FR3133020A1 - Rear attachment device for a gliding board - Google Patents

Abstract

Rear attachment device for a gliding board Rear binding device (1) intended to cooperate with a rear part of a ski boot to hold the ski boot on a gliding board, the binding device comprising:- a base (2) comprising two arms (5) sides,- a body (14) connected to the two arms (5) of the base by an articulation in rotation about a transverse axis (Y1) between a standby position and a shod position, the body (14) comprising a chamber (21) inside which are arranged a cam (22) and an elastic means (23), - at least one blocking element (31) passing through a first lateral opening (34) of the body and comprising blocking surfaces (32, 33) cooperating with the cam (22) and with a first arm (5) of the base. Figure for abstract: figure 1

Description

Rear fixing device for a sliding board Technical field of the invention

The invention relates to a binding device intended to cooperate with a rear part of a ski boot to lock the ski boot on a gliding board. The invention also relates to a method of assembling such a fixing device. The invention also relates to a sliding board comprising such a fixing device.

State of the prior art

For the practice of sliding sports on snow, a sliding board is used, in particular a ski, equipped with a fixing system allowing a ski boot to be attached. The binding system generally comprises a front binding device and a rear binding device cooperating respectively with a front part and a rear part of the ski boot. The rear fixing device must meet numerous requirements including:
- It must be easy to handle to easily attach or detach the ski boot from the gliding board.
- It must allow automatic separation of the ski boot from the gliding board when excessively high stresses appear, for example in the event of the user falling.
- It must effectively transmit the impulses given by the user and allow precise guidance of the gliding board.
- It must be light and compact.
- It must be resistant and reliable while remaining inexpensive and easy to manufacture.

Among the rear fixing devices known from the state of the art, a fixing device is known comprising on the one hand a base fixed to a gliding board, the base comprising two lateral arms, and on the other hand a body provided a heel grip, the body being connected to the two lateral arms of the base by a joint rotating around a transverse axis. The body is thus mobile between a waiting position (or unshod position), and a shod position. The body can reversibly move from one position to another to attach or detach the ski boot to the gliding board. The body comprises a chamber inside which is housed a device for automatically uncoupling the ski boot (also called a safety trigger device), this uncoupling device comprising a cam and a spring bearing on the cam. The cam and the spring are arranged so that the waiting position and the ground position of the body correspond to states of least tension of the spring. Publication FR2765115A1 discloses such a fixing device.

The fixing devices known from the state of the art are nevertheless insufficiently robust and/or too complex to manufacture. In particular, the cam of such fixing devices tends to wear out too quickly as the fixing device is used. Wear of this cam can then cause a malfunction of the mechanism for automatically separating the ski boot from the gliding board. To make the cam more robust, one solution would be to increase its size. However, this would require increasing the size of the chamber within which it is arranged, as well as the size of the opening through which it is inserted into the chamber. The fixing device would thus be bulkier, less practical to handle, and more expensive to manufacture.

Presentation of the invention

The aim of the invention is to provide a rear fixing device remedying the above drawbacks and improving the rear fixing devices known from the prior art.

More precisely, a first object of the invention is a rear fixing device that is both compact, robust and simple to manufacture.

The invention relates to a rear fixing device intended to cooperate with a rear part of a ski boot to hold the ski boot on a gliding board, the fixing device comprising:
- a base intended to be fixed to a gliding board, the base comprising two lateral arms,
- a body provided with a heel grip, the body being connected to the two arms of the base by an articulation rotating around a first transverse axis between a waiting position and a shod position, the body comprising a chamber inside which a cam and an elastic means are arranged so that the waiting position and the shod position of the body correspond to states of less tension of the elastic means,
- at least one blocking element passing through a first lateral opening of the body and comprising blocking surfaces cooperating with the cam and with a first arm of the base.

The fixing device may comprise a second locking element passing through a second lateral opening of the body and comprising locking surfaces cooperating with the cam and with a second arm of the base.

The body may further comprise a third opening comprising dimensions suitable for mounting the cam in the chamber through this third opening.

The chamber can extend along a main axis, and the third opening can be arranged at a lower end of the chamber, facing said main axis.

The at least one blocking element may further comprise a surface for guiding the body in rotation around the first transverse axis.

The at least one blocking element may comprise a first blocking surface cooperating with the cam, a second blocking surface cooperating with the first arm of the base, the rotation guide surface being arranged between the first blocking surface and the second blocking surface.

The base may comprise a fixing interface intended to be fixed on a gliding board, and a support intended to receive the support of a ski boot sole, the support being articulated in rotation relative to the interface of fixation around a vertical axis.

The base can comprise a support intended to receive the support of a ski boot sole, and the two arms can be articulated in rotation relative to the support around a second transverse axis.

The at least one blocking element may comprise a flange covering the first side opening of the body.

The fixing device may include a cover closing a third opening in the body.

The fixing device may comprise a locking axis passing through the at least one blocking element and the cam, along the first transverse axis.

The invention also relates to a method of assembling a fixing device as defined above, the method comprising:
- the supply of two arms of the base, the body, the cam, and the at least one blocking element, then
- inserting the cam into the chamber of the body through a third opening of the body, the third opening being arranged at a lower end of the chamber, then
- positioning the body provided with the cam relative to the two arms, then
- inserting the at least one blocking element through the first lateral opening of the body.

The invention also relates to a gliding board comprising a fixing device as defined above.

Presentation of figures

These objects, characteristics and advantages of the present invention will be explained in detail in the following description of a particular embodiment made on a non-limiting basis in relation to the attached figures among which:
There is a sectional view of a fixing device according to one embodiment of the invention, according to a section plane perpendicular to a transverse axis of the fixing device, the fixing device being in a roadway configuration.
There is a sectional view of the fastener, the fastener being in a waiting configuration.
There is a sectional view of the fixing device, the fixing device being in an intermediate configuration between the roadway configuration and the waiting configuration.
There is a perspective and exploded view of the fixing device.
There is a sectional view of the fixing device, along a section plane perpendicular to a main axis of a body of the fixing device.
There is a sectional and exploded view of the fixing device, along a section plane perpendicular to a main axis of a body of the fixing device.

detailed description

There illustrates in side view a rear fixing device 1 according to one embodiment of the invention. The fixing device 1 can be attached to a board for sliding on snowy terrain (not shown) such as a ski, or alternatively a monoski. The fixing device 1 is intended to cooperate with a rear part of a ski boot, in particular with a curb formed at the rear of the ski boot. As a note, the term "ski boot" refers to any shoe suitable for guiding a gliding board on snowy terrain. This term therefore covers in particular shoes for alpine skiing or monoskiing. The binding device is configured to hold a ski boot attached to the gliding board in cooperation with a front binding device, which cooperates with a front portion of the ski boot. The fixing device 1 is articulated between a roadway configuration (visible on the ) and a waiting configuration (visible on the ).

According to the point of view of the , the front is on the left side of the figure and the back is on the right side of the figure. It is assumed that the gliding board rests on a horizontal ground. The terms "upper", "lower", "top" and "bottom" refer to positioning relative to a vertical axis. The terms "front" and "rear" relate to a positioning relative to a longitudinal axis corresponding to the axis in which the ski boot extends: the front designates the toe area and the rear designates the area of the heel. The transverse axis designates an axis perpendicular to the vertical axis and the longitudinal axis. The transverse axis is generally parallel to an axis passing through the internal and external malleoli of a user of the fixation device.

The fixing device 1 comprises a base 2 fixed to the gliding board. In particular, the base 2 comprises a fixing interface 3, a support 4 and two lateral arms 5 linked to the support 4. The fixing interface 3 is rigidly fixed on the gliding board, in particular by means of fixing screws 6 screwed into the thickness of the gliding board. The support 4 extends under the sole of the ski boot, and is intended to receive support. The support 4 may comprise a plate extending parallel to the gliding board. The base 2 may further comprise a braking device 7 provided with a brake pedal 8 and two brake branches 9 arranged on each side of the fixing device 1. The braking device 7 is configured to brake the board of slides when the fixing device 1 is in the exposed configuration. The base 2 can also include a device for adjusting the position of the support 4 on the gliding board relative to the longitudinal axis. The adjustment device makes it possible to adapt the position of the binding device according to the length of the ski boot used. The base 2 can also include a recoil spring 10 configured to keep the binding device resting against the ski boot.

The two arms 5 extend from the support 4 generally upwards and towards the rear of the gliding board. They can in particular each extend in a plane perpendicular to the transverse axis, on either side of a lower rear part of the ski boot. They can be sufficiently spaced apart from each other to allow the heel of the ski boot to take place between the two arms 5. As is better visible on the , each of the two arms 5 can comprise a branch 11, in particular metallic, designed to resist the tensile forces induced by the operation of the fixing device. This branch 11 comprises a first end 12 connected to the support 4, and a second end 13 connected to a body 14 which will be detailed later. The two arms 5 can be articulated in rotation relative to the support 4 around a transverse axis Y2. In particular, the first end 12 of each branch 11 may comprise an opening 15 cooperating with a pivot axis 16. According to a variant embodiment the two arms 5 could also be fixed relative to the support 4.

Such a fixing device 1 is particularly compact and has a limited grip on the gliding board. In particular, the fixing device does not include any bulky structure fixed to the gliding board at the rear of the ski boot. The body 14 is suspended above the gliding board via the arms 5.

Advantageously, the support 4 can be articulated in rotation relative to the fixing interface 3 around a vertical axis. Such a rotating joint allows a certain rotation of the ski boot around the vertical axis. The fixing device thus obtained, also called pivot fixing, makes it possible to absorb certain shocks linked to the practice of board sports without causing the shoe to come off. Such a fixing device may in particular be particularly adapted to the practice of so-called “freeride” or “freestyle” skiing. This rotating articulation is made possible in particular by the arms 5 which connect the body 14 to the pivoting support. The body 14 can thus follow the rotational movement of the support 4. The absence of a structure fixed to the gliding board at the rear of the ski boot therefore allows the support 4 to pivot while retaining the rear of the shoe is well maintained. Alternatively, the arms 5 can also be connected to a non-pivoting base 4.

The body 14 is suspended by the two arms 5 at the rear of the ski boot. It may have a generally parallelepiped or cylindrical shape. More generally, it has a generally elongated shape along a main axis 17. This main axis 17 extends at least roughly vertically or inclined backwards by a few degrees when the fixing device 1 is in roadway configuration. The body 14 comprises a heel grip 18 capable of cooperating with the pavement formed at the rear of the ski boot. The heel grip 18 is formed at a lower edge of the body 14. The body 14 and the heel grip 18 can form one and the same part. The heel grip 18 is in particular configured to exert downward and forward-oriented support on the ski boot when the fixing device 1 is in the on-road configuration. In addition, the body 14 contains a device for automatically detaching the ski boot in the event of excessive stress on the binding device.

The body 14 is connected to the two arms 5 of the base 2 by an articulation rotating around a transverse axis Y1. This transverse axis Y1, hereinafter called "first transverse axis Y1" is distinct from the transverse axis Y2, which will be called "second transverse axis Y2". The body 14 is thus movable relative to the base 2 according to a pivot connection between a roadway position (illustrated on the ) and a waiting position (shown on the ). As we will see in more detail later, the first transverse axis Y1 passes through the second ends 13 of each arm 5 and at the level of a lower part of the body 14. When the body 14 is in the waiting position, the The main axis 17 extends at least roughly horizontally. We therefore understand that the body 14 pivots approximately a quarter of a turn forward (that is to say in the counterclockwise direction according to the point of view of Figures 1,2 and 3) when it passes from its waiting position to its floor position. Advantageously, the rotation of the body between the worn position and the waiting position can be at least 45°, or even at least 70°, or even at least 90°. Advantageously, the body 14 further comprises a shoe pedal 19, projecting forward when the body is in the waiting position. The boot pedal 19 is positioned on the trajectory of the heel of the ski boot and can be actuated by the user by a downward movement of the heel. The shoe pedal 19 is positioned forward in relation to the first axis of rotation Y1 and thus makes it possible to tilt the body 14 from its waiting position to its shod position by pressing the heel.

Advantageously, the fixing device 1 further comprises a stop means 20, integral with the arms 5, and configured to rest on the gliding board at least when the body 14 is in the waiting position. The stop means 20 makes it possible to maintain the body in a stable and optimal position so that the ski boot presses on the boot pedal 19. In particular, the stop means 20 limits the amplitude of rotation of the arms 5 around the second axis transverse Y2.

The body 14 comprises an internal chamber 21 which extends generally along the main axis 17. The device for automatically detaching the ski boot comprises a cam 22, an elastic means 23 and a piston 24 housed inside the chamber 21. As we will see later, the cam 22 is blocked in position relative to the arms 5. The piston 24 is movable in translation within the chamber along the main axis 17. The piston 24 is held in support against the cam 22 by the elastic means 23. The elastic means 23 is, in the present case, a helical spring but as a variant, it could take a different shape. The elastic means 23 comprises a first end bearing on the piston 24, and a second end bearing against the body 14. More precisely, the elastic means 23 can bear on a surface of a means 25 for adjusting the tension of the elastic means 23, this adjustment means 25 being fixed to the body 14. The adjustment means 25 may in particular comprise an adjustment screw 26 configured to adjust the position of the surface on which the elastic means 23 rests. A head of the adjustment screw 26 is accessible at an upper end of the body 14. By adjusting the tension of the elastic means 23, it is possible to adjust the stiffness of the fixing device, that is to say the threshold d effort from which the body 14 automatically switches to the off-shoe position. The elastic means 23 can be equipped with a slider 27 secured to the surface on which the elastic means 23 rests. Part of this slider can be made visible through a window 28 provided for this purpose in the body 14. In addition, the body 14 can be covered by a cover 29 fixed on the body 14 (for example screwed and/or clipped on the body 14). This cover 29 can in particular integrate a window covering the window 28 so as to keep the chamber 21 well sealed.

When the body 14 pivots between its fitted position and its waiting position, it pivots around the cam 22 which is fixed. A sliding then occurs at the interface between the piston 24 and the cam 22. Indeed, on the one hand the cam 22 is fixed relative to the arms 5 and therefore remains stationary when the body 14 pivots. On the other hand, the piston 24 is held in a sliding connection in the chamber 21 and therefore pivots with the body 14. The cam 22 has a bearing surface 30 with the piston 24 different from a surface of revolution centered on the first transverse axis Y1. In particular, the support surface 30 can extend along a projection 22A of the cam 22. The support surface 30 can be divided into two zones: a first zone 30A is a contact with the piston 24 when the body 14 is in the floor position and a second zone 30B is in contact with the piston 24 when the body 14 is in the waiting position. The first zone 30A may have substantially the shape of a wave. The second zone 30B can extend along a surface substantially perpendicular to the first zone 30A.

The sliding of the piston 24 along the zones 30A and 30B of the bearing surface 30 of the cam 22 causes a displacement by translation of the piston 24 inside the chamber 20. The shape of the bearing surface 30 of the cam 22 is chosen so that the tension of the elastic means passes through a maximum value between the shod position and the unshod position. This position, called the equilibrium position or reversal position, is illustrated in particular on the . It corresponds to a state of maximum compression of the elastic means 23. Consequently, the shod position and the unshod position of the body 14 correspond to states of less tension of the elastic means 23 compared to the equilibrium position. In the equilibrium position, the cam 22 rests on the piston 24 by a substantially linear contact, at the level of a rounded portion formed between the first zone 30A and the second zone 30B of the support surface. The equilibrium position is an unstable position from which the body 14 can easily switch to the ground position or to the waiting position. The pavement and waiting positions are stable positions. As a note, the cam 22 is designed so that the tension of the elastic means 23 is greater when the body is in the waiting position than when it is in the mounted position.

To block the cam 22 in rotation relative to the arms 5, the fixing device 1 comprises two blocking elements 31, clearly visible on the . Each blocking element 31 comprises distinct blocking surfaces 32, 33, cooperating with one of the two arms 5 and with the cam 22. A first blocking element 31 is arranged through a first lateral opening 34 and a second blocking element blocking 31 is each arranged through a second side opening 34. The two side openings 34 are formed on right and left sides of the body 14. The two blocking elements 31 preferably have an identical shape and are arranged symmetrically on two lateral sides of the body 14.

We therefore endeavor to describe in more detail a particular blocking element 31. The blocking element 31 comprises a first blocking surface 32 cooperating with the cam 22 and a second blocking surface 33 cooperating with an arm 5. The blocking surfaces 32 and 33 are offset from each other, i.e. that is to say that they extend along two distinct portions of the blocking element 31. The blocking surfaces 32 and 33 can be spaced a non-zero distance along the first transverse axis Y1. Each blocking surface 32, 33 extends between two planes perpendicular to the first transverse axis Y1. The first blocking surface 32 and the second blocking surface 33 are surfaces different from a surface of revolution. In this case, the blocking surfaces 32, 33 have the shape of a six-pointed star. However, this shape could be different: for example a star shape having a different number of branches, or even any polygonal shape such as for example a triangular, square or hexagonal shape, or even any notched shape. Generally speaking, this shape can be chosen so as to block the cam 22 relative to the lateral arms 5. Advantageously this shape has angular symmetry, which offers greater freedom for the assembly of the blocking element 31 because several orientations are possible. The first blocking surface 32 cooperates with an opening 35 of corresponding shape provided on one side of the cam 22. The second blocking surface 33 cooperates with an opening 36 of corresponding shape provided at the second end 13 of the corresponding arm.

As a note, according to the embodiment presented, the stop means 20 is formed by an arch 37 having substantially the shape of a U, the two opposite branches of the U being fixed at their upper end to the two blocking elements 31 , the base of the U being intended to rest on the gliding board. For this purpose, the arch 37 comprises two openings 38 of shape corresponding to the second blocking surface 33. Thus, the two lateral arms 5, the cam 22, the two blocking elements 31 and the stop means 20 form a set rigid. All the elements of this rigid assembly are fixed to each other, and locked in rotation relative to each other. We observe that the two arms 5 are positioned more towards the outside than the two opposite branches of the arch 37, which makes it possible to maintain a significant spacing between the two arms 5 and thus to avoid any conflict between the arms 5 and the heel of the ski boot. The ends of the side arms 5 and the arch 37 are juxtaposed.

Each blocking element 31 further comprises a rotation guide surface 39 of the body 14 around the first transverse axis Y1. The rotation guide surface 39 is in particular a cylindrical surface whose axis of revolution corresponds to the first transverse axis Y1. The rotation guide surface 39 is arranged between the first blocking surface 32 and the second blocking surface 33. The blocking surfaces 32 and 33 are also centered on the first transverse axis Y1. Each rotational guide surface 39 cooperates with a lateral opening 34 of the body. The lateral opening 34 therefore has a cylindrical shape whose diameter is slightly greater than the diameter of the rotating guide surface 39. A sliding bearing is thus formed at the interface between the body 14 and each blocking element 31. The circle circumscribed by the first blocking surface 32 has a diameter less than or equal to, preferably strictly less than, the diameter of the rotation guide surface 39. Likewise, the diameter of the rotation guide surface 39 is less than or equal to, preferably strictly less than the diameter of the circle circumscribed by the second blocking surface 33. The lengths of the two blocking surfaces 32, 33 and of the rotating guide surface 39 along the first transverse axis Y1 can be substantially equal or of the same order of greatness.

Consequently, each blocking element 31 combines several functions:
- it blocks the cam 22 in position relative to the arms 5,
- it blocks the stop means 20 in position relative to the arms 5,
- it guides the body 14 in rotation relative to the arms 5 around the first transverse axis Y1.

In an embodiment not shown, where the lateral arms 5 are not articulated in rotation relative to the support 4, the stop means 20 is not necessary. Thus each blocking element combines two functions:

- it blocks the cam 22 in position relative to the arms 5,

- it guides the body 14 in rotation relative to the arms 5 around the first transverse axis Y1.

In addition, the blocking elements 31 form plugs for the side openings 34, which prevents snow or water from entering the interior of the chamber 21. Advantageously, each blocking element 31 further comprises a collar 40 covering the side opening 34 of the body. The collar 40 has the shape of a disc of greater diameter than the diameter of the side opening 34.

Each blocking element 31 also comprises a central opening 41, oriented along the first transverse axis Y1. A locking pin 42 passes through the central opening 41 of the two blocking elements 31. The locking pin 42 is crimped at its two ends 43 so as to block any transverse movement of a blocking element 31 The locking pin 42 also passes through the openings 36 of each arm 5, through the openings 38 of the arch 37, and through the cam 22. It will be noted that the opening 35 of the cam 22 (which has a shape complementary to the first locking surface 32) is thus extended by a through opening, of cylindrical shape, and suitable for the passage of the locking axis 42. Figures 5 and 6 make it possible to clearly visualize the assembly of these different elements of the fixing device.

The body 14 further comprises a third opening 44 comprising dimensions suitable for mounting the cam 22 in the chamber 21. This third opening 44 is distinct from the two lateral openings 34 of the body 14. The third opening 44 is positioned at the level of a lower end of the chamber 21. In particular, the third opening 44 is oriented facing the main axis 17 of the body. The third opening 44 can extend between the heel grip 18 and the shoe pedal 19. The third opening 44 serves to mount the cam 22 in the chamber 21, and possibly the other components of the fixing device: in particular the piston 24 and the elastic means 23. The presence of this third opening 44 makes it possible to consider the use of a cam 22 of larger size than if it had had to be inserted into the chamber 21 through one of the side openings 34. In particular, the cam 22 can integrate a projection 22A which makes it possible to increase the bearing surface 30 of the cam 22. The forces supported by the cam 22 during the operation of the fixing device are distributed over a larger surface, this which reduces the contact pressure. Cam 22 is thus more durable. On the other hand, the side openings 34 can be kept relatively small, which improves the robustness of the body 14.

In addition, the cam 22 can be made of plastic, and not of metal, which makes it possible to lighten the fixing device. Plastic can in particular be loaded with fibers. The cam can also include a coating promoting sliding at its bearing surface 30 cooperating with the piston 24. The cam 22 can preferably be obtained by plastic injection. Likewise, the piston 24 and the blocking elements 31 can preferably be manufactured from injected plastic. The body 14, the stop means 20 and the arms 5 are preferably made of metal. Advantageously, the blocking elements 31 and the cam 22 are manufactured with the same plastic material. The fixing device 1 is thus light and easy to manufacture.

Advantageously, the fixing device 1 further comprises a cover 45 covering the third opening 44 in order to prevent any entry of water or snow into the chamber 21. The cover 45 can for example be clipped onto the body 14, at the level of a lower portion of the body. The cover 45 may comprise a first face extending substantially perpendicular to the main axis 17 and a second face forming the shoe pedal 19. Advantageously, the cam 22 and the cover 45 have shapes such that the cover is in contact with the cam when the body is in the shod position. This makes it possible in particular to facilitate the assembly of the different components of the fixing device as will now be detailed.

To manufacture the fixing device 1, we can proceed as follows. In a first step, the different components of the fixing device are supplied separately. In particular, we provide the two arms 5 of the base 2, the body 14, the stop means 20, the cam 22, the elastic means 23, the piston 24, and the two blocking elements 31.

In a second step, the cam 22 is inserted into the chamber 21 of the body through the third opening 44 of the body 14. Advantageously, the elastic means 23 and the piston 24 may have been previously inserted into the chamber 21 through the third opening 44. Preferably, the cam 22 can be inserted into the chamber 21 so that the first zone 30A of the bearing surface 30 is entirely in contact with the piston 24. Such positioning of the cam therefore corresponds in the fitted position of the body 14. After mounting the cam 22, the cover 45 can be fixed so as to close the third opening 44. The cover 45 can rest on the cam 22 and slightly compress the elastic means 23. The cam can thus be stabilized inside the chamber 21. The adjustment screw 26 can be mounted through the upper opening of the body 14. Finally, the cam 22, the elastic means 23 and the piston 24 are kept trapped in the room 21.

Then, in a third step, the body 14 equipped with the cam 22 is positioned relative to the two arms 5. In particular, the body 14 is positioned so that its orientation relative to the arms 5 corresponds to the fitted position of the body. 14. If necessary, the stop means 20 can also be positioned relative to the body 14 during this step. Templates may possibly be used to facilitate the correct positioning of components.

Then, in a fourth step, the two blocking elements 31 are inserted respectively through the two right and left side openings 34 of the body. The two blocking elements 31 can be inserted simultaneously or successively. The two blocking elements 31 having an identical shape, it is not necessary to distinguish a left blocking element from a right blocking element. Advantageously, the cam 22 is immobilized inside the chamber 21 as explained previously. In addition, the body 14 is oriented relative to the arms 5 which allows the blocking elements to be inserted without difficulty. In particular, the openings 35, 36 and 38 are correctly positioned relative to each other, which allows fluid insertion of the blocking elements 31.

Then, in a fifth step, the locking pin 42 can be inserted through the central openings 41 of the two blocking elements. The two ends 43 of the locking pin can then be crimped so as to secure the locking elements 31 in position. As a note, one of the two ends 43 of the locking axis 42 can be pre-deformed before its insertion through the two blocking elements 31, for example during its manufacture.

Finally, the subassembly obtained can be assembled with the other components of the base. In particular, the arms 5 can be connected to the support 4. The fixing device 1 can then be fixed on a sliding board. Alternatively, the elastic means 23 and the piston 24 could also be mounted in the chamber 21 through the upper opening of the body 14, at the place where the adjustment screw 26 is then positioned.

When a user wishes to use the gliding board equipped with the fixing device 1, first of all he attaches his ski boot to the gliding board with the fixing device 1 in waiting configuration. It positions the front of the ski boot abutting against a front binding device then lowers the heel of the ski boot until it activates the boot pedal 19. The stop means 20 comes into contact with the gliding board and limits the pivoting of the arms 5 around the second transverse axis Y2. Pressing the shoe pedal 19 causes the body 14 to rotate around the first transverse axis Y1 until reaching the treaded configuration. During this movement, the cam 22, which is fixed to the arms 5 by the blocking elements 31, remains substantially immobile. The piston 24 slides against the cam 22 and the elastic means 23 compresses to the point of equilibrium (illustrated on the ) then relaxes. The forces supported by the cam 22 are moderate and the cam does not tend to wear. During the putting on operation, the rotation of the body 14 around the first transverse axis Y1 can be accompanied by a rotation of the arms 5 around the second transverse axis Y2. The operation can be repeated numerous times without altering the operation of the fixing device. When practicing a gliding sport on snow, the ski boot is held very well to the gliding board. The fixing device optimally transmits the user's impulses to the gliding board. If necessary, the support 4 pivots around the fixing interface 3, which prevents unwanted release of the fixing device. Finally, to detach the ski boot from the board, simply push the body 14 backwards, which returns it to its waiting position. The different components of the fixing device then follow a kinematics opposite to that of the putting on operation.

Thus the invention described proposes a specific mounting and blocking of the cam 22 relative to the lateral arms 5 in a heel piece with a suspended body thanks to at least one specific blocking element 21. The invention applies not only to a fixing device equipped with lateral arms 5 movable in rotation relative to a base fixed to the ski but also to a fixing device equipped with lateral arms fixed in rotation on the base.

Claims (12)

Rear fixing device (1) intended to cooperate with a rear part of a ski boot to hold the ski boot on a gliding board, the fixing device comprising:
- a base (2) intended to be fixed to a gliding board, the base comprising two lateral arms (5),
- a body (14) provided with a heel grip (18), the body being connected to the two arms (5) of the base by an articulation rotating around a first transverse axis (Y1) between a position d waiting position and a floor position, the body (14) comprising a chamber (21) inside which are arranged a cam (22) and an elastic means (23) so that the waiting position and the shod position of the body correspond to states of less tension of the elastic means,
- at least one blocking element (31) passing through a first lateral opening (34) of the body and comprising blocking surfaces (32, 33) cooperating with the cam (22) and with a first arm (5) of the base.
Fixing device according to the preceding claim, characterized in that it comprises a second blocking element (31) passing through a second lateral opening (34) of the body and comprising blocking surfaces (32, 33) cooperating with the cam (22) and with a second arm (5) of the base.
Fixing device according to one of the preceding claims, characterized in that the body (14) further comprises a third opening (44) comprising dimensions suitable for mounting the cam (22) in the chamber (21) by this third opening.
Fixing device according to the preceding claim, characterized in that the chamber (21) extends along a main axis (17), and in that the third opening (44) is arranged at a lower end of the chamber, facing said main axis (17).
Fixing device according to one of the preceding claims, characterized in that the at least one blocking element (31) further comprises a rotation guide surface (39) of the body (14) around the first transverse axis (Y1 ).
Fixing device according to the preceding claim, characterized in that the at least one blocking element (31) comprises a first blocking surface (32) cooperating with the cam (22), a second blocking surface (33) cooperating with the first arm (5) of the base, and in that the rotation guide surface (39) is arranged between the first blocking surface (32) and the second blocking surface (33).
Fixing device according to one of the preceding claims, characterized in that the base (2) comprises a fixing interface (3) intended to be fixed on a gliding board, and a support (4) intended to receive the support of a ski boot sole, the support being articulated in rotation relative to the fixing interface around a vertical axis.
Fixing device according to one of the preceding claims, characterized in that the base (2) comprises a support (4) intended to receive the support of a ski boot sole, and in that the two arms ( 5) are articulated in rotation relative to the support (4) around a second transverse axis (Y2).
Fixing device according to one of the preceding claims, characterized in that:
- the at least one blocking element (31) comprises a flange (40) covering the first lateral opening (34) of the body, and/or in that
- the fixing device comprises a cover (45) closing a third opening (44) of the body.
Fixing device according to one of the preceding claims, characterized in that it comprises a locking axis (42) passing through the at least one blocking element (31) and the cam (22), along the first transverse axis ( Y1).
Method of assembling a fixing device (1) according to one of the preceding claims, characterized in that it comprises:
- the supply of two arms (5), the base (2), the body (14), the cam (22), and the at least one blocking element (31), then
- inserting the cam (22) into the chamber (21) of the body through a third opening (44) of the body, the third opening being arranged at a lower end of the chamber, then
- positioning the body (14) provided with the cam (22) relative to the two arms (5), then
- inserting the at least one blocking element (31) through the first lateral opening (34) of the body.
Sliding board, characterized in that it comprises a fixing device (1) according to one of claims 1 to 10.