Heel holder for a downhill skiing or combined downhill skiing and touring binding

Abstract

Heel jaws for a downhill or a combined downhill and touring binding for a ski, with a vertical release function group with a tensioning device with a sole holder and a first spring arrangement (7) for holding a ski boot in the downhill position, furthermore with a horizontal release function group with a base plate (1) that can be positioned on the ski and a carriage (3) that can be deflected laterally against the force of a second spring arrangement (20) relative to the longitudinal direction of the ski, on which the vertical release function group is arranged, and with a pressure spring arrangement acting on the horizontal release function group.The vertical release function group is rotatable on the horizontal release function group about an axis (1a) which runs vertically to the top of the ski or to the vertical on the top of the ski at an angle of up to 5°, such that after a limited lateral deflection of the sled (3) against the force of the second spring arrangement (20) the vertical release function group rotates in the respective lateral release direction to release the ski boot.

Description

[0001] The invention relates to a heel piece for a downhill or a combined downhill and touring binding for a ski, with a vertical release functional group with a tensioning device with a sole holder and a first spring arrangement for holding a ski boot in the downhill position, further with a horizontal release functional group with a base plate that can be positioned on the ski and a carriage that can be deflected laterally against the force of a second spring arrangement relative to the longitudinal direction of the ski and on which the vertical release functional group is arranged.

[0002] Such a heel piece is known, for example, from EP 2 762 211 B1. This heel piece is intended for a combined downhill and touring binding for one ski and has a vertical release function group, a lateral release function group, and a locking mechanism with a locking lever, which locks the heel piece to a ski-fixed guide rail either in the skiing position or in the walking position. The spring arrangement effective during lateral release is clamped in the longitudinal direction of the ski and acts on a roller, which, in the downhill position, engages centrally in a recess on the carriage. The carriage is mounted on guides of the base plate so that it can be deflected exactly transversely to the longitudinal direction of the ski and is held in this position by the aforementioned spring arrangement.When the heel piece is released transversely, the carriage, along with the vertical release function group, moves transversely to the longitudinal direction of the ski on the base plate. The spring assembly is compressed and the base plate's locking mechanism on the guide rail is released. This causes the horizontal release function group, together with the vertical release function group, to move backwards on the base plate in the longitudinal direction of the ski, thus releasing the ski boot inserted into the ski binding. If a pressure force that is high relative to the release force (which is usually independent of the set release force) acts on the clamped ski boot, this can cause the ski boot to become tense, and release of the ski boot may be blocked or impeded.Furthermore, after the locking mechanism is activated in the event of a lateral release and the locking lever is released from its locking position on the ski-fixed guide rail, the base plate must be relocked manually after a lateral release.

[0003] AT 387 154 B discloses a heel piece with a vertical release function group and a horizontal release function group, in which exclusively lateral release is not possible. With each release, for example in the event of a rotational fall, the release spring of the vertical release function group is compressed and a spring-loaded locking lever, which can rotate about a horizontal axis arranged on the sole holder, is pivoted upwards together with the sole holder. This is due to the fact that a vertical control cam is formed on the base plate, on which a roller, which is mounted on the sole holder, is positively guided. This roller lifts the sole holder until the release point of the sole holder is reached. Only then can the heel holder or its bearing block be released and pivot about a vertical axis.

[0004] Heel pieces with the option of lateral and vertical release, especially in combination, are particularly advantageous for reducing the potential risk of serious knee injuries, such as sprained or torn ligaments, in backward twisting falls. The release characteristics of the heel pieces with lateral release and with combined horizontal and vertical release are intended to largely help prevent injuries such as those that can occur in falls while the skier is lying backwards. The heel piece should also ensure comfortable operation when stepping in and out, as well as after a release. In particular, it should avoid the need for cumbersome handling of the heel piece to restore the step-in position, ensuring the most comfortable step-in to the ski binding, especially after falls in deeper snow or steeper terrain.

[0005] The invention is based on the object of providing a heel piece whose release characteristics are designed in such a way that they reduce the risk of knee injuries more than before, without the risk of the ski boot becoming tense in the binding.

[0006] The stated object is achieved according to the invention in that the vertical release functional group on the horizontal release functional group is rotatable about an axis which runs vertically to the top of the ski or to the vertical on the top of the ski at an angle of up to 5°, and has a bearing part which is rotatably mounted on the carriage of the horizontal release functional group and on which the tensioning device of the vertical release functional group is pivotally mounted about a transversely running axis, wherein after a limited lateral deflection of the carriage against the force of the second spring arrangement, the vertical release functional group rotates in the respective lateral release direction to release the ski boot.

[0007] The heel piece according to the invention is therefore capable of ensuring a safe and particularly ergonomic release of the ski boot inserted into the binding during a lateral release or a combined lateral and vertical release, because the movement of the ski boot during a lateral release occurs almost optimally in the direction of the acting forces. This is achieved in particular by the fact that a lateral release occurs in two "phases." In the first phase, a "travel phase," the carriage deflects laterally against the force of the second spring arrangement, absorbing shocks, and the heel piece resets if the lateral deflection remains limited, so that the ski boot does not yet release. The second phase follows when a certain lateral deflection, i.e., the first phase, is exceeded.In the second phase, the vertical release function group rotates relative to the deflected carriage of the horizontal release function group, resulting in a largely unhindered and safe release of the ski boot from the binding. Because the horizontal release function group has a bearing part that is rotatably mounted on the carriage of the horizontal release function group, a particularly compact and functional connection between the vertical release function group and the horizontal release function group is achieved.

[0008] In a preferred design, the vertical release function group can be rotated against the action of the second spring assembly or against the action of another spring assembly. This feature opens up the useful possibility of an "automatic" reset of the horizontal release function group together with the vertical release function group after the ski boot is released as a result of a lateral or combined lateral and vertical release.

[0009] Preferably, the horizontal release functional group further comprises a guide block, which interacts with control elements of the bearing part, such that the vertical release functional group can be rotated to a limited extent in the respective release direction to release the ski boot. This configuration allows the rotational movement of the vertical release functional group relative to the horizontal release functional group to be controlled and limited as desired in a simple and reliable manner.

[0010] A further measure supporting a compact and functional design of the heel piece is that the bearing part has a rotating part which is rotatably arranged on the carriage, wherein the axis which runs vertically to the top of the ski or to the vertical on the top of the ski at an angle of up to 5° runs through the rotating part.

[0011] High forces often act on the heel piece, requiring a stable design of certain components, with the bearing part also being particularly stressed. According to an advantageous embodiment in this regard, the rotating part comprises two parts, in particular circular disk-shaped, that are firmly connected to one another through an opening in the slide. One part is rotatably mounted on a circular or partially circular guide step on the top side of the slide, and the other part is rotatably mounted on a similar guide step on the bottom side of the slide.

[0012] In a preferred, optional embodiment, a return spring acts between the rotating part and the slide, which supports a return of the vertical release functional group relative to the horizontal release functional group and which is preferably a helical compression spring inserted in the area of ​​the guide step of the slide, the ends of which are supported on the rotating part and on the slide in the starting position of the heel jaw.

[0013] A further particularly advantageous embodiment is characterized in that the carriage together with the vertical release functional group on the base plate can be deflected laterally along at least one circular arc-shaped path, wherein the center point of each circular arc-shaped path lies in the area of ​​a toe piece of the ski binding.

[0014] As already mentioned, lateral deflection of the slide preferably occurs against the force of the second spring arrangement. The operative connection between the slide and the second spring arrangement is now realized in a particularly compact and functionally reliable manner, in that the second spring arrangement of the horizontal release functional group is inserted into the base plate and supported at its ends on spring abutments, each of which is gripped externally by a driver provided on the slide. So that upon lateral deflection of the slide, one driver carries one spring abutment with it, compressing the second spring arrangement, and the second spring abutment remains supported on the base part.

[0015] Advantageously, one spring abutment for adjusting the preload of the second spring arrangement is arranged adjustable relative to the base plate by means of an adjusting screw.

[0016] The link guide is specially designed with sections or parts to enable the first phase, "lateral deflection," and the second phase, "rotation," which triggers release, to be carried out in the desired manner via the control elements of the rotating part of the bearing part. Preferably, the link guide has a base section as the outer first section, each of which runs along a common circular arc-shaped path. The center point of the circular arc-shaped path lies in the area of ​​a toe piece of the ski binding, and the control elements of the bearing part of the vertical release functional group rest on these base sections when the heel piece is in the downhill position. As long as the control elements move along the base sections when a lateral force is applied, a rotational movement of the bearing part and thus of the vertical release functional group is not yet possible.

[0017] The "rotation" phase is preferably enabled by further sections of the guide rail, namely by release sections adjoining the base sections, each inclined to the transverse direction, such that the control element of the vertical release functional group entering one of the release sections, depending on the direction of the lateral deflection, releases this functional group to carry out a rotational movement in the respective lateral release direction.

[0018] This rotational movement is, as mentioned, limited; a particularly expedient and advantageous measure in this regard provides that a stop section is connected to the release sections inwards in the direction of the central longitudinal axis of the heel jaw, which stop section prevents continuation of the rotation via the control element which is prevented from further movement, wherein under the effect of the second spring arrangement or the further additional spring arrangement, the horizontal release functional group is returned to the downhill position after a lateral release.

[0019] The guide rail is preferably formed on a cam section located on the upper side of the base plate, either firmly connected to the base plate or formed as a single piece with the base plate. This feature also supports a compact design of the heel piece.

[0020] Preferably, the second spring arrangement, together with the guide rail and the control elements, is designed in such a way that the ratio C of the moments around the tibial axis with the reference measurement set to Ref 1.1 according to ASTM F504 and Ref 1.5 applies C = Ref 1.1 Ref 1.5 where for C, depending on the set DIN Z number according to ISO 9462, the following applies: 0.8 ≤ C ≤ 1.5.

[0021] The invention further relates to a safety ski binding with a toe piece with a heel piece according to one or more of claims 1 to 14, which ski binding is a ski binding designed as a downhill binding or as a combined downhill and touring binding.

[0022] Further features, advantages and details of the invention will now be described in more detail with reference to the drawing, which shows an embodiment of a heel piece of a safety ski binding. Fig. 1 an exploded view of an embodiment of a heel piece according to the invention, Fig. 2a side view of the heel piece in the downhill position, Fig. 3 a top view of the heel piece in the downhill position, Fig. 4 a longitudinal section through the heel jaw along the line IV-IV in Fig. 3 marked cutting plane, Fig. 5 a sectional view according to Fig. 2 cutting plane marked by the line VV, Fig. 6 a sectional view along the line VI-VI in Fig. 2 marked cutting plane, Fig. 7 a view of the top of a base plate and components of a longitudinal adjustment, Fig. 8 a view of the underside of the base plate, Fig. 9 a view of the underside of a slide with further components of the heel piece, Fig. 10 a longitudinal section through the heel jaw analogous to Fig. 4 after a vertical release, Fig. 11an oblique view of the heel piece in a position during a lateral release according to the arrow P 2 , Fig. 12 and Fig. 13 in to Fig. 5 and Fig. 6 analog sectional views of two consecutive stages during a lateral release.

[0023] The heel piece according to the invention is a component of a safety ski binding with a second front retaining element, a toe piece, and together with it holds a ski boot inserted into the safety ski binding. The safety ski binding can be a ski binding designed as a downhill binding or as a combined downhill and touring binding.

[0024] In the description and claims, reference is made to a heel piece mounted on the ski to explain the position of components. Terms such as "top" or "bottom" of components, "forward" or "backward," "top" or "bottom" refer to the orientation of the respective components relative to the ski or the top of the ski, the longitudinal direction of the ski, the transverse direction, or the tip or tail of the ski. The transverse direction is understood to be a direction perpendicular to the longitudinal direction of the ski, while the lateral direction is understood to be the transverse direction or a direction slightly deviating from it, for example, due to a circular arc. For the sake of clarity, a ski has been omitted.

[0025] Based on the Fig. 1 to Fig. 9First, the main components of the heel piece and their relative arrangement will be explained in more detail. The heel piece has several functional groups, each of which includes a number of components. Three of these functional groups are described in more detail below: a vertical release functional group, a horizontal release functional group, and a longitudinal adjustment functional group. The vertical release functional group is operatively connected to the horizontal release functional group, as will be described later.

[0026] The vertical release functional group comprises a tensioning device with a two-part housing 2 comprising a first housing part 2a and a second housing part 2b. The first housing part 2a is provided with a sole holder 5 and a tread 6 and is particularly constructed as a single piece with these two parts. The second housing part 2b provides stiffening, has a pole recess, and, together with the first housing part 2a, accommodates a first spring arrangement 7—one or two helical compression springs—and is placed or pushed onto the first housing part 2a from above, connected to it via a bolt 9 and snap elements, which penetrates a bearing part 10 projecting into the interior of the housing 2. The bearing part 10 consists of a rotating part 11, preferably oriented parallel to the top of the ski, and a control part 12 projecting upwards from the rotating part and into the interior of the housing 2.The rotating part 11 has on its underside, on the edge side and diametrically opposite each other, two control elements 17 projecting downwards towards the top of the ski, the function of which will be described further below.

[0027] One end of the spring arrangement 7 is supported inside the housing part 2a on a spring abutment 14 which is adjustable relative to the housing part 2a by means of an adjusting screw 13, so that the preload of the spring arrangement 7 can be adjusted in a conventional manner. The second end of the spring arrangement 7 acts on a piston slide 15, which is sleeve-shaped, so that the spring arrangement 7 projects into the interior of the piston slide 15. The piston slide 15 is mounted so as to be longitudinally displaceable in the housing 2 and is supported on a control lug 8 formed on the outside of the control part 12 of the bearing part 10. The housing 2 can thus be pivoted relative to the bearing part 10 via the bolt 9 against the force of the spring arrangement 7, with the control lug 8 sliding along a control cam 16 of the piston slide 15, compressing the spring arrangement 7.The control cam 16 is designed such that, both during a vertical release and during the voluntary opening of the heel piece for stepping out of the binding, the housing 2 always pivots completely into the open position. The components of the vertical release functional group are thus responsible for a vertical release of the heel piece as well as a voluntary opening of the heel piece for stepping out of the heel piece and stepping into the heel piece.

[0028] The fully open position of the heel jaw after a vertical release or an arbitrary opening of the heel jaw by pressing down the housing 2 is in Fig. 10 shown.

[0029] The horizontal release function group has as its main components a carriage 3 and a base plate 1. The base plate 1 is located on a ski-fixed rail or binding plate (not shown), its position in the ski's longitudinal direction can be adjusted using the longitudinal adjustment function group. On the underside of the base plate 1, Fig. 1 and Fig. 8 shown guide elements 25 are used, which ensure a largely low-friction guidance of the base plate 1 on the ski-fixed guide rail (not shown).

[0030] The carriage 3 is a largely plate-shaped component and is mounted on the base plate 1 parallel to the top of the ski so that it can be moved laterally, as will be described laterally. The functional connection between the vertical release function group and the horizontal release function group is made via the carriage 3, which has a circular opening 3a ( Fig. 1). The rotating part 11 consists of two circular disk-shaped parts which are firmly connected to one another through the opening 3a in the carriage 3, one part being fixed to a guide step 4 ( Fig. 1 ), the other part on a circular guide step 4 on the underside of the carriage 3 ( Fig. 9 ) is rotatably mounted. In this way, the bearing part 10 and thus the vertical release functional group can be rotated relative to the carriage 3 about an axis 1a running through the center of the rotating part 11 and vertically to the top of the ski. The extent of the rotational movement is limited, as will be described, by the control elements 17, which project downwards through the opening 3a into the area of ​​the base plate 1. The connection between the two parts of the rotating part 11 is achieved by force-fitting, form-fitting, material-fitting, or friction-fitting.

[0031] In a Fig. 1In the optional embodiment shown, the guide stage 4 has a receptacle 4a for a return spring 4b ( Fig. 1 , Fig. 4 ), which in the embodiment shown is a helical compression spring under slight preload, the ends of which are in the initial position of the heel piece ( Fig. 1 ) are supported in particular half on the rotating part 11 and half on the slide 3, here in the area of ​​the guide stage 4. The return spring 4b can also be another spring, such as a leg spring, which, through a corresponding arrangement analogous to the helical compression spring, supports the return of the vertical release functional group after its deflection.

[0032] The further components of the horizontal release functional group include, in particular, a second spring arrangement 20, sliding elements 18 for the slide 3 and a control cam part 29. The base plate 1 has on its upper side a recess 19 extending in the transverse direction, into which the spring arrangement 20 comprising at least one spring, in particular a helical compression spring, is inserted. As in particular Fig. 1 combined with Figs. 5 and 6show, the spring arrangement 20 is supported at one end on a spring abutment 21, which rests against the base plate 1 in the region of one end of the recess 19. The second end of the spring arrangement 20 is supported on an adjustable abutment structure which has a screw nut 22a with a pointer element 22b, these two parts forming the second spring abutment 22. An adjusting screw 23, onto which the screw nut 21 is screwed, allows adjustment of the pre-compression of the spring arrangement 20 and thus the release force in the event of a lateral release, which is described further below, in a manner known per se. The adjusting screw 23 is provided with a circumferential collar 23a, which holds a sleeve 24, which rests against the base plate 1 at the second end of the recess 19 and receives the end of the adjusting screw 23 in such a way that adjustment of the spring preload from the outside is possible.

[0033] At the front and rear ends of the base plate 1, one of the sliding elements 18 is fastened, running transversely across the width of the base plate 1, for example by means of snap connections ( Fig. 7 ). The sliding elements 18 are curved in a circular arc, mirror-symmetrical to the central longitudinal axis of the heel piece, with the common center point of the circular arcs being located in the area of ​​the toe piece of the ski binding (not shown), and the radius of the circular arc of the front of the two sliding elements 18 being in the order of magnitude of approximately 305 mm (basic test sole type A according to ISO 9838:2008, Section 3.5). The circular arc of the rear sliding element 18 is based on a circle with a radius that is larger by approximately the distance between the two sliding elements 18. The carriage 3 is pushed onto the two sliding elements 18 by means of correspondingly designed sliding guides 3b formed on its underside, as shown in Fig. 9 shown. A certain amount of play exists between each sliding guide 3b and the associated sliding element 18, with greater play existing between the rear sliding guide 3b and the associated sliding element 18, thereby preventing distortion or tilting of the slide 3 during lateral movement. The slide 3, together with the vertical release functional group, can thus be deflected laterally relative to the base plate 1 along an overall circular arc-shaped path. This lateral deflection of the slide 3 is only possible against the force of the spring arrangement 20, i.e., by compressing the spring arrangement, as will be described in more detail.

[0034] For example Fig. 9As shown, the carriage 3 has a driver 28 on its underside between its sliding guides 3b, rearward of the opening 3a on each of its lateral longitudinal sides. One driver 28 contacts the spring abutment 21 of the spring arrangement 20 from the outside, and the second driver 28 contacts the sleeve 24 of the adjustable abutment structure from the outside.

[0035] The already mentioned control curve part 29 ( Fig. 1 , 6 and 7 ) is an elongated component which is inserted and fixed in a transverse direction on the upper side of the base plate 1, behind the recess 19 and the spring arrangement 20. In an alternative embodiment, the control cam part 29 is formed integrally with the base plate. The control cam part 29 has a guide slot 30 along its rear edge. According to Fig. 6 and Fig. 12The guide rail 30 is designed mirror-symmetrically with respect to the central longitudinal axis of the heel piece and, in plan view, has two V-shaped guide rail sections 30a in the illustrated embodiment, which adjoin one another in the middle, along the aforementioned longitudinal axis, with the V-tips pointing forward. Each guide rail section 30a therefore consists, viewed from the outside inwards towards the longitudinal axis, of a release section 30a 1 extending at an acute angle α of 35° to 70° to the transverse direction and a release section 30a 1 extending at an obtuse angle β ( Fig. 12) of approximately 95° to 130° to this second inner stop section 30a 2 . Adjoining the release sections 30a 1 in the direction of the lateral edge regions of the base plate 1 are base sections 30b which run along a circular arc-shaped path, wherein the center of the circle of this circular arc-shaped path coincides with the center of the circles of the circular arc shape of the sliding elements 18 ( Fig. 7 ) corresponds. In the downhill position of the heel piece, the control elements 17 of the bearing part 10 of the vertical release function group are located on the base sections 30b, as for example Fig. 6 shows.

[0036] An embodiment of the mentioned functional group longitudinal adjustment is shown in particular Fig. 1 and Fig. 8This functional group comprises a locking bar 26 provided with teeth, which is axially and radially connected to a lever 27 by force-fitting, form-fitting, material-locking, or friction-locking. The lever 27 protrudes beyond the rear of the heel piece and can be brought into and out of engagement with teeth on the guide rail (not shown) in a conventional manner. Two pressure springs 32, oriented parallel to one another and in the longitudinal direction of the ski, are supported on a support 31 provided on the lever 27. These springs are correspondingly supported with their second ends on the underside of the base plate 1.

[0037] The heel piece further comprises a functional group, not shown in detail, comprising a brake device with a ski brake, particularly designed in a known manner and not shown. This functional group is described, for example, in Fig. 1Only one ski brake housing 33 is shown, which is connected to the base plate 1, possibly even being formed as one piece with it. The connection of the ski brake housing 33 to the base plate 1 can be made via snap connections or by force or friction.

[0038] A release of the heel jaw while releasing the ski boot from forces acting in a lateral direction or in a lateral and vertical direction is now described below using the Figures 11 to 13 The starting position, which also corresponds to the downhill position, is shown in the Figures 2 , 3, 5 and 6 The essential movement sequences of the components involved in a lateral release can best be described using the sectional views in Figs. 12 and 13 determine and explain. A first phase of lateral release shows Fig. 12 . For correspondingly large and in the Fig. 12by the arrow P 1 symbolized direction from the inserted ski boot on the sole holder 5 of the vertical release functional group, the carriage 3 is deflected sideways, whereby over the Figure 12 The spring assembly 20 is compressed by the lower driver 28 of the slide 3. The vertical release functional group arranged on the slide 3 is moved along with the slide 3. The control elements 17 of the rotating part 11 initially slide along the base sections 30b of the guide rail 30, corresponding to the lateral release direction.

[0039] The Figure 13 shows the stage of a lateral release in which the spring arrangement 20 has been further compressed by the continued pivoting of the carriage 3 along the sliding element 18 of the base plate 1 and which in Fig. 13The lower control element 17 has passed the edge between the base section 30b and has reached the V-tip of the following guide section 30a and is stopped there. Upon passing the mentioned edge, the rotating part 11 is set for a rotational movement in the direction of the arrow P2 in Fig. 13 The spring assembly 20 is released along with the vertical release function group, and the ski boot is released. The spring assembly 20 is compressed a little further until the stop position is reached – the relevant control element 17 of the bearing part 10 is positioned at the stop section 30a 2 and prevents the rotational movement of the vertical release function group from continuing. The comparatively weak return spring 4a is also compressed or pre-tensioned more during the rotational movement of the rotating part 11. The components of the heel piece involved in this movement sequence are designed and coordinated accordingly. Fig. 13therefore shows the final position of a lateral release. After the ski boot is released, the carriage 3 and therefore the horizontal release function group, along with the vertical release function group, are returned to their original position under the action of the spring assembly 20. The return spring 4a supports the return of the vertical release function group relative to the horizontal release function group.

[0040] Of course, a lateral release can be combined with a vertical release, depending on the moments and forces exerted by the ski boot on the heel piece. With a vertical release, the heel piece or the vertical release function group is moved into the downhill position when the ski boot is reinserted.

[0041] The invention is not limited to the illustrated and described embodiment of the heel piece. For example, the control elements on the rotating part can be provided with rotating rollers or can be formed from rotating rollers. Furthermore, the vertical release functional group can be rotatable against the force of another spring arrangement and can preferably be resettable by the action of this spring arrangement. List of reference numbers

[0042] 1 Base plate 1a Vertical axis 2 Housing 2a, 2b Housing part 3 Slide 3a Opening 3b Sliding guide 4 Guide step 4a Receptacle 4b Return spring 5 Sole holder 6 Foot spur 7 Spring arrangement 8 Control nose 9 Bolt 10 Bearing part 11 Rotating part 12 Control part 13 Adjusting screw 14 Spring abutment 15 Piston slide 16 Control cam 17 Control element 18 Sliding element 19 Recess 20 Spring arrangement 21 Spring abutment 22 Spring abutment 22a Screw nut 22b Pointer element 23 Adjusting screw 23a Collar 24 Sleeve 25 Guide element 26 Latch 27 Lever 28 Driver 29 Control cam part 30 Guide rail 30a Guide rail section 30a 1 Release section 30a 2 Stop section 30bBase section 31Support 32Pressure spring 33Ski brake housing α, βAngle P 1 , P 2 Arrow

Claims

1. Heel holder for a downhill skiing or combined downhill skiing and touring binding for a ski, having a vertical release functional group having a tensioning device having a sole holder and a first spring arrangement (7) for holding a ski boot in the downhill position, further having a horizontal release functional group having a base plate (1) which can be positioned on the ski and a carriage (3) which can be deflected laterally with respect to the longitudinal direction of the ski against the force of a second spring arrangement (20) and on which the vertical release functional group is arranged, and having a pressure spring arrangement which acts on the horizontal release functional group, characterized in that the vertical release functional group on the horizontal release functional group is rotatable about an axis (1a) which extends vertically to the upper side of the ski or vertically to the upper side of the ski at an angle of up to 5° and has a bearing part (10) which is mounted rotatably on the carriage (3) of the horizontal release functional group and on which the tensioning device of the vertical release functional group is mounted pivotably about a transversely extending axis, wherein after a limited lateral deflection of the carriage (3) against the force of the second spring arrangement (20) the vertical release functional group for releasing the ski boot rotates in the respective lateral release direction.

2. Heel holder according to claim 1, characterized in that the vertical release functional group is rotatable against the force of the second spring arrangement (20) or a further spring arrangement and is preferably resettable with the action of this spring arrangement.

3. Heel holder according to claim 1, characterized in that the horizontal release functional group has a slotted guide (30) which interacts with control elements (17) of the bearing part (10) such that the vertical release functional group for releasing the ski boot is rotatable to a limited extent in the respective lateral release direction.

4. Heel holder according to claim 1, characterized in that the bearing part (10) has a rotary part (11) which is arranged rotatably on the carriage (3), wherein the axis (1a) which extends vertically to the upper side of the ski or vertically to the upper side of the ski at an angle of up to 5°, extends through the rotary part (11).

5. Heel holder according to claim 4, characterized in that the rotary part (11) has two in particular circular disc-shaped parts, which are firmly connected to one another through an opening (3a) in the carriage (3), wherein one part is rotatably mounted on a guide step (4) running in a circular or semicircular shape on the upper side of the carriage (3) and the other part is rotatably mounted on such a guide step on the underside of the carriage (3).

6. Heel holder according to claim 4, characterized in that, a restoring spring (4b) acts between the rotary part (11) and the carriage (3), which restoring spring supports a restoring of the vertical release functional group with respect to the horizontal release functional group and which is preferably a helical compression spring which is inserted in the region of the guide step (4) of the carriage (3) and whose ends are supported in each case on the rotary part (11) and on the carriage (3) in the initial position of the heel holder.

7. Heel holder according to one or more of claims 1 to 6, characterized in that the carriage (3), together with the vertical release functional group, can be deflected laterally on the base plate (1) along at least one arcuate path, wherein the center point of each arcuate path lies in the region of a front holder of the ski binding.

8. Heel holder according to one or more of claims 1 to 7, characterized in that the second spring arrangement (20) of the horizontal release functional group is inserted into the base plate (1) running in the transverse direction and is supported with its ends on spring abutments (21, 22) which are each gripped on the outside by a driver (28) provided on the carriage (3), such that, in the event of a lateral deflection of the carriage (3), the one driver (28) drives the one spring abutment (21, 22) with compression of the second spring arrangement (20) and the second spring abutment (21, 22) remains supported on the base part (1).

9. Heel holder according to claim 8, characterized in that one spring abutment (22) is arranged so as to be adjustable with respect to the base plate (1) by means of an adjusting screw (23) in order to adjust the pre-stressing of the second spring arrangement (20).

10. Heel holder according to claim 3, characterized in that the slotted guide (30) has, as outer first sections, a base section (30b) in each case, which base sections (30b) run along a common arcuate path, wherein the center point of the arcuate path lies in the region of a front holder of the ski binding and on which base sections (30b) the control elements (17) of the bearing part (10) of the vertical release functional group lie in the downhill position of the heel holder.

11. Heel holder according to claim 10, characterized in that the slotted guide (30) has release sections (30a1) adjoining the base sections (30b) each running inclined to the transverse direction, such that a control element (17) of the vertical release functional group entering one of the release sections (30a1) releases this functional group for performing a rotational movement in the respective lateral release direction.

12. Heel holder according to one or more of claims 1 to 11, characterized in that a respective stop section (30a2) adjoins the release sections (30a1) in the inward direction in the direction of the central longitudinal axis, such that the rotational movement of the vertical release functional group is stopped and the second spring arrangement (20) or the further additional spring arrangement returns the horizontal release functional group to the downhill position after a lateral release.

13. Heel holder according to one or more of claims 3, 10 or 11, characterized in that the slotted guide (30) is formed on a control cam part (29) located on the top side of the base plate (1), fixedly connected to the base plate (1) or integrally formed with the base plate (1).

14. Heel holder according to one or more of claims 3, 10 or 11, characterized in that the second spring arrangement (20), together with the slotted guide and the control elements (17), is designed such that the following applies to the ratio C of the torques around the tibia axis with the reference measurement Ref 1.1 set according to ASTM F504 and Ref 1.5: C = Ref 1.1 Ref 1.5 Ref 1.1 Ref 1.5 wherein for C, depending on the set DIN Z number according to ISO 9462, the following applies: 0.8 ≤ C ≤ 1.5.

15. Safety ski binding with a front holder and with a heel holder according to one or more of claims 1 to 14, which ski binding is a ski binding designed as a downhill skiing or combined downhill skiing and touring binding.

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