阅读说明：本技术 用于驱动一对滑雪板或冲浪板的装置 (Device for driving a pair of skis or surfboards ) 是由 阿尔诺·巴鲁 于 2019-03-09 设计创作，主要内容包括：本发明涉及一种允许控制一对滑雪板或冲浪板的装置,特别是用于雪地的装置,该装置通过比如手把之类的单个驱动构件的简单旋转和简单倾斜的组合,同时通过横向倾斜和纵向翘曲来控制。因此,它将一对传统紧固件的必要机械功能和自行车的易用性相结合,并且不需要特定的滑雪板或特定的冲浪板。通过用保持不动但不锁定的双脚来驱动,或者通过用一只脚在平地上推动并保持稳定,它可以让你在雪地上自由运动。最后,它可以快速折叠起来,便于搬运和存放。(The present invention relates to a device allowing the control of a pair of skis or surfboards, in particular for snow, by a combination of simple rotation and simple tilting of a single driving member, such as a handlebar, simultaneously controlled by transverse tilting and longitudinal warping. Thus, it combines the necessary mechanical functions of a pair of conventional fasteners with the ease of use of the bicycle and does not require a special snowboard or a special surfboard. It allows you to move freely on snow, either by driving with both feet, which remain stationary but not locked, or by pushing on flat ground with one foot and keeping stable. Finally, it can be folded quickly for easy transport and storage.)

1. A drive arrangement for driving a pair of skis (1), comprising:

-a first zone (z) for fixing feet, substantially located on a first half of the pair of snowboards, the perpendicular to the pair of snowboards (1) and the first axis (a) forming a first plane (P) with a first axis at said first zone (z), said first axis passing longitudinally through the pair of snowboards at the centre of gravity thereof; and

-a second zone (z ') for fixing feet, substantially located on the second half of the pair of skis, the perpendicular to the pair of skis (1) and said first axis forming a second plane (P ') with the first axis at said second zone (z '),

the device comprises:

-a first connection element (4) connected to the pair of snowboards (1) at a first end (15) through a first base (2) at said first zone (z) and constrained at least parallel to said first plane (P) at a first point (o') at a second end (17);

-a second connection element (3) connected to the pair of snowboards (1) at a third end (12) through a second base (2') at said second zone (z ') and constrained at least parallel to said second plane (P ') at a second point (o) at a fourth end (14);

-a buckling element (5) connected to said first connection element (4) at least at a first point (o '), connected to said second connection element (3) at least at a second point (o), and maintaining a fixed predetermined distance between the first and second points (o', o), the free movement of said buckling element (5) offsetting said second point (o) with respect to said first plane (P) and said first point (o ') with respect to said second plane (P').

2. The drive device according to claim 1, wherein the warp element (5) is pivotally connected to the second connecting element (3) about a second axis (E) containing the second point (o) and is freely pivotable about the second axis (E) according to an angular sector of at least 2 °.

3. The drive device according to claim 2, wherein the warp element (5) is pivotally connected to the first connection element (4) about a third axis of rotation (D) containing the first point (o'), the second axis (E) and the third axis (D) having an angle (g) of at least 2 ° therebetween.

4. A drive device according to claim 3, wherein the second connecting element (3) is pivotally fixed to the first base (2) about a fourth axis (C), and wherein the buckling element (5) comprises a grip member (25), the first point (o') being located between the grip member and the second point (o), the grip member defining a fifth axis (F) passing through a centre of gravity (k) of the grip member and an intersection point (x) between the second axis (E) and the fourth axis (C).

5. The drive device according to claim 4, wherein the first and second points (o', o) are arranged on both sides of the fifth axis (F).

6. The drive device according to claim 4, wherein said first point (o') coincides on said fifth axis (F).

7. The drive device according to any one of the preceding claims, comprising a retaining element (6) connecting the first connecting element (4) with the warp element (5) and made removable from at least the second connecting element (4) or the warp element (5).

8. The drive device according to any one of the preceding claims, wherein the first connection element (4) is not rectilinear.

9. The drive arrangement according to any one of the preceding claims, wherein the first connecting member (4) is pivotally connected to the pair of skis (1) about a sixth axis (B).

Technical Field

The present application relates to a device for driving a pair of skis or surfboards, in particular for snow.

Background

It is well known that a rider achieves many forms of control on a snowboard or surfboard without having to lock the feet to the supports.

One known device consists in using the principle of a bicycle, by fastening a first surfboard, which is rigid and of significantly reduced dimensions, to a fixed rear part of a frame, the front part of which is equipped with a steering column mounted on the handlebar. The lower end of the steering member is equipped with a second plate, the size of which is generally smaller than the size of the first surfboard fastened to the rear. It is known that such a device does not truly reproduce the dynamic behaviour of a bicycle or a snowboard, and its bulk is a major drawback. Furthermore, it cannot reproduce the twist normally imposed on surfboards or snowboards.

Disclosure of Invention

The object of the present invention is to provide a device for controlling a pair of skis or surfboards, in particular for snow, which is controlled by a combination of simple rotation and simple tilting of a single driving member, such as a handlebar, simultaneously by transverse tilting and longitudinal warping. Thus, it combines the necessary mechanical functions of a pair of conventional fasteners with the ease of use of the bicycle and does not require a special surfboard or pair of skis. It allows you to move freely on snow, either by driving with both feet, which remain stationary but not locked, or pushing on flat ground with one foot and keeping stable. Finally, it can be folded quickly for easy transport and storage.

The device is fastened without restriction by means of conventional screws or inserts and via at least one fastening base on a plurality of sliding supports for movement on different forms, in particular on snow. The device described below is used with a pair of snowboards or snowboards, but is not so limited.

Such a device for controlling a pair of skis or surfboards, in particular for snow, comprises: a first zone z for fixing the feet, which is located substantially on the first half of the board/snowboard pair, preferably mostly on two fifths of the board/snowboard pair, and is in particular made up of screw inserts or integrated supports able to receive screws, arranged on both sides of an axis a passing longitudinally through the board/snowboard pair at the centre of gravity of the board/snowboard pair; the perpendicular to the board/pair of snowboards forms a first plane P with the axis a at the zone z; a second zone z ' for fixing the feet, which is identical to the first zone, is located substantially on the second half of the board/pair of skis, preferably for the most part in the fourth fifth of the board, the perpendicular to the board/pair of skis forming with the axis a second plane P ' at the zone z '.

This device for driving is characterized in that it comprises:

a first connecting element of suitable shape and length, fixed to the board/snowboard pair at the zone z by a first end and a first base, and constrained at a point o' of its second end at least parallel to the plane P;

-a second connecting element of suitable shape and length, fixed to the board/snowboard pair at the zone z 'by a first end and a second base, and constrained at a point o of its second end at least parallel to the plane P';

-a third buckling element of suitable shape and length, fixed to the first connecting element at least at point o ', to the second connecting element at least at point o, and maintaining a fixed predetermined distance between point o' and point o;

the free movement of the warp element causes point o to be offset with respect to plane P and point o 'to be offset with respect to plane P'.

Document FR 2732609 describes a ski controlled by at least one handle, and document US2006/197294 describes a device for controlling a foldable ski vehicle operated by gravity.

Drawings

The invention will be better understood with reference to the accompanying drawings:

figure 1A shows a general perspective view of a pair of skis equipped with an embodiment of the device according to the invention in a rest condition and shows the different elements, axes and planes describing the invention and its kinematics.

Fig. 1B shows a general perspective view of a surfboard equipped with an embodiment of the device according to the invention in a rest condition, and shows the different elements, axes and planes that describe the invention and its kinematics.

FIG. 2A shows a perspective view of a pair of snowboards and their bases according to the present invention.

Figure 2B shows a perspective view of a surfboard and its base according to the present invention.

Fig. 3 shows a detailed perspective view of an embodiment of the connecting element.

Fig. 4 shows a detailed perspective view of another embodiment of a connecting element.

Figure 5 shows an overall profile view of an embodiment of the present invention warp system and geometry elements to control kinematics.

FIG. 6 shows a detailed perspective view of an embodiment of a removable connector.

Fig. 7A and 7B show perspective views in two different positions, respectively, in accordance with the principles of the present invention.

Fig. 8A and 8B show a perspective view and a front view, respectively, of a surfboard equipped with a device according to the present invention and the driving member of the surfboard is moved in a counter-clockwise direction, resulting in a buckling angle h according to planes P and P'.

Fig. 9A and 9B show a perspective view and a front view, respectively, of a surfboard equipped with a device according to the invention and the driving member of the surfboard is moved in a clockwise direction, resulting in a buckling angle h 'according to planes P and P'.

Figure 10 shows a perspective view of a surfboard equipped with a device according to the invention in a folded position.

Fig. 11 shows a perspective view of a variant of the device according to the invention.

Detailed Description

Unless otherwise indicated, the terms "about" and "substantially" mean within 10%, preferably within 5%.

With reference to the figures, a sliding support 1, such as a pair of snowboards (fig. 1A) or surfboards (fig. 1B) of the same type commonly found in commerce, is equipped with a preferred embodiment of the device according to the invention.

The device according to the invention comprises two zones z and z' for fastening the foot, each zone being located substantially on the opposite half of the board or snowboard, as shown in figure 2. These fastening areas are equipped with embedded metal inserts allowing the fasteners to be fixed thereto by means of screws. These insert sets are typically larger than can be used with conventional fasteners in order to have a range of longitudinal adjustment. Another known method is to integrate a stiffener into the ski, allowing a suitable screw to be fastened directly thereto. Another known means is the use of rails on the sliding support, allowing the base to slide, in order to adjust precisely the position of the base on said support.

The first base 2 is normally arranged on the first zone z by means of fastening holes 7 and screws (not shown) and cooperates with the insert 8 if necessary. The axis a passes longitudinally through the plate or pair of skis 1 in the middle of the plate or pair of skis. The base 2 is therefore arranged on both sides of the longitudinal axis a and has, on each side, two shaft lugs 9, each equipped with a shaft hole 10, these two holes 10 being coaxial along the transverse axis B. The base 2 is dimensioned and made of resistant material, such as metal or composite fibres, allowing to withstand the stresses to which it is subjected, while maintaining a low weight and volume. Its width on the board or pair of skis 1 allows in particular the feet to be easily engaged therein. The base is preferably equipped with anti-slip means in its upper part, in order to be able to better hold the foot while leaving it relatively free from precise engagement and positioning.

A second base 2', identical to the first base 2, is arranged in the same way at the second zone z' of the board or pair of snowboards 1 and defines in the same way an axis C transverse and parallel to the axis B. The base 2 'is therefore arranged on both sides of the longitudinal axis a and has, on both sides, two shaft lugs 9' equipped with shaft holes 10', these two holes 10' being coaxial along the transverse axis C. According to a variant, the bases 2 and 2' are not identical.

In the preferred embodiment according to the invention, in which the device is used to drive a pair of skis, the bases 2 and 2' fix the two skis to each other by means of screws, not shown, imposing a predetermined spacing and alignment on the skis. Thus, each ski will be exposed to stresses exerted by irregular terrain clearly, but the device according to the invention will make them move less clearly as a whole assembly, in particular with respect to longitudinal torsional stresses. With this arrangement, the pair of skis is formed similar to a surfboard whose length is cut along the longitudinal axis A.

The user can place a first foot on the first zone z and a second foot on the second zone z', i.e. preferably one foot on the first half of the board or pair of snowboards and the other foot on the second half of the sliding support. Thus, and even more preferably, by dividing the board or pair of skis into five consecutive sections of the same length along the length, the majority of the support surface of the first foot on the board or pair of skis 1 is located in the second section of the board or pair of skis, and the majority of the support surface of the first foot on the board or pair of skis 1 is located in the fourth section.

The plane P is defined (as shown in fig. 1) perpendicular to the board or pair of skis 1 and perpendicular to the axis B at the zone z. The second plane P 'is also defined as being perpendicular to the upper surface of the board or pair of snowboards 1 and perpendicular to the axis C at the zone z'. The angle between planes P and P' is referred to as h. When the board or pair of skis 1 is at rest, the planes P and P' are parallel and therefore the warp angle h between them is zero.

The first connection element 4, shown separately in fig. 4, is pivotally connected to the base 2 at the region z by a first lower end 15, in particular by means of a removable shaft 11 (such as a screw or pin) arranged coaxially to the axis B. The end 15 may form a housing that allows the user's hind foot to engage therein in an inverted U-shape. The width of the end portion 15 is dimensioned so as to be able to withstand leverage stresses exerted on the connecting element 4 on either side of the longitudinal axis a. The second upper end 17 of the connecting element 4 is in particular tubular and hollow in shape, forming a cylindrical housing 18 and equipped with a radial axial hole 19 cooperating with a removable shaft, such as a pin 20. A body 16 of predetermined shape and length of the connecting element 4 firmly connects the two ends 15 and 17 to each other. The shape thereof is asymmetrical according to a preferred embodiment and the plane P so as to allow to bypass the legs, and even the pelvis, of the rider standing normally upright on the board or pair of snowboards 1. Furthermore, in case of a significant bending of the leg, especially during jump landings, it is important to avoid any contact with the mechanical structure. Thus, in a preferred embodiment, the connecting element 4 is not rectilinear. According to one embodiment, considering a reference plane containing axis a and point o', more than 75% by volume of connecting element 4 is located on one side of the reference plane. This arrangement is easily reversible by means of the removable shaft 11, so that the user can choose on which side to place the connecting element 4. The body 16 of the connecting element 4 is thus located on either side of the user's leg. Generally, the elements for fastening the connecting element 4 to the board or to the pair of snowboards 1 are adapted to allow the mounting of the connecting element 4 towards one side of the reference plane or the other side of the reference plane.

When the connecting element 4 is free from other elements, it can pivot freely about axis B (as shown, for example, in fig. 7A). It is always constrained parallel to plane P. The distance by which the end 17 can be spaced from the plane P is predetermined and constant. The overall dimensions of the connecting element 4 and the material of construction may maintain this predetermined distance and optimally resist any transverse bending stresses. It is made of aluminium section or composite fibre, so that it possesses strength and light weight. The width of the end portion 15 is dimensioned so as to be able to withstand leverage stresses exerted on the connecting element 4 on either side of the longitudinal axis a.

The second connection element 3, shown separately in fig. 3, is pivotally connected to the base 2 'at the region z' by means of a removable shaft 11 (such as a screw or pin) coaxially arranged along the axis C, through a first lower end 12, which in particular forms a housing in which the other foot of the user is allowed to engage. The second cylindrical upper end portion constitutes the male shaft 14 and serves as a rotation shaft along the warp axis E. The shaft 14 is equipped with two retaining rings 13 on both sides. The rings are fastened by suitable means not shown. When the connecting element 3 is free from other elements, it can pivot about the axis C (as shown, for example, in fig. 7A). It remains constrained at all times parallel to plane P'. The centre of gravity of the shaft 14 is represented at point o. Thus, the distance separating the point o from the plane P' may be zero according to the present embodiment, but remains predetermined and constant. The warp axis E is coaxial with the shaft 14 and parallel to the plane P'. Point x represents the intersection between axis C and axis E. The overall dimensions of the connecting element 3 and the material of construction can maintain this predetermined distance and optimally withstand any transverse bending stresses. The connecting element 3 is constrained parallel to the plane P'. It is made in particular of aluminium profiles or composite materials, to combine strength and lightness. The width of the end portion 12 is dimensioned so as to be able to withstand leverage stresses exerted on the connecting element 3 on either side of the longitudinal axis a.

According to a variant not shown, the respective lower portions 15 and 12 of the connecting elements 4 and 3 are in particular left or right L-shaped, or even inverted T-shaped, these shapes then replacing the inverted U-shape described according to the preferred embodiment.

The warp member 5 described in connection with fig. 1, 5 and 7 has a lower female end 21 of a hollow cylindrical shape and serves as a hole. The center of gravity of the end portion 21 is located at the point o. Recall that the warp axis E passes through point o. It intersects axis C at point x. This axis E is coaxial with the cylindrical shape of the end 21, which is suitably fitted in diameter and length with the male shaft 14 of the connecting element 3. The end 21 is held captive without excessive play between the two rings 13 of the connecting element 3. An antifriction bearing (not shown) may be provided between the end 21 and the shaft 14.

The ends 21 and 14 are fitted coaxially to each other over a sufficient length to prevent any degree of freedom other than rotation between the connecting element 3 and the buckling element 5 and to withstand axial separation stresses. The length is ideally comprised between 20mm and 200mm, but greater than 10mm, depending on the material chosen. Also, the distance separating point o and point x is sufficient to withstand the axial separation stress, and is ideally comprised between 20mm and 200mm, but greater than 10mm, depending on the material chosen.

A body 22 of suitable shape and length is equipped with a cylindrical anti-friction cage 23, which is arranged at a predetermined distance from point x. The cylindrical cage 23 defines a point o' at its centre of gravity. The rotation axis D passes through the point o' and the point x. The axes E and D describe between them a predetermined caster angle g. The cylindrical holder 23 is fastened to the body 22 by means not shown, such as screws or rivets, allowing its height position to be adjusted if necessary.

According to the described embodiment, the warp element 5 is also equipped at its other end with a driving member 24 (such as a handlebar) provided with two gripping members 25 (such as handles). The centre of gravity of the grip member 25 defines a point k. According to conventional means, not shown, the driving member 25 can be adjustable in height with respect to the main body 22 of the warp element 5, through which it can slide.

According to a variant not shown, the respective shaft/hole functions of the elements 21 and 14 are reversed, the male part then being located on the warp element 5, inserted through the female part located on the rectilinear portion of the connection element 3. The mechanical stresses governing this variant are the same as those described according to the preferred embodiment.

The removable holding element 6 shown in fig. 6 is fixed on the cylindrical holder 23 via a ring 26, which is captive therein. The inner diameter of the ring 26 is substantially larger than the outer diameter of the cylindrical cage 23. Thus, the ring 26 is free to rotate, but is not capable of any translational movement along the body 22. The removable retaining element 6 also has a spindle 27 located in a radially extending portion of the ring 26. The spindle 27 is suitably dimensioned such that it can cooperate with the cylindrical housing 18 of the connecting element 4. The pin housing 28 extends the spindle 27 and cooperates with the pin 20 of the connecting element 4. Thus, the holding element may be pivotally connected to the upper end 17 of the connecting element 4.

The point o' represents the connection point between the warp element 5 and the connection element 4 and is located on the axis D and at the centre of gravity of the holding element 6. The return axis F passes through point k and point x. The axis of rotation D passes through the points x and o' and determines the possible axis of rotation of the warp element 5 by means of the drive member 24. When the user actuates the device according to the invention, each of his feet, due to gravity, generates a torque effect on the system through the connecting elements 3 and 4, which is proportional to the width of the surfboard or pair of skis 1. This torque effect is balanced on the axis F and is counteracted by the action of the user on the drive member 25 to maintain its balance and its trajectory. Thus, the offset distance d1 separating the point o' from the axis F adjusts the overall balance of the driving force between the lateral tilt and the axial rotation of the driving member 25 by the warp element 5. This distance is preferably comprised between 10mm and 200mm, more preferably between 40mm and 120mm, and even more preferably between 60mm and 100 mm.

When the removable retaining element 6 is in place in the upper end 17 of the connecting element 4, the point o' is inseparable from this connecting element and is at a fixed predetermined distance from the connecting element. Thus, when the device is stationary and the warp element 5 is not moving, point o is located at zero or a predetermined distance from plane P, and point o 'is located at zero or a predetermined distance from plane P'.

The object of the invention is to impose the offset of point o with respect to plane P and/or the offset of point o 'with respect to plane P' by means of the movement of the warp element 5, in particular by means of the rotary movement along axis D by means of the driving member 24; the distance separating points o and o' is fixed and predetermined.

According to a variant not shown, the locking function described below is ensured without removable insertion pins but in a single moulded part that pivots about the end 17 and has the necessary flange to hang on a fixed shaft provided through the hole 19 of said end.

When the removable pin 20 is not disposed through the pin housing 28, the connecting element 3, the buckling element 5 and the removable retaining element 6, which are connected to each other, are no longer connected to the connecting element 4, as shown in fig. 7A. The device according to the invention can then be folded up as shown in fig. 10A and 10B, which is practical for ski lift, transport or even storage.

When the removable pin 20 is co-located through the pin housing 28 and the shaft hole 19, then the elements 3, 4, 5 and 6 are fixed to each other (as shown in fig. 1) and theoretically form a hyperstatic assembly, allowing to drive the board or pair of snowboards 1 at least by tilting the driving member 24 on either side of the axis a. However, surfboards or skis have some flexibility in construction. Thus, a rotation along the rotation axis D by the rider of the driving member 24 is therefore possible and causes the board or pair of snowboards 1 to warp along the longitudinal axis a deforming, as shown in fig. 8A, 8B, 9A and 9B.

The warp element 5 is fixed to the connection element 3 but has at least one freedom of movement with respect to the connection element 3, rotating along the axis E, and this independently of the connection element 4 in fig. 7A and 7B, which is not connected to the warp element 5. Such a displacement is possible in both clockwise and counter-clockwise directions according to a minimum angular sector of at least 2 °, preferably at least several degrees, in particular 5 °, more preferably at least 20 °. In both of the preferred embodiments shown in fig. 7A and 7B, it is readily understood that this possible sector is 360 °. According to other embodiments, the low degree of freedom of the drive member 24 can be compensated by a higher value of the caster angle g for the same buckling effect on the board or pair of snowboards 1, but at the expense of a greater effort on said drive member.

For the same angular sector of rotation of the driving member 24 along the rotation axis D, the deformation caused by the effect of the warp on the board or pair of snowboards 1 is proportional to the value of the predetermined caster angle g separating the two axes D and E. The value g characterizing the angle between the axes E and D is at least 2 °, preferably at least several degrees, in particular 5 °, more preferably at least 10 °, to ensure a perceptible twisting effect, and is preferably comprised between 10 ° and 40 °, even more preferably between 20 ° and 30 °. If the value of the predetermined angle g is equal to 0 deg., the point o will be on the rotation axis D and its radial displacement will be zero. In this case, the surfboard or pair of skis 1 does not undergo any torsional deformation along the axis a.

The point o and the axis E are common to the connecting element 3 and the buckling element 5 (fig. 1, 3, 5), characterizing their axial consistency, as shown in particular in fig. 7A and 7B. Rotation of drive member 24 in the counterclockwise direction produces a warp angle h between planes P and P' that is characteristic of the warp that causes sheet 1 to turn left, as shown in fig. 8A and 8B. Clockwise rotation of the drive member 24 creates a warp angle h 'between the planes P and P', which is characteristic of the warp that causes the board or pair of snowboards 1 to turn right, as shown in fig. 9A and 9B.

This deformation causes point o to be offset with respect to plane P and point o 'to be offset with respect to plane P'. The camber angle h characterizes the magnitude of the camber effect on the board or pair of snowboards 1, independently of the distance separating the point o and the point x, since it is the value of the caster angle g that determines this magnitude.

When the drive member 24 is rotated to its maximum action amplitude, that is to say +/-90 ° with respect to its rest position, the angles h and h' are then equal to the predetermined back-rake angle g.

When the user drives his surfboard or his pair of skis, he engages the first foot substantially in the end 12 of the connecting element 3 and the second foot substantially in the end 15 of the connecting element 4. He can then tilt the board or pair of snowboards 1 laterally along the longitudinal axis a by leverage by means of the driving members 24. He can simultaneously rotate the drive member clockwise or counterclockwise as desired along the rotation axis D. Thus, in addition to the lateral leverage, this action also allows to exert a torsional stress on the board or pair of snowboards 1 along the longitudinal axis a in a proportional and simultaneous manner, and this torsional stress is characterized by the warping angle h between the planes P and P'. The warp element 5 is then pivoted about axis D.

When the rider tilts the board or pair of skis 1 laterally about the axis a by means of the driving members 24, he lifts the board or pair of skis from the snow towards its inside when turning and therefore, through leverage, opposes the downward force exerted by its own weight, which is proportional to the width of the board or pair of skis 1 and to the centrifugal force due to the speed of execution. Such force exerted by each of his feet is continuously transmitted to the driving member 24 through the first base 2, the connecting element 4, the removable retaining element 6 and the warp element 5 on the one hand and the second base 2', the connecting element 3 and then again the warp element 5 on the other hand. The user resists this force by means of a gripping member 25, such as a pair of handles, the center of gravity of which is indicated by point k in fig. 1. As shown in fig. 1 and 5, this resistance is exerted by leverage along a return axis F passing through point k and point x. This leverage is proportional to the distance separating point k and point x.

According to the variant described in connection with fig. 11, the connecting element 4 is substantially rectilinear and parallel to the plane P. The user's legs are then placed on either side of the connecting element 4. According to another variant, not shown, the retaining element 6 remains fixed to the connecting element 4 and can be separated from the buckling element 5 by the user. According to a variant not shown, the point o' and therefore the cylindrical cage 23 are offset backwards from the body 22 by means of suitable supports fixed to the body 22. According to this arrangement, the main body 22 is no longer coaxial with the rotation axis D. However, maintaining the distance d1, the operational and kinematic characteristics of the present invention are not altered as a result.

According to a variant that is not shown, at least one profile, in particular made of aluminum or composite material, is fastened to a snowboard or surfboard, in particular by means of screws, at the region z for fixing the foot. The profile is preferably provided with at least one rail in its upper part. The profile then acts as a support for the base 2 provided with holes whose central distance suitably fits the track of said profile. The fixing means, in particular screws, allow to firmly connect the profile and the base. By this arrangement the base 2 and thus the device connected thereto can be adjusted according to the direction of the track of the profile. Furthermore, the assembly is easy to disassemble and allows the base to be raised relative to the snow in the case of use on a pair of skis, to avoid any accumulation of snow acting as a brake.

According to another variant, not shown, the device according to the invention is provided with a safety device of the anti-slip type, such as the one conventionally used for skiing, at the board or pair of skis, which is triggered and stops the device when the user's foot is no longer supported thereon.

According to the variant shown in fig. 2C, at least one base 2 is replaced by a pair of bases 2A and 2B, each respectively fixed to a snowboard. These said seats therefore have an axial degree of freedom with respect to each other along the axis B, but remain always completely fixed to their connecting element 4 along the axis B, in particular by means of a shaft 11 passing right through the four holes 10 of the lugs 9 of the relative pair of seats. The susceptors 2A and 2B are no longer systematically coplanar with each other according to the area z. The same device is equipped with a connecting element 5.

According to another variant, not shown, the two seats constituting a pair are fixed to each other, in particular by means of metal screws connecting two holes 10 of the inner lugs 9 positioned opposite each other. The mutual axial freedom of the two bases constituting a pair is achieved.

According to another variant, the pair of seats is supported by the connecting element or by the adaptive reinforcements of the connecting element in at least four points parallel to the axis C and parallel to the axis C.

By means of this arrangement, each snowboard can freely interact independently of each other according to irregularities in the terrain, which is a decisive advantage for the use of the invention on board. In addition, the torsional forces acting on the handlebars are greatly reduced and the overall curvature of the snowboard under stress is more uniform.