Patent Application
20190336844
The invention relates to a front jaw for a touring ski binding, comprising a base and an at least one recess or transit opening in the base, lateral sole retainers comprising boot retainer pins which can connect the front jaw to a ski boot, such that when the binding is in a touring mode, the ski boot can pivot in the front jaw about an axis transverse to a longitudinal axis of the binding in the skiing direction. The front jaw also comprises tensioning means for tensioning the sole retainers and, optionally, a latching device using which the sole retainers can be latched in the position in which they are connected to the ski boot.
For ski tourers especially, the weight of the ski together with the binding plays an ever more important role, since every gram saved in weight makes ski touring easier.
Therefore an aspect of the invention is a front jaw for a touring ski binding which has a low inherent weight, is secure, consists of as few individual parts as possible and can be manufactured economically.
One aspect of the invention relates to a front jaw for a touring ski binding, comprising a base with at least one recess or transit opening in the base. The front jaw also comprises two sole retainers comprising boot retainer pins which can engage laterally with corresponding receptacles in the ski boot sole, in order to hold the ski boot in the front jaw during ski touring and preferably also during downhill skiing, such that the ski boot can be pivoted, during ski touring, about an axis which extends through the boot retainer pins and the receptacles of the ski boot sole.
The boot retainer pins can in particular be on two bearing portions which lie opposite each other in relation to a longitudinal axis of the ski and co-operate with the corresponding receptacles on the sides of the ski boot sole facing them and forming a complementary bearing for the bearing portions. The boot retainer pins or bearing portions can be moved into and out of the complementary bearings by pivoting the sole retainers substantially transverse to the longitudinal axis of the ski. In a pivoted-in state, the complementary bearings and the bearing elements accommodated therein define a pivoting axis transverse to the longitudinal axis of the ski and connect the ski boot, such that it can be pivoted in the pivoting axis, to the touring ski binding. In a pivoted-away state, in which the bearing elements no longer engage with the complementary bearings, the touring ski binding is in an opened position, such that the user can step into or out of the touring ski binding.
The front jaw also comprises tensioning means for tensioning the sole retainers and, optionally, a latching device using which the sole retainers can be latched at least for walking. Lastly, the front jaw comprises at least one cover which is made of an elastic material and covers the at least one recess or transit opening in the base, preferably at least substantially completely.
The base is understood here to be a component for a front jaw, which: can be connected to a ski or to a binding plate which can be connected, preferably connected fixedly, to the ski; and is arranged to accommodate the sole retainers and, optionally, to perform other functions.
The base or base body preferably surrounds the at least one recess or transit opening in the shape of a frame, i.e. it encloses it/them completely, preferably with no opening or interruption in the frame-shaped component.
The base for the front jaw can be original-moulded in one part and for example manufactured from a near-non-deformable plastic or a light metal such as aluminium or magnesium, for example in an injection-moulding method or a generative method. The base can also be constructed from multiple materials, i.e. it can for example comprise plastic and/or a metal and/or multiple metals. The plastic can be a reinforced plastic. It can for example be reinforced with glass, carbon, metal or other materials suitable for this purpose. The base can be manufactured off-tool, i.e. such that it does not require subsequent machining or only requires a negligibly small amount of subsequent machining.
The recess can be a substantially level region which is recessed with respect to the remaining geometry of the base and suitable for accommodating the cover. The recess can also constitute a flat, for example cup-shaped recess with a level bottom. The recess can however also be sub-divided by one or more elevations, for example strut-shaped elevations, wherein if there are multiple elevations, the elevations can have a same or lower height as the edge of the recess which connects the bottom of the recess to the upper side of the base.
The cover or covers can (each) be manufactured as a separate part from the base, likewise in one piece, for example from an elastic plastic material such as for example an elastomer, preferably a thermoplastic elastomer such as for example TPU. The cover, or each of the covers, can comprise: a planar cover region which spans the recess/recesses or transit opening/openings of the base and is adapted to the shape of the at least one recess or, respectively, transit opening; and, optionally, connecting elements with which the cover can be connected to the base, preferably in a positive fit and/or in a force fit. The connecting elements can be able to be connected to the base and the cover; the connecting elements are preferably connected to the cover in a material fit and particularly preferably moulded onto the cover during manufacture. The base can have complementary connecting elements with which the connecting elements, which are preferably connected firmly to the cover, can for example engage in order to connect the cover, preferably detachably, to the base or to fasten the cover, preferably detachably, to the base.
In order to connect the cover to the base captively, the cover for the recess can be connected to the base on an upper side of the base facing away from the surface of the ski and/or in the recess. If, as is preferred, the base has the transit opening, a lower side of the base facing the surface of the ski can be connected to the cover (3). If the base or, respectively, the front jaw is connected to the ski, the cover can no longer detach from the base.
In modifications, the base and the cover/covers can be connected to each other in a material fit. The cover/covers can then for example be fused or glued to the base, or the base and cover/covers can for example be jointly original-moulded in a two-component injection-moulding method. In the following, further details of the cover or covers are described on the basis of one cover, in order to keep the description legible. Within the framework of this invention, however, what is described is intended to apply to one or more or all of the covers, if there are multiple covers.
The cover region of the cover preferably does not have any openings but rather forms a closed area. At least an upper side of the cover facing the sole of the boot can have a smooth or very finely structured surface. The material for the cover can in particular be an elastic material which advantageously has water-repellent, snow-repellent, ice-repellent and/or dirt-repellent properties or has a coating which exhibits said properties at least on the upper side facing the ski boot. The surface of the cover can be printable.
On a lower side facing away from the ski boot, the cover can have one or more strut-shaped reinforcements which in particular reinforce(s) an outer, preferably all-round edge and/or the cover region of the cover. When the base is fitted on the ski, an end face of the strut-shaped reinforcements which points away from the lower side of the cover can lie on a surface of the bottom of the recess or ski, such that elastic membrane regions are formed between the reinforcements, wherein said elastic membrane regions can prevent snow, ice or dirt from accumulating on the surface of the cover, in particular while walking in skis, by elastically flexing in and out. This can prevent—more reliably than before—a layer of snow, ice and/or dirt from accumulating underneath the ski boot in the region of the ball of the foot and for example stopping the ski boot from lowering completely onto the ski.
The base can comprise an abutment for a front end of the ski boot. The base can in particular form a base structure for the one abutment, and the abutment itself can be formed from an elastic material which is connected to said base structure, preferably detachably, for example in a positive fit. Forming the abutment from an elastic material has the advantage that it enables production tolerances of the ski boot sole to be automatically compensated for, such that it is possible to easily step into the binding, and the ski boot is firmly accommodated in the binding, independently of any production tolerances of the sole.
The elastic material for the abutment can advantageously be the same material as the cover is produced from. It can be particularly advantageous if the abutment is or can be connected to the cover. It is even more advantageous if the abutment is original-moulded in one piece with the cover or with one of the covers, i.e. for example manufactured in a mould in a thermoplastic injection-moulding method, preferably off-tool.
The abutment can consist of two partial abutments which are spaced from each other in a direction transverse to a longitudinal centre axis of the binding. In this case, each of the partial abutments can respectively comprise an elastic abutment which, as described, preferably consists of the material of the cover and is preferably manufactured in a common mould together with the cover.
The base can comprise two receptacles for two axial bodies, which lie opposite each other in relation to the longitudinal centre axis of the binding and can accommodate axles which are connected to the sole retainers or formed partly by the sole retainers or which can accommodate the sole retainers. The base and the axles, or the axles and the sole retainers, form rotary joints about which the sole retainers can be pivoted from the side onto the ski boot sole and away from the ski boot sole, wherein the axles are preferably arranged substantially parallel to the longitudinal centre axis of the ski binding.
The two sole retainers can be connected to each other or engaged with each other in an additional pivoting joint, at an end facing away from the boot retainer pins, such that the two sole retainers cannot pivot independently of each other. The additional pivoting joint can for example be formed by mutually facing ends of setting elements which are connected to the sole retainers and around which the end of a tensioning lever protrudes in the shape of a fork and which can be jointly raised or lowered, substantially perpendicular to the surface of the ski, by the tensioning lever, wherein each of the sole retainers can comprise a tensioning means, such as for example preferably one spring, which tensions the respective sole retainer into a first and/or second position. The pivoting axis for the additional pivoting joint preferably extends substantially parallel to the central longitudinal axis of the ski binding.
Features of the invention are also described in the aspects formulated below. The aspects are worded in the manner of claims and can substitute for them. Features disclosed in the aspects can also supplement and/or qualify the claims, indicate alternatives with respect to individual features and/or broaden claim features. Bracketed reference signs refer to an example embodiment of the invention which is illustrated below in figures. They do not restrict the features described in the aspects to their literal sense as such, but do conversely indicate preferred ways of realising the respective feature.
In the following, an example embodiment of the invention is explained in more detail on the basis of figures, without thereby limiting the subject-matter to the example embodiment shown. Features essential to the invention which can only be gathered from the figures form part of the scope of the invention and can advantageously develop the subject-matter of the invention.
The four views in
The toe retainer or front jaw of the example embodiment shown is the front jaw of a pin binding and comprises two sole retainers 13, each comprising a pin 14 which can engage with openings formed on a ski boot or, respectively, a ski boot sole, in order to connect a ski to the ski boot. When engaged with the ski boot, the pins 14 define a pivoting axis about which the ski boot, which is held in the front jaw, can be pivoted in a known way while walking or ski touring.
The sole retainer 13 can be pivoted into a first position, in which it releases the ski boot, and into a second position in which it connects front jaws to the ski. The front jaw comprises two spring elements 15 which are respectively assigned exclusively to one of the sole retainers 13 in the example embodiment and which secure the sole retainer in the first and/or second position against being unintentionally released from the respective position.
The sole retainers 13 are held such that they can be pivoted on the front jaw; in the example embodiment, they are held on an axial body 12, both ends of which are mounted in the base 1 of the front jaw. The sole retainers 13 can be pivoted together with the axial body 12 or on the axial body 12 which is mounted non-rotationally, for example in a positive fit, in the base 1, in order to move from the first position to the second position.
A tensioning lever 16 is connected to the base 1, such that it can be pivoted about an axle 8. The tensioning lever 16 comprises a first free end 16a which protrudes along the longitudinal centre axis L of the front jaw towards a tip of the ski (not shown). A second free end 16b of the tensioning lever 16 extends between the ends of the spring elements 15 which lie opposite each other.
The tensioning lever 16 is connected to a securing lever 17 in an additional pivoting axis or fixing axle 11, wherein the securing lever 17 prevents the tensioning lever 16 from being able to detach, such that the sole retainers 13 release the ski boot, when the binding is in the walking position.
When stepping into the binding or front jaw, the tensioning lever 16 and the securing lever 17 form a common lever, the free end 17a of which—being the free end 17a of the securing lever 17 in the skiing direction—has a minimum perpendicular distance with respect to the surface of the ski. When stepping into the front jaw until the sole retainers 13 lock in for downhill skiing in the ski binding, the tensioning lever 16 and the securing lever 17 are jointly pivoted away from the surface of the ski boot. This position is shown in
When the tensioning lever 16 is moved into the downhill skiing position, the ends of the spring elements 15 facing the tensioning lever 16 are pressed upwards, and the two sole retainers 13 and the two pins 14 are thus moved towards each other and moved into engagement with the openings in the ski boot sole. When the tensioning lever 16 is in the downhill skiing position, it is advantageously possible to laterally release the toe retainer in the event of overload.
The base 1 is constructed skeletally and, in the example embodiment, comprises a transit opening 2 which is surrounded by the base 1 in the shape of a frame. In the example embodiment, the transit opening 2 is completely covered by a cover 3 so that no snow, ice or dirt can collect in the transit opening 2. In order to connect the cover 3 to the base 1 captively, it can be glued or fused to it or connected in some other way in a material fit and/or in a force fit and/or in a positive fit. Preferably, however, the cover 3 is connected to the base 1 solely in a positive fit, wherein the lower side 1a of the base 1 comprises one or more receptacles 1b (see
The front jaw also comprises an abutment 5 for a front end of the ski boot brine. The abutment 5 is in particular formed to be elastically deformable, in order to be able to compensate for production tolerances of the ski boot sole. In the example embodiment, the abutment 5 is formed in two parts 5a, 5b and the base 1 forms a base structure 6 to which the abutment 5a, 5b can be connected.
The abutment 5a, 5b is preferably original-moulded in one piece with the cover 3, for example in an injection-moulding method in one mould together with the cover 3, and particularly preferably manufactured from an identical material to the cover 3. The abutment 5, 5a, 5b and the base structure 6 can be connected solely in a positive fit. The abutment 5 and the base structure 6 can instead also be connected in a force fit and/or in a positive fit and in a force fit.
The surface 10 of the cover 3 can have snow-repellent, ice-repellent and/or dirt-repellent properties. These can be provided off-tool, i.e. in the die, and produced for example by specifically heating or cooling certain regions, or induced latterly for example by a heat treatment or other surface treatment, or generated by applying a coating.
The front jaw of the example embodiment is in particular characterised in that it consists—aside from the attachment parts such as the sole retainers 13, the securing lever 17 and the tensioning lever 16—of only two parts, namely the frame-shaped base 1 and the cover 3 comprising the moulded-on abutments 5a, 5b. Moreover, two relatively short spring elements 15 are sufficient in order to securely connect a ski to a ski boot via the sole retainers 13. The front jaw as a whole is a weight-optimised front jaw which exhibits a very low weight, which is advantageous particularly while ski touring uphill.
The tensioning lever 16 and the securing lever 17 are shown separately from each other and can be connected to each other via the fixing axle 11. The base 1 including the base structure 6 is original-moulded in one piece, as is the cover 3 comprising the abutments 5a, 5b, wherein the base 1 is formed from a solid material, for example a light metal or preferably plastic, for example a reinforced plastic, which exhibits similar properties. The cover 3, by contrast, is for example made of an elastic or highly elastic thermoplastic or an elastomer which remains sufficiently elastic even at temperatures of minus 15° C. or less, as are to be expected in snow sports. The cover 3 preferably consists of a thermoplastic elastomer (TPE) such as for example thermoplastic polyurethane (TPU).
The end 16b of the tensioning lever 16 is formed in the shape of a fork. The fork-shaped end 16b protrudes around the setting elements 20, in order to adjust the sole retainers 13 in a region 20a.
The securing lever 17 comprises the locking element 17b which can lock into a locking portion 4a of the complementary locking element 4 in order to secure the front bundle in the walking position.
The cover 3 is connected to the base 1, in a positive fit as is preferred though merely by way of example. Connecting grooves 1b are formed in the lower side 1a of the base 1, wherein an outer circumferential edge 3b of the cover 3 engages with the connecting grooves 1b. The lower side 3d of the cover 3 is flush with the lower side 1a of the base. The cover 3 forms depressions 3m, 3n which allow the cover 3 to act like a membrane in the region of the depressions 3m, 3n and can prevent and/or counteract the adhesion of snow or ice on a surface of the cover 3 facing the ski boot.
In the example embodiment shown, the locking element 17b is guided along a linkage rail 4b comprising multiple elevations 4c, into the locking portion 4a of the complementary locking element 4. The locking element 17b can comprise a rolling body 18 (see
A longitudinal region 3e which extends to the front end of the base 1 in the skiing direction, and at least portions of which have the circumferential edge 3b and, in these portions, the groove 3c, is connected to the planar region 3a. In the portions 3f with no circumferential edge 3b, a sealing area 3g can be formed which abuts the lower side 1a of the base 1, forming a seal, when the front jaw is fitted onto the ski. The longitudinal region 3e of the example embodiment is sub-divided, at its free end, into two parts which protrude around the sides of the complementary locking element 4.
The abutment 5 for the tip of the ski boot is formed at the transition between the planar region 3a and the longitudinal region 3e; in the example embodiment, the abutment 5 consists of the two abutments 5a and 5b. The abutments 5a, 5b project perpendicularly from a surface of the cover 3 facing away from the surface of the ski and each comprise an abutment root 5c, an abutment tip 5d and an connecting lug 5e comprising a transit opening 5f, through which the axial body 8 protrudes, such that the connecting lugs 5e are fixed between the base 1 and the tensioning lever 16, such that the abutments 5a, 5b are also substantially fixed relative to the base 1. At least the abutment root 5c has an edge 5g which corresponds to the circumferential edge 3b and, as already described, engages with a connecting groove of the base 1.
In the example embodiment, the circumferential edge 3b and the groove 3c do not extend as far as the attaching root 5c but rather terminate before that, such that an opening 3h or, respectively, two openings 3h are created directly next to the abutments 5a, 5b. The base 1 can also have a cavity in the region of the openings 3h, such that a lower side 3d of the cover 3 is for example connected to the environment via these openings 3h, as is described in even more detail with respect to
When the cover 3 is compressed by the ski boot, the air trapped in the depressions 3m, 3n can become compressed. When this compression is subsequently released, the air can expand again, preferably abruptly, such that the cover 3 elastically re-assumes its original shape prior to compression. This can prevent—better than before—ice or snow from being able to accumulate in the region of the contact 3.
In the example embodiment, the lower side edge region 3i is narrow in the region of the openings 3h, such that if at least one of the depressions 3m becomes extremely compressed, such that the depression 3m could for example burst, air can flow out in this region and, when the compression is subsequently released, also flow back in.
As can be seen in
In the fitted state, the depressions 3m and 3n and the ski form compressible hollow spaces which act as air cushions. The membrane regions, via which the cover 3 delineates these hollow spaces 3n and 3m upwardly—towards the lower side of the sole of a ski boot held in the front jaw—in the raised planar region 3a, can elastically yield into the respective hollow space 3m and/or 3n. The depth of the hollow spaces and/or depressions 3m and 3n, as measured orthogonally with respect to the lower side 3d of the cover 3, is at least 0.5 mm, or even better at least 1 mm, in advantageous embodiments. Conversely, it is advantageous if the depth is at most 10 mm, or even better at most 8 mm.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2017 120 701.5 | Sep 2017 | DE | national |
This application is a continuation of U.S. patent application Ser. No. 16/124,584, filed Sep. 7, 2018 which claims priority to German Patent Application No. 10 2017 120 701.5, filed Sep. 7, 2017, the contents of such applications being incorporated by reference herein.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16124584 | Sep 2018 | US |
| Child | 16509583 | US |
