EP0890379B2 - Ski binding - Google Patents

Description

Technical area

The present invention relates to a ski binding with shear fasteners, which is pivotally attached to the ski pivotably about at least one transverse axis.

State of the art

In terms of their function, ski bindings are subdivided into piste bindings, which are used only for downhill skiing and downhill skiing, and touring bindings, which are also used for walking on skis, in particular for ascending with the help of climbing skins attached to the skis. While the former only have to ensure a reliable fixation of the ski boot on the ski in a so-called downhill position, the latter must be brought to ascend additionally from the downhill to a climbing position of the binding, in which the ski boot usually only in the ski boot tip about a transverse axis is pivotally mounted on the ski and in the heel area of the ski can be lifted to allow for walking a joint movement between the ski boot and ski.

At touring bindings are set for ascending and descending completely different, sometimes conflicting requirements. During ascent, the greatest possible freedom of movement between the ski boot and the ski is desired in order to allow unhindered walking or climbing. On the other hand, a rigid connection between the ski and the ski boot on the one hand and between the ski boot and the foot / lower leg on the other hand is desirable on the descent in order to allow optimum control or guidance of the skis.

In earlier years, only a limited support of foot / lower leg was achieved with the leather shoes mainly made of leather due to the relatively small stiffness of the shoe leather. As a result, on the one hand, a part of the foot mobility required for ascending was already achieved by the flexibility of the ski boots themselves, on the other hand touring bindings could be used, which did not restrict the flexibility of shoe upper and shoe sole. For example, in AT 343 522 (Hausleithner) described a touring binding, which supports the mobility of a flexible shoe sole by being on the one hand about a first transverse axis in the area of the shoe tip pivotally mounted on the ski and on the other hand in the ball area to a second transverse axis is additionally bendable ,

However, since the emergence of plastic ski boots, ski touring skiers are no longer prepared to forego the much greater grip and thereby better skiing on the downhill, which are accessible with ski touring boots made of plastic. Today, only plastic ski touring boots with a stiff shoe sole and ski bindings suitable for such ski boots are available on the market. Such a touring binding, which in particular also meets all the safety requirements of modern piste bindings, is described in WO 96/23559 (Fritschi). Ski bindings of this type are typically pivotable in the ascent position about a horizontal transverse axis in the area of the toe.

Since a stiff-footed pivotal movement about a toe-tip pivot axis does not conform to the natural motion dictated by the anatomy of the human body, various efforts have been made to develop touring bindings that allow a more ergonomic ascending motion (see eg US-A-4,854,605) ).

CH-659 397 (Flückiger) describes a ski binding with a walking attachment which in a first phase of the joint movement allows a pivoting movement about a transverse axis in the footpad area and in a second phase a pivotal movement about a transverse axis in the toe tip area. The shoe is thus connected via a double joint connection with two different pivot axes with the ski. Firstly, while this walking accessory allows a certain approximation to a natural movement, it has the disadvantage that the transition of the joint movement from a pivoting movement about the first transverse axis to a pivotal movement about the second transverse axis occurs abruptly, which causes a jerky change of the movement for the skier The result is a stroke on the tibia and / or heel at each step. Second, the design tie height and consequent height of shoe position over the ski is considerable. In addition, the walking gear for departure must be removed from the binding and carried separately.

WO 87/01296 (LaFranconi) shows a binding in which the joint between the binding plate and the ski lies in front of the toe. In order to avoid the disadvantages of this type of binding and to achieve a physiologically better movement while walking, a spacer between ski and binding plate is placed under the ball of the foot, so that a tilting movement is possible around a point, which is set back relative to the tip of the foot and practically under the ball of the foot lies. The spacer is a panel substantially vertical to the ski surface which is part of a collapsible mechanism so that it can be stowed flat during descent under the binding panel. The binding plate is connected at the front end via a double joint with the ski. The spacer is attached to the binding plate and forms a kind of rocker with pointing down tip on which a roll is mounted. The roller rolls on the flat ski upper side and moves back and forth as it moves in accordance with the tilting movement of the binding plate. At the front end, the connector has stoppers that define the maximum top pivot position of the connector. From the ski-parallel position, the connecting piece can therefore not be pivoted further upward than the stoppers permit. In this way, the stoppers ensure that the binding plate in the ascent position does not go beyond the "zero position" (ski-parallel position) into a "negative" inclination position.

Presentation of the invention

The object of the present invention is to provide a ski binding by which the disadvantages of the known ski bindings are overcome.

The solution of the problem is the subject of claim 1.

Advantageous further developments of the invention are the subject of the dependent claims.

The ski binding according to the invention has means for attaching a shoe to the binding, which are hingedly attached to the ski pivotably about at least one transverse axis. In addition, the ski binding according to the invention has a cam body which controls the joint movement between the shoe fastening means and the ski and has at least one an area in the longitudinal direction of the convex curved surface.

In order for the cam body to be able to exert its guiding function for the joint movement, the joint between shoe attachment means and ski must of course have more than one (rotational) degree of freedom, since a rotary joint or swivel joint with exactly one rotational degree of freedom, as is usual in known touring bindings , forces a circular motion whose orbit can no longer be controlled additionally. A joint which, on the one hand, allows the shoe fastening means to be pivotably attached to the ski about a transverse axis and, on the other hand, has more than one (rotational) degree of freedom, can e.g. on a double joint with two swivel axles, a rotary-swivel joint, a curve joint u.a. based. For better distinction, the term "pivoting movement" is used below for a pure rotary or pivotal movement about a fixed pivot axis, while the articulated relative movement between the ski on the one hand and the shoe or shoe fastening means on the other hand is generally referred to as "joint movement " referred to as.

The inventive cam body controls the joint movement by means of a rolling process between the convexly curved surface and a mating surface.

The rolling process between the convexly curved surface, which defines a rolling or rolling-off curve in the longitudinal direction of the ski, and the mating surface can consist of a pure, sliding-free rolling or a rolling combined with sliding. In the following, the terms "rolling" and the terms derived therefrom are used both for a smooth rolling and a rolling combined rolling.

Furthermore, the term "ski binding" in the following is not mistaken to mean that a ski binding can be mounted exclusively on skis. The term "binding" refers rather to a binding which, in addition to attachment to piste and touring skis, can also be attached to all other types of skis, snowboards, big-foots, snowshoes, roller skis, skate skates and similar devices which provide a flexible connection between a shoe and a ski require the device.

The inventive device ensures an ergonomic, smooth movement when climbing with skis. A further advantage results from the use of a tour binding according to the invention in conjunction with a climbing aid customary for touring bindings. Since the binding according to the invention already provides a substantial facilitation of ascending, in particular on steep terrain, the climbing aid used in conjunction with the binding according to the invention must support the heel of the shoe less highly in comparison with climbing aids with known touring bindings, in order to achieve the same degree of relief during the ascent cause. Thus, smaller and therefore lighter climbing aids can be used in connection with the binding according to the invention than with conventional touring bindings.

In a preferred embodiment of the invention, when the ski boot is lowered, the cam body is arranged in an area between the ski boot and the ski, viewed in the ski longitudinal direction, in front of the shoe center. Preferably, the cam is configured and arranged so that at least in one phase of the articulation movement for ascending the cam is rolled so that the distance between the shoe heel and the support line of the cam increases with increasing lift the shoe heel.

Preferably, the cam body is provided for the purpose of longitudinal guidance of the cam during articulation with at least two stepwise arranged surfaces. The stepped surfaces may be formed to cooperate with correspondingly shaped step-shaped surfaces on the ski or on binding parts attached to the ski.

In a preferred embodiment of the ski binding according to the invention, the cam body is arranged on the shoe fastening means and / or on other fastening parts attached to the shoe such that when the shoe is lowered, the convexly curved surface lies on the underside of the cam body which is opposite the ski upper side. Preferably further on the ski and / or on the ski-mounted binding parts a rib transverse to the ski longitudinal direction is arranged under the cam body that at least in a phase of joint movement of the cam body is rolled on the rib, in which phase the distance between the shoe heel and the bearing line of the cam remains substantially constant as the heel of the shoe increases.

Furthermore, an embodiment of the invention is preferred in which the cam body is designed as an integral part of the shoe fastening means. Preferably, the shoe attachment means comprise a support on which the ski boot is fastened, wherein the cam body is designed as a front part of this carrier.

The inventive binding further comprises a double joint-like device, wherein the shoe fastening means are pivotable about a first transverse axis pivotable on an intermediate member, which is articulated pivotably about a second transverse axis on the ski. Preferably, the first transverse axis is formed as a pivotal connection between the intermediate member and the cam body.

A further advantageous embodiment of the invention is characterized by a spring which acts between the intermediate member and the shoe fastening means and which is designed and arranged such that it counteracts a pivoting movement of the shoe fastening means in the direction of increasing the heel of the shoe about the first transverse axis. Preferably, there is further provided a spring acting between the intermediate member and the ski, which spring is designed and arranged in such a way that that it counteracts a pivoting movement of the intermediate member in the direction of an increasing angle between the ski and the intermediate member about the second transverse axis. Advantageously, the two springs are designed and arranged such that a greater torque is exerted with respect to the second transverse axis by the spring acting between the intermediate member and the ski than by the spring acting between the intermediate member and the shoe fastening means with respect to the first transverse axis.

The following detailed description of embodiments of the present invention, taken in conjunction with the accompanying drawings, are given by way of example only for a better understanding of the invention and are not to be construed as limiting the scope of the claims. It will be readily apparent to those skilled in the art from the following description, in conjunction with the accompanying drawings and the claims, of further advantageous embodiments and combinations of features which are still within the scope of the present invention.

Brief description of the drawings

Fig. 1.a

schematische Seiten-Teilansicht eines erläutenden Beispiels einer Skibindung, in einer Position mit abgesenkter Schuhferse;

Fig. 1.b

schematische Seiten-Teilansicht des Beispiels aus Figur 1.a in einer ersten Gelenk-Position mit angehobener Schuhferse;

Fig. 1.c

schematische Seiten-Teilansicht des Beispiels aus Figur 1.a in einer zweiten Gelenk-Position mit angehobener Schuhferse;

Fig. 2

perspektivische Detailansicht des Zwischenglieds gemäss dem in den Figuren 1.a bis 1.c dargestellten Beispiel;

Fig. 3.a

Seiten-Teilansicht einer ersten bevorzugten Ausführungsform der erfindungsgemässen Skibindung;

Fig. 3.b

Seiten-Detailansicht des Zwischenglieds gemäss der in Figur 3.a dargestellten Ausführungsform der Erfindung;

Fig. 3.c

schematische Seiten-Teilansicht der Ausführungsform aus Figur 3.a in einer ersten Gelenk-Position;

Fig. 3.d

schematische Seiten-Teilansicht der Ausführungsform aus Figur 3.a in einer zweiten Gelenk-Position;

Fig. 3.e

schematische Seiten-Teilansicht der Ausführungsform aus Figur 3.a in einer dritten Gelenk-Position;

Fig. 3.f

schematische Seiten-Teilansicht der Ausführungsform aus Figur 3.a in einer vierten Gelenk-Position;

Fig. 4.a

schematische Seiten-Teilansicht einer zweiten bevorzugten Ausführungsform der erfindungsgemässen Skibindung, in einer Position mitabgesenkter Schuhferse;

Fig. 4.b

schematische Seiten-Teilansicht der Ausführungsform aus Figur 4.a in einer ersten Gelenk-Position mit angehobener Schuhferse;

Fig. 4.c

schematische Seiten-Teilansicht der Ausführungsform aus Figur 4.a in einer zweiten Gelenk-Position mit angehobener Schuhferse;

Fig. 5.a

perspektivische Detailansicht des Zwischenglieds gemäss der in den Figuren 4.a bis 4.c dargestellten Ausführungsform der Erfindung;

Fig. 5.b

Querschnitt entlang der Linie A-A in der Figur 4.a.

The drawings illustrate illustrative examples for understanding the invention and preferred embodiments of the present invention.

Fig. 1.a

schematic partial side view of an illustrative example of a ski binding, in a position with lowered shoe heel;

Fig. 1.b

schematic partial side view of the example of Figure 1.a in a first joint position with raised shoe heel;

Fig. 1.c

schematic partial side view of the example of Figure 1.a in a second joint position with raised shoe heel;

Fig. 2

perspective detail view of the intermediate member according to the example shown in Figures 1.a to 1.c;

Fig. 3.a

Partial side view of a first preferred embodiment of the ski binding according to the invention;

Fig. 3.b

Side detail view of the intermediate member according to the embodiment of the invention shown in Figure 3.a;

Fig. 3.c

schematic partial side view of the embodiment of Figure 3.a in a first joint position;

Fig. 3.d

schematic partial side view of the embodiment of Figure 3.a in a second hinge position;

Fig. 3.e

schematic partial side view of the embodiment of Figure 3.a in a third hinge position;

Fig. 3.f

schematic partial side view of the embodiment of Figure 3.a in a fourth joint position;

Fig. 4.a

schematic partial side view of a second preferred embodiment of the inventive ski binding, in a position mitabgesenkter shoe heel;

Fig. 4.b

schematic partial side view of the embodiment of Figure 4.a in a first joint position with raised shoe heel;

Fig. 4.c

schematic partial side view of the embodiment of Figure 4.a in a second joint position with raised shoe heel;

Fig. 5.a

perspective detail view of the intermediate member according to the embodiment of the invention shown in Figures 4.a to 4.c;

Fig. 5.b

Cross section along the line AA in Figure 4.a.

Basically, the same parts are provided with the same reference numerals in the figures.

Ways to carry out the invention

Figures 1 and 2 represent a A ski binding with a cam 280. As a joint having more than one (rotational) degree of freedom between a shoe wearer 260 of the shoe attachment means and the ski top 210, the example shown in Figures 1 and 2 has a double-jointed device. The carrier 260 with a front sole clamp 270 is pivoted about a first transverse axis 230 to an intermediate member 240, which is hinged about a second transverse axis 220 pivotally mounted on a mounting part 250. As can be clearly seen in Figure 2, the intermediate member 240 in this example consists of a center plate which is in the lowered position of the binding substantially parallel to the ski top side, and two side parts, which are provided with holes for the pivot axes 220 and 230. The fastening part 250 can be fastened to the ski (not shown) by means of screws 252, 254. The plate-shaped fastening part 250 is behind the bearing for the second transverse axis 220, viewed in the longitudinal direction of the rear, extended. The top of this extension forms the mating surface 251, on which the convex curved surface 281 of the cam body 280 mentioned below is rolled. At the rear, essentially below the foot ball area of the ski boot (not shown) fastened on the shoe carrier 260, a rib 290 extending transversely to the longitudinal direction of the ski is formed on the fastening part 250.

On the carrier 260, a cam 280 is formed in its foremost region, which is formed as an integral part of the carrier 260. The cam body has on its underside a convex curved in the longitudinal direction surface 281, which defines a rolling / rolling curve, wherein the surface is formed transversely to the ski longitudinal direction straight.

In the example shown in FIGS. 1 and 2, the cam body 280 (and thus the carrier 260) is pivoted about the position of the toe of the ski boot fixed on the shoe wearer 260, pivotally about the transverse axis 230 on the intermediate member 240. The binding components are arranged such that the course of the joint movement between the shoe carrier 260 and the shoe and the ski during lifting of the shoe heel takes place in three phases.

In Figure 1.a, the binding is shown in the lowered shoe heel position, at the beginning of the first phase. In the first phase (repulsion phase) of the link articulation, the cam 280 is rolled on the rib 290 with the distance between the shoe heel and the support line 285 of the cam 280 (contact line between the convex surface 281 and the counter surface 251) remaining substantially constant. In the first phase, the skier exerts the greatest forces on the shoe and the binding on the weighted ski, so a small distance between the shoe heel and the bearing surface 285 of the cam and thus a small articulated lever is advantageous.

In the second binding movement phase (roll-off phase), the cam body 280, with its convexly curved surface 281, is rolled over on the counter surface 251 on further lifting of the shoe heel. Due to the articulated mounting of the cam 280 on the intermediate member 240, the rolling does not consist of a pure, slippery rolling movement, but of a combination of rolling / rolling and sliding. By this rolling movement, the distance between the shoe heel and the support line 285 of the cam 280 in the second phase increases continuously by the support line 285 of the cam 280 moves continuously on the counter surface 251 forward. In the second phase illustrated in FIG. 1.b, the forces to be exerted on the ski by the skier continuously decrease. The second phase is completed with the achievement of a first stop (not shown) for limiting the pivoting movement about the first transverse axis 230. The first stop blocks a continuation of the pivoting movement about the transverse axis 230.

If the joint movement between the shoe and the ski continues in the same direction, then in the third phase (swing phase) of the movement of the binding joint, the first transverse axis 230 is blocked by the first stop, whereby the joint movement only consists of a pivoting movement the second transverse axis 220 exists. At the end of the third phase, the touring skier shifts his weight to the other ski and begins to follow the skis that are essentially resting on the snow until then. When tightening and then pushing forward the relieved ski of the shoe or shoe attachment means with respect to the ski in a reverse joint movement is returned to the starting position.

FIGS. 3.a to 3.f show a first preferred embodiment of the invention which is similar to the example illustrated in FIGS. 1 and 2 and described above. The intermediate member 340 is made substantially shorter than the intermediate member 240 described above, and the transverse axis 330 is disposed in the region below the toe on the formed as an integral part of the shoe wearer 360 cam 380. Despite the arrangement of the transverse axis 330 in the area of the toe, the effect of the cam body 380 for the first phase of the movement sequence approximates a fulcrum in the footpad area and thus an ergonomic sequence of movements.

In addition to the first stop for limiting the pivoting movement about the first transverse axis 330 (analogously to the example described in FIGS. 1 and 2), in the first embodiment described in FIGS. 3.a to 3.f the invention for limiting the pivoting movement about the first transverse axis in the reverse direction, a second stop provided so that a pivoting in the direction of lowering the heel on the joint position when lowered shoe is made impossible. This prevents that the double joint in the downhill position of the binding of an upward force of the toe, as it may arise, for example when skiing with reserve, undesirably yielding. However, the blocking of the pivoting movement about the first transverse axis 330 by the second stop may also be useful in the ascent position of the binding, for example when carrying out step steps or hairpin bends in ascent. To form the second stop for the first transverse axis 330, a projection is formed on the cam body 380, which pushes in the binding position with lowered shoe heel with its front side 382 against a correspondingly shaped rear side 342 of the intermediate member 340.

In Figures 3.c-3.f, the embodiment of the invention shown in Figure 3.a is shown in various joint positions - i. with raised to different heights shoe heel - shown. In Figure 3.c the binding in the position mitabgesenkter shoe heel, at the beginning of the movement sequence for a rise step, is shown. The intermediate member 340 is raised at the end with the first transverse axis 330 upwards, and its rear side 342 abuts against the correspondingly shaped front side 382 on a cam formed on the cam 380 and thereby forms a stop for limiting the pivoting movement about the first transverse axis 330, a Pivoting in the direction of lowering the heel over the joint position with the shoe lowered - or a lifting of the ski boot in the area of the toe - is made impossible. When lifting the heel (Figures 3.d to 3.e), the support line 385 of the cam body 380 moves on the mounting member 350 continuously forward, at the same time the intermediate member 340 is first lowered in the region of its first transverse axis 330 and later raised again. Overall, this embodiment of the invention provides a round, ergonomic movement.

In contrast to the example described above, in the case of the first preferred embodiment shown in FIGS. 3.a to 3.f, no rib is formed on the end of the fastening part 350. This eliminates in this embodiment, the above-mentioned repulsion phase of the binding movement sequence.

However, it is also an alternative embodiment possible, which has all the features of the embodiment shown in Figures 3.a to 3.f and has to provide a three-phase movement sequence, for example, the figures 1.a - 1.c analog transverse rib. As a further alternative (both for example of FIGS. 1.a-1.c and for the embodiment of FIGS. 3.a to 3.f), the transverse rib may be formed on the cam body itself instead of on the mating surface opposite the cam body. without significantly changing the function and purpose of the cross rib.

FIGS. 4 and 5 show a second preferred embodiment of the invention which is similar to the example shown in FIGS. 1 and 2 and the first preferred embodiment shown in FIGS. 3 a to 3 f.

As a joint between the shoe wearer 460 of the shoe attachment means and the ski upper side 410, the embodiment of the invention shown in FIGS. 4 and 5 again has a double joint-like device: the support 460 with a front sole-down restraint 470 is pivotably connected to an intermediate member 440 about a first transverse axis 430 , which is hinged about a second transverse axis 420 pivotally mounted on a mounting part 450.

As can be seen in Figure 5.a, the one-piece intermediate member 440 in the third preferred embodiment of the invention consists of a central plate-shaped land portion 445 and two plate-shaped lateral leg portions 444, 446. The plates of the two leg portions 444, 446 are approximately rectangular arranged to the plate of the web section 445. The leg portions 444, 446 are provided with holes 448.1 - 448.4 for the pivot axes 420 and 430. Approximately in the middle between the two leg portions 444, 446, a cam 447 is integrally formed on the web portion 445 on the front side with respect to the longitudinal direction of the ski, which is designed to receive the compression spring 425 described below.

The one-piece fastening part 450 can be fastened with screws on the ski. The fastening part 450 is behind the bearing for the second transverse axis 420, viewed in the ski longitudinal direction, extended to the rear plate-shaped. At the side edges of the top of this plate-shaped extension 453, the counter surfaces 451.1 - 451.4 are formed, on which the following mentioned convex curved surfaces 481.1 - 481.4 of the cam 480 are rolled.

On the support 460, a cam 480 is formed in its foremost region, which is formed as an integral part of the support 460. On the side edges of the underside of the cam 480, four curved surfaces 481.1 - 481.4 are formed, which define a rolling / rolling curve.

In contrast to the embodiments described above, in the embodiment of the invention shown in FIGS. 4 and 5, the curved surface of the cam 480 and the corresponding mating surface on the top of the mounting member 450 do not each consist of a single continuous surface, but they are each divided into four subareas 481.1 - 481.4 and 451.1 - 451.4. This is best seen in the cross section of Figure 5.b. Two curved partial surfaces 481.1, 481.2 of the cam 480 are arranged such that they form a step running along the one side edge of the cam 480. By the two mating surfaces 451.1, 451.2 a corresponding step on the corresponding longitudinal edge on the upper side of the plate-shaped extension 453 of the fastening part 450 is formed. The two stages act together when rolling the cam 480 on the plate-shaped extension 453 such that the cam 480 is guided in the longitudinal direction on one side. On the other side of the cam body 480, two further curved surfaces 481.3, 481.4 are arranged such that they form a further step running along the other side edge of the cam body 480. Similarly, by the two other mating surfaces 451.3, 451.4 a corresponding step formed on the corresponding other longitudinal edge on the upper side of the plate-shaped extension 453 of the fastening part 450, wherein the two stages in turn cooperate when rolling the cam 480 on the plate-shaped extension 453 such that the cam body 480 is guided on one side in the longitudinal direction. Overall, the plate-shaped extension 453 thus serves as a guide rail for longitudinal guidance of the cam 480, when the latter is rolled on the top of the plate-shaped extension 453 of the fastening part 450.

Further, the central part of the top of the plate-shaped extension 453 is provided with a groove-shaped recess 455, which is arranged in the longitudinal direction of the ski. The longitudinal channel 455 on the one hand provides space for the foremost part of the shoe wearer 460 and the lowermost part of the sole support 470, when these parts are moved downwards during the movement of the joint between the shoe wearer 460 or the shoe and the ski when lifting the heel of the shoe. On the other hand, the channel also serves to carry away snow which, when walking with the ski binding, penetrates into the joint area and the area between the shoe carrier 460 and the ski upper side 410. The channel 455 is designed in such a way that any snow which has penetrated into the binding region is transported back through the channel 455 through the groove 455 due to the joint movement through the correspondingly formed front part of the shoe carrier 460 and / or the sole lower holder 470.

In Figure 4.a, the binding is shown in the position mitabgesenkter shoe heel. FIG. 4.b shows the binding in a position in which the shoe wearer 460 encloses an angle of approximately 60 degrees with respect to the ski upper side 410. In the position shown in Figure 4.c, the shoe carrier 460 has been moved by more than 90 degrees from the horizontal position.

Analogous to the first preferred embodiment of the invention described in FIGS. 3.a to 3.f, in the second preferred embodiment of the invention described in FIGS. 4 and 5, a stop is again provided for limiting the pivoting movement about the first transverse axis 430 in the reverse direction. which corresponds to the second stop described above. The projection, which in accordance with the second embodiment of the invention with its front side 382 abuts against a correspondingly shaped rear side 342 of the intermediate member 340, in the third embodiment of the invention corresponds to a projection which abuts with its front side 482 against a correspondingly shaped rear side 442 of the intermediate member 440 ,

In the illustrated in Figures 4 and 5 second preferred embodiment of the invention, however, a corresponding stop the first stop in the embodiments of the invention described above, which would block the continuation of the pivotal movement about the transverse axis 430 in a certain position. Rather, even the sole-downholder 470 is designed such that its front-side outer side defines a convexly curved contour line. As a result, with a very large deflection of the shoe wearer from the rest position, as shown, for example, in FIG. 4 c, the sole depressor 470 acts as a continuation and cam body and controls the joint movement by rolling it on the fastening part 450. In the ascent position, despite the lack of a first stop, sufficient stability of the binding to facilitate e.g. To ensure when performing step steps or switchbacks, according to the second embodiment of the invention, two springs 425, 435 are arranged on the binding.

The tension spring 435 (also called climbing spring) is attached on the one hand to the intermediate member 440 - concretely on the inside of the leg portion 446 of the intermediate member 440 - and on the other hand to a longitudinal outer side of the cam 480. The tension spring 435 thus counteracts the pivoting movement about the first transverse axis 430 when lifting the shoe heel and prevents the rear ski end from hanging down when the skier lifts the ski boot together with the ski attached via the binding to it.

The compression spring 425 is disposed between the front portion of the mounting portion 450 and the intermediate member 440 and counteracts the pivotal movement about the second transverse axis 420 such that the intermediate member 440 is pressed down about the second pivot axis 420 toward the ski top 410. The compression spring 425 is received on the member side by the cam 447 formed on the front side of the intermediate land portion 445.

The two springs 425, 435 are designed and arranged such that a greater torque is exerted by the compression spring 425 with respect to the second pivot axis 420 than by the tension spring This ensures that during the entire joint movement, which is carried out substantially between the shoe carrier 460 and the mounting plate 450, formed as an integral part of the shoe wearer 460 cam 480 always on the plate-shaped extension 453 of the fastening part 450th is rolled and the joint movement is thus controlled by the cam.

In order to prevent that upon relief of the heel part of the shoe wearer 460, the intermediate member 440 pressed by the compression spring 425 about the second pivot axis 420 down to the ski top 410 and thereby due to the convex curvature of the cam 480, the heel part of the shoe wearer 460 from the ski top 410 away, the pivot joint defined by the second pivot axis 420 is configured and arranged to oppose substantial friction of any pivotal movement about the second pivot axis. In contrast, the swivel joint defined by the first pivot axis 430 is formed as frictionless as possible in order to achieve a smooth joint movement of the ski binding when ascending.

Overall, the embodiment of the invention shown in Figures 4 and 5 provides an even rounder and more ergonomic movement than the embodiments of the invention described earlier.

In a further embodiment of the invention, not shown in the drawings, the cam body is arranged not on the shoe attachment means, but on the ski upper side, the convexly curved surface lying on top of the cam body. The rolling process then takes place between this convexly curved surface and a mating surface which lies either on the underside of the shoe fastening means or of the ski boot.

In a further variant of the invention, not only the cam body, but also the counter surface is curved in the ski longitudinal direction. The rolling curve then results from the rolling of a curved surface on another curved surface.

As an alternative to the shoe fastening means according to the embodiments presented so far, which comprise a shoe carrier and sole-down holder, in a further embodiment of the invention the shoe fastening means may e.g. Include in the ski boot sole bearing bushes which can engage which corresponding pin on the intermediate member.

In a further embodiment of the invention may be provided for friction reduction between the cam and the mating surface on which the convex curved surface of the cam is rolled, a rolling or sliding device. Thus, for example, be provided below the cam body, a roller carriage or a slide, the upper side forms the counter surface on which the convex surface of the cam is passed without slipping, which simultaneously moves the roller carriage. Instead of a rolling carriage may also be provided a series of rollers on the counter surface, on which the cam is rolled off. As a variant, the rollers can also along the convex curved curve line of the cam body be arranged and be rolled on the non-displaceable counter surface.

In another embodiment, the cam is attached to the shoe attachment means or the ski top by means of a push joint. To avoid sliding between the convex curved surface of the cam and the mating surface of the cam body is displaceable along the sliding joint during rolling between the cam and counter surface of the cam.

As a further variant, the cam body may be pivotally mounted about a further transverse axis on the shoe attachment means or the ski upper side to avoid sliding between the convexly curved surface of the cam body and the counter surface.

In summary, it should be noted that a touring binding is provided by the invention, which allows an ergonomic, the anatomy of the human body corresponding movement during walking and especially when climbing with skis. Above the ankle for the skier, even when using a ski boot with a stiff shoe sole, the result is a similar movement as when walking or walking with a running shoe with a soft sole.

Claims (13)

1. A ski binding with boot fastening means (260, 270; 360, 370; 460, 470; 660, 670; 760, 770) which are hinged onto the ski, the boot fastening means (260, 270; 360, 370; 460, 470) being hinged, so as to be pivotable about a first transverse axis (230; 330; 430), on an intermediate member (240; 340; 440) which is hinged onto the ski so as to be pivotable about a second transverse axis (220; 320; 420), which second transverse axis (220; 320; 420), when the boot is lowered in the downhill position, is arranged in front of the toe of the boot when viewed in the longitudinal direction of the ski, and with a cam body (280; 380; 480; 680; 780) controlling the hinged movement between the boot fastening means (260, 270; 360, 370; 460, 470; 660, 670; 760, 770) and the ski for a non-jerky motion when ascending and having a convex curved surface (281; 381; 481; 681; 781) at least in one region in the longitudinal direction of the ski, characterized by a stop (382, 342) for the first transverse axis, which stop, both in an ascending position and also in a downhill position of the ski binding, disables the pivoting movement about the first transverse axis (330) in the direction of lowering of the boot heel beyond the relative articulation position of intermediate member to boot fastening means as it occurs with the boot lowered in the downhill position.
2. A ski binding according to claim 1,
   characterized in that when the boot is lowered the cam body (280; 380; 460; 680; 780) is arranged in a region between boot and ski, in front of the centre of the boot when viewed in the longitudinal direction of the ski.
3. A ski binding according to claim 1 or 2, characterized in that the cam body (280; 380; 480; 680; 780) is so formed and arranged that at least in one phase of the hinged movement the cam body (280; 380; 480; 680; 780) is rolled off in such a way that the distance between the heel of the boot and the bearing line (285; 385; 485, 685; 785) of the cam body (280, 380; 480; 680; 780) increases as the lifting of the boot heel increases.
4. A ski binding according to any one of claims 1 to 3, characterized in that for longitudinal guiding of the cam body (480) during the hinged movement the cam body (480) is provided with at least two stepped surfaces (481.1, 481.2, 481.3, 481.4).
5. A ski binding according to any one of claims 1 to 4, characterized in that the cam body (280; 380; 480; 680; 780) is so arranged on the boot fastening means (260, 270; 360, 370; 460, 470; 660, 670; 760, 770) and/or on the binding parts attached to the boot that when the boot is lowered the convex curved surface (281; 381; 481; 681; 781) lies on the underside of the cam body (280; 380; 480; 680; 780).
6. A ski binding according to claim 5, characterized in that on the ski and/or on the binding parts attached to the ski a rib (290) is arranged beneath the cam body (280), transversely to the longitudinal direction of the ski, such that at least in one phase of the hinged movement the cam body (280) is rolled off on the rib (290), the distance between the heel of the boot and the bearing line (285) of the cam body (280) remaining substantially constant as the lifting of the boot heel increases.
7. A ski binding according to any one of claims 1 to 6, characterized in that the cam body (280; 380; 480; 680; 780) is constructed as part of the boot fastening means (260, 270; 360, 370; 460, 470; 660, 670; 760, 770).
8. A ski binding according to claim 7, characterized in that the boot fastening means (260, 270; 360, 370; 460, 470; 660, 670; 760, 770) comprise a support (260; 360; 460; 660; 760) on which the ski boot is fastenable, the cam body (280; 380; 480; 680; 780) being formed as the front part of this support (260; 360; 460; 660; 760).
9. A ski binding according to any one of claims 1 to 8, characterized by a spring (435) which acts between the intermediate member (440) and the boot fastening means (460) and is formed and arranged such that it opposes a pivoting movement of the boot fastening means (460) about the first transverse axis (430) in the direction of increasing lifting of the boot heel.
10. A ski binding according to any one of claims 1 to 9, characterized by a spring (425) which acts between the intermediate member (440) and the ski and is formed and arranged such chat it opposes a pivoting movement of the intermediate member (460) about the second transverse axis (420) in the direction of an increasing angle between the ski and the intermediate member (440).
11. A ski binding according to claim 9 and 10, characterized in that the two springs (425, 435) are formed and arranged such that a greater torque is exerted by means of the spring (425) acting between the intermediate member (440) and the ski with respect to the second transverse axis (420) than by means of the spring (435) acting between the intermediate member (440) and the boot fastening means (460) with respect to the first transverse axis (430).
12. A ski binding according to any one of claims 1 to 11, characterized in that when the boot is lowered the first tranverse axis (230; 330; 430) is arranged behind the toe of the boot when viewed in the longitudinal direction of the ski.
13. A ski binding according to any one of claims 1 to 12, characterized by the formation and arrangement of the cam body (280; 380; 480; 680) such that the rolling off process between the convex curved surface (281; 381; 481; 681) and a complementary surface consists of rolling off combined with sliding.

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