to allow the arm 23 to be folded down along the platform 11.

[0074] During an eighth step 108, the arm 23 is made to pivot around its articulation axis Y23a to move from the first position to the second position, which results in a reduction in the height of the scooter 1 but also a simultaneous retraction of the front and rear axles 20, 30 resulting in a reduction in the length of the scooter 1.

[0075] The retraction of the front and rear axles 20, 30 is such that the length of the scooter 1 is now substantially defined by the chassis 10 and corresponds to the distance separating the front face 1la and the rear face 11b from the platform 11.

[0076] In the folded state: • the overall length of scooter 1 is here approximately equal to 500 millimeters; • The width of scooter 1 is approximately 250 millimeters; and • The height of scooter 1 is approximately 350 millimeters.

[0077] Thus, folding the scooter 1 makes it possible to greatly reduce the overall size of the scooter 1, and in particular its length, so that the scooter 1 can be inserted into a shoulder bag, a backpack, a cabin suitcase...

[0078] It is also understood that the retraction device 50 and the mechanical link 60 make it easier to fold the scooter 1 but also to reduce the time required to fold it.

[0079] To unfold scooter 1, simply perform the different steps in reverse order.

[0080] Of course, the invention is not limited to the embodiment described but encompasses any variant falling within the scope of the invention as defined by the claims.

[0081] Herein, "scooter" means any means of locomotion comprising a platform which is mounted on at least two wheels and which is equipped with a steering column, a user being able to stand on the platform.

[0082] Herein, "train" means any support for at least one wheel.

[0083] Although the platform 10 here comprises only one hinged panel 13, it can also to include two or more. The two panels will for example each be mounted to rotate around an axis and together will have an overlap area equivalent to that of panel 13.

[0084] Although the sliding of the front and rear axles 20, 30 is here ensured by the first, second and third grooves 11.1, 11.2, 11.3 in T-shape, it can be ensured by any structure forming a sliding connection (straight groove, dovetail groove, rails...)

[0085] Although the handles 43 are here foldable, they can be removed.

[0086] In the case where the sliding strokes of the front axle 20 and the rear axle 30 are identical, the first toothed wheel 53 may include a single tooth meshing with the first rail 51 and the second rail 52.

[0087] Although the opening and closing of panel 13 and cover 21c are manual here, they can be motorized.

[0088] Although the movement of the arm 23 and the steering tube 22 from the first position to the second position is manual here, it can be motorized.

[0089] The movement of arm 23 from the first position to the second position and the retraction of the front and rear axles 20, 30

[0090] Although the steering element (40) is here foldable, it can be detached.

[0091] Although the Y4i articulation axis of the steering column is here parallel to the axis Y25 of rotation of the front wheel 25, it can be orthogonal to said Y25 axis of rotation.

[0092] The scooter 1 can be equipped with a motorization system housed for example in the casing 12 to drive the first toothed wheel 53 in rotation and thus simultaneously cause the arm 23 to fold down along the chassis 10 and the front and rear axles 2, 30 to retract.

[0093] The scooter 1 may be motorized and include, in particular, an electric motor arranged to rotate the front wheel 25 or the rear wheel 32, and a battery-type power source arranged to supply the motor via a microcontroller. The motor will, for example, be integrated into the front wheel 25 or the rear wheel 32, and the battery and microcontroller will, for example, be housed in a cavity provided in the chassis housing 12. A charger capable of recharging the battery when connected to the mains power supply may also be integrated into said housing 12.

[0094] The scooter 1 can be equipped with a front shock absorber (for example integrated into the fork 24) and / or a rear shock absorber.

[0095] The housing 12 can be removable.

[0096] The scooter 1 can be equipped with a braking device for the front wheel 25 and / or the rear wheel 32 (magnetic brake, friction brake...).

[0097] Scooter 1 can be equipped with a control screen.

Claims

Demands

1. Scooter (1) comprising: • a platform (10) extending along a longitudinal axis (X) defining a direction of forward movement (A) of the scooter and arranged so that a user can position at least one foot on it to move; • a front assembly (20) comprising a first plate (21) mounted to slide on a front part of the platform along the longitudinal axis of said platform between an extended position and a retracted position, a steering tube (22) connected to the first plate via an articulated arm mounted to pivot about an axis (Y23a) substantially orthogonal to the longitudinal axis (X) on said first plate between a use position and a storage position, and a fork (24) mounted to pivot in the torsion tube and carrying a front wheel (25);• a rear axle (30) comprising a second plate (31) mounted to slide on a rear portion of the platform along the longitudinal axis of said platform between an extended position and a retracted position, the second plate carrying a rear wheel (32); • a simultaneous retraction device (50) for the front and rear axles arranged so that the sliding of the second plate is linked to the sliding of the first plate and that the extended and retracted positions of said second plate correspond respectively to the extended and retracted positions of said first plate; and • a mechanical linkage (60) between the arm and the platform, arranged so that the pivoting of the arm is linked to the sliding of the first plate and that the operating and storage positions of said arm correspond respectively to the extended and retracted positions of said first plate.

2. Scooter (1) according to claim 1, wherein the sliding of the first plate (21) and the sliding of the second plate (31) are antagonistic.

3. Scooter (1) according to any one of the preceding claims, wherein the retraction device (50) comprises: • a first toothed rail (51) fixed to the first plate (21) of the front axle (20) and extending parallel to the longitudinal axis (X); • a second toothed rail (52) fixed to the second plate (31) and extending parallel to the longitudinal axis (X); and • a first toothed wheel (53) mounted movably for rotation on the platform (11) about an axis perpendicular to the longitudinal axis (X), and meshing with the first rail and the second rail.

4. Scooter (1) according to claim 3, wherein the toothed wheel (53) comprises a first toothing (53.1) engaging with the first rail and a second toothing (53.2) engaging with the second rail (52).

5. Scooter (1) according to any one of the preceding claims, wherein the mechanical linkage comprises: • a second toothed wheel (61) fixed to the arm (23) and having a central axis (Y6i) coinciding with the pivot axis (Y23a) of said arm; and • a rack (62) fixed to the platform (11) along the longitudinal axis to mesh with the second toothed wheel (61).

6. Scooter (1) according to any one of the preceding claims, comprising a fork (24) having an upper end received pivotally in the steering tube (22), and a lower end carrying the front wheel (25).

7. Scooter (1) according to the preceding claim, comprising a steering member (40) having a steering column (41) mounted articulated on the upper end of the fork (24) along an articulation axis (Y4i).

8. Scooter (1) according to the preceding claim, wherein the steering member (40) comprises a handlebar (42) mounted to slide in the steering column (41) and equipped with grips (43).

9. Scooter (1) according to the preceding claim, wherein the handles (43) are foldable along the steering column (41). 16

10. Scooter (1) according to any one of the preceding claims, wherein the retraction device (50) is motorized via a motorization system extending inside a box (12) disposed under the platform (11).

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