EP0521282A1 - Skiboot with pivot locking device of the upper quarter - Google Patents

Abstract

According to the invention, such a boot (1) comprises an immobilising device (35) of the upper quarter (2) in an anteroposterior direction acting on an oscillating lever (11) capable of bearing on a stop (13) of the shell bottom (5). These means consist of a rotating member (10) with external control (18), an inner part (19) of which actuates, by means of a cam (19a), a feeler member (11b) belonging to the oscillating lever (11) in order to impart to the latter an angular deflection around its spindle (12) towards a locking or unlocking position relative to the stop (13) obtained on the shell bottom (5). <IMAGE>

Description

The present invention relates to an alpine ski boot, comprising a rigid shell, of which a shell bottom is surmounted by an at least partially articulated rod on the latter, having at least a front part and a rear part, and comprising itself opening means to allow the passage of the foot, a rod closure assembly on the lower leg comprising a clamping system with at least one traction element at least partially surrounding the rod to be tensioned by at least a tensioning device, fixed on at least one of the constituent parts of said rod.

More particularly, the invention relates to means for immobilizing the rod in an anteroposterior direction constituted by a control member acting on an oscillating lever, around a transverse axis of a rear part of the rod, in two positions, one in which a lower end portion of the lever abuts against a rear stop of the bottom of the shell at the heel or of a position of inclination chosen towards the front of the rod, corresponding to a active position for skiing, and the other in which said lower part escapes the rear stop of the bottom of the hull to release the rod from any angular positioning constraint, the control member then acting on another part of the lever oscillating against an elastic member.

To do this, it is known from documents EP-A-086 908 and EP-A-286 586, locking means of the aforementioned type in which a rocker has a lower end which abuts on a lower part of the shoe to force the upper of the latter to take an inclination commonly called "advancing angle", necessary for skiing; an upper end of said rocker has the form of a press button intended to allow unlocking of the rocker when the skier wants to take a rest position by straightening the leg, or else walk.

When the skier wants to start skiing again, he bends his leg to bring the rod back to the inclined position and the locking is then carried out automatically again without manual intervention.

The disadvantage of such a system lies in the fact that, when walking for example, in the unlocked position of the system, the automatic locking can occur untimely, in particular by climbing a slope such as to cause the rod to move. forward. This is due to the absence of a stable unlocked position.

It is easy to understand that repeated manual unlocking operations can be tedious for the skier.

To remedy this major and important drawback, it has been proposed, manual means for locking the aforementioned lever capable of immobilizing the latter in a stable position corresponding to the unlocking of the upper of the shoe as taught in the patent. French FR-A 2 648 327. According to the latter, the manual locking means consist of a part movable in vertical translation at the upper end of an arm of the rocker, which can be actuated manually in an upward sliding movement, to extend said upper end of the rocker, and to cooperate with a notch formed in the upper part of a cutout of the rod to keep the rocker in the unlocked position. A sliding control of said moving part has the effect of releasing the latter from the upper notch and allowing it to pivot, under the action of an elastic member, so that the lower end of said rocker comes into abutment on the abovementioned stop formed at the rear of the bottom of the shell for an active position.

In order to allow the moving part to move in translation, in one direction or the other, it has a protruding part constituting an external gripping member without which any control would be impossible.

Such locking means have a certain number of drawbacks, one of which is that, whatever the position of the movable member, when locked or unlocked, the external gripping member must always remain protruding to allow its access, and thereby constitutes an aggressive protruding part, likely to cause incidents. Another drawback appears on the conceptual level, because it is necessary to provide, on the one hand a relatively bulky rocker because it supports the movable member and the gripping member which is integral therewith, and on the other hand a notch higher to spare on the rod.

Finally, on a practical level of use, this system always involves two operations to achieve a stable unlocking of the upper of the shoe, namely a rectilinear pushing movement perpendicular to the upper to rotate the rocker in a release movement of its lower end of the stop, and a pushing movement also rectilinear substantially parallel to said rod to engage the movable part under the upper notch.

This latter drawback does not appear in other known devices for immobilizing the upper of a shoe where the means for locking or even actuating the lever are independent of the latter. By way of example, mention may in particular be made of the ski boot described in French patent application FR 2 619 317 where the device for immobilizing the upper comprises a stop means which on the one hand is subjected to the permanent action of an elastic force pushing it into its closed position, and on the other hand, can be actuated in the open position against this force by means of a control member located on the rod .

As illustrated, the stop means is housed in a recess in the rod and has the form of a lever with two arms pivoting about an axis mounted in the rod while the control member is pivotally mounted outside the rod, near the end of one of the arms of said stop lever.

In this type of construction, the unlocking of the rod is effected by tilting towards the outside of the control member which, coming into pressure on the corresponding arm of the stop lever, causes the release of the latter from its stop on the bottom of the hull. To relock the rod in the ski practice position, it is then necessary to bring the control member against the rod to allow the stop lever, under the action of the elastic return force, to be placed in position d 'commitment to its stop on the bottom of the hull.

As is clear, such an immobilization device has the drawback of being very prominent on the rear part of the rod and of requiring voluntary maneuvering on the control member to return to the locking position of the rod for skiing.

We can also cite as an example the device for immobilizing a ski boot upper described in the German utility model Gm 80 20 898. According to this document, the immobilizing device has a lever, integral with the upper, which is able to abut on an element of the shell of the shoe. Such a lever is actuated from an external cursor capable of moving linearly and acting angularly on the position of the lever, from an end articulation point, or central.

As previously, this device has the disadvantage of being prominent on the rod at its rear part, and this, in a permanent and variable manner since the cursor is capable of being moved in translation. Furthermore, it always involves a voluntary maneuver on the part of the skier to go from the unlocked position to the locked position for skiing. Still, the momentary unlocking maneuver with the possibility of automatic relocking is not possible.

• à immobiliser la tige de la chaussure par rapport au bas de coque en vue de la pratique du ski, de manière permanente et stable,
• à déverrouiller de manière également permanente et stable de ladite tige en vue de permettre l'utilisation aisée de la chaussure pour la marche,
• à déverrouiller de manière momentanée la tige simplement pour permettre le déchaussage ou pour permettre au skieur d'adopter une position debout de relaxation avec, avantageusement, reverrouillage automatique en position de pratique du ski dès relâchement de l'organe de commande et retour de la tige dans sa position angulaire initiale de pratique du ski.

The object of the present invention is to remedy these various drawbacks and to this end proposes a device for immobilizing the upper of a ski boot which is suitable:

• to immobilize the upper of the boot relative to the bottom of the shell with a view to skiing, permanently and stable,
• to also unlock said rod permanently and permanently in order to allow easy use of the shoe for walking,
• to temporarily unlock the rod simply to allow heaving or to allow the skier to adopt a standing position of relaxation with, advantageously, automatic relocking in the ski practice position as soon as the control member is released and the rod returns in its initial angular position for skiing.

Another object of the invention is to propose a device whose control member is inserted in the volume of the rear part of the rod; for this purpose, the control member on the one hand, is accessible either by its periphery or by its visible face, and on the other hand, it affects a unique position on the rear part of the rod regardless of the maneuver carried out, permanent locking, momentary unlocking, or permanent unlocking.

According to the invention, the alpine ski boot has a shell bottom surmounted by a rod which has a front part and a rear part obtained in one or more pieces, the rear part of said rod on the one hand being at least partially pivoting in the postero-anterior and / or antero-posterior direction and on the other hand, comprising a device for immobilizing relative to said bottom of the active shell for at least one of said directions of pivoting by means of a abutment and / or attachment zone obtained on said bottom of the hull.

A feature of the invention is that the immobilization device is maneuverable by means of a control member of an oscillating lever which is constituted by a rotary element capable of journalling in a co-axial housing forming a bearing, practiced in said rear part of the rod, and in which is fixed, free to rotate, said rotary element, independently of the oscillating lever subjected to the action of a return spring; the rotary element comprises an external gripping part which can be actuated manually in rotation, and an internal part acting by means of a cam on a probing member pivotally securing the oscillating lever, the two aforementioned parts being connected to each other by means of a cylindrical axis, housed in the bearing formed in the rod.

Another characteristic of the invention lies in the fact that the cam is constituted by a cylindrical part centered on the rotary element, whether it is integral with the end of the internal part of the latter or with the oscillating lever. It is obvious that a feeler member intended to cooperate with the cam is then provided on the part which is not provided with said cam. Furthermore, the cam has on its cylindrical periphery at least one ramp with a progressive profile which extends from a low point of probing to a high point extending by a zone for retaining the probing member. The difference in height between the bottom and top probing points is determined as a function of the engagement of the oscillating lever on the abutment or attachment zone obtained on the bottom of the hull and is at least sufficient to cause, by means of the feeler member pivoting of said oscillating lever at least corresponding to that of its engagement on said lower shell and obtaining the unlocking of the upper of the shoe.

According to a first embodiment, the cam has two progressive ramps each extending from the bottom point of the latter to a common retaining area where they meet. The actuator of the immobilization device associated with such a cam can thus be actuated either in the two directions of rotation in order to cause the unlocking of the upper of the shoe relative to the bottom of the shell.

According to a second embodiment of the above-mentioned cam, the latter comprises from the bottom point and on one side, a progressive ramp as described above and on the other side, a vertical wall or abutment surface against which abuts the probing organ. In this type of construction, the operating member of the immobilization device can thus be actuated only in a direction of rotation corresponding to that in which the ramp extends.

According to a third embodiment, the cam is obtained with two asymmetrical ramps which extend from and on either side of the low point. In this construction, one of the ramps is then intended to allow permanent unlocking and the other ramp, to allow momentary unlocking; for this purpose, the first ramp ends at the high point of unlocking of the cam by a retention zone of the feeler member while the second ramp extends at least up to the height of the high point of the first ramp but does not have a retention zone for the feeler member. In this way, when the cam is moved in rotation on the side of this second ramp, the device for immobilizing the rod can be unlocked and its return to the initial locking position can take place automatically as soon as the operating member of said cam is released; to facilitate return to the locked position, the cam and / or the operating member can advantageously be fitted with an elastic return element. Also, with or without this elastic return element, the unstable unlocking ramp of the cam can be provided relatively inclined so that, under the pushing effect of the return spring of the oscillating lever, the support reaction of the member probing on the latter promotes its return to the initial position on the low point as soon as the operating member is released.

In these examples of the construction of a cam with two asymmetrical ramps, only one of the directions of rotation applied to the operating member, to the right or to the left, thus determines, namely the momentary unlocking of the immobilization device with automatic return in locked position upon release, that is to say, permanently unlocking said device by retaining the feeler member at the top point of said cam.

Still in accordance with the invention; the rod immobilization device can be provided to immobilize the latter in the only antero-posterior pivoting direction or in both antero-posterior and postero-anterior pivoting directions relative to the bottom of the shell. In the case of immobilization in the anteroposterior direction only, the oscillating lever comprises an end part which cooperates, for example with a stop zone obtained on the bottom of the hull; in the case of immobilization in both directions of pivoting, the oscillating lever comprises a lug or latching pin which cooperates with a corresponding notch made in the bottom of the shell, when the rear part of the rod is brought into the active position of skiing. Also, in the case where it is necessary to leave a certain freedom in pivoting of the rear part of the rod and / or of the rod before immobilization, in particular to allow a control of the bending of the latter in amplitude, for example towards the 'before, the light extends in the vertical direction above the latching stud over a certain length determined by the thickness of the latter and the desired travel stroke.

• la figure 1 est une vue de côté d'une chaussure de ski dont une partie, en coupe verticale, montre le dispositif selon l'invention avec ses moyens d'immobilisation, représentés en position de verrouillage.
• la figure 1A est une vue de côté d'une chaussure de ski analogue à celle de la figure 1 mais pourvu d'un autre dispositif toujours conforme à l'invention.
• les figures 2, 3, 4, 5 et 6 et les figures annexes 2a, 3a, 4a, 5a et 6a, représentent différents modes de réalisation de la came qui est assujettie à l'organe de commande du dispositif d'immobilisation, laquelle came est montrée :
• vue en perspective sur les figures 2 à 6,
• vue développée à plat sur les figures 2a à 6a.
• Les figures 7, 8 et 9 illustrent des variantes de réalisation du moyen d'arrêt du dispositif d'immobilisation selon l'invention vu en coupe verticale.
• Les figures 10, 11, 12, 13, illustrent, vus de côté, différents types de chaussures réalisées conformément à l'invention.

Other characteristics and advantages of the invention will become apparent during the description which follows, with reference to the appended drawings showing, by way of examples and without limitation, various modes of construction of the invention:

• Figure 1 is a side view of a ski boot, part of which, in vertical section, shows the device according to the invention with its immobilization means, shown in the locked position.
• Figure 1A is a side view of a ski boot similar to that of Figure 1 but provided with another device still according to the invention.
• Figures 2, 3, 4, 5 and 6 and the accompanying figures 2a, 3a, 4a, 5a and 6a, show different embodiments of the cam which is subject to the control member of the immobilization device, which cam is shown:
• perspective view in FIGS. 2 to 6,
• view developed flat in FIGS. 2a to 6a.
• Figures 7, 8 and 9 illustrate alternative embodiments of the stop means of the immobilization device according to the invention seen in vertical section.
• Figures 10, 11, 12, 13 illustrate, seen from the side, different types of shoes produced in accordance with the invention.

By way of illustrative, nonlimiting example, the shoe 1 designated globally, and represented in FIG. 1, is of the "rear entry" type.

According to the invention, the ski boot 1 comprises a rod 2 having a front part 3 or front cover, and a rear part 4 or rear cover, and a shell bottom 5 to which the rear part 4 of the rod 2 is connected by means of rivets 6, the front part 3 of the rod 2 consisting of an extension of the bottom of the shell 5.

A clamping system at three points 7a, 7b, 7c, and for closing the rod 2 on the lower leg of the skier, comprises, in a manner known per se, three separate tensioning levers 8a, 8b, 8c which subject in tension traction elements such as cable loops 9a, 9b, 9c partially surrounding the rod 2 at its front part to be tensioned by said tensioning levers 8a, 8b, 8c, fixed for example on the side wings coming from the rear cover 4 for levers 8a and 8b and on the front of the shoe for lever 8c.

According to the embodiment shown in Figure 1, the shoe 1 is provided with an immobilizing device 35 of the upper 2, acting only in the anteroposterior direction; this immobilization device has a control member 10 acting on an oscillating lever 11 around a transverse axis 12 fixed in the rear part of the rod 2; the lever 11 oscillates in two positions, one in which a lower end portion 11a of the lever 11 abuts against a rear stop 13 of the bottom of the shell 5 at the heel for a position of inclination chosen towards the front of the rod, corresponding to an active position for skiing, and the other in which said lower part 11a escapes the rear stop 13 of the bottom of the shell 5 to release the rod from any angular positioning constraint, a member rotary control 10 then acting on another part 11b opposite the end 11a of the oscillating lever against an elastic member 14, which elastic member is disposed in a housing 15 formed in the lower part 11a of the lever 11 and acts in reaction against a lower part 16a of a stiffening beam 16 constituting the wall of the rear cover 4 of the rod 2. The axis 12 of the lever 11 is supported by a lug 16b secured to the beam d stiffening 16. The rotary control member 10 of the oscillating lever 11 is able to pivot in a coaxial housing 17 forming a bearing formed in said rear part 4 of the rod 2, and in which said rotary member is fixed, free to rotate 10 independently of the swing lever; for this purpose, the rotary member 10 comprises respectively, arranged on either side of the wall of the beam 16, an external gripping part 18 which can be actuated manually in rotation, and an internal part 19 acting by means of a cam 19a on the part 11b of the oscillating lever 11, which in fact constitutes the feeler member of the cam, the two parts 18 and 19 being interconnected by means of a cylindrical seat 20 housed in the bearing 17 formed in rod 2.

According to the present exemplary embodiment, the cam 19a is constituted by the very front end of the internal part 19 of the rotary control member 10, and acts on the end 11b of the lever 11 opposite its lower end 11a, between which ends 11a, 11b is located the transverse axis 12.

The front cam 19a of the control member 10 is preferably hollow, that is to say comparable to the end of a tube, and constituted by an inclined plane forming a ramp whose peripheral zone is in permanent contact with one of the ends 11b of the oscillating lever 11. This cam has a low point 24 and a high point 25 which correspond respectively to a position of immobilization in the antero-posterior direction or, conversely, to a position of freedom angular of the latter, for a certain angular rotation in one direction or the other applied to the gripping part 18 of the rotary operating member 10.

Also in the present example, the gripping part 18 of the rotary actuating member 10 is constituted by a flywheel with fins 18a, 18b arranged radially with respect to the longitudinal axis xx 'of said member 10 and forming between them a flat angle .

Of course, this gripping portion 18 of the operating member may be of any other shape, such as for example generally circular and in the form of a drum. In all cases, the gripping part 18 of the control member 10 is rigidly connected to its cylindrical axis 20, for example by means of a drive square 21. It is essential to note that the gripping part 18 of the rotary actuating member 10 generates a volume of revolution substantially corresponding to that of a housing 22, formed in the rod 2 in which takes place said gripping part 18, remaining in a single plane, without offset relative to the external wall of the rod 2, whatever the relative position of the cam 19a relative to the oscillating lever 11.

The retaining of the rotary actuator 10 on the wall 16a of the rod 2, which wall here constitutes part of the stiffening beam 16, is ensured by pinching said wall between the gripping part 18 and a circular shoulder 19b of the internal part 19 forming the cam 19a.

Also, the cam 19a has, at its highest part, a housing 19c or retaining zone which corresponds to the high point of unlocking in the form of a bowl in which the corresponding end 11b of the lever 11 is capable of being positioned to provide a stable unlocked position. This position is obtained by exerting a simple rotation in the direction F1 around the axis xx ', exerted on the fins 18a, 18b of the gripping part 18.

The rotation of the cam 19a, thus caused, then causes the end 11b of the lever 11 in an angular displacement around its axis 12 according to values such as the difference in height between the low point 24 of the ramp and its high point 25 corresponds at least to a pivot angle of the lever 11 allowing its lower part 11a to escape from the stop 13 in order to assume an unlocking position capable of making free the angular movement of the rear part 4 of the rod 2.

According to another embodiment shown in FIG. 1A, the immobilization device 36 differs essentially from the previous one in that the cam 40a, which is constituted by a cylindrical part centered on the rotary element 10 and whose cylindrical periphery comprises at at least one ramp, is formed on an intermediate part 40b of the lever 40 situated between the transverse axis 12A disposed at one end 40d of the lever 40, and another opposite end 40c of the same lever 40 capable of coming into contact with the stop 13 locking, said cam 40a being in permanent contact with a radial actuating finger 41, constituting the feeler member, integral with the control member 10A, said ramp comprising a low point 24 and a high point 25 which correspond, as before , respectively in a position of immobilization of the rod 2 in front, or conversely of angular freedom thereof, for a certain rotation in one direction or in the aut re applied to the gripping part 18 of the rotary actuating member 10A, acting on said cam 40a to cause said angular displacement of the lever 40.

Of course, the cam 40a, cited in this embodiment, may be provided, not on a part of the lever 40, but on an element of the internal part 19 of the rotary actuator 10A, for example at its end, in the form of a collar (not shown) forming an inclined plane. In this case, the lever 40 has a probing member such as a lug radial to the cam 40a.

In accordance with the invention, the cam 19a and / or 40a can have different profiles depending on the defined rotation direction and / or maneuver as well as the amplitude of the desired rotary movement to pass from a locking position to an unlocking position and / or vice versa.

In Figures 2 to 6 and 2a to 6a, it is precisely illustrated by way of example, several embodiments of the profile of a cam 19a of the type described briefly in Figure 1; these embodiments are obviously applicable to a cam 40a of the device of FIG. 1A.

In FIGS. 2, 2a and 3, 3a, the cam 19a is obtained with two symmetrical ramps 27 each extending progressively from the low point 24 to the retaining zone 19c passing through a high unlocking point 25. As explained previously, the difference in height between the low point 24 and the high point 25, identified by the letter "A" in FIGS. 2a and 3a, depends on the engagement of the lower end part 11a of the lever 11 against the stop 13 of the bottom of the shell 5, as illustrated in FIG. 1. According to the invention, this difference in height in fact represents the value of the travel of the end 11b of the lever 11 necessary for unlock the rod 2 relative to the bottom of the shell 5; this difference in height "A" is always less than or equal to the difference in height between the low point 24 and the retaining area 19c identified by the letter "B". In the embodiment of the cam 19a in FIGS. 2 and 2a, the retaining area 19c is advantageously embodied by a notch in which the feeler member is intended to snap which guarantees a stable unlocking position of the latter. and to index said cam 19a in rotation in the unlocking position of the shoe upper 2. Of course, as is done in Figures 3 and 3a, the retaining area 19c can simply be constituted by a planar bearing surface. In these two embodiments of the cam 19a (FIGS. 2, 2a, 3 and 3a), the latter can indifferently be operated, starting from the low point 24, in both directions of rotation to cause the unlocking of the rod. the shoe. To obtain an unstable unlocking position from such a cam, the retaining zone 19c is advantageously located beyond the unlocking point. In this way, when the cam 19c is only turned from its low point 24 to its high point 25 using the rotary member 10 and then released before reaching the retaining zone 19c, the upper of the shoe is then momentarily unlocked at the moment when the feeler member 11b reaches said high point 25; after release of the rotary control member 10, the cam 19c is then capable of returning to the locked position, under the pushing effect of the feeler member on the corresponding ramp of the latter. Also, the cam can be returned to the locking position under the effect of an elastic return element, not shown, which can be interposed between the rotary member 10 and the wall of the rear cover 4 on which it is retained, such structure being compatible with a cam comprising a retaining notch 19c or a notch to guarantee the stable unlocked position when the latter is desired, despite the elastic return effect.

Still according to the invention, and as illustrated in FIGS. 4, 4a, 5, and 5a, the cam 19a can also be obtained with two asymmetrical ramps 26 and 27 which extend on either side of the low point 24, one, 27, being intended to allow only the stable unlocking maneuver, and the other, 26, that the unstable unlocking maneuver; for this purpose, the ramp 26 extends clearly above the high unlocking point 25 up to a level 28 determining a difference in height "C" between the low points 24 and high 25 which is greater than the possibility of movement of the oscillating lever 11 authorized by construction in the rear part 4. Thus, when the cam 19a is maneuvered in rotation in the direction corresponding to the unstable unlocking, the end 11b of the lever rises on the ramp 26 and passes the high point 25 in the direction level 28 by pivoting the lever 11 until the latter comes into abutment, for example by its end portion 11a, against the wall 16 of the rod. As soon as the operating member 10 is released, the cam 19a then tends to return to its initial locking position as described above. Advantageously, as shown in FIGS. 5 and 5a, the ramp 26 is very inclined so that a relatively low pressure of the feeler member, or end 11b, causes the bearing 19a to rotate by pressing reaction. 'said probing member stabilizes on the low point 24 of locking.

Regarding the unlocking ramp 27, it is produced in a similar manner to that described with reference to Figures 2 to 3a above.

In the example of FIGS. 6 and 6a, the cam 19a is designed to be operated only in one direction of rotation and is provided for this purpose with a stop surface 29 extending substantially vertically on one side of the low point 24 opposite a single release ramp 27.

In all cases of production of a cam with asymmetrical ramps, FIGS. 4 and 5, or of a single ramp cam, FIG. 6, the stable unlocking ramp 27, can extend indifferently in any of the directions. of rotation of said cam and cover a more or less significant angular sector; this latter characteristic also being valid for ramp 26.

The immobilization devices 35 and 36 which have just been described with reference to FIGS. 1 and 1A block the rear part 4 of the upper 2 of the shoe only in the direction of an anteroposterior pivoting around the connecting rivets 6 with the bottom of the shell 5; this blocking is obtained because the oscillating levers 11 and 40 have lower end portions 11a and 40c which simply come to bear on the latter. Without departing from the scope of the invention, it is also conceivable to produce immobilization devices similar to those 35 and 36 but the oscillating levers 11 and 40 of which are provided with parts which, by cooperating with a stop at the bottom of the hull, ensure blocking of the rear part 4 of the upper 2 of the shoe also in the postero-anterior direction.

For example, there is shown in Figure 7 such an immobilizer 37 incorporating the constituent elements of the immobilizer 35 of Figure 1 with the exception of the lower end portion 11a of the oscillating lever 11 This end portion 11a takes the form of a projection 42 and constitutes a latching pin intended to cooperate with a corresponding stop or notch 43 obtained in the bottom of the shell 5, when the immobilization device 37 is placed in the rod locking position and the rear cover 4 is brought into skiing position. Indeed, as long as the rear cover 4 remains tilted rearward, the operation of the immobilization device 37 for locking purposes only provides freedom of pivoting of the oscillating lever 11, which is, in this position of the rear cover 4 , in abutment against the outer wall of the shell bottom 5 by its lower end portion 42, the elastic member 14 then being compressed. In this embodiment, the elastic member 14 is made of an elastically compressible material instead of a helical spring as shown schematically in Figures 1 and 1A.

In FIG. 8, the immobilization device 38 is also of the anteroposterior locking type; this device incorporates the constituent elements of the immobilization device 36 of FIG. 1A with the exception of the lower end part 40c of the oscillating lever 40 which is made in the shape of a pin 42 in the same way as on the oscillating lever 11 of the device 37 in FIG. 7.

According to another embodiment, the immobilization devices 37 and / or 38 according to the invention can also cooperate with a stop or notch 43A of the bottom of the shell 5 extending, in the vertical direction, over a certain length, at least greater than the thickness of the pin 42, as shown in the example in FIG. 9 In this example, it is an immobilizing device 37 which is shown in the active position, the pin 42 being engaged in the light 43A. The rear part 4, or rear cover, being centered on the connecting rivets 6, can thus pivot on its rivets for a certain angular value as a function of the length "H" of the light 43A extending above the tenon 42.

Still within the framework of the present invention, the shoes can have structures different from the preferred ones described with reference to FIG. 1 or 1A, and benefit in the same way from an immobilizing device 35, 36, 37 or 38 such as described above.

• en figure 10, d'une chaussure 1A du type à "entrée mixte" ou à "entrée centrale" sur laquelle une languette transversale 30, recouvre au moins partiellement une autre languette 30a, ces languettes étant venues du bas de coque 5 et appartenant à la partie antérieure 3A de latige 2A de la chaussure 1A ; dans cette chaussure, non seulement la partie arrière 4A est escamotable, mais également, les languettes transversales 30 et 30a qui s'étendent sur la zone antérieure supérieure du pied ce qui permet d'une part l'ouverture de cette zone pour l'introduction ou l'extraction du pied par écartement desdites languettes, et d'autre part, la fermeture de ladite zone par recouvrement de la languette 30 sur celle 30a qui lui est opposée à l'aide d'un système de serrage 7c par exemple.
• en figure 11, d'une chaussure 1B du type à "entrée arrière" ; dans l'exemple de construction représenté, le débattement dans le sens postéro-antérieur du capot avant 31 est contrôlé par un curseur de contrôle de flexion 32 tandis que le dispositif d'immobilisation bloque la tige dans le sens antéro-postérieur.

It can indeed be:

• in FIG. 10, of a shoe 1A of the “mixed entry” or “central entry” type on which a transverse tongue 30, at least partially covers another tongue 30a, these tongues having come from the bottom of the shell 5 and belonging to the front part 3A of the leg 2A of the shoe 1A; in this shoe, not only the rear part 4A is retractable, but also, the transverse tabs 30 and 30a which extend over the upper front region of the foot, which allows on the one hand the opening of this zone for introduction or the extraction of the foot by spacing said tabs, and on the other hand, the closing of said zone by covering the tab 30 on that 30a which is opposite to it using a clamping system 7c for example.
• in FIG. 11, of a shoe 1B of the "rear entry"type; in the example of construction shown, the movement in the posterior-anterior direction of the front cover 31 is controlled by a bending control slider 32 while the immobilization device blocks the rod in the antero-posterior direction.

• en figure 12, d'une chaussure 1C, du type à "entrée mixte" ou à "entrée par le dessus" dans laquelle le capot arrière 4C est susceptible de basculer vers l'arrière, tandis que le capot avant 3C, remplaçant les ailes de recouvrement 30 de la chaussure 1A (figure 10) constitue un capot d'un seul tenant, articulé dans la zone du bout de la chaussure 1C par l'intermédiaire d'une liaison articulée 33, et dont le basculement permet le chaussage ou le déchaussage ;
• en figure 13, d'une chaussure 1D du type également à "entrée mixte" ou à "entrée par le dessus", comme la chaussure 1C (figure 12), mais les moyens de fermeture du capot avant 3D, par rapport au capot arrière 4D, s'effectuent par des moyens de serrage 7 assurant simplement la connexion entre lesdits capots 3D et 4D sans recouvrement important des ailes du capot arrière sur le capot avant tel que cela a été décrit en référence aux chaussures des figures 1 et 1A.

Of course, in the absence of the cursor 32, it would also be a shoe with "mixed entry", the front and rear covers, respectively 3B, 4B, would be able to move apart simultaneously or individually;

• in FIG. 12, of a shoe 1C, of the type with “mixed entry” or with “entry from above” in which the rear cover 4C is capable of tilting towards the rear, while the front cover 3C, replacing the wings covering 30 of shoe 1A (FIG. 10) constitutes a cover in one piece, articulated in the area of the toe of shoe 1C by means of an articulated link 33, and the tilting of which allows the shoe to be put on or heaving;
• in FIG. 13, of a shoe 1D of the type also with “mixed entry” or “entry from above”, like shoe 1C (FIG. 12), but the means for closing the front cover 3D, relative to the rear cover 4D, are effected by clamping means 7 simply ensuring the connection between said 3D hoods and 4D without significant overlap of the wings of the rear cover on the front cover as has been described with reference to the shoes of Figures 1 and 1A.

Claims (12)

Alpine ski boot comprising a shell bottom (5) surmounted by a rod (2, 2A, 2B, 2C, 2D) which has a front part (3, 3A, 3B, 3C, 3D) and a rear part (4 , 4A, 4B, 4C, 4D) obtained in one or more pieces, the rear part of said rod (2, 2A, 2B, 2C, 2D) on the one hand, being at least partially pivotable in the postero-anterior direction and / or anteroposterior and on the other hand, comprising an immobilization device (35, 36, 37, 38) relative to the bottom of the shell (5) active for at least one of the directions of pivoting of the posterior part (4, 4A, 4B, 4C, 4D) of the rod (2, 2A, 2B, 2C, 2D), by means of a stop zone (13, 43, 43A) obtained on said bottom of the shell ( 5) characterized in that the immobilization device (35, 36, 37, 38) is operable by means of a rotary control member (10) of an oscillating lever (11, 40) pivoting on a transverse axis (12, 12A), this rotary control member (10) is t able to journal in a coaxial housing (17) forming a bearing, made in the rear part (4, 4A, 4B, 4C, 4D) of the rod (2, 2A, 2B, 2C, 2D), and in which is fixed , free to rotate, said rotary member (10), independently of the oscillating lever (11, 40) subjected to the action of a return spring (14), which rotary member has an external gripping part (18) and a internal part (19) acting, by means of a cam (19a, 40a) cooperating with a feeler member (11b, 41), on the oscillating lever (11, 40), thus pivotally secured relative to the stop zone (13, 43, 43A) at the bottom of the hull (5). Ski boot according to claim 1 characterized in that the cam (19a, 40a) is constituted by a cylindrical part centered on the rotary member (10) and in that it has on its cylindrical periphery at least one ramp ( 27) with a progressive profile which extends from a low point (24) to a high point (25) extending by a retaining zone (19c), the cam (19a, 40a) cooperating with the feeler member (11b, 41) to which the oscillating lever (11, 40) is attached. Ski boot according to claim 2, characterized in that the difference in height between the low (24) and high (25) points is determined as a function of the engagement of the end (11a, 40c) of the swing lever (11 , 40) on the abutment zone (13, 43, 43A) obtained on the bottom of the shell (5) and is at least sufficient to cause, by means of the feeler member (11b, 41), a pivoting of said lever (11, 40) corresponding at least to that of the engagement of its end (11a, 40c) on said stop zone (13, 43, 43A). Ski boot according to claim 3 characterized in that the cam (19a, 40a) comprises, from the low point (24) and on each side of the latter, a progressive ramp (27) which extends up to a retaining area (19c) common to the two ramps (27). Ski boot according to claim 3 characterized in that the cam (19a, 40a) comprises, from the low point (24) on one side, a progressive ramp (27) and on the other side, a surface of stop (29) against which the feeler member (11b, 41) abuts. Ski boot according to claim 3 characterized in that the cam (19a, 40a) has, from the low point (24) two progressive ramps (26, 27) asymmetrical. Ski boot according to claim 6 characterized in that the ramp (26) of the cam (19a, 40a) extends beyond the high point (25) and does not have a retaining zone. Ski boot according to any one of claims 1 to 7 characterized in that the cam (19a) is formed by the end of the internal part (19) of the rotary member (10) and that it secures the oscillating lever (11) pivoting through the end portion (11b) of the latter which constitutes the feeler member (11b). Ski boot according to any one of Claims 1 to 7, characterized in that the cam (40a) is formed on an intermediate part (40b) of the lever (40) which is located between its transverse axis (12A) disposed at the 'one (40b) of its two ends (40b, 40c) and its other end (40c), opposite, which is intended to cooperate with the stop (13, 43, 43A) of the bottom of the shell (5). Ski boot according to any one of the preceding claims, characterized in that the immobilization devices (35, 36) have an oscillating lever (11, 40) which has an end part (11a, 40c) capable of coming bearing against the stop (13) of the shell bottom (5) only when the rear part (4) of the upper of the shoe is pivotally biased in the anteroposterior direction. Ski boot according to any one of Claims 1 to 9, characterized in that the immobilization devices (37, 38) have an oscillating lever (11, 40) which has an end part (11a, 40c) provided an attachment tenon (42) intended to cooperate, when the rear part (4) of the upper of the boot is brought into the active skiing position, with a corresponding notch (43, 43A), by interlocking to immobilize in pivoting said rear part (4) in the antero-posterior and postero-anterior directions. Ski boot according to claim 11 characterized in that the notch (43A) extends in the vertical direction and has a certain length greater than the thickness of the stud (42) for a value (H) corresponding to a clearance possible of said tenon (42) in said lumen (43A) determining the freedom in pivoting of the rear part (4) of the rod in the postero-anterior direction before blocking.

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