EP4106892B1 - Skis with anti-slip device - Google Patents

Description

The invention relates to a ski with means for reducing backward sliding.

Skis, especially cross-country skis, with anti-slip protection are generally known. Cross-country skis can have scales in a central area of the ski, which are intended to prevent the ski from sliding back when the cross-country skier pushes off. It is also known to apply grip waxes or skins to the cross-country skis, which are intended to prevent the ski from sliding back.

So-called climbing skins are used to prevent slipping, particularly on touring skis. They are intended to prevent the skis from slipping backwards when climbing, but at the same time they should allow them to slide forward.

A major disadvantage of known anti-slip devices is that their effectiveness depends very much on the current subsurface conditions and the temperature. Especially on icy surfaces, known anti-slip devices have relatively little effect and can only inadequately prevent undesirable back-sliding. In addition, known anti-slip devices also impair the sliding behavior of the ski in the direction of travel, which is fundamentally undesirable.

The publication WO 2014/118399 A1 reveals a anti-slip device for a ski.

The publication US 2020/0086201 A1 discloses a ski with a structure integrated into the tread with a plurality of deformable elements to prevent the ski from sliding back.

Proceeding from this, it is the object of the invention to provide a ski which has effective anti-slip protection and at the same time shows good sliding properties in cases in which no anti-slip protection is necessary.

The task is solved by a ski with the features of independent claim 1. Preferred embodiments are the subject of the subclaims.

According to one aspect, the invention relates to a ski. The ski comprises a ski base body with a sliding surface and a binding part to which a skier's shoe can be attached. The binding part is, for example, a commercially available cross-country ski binding or touring ski binding. The binding part is fixed to the ski base body so that it can move in the longitudinal direction. This allows the binding part to be moved between a first and second sliding position in the longitudinal direction of the ski. At least one control surface is provided on the binding part or a functional part connected to the binding part, which interacts at least indirectly with at least one mandrel that is displaceably mounted in the ski base body. In particular, the mandrel rests against the control surface with its free end facing away from the sliding surface. The interaction is in particular such that the at least one mandrel can be moved, in particular displaced, by the displacement of the binding part. This displacement is caused in particular by the action of the control surface on the free end of the at least one mandrel. The at least one mandrel is positioned in a first, front sliding position of the binding part in a pushed-back position in which the free end of the mandrel does not protrude beyond the sliding surface, ie the free end of the mandrel is inserted into the ski base body. The control surface interacts at least indirectly with the mandrel in such a way that when the binding part is moved relative to the ski base body from the first, front sliding position into a second, rear sliding position, for example when the skier pushes off, the mandrel is positioned in an advanced position the free end over the sliding surface protrudes to prevent the ski from sliding back during the push-off movement by reaching into the ground.

The technical advantage of the ski is that it creates anti-slip protection, which is activated during the normal movement of the skier when pushing off and is deactivated when the ski is then pulled forward and can therefore be operated intuitively. The ski also offers effective anti-slip protection, which has an effective anti-slip effect on different surface conditions, especially when there is heavy icing.

According to one embodiment, the mandrel is positioned into the pushed-back position by means of a spring. This ensures that the mandrel is inserted into the ski without external force, which can occur, for example, as a result of a push-off movement by the skier, i.e. the anti-slip protection is deactivated.

The spring loading of the mandrel can be done in different ways. The mandrel can thus be directly spring-loaded by a spring acting directly on the mandrel. For example, the spring can be a compression spring that acts between the ski and the mandrel. For example, it can run circumferentially around the mandrel.

Alternatively, the mandrel can also be indirectly spring-loaded, ie the spring does not act directly on the mandrel, but rather via an intermediate element. For example, the spring itself can engage the displaceable binding part and hold the binding part in the first, front sliding position without external force. In order to be able to move the mandrel in both directions, a positive connection can be provided between the binding part or a functional part connected to the binding part and the mandrel. For example, in the area of Control surface can be provided with a positive guide for the mandrel, which at least partially surrounds the mandrel on the free end, for example. Due to the positive connection, the mandrel is positioned either in the pushed-back position or the advanced position, depending on the sliding position of the binding part.

It is also conceivable that both a spring acting directly on the mandrel and a spring acting on the binding part are provided.

It should be noted that it is possible to completely dispense with the spring loading of the mandrels and/or the binding part, so that the activation and deactivation of the anti-slip protection takes place solely through forces applied by the skier. However, the positive guidance described above should be provided for at least one mandrel in the area of the control surface.

According to one exemplary embodiment, the control surface is an inclined plane which is displaced translationally when the binding part is displaced in the longitudinal direction of the ski base body. By displacing the control surface, the at least one mandrel is displaced along its longitudinal axis, from the pushed-back position in which the mandrel is positioned due to its spring loading, into an advanced position. As a result, a sliding movement of the binding part along the longitudinal axis of the ski can be implemented in a sliding direction of the mandrels that runs transversely to this longitudinal axis and is directed downwards.

According to one embodiment, the control surface is provided directly on the binding part itself or on a functional part detachably attached to the binding part. The functional part can, for example, be an insert coupled to the binding part, which can be removed separately To be able to carry out maintenance and repair work on the anti-slip device, especially on the thorns.

According to one exemplary embodiment, the control surface is an inclined plane which forms an acute angle with the sliding surface of the ski, which opens against the direction of travel of the ski, i.e. towards the back of the ski. As a result, a horizontal sliding movement of the binding part can be converted into an obliquely downward sliding direction of the mandrels.

According to one exemplary embodiment, the control surface forms an angle with the sliding surface in the range between 10° and 60°, for example between 15° and 45°, preferably between 25° and 35°, in particular between 28° and 32°. The choice of these angles has an advantageous effect on the triggering time of the anti-slip protection when the skier pushes off and also leads to a high level of functional reliability.

According to one exemplary embodiment, the longitudinal axis of the at least one mandrel runs obliquely to the sliding surface, in such a way that the longitudinal axis of the at least one mandrel forms an acute angle with the sliding surface of the ski, which opens in the running direction of the ski, i.e. towards the front of the ski. This inclination of the at least one mandrel causes it to push backwards obliquely out of the sliding surface and thereby has an advantageous effect against the ski sliding back.

According to one embodiment, the longitudinal axis of the at least one mandrel forms an angle with the sliding surface in the range between 30° and 80°, for example between 45° and 75°, preferably between 55° and 65°, in particular between 58° and 62° a. This inclined position of the at least one mandrel is advantageous because a particularly effective anti-slip protection is achieved while at the same time safely pushing out the mandrels, which is coordinated with the movement of the skier.

According to one exemplary embodiment, at least two mandrels are provided, which are arranged one behind the other when viewed in the longitudinal direction. In this way, an advantageous anti-slip protection can be achieved, which also leads to the least possible weakening of the ski.

According to one embodiment, the longitudinal axes of the at least two mandrels run parallel to one another. This means that the spines in the ski are similarly oriented and engage the ground in the same direction. In addition, the mandrels can be controlled with an identically designed sliding gate in the form of identically oriented control surfaces.

According to one embodiment, the mandrels are provided centrally or substantially centrally in the ski with respect to the transverse direction of the ski. As a result, the mandrels come to lie one behind the other in the longitudinal direction of the ski, which offers advantages in terms of integrating the mandrels into the ski.

According to one exemplary embodiment, at least two mandrels are arranged laterally offset from one another when viewed in the longitudinal direction of the ski. This allows a compact integration of the anti-slip protection into the ski.

According to one embodiment, the binding part is slidably guided in a rail attached to the ski base body. This creates a sliding guide for the binding part, so that the binding part slide slightly backwards when the skier pushes off and so that the anti-slip protection can be activated.

According to one exemplary embodiment, the binding part is designed to be moved from a front position to a rear position that is shifted counter to the running direction when the skier pushes off. As a result, the anti-slip protection is activated by the skier's normal movement.

According to one embodiment, the displacement path of the binding part is less than 5cm, preferably less than 3cm. This means that the ski's sliding back can be effectively reduced with a very small displacement path that is hardly noticeable to the skier.

The ski can be a cross-country ski or a touring ski.

The free end of the mandrel that protrudes from the ski in the advanced position can be bolt-like and, for example, conical or tapered. Alternatively, the free end of the mandrel can form a flat, for example plate-shaped or spade-like section, which runs transversely to the running direction, so that a large-area intervention in the snow can be achieved. This can be particularly advantageous for touring skis.

For the purposes of the invention, the expressions “approximately”, “essentially” or “approximately” mean deviations from the exact value by +/- 10%, preferably by +/- 5% and/or deviations in the form of changes that are insignificant for the function .

Further developments, advantages and possible applications of the invention also emerge from the following description Embodiments and from the figures.

Fig. 1

beispielhaft eine Draufsichtdarstellung auf eine Skibindung von oben;

Fig. 2

beispielhaft einen Längsschnitt durch die Skibindung entlang der Schnittlinie A-A gemäß Fig. 1, wobei sich der die Dorne bewegende Bindungsteil in der vorderen Schiebeposition befindet und damit die Dorne in den Skigrundkörper eingeschoben sind; und

Fig. 3

beispielhaft einen Längsschnitt durch die Skibindung entlang der Schnittlinie A-A gemäß Fig. 1, wobei sich der die Dorne bewegende Bindungsteil in der hinteren Schiebeposition befindet und damit die Dorne aus dem Skigrundkörper abschnittsweise herausgeschoben sind.

The invention is explained in more detail below using several figures of exemplary embodiments. Show it:

Fig. 1

an example of a top view of a ski binding from above;

Fig. 2

For example, a longitudinal section through the ski binding along the section line AA Fig. 1 , whereby the binding part that moves the mandrels is in the front sliding position and the mandrels are therefore pushed into the ski base body; and

Fig. 3

For example, a longitudinal section through the ski binding along the section line AA Fig. 1 , whereby the binding part that moves the mandrels is in the rear sliding position and the mandrels are therefore pushed out in sections from the ski base body.

Figure 1 shows, by way of example and schematically, a top view of a section of a ski 1, on which a binding part 4 is provided. The ski 1 has a ski base body 2 with a sliding surface 3 in a known manner. The ski 1 can be, for example, a touring ski or a cross-country ski, in particular a cross-country ski for classic cross-country skiing. The ski 1 has a running direction LR, as shown in Fig. 1 is shown The educational part 4 has fixing means to which a skier's shoe can be secured. In particular, the fixing means are designed in such a way that they interact with corresponding fixing means provided on the front of the shoe, so that a detachable connection is created between the skier's shoe and the ski.

The binding part 4 is held displaceably on the ski base body 2 in such a way that the forming part 4 can be moved in the longitudinal direction of the ski 1 relative to the ski base body 2. This allows the binding part 4 on the ski 1 to be moved between a front position and a rear position. In order to enable the binding part 4 to be displaceable, one or more rails can be provided on the top side of the ski base body 2, which run in the longitudinal direction LR of the ski 1. The binding part 4 can, for example, be guided in a form-fitting manner in this at least one rail.

As in the sectional view of the Figures 2 and 3 To see, the binding part 4 is designed to move the mandrels 6, 6 'from a pushed back position, as shown in Figure 2 is shown in an advanced position as shown in Figure 3 is shown to bring.

The mandrels 6, 6 'can be slidably guided in sliding sleeves which are inserted into the ski base body 2.

The mandrels 6, 6' form anti-slip protection, ie when the skier pushes off, they are activated and thereby penetrate into the ground, ie ice or snow located under the ski, in order to prevent the ski 1 from sliding back. When the ski is subsequently tightened, the mandrels 6, 6' are pushed back into the pushed back position positioned so that they no longer interfere with the snow or ice.

To move the mandrels 6, 6', the binding part 4 has at least one control surface 5, by means of which the sliding movement of the binding part 4 is converted into a displacement movement of the mandrels 6. Since two mandrels 6 are provided in the exemplary embodiment shown, the binding part 4 also has two control surfaces 5, one per mandrel 6, 6 '.

The control surface 5 can either be provided directly in the binding part 4, or on a functional part that is connected to the binding part 4. In the exemplary embodiment shown, a functional part 4.1 is inserted into the binding part 4. This functional part 4.1 can, for example, be detachably connected to the binding part in order to be able to remove the functional part 4.1 and thus be able to service the anti-slip mechanism. The functional part 4.1 can be held or secured in the binding part 4, for example by one or more screws.

We in the Figures 2 and 3 As can be seen, the control surface 5 runs obliquely to the sliding surface 5. As a result, the sliding movement of the binding part 4 can cause the mandrels 6, 6 'to be pushed out. The control surface 5 runs, for example, at an acute angle α obliquely to the sliding surface 3. This angle α opens towards the rear against the running direction LR of the ski 1. The angle α can have a size between 10° and 60°, for example between 15° and 45°, preferably between 25° and 35°, in particular between 28° and 32°.

The bolts 6, 6' preferably run at right angles to the control surface 5. The longitudinal axes of the bolts 6, 6' each form an angle β between 30° and 80°, for example between 45° to 75°, preferably between 55° and 65°, in particular between 58° and 62° with the sliding surface 3, the angle β opening in the running direction LR of the ski 1.

As in Fig. 2 and 3 You can see that the mandrels 3 are pretensioned into the inserted position by means of a spring 7, in which the free ends 6.1, 6.1' of the mandrels 6, 6' do not protrude beyond the sliding surface 3. The spring force of the spring 6 is preferably also selected such that without the action of external forces, for example forces of the skier applied to the binding part 4, the binding part 4 is positioned in the advanced position, as in Fig. 2 is shown. The free ends opposite the free ends 6.1, 6.1' rest on the control surfaces of the binding part 4

We now the binding part 4, as in Fig. 3 indicated by the arrow, displaced in the longitudinal direction of the ski, the control surfaces 5 are displaced relative to the bolts 6, 6 ', as a result of which the free ends 6.1, 6.1' of the bolts 6, 6' are pushed out of the ski base body 2, so that the free ones Ends 6.1, 6.1' protrude from the sliding surface 3. This causes the mandrels 6, 6' to engage in the snow or ice located below the sliding surface 3 and thereby prevent the ski 1 from sliding back when the skier pushes off.

If there is no longer any force applied to the binding part 4 against the running direction LR or when the ski is pulled or glided, the binding part 4 is returned to the in Fig. 2 shown front sliding position, whereby the mandrels 6, 6 'are positioned back into the retracted position by their spring loading.

In the exemplary embodiment shown, the mandrels 6, 6' are arranged centrally or substantially centrally as seen in the transverse direction of the ski. The mandrels 6, 6' are preferably provided one behind the other in the longitudinal direction of the ski.

It goes without saying that the mandrels 6, 6' can also be provided next to one another in the transverse direction of the ski 1. Furthermore, it is understood that the variant shown here with two mandrels 6, 6' is merely an example and only one mandrel 6 or more than two mandrels 6, 6' can be provided.

A safety mechanism can preferably be provided, by means of which the binding part 4 can be locked in the front sliding position, so that the anti-sliding mechanism is deactivated. The securing mechanism can, for example, be coupled to the locking device of the skier's shoe, in such a way that locking the shoe on the binding part unlocks the anti-slip device (i.e. the binding part can be moved and thus push the mandrels out of the ski). In the opposite case, by unlocking the shoe on the binding part, the anti-slip protection can be locked (i.e. the binding part can no longer be moved into the second, rear sliding position and thus the pins can no longer be pushed out of the ski).

The invention has been described above using exemplary embodiments. It is understood that numerous changes and modifications are possible without departing from the scope of protection defined by the patent claims.

Reference symbol list

1

ski

2

Ski base body

3

sliding surface

4

Binding part

5

control surface

6, 6'

mandrel

6.1, 6.1'

free ending

7

Feather

LA

Longitudinal axis of the ski

LR

Running direction

α

angle

β

angle

Claims (15)

1. Ski comprising a ski main body (2) having a sliding surface (3) and a binding part (4) to which a skier's boot can be fastened, wherein the binding part (4) is fixed on the ski main body (2) so as to be movable in the longitudinal direction (LR), wherein at least one control surface (5) which interacts at least indirectly with at least one spike (6, 6') that is movably mounted in the ski main body (2) is provided on the binding part (4) or on a functional part connected to the binding part (4), wherein the spike (6, 6'), in a first forward push position of the binding part (4), is positioned in a pushed-back position in which the free end (6.1, 6.1') of the spike (6, 6') does not project beyond the sliding surface (3), and the control surface (5) interacts at least indirectly with the spike (6, 6') in such a way that, when the binding part (4) is moved relative to the ski main body (2) from the first, forward push position to a second, rearward push position, the spike (6, 6') is positioned in a pushed-forward position in which the free end (6.1, 6.1') projects beyond the sliding surface (3), wherein the longitudinal axis of the at least one spike (6, 6') runs at an angle to the sliding surface (3) in such a way that the longitudinal axis of the at least one spike (6, 6') forms with the sliding surface (3) of the ski (1) an acute angle (β) which opens in the running direction (LR) of the ski (1).
2. Ski according to claim 1, characterized in that the spike (6, 6') is positioned in the retracted position by means of a spring (7).
3. Ski according to claim 2, characterized in that the spike (6, 6') is directly spring-loaded by a spring (7) acting directly on the spike (6, 6') or in that the spike (6, 6') is indirectly spring-loaded by a spring acting on the binding part (4) and a forced guidance of the spike (6, 6') in the area of the control surface (5).
4. Ski according to any one of the preceding claims, characterized in that the control surface (5) is an inclined plane which is translationally displaced during the movement of the binding part (4) in the longitudinal direction (LR) of the ski main body (2).
5. Ski according to any one of the preceding claims, characterized in that the control surface (5) is provided directly on the binding part (4) itself or on a functional part detachably fastened to the binding part (4).
6. Ski according to any one of the preceding claims, characterized in that the control surface (5) is an inclined plane which forms, with the sliding surface (3) of the ski (1), an acute angle (α) that opens against the running direction (LR) of the ski.
7. Ski according to claim 6, characterized in that the control surface (5) forms with the sliding surface (3) an angle (α) in the range between 10° and 60°, for example between 15° and 60°, preferably between 25° and 35°, in particular between 28° and 32°.
8. Ski according to any one of the preceding claims, characterized in that the longitudinal axis of the at least one spike (6, 6') forms with the sliding surface (3) an angle (β) in the range between 30° and 80°, for example between 45° and 75°, preferably between 55° and 65°, in particular between 58° and 62°.
9. Ski according to any one of the preceding claims, characterized in that at least two spikes (6, 6') are provided which are arranged one behind the other when viewed in the longitudinal direction (LR).
10. Ski according to claim 9, characterized in that the longitudinal axes of the at least two spikes (6, 6') run parallel to one another.
11. Ski according to claim 9 or 10, characterized in that the spikes (6, 6') are provided centrally or substantially centrally in the ski with respect to the transverse direction of the ski.
12. Ski according to any one of the preceding claims, characterized in that at least two spikes (6, 6') are arranged laterally offset from one another when viewed in the longitudinal direction (LR) of the ski.
13. Ski according to any one of the preceding claims, characterized in that the binding part (4) is movably guided in a rail which is fastened to the ski main body (2).
14. Ski according to any one of the preceding claims, characterized in that during a push-off movement of the skier the binding part (4) is designed to be moved against the running direction (LR) from a forward push position to a rearward push position.
15. Ski according to any one of the preceding claims, characterized in that the ski is a cross-country ski or a touring ski.

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