EP3120903B1 - Heel unit - Google Patents

Description

Technical area

The invention relates to an automatic heel unit for a ski binding, in particular a touring ski binding comprising a heel holder with a holding device for holding a ski boot in a heel area of the ski boot, wherein the automatic heel unit has a holding configuration in which the holding device is in a holding position and with the heel area of the ski boot Skiboot held in the ski binding can cooperate such that the heel area of the ski boot is held down in a lowered position. The holding device comprises two holding means each having a holding element for holding the ski boot in the heel region of the ski boot, wherein the two holding means are movable relative to each other, whereby a distance between the two holding elements is variable, wherein the two holding elements in the holding position of the holding device in a holding distance to each other. Furthermore, the holding device comprises a transmission element for interacting with the two holding means, wherein the transmission element is movable relative to the two holding means, and a prestressable elastic element, by the bias voltage in the prestressed state, a first force can be generated, with which the elastic element on the transmission element acts to bias the transmission element in a first direction, whereby the two holding elements are biased to their holding distance.

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 in which the ski boot is pivotable about an axis in Skiquerrichtung pivotally in the heel area of the ski to allow for joint movement between the ski boot and the ski to go.

Touring ski bindings, in turn, can be divided into two types. The first type comprises a ski boot carrier pivotable relative to the ski, on which the ski boot is held by binding jaws. A representative member of this type of touring ski bindings is, for example, in EP 0 754 079 B1 (Fritschi AG). The second type, however, relies on ski boots with a stiff sole. In these touring ski bindings, the ski boot is pivotally mounted in his toe area in a skim-mounted front automat. In this case, the automatic heel unit is also fixed in a distance from the front automat on the ski adapted to a ski boot sole length and locks the ski boot in the heel area in the downhill position. In the ascent position, the heel of the ski boot is released from the heel unit, so that the ski boot can be lifted off the ski and swiveled around the storage on the front automat. For this type of binding suitable ski boots this typically have in the toe area two lateral recesses for pivotal mounting in the front vending machine. Next, they have in the heel area to the rear open recesses into which holding elements of the heel unit can intervene. These retaining elements may be, for example, two pins facing forward. For example, ski boots are commercially available, which have in their heel area recesses for receiving two forward facing pins as holding elements.

It is understood that in this second type of touring ski bindings, the distance in which the heel counter must be mounted on the ski from the front automatic machine is determined by the length of the sole of the ski boot to be held in the context of an adjustability of the heel piece.

As already mentioned, it is common for touring bindings as well as for piste bindings that they have a downhill position in which they ensure a fixation of the ski boot on the ski. For this purpose, they usually include, among other things, a heel piece, which has a holding configuration. In this holding configuration, these heel machines allow the heel area of the ski boot held in the ski binding to be held down in a lowered position. In addition, these heel machines usually allow a safety release in the forward direction. This allows the heel portion of the ski boot to be released from the heel counter when the skier falls forward in the forward direction from the lowered position.

For the description of such binding systems, a (fictitious) ski is often used as the reference system, assuming that the binding is mounted on this ski. This habit is taken over in the present text. Thus, the term "ski longitudinal direction" means along the orientation of the longitudinal axis of the ski. Similarly, "skiparallel" means aligned for an elongate object along the longitudinal axis of the ski. For a flat object, however, the term "ski-parallel" means aligned parallel to the sliding surface of the ski. Further, the term "ski direction" means a direction transverse to the ski longitudinal direction, which, however, need not be oriented exactly at right angles to the longitudinal axis of the ski. Their orientation may also be slightly different from a right angle. The term "ski center", in turn, means a center of the ski in the ski direction, while the term "ski manifest" does not mean that it can move in relation to the ski. It should also be noted that terms that do not contain the word "ski" refer to the reference system of (fictitious) skis. Thus, the terms "front", "rear", "top", "bottom" and "side" refer to "front", "rear", "top", "bottom" and "side" of the ski. Likewise, terms such as "horizontal" and "vertical" refer to the ski, with "horizontal" lying in a ski-parallel plane and "vertical" oriented perpendicular to this plane.

Heel machines of the technical field mentioned above are known. For example, this describes AT 402 020 B (Barthel) Such a heel machine. It comprises a housing which is pivotable on a mounting plate about an invisible vertical axis against the force of a spring mounted in the housing. In the upper part of the housing two arms are arranged. In the rear region of these two arms vertical axes are arranged, about which the two arms are pivotally mounted. As a result, the two arms are pivotable in a horizontal plane. The front ends of the two arms cantilever forward relative to the housing. These front ends of the two arms form forwardly pointing pins which serve as holding elements by being able to engage in recesses in the heel of a ski boot to hold the ski boot. Next to the pins, the arms carry wedge-shaped oblique surfaces which are perpendicular to the horizontal pivoting plane of the arms and lead laterally apart towards the pins. A U-shaped bracket, which serves as a transmission element is pressed by two springs arranged between the arms from back to front against the inclined surfaces of the arms. As a result, the two arms are pressed towards each other. However, a stop located between the arms prevents the two arms from being pivoted closer than to a minimum distance apart. Therefore, the two pins are held to each other due to the force generated by the springs on the bracket at a predetermined distance.

The heel automat according to AT 402 020 B (Barthel) allows a safety release in the forward direction. When the heel of the ski boot is pushed upwards relative to the heel counter, the two pins are forced apart against the force of the springs due to the shape of the heel of the ski boot until the heel of the ski boot has detached upwards from the heel counter. Until this release, the heel box picks up energy. In this case, the total energy absorbed by the heel unit depends on the path traveled by the pins to release and on the spring force which has to be overcome during the travel of the pins. Due to the shape of the heel of the ski boot is the path, which is covered by the pins to the release set. However, the spring force, which must be overcome during the path of the pins, can be adjusted in the heel counter. This allows the heel counter to adjust the energy used by the Heel machine can be recorded until it comes to a safety release in the forward direction. This setting is also referred to as setting the tripping force, setting the tripping value or somewhat imprecise simply as setting the safety release.

Also the WO 2012/024809 A1 (Fritschi AG) discloses an automatic heel unit, which belongs to the technical field mentioned above. This automatic heel also includes two forward facing pins which serve as retaining elements and can engage recesses in the heel of a ski boot to hold the ski boot. In contrast to the heel unit according to the AT 402 020 B (Barthel) are the pins in the heel counter according to the WO 2012/024809 A1 (Fritschi AG), however, arranged on vertically oriented arms. These arms are mounted in a vertical, transversely aligned to the longitudinal direction of the ski pivotally mounted on the housing of the heel holder. They have at their lower ends to back paragraphs. Behind the arms, a spring is arranged, which presses a piston parallel to the arms down against the shoulders arranged on the arms. Characterized the upper ends of the arms are pressed against the arranged between the arms front wall of the housing of the heel holder. As a result, the two arms are held in a position in which the pins are at a predetermined distance from each other.

The heel automat according to WO 2012/024809 A1 (Fritschi AG) also enables a safety release in the forward direction. Again, the safety release is set by adjusting the spring force.

Both the AT 402 020 B (Barthel) as well as the WO 2012/024809 A1 (Fritschi AG) describe the respective heel piece as belonging to a touring ski binding, which belongs to the above-mentioned second type. However, it is obvious that these heel machines can also be used on touring ski bindings of the above-mentioned first type and in piste bindings.

Regardless of the type of ski binding, these heel machines have the disadvantage that they allow a setting of the safety release only within a limited adjustment range. The reason for this is on the one hand the limited way, which of the pins is traversed until it comes to a trip. On the other hand, the limited space for the spring is one reason. The latter means that no stronger spring can be installed without significantly increasing the volume of the heel counter. Accordingly, the heel machines can not be adjusted so that they can absorb high-energy impacts on the ski, the ski boot and the ski binding in a particularly sporty driving style, without causing an unintentional safety release.

Also the EP 2 545 966 A2 (Salewa Sport AG) describes a heel unit for touring ski binding, wherein the heel unit is adjustable between a walking position and a downhill position. The heel unit comprises a base part to be attached to a ski, a binding body held on the base part, and coupling projections held on the binding body for engagement with a heel portion of a touring shoe. The coupling projections are formed at front ends of two coupling pins which are pivotally supported on pin bearing portions of the binding body. Carrier portions of the two coupling pins are in contact with a common transmission member which is movably supported on the binding body so that movement of the pins via the cam portions is translated into movement of the transmission member. The transmission part has two substantially V-shaped slots, in which the driver sections are guided along two directions of movement. A bearing pin attached to a front end of a My release spring is journaled via a ball-and-socket coupling to a spring bearing of the transmission part. The ball coupling provides for the implementation of the pivotal movement of the spring bearing of the transmission part in a substantially linear compression movement of the My-release spring.

The DE 10 2011 078834 A1 (Micado) discloses a holding system for holding a ski boot on a ski. The holding system comprises a base body, a bracket, a spacer and a spring. The bracket forms a U-shape and has a first web and a second web. The spacer is adapted to be movable upon application of a force in a predetermined direction along the first land and the second land to allow the lands to pivot about their fulcrums can spread apart and a distance between a first Einklemmbereich and a second Einklemmbereich is adjustable. The spring is coupled to the spacer such that a component of the spring force acts on the spacer.

Presentation of the invention

The object of the invention is to provide a the aforementioned technical field associated automatic heel, which allows a setting of a safety release in the forward direction for a particularly sporty driving in a compact design of the heel unit.

The solution of the problem is defined by the features of claim 1. According to the invention, the first force is oriented at an angle to the first direction. Thus, the first force and the first direction are not aligned exactly parallel or anti-parallel. Accordingly, the angle between the first force and the first direction is greater than or equal to 10 ° and less than or equal to 170 °.

For the inventive solution is irrelevant whether the two holding means are each formed by their holding element, or whether the holding elements are only one part of the respective holding means. For example, the retaining means may each comprise, in addition to their retaining element, one or more than one further element. In this case, there is the possibility that in both holding means in each case the holding element is arranged on a further element of the respective holding means. In this case, the retaining element can each be firmly attached to this further element or also movably mounted on this further element. In the case of a retaining element fixedly attached to the further element, there is also the possibility that the retaining element is formed integrally with the further element.

Regardless of the specific design of the holding means, an automatic heel unit according to the invention comprises a prestressable elastic element, by the bias in the prestressed state, a first force is generated with which the elastic element acts on the transmission element to bias the transmission element in a first direction, whereby the two holding elements can be prestressed to their holding distance. As a result of the interaction of the transmission element with the two holding means, the two holding elements can be pretensioned by the bias of the transmission element in the first direction to their holding distance. Against this bias, the holding elements can be moved away from their holding distance. It is irrelevant whether only one of the two holding elements is moved relative to the rest of the heel counter or whether both holding elements are moved, as long as the distance between the two holding elements is changed. In addition, it is irrelevant whether the holding elements against the bias of their holding distance away closer to each other, i. to a smaller distance, or away from each other, i. be moved to a greater distance. Accordingly, it is irrelevant whether the two holding elements are away from each other or to each other to be biased to their holding distance.

Since, according to the solution according to the invention, the first force is oriented at an angle to the first direction, the elastic element can be arranged in a simple manner relative to the transmission element such that the space occupied by the elastic element separates from the space occupied by the transmission element is. In this case, however, an optimal power transmission from the elastic element via the transmission element can be achieved on the holding means to hold the two holding elements in the holding distance to each other. Accordingly, no complex power transmission mechanism is required, which would have to be solid and thus would occupy a large volume. Thus, the solution according to the invention has the advantage that it allows the use of a larger and stronger elastic element, without the automatic heel unit having to be constructed larger.

Preferably, the automatic heel unit allows a safety release in the forward direction. This has the advantage of increasing safety for the skier. For example, this safety release can be made possible by the fact that the two holding elements are moved away from their holding distance in the event of a safety release. Preferably, a holding force is to be overcome, with which the two holding elements are biased to their holding distance. This holding force is determined by the bias of the elastic element in the prestressed state, by which the first force is generated, with which the elastic element acts on the transmission element and biases the transmission element in the first direction. As a result, the transmission element cooperates with the two holding means and biases the two holding elements with holding force to their holding distance. In a preferred variant thereof, the bias of the elastic element is adjustable, whereby the strength of the first force and thus the strength of the holding force is adjustable. This has the advantage that the safety release in the forward direction is adjustable. In a variant, however, there is also the possibility that the bias of the elastic element is not adjustable. In this case, there is the possibility that the safety release in the forward direction in other ways, such as by a variable geometry of the transmission element is adjustable or that the safety release in the forward direction is not adjustable, but fixed.

As an alternative, there is also the possibility that the automatic heel unit does not allow a safety release in the forward direction.

Preferably, the first force is oriented substantially at a right angle to the first direction. In this case, "substantially at a right angle" preferably means that the angle in which the first force is aligned with the first direction lies in a range of 45 ° to 135 °. This has the advantage that the elastic element can be arranged in a particularly simple manner relative to the transmission element such that the space occupied by the elastic element is separated from the space which is occupied by the transmission element. In a particularly preferred variant thereof, however, the first force is at a right angle to the first Direction aligned. This has the advantage that the elastic element can be arranged in a particularly simple manner relative to the transmission element such that the space occupied by the elastic element is separated from the space occupied by the transmission element.

Alternatively, there is also the possibility that the first force is aligned at a different angle to the first direction.

Advantageously, the heel holder comprises a bearing structure. This has the advantage that the heel holder can be stably constructed in a simple manner. To achieve this advantage, it is irrelevant whether the bearing structure is formed in one piece or in several pieces.

Alternatively, there is also the possibility that the heel holder does not comprise a bearing structure.

If the heel holder comprises a bearing structure, the transmission element is preferably movably mounted on the bearing structure. This has the advantage that the transmission element can be designed to be biased in a simple manner in the first direction.

In a first preferred variant thereof, the transmission element is displaceably mounted on the bearing structure relative to the bearing structure. In a second preferred variant thereof, the transmission element is pivotally mounted on the bearing structure. These two variants have the advantage that the transmission element can be stored optimally controlled movable on the bearing structure. However, the transmission element can also be mounted differently movably on the bearing structure.

As an alternative, there is also the possibility that the transmission element is not movably mounted on the bearing structure.

If the heel holder comprises a bearing structure, then the two holding means are advantageously movably mounted on the bearing structure. This has the advantage that the Holding means can be designed to be movable relative to each other in a simple manner.

In a first preferred variant thereof, the two holding means are mounted relative to the bearing structure displaceably on the bearing structure. In a second preferred variant thereof, the two holding elements are pivotally mounted on the bearing structure. These two variants have the advantage that the two holding means can be stored optimally controlled movable on the bearing structure. But there is also the possibility that the two holding means are mounted differently movable on the bearing structure.

As an alternative, there is also the possibility that the two holding means are not movably mounted on the bearing structure.

Preferably, the two holding means each comprise an arm on which the respective holding element for holding the ski boot is arranged in the heel region of the ski boot. This has the advantage that the holding means movable relative to each other can be designed particularly simply such that the distance between the two holding elements can be changed by movement of the holding means relative to one another.

In addition, if the heel holder has a bearing structure and the two holding means are movably mounted on the bearing structure, preferably the arms of the holding means are pivotally mounted on the bearing structure. This has the advantage that in a simple manner, a storage of the holding means is made possible by which a controlled movement of the holding means and thus a controlled change in the distance between the two holding elements is achieved to each other. In a variant of this, however, there is also the possibility that the arms of the holding means are not pivotally mounted, but for example displaceable or not at all movable relative to the bearing structure movably mounted on the bearing structure.

Alternatively, there is also the possibility that the two holding means do not each comprise an arm on which the respective holding element for holding the ski boot is arranged in the heel region of the ski boot.

The transmission element preferably has an effective area for interacting with the holding means. Advantageously, the effective range of the transmission element is formed by one, two or more surfaces, with which the transmission element with the holding means, in particular the holding elements, the possibly present arms of the holding means, or one or more possibly existing further elements of the holding means cooperates and which to the first direction are inclined. This has the advantage that the two holding elements can be formed by the bias of the transmission element in the first direction optimally biased to its holding distance. The effective range of the transmission element can also be designed differently.

Alternatively, however, there is also the possibility that the transmission element has no effective range for interaction with the holding means.

If the two holding means each comprise an arm on which the respective holding element for holding the ski boot in the heel region of the ski boot is arranged, the arms of the holding means are preferably arranged in a first plane and movable in the first plane relative to each other, whereby the distance between the two retaining elements is changeable. This has the advantage that the two holding elements can be formed optimally controllable relative to each other movable.

Preferably, the first plane is aligned horizontally. This has the advantage that a space below and / or above the first level provides space for the arrangement of the transmission element and / or the elastic element. In a preferred variant thereof, however, the first plane is aligned vertically in the direction of the cross-section. This has the advantage that a space behind the first level provides space for the arrangement of the transmission element and / or the elastic element, without affecting the function of the holding elements. Accordingly, these two variants allow the construction of a particularly compact heel counter. In a variant, however, there is also the possibility that the first level is oriented differently. For example, it may be oriented at right angles to a plane running vertically in the longitudinal direction of the ski. This means that a normal vector of the first level lies in the plane running vertically in the longitudinal direction of the ski.

Alternatively, however, there is also the possibility that the arms are not arranged in a first plane and are movable relative to one another in this first plane.

If the two holding means each comprise an arm on which the respective holding element for holding the ski boot in the heel region of the ski boot is arranged, and the arms of the holding means are arranged in a first plane and movable in the first plane relative to each other, whereby the distance between the Both retaining elements is variable, so preferably aligned along the first direction straight line intersects the first plane. This has the advantage that the transmission element can cooperate optimally with the holding means, for example by the transmission element, a tensile force or a shock force can be transmitted to bias the two holding elements to their holding distance.

Preferably, the first direction is oriented substantially perpendicular to the first plane, particularly preferably at right angles to the first plane. Here, "substantially at a right angle" preferably means that the angle at which the first direction is aligned with a normal vector of the first plane is in a range of 0 ° to 45 ° or 135 ° to 180 °. This has the advantage that the transmission element can be arranged in a particularly simple manner relative to the holding means, so that the space occupied by the transmission element is separated from the space occupied by the holding means. But there is also the possibility that the first direction is aligned at a different angle to the first plane.

Alternatively, however, there is also the possibility that a straight line aligned along the first direction lies in the first plane or runs parallel to the first plane.

The first force is preferably aligned substantially parallel, particularly preferably parallel to the first plane. Herein, "substantially parallel" preferably means that the first force is oriented at an angle to a normal vector of the first plane, the angle being in a range of 45 ° to 135 °. This has the advantage that the elastic element in a particularly simple manner next to the first level and thus can be arranged separately from the holding means, so that the elastic Element occupied space is separated from the space, which is occupied by the holding means.

Preferably, the first force is substantially parallel or substantially anti-parallel to the ski longitudinal direction, particularly preferably aligned in the ski longitudinal direction to the front or to the rear. In this context, "essentially parallel to the longitudinal direction of the ski" preferably means that the angle in which the first force is aligned to the ski longitudinal direction lies in a range from 0 ° to 45 °, while "substantially antiparallel to the ski longitudinal direction" preferably means that the angle , in which the first force is aligned to the ski longitudinal direction, in a range of 135 ° to 180 °. In a preferred variant, the first force is oriented substantially vertically upwards or substantially vertically downwards, particularly preferably upwards or downwards. Herein, "substantially vertically upward" preferably means that the angle at which the first force is directed to a vertically upward direction is in a range of 0 ° to 45 °, while "substantially vertically downward" is preferably means that the angle at which the first force is directed to a vertically downward direction is in a range of 0 ° to 45 °. By aligning the first force substantially parallel or antiparallel to the ski longitudinal direction or substantially vertical is made possible that the elastic element can be arranged in a particularly simple manner in the longitudinal direction or vertically aligned, whereby a particularly compact design of the heel unit is enabled ,

Alternatively, there is also the possibility that the first force is aligned at a different angle to the first plane.

Preferably, the holding elements are each formed by a pin, which points with its free end to the front, to engage the ski boot in the heel area of the ski boot into a recess in the heel area of the ski boot. This has the advantage that a particularly effective connection with the ski boot is made possible, which enables a stable holding of the ski boot in the heel area of the ski boot.

Alternatively, however, there is also the possibility that the holding elements are designed differently. For example, the holding elements may be formed by elements which surround a rear area of the ski boot above for holding the ski boot in the heel region of the ski boot and thereby hold down.

If the holding elements are each formed by a pin which points forwardly with its free end in order to engage the ski boot in the heel region of the ski boot in a recess in the heel region of the ski boot, the pins are preferably rotatably mounted about their longitudinal axes. This has the advantage that it is easier for the skier to get started in the automatic heel unit and, moreover, that a safety release in the forward direction, which is possibly ensured by the automatic heel unit, becomes more reliable. It is irrelevant whether the pins are mounted rotatably about their longitudinal axes on a further element of the respective holding means or whether the pins are fixedly attached to a further element of the respective holding means or formed integrally with the further element of the respective holding means and together with the further element are formed rotatable. For example, if the two holding means each comprise an arm on which the respective holding element for holding the ski boot is arranged in the heel region of the ski boot, the pins can be rotatably mounted on the arms about their longitudinal axes or fixedly attached to the arms or in one piece with the arms be formed and designed to be rotatable together with the arms about their longitudinal axes.

Alternatively, there is also the possibility that the pins are not rotatably mounted about their longitudinal axes.

If the two holding means each comprise an arm on which the respective holding element for holding the ski boot in the heel region of the ski boot is arranged, and the holding elements are each formed by a pin which faces forward with its free end to hold the ski boot in Heel area of the ski boot to engage in a recess in the heel area of the ski boot, the pins are preferably formed by the front ends of the arms. This has the advantage that the holding means can be stably constructed in a simple and cost-effective manner. It is irrelevant whether in the two holding means each of the pin and the arm in one piece or are formed in several pieces. If the pins are rotatably mounted about their longitudinal axes, the arms are preferably rotatably mounted about their longitudinal axes. If the heel holder has a bearing structure, the arms are advantageously mounted rotatably about their longitudinal axes on the bearing structure. But there is also the possibility that the pins are rotatably mounted on the remaining arms.

Alternatively, there is also the possibility that the pins are not formed by the front ends of the arms.

Advantageously, the transmission element is a tension element, which transmits a tensile force by its bias in the first direction to bias the two holding elements to their holding distance, or a Stosselement which transmits a shock force by its bias to bias the two holding elements to their holding distance.

It is irrelevant whether the transmission element is mounted displaceably, pivotally or otherwise movable on the possibly existing bearing structure. If the transmission member is a tension member, there is a portion of the transmission member with which the elastic member cooperates to bias the transmission member in the first direction, preferably in the first direction from the retaining means as viewed from the retaining means. This has the advantage that the transmission element can transfer the tensile force optimally to the two holding means. On the other hand, if the transmission element is a bumper element, then the region of the transmission element with which the elastic element cooperates to bias the transmission element in the first direction, preferably in a second direction opposite to the first direction from the retaining means, is viewed from the retaining means , This has the advantage that the transmission element can optimally transfer the impact force to the two holding means.

Regardless of whether the transmission element is a tension element or a stub element, the tensile force or impact force can be deflected during the transfer to the holding means. This can be achieved, for example, by virtue of the fact that the transmission element has an effective region for interacting with the retaining means which is formed by one, two or more surfaces, with which the transmission element with the holding means, in particular the arms or the holding elements cooperates, and which are inclined to the first direction.

Alternatively, the transmission element can also be formed neither as a tension element nor as a shock element. For example, the transmission element can transmit a torque in order to bias the two holding elements to their holding distance.

A ski binding preferably comprises the automatic heel unit according to the invention.

Furthermore, a ski preferably comprises a ski binding with the heel automatic machine according to the invention.

From the following detailed description and the totality of the claims, further advantageous embodiments and feature combinations of the invention result.

Brief description of the drawings

Fig. 1

eine Schrägansicht eines erfindungsgemässen Fersenautomaten in einer Haltekonfiguration,

Fig. 2

eine Frontalansicht des Fersenautomaten in der Haltekonfiguration von vorne gesehen,

Fig. 3

eine Schrägansicht einer Explosionsdarstellung des Fersenautomaten, und

Fig. 4a, b

je einen vertikal in Skilängsrichtung verlaufenden Querschnitt durch den Fersenautomaten, wobei ein Gehäuse eines Fersenhalters des Fersenautomaten ausgeblendet ist.

The drawings used to explain the embodiment show:

Fig. 1

an oblique view of an inventive heel unit in a holding configuration,

Fig. 2

a frontal view of the heel unit in the holding configuration seen from the front,

Fig. 3

an oblique view of an exploded view of the heel counter, and

Fig. 4a, b

depending on a vertically extending in the longitudinal direction of the cross-section through the heel unit, wherein a housing of a heel holder of the heel unit is hidden.

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

Ways to carry out the invention

FIG. 1 shows an oblique view of an inventive heel unit 1 in a holding configuration. In the illustration below on the left, the heel counter corresponds to 1 in the front, while the top right corresponds to the rear of the heel counter 1.

The automatic heel unit 1 comprises a base plate 2, which can be fastened on a ski, not shown here, by means of screws. Further, the automatic heel unit 1 comprises a carriage 3 with a heel holder 4, which is slidably mounted on the base plate 2 in the ski longitudinal direction. The heel holder 4 comprises a housing, which forms a bearing structure 5. Furthermore, the heel holder 4 comprises a holding device 6 for holding a ski boot, not shown here, in a heel region of the ski boot. The holding device 6 comprises two holding means 7.1, 7.2, each with a holding element 8.1, 8.2 for holding the ski boot in the heel area of the ski boot. These holding elements 8.1, 8.2 are each a pin, which points with its free end to the front to intervene to hold the ski boot in the heel area of the ski boot. Thus, the holding elements 8.1, 8.2 correspond to the forward facing pins in the AT 402 020 B (Barthel) and WO 2012/024809 A1 (Fritschi AG) described heel machines. The heel machine 1 can therefore like the one in the AT 402 020 B (Barthel) and WO 2012/024809 A1 (Fritschi AG) described with commercially available ski boots with corresponding recesses in the heel area described.

A distance between the two holding elements 8.1, 8.2 of the present heel machine 1 is changeable. In the FIG. 1 , in which the automatic heel unit 1 is shown in its holding configuration, the holding device 6 is in a holding position. In this holding position, the two holding elements 8.1, 8.2 are in a holding distance. As explained in detail below, the two holding elements 8.1, 8.2 are biased by an elastic element to its holding distance and can be moved apart against this bias. As a result, a safety release in the forward direction is made possible by the automatic heel unit 1.

FIG. 2 shows a front view of the heel unit 1 in the holding configuration seen from the front. As a result, it can be seen that the housing of the heel holder 4 has on its front side two horizontally aligned elongated holes 9.1, 9.2 arranged next to one another. The holding elements 8.1, 8.2 extend from back to front through these two slots 9.1, 9.2 from the housing of the heel holder 4 forward. Since the heel machine 1 in the FIG. 2 is in the holding configuration, the holding device 6 is as already mentioned in the holding position. For this reason, the two holding elements are 8.1, 8.2 at the ski center end facing the respective slot 9.1, 9.2. Starting from this position, the two holding elements 8.1, 8.2 can be moved apart until they reach the end of the respective longitudinal hole 9.1, 9.2 facing away from the ski center.

FIG. 3 shows an oblique view of an exploded view of the heel counter 1. In the illustration at the top left corresponds to the heel counter 1 front, while bottom right in the representation in the heel counter 1 corresponds to the rear.

In the exploded view of the FIG. 3 are the base plate 2 and the carriage 3 with the heel holder 4, which also forms the bearing structure 5 with its housing, clearly visible. Next, the components of the holding device 6 can be seen in the figure.

The holding device 6 comprises, as already mentioned, the two holding means 7.1, 7.2. These holding means 7.1, 7.2 are each formed by a long rod, which is aligned substantially in the ski longitudinal direction. Each rod thus forms an arm 10.1, 10.2, the front end of which forms the corresponding retaining element 8.1, 8.2 or the pin, which points forwardly with its free end in order to engage the ski boot in the heel region of the ski boot. The two arms 10.1, 10.2 each have a circular cross-section. In the region of their rear ends, the arms 10.1, 10.2 also each have a circumferential groove.

The housing of the heel holder 4, which also forms the bearing structure 5 at the same time, has in its upper region two continuous recesses extending in the longitudinal direction of the ski. In a plane oriented vertically in the transverse direction, these two recesses each have a cross-section which is aligned horizontally Long hole corresponds. The front ends of these recesses are defined by the in FIG. 2 shown slots 9.1, 9.2 formed. In the assembled state of the heel unit 1, the two arms 10.1, 10.2 are in these recesses and extend with their front ends, which form the retaining elements 8.1, 8.2, forward beyond the recesses. In this case, the two arms 10.1, 10.2 in the region of their rear ends by a respective rubber piece 11.1, 11.2, so that the rear ends of the arms 10.1, 10.2 are held in the recesses with the slot-shaped cross-section laterally, horizontally in Skiquerrichtung. These rubber pieces 11.1, 11.2 may be made of rubber or of another flexible plastic. The flexible plastic may be stiffer than rubber. In addition, in each arm 10.1, 10.2 in the rear region of the respective arm 10.1, 10.2 a vertically aligned bolt 12.1, 12.2 anchored in the bearing structure 6, which engages in the groove of the respective arm 10.1, 10.2. As a result, the two arms 10.1, 10.2 are held in the bearing structure 5 and secured against movement in the longitudinal direction of the ski. However, this storage allows a pivoting movement of the arms 10.1, 10.2 to the bolts 12.1, 12.2. Thus, the two arms 10.1, 10.2 are arranged in a horizontally oriented, first plane and movable in this first plane relative to each other. This makes it possible that the distance between the two holding elements 8.1, 8.2 can be changed. The mounting of the arms 10.1, 10.2 also allows rotation of the arms 10.1, 10.2 and thus of the holding elements 8.1, 8.2 about the longitudinal axis of the arms 10.1, 10.2. As a result, the entry into the automatic heel 1 is facilitated for the skier. In addition, the ski boot can be more reliably released from the heel car office 1 in the event of a safety release in the forward direction.

In the assembled state of the heel unit 1 is located in the housing of the heel holder 4, a transmission element 13, which forms a further part of the holding device 6. This transmission element 13 is formed from a metal sheet. It is oriented substantially vertically in the transverse direction and mounted displaceably in the vertical direction on the bearing structure 5. The transmission element 13 has two upwardly projecting arms, which are spread apart in a V-shape away from the ski center. With these two arms, the transmission element 13 engages around the two arms 10.1, 10.2 of the holding means 7.1, 7.2 from below. So they form diagonally upwards to the ski center showing flanks of the two arms of the transmission element 13 an effective range for cooperation with the two arms 10.1, 10.2 of the holding means 7.1, 7.2. This is in the view of FIG. 2 to recognize where the two upward v-shaped away from the ski center apart arms of the transmission element 13 in the slots 9.1, 9.2 next to the holding means 8.1, 8.2 can be seen. Therefore, when the transmission element 13 is moved upward, the two arms 10.1, 10.2 and thus the two holding elements 8.1, 8.2 are moved towards each other to their holding distance. In contrast, when the two holding elements 8.1, 8.2 are pressed apart, the transmission element 13 is pressed down.

Next is in the assembled state of the heel unit 1 in the housing of the heel holder 4, a coil spring 14 with a piston 15. This coil spring 14 and this piston 15 are also components of the holding device 6. The coil spring 14 is an elastic element. It is aligned and biased in the ski longitudinal direction. With its rear end, the coil spring 14 is supported against a screw 16. The screw 16 is accessible from outside the housing of the heel holder 4. By turning the screw 16, the rear end of the coil spring 14 can be moved slightly backward or slightly forward. As a result, the bias of the coil spring 14 can be adjusted. With its front end, the coil spring 14 pushes the piston 15 forward against a tapered portion of the transmission element 13, which is located in the lower region of the transmission element 13. Thus, the coil spring 14 generates by its bias a first force, which is aligned in the ski longitudinal direction forward. Via the piston 15, the coil spring 14 acts with the first force on the transmission element 13, which is thereby biased upward in a first direction due to its bevelled area. Due to the upwardly biased transmission element 13, the two arms 10.1, 10.2 and thus the two holding elements 8.1, 8.2 biased towards each other to their holding distance. This arrangement of the elements of the heel unit 1 results in that the first force and the first direction are aligned at right angles to each other. In addition, the first direction is aligned perpendicular to the first plane, while the first force is aligned parallel to the first plane. Thereby, the coil spring 14 can be arranged below the two holding means 7.1, 7.2, whereby a comparatively large coil spring 14 is used can be without the construction of the heel unit 1 would have to be increased. Accordingly, the automatic heel unit 1 allows adjustment of the safety release in the forward direction for a particularly sporty driving style.

It is understood that according to the invention, the elements of the heel counter can also be arranged differently. So it is sufficient if the first force is aligned at an angle to the first direction. This angle can be for example 15 °, 30 °, 45 °, 60 ° or 75 °. In addition, the first direction may be oriented at a different angle to the first plane or even in or parallel to the first plane. For example, the first direction may be oriented at an angle of 15 °, 30 °, 45 °, 60 ° or 75 ° to a normal of the first plane. It is also not necessary that the arms 10.1, 10.2, the holding means 7.1, 7.2 must be aligned in the ski longitudinal direction. Accordingly, the arms 10.1, 10.2 of the holding means 7.1, 7.2, for example, also be aligned vertically. In this case, the first plane is oriented vertically in the skibear direction. But the arms 10.1, 10.2 and the first level can also be aligned differently. For example, the first plane may be oriented such that its normal vector is aligned in a vertical, longitudinally aligned plane.

The FIGS. 4a and 4b each show a vertically extending in the longitudinal direction of the cross-section through the heel unit 1, wherein the housing of the heel holder 4 is hidden. As a result, the components of the holding device 6 can be seen better. In the FIG. 4a the heel unit 1 is shown in its holding configuration. In the FIG. 4b however, the heel unit 1 is not shown in its holding configuration. Here, the two holding elements 8.1, 8.2 are moved apart as in the entry into the heel unit 1 or a safety release in the forward direction, so that the transmission element 13 moves down and the piston 15 is moved against the bias of the coil spring 14 to the rear.

In FIG. 4a it can be seen that the transmission element 13 is in an upper position. In addition, it can be seen how the piston 15 comes flush with its front against the tapered portion of the transmission element 13. In the FIG. 4b however, the transmission element 13 is in a lower position. As already described, the transmission element 13 is here due to the apart Holding elements 8.1, 8.2 and arms 10.1, 10.2 pressed down. As a result, the piston 15 is pressed by the tapered portion of the transmission element 13 to the rear against the coil spring 14. It can thus be seen how the two holding elements 8.1, 8.2 are biased by the elastic element formed by the coil spring 14 to its holding distance and can be moved apart against this bias. This bias allows the automatic heel unit 1 a safety release in the forward direction.

In the FIGS. 4a and 4b is also a guide plate 17 can be seen in cross section. This guide plate 17 is embedded in the housing of the heel holder 4 and has two recesses in the shape of in FIG. 2 shown slots 9.1, 9.2. The guide plate 17 serves to guide the two arms 10.1, 10.2 in a pivoting movement in the horizontal direction. It can absorb vertical forces which can act on the arms 10.1, 10.2 during skiing by the action of the ski boot on the holding elements 8.1, 8.2 and by the upwardly biased transmission element 13.

As in FIG. 3 can be seen, the automatic heel unit 1 in addition to the components already described also includes a ski brake 50. This ski brake 50 includes a brake bracket 51, which consists of bent wire. The two free ends of this brake bracket 51 point to the rear and form brake arms. In a braking position of the ski brake 50, these two brake arms extend on both sides of the ski down beyond the sliding surface of the ski. Thus, the brake arms can interact in the braking position with the snow and brake the ski. In contrast, in a driving position of the ski brake 50, the two brake arms are pivoted upwards over the ski and have no such braking effect. To move the brake arms between these two positions back and forth when the ski brake 50 is moved from the driving position to the holding position and back, the brake bracket 51 is pivotally mounted in its central portion 52 about a horizontally oriented in the ski axis direction axis in a brake bearing 53 , When the brake arms are pivoted downwards in the braking position, the front region 54 of the ski brake 50, to which a tread plate 55 is attached, is pivoted upwards away from the ski. If the brake arms in the driving position, however, upwards are pivoted so that they point horizontally to the rear, the front portion 54 of the ski brake 50 is lowered with the tread plate 55 to the ski out.

The shape of the brake yoke 51 and the brake bearing 53 are selected such that the two brake arms of the brake yoke 51 in the assembled state of the automatic heel 1 are slightly biased against each other. They are in the braking position more tensioned against each other than in the driving position. Due to this bias, the ski brake 50 is biased toward its braking position. However, when the ski brake 50 is in the braking position, it can be adjusted to the driving position when, for example, a ski boot presses the tread plate 55 from top to bottom. In addition, it can also be kept in the driving position by the presence of a ski boot.

The heel machine 1 is not only suitable for a downhill binding, but also for touring ski binding. It has a departure configuration in which the heel holder 4 can interact with the heel area of the ski boot and lock the ski boot in a lowered position. Furthermore, the automatic heel unit 1 also has a housing configuration in which the heel area of the ski boot is released and the ski boot can be lowered to the ski or heel unit 1 and lifted off again without being locked in the lowered position with its heel area. In the downhill configuration, the ski brake 50 is basically released and can move into its braking position as soon as a ski boot releases the space above the footboard 55. In the Gehkonfiguration however, the ski brake 50 may be in the braking position. Once the ski brake 50 but once adjusted to its driving position by, for example, a ski boot pushes the foot plate 55 down, the brake lever 51 engages in a brake holder 56 and is held by the brake holder 56 in the driving position, as long as the automatic heel 1 in the Gehkonfiguration is located. Only when the automatic heel unit 1 is adjusted in the departure configuration, the brake lever 51 is released from the brake holder 56 and can be adjusted again in the braking position.

The mechanism which makes this possible, is constructed as follows: The base plate 2 has on its upper side a running in the longitudinal direction of the channel, in whose rear area a thread 60 is arranged. In the assembled state of the heel unit 1, a screw 61 is placed in this thread 60. This worm 61 is provided with a rearwardly pointing bolt 62. The rear end of this bolt 62 is accessible from outside the heel unit 1. Therefore, by turning the bolt 62, the worm 61 in the thread 60 can be screwed forward and backward.

At the front of the worm there is another bolt 63, which has a support element 64 at its rear end and a nut 65 at its front end. On this bolt 63, a longitudinal compensation spring 66 is arranged in the form of a spiral spring. In the assembled state of the heel unit 1, the bolt 63 is supported with the support member 64 to the rear against the worm 61.

Between the base plate 2 and the carriage 3, an intermediate element 57 is arranged. This intermediate element 57 is displaceable in the longitudinal direction of the ski. It has on its underside a recess with which it is slipped over the worm 61, the support member 64 and the longitudinal compensation spring 66. In this case, the longitudinal compensation spring 66 is biased so that the longitudinal compensation spring 66 is supported against the front of the front edge of the recess in the intermediate member 57 against the rear via the support member 64 against the worm 61, wherein the worm 61 is in turn supported on the rear edge of the recess in the intermediate member 57. Thus, the intermediate member 57 can be moved relative to the bias of the longitudinal balance spring 66 relative to the base plate 2 to the rear.

The carriage 3 with the heel holder 4 is a mechanism such as those in the EP 2 705 883 B1 is described, between a front and a rear position relative to the intermediate member 57 movable back and forth. When the carriage 3 with the heel holder 4 is in its forward position, the heel unit 1 is in the downhill configuration. In contrast, when the carriage 3 is in the rear position with the heel holder 4, the automatic heel unit 1 is in the walking configuration. In this position, the heel holder 4 is sufficiently far back, so that the holding device 6 can not lock the ski boot in the lowered position.

Both in the departure configuration and in the walking configuration of the heel piece 1, the slide 3 with the heel holder 4 together with the intermediate element 57 can be moved backwards against the bias of the longitudinal compensation spring 66. In the departure configuration of the heel unit 1, this makes it possible to compensate for changes in distance between a front automatic machine belonging to the ski binding and the automatic heel unit 1, which can occur when the ski deflects, by displacing the heel holder 4 in the longitudinal direction of the ski. This is for example also in the WO 2012/024809 A1 (Fritschi AG).

Thus, the intermediate member 57 and the carriage 3 allow a longitudinal compensation. In this longitudinal compensation, the worm 61 remains in position relative to the base plate 2. By turning the bolt 62, however, the worm 61 can be moved together with the intermediate element 57 and thus also with the carriage 3 in the longitudinal direction. This makes it possible that a position of the heel holder 4 seen in the ski longitudinal direction can be adapted to different sized ski boots.

The bolt 63 is, as already mentioned, supported by the support member 64 to the rear against the worm 61. The support element 64 is shaped such that it can indeed be displaced by a movement of the screw 61 in the ski longitudinal direction. However, the support member 64 has two wings, which prevents rotation together with the screw 61. The bolt 63 extends forward beyond the carriage 3 and the intermediate member 57 addition. The nut 65 is therefore located in front of the carriage 3 and the intermediate member 57th

The brake holder 56 is slidably guided in front of the carriage 3 in the ski longitudinal direction on the base plate 2. However, he is held by the nut 65 in position. Thus, the brake holder 56 is moved together with the screw 61 and the carriage 3 in the longitudinal direction of the ski when the automatic heel unit 1 is adapted to a specific ski boot size. However, when the intermediate member 57 is moved with the carriage 3 and the heel holder 4 due to a longitudinal compensation in the ski longitudinal direction relative to the base plate 2, the brake holder 56 remains like the worm 61 in the same position relative to the base plate. 2

The brake holder 56 also serves as a heel support. With the heel unit 1 in the walking configuration, the ski boot can be lowered down to the heel. In the brake holder 56, the brake bearing 53 is slidably guided in the ski longitudinal direction. In this case, the brake bearing 53 laterally on two rearwardly facing arms, which cooperate in the assembled state of the heel unit 1 with the carriage 3 and pushed by the carriage 3 forward or can be pulled backwards. As a result, the brake bearing 53 with the brake yoke 51 when adjusting in the Gehkonfiguration by the movement of the carriage 3 to the rear also pulled backwards. In addition, the brake bearing 53 is moved with the brake bracket 51 when adjusting in the downhill configuration by the movement of the carriage 3 forward also forward. Therefore, the brake pad 51 is located further back in the housing configuration than in the downhill configuration. Thus, the brake hanger 51 in the walking configuration is within reach of the brake holder 56 and can be held by the brake holder 56 in the driving position. In the Abfahrtskonfiguration contrast, the brake lever 51 is out of reach of the brake holder 56. Therefore, the brake lever 51 is released in the departure configuration of the heel unit 1 from the brake holder 56 and can move by its bias in the braking position, if the tread plate 55 is not by a ski boot after down to the ski.

In this construction, there is the possibility that the brake bearing 53 relative to the carriage 3 has a game, so that although the carriage 3 participates in the longitudinal compensation, but the brake bearing 53 maintains its position relative to the base plate 2. It can be provided that only for larger movements such as an extraordinarily strong deflection of the ski, which causes a large change in distance of the carriage 3 relative to the base plate 2 in the context of longitudinal compensation, the brake bearing 53 is moved with the brake bracket 51 in the ski longitudinal direction. However, it can also be provided that the brake bearing 53 with the brake yoke 51 retains its position relative to the base plate 2 even with an extraordinarily high deflection of the ski. In both cases, however, it is provided that when adjusting the heel unit 1 between the downhill configuration and the Gehkonfiguration the brake bearing 53 with the brake bracket 51 by the movement of the carriage 3 at least is shifted slightly in the ski longitudinal direction, so that the brake lever 51 is just out of reach or within reach of the brake holder 56.

But there is also the possibility that the brake bearing 53 with respect to the carriage 3 has no play, so that the brake bearing 53 participates with the brake bracket 51, each movement of the carriage 3 in the ski longitudinal direction relative to the base member 2.

The invention is not limited to the automatic heel unit 1 described in connection with the figures and the variants thereof described. For example, it is not necessary for the automatic heel unit to have the described ski brake or even a ski brake. Also, it is not necessary for the heel unit to be adjustable between a downhill configuration and a walk configuration. If it is adjustable between a downhill configuration and a walk configuration, then it is not necessary for the heel holder to be located further back in the walk configuration than in the downhill configuration. For example, the heel box may also be adjustable between a downhill configuration and a walking configuration by first moving the heel holder backward and then back to the same position, or pivoting about a vertical axis.

The transmission element can also be shaped differently. For example, it may have inclined slots through which the arms of the retaining means are guided. In this case, the movement of the arms and thus the holding means to each other can be determined by the inclination of the slots when the transmission element is moved in the vertical direction. In addition, there is the possibility that the transmission element does not transmit a shock force, but a tensile force. For example, the transmission element can thus be biased by the piston down. If, as already mentioned, the transmission element has slots through which the arms of the holding means are guided, these slots can, for example, be arranged running upwards towards one another. This can be achieved that the arms are biased towards each other by the bias of the transmission element to each other.

In summary, it should be noted that an automatic heel is provided, which in a compact design of the heel counter a setting of a Safety release in the forward direction also allowed for a particularly sporty driving style.

Claims (15)

1. An automatic heel unit (1) for a ski binding, in particular a touring ski binding, comprising a heel holder (4) having a holding device (6) for holding a ski boot in a heel region of the ski boot, wherein the automatic heel unit (1) has a holding configuration, in which the holding device (6) is in a holding position and may interact with the heel region of the ski boot held in the ski binding in such a way that the heel region of the ski boot is held down in a lowered position, wherein the holding device (6) comprises:

   a) two holding means (7.1, 7.2), each of which provided with a holding element (8.1, 8.2) for holding the ski boot in the heel region of the ski boot, wherein both holding means (7.1, 7.2) are movable with respect to each other, whereby a distance between both holding elements (8.1, 8.2) is variable, wherein both holding elements (8.1, 8.2) in the holding position of the holding device (6) are at a holding distance from each other,

   b) a transmission element (13) for interacting with both holding means (7.1, 7.2), wherein the transmission element (13) is movable with respect to both holding means (7.1, 7.2), and

   c) a preloadable elastic element (14), the preloading of which generates a first force in the preloaded condition, which is applied by the elastic element (14) to the transmission element (13), in order to preload the transmission element (13) in a first direction, whereby both holding elements (7.1, 7.2) may be preloaded at their holding distance,

   characterized in that the first force forms an angle greater or equal to 10° and smaller or equal to 170° with respect to the first direction.
2. The automatic heel unit (1) of claim 1, characterized in that the first force is essentially directed at right angles with respect to the first direction.
3. The automatic heel unit (1) of claim 1 or 2, characterized in that the heel holder (4) comprises a mounting structure (5).
4. The automatic heel unit (1) of claim 3, characterized in that the transmission element (13) is movably supported on the mounting structure (5).
5. The automatic heel unit (1) of claim 3 or 4, characterized in that both holding means (7.1, 7.2) are movably supported on the mounting structure (5).
6. The automatic heel unit (1) of any of claims 1 to 5, characterized in that each of the two holding means (7.1, 7.2) comprises an arm (10.1, 10.2), on which the corresponding holding element (8.1, 8.2) is positioned for holding the ski boot in the heel region of the ski boot.
7. The automatic heel unit (1) of claim 6, characterized in that the arms (10.1, 10.2) of the holding means (7.1, 7.2) are positioned in a first plane, and are movable with respect to each other in the first plane, whereby the distance between both holding elements (8.1, 8.2) may be varied.
8. The automatic heel unit (1) of claim 7, characterized in that a straight line extending along the first direction intersects the first plane.
9. The automatic heel unit (1) of claim 7 or 8, characterized in that the first force is essentially parallel to the first plane.
10. The automatic heel unit (1) of any of claims 1 to 9, characterized in that the holding elements (8.1, 8.2) are formed by a respective pin, which is aligned with its free end in a forward direction in order to engage in a recess in the heel region of the ski boot for holding the ski boot in the heel region of the ski boot.
11. The automatic heel unit (1) of claim 10, characterized in that the pins are supported for rotation around their longitudinal axes.
12. The automatic heel unit (1) of any of claims 6 to 9 and claim 10 or 11, characterized in that the pins are formed by the front ends of the arms (10.1, 10.2).
13. The automatic heel unit (1) of any of claims 1 to 12, characterized in that the transmission element (13) is a pulling element, which transmits a pulling force in the first direction due to its preloading in order to preload both holding elements (8.1, 8.2) at their holding distance, or that the transmission element (13) is a pushing element, which transmits a pushing force due to its preloading, in order to preload both holding elements (8.1, 8.2) at their holding distance.
14. A ski binding having an automatic heel unit (1) of any of claims 1 to 13.
15. A ski having a ski binding of claim 14.

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