EP2384794A1 - Heel unit for a binding, in particular touring-ski binding - Google Patents

Abstract

The unit has a base body (18) fixed at a board e.g. snow board, and a main body (22) mounted at the base body between a normal position and a lateral triggering position. A control body and a wedge element pre-stress one of front ends (26a, 26b) of dowels (24a, 24b) at a normal position. A pin pre-stresses the main body at the normal position. Elastic elements (44a, 44b) provide clamping forces for the control body, wedge element and the pin. The lugs are engaged in recesses of a heel section of a ski shoe to fix the shoe at the heel unit.

Description

The present invention relates to a heel unit for a binding comprising a base body to be fixed to a board defining a forward direction, a main body movably mounted to a base body between a normal position and a side release position, two side-by-side heel engaging projections for engaging recesses of a heel portion of a shoe in order to fix the shoe to the heel unit, wherein the heel engaging projections in the normal position of the main body project substantially forwardly from the main body and at least one of the heel engaging projections is movable relative to the other heel engaging projection between a normal position and a frontal release position, a first tensioning device the at least one of the heel engaging projections biasing to its normal position, and a second tensioning device, which the main body to its normal pretension.

The heel units treated in the present disclosure are in particular heel units for touring ski bindings whose base body is to be attached to a touring ski. As a board to which a heel unit of the invention is to be attached, however, split boards (longitudinally divisible snowboards, the halves of which are used as touring skis) or snowshoes are equally contemplated, so that the invention also relates to heel units for bindings of such boards, when will be referred to hereinafter mainly without reference to the subject invention on touring ski bindings.

A generic heel unit of the type described above is for example from the WO 2009/105866 A1 and has two heel engaging projections forming, parallel pins, from a first Clamping device, which has a first coil spring, are biased to a normal position. Further, the known heel unit comprises a pivotable about a vertical axis main body, which is biased by a second tensioning device which has a second coil spring in the normal position. While the first coil spring is integrated in the main body, the second coil spring is in a skifesten housing.

Another heel unit for a touring ski binding is from the EP 0 199 098 A2 and comprising a pivotable about a vertical axis main body, which is biased by a tensioning device in a normal position, and a U-shaped heel-engaging strap, the U-legs form at its front portions Heersingriffsvorsprünge for a heel portion of a shoe. The heel engaging projections are thus biased due to the elasticity of the U-shaped bracket in its normal position.

In the heel units known from the prior art, the heel-engaging projections and the main body are each elastically biased into a normal position, in which a heel portion of the shoe is fixed in the running position on the ski. The movement of the heel-engaging projections away from each other against an elastic biasing force permits frontal deployment, i. releasing or releasing the ski boot upon application of a torque about a ski axis (Y-axis) when this torque exceeds a My-release torque. On the other hand, the pivoting movement of the main body against the elastic force of the second tightening direction allows a side release, i. releasing or releasing the ski boot from the heel unit upon application of a torque about a vertical axis (Z axis) greater than an Mz release torque.

Generic heel units thus allow both Mz-tripping and My-triggering, with such a security bond with connected according to great constructive effort for the provision of the two trigger mechanisms.

The object of the invention is to provide a heel unit for a binding, which allows both My-triggering and Mz-triggering, but which can be produced with reduced design complexity or reduced size / weight.

To achieve this object, the invention proposes a heel unit of the generic type, which according to the invention has an elastic element which provides both clamping force for the first clamping device and clamping force for the second clamping device. The invention thus provides an elastic element with double function, which on the one hand provides clamping force for the frontal release and on the other hand clamping force for the side release, so that on the provision of separate elastic elements as well as on the support and coupling separate elastic elements for biasing the heel-engaging projections on the one hand and the biasing of the main body on the other hand can be dispensed with. Thus, according to the invention, the frontal release mechanism and the side release mechanism can share an important functional part, namely a force source for the deployment force. As a result, a heel unit of the invention can be made with less design effort and thus smaller or lighter.

In a preferred embodiment of the invention, it is provided that the first tensioning device comprises a first power transmission arrangement, which transfers tensioning force from the elastic element to the at least one of the heel engagement projections, preferably to both heel engagement projections, and the second tensioning device comprises a second power transmission arrangement, which tensioning force transmits from the elastic member to the main body. By providing a first and a second power transmission arrangement According to this embodiment, a force acting direction of the elastic member can be decoupled from a moving direction of the heel engaging protrusions as well as a moving direction of the main body, so that the design freedom with regard to the design and orientation of the elastic member can be increased. The movement of the main body for side release is preferably a pivoting movement.

The elastic member may include a fixed portion and a movable portion between which acts the elastic biasing force of the elastic member. The specified section can be directly fixed to the main body, creating a particularly simple construction. Alternatively, the fixed portion may be supported on a support element fixed in an adjustable position relative to the main body, which may have the advantage that by adjusting the position of the support element, a biasing force of the elastic element, in particular for setting a triggering torque, can be changed. In addition, it can be adjusted advantageously by only one adjustment movement of the support member of the common elastic element, a release torque for both side release as well as for frontal release simultaneously. In the case of using a spring as an elastic element, the support member may be, for example, an adjustable spring stop.

In an elastic member described above, a movable portion of the elastic member may be connected to a control body so that the control body can move relative to the main body with or against the elastic force of the elastic member. The control body can then be manufactured as part of the first or / and the second power transmission arrangement as a low-cost component. Particularly preferably, a common control body is part of both the first power transmission arrangement and the second power transmission arrangement, so that the control body also has a double function both as part of the front release mechanism and as part of the side release mechanism, and further simplification of the device becomes possible.

In a heel unit of the invention provided with power transmission assemblies and a control body, according to another preferred embodiment, the first power transmission assembly may include a first camming transfer between the control body and the heel engagement projections and the second power transmission assembly may comprise a second camming transmission between the control body and the base body. A power transmission arrangement based on a cam transmission provides a simple and highly effective way of transmitting power and motion.

In the present disclosure, a control curve transmission is understood to mean a transmission between a first element and a second element, in which the two elements slide or roll against one another and in which by appropriate shaping of the contours of the two elements and / or by restricting the freedom of movement of the elements Movement of the one element can be implemented in a predetermined movement of the other element. The transmission can take place, in particular, with a change in the direction of movement, with a change in the speed of movement and / or under an increase in power or a loss of power. Cam transmissions are known to those skilled in the art in the form of cam transmissions, wedge surface transfers or the like. The control cams used can have a curved or straight course and can be continuous or unsteady.

If the first and / or the second control cam transmission comprises a wedge surface and a wedge opposing surface sliding off on the wedge surface, then a substantially rectilinear relative movement between the two Both elements of the control curve transmission can be achieved and a manufacturing technology simple power transmission arrangement can be realized. Further, the first and / or the second control cam transmission comprise a control cam and guided on the control cam cam follower, whereby by appropriate design of the course of the control curve simple and more complicated movements are reliably realized. The cam can be straight or curved, including multiple-curved, run.

In a further preferred embodiment of the invention, the base body on an upright pin, on which the main body is pivotally mounted, so that the main body not only rotatably supported by the pin but also can be stabilized.

A heel unit with an upright pin of the aforementioned type can advantageously be used in conjunction with the above-mentioned control body by the control body has a cam follower, which is guided on a control cam of the pin. The cam follower may in particular be designed to simplify the production as a portion of the control body, ie be integrally connected to the control body, or may be attached to the control body, for example, to make the cam follower as a wear component interchangeable. In a pivoting movement of the main body of the cam follower, which is pressed by the elastic means against the control cam of the pin, guided along the control cam of the pin, so that the control body according to the contour of the control cam moves relative to the main body and thereby with or against the elastic force of the elastic element is shifted. A pivotal movement of the main body in a direction from the normal position to the side release position (to the left or to the right) is then opposed to an elastic clamping force of the elastic element, while a pivotal movement in a direction from a side release position to the normal position is supported by the elastic resilience of the elastic member.

In the embodiment described last, the control cam may preferably be formed in a recess at an upper end of the pin, so that the control cam can be produced by simple machining or by simple shaping manufacturing process.

In the frontal release mechanism of a heel unit according to the invention, at least one of the heel engaging projections may be formed on a front portion of a pin, and on the pin or on a wedge member fixedly connected to the pin, a wedge surface sliding on a counter wedge surface of the control body may be formed Move movement of the heel engaging projection in a movement of the control body parallel to the forward direction. Such pins with wedge elements are, for example, from the AT 402 020 B known there and allow a simple power transmission between a jig and the pins. The use of a wedge surface and a counter wedge surface is relatively low maintenance and works reliably even in adverse conditions.

In a further preferred embodiment of the invention, the direction of movement of the elastic element extends substantially along a longitudinal axis of the main body, which is oriented in the normal position of the main body parallel to the forward direction, whereby space can be reduced in a direction transverse to the forward direction and in particular in a linear clamping element, such as a coil spring, a sufficient length in the direction of movement of the elastic member to ensure a well-defined release behavior can be ensured.

An equipped with a control body of the type mentioned above heel unit may advantageously have a longitudinal guide in which the control body is guided in the main body for movement parallel to the longitudinal axis of the main body, so that a space-demanding movement of the control body can be avoided transversely to the main axis.

In a further embodiment of the invention, the heel unit may comprise a plurality of the elastic elements according to the invention, wherein then each of the elastic elements provides both clamping force for the first clamping device and clamping force for the second clamping device. Thus, by a corresponding number of elastic elements, e.g. parallel arranged linear clamping means, a particularly high total clamping force can be achieved. Advantageously, all elastic elements are based on one and the same control body as a common control body in the case of a plurality of elastic elements, so that the control body can unite the individual forces of the elastic elements to form a total tension force and, on the other hand, distribute the total tension force to the frontal release mechanism and the side release mechanism.

Figur 1

eine perspektivische Ansicht einer Ferseneinheit gemäß dem Ausführungsbeispiel der vorliegenden Erfindung;

Figur 2

eine Seitenansicht der Ferseneinheit des Ausführungsbeispiels in einer auf einem Ski montierten Anordnung;

Figur 3

eine Schnittdarstellung der Ferseneinheit des Ausführungsbeispiels in einer Normalstellung gemäß einer Schnittlinie III-III in Figuren 2 und 5;

Figur 4

eine Schnittdarstellung der Ferseneinheit des Ausführungsbeispiels in einer Normalstellung gemäß einer Schnittlinie IV-IV in Figuren 2 und 5;

Figur 5

eine Vorderansicht der Ferseneinheit des Ausführungsbeispiels;

Figur 6

eine Längsschnittdarstellung der Ferseneinheit des Ausführungsbeispiels gemäß einer Schnittlinie VI-VI in Figur 5;

Figuren 7 und 8

Schnittdarstellungen entsprechend den Figuren 3 und 4 für die Ferseneinheit des Ausführungsbeispiels, jedoch in einer Seitenauslösestellung, und

Figur 9

eine Rückansicht des in Figur 2 dargestellten Skischuhs.

The invention will be explained in more detail below with reference to a preferred embodiment with reference to the accompanying drawings. Show it:

FIG. 1

a perspective view of a heel unit according to the embodiment of the present invention;

FIG. 2

a side view of the heel unit of the embodiment in a mounted on a ski arrangement;

FIG. 3

a sectional view of the heel unit of the embodiment in a normal position according to a section line III-III in Figures 2 and 5 ;

FIG. 4

a sectional view of the heel unit of the embodiment in a normal position according to a section line IV-IV in Figures 2 and 5 ;

FIG. 5

a front view of the heel unit of the embodiment;

FIG. 6

a longitudinal sectional view of the heel unit of the embodiment according to a section line VI-VI in FIG. 5 ;

FIGS. 7 and 8

Sectional views according to the FIGS. 3 and 4 for the heel unit of the embodiment, but in a side release position, and

FIG. 9

a rear view of the in FIG. 2 shown ski boot.

In Figures 1 and 2 For example, a heel unit of the embodiment is shown generally at 10. The heel unit is part of a touring ski binding provided for attachment to a touring ski 12 for fixing a touring ski boot 14 in a heel portion 16 of the boot 14 for a descent.

For attachment to the ski 12, the heel unit 10 comprises a base body 18 which is to be fastened to the ski 12 by suitable fastening means. The fastening means may comprise fastening holes 20, in the exemplary embodiment two front fastening holes 20 on both sides of a ski central axis and a rear fastening hole 20 on the ski central axis, which are penetrated by screws screwed into the ski 12 (not shown).

To the heel unit 10 further includes a main body 22, which is pivotable about a substantially vertical axis on the base body 18th is mounted. At its top, the main body 22 carries mounting portions 23 for a climbing aid. In the exemplary embodiment, the mounting portions 23 pivot bearings for pivotally mounting at least one folding climbing aid, which can be folded forward in a climbing mode of touring ski binding, so that the heel portion 16 of the ski boot 14 can be supported thereon.

The base body 18, in particular its fastening means (fastening holes 20 in this case), define a forward direction X of the heel unit, which coincides with the direction of travel of the ski 12 or with the direction in which the toe of the ski boot 14 is in normal use. Orthogonal to the forward direction X and also horizontal, i. in the skibear direction, a y-direction is defined. Orthogonal to the forward direction X and to the Y direction extends in the vertical direction of a Z-direction.

Two pins 24a, 24b are supported in the main body 22 so as to be substantially parallel to each other in the forward direction X, and their frontward X end portions 26a, 26b project forwardly beyond the main body 22 and form heel engaging projections formed in at least one corresponding recess 28 engage the heel portion 16 of the ski boot 14 to fix the heel portion of the ski boot 14 on the heel unit 10 ready to drive.

The heel unit 10 provides a frontal release mechanism which, when a predetermined frontal release torque, ie, a predetermined My-torque about a Y-axis extending Y-axis, the heel portion 16 of the ski boot 14 is free upwards and thus, for example, in the event of a frontal fall in which the skier supports X in the forward direction, allows the ski boot 14 to be raised upwards and forwards (pivotal movement about Y-axis). In a conventional manner, the frontal release mechanism by the pins 24 a, 24 b and a corresponding shape of the recess 28 realized at the heel portion 16 of the ski boot 14. As in particular in FIG. 9 can be seen, the recess 28 for each of the pins 24a, 24b, a notch 28a, 28b, in which the pins 24a, 24b abut in the normal position and hold the ski boot 14 ready for driving force under the triggering threshold. The pins 24a, 24b are mounted on the main body 22 so that their front ends 26a, 26b are movable away from each other against the force of a tensioner to be described later. Due to the shape of the notches 28a, 28b, an upward movement of the heel portion 16 drives the pins 24a, 24b far apart as the tensioning force of the tensioning device is overcome, so that the front ends 26a, 26b of the pins 24a, 24b completely disengage from the detent notches 28a, 28b the ski boot 14 triggers upwards.

The heel unit 10 further provides a side release mechanism which, when a predetermined lateral release torque acting on the ski boot 14, ie a predetermined Mz release torque about an axis extending in the Z direction, releases the heel portion 16 of the ski boot 14 to one side, so that the ski boot 14, for example, triggers laterally in the event of a fall and is decoupled from the ski 12. This side release takes place in a conventional manner by pivotal movement of the main body 22 about the Z-axis. As will be explained in more detail later, the heel unit 10 comprises a tensioning device, which the main body 22 to the in Figures 1 and 2 shown normal position, in which the pins 24a, 24b are oriented substantially parallel to the forward direction X, biased, and a pivoting movement of the main body 22 from the normal position to a side release position a predetermined clamping force corresponding to the predetermined Mz-triggering torque opposes.

With reference also to the FIGS. 3 to 6 The structure of the heel unit 10 of the embodiment will be particularly with regard to the frontal release mechanism and the side release mechanism explained in more detail.

A major axis A of the main body 22 is defined as extending between and substantially parallel to the pins 24a, 24b such that in the normal position (fixed position with ski boot fixed) the major axis A is in the forward direction X.

As in FIG. 3 As can be seen, the pins 24a, 24b may be pivotally supported at their rear ends in a rear portion of the main body 22 for providing the frontal release mechanism. For this purpose, in the manner of a ball joint, a rear ball-like end 30a, 30b of each pin 24a, 24b may be inserted in a cup-shaped recess 31a, 31b of the main body 22 adapted thereto.

A control body 32 movable relative to the main body 22 communicates with the pins 24a, 24b via a cam transmission 34 so that a pivotal movement of the pins 24a, 24b is translated into a displacement movement of the control body 32. In the exemplary embodiment, the control cam transmission 34 comprises on each of the pins 24a, 24b a wedge surface 36 which is formed on a wedge element 38 fixedly connected to the respective pin 24a, 24b, and a wedge counter surface 40 formed on the control body 32 which bears against the wedge surface 36, respectively , In FIG. 3 It can be seen that the wedge surface 36 and the wedge mating surface 40 are at an angle (eg, between about 20 ° and about 70 °) to the major axis A and substantially parallel to the Z direction. The wedge surfaces 36 connected to the pins 24a, 24b may, as in FIG FIG. 3 to see outward away from each other and cooperate with inwardly facing wedge counter surfaces 40 of the control body 32.

In a linear guide not shown in the drawings, the control body 32 is guided linearly displaceable on the main body 22, so that it can only move parallel to the main axis A.

On a support portion 42 of the control body 32 are based on two elastic elements 44a, 44b, which are formed in the embodiment as coil springs. Alternatively, however, one or more elastomeric elements or other types of springs may be used to apply a biasing force to the support portion 42 of the control body 32. Longitudinal directions of the coil springs 44a, 44b are substantially parallel to the main axis A and in these directions, the clamping forces of the springs 44a, 44b act on the support portion 42nd

At their ends facing away from the support section 42, the springs 44a, 44b are supported in a support element 46, which is fixed in an adjustable position relative to the main body 22. The support member 46 may be pot-shaped such that it not only provides a bottom portion 48 for supporting the end portions of the springs 44a, 44b and for receiving the tension forces, but also provides lateral guide portions 50 which guide the springs 44a, 44b along a portion of their longitudinal extent lead or support laterally. The support member 46 is held in a longitudinal guide 52 parallel to the main axis A on the main body 22 and a position along the longitudinal guide 52 can be changed by turning an adjusting screw 54. According to the position of the support member 46 along the longitudinal guide 52, a bias of the springs 44a, 44b, be adjusted to influence the release behavior, in particular to set a release torque. During use of the heel unit, i. in particular when the ski boot 14 is used on a downhill run, the support element 46 remains in the set position and is firmly connected to the main body 22 for the time of use. Waiving the adjustment of the bias of the springs 44a, 44b, the springs 44a, 44b could alternatively be supported directly on the main body 22 or a component mounted therein.

In the manner described above, the control body 32 is part of the frontal release mechanism in the force chain between the springs 44a, 44b, and the pins 24a, 24b. According to the invention, the control body 32 is at the same time part of the laterally described side release mechanism and forms a central force transmission element in the force chain between the same springs 44a, 44b and the base body 18th

As in FIGS. 4 and 6 can be seen, the control body 32 has a base portion 18 toward extending cam follower 56 which abuts a cam 58 of the base member 18. The cam follower 56 may be a projecting from the control body 32 pin (a round pin in the embodiment) and may extend from the control body 32 down. Advantageously, the control body 32, including its wedge counter surfaces 40, its support portion 42 and its cam follower 56 may be integral, for example, be made as a molded body or in a machining process, for example, a light metal.

The control cam 58 of the base body 18 is formed on a pin 60 which projects from the base body 18 in the Z direction upwards. On the thus skifesten pin 12, the main body 22 is placed and held pivotable about a Z-axis. For this purpose, a lower bearing portion 64 of the main body 22 with a corresponding circular recess fits the pin 60, so that the main body 22 of the pin 60 on the one hand against tilting can be kept stable and on the other hand, a secure pivotal mounting about the pin 60 is possible.

A locking pin 62, which is held in a bore of the lower bearing portion 64 of the main body 22, engages in a groove 63 of the pin 60, which rotates at least a front peripheral portion of the pin 60. By the positive engagement of the locking pin 62 in the groove 63 of the main body 22 can be securely held on the pin 60 so that it is rotatable about the axis of the pin 60, but still from the pin is peelable.

At an upper, rear portion of the pin 60, this has a recess 66. In the exemplary embodiment, the recess 66 is delimited by two rectilinear side flanks 68a, 68b parallel to the Z axis and a bottom 70. The side flanks 68a, 68b extend at an angle (e.g., between about 20 ° and about 90 °) to the forward direction X and symmetrically sandwich the forward X direction so that the forward direction X corresponds to an angle bisector of the angle included between the side flanks 68a, 68b. In a variant of the invention, the side flanks 68a, 68b may also merge into one another in a straight line (i.e., enclose an angle of 180 ° between them).

With additional reference to the FIGS. 7 and 8 The functions of the heel unit 10 with regard to the frontal release and the side release are explained in more detail below.

FIGS. 1 to 6 show the heel unit 10 both in terms of frontal release as well as in terms of side release in a normal position. In this normal position, the front ends 26a, 26b of the pins 24a, 24b approached by the force of the springs 44a, 44b to such an extent that they abut against a stop, such as a stop 72 of the main body 22.

At the same time push the springs 44a, 44b the cam follower 56 in the formed between the side edges 68a, 68b of the recess 66 deepest point of the cam 58 and hold the main body 22 with respect to its rotational position about the Z-axis in the normal position, in which the main axis A of the Main body 22 along the forward direction X of the heel unit 10 is aligned.

When, for example during a fall, a torque acts on the ski boot 14 about a Y-axis which is greater than one predetermined My-release torque, so the heel portion 16 of the ski boot 14 lifts upwards. Spreading the pins 24a, 24b, these slide out of the notches 28a, 28b of the ski boot 14. In this spreading movement of the pins 24a, 24b, the wedge surfaces 36 of the wedge elements 38 secured to the pins 24a, 24b move away from each other and slide against the wedge faces 40 of the control body 32, so that the control body 32 is displaced to the rear (opposite to the forward direction X). The movement of the control body 32 is opposite to the clamping force of the springs 44a, 44b, which are compressed upon reverse movement of the control body 32. Since the springs 44a, 44b are both supported on the support body 32, acts on the support body 32 as a total clamping force, the sum of the clamping forces of the two individual springs 44a, 44b.

FIG. 7 shows the heel unit 10 in a release position, in which in addition to the later to be described in more detail pivoting of the main body 22 about the Z-axis (side release), the pins 24a, 24b are shown in a Frontalauslösestellung in which they are moved a distance far from each other so that they are lifted from the stop 72 of the main body 22, whereby the control body 32 is pushed back a little way over the wedge surfaces 36 and wedge mating surfaces 40 and the springs 44a, 44b are pressed together a piece.

Upon further movement of the ski boot, finally, the front ends 26a, 26b of the pins 24a, 24b slide out of the sole portion 16 from a lower opening 74 of the recess 28 so that the heel portion 16 is completely disengaged from the pins 24a, 24b. The torque My around the Y-axis, which must act on the ski boot 14 to spread apart the pins 24a, 24b against the force of the springs 44a, 44b so far that the front ends 26a, 26b of the pins 24a, 24b of their Notches 28a, 28b can slide out to trigger the ski boot 14 is referred to as My-release torque. The My-release torque is through the design and the adjustment of the Heel unit 10 predetermined value, in the exemplary embodiment in particular from the angles of the wedge surfaces 36 and the counter wedge surfaces 40 with respect to the main axis A of the main body 22, the clamping force of the springs 44a, 44b and in particular the adjustment of the bias of the springs 44a, 44b in accordance with an adjustable by the adjusting screw 54 position of the support member 46, depends.

If, for example, in the event of a fall, an Mz torque acts on the ski boot 14 about an axis extending in the Z direction or a force corresponding to such a torque in the Y direction on the heel portion 16 of the ski boot 14, then a side release occurs of the ski boot 14 if this Mz torque is greater than or equal to a predetermined Mz release torque. When Mz tripping the main body 22 pivots together with the pins 24 of the in FIGS. 1 to 6 shown in the normal position in which the main axis A of the main body 22 along the forward direction X is aligned, to a in FIGS. 7 and 8 shown side release position, in which the main axis A of the main body 22 at an angle (eg between about 10 ° and about 50 °) is aligned with the forward direction X. During this pivoting movement of the cam follower 56 slides with the main body 22 with pivoting control body 32 on one of the two side edges 68a, 68b of the control cam 58 of the skifesten pin 60 from. In this case, the cam follower 56 and thus the control body 32 is urged back in a direction opposite to the main axis A and thereby pushes the springs 44a, 44b with increasing pivot angle of the main body 22 increasingly together. Thus, a pivotal movement of the main body 22 out of the normal position is opposed in both directions by a resistance force resulting from the springs 44a, 44b.

The tripping behavior and in particular the Mz tripping torque to be overcome for a side release depends on the shape of the control cam 58 and on the tensioning force of the springs 44a, 44b, in particular the total clamping force of the two springs 44a, 44b, which can be changed in the exemplary embodiment by adjusting the position of the support element 46. In this case, the shape of the cam 58 is of particular importance for the determination of the side tripping behavior. By suitable angles of the side flanks 68a, 68b or by a deviating from the embodiment of the control cam 58 namely acting for the side release resistance can be changed independently of the force acting for the frontal release resistance, so that the Mz tripping torque in its value relative to My Trigger torque is fixed. The control cam 58 could also have a curved shape, so that the restoring force does not change linearly to the normal position depending on the rotation angle of the main body 22 about the Z-axis, so as to achieve certain tripping characteristics.

From the above description of the embodiment has become clear that the frontal release and the side release use a common power source in the form of, for example, two parallel springs 44a, 44b. The total clamping force exerted on the common control body 32 by the springs 44a, 44b is used both for the frontal release mechanism to move the pins 24a, 24b to their normal position, i. towards each other, and is also used for the side release mechanism to bias the main body in relation to a pivoting movement about the Z-axis to the normal position. Thus, the total force provided by the springs 44a, 44b can be used twice. Likewise, the control body 32 cooperates with the pins 24a, 24b for frontal release as well as with the pins 60 for lateral triggering in a force- and motion-transmitting manner, so that this central force transmission element can also be used twice.

A first tensioning device formed from the springs 44a, 44b, the control body 32 and the pins 24a, 24b thus has two important Functional units on (springs 44a, 44b and control body 32), which are also part of a second jig for side release, which includes the springs 44a, 44b, the control body 32 and the pin 16 at the same time. In addition to the shared functional units, both clamping devices also comprise separate elements for power transmission, which despite the use of the same power source still allows a simple and reliable individual determination of the Frontalauslöseverhaltens and the Seitenauslöseverhaltens. In the exemplary embodiment, these separate elements of the power transmission chain, in particular the wedge surfaces 36 and wedge counter surfaces 40 for the frontal release and the control cam 58 with cam follower 56 for the side release.

Claims (13)

Heel unit (10) for a binding comprising
a base body (18) to be attached to a board defining a forward direction (X),
a main body (22) movably mounted between a normal position and a side release position on the base body (18),
two adjacently disposed heel-engaging projections (26a, 26b) for engaging recesses (28) of a heel portion (16) of a shoe (14) to fix the shoe (14) to the heel unit (10), the heel-engaging projections (26a, 26b ) in the normal position of the main body (22) substantially in the forward direction (X) of the main body (22) and at least one of the heel engaging projections (26a, 26b) movable relative to the other heel engaging projection (26a, 26b) between a normal position and a frontal release position is
a first tensioning device (44a, 44b, 32, 38) biasing the at least one of the heel-engaging projections (26a, 26b) toward its normal position,
a second tensioner (44a, 44b, 32, 60) biasing the main body (22) toward its normal position,
characterized by an elastic element (44a, 44b) which provides both clamping force for the first clamping device (44a, 44b, 32, 38) and clamping force for the second clamping device (44a, 44b, 32, 60). Heel unit (10) according to claim 1, characterized
in that the first tensioning device (44a, 44b, 32, 38) comprises a first power transmission arrangement (34) which transmits tensioning force from the elastic element (44a, 44b) to at least one of the heel engagement projections (26a, 26b), and
in that the second tensioning device (44a, 44b, 32, 60) comprises a second power transmission arrangement (56, 58), which clamping force of the elastic member (44a, 44b) transmits to the main body (22). Heel unit (10) according to claim 1, characterized
in that the elastic element (44a, 44b) is supported on the one hand on the main body (22) or on a support element (46) fixed in an adjustable position relative to the main body (22) and on the other hand is connected to a control body (32) movable relative to the main body (22) , The heel unit (10) according to claims 2 and 3, characterized in that the first power transmission arrangement (34) comprises a first control cam transmission between the control body (32) and the at least one heel-engaging projection (26a, 26b) and
the second power transmission arrangement (56, 58) comprises a second control cam transmission between the control body (32) and the base body (18). Heel unit (10) according to claim 4, characterized in that the first and / or the second cam transmission comprises a wedge surface (36) and on the wedge surface (36) sliding off wedge counterface (40). Heel unit (10) according to claim 4 or 5, characterized in that the first and / or the second control cam transmission comprises a control cam (58) and on the control cam (58) guided cam follower (56). Heel unit (10) according to claims 4 to 6, characterized in that the base body (18) has an upright pin (60) on which the main body (22) is pivotally mounted,
wherein the control body (32) has a cam follower (56) which is guided on a control cam (58) of the pin (60). Heel unit (10) according to claim 7, characterized in that the control cam (58) in a recess (66) at an upper end of the pin (60) is formed. The heel unit (10) according to any one of the preceding claims, characterized in that at least one of the heel engaging projections (26a, 26b) is formed on a front portion of a pin (24a, 24b), on the pin (24a, 24b) or at one the wedge element (38) is firmly connected to the pin (24a, 24b) and forms a wedge surface (36) which slides on a wedge mating surface 40 of the control body (32) to permit lateral movement of the heel engagement projection (26a, 26b) into movement of the control body (26). 32). Heel unit (10) according to any one of the preceding claims, characterized in that a direction of movement of the elastic element (44a, 44b) extends substantially along a longitudinal axis (A) of the main body (22), which in the normal position of the main body (22) parallel to Forward direction (X) is oriented. An heel counter (10) according to claim 3, characterized in that the control body (32) is guided in the main body (22) in a longitudinal guide for movement parallel to a longitudinal axis (A) of the main body, which in the normal position of the main body (22) parallel to the forward direction (X) is oriented. A heel unit (10) according to any one of the preceding claims, characterized in that the heel unit (10) comprises a plurality of elastic elements (44a, 44b), each of the elastic elements (44a, 44b) providing both clamping force to the first tensioning device (44a, 44b, 32, 38) as well as clamping force for the second tensioning device (44a, 44b, 32, 60). Heel unit (10) according to claim 12, characterized in that the elastic elements (44a, 44b) on the control body (32) are supported as a common control body (32).

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