DE202023102553U1 - Toe piece of a safety ski binding and safety ski binding - Google Patents

Abstract

Front piece of a safety ski binding with a housing (1) that can be arranged fixed to the ski and has a rear housing wall (1b), a release spring that interacts with a tension element (9) and is housed within the housing (1), a central bolt (8) on which a central cutout in the rear housing wall (16) through which the pull element (9) engages and on which two angle levers (10) are pivotably mounted, which can be supported on the outside of the housing (1) during a triggering process or when swiveling out to the side, with the The angle lever (10) can be lifted to a limited extent together with the bolt (8), inner and outer support elements (12, 13) being formed on both sides of the central opening on the rear housing wall (1b), which inner and outer support elements (14, 15), which are formed on the angle levers (10), interact in such a way that when forces act primarily in the lateral direction on the angle levers (10), the outer support elements (15) of the angle levers (10) on the outer support elements (13) of the housing wall (1b) and when forces act in combination upwards and laterally by raising the angle lever, the inner support elements (14) of the angle lever (10) on the inner support elements (12) of the housing wall (1b), each time the angle lever ( 10), characterized in that the mutually interacting outer support elements (13, 15) are two lower and upper flat depressions (13a) positioned one above the other and projections (15a) engaging in these, with one further depression (13b) is formed, which is deeper than the first-mentioned depression (13a), the interacting inner support elements (12, 14) being formed by interlocking groove-like depressions (12a) and web-like projections (14a).

Description

The invention relates to a toe piece of a safety ski binding with a housing that can be fixed to the ski and has a rear housing wall, a release spring that interacts with a tension element and is housed within the housing, a central bolt on which the tension element acts through a central opening in the rear housing wall and on which two angled levers are pivotably mounted, which can be supported on the outside of the housing during a release process or when swiveling out to the side, the angled levers being able to be lifted to a limited extent together with the bolt, with inner and outer Support elements are formed, which interact with inner and outer support elements, which are formed on the angle levers, in such a way that when forces act primarily in the lateral direction on the angle levers, the outer support elements of the angle levers on the outer support elements of the housing wall and in combination upwards and laterally acting forces by raising the angle lever, support the inner support elements of the angle lever on the inner support elements of the housing wall, each time the angle lever swings out. The invention also relates to a safety ski binding with a toe piece and a heel piece.

A toe piece of the type mentioned is, for example, from DE 3742391 A1 known. The toe piece has a sole holder that can be pivoted about two essentially vertical tilting surfaces of a binding housing that are arranged to the side of the vertical central longitudinal plane and that is prestressed against the tilting surfaces by a release spring that acts essentially in the longitudinal direction of the ski and has counter-tilting surfaces Degree of freedom of the shoe sole downwards and/or upwards along the tilting surfaces is limited downwards and/or upwards. The tilting surfaces and tilting counter-surfaces have such a small extension in the vertical direction that these surfaces can disengage by moving the sole holder downwards and/or upwards when the skier leans forward or backwards. Towards the central longitudinal plane, secondary tilting surfaces are arranged next to, above and/or below the primary tilting surfaces, next to the counter-tilting surfaces, secondary counter-tilting surfaces are arranged towards the central longitudinal plane, which when the primary counter-tilting surfaces disengage from the primary tilting surfaces with the Secondary tilting surfaces come into engagement. In the case of a purely lateral release, the primary tilting surfaces that are located further out support one another, with all other release options the secondary tilting surfaces that come into engagement with one another. By placing the ski boot on a spring-loaded sole plate, the sole plate can move downward in a forward fall, so that the inner secondary tilting surfaces then cooperate or engage with each other. This known design is therefore a complex construction overall, which is associated with a certain instability, also because of the spring-supported sole plate.

From the AT 402 696 B a front jaw with a tension element is known, which is mounted with its front end limitedly pivotable about a horizontal transverse axis on a front spring support, against which the release spring is supported to the front. With its rear end, the pull element is mounted on a substantially vertically arranged bearing pin, on which the two angle levers are also pivotably arranged. When swiveling upwards, the angle levers are supported on a substantially transverse edge of the housing and, when swiveling diagonally, on an edge running in the longitudinal direction of the housing. As a result, the reverse and diagonal release takes place via an essentially constant lever arm that is predetermined by the position of these edges, so that the risk of injuries due to increased release forces increases.

In the case of backward rotating falls in particular, there is often a massive increase in the release torque as a result of the greatly increased friction between the ski boot sole and the angle levers, which means that the release force set per Z number on the release spring is exceeded and the risk of injury to a falling skier increases significantly.

The invention is therefore based on the object of providing a particularly simple, stable and particularly reliably functioning technical solution for a toe piece of the type mentioned at the outset, in which the triggering force at least largely corresponds to the desired and set force in the event of backward rotating falls without additional components.

The stated object is achieved according to the invention in that the mutually interacting outer support elements are two lower and upper flat recesses positioned one above the other and projections engaging in these, with a further recess being formed above each recess, which is deeper than the first-mentioned recess, wherein the interacting inner supports elements are formed by interlocking groove-like depressions and web-like projections.

In the event of a backward rotating fall, the support of the outer support elements is canceled by the lifting of the angle levers and the inner support elements of the angle levers are supported on the inner support elements of the housing wall. This increases that lever arm of the angle lever on which the ski boot acts in the lateral direction, and the lateral release moment is reduced accordingly. In this way, the greater friction that occurs between the sole of the ski boot and the angle levers during a backwards rotating fall can be compensated for. This particularly reliable solution requires no additional components, has no effect on the weight of the toe piece and is technically easy to implement. Due to the fact that the mutually interacting outer support elements are two lower and upper flat depressions positioned one above the other and projections engaging in these, with a further depression being formed above each depression, which is deeper than the first-mentioned depression, one of the angle levers in the Downhill position particularly well-stabilizing mutual support of the interacting support elements is ensured, with a high level of functional reliability being guaranteed with lateral and rearward/lateral release. The upper, deeper indentations ensure that when forces are acting upwards and laterally, for example in the event of a backwards rotating fall, the lifting of the angle lever relieves the outer support elements of their function and that the inner support elements interact with a correspondingly reduced triggering force. The inner support elements that interact with one another are designed in a particularly simple and functional manner, in that they are formed by interlocking groove-like depressions and web-like projections.

In a preferred embodiment, the indentations are formed on the rear housing wall and the projections on the angle levers. In an alternative embodiment, the arrangement is reversed, the recesses are provided on the angle levers, the projections on the rear housing wall.

In a preferred embodiment, the groove-like depressions are formed on the rear housing wall and the web-like projections are formed on the angle levers. In an alternative embodiment, provision is made for the groove-like depressions to be formed on the angle levers and the web-like projections to be formed on the rear housing wall.

The inner support elements that interact with one another and the outer support elements that interact with one another are each designed to be inclined backwards together at identical acute angles and thus form common pivot axes, which at the mentioned acute angle range from 5° to 25°, in particular 15°, relative to the vertical, inclined backwards. This ensures that in the downhill position, the pretension of the release spring(s) acts on the set of angle levers in the direction of the top of the ski and is stabilized accordingly.

As mentioned, the angle levers can be raised together with their bolts to a limited extent. This lifting movement thus takes place when forces act upwards on the angle lever, ie, for example, when the skier falls backwards while rotating. It ensures that the outer support elements can no longer interact and the inner support elements come into effect. This lifting movement of the angled levers is limited to a movement path of in particular 4.00 mm to 7.00 mm, with a particularly preferred embodiment having a projection formed on the housing as a stop limiting the lifting movement of the angled levers.

The invention also relates to a safety ski binding with a toe piece and a heel piece, in which the toe piece is designed according to one or more of claims 1 to 5.

• 1 eine Draufsicht auf den Vorderbacken,
• 2 eine Seitenansicht des Vorderbackens,
• 3 einen Längsschnitt durch den Vorderbacken entlang der Linie III-III der 1,
• 4 einen Längsschnitt durch den Vorderbacken entlang der Linie IV-IV der 1,
• 5 eine Ansicht des Backens mit weggelassenen Winkelhebeln, gemäß der durch die Pfeile P₁ in 1 gekennzeichneten Sichtrichtung,
• 6 eine Sicht auf die Winkelhebel gemäß der durch die Pfeile P₂ in 1 gekennzeichneten Sichtrichtung,
• 7 den Vorderbacken in einer zu 4 analogen Schnittansicht, jedoch mit einer Stellung der Winkelhebel bei einer nach oben (aufwärts) wirkenden Kraft,
• 8 eine Schnittdarstellung gemäß der Linie VIII-VIII der 4,
• 9 eine Schnittdarstellung gemäß der Linie IX-IX der 7 mit einer Stellung der Winkelhebel bei einer oben (aufwärts) wirkenden Kraft.

Further features, advantages and details of the invention will now be described in more detail with reference to the drawing, which shows an exemplary embodiment of a toe piece of a safety ski binding. show it
1 until 4 and 8th Views and sectional views of the toe piece of a safety ski binding in one position without a ski boot inserted,

• 1 a top view of the toe piece,
• 2 a side view of the toe piece,
• 3 a longitudinal section through the front piece along the line III-III of 1 ,
• 4 a longitudinal section through the front piece along the line IV-IV of the 1 ,
• 5 a view of the jaw with the bell cranks omitted, according to the direction indicated by the arrows P ₁ in 1 marked line of sight,
• 6 a view of the bellcranks according to the direction indicated by the arrows P ₂ in 1 marked line of sight,
• 7 the front cheeks in one 4 analogous sectional view, but with a position of the angle lever with an upward (upwards) acting force,
• 8th a sectional view along line VIII-VIII of 4 ,
• 9 a sectional view along line IX-IX of 7 with a position of the bellcranks with an upward (upward) acting force.

The designations used in the following description such as top, bottom, front, back, upwards. Vertical, horizontal, transversal and the like refer to the position of the toe piece mounted on a ski or the upper side of the ski and the length of the ski. Components which are not directly relevant to the invention but are illustrated are either not described or merely mentioned.

The particular in the 1 until 4 , 7 and 8th The front jaw shown has a housing 1, which is fastened to a base plate 2, which is arranged on the ski, which is not shown, and is pushed onto a rail system, for example. The housing 1 has a housing upper part 1a, a rear housing wall 1b and a front housing wall 1c. In the housing 1 there is a release spring 3, alternatively there are two release springs arranged one inside the other in the housing 1, which are each helical compression springs through which a rod 4 passes in the middle or are. The release spring 3 is supported under pretension on a front spring abutment 5 and a rear spring abutment 6 . The front spring abutment 5 is mounted on the rod 4 so that it can be displaced longitudinally and is firmly connected to a tension element 9 which is guided below the rod 4 backwards to a bolt 8 . An external thread formed on the rod 4 engages with an internal thread of the rear spring abutment 6 held longitudinally displaceably on the housing 1, so that the prestressing of the release spring 3 can be adjusted in a known manner by rotating the rod 4. A display device 7 which can be implemented in a manner known per se and is slidably arranged on the rod 4 in front of the rear spring abutment 6 allows the set triggering force to be read off via a window and a scale on the housing upper part 1a.

The toe piece also has two, one inner and one outer arm 10a, 10b ( 1 ) Having angle levers 10, which are designed in particular in a known manner such that they can overlap the edge at the front end of the sole of a ski boot from the front and side from above. When the ski boot is inserted, sliding rollers 10c rotatably mounted on the outer edge regions of the angle lever 10 come into contact with the outer lateral edge regions of the ski boot sole. How in particular 3 shows, the two angle levers 10 are pivoted together about a central vertical axis formed by the bolt 8 . For this purpose, the end regions of the inner arms 10a of the angle levers 10 are provided with pairs of bearing brackets 11a, 11b, through which the bolt 8 passes, one above the other and offset from one another. Between the two upper bearing brackets 11a and the two lower bearing brackets 11b, the pulling element 9 is mounted with its rear end area on the bolt 8 ( 3 ). Pivoting the angle lever 10 causes - with simultaneous support of the angle lever 10 on the rear housing wall 1b, as will be described below - to compress the release spring 3. A release or recess in the rear housing wall 1b allows a corresponding unhindered arrangement of the bearing brackets 11a, 11b of the Angle lever 10, the end of the rod 4 located here and the tension element 9. The bolt 8 connects the angle lever 10 and the tension element 9 to one another and is otherwise not connected to any other component of the toe piece. The angle levers 10 can be raised or moved vertically relative to the housing 1 together with the bolt 8 and the tension element 9 . Like for example 4 and 7 show, a projection 1d on the rear end area of the upper housing part 1a limits this vertical movement. The movement path a ( 4 ) in the vertical direction is in particular 4.00 mm to 7.00 mm.

How in particular 5 , 6 and 8th show, inner and outer support members 12, 13 are formed on both sides of the central cutout on the outside of the rear housing wall 1b, which inner and outer support members 14, 15, which are formed on the front sides of the bell crank 10 ( 6 ), work together. The rear housing wall 1b and the front sides of the angle lever 10 are at least in those areas where the inner and outer support elements 12, 13 and 14, 15 are formed, at matching acute angles α of preferably 5° to 25°, in particular 15° ( 4 ), relative to the vertical - related to a toe piece mounted on the ski - inclined backwards.

In the embodiment shown, the two inner support elements 12 on the rear housing wall 1b are groove-like depressions 12a formed to the side of the central opening and along the height of the wall 1b, which therefore run along the housing wall 1b at an angle α. The outer support elements 13 are laterally outside the inner support elements 12 formed lower and upper shallow recesses 13a positioned one on top of the other. Above each depression 13a is a further depression 13b ( 5 ) is formed, these depressions 13b being deeper than the depressions 13a. The indentations 13a and 13b adjoin one another alternately in the vertical extension of the housing wall 1b.

The inner support elements 14 on the angle levers 10 which interact with the inner support elements 12 on the rear housing wall 1b are web-like projections 14a which are adapted to the groove-like inner support elements 12 in terms of their configuration. The outer support members 15 are paired projections 15a ( 6 ). When the ski boot is not inserted in the toe and when the ski boot is inserted (downhill position)—possibly in a slightly raised position of the angle lever 10—the bar-like projections 15a engage in the groove-like depressions 13a, the projections 14a are supported in the depressions 12a. The preloaded release spring 3 also presses the angle lever 8 into this position ( 1 until 4 ).

The supporting elements 14, 15 interacting with the supporting elements 12, 13 form internal vertical axes 18 and external vertical axes 17 (indicated in Fig 5 and 6 ), To which, as will be described below, the angle lever 10 can pivot under support.

In the event of a lateral release, for example as a result of a lateral impact acting on the ski boot, the set of angle levers is pulled downwards by the spring preload, the angle lever 10 loaded by the ski boot is supported with its outer support element 15 on the associated outer support element 13, via the one pulled backwards Tension element 9, the release spring 3 is compressed, the ski boot is finally released.

If the skier gets into a lateral supine position, as can be the case, for example, in a backwards twisting fall, the ski boot presses the angle lever 10 upwards, compressing the release spring 3, with the projection 1d limiting this movement ( 7 ). The projections 15a of the outer support elements 15 slide into the depressions 13b and therefore lose contact with their support in the depressions 13a ( 9 ), so that the angle lever 10 claimed by the ski boot pivots about the vertical axis 18 in question formed by the mutually engaged inner support elements 12, 14 while compressing the release spring 3, the ski boot is finally released.

The vertical axes 18 lying further inward than the vertical axes 17 therefore cause a release force that is reduced by the lengthened lever on the angle lever 10 . A corresponding design and arrangement of the inner and outer support elements 12, 13 as well as the inner and outer support elements 14, 15 can ensure that the triggering force reduced in this way compensates for the higher friction occurring between the angle levers 10 and the ski boot as a result of the skier lying on his back .

Reference List

1

Housing

1a

housing top

1b

rear housing wall

1c

front housing wall

1d

head Start

2

base plate

3

release spring

4

pole

5

front spring abutment

6

rear spring abutment

7

display device

8th

bolt

9

tension element

10

bell crank

10a, 10b

poor

10c

sliding roller

11a, 11b

bearing tab

12, 14

inner support elements

13, 15

outer support elements

12a

groove-like indentation

13a, 13b

deepening

14a

ridge-like projection

15a

head Start

17, 18

vertical axis

a

movement path

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 3742391 A1 [0002]
• AT 402696 B [0003]

Claims (6)

Front piece of a safety ski binding with a housing (1) that can be arranged fixed to the ski and has a rear housing wall (1b), a release spring that interacts with a tension element (9) and is housed within the housing (1), a central bolt (8) on which a central cutout in the rear housing wall (16) through which the pull element (9) engages and on which two angle levers (10) are pivotably mounted, which can be supported on the outside of the housing (1) during a triggering process or when swiveling out to the side, with the The angle lever (10) can be lifted to a limited extent together with the bolt (8), inner and outer support elements (12, 13) being formed on both sides of the central opening on the rear housing wall (1b), which inner and outer support elements (14, 15), which are formed on the angle levers (10), interact in such a way that when forces act primarily in the lateral direction on the angle levers (10), the outer support elements (15) of the angle levers (10) on the outer support elements (13) of the housing wall (1b) and when forces act in combination upwards and laterally by raising the angle lever, the inner support elements (14) of the angle lever (10) on the inner support elements (12) of the housing wall (1b), each time the angle lever ( 10), characterized in that the mutually cooperating outer support elements (13, 15) are in each case two lower and upper flat recesses (13a) positioned one above the other and projections (15a) engaging in these, with one further depression (13b) is formed, which is deeper than the first-mentioned depression (13a), the interacting inner support elements (12, 14) being formed by interlocking groove-like depressions (12a) and web-like projections (14a). toe pieces claim 1 , characterized in that the inner supporting elements (12, 14) interacting with one another and the outer supporting elements (13, 15) interacting with one another form pivot axes (18, 17) which are at correspondingly acute angles (α) of 5° to 25°, in particular 15°, relative to the vertical - in relation to a toe piece mounted on a ski - are inclined backwards. toe pieces claim 1 or 2 , characterized in that the housing (1) has a housing upper part (1b) on which a projection (1d) limiting the lifting movement of the angle levers (10) to in particular 4.00 mm to 7.00 mm is provided in the direction of the angle levers (10). . toe piece claim 1 , characterized in that the depressions (13a, 13b) on the rear housing wall (1b) and the projections (15a) on the angle levers (10) are formed. toe pieces claim 1 , characterized in that the groove-like depressions (12a) on the rear housing wall (1b) and the web-like projections (14a) are formed on the angle levers (10). Safety ski binding with a toe piece and a heel piece, characterized in that the toe piece according to one or more of Claims 1 until 5 is trained.

Images