EP3554657B1 - Cross-country set comprised of a cross-country binding and a cross-country ski boot - Google Patents

Description

• - mit einem im Wesentlichen unnachgiebigen Bindungsgrundkörper, welcher eine Aufstandsfläche für eine Sohle des Langlaufschuhs aufweist,
• - mit einer Halteeinrichtung, welche eine Aufnahme zur verschwenkbaren Anordnung des Langlaufschuhs um eine in Querrichtung des Bindungsgrundkörpers verlaufende Schwenkachse aufweist,
• - mit einem elastisch verformbaren Rückstellelement zur Rückstellung des Langlaufschuhs von einer hochgeschwenkten Lage in Richtung der Aufstandsfläche des Bindungsgrundkörpers, wobei das Rückstellelement an der Langlaufbindung angeordnet ist,
  wobei
• - an der Aufstandsfläche des Bindungsgrundkörpers, in Längsrichtung des Bindungsgrundkörpers hinter der Schwenkachse zumindest eine im Wesentlichen unnachgiebige Erhebung vorgesehen ist, mit welcher die Sohle des Langlaufschuhs in deren unbelasteten Zustand in einem Abstand von der Aufstandsfläche des Bindungsgrundkörpers angeordnet ist.

The invention relates to a cross-country ski set with a cross-country ski binding and with a cross-country ski boot, the cross-country ski binding serving for the articulated connection of the cross-country ski boot with a cross-country ski,

• - With an essentially rigid binding body, which has a contact surface for a sole of the cross-country ski boot,
• - With a holding device which has a receptacle for the pivotable arrangement of the cross-country ski boot about a pivot axis running in the transverse direction of the binding base body,
• - With an elastically deformable restoring element for restoring the cross-country ski boot from a pivoted up position in the direction of the contact surface of the binding base body, the restoring element being arranged on the cross-country ski binding,
  in which
• - On the contact surface of the binding body, in the longitudinal direction of the binding body behind the pivot axis, at least one essentially unyielding elevation is provided, with which the sole of the cross-country ski boot is arranged at a distance from the contact surface of the binding body in its unloaded state.

Cross-country bindings of this type have long been known in the prior art. When exercising the skating step, the forward movement is achieved by alternately pushing off sideways with the cross-country skis. The arrangement of the elastic return element, also referred to as a flexor, counteracts the lifting of the heel area of the cross-country ski boot. After pushing off, the cross-country ski is lifted in order to bring the cross-country ski back into the sliding direction. While it is being lifted, the cross-country ski loses contact with the snow surface, which means that the cross-country ski can swing in the air for a short time. If this pendulum swing is too great, the ski shovel and / or the ski end may come into unintentional contact with the snow surface, as a result of which forward movement is disturbed or slowed down. To limit the pendulum movement between ski boots and cross-country skis, was in the EP 1 005 387 B1 proposed to attach a further elastically deformable flexor behind the pivot axis of the cross-country binding in addition to the flexor on the front of the shoe. The flexors are formed by replaceable rubber or rubber molded parts. Such a cross-country ski binding with such a counter-flexor is, for example, from DE 102006041840 A1 known.

The known design with rubber flexors in front of and behind the pivot axis of the cross-country binding is, however, structurally complex, as a result of which the costs for the production of the cross-country binding are increased. In addition, the rear flexor in particular has a tendency to material fatigue, which impairs the function of the cross-country ski binding. Therefore, the prior art requires regular replacement of the rear flexor.

Such a cross-country ski binding is also from the DE 3838586 A1 known. Here, an elastic element is provided which is inserted between the bottom of the groove in the sole and the top of the ski. The thickness of the material is chosen so that it can be compressed when the boot rolls flat on the ski.

From the DE 3915946 A1 a cross-country binding for the articulated connection of a cross-country shoe with a cross-country ski is known. In addition, a raised section is shown in the area of the toe section of the contact area, the front end area of the sole having a step in the toe section that is adapted to the increase in the contact area.

Next to it is from the WO 85/03643 A1 a cross-country ski binding fastened by means of screws is known, in which a cross-country ski boot with a hook located at the front end of the sole and pointing downwards can be hung. When attached, the hook encompasses a traverse and is secured by a bracket.

The object of the invention is to alleviate or avoid the disadvantages of the prior art. The invention therefore sets itself the goal in particular of creating a cross-country binding of the type mentioned at the outset, with which the pendulum movement of the cross-country ski is limited or prevented in a structurally simple and reliable manner after the push-off.

This object is achieved by a cross-country skiing set with the features of claim 1. Preferred embodiments are given in the dependent claims.

According to the invention it is provided that the cross-country ski boot has a hinge pin for pivotable arrangement in the receptacle, and that in the unloaded state the cross-country ski boot is at most approached to the contact surface of the binding base body to an angle different from zero due to the elevation.

In the cross-country ski binding according to the invention, the elevation on the contact surface of the binding base body interacts with the restoring element in order to control the position of the cross-country ski boot relative to the binding base body when the cross-country skiing step is performed. The elastically deformable restoring element ("flexor") is arranged in the longitudinal direction of the binding body in front of the holder of the holding device in order to return the cross-country ski boot towards the contact area during the lifting of the cross-country ski following the push-off process. By pivoting the cross-country ski boot forward into the pivoted-up position, the restoring element is elastically deformed, which is made from a corresponding soft material, in particular a rubber material. The restoring element is preferably arranged releasably on the cross-country ski binding. When the cross-country ski is lifted, the energy stored in the reset element is released, so that the cross-country ski and the cross-country shoe are brought closer to one another. This can cause a pendulum movement of the cross-country ski relative to the cross-country shoe. The extent of the pendulum movement can advantageously be limited by the elevation on the contact surface of the binding base body. Due to the elevation, the cross-country ski boot can in the unloaded state, i.e. before the weight is shifted onto the heel area of the cross-country ski boot, can be approximated at most to an angle different from zero to the contact surface of the binding base body. Accordingly, it can be prevented that the sole of the cross-country ski boot, in the unloaded state, is placed over the entire surface on the contact surface of the binding base body. Depending on the position and height of the elevation, the maximum angle of the pendulum movement of the cross-country ski compared to the cross-country shoe is reduced accordingly. To initiate the next cross-country skiing step, the cross-country ski is placed on the ground. By shifting weight on the heel area of the cross-country ski shoe, the sole of the cross-country ski shoe is pressed against the elevation on the contact area. This causes elastic deformation of the sole of the cross-country ski boot in the area of the elevation on the binding base body, so that the sole of the cross-country ski boot is placed over the entire surface of the contact area of the binding base body against the resistance from the elevation. An effective push-off movement can be initiated from this position, the sole material of the cross-country ski boot being elastically relaxed in the area of the elevation. The elevation on the base body of the binding is designed to be essentially inflexible or rigid with respect to the compressive loads that arise when the sole of the cross-country ski boot is in contact over the entire surface. In use, the elevation is therefore subject to at most minor elastic deformations that are insignificant for the function of the cross-country ski binding. This design is structurally much simpler than that in accordance with FIG EP 1 005 387 B1 prior art described, in which the arrangement of the rear flexor drove up the cost of materials and also made the production of the cross-country binding difficult. The invention also has the advantage that the rear flexor cannot become fatigued. Thus, the function of the cross-country ski binding can be guaranteed over longer periods of use without restrictions. For these reasons, the rear flexor can be dispensed with, the advantages of which are primarily the interchangeability and adjustability of the restoring force.

According to a particularly preferred embodiment, the elevation on the contact area is formed in one piece with the basic binding body. The elevation is accordingly in this embodiment made of the same material as the contact surface of the binding body. The elevation is integrated into the base body of the binding, so that the contact area is continuously continued into the elevation. Advantageously, a particularly simple, inexpensive production of the cross-country ski binding is made possible in this way. In addition, the stability of the cross-country ski binding is not impaired by the formation of the elevation. It is particularly preferred if the basic binding body with the elevation on the contact area is designed as a one-component injection-molded part. As a result, the contact area and the elevation can be manufactured in a single injection molding step. Of course, the binding body can also be provided with further components.

In a further preferred embodiment, the elevation is provided as an insert part on the contact surface of the basic binding body. In this embodiment, the basic binding body is (at least) designed in two parts. The binding base body can have a receiving opening for the insert part, which protrudes upward beyond the contact surface of the binding base body in order to form the elevation.

For the purposes of this disclosure, the location and direction information, such as "above", "below", "front", "rear" etc., refer to the intended use of the cross-country binding on the cross-country ski in its normal horizontal position, with "front" being closer at the tip of the ski and "rear" means closer to the tail.

In order to ensure the rigidity of the elevation against the vertical forces occurring when carrying out the cross-country skiing step, it is advantageous if the elevation on the contact surface of the binding base body is made of a hard plastic material, in particular of acrylonitrile-butadiene-styrene copolymers (ABS), polyamide, preferably fiber-reinforced Polyamide, or from polyoxymethylene (POM), or from a metal, in particular from aluminum, is made. The materials mentioned are particularly suitable for a one-piece design of the basic binding body, in particular in the form of an injection-molded part.

For reasons of stability, it is advantageous if the elevation is provided on a lateral edge area of the contact area of the basic binding body. The arrangement of the elevation on one of the longitudinal edges of the binding body results in an eccentric load transfer between the sole of the cross-country ski boot and the elevation on the binding body.

To increase the torsional stability of the basic binding body, it is advantageous if an elevation is provided in each case on the opposite lateral edge areas of the contact area of the basic binding body. The sole of the cross-country ski boot is advantageously supported on both sides by the elevations on the longitudinal edges of the binding base body when the cross-country ski boot is pivoted downward in the direction of the contact area.

According to a particularly preferred embodiment, the elevation on the contact surface has a front area that rises in the longitudinal direction of the binding body, a rear area that slopes in the longitudinal direction of the binding body and an apex area between the front area and the rear area. Due to this design, the support of the sole of the cross-country ski boot by the elevation increases when the sole is lowered onto the contact surface of the binding base body with elastic deformation through the elevation on the contact area. At the apex area, the elevation has the maximum height, i.e. vertical extent, compared to the adjacent sections of the contact area.

With regard to the state of use, the elevation is preferably arranged under a toe area of the cross-country ski boot. The elevation is preferably arranged adjacent to the pivot axis of the holding device. In order to brace the cross-country ski boot in the unloaded state, i.e. before the runner's weight shifts onto the heel area of the cross-country ski boot, between the elastically deformable restoring element and the elevation on the contact area, it is particularly advantageous if the apex area is at a longitudinal distance of 3 mm to 9 mm , in particular from 5 mm to 7 mm, preferably substantially 6 mm, is spaced from the pivot axis of the holding device.

According to a preferred embodiment, the elevation on the contact surface is curved in a longitudinal section, in particular in the shape of a circular arc. As a result, the course of the counterforce exerted by the elevation on the sole can be adapted in an advantageous manner.

According to a further preferred embodiment, the elevation in the front area has an essentially flat contact surface which is arranged at an obtuse angle to an adjoining front section of the contact area of the binding base body, the elevation in the rear area preferably having an essentially flat flank, which is arranged at an obtuse angle to an adjoining rear section of the contact area of the basic binding body. The flat contact surface in the front region of the elevation is preferably steeper than the flank in the rear region of the elevation, which therefore slopes more flatly towards the adjoining section of the contact surface.

In order to counteract the elastic deformation of the sole when it is pressed against the contact area by the elevation, it is advantageous if the elevation has a maximum extension perpendicular to the main plane of the contact area of the binding body of 0.5 mm to 2.5 mm, preferably 1 mm to 2 mm, in particular of essentially 1.5 mm.

The cross-country ski binding described above can be used with a conventional cross-country ski boot which has a connecting element in the toe area, in particular in the form of a pivot pin, which can be connected to the receptacle of the holding device of the cross-country ski binding. The sole of the cross-country ski boot has a contact area for pressing against the elevation of the cross-country ski binding. The sole is elastically deformable at least in the contact area by the elevation on the contact area when the runner shifts his weight onto the heel area of the cross-country ski boot, so that the sole of the cross-country ski boot moves into an essentially horizontal position with elastic deformation of the contact area by the elevation the footprint is brought. Accordingly, the elastic deformability of the sole of the cross-country ski boot is at least in the contact area by a multiple, in particular by a multiple, higher than that of the elevation on the contact surface, which is therefore essentially inflexible compared to the sole of the cross-country ski boot, ie essentially not elastically deformable by the weight of the runner.

As usual, the cross-country ski binding is mounted in use on a cross-country ski which has a pronounced longitudinal axis which corresponds to the longitudinal direction of the main body of the binding.

• Fig. 1 zeigt schematisch einen Ausschnitt eines Langlaufskis mit einer erfindungsgemäßen Langlaufbindung, welche vor der Schwenkachse ein nachgiebiges Rückstellelement und hinter der Schwenkachse eine unnachgiebige Erhebung zum Hochhalten des Langlaufschuhs (vgl. Fig. 2) aufweist.
• Fig. 2 zeigt den Langlaufschuh an der Langlaufbindung der Fig. 1 im unbelasteten Zustand kurz vor Einleitung der Gleitphase, wobei der Langlaufschuh durch die Erhebung an dem Bindungsgrundkörper in einer gekippten Stellung in Abstand zu der Aufstandsfläche angeordnet ist.
• Fig. 3 zeigt eine Draufsicht auf die Langlaufbindung gemäß Fig. 1, 2.
• Fig. 4 zeigt einen Längsrand der Langlaufbindung in einer wieteren erfindungsgemäßen Ausführungsform, bei welcher die Erhebung an der Aufstandsfläche als Zylindersegment ausgebildet ist.
• Fig. 5 zeigt einen Längsrand der Langlaufbindung in einer weiteren erfindungsgemäßen Ausführungsform, bei welcher die Erhebung an der Aufstandsfläche in Art eines Satteldaches ausgebildet ist.

The invention is explained further below with reference to preferred exemplary embodiments to which, however, it is not intended to be restricted.

• Fig. 1 schematically shows a section of a cross-country ski with a cross-country ski binding according to the invention, which has a resilient return element in front of the pivot axis and an unyielding elevation behind the pivot axis for holding up the cross-country ski boot (cf. Fig. 2 ) having.
• Fig. 2 shows the cross-country ski boot on the cross-country ski binding of the Fig. 1 in the unloaded state shortly before the start of the sliding phase, the cross-country ski boot being arranged in a tilted position at a distance from the contact surface due to the elevation on the binding base body.
• Fig. 3 FIG. 11 shows a plan view of the cross-country ski binding according to FIG Fig. 1, 2 .
• Fig. 4 shows a longitudinal edge of the cross-country ski binding in a further embodiment according to the invention, in which the elevation on the contact area is designed as a cylinder segment.
• Fig. 5 shows a longitudinal edge of the cross-country ski binding in a further embodiment according to the invention, in which the elevation on the contact area is designed in the manner of a gable roof.

In Fig. 1 a cross-country ski binding 1 for the articulated connection of a cross-country ski boot 2 to a cross-country ski 3 is shown. Such Cross-country skiing sets have long been known in the prior art, so that only the features essential to the invention are to be described below.

The cross-country binding 1 has a binding base body 4 which is formed from an essentially rigid (ie non-elastic) material and which has guide webs 21 in a central region. On the upper side, the basic binding body 4 has a contact surface 5 for placing a sole 6 of the cross-country ski boot 2 (cf. Fig. 2 ) on. On the underside, the basic binding body 4 has an essentially flat ski support surface 22 which, in the embodiment shown, is mounted directly on the cross-country ski 3. However, further, in particular plate-shaped assembly elements (not shown) can be provided between the binding base body 4 and the cross-country ski 3. In this case, the ski support surface 22 is indirectly connected to the cross-country ski 3. In addition, as is also well known, the cross-country ski binding 1 has a holding device 7 for releasable connection to the cross-country ski boot 2. The holding device 7 has a receptacle 8 for the pivotable arrangement of a hinge pin 9 of the cross-country ski boot 2 about a pivot axis 10 (cf. Fig. 3 ), which runs in the transverse direction of the binding base body 4 (or in the transverse direction of the cross-country ski 3). For this purpose, the holding device 7 has two displaceably or pivotably mounted hooks 11 which hold the hinge pin 9 in the connected state on the receptacle 8. To release the cross-country ski boot 2, the holding device 7 also has a handle 12 which, in the embodiment shown, is formed by a rotary handle. By turning the rotary handle, the hooks 11 can be pivoted between a release position and a holding position.

In addition, the cross-country ski binding 1 has a return element 13, which in the prior art is often referred to as a flexor. The restoring element 13 consists of an elastically deformable (rubber) material in order to push the cross-country ski boot 2 from a pivoted up position after pushing off (not shown) in the direction of the contact surface 5 of the binding base body 4.

In the embodiment shown, the cross-country binding 1 also has at least one elevation 14 protruding from the contact surface 5 of the binding base 4, which is located behind the pivot axis 10 of the holding device 7, viewed in the longitudinal direction 4a of the binding base 4 from its front end to the rear end. In the embodiment shown, the elevation 14 is arranged completely behind the pivot axis 10 as seen in the longitudinal direction 4a; However, it may be sufficient if the elevation 14 starts in front of the pivot axis 10, but reaches the maximum height (vertical extent) behind the pivot axis 10.

The elevation 14 is essentially inflexible compared to the restoring element 13, so that the underside of the sole 6 of the cross-country ski boot 2 in the unloaded state before the weight is shifted to a heel area of the cross-country ski boot 2 at a distance from the contact surface 5 of the binding base 4 becomes. When the cross-country ski binding 1 is loaded by the weight of the runner, the sole 6 of the cross-country ski boot 2 is brought into full-surface contact (apart from, of course, the gaps between the sole profile) with the contact surface 5 of the base body 4 under elastic deformation in the area of the elevation 14. This embodiment enables a reduction in the pendulum movement of the cross-country ski 3 compared to the cross-country ski boot 1 when the cross-country ski 3 is lifted by not falling below an angle a of, for example, 8 ° to 13 ° between the sole underside of the cross-country ski shoe 2 and the contact surface 5. This is achieved in that the sole 6 is mechanically tensioned between the elevation 14 (for example, lens-shaped in plan view) and the pivot axis 10. The sole 6 is raised slightly by the elevation 14, so that the front area of the sole 6 is pressed against the elastically deformable restoring element 13, whereby an elastic reaction force is generated in the restoring element 13.

In the embodiment shown, the elevation 14 is formed in one piece with the binding base body 4. The binding body 4 is preferably made of a hard plastic material, in particular of acrylonitrile-butadiene-styrene copolymers (ABS), polyamide, preferably made of fiber-reinforced polyamide, or made of Polyoxymethylene (POM), or formed from a metal, in particular from aluminum.

How out Fig. 3 As can be seen, two similar elevations 14 are provided in the embodiment shown, which are arranged on the opposite lateral edge regions 15 of the binding base body 4. This bilateral arrangement of the elevations 14 advantageously results in increased torsional stability, since the forces are built up on both sides, specifically in the direction of the dashed lines 23.

How out Fig. 1, 2 As can be seen, the elevation 14 on the contact surface 5 has a front area 16 that rises in the longitudinal direction of the basic binding body 4, a rear area 17 that slopes backwards in the longitudinal direction of the basic binding body 4 and an apex area 18 between the front area 16 and the rear area 17. The apex region 18 has the maximum vertical extent in relation to the sections 19, 20 of the contact area 5 adjoining the elevation 14.

The apex area 18 is preferably located at a longitudinal distance b of 3 mm to 9 mm, in particular 5 mm to 7 mm, preferably essentially 6 mm, from the pivot axis 10 of the holding device 7 (cf. Fig. 2 ). The elevation 14 preferably has a maximum extension c perpendicular to the main plane of the contact surface 5 of the binding base body 4, ie a height of 0.5 mm to 2.5 mm, preferably 1 mm to 2 mm, in particular essentially 1.5 mm, on (cf. Fig. 4 ). This means that the height of the elevation 14 is shown exaggerated in the drawing.

The elevation 14 can have different geometries, as shown in FIG Figs. 1 to 5 is illustrated.

According to Fig. 1, 2 the elevation 14 in the front area 16 is essentially flat, the front area 16 being arranged at an obtuse angle to an adjoining front section 19 of the contact surface 5 of the binding base body 4. The rear area 17 of the elevation 14 is also in Essentially flat, the rear region 17 being arranged at an obtuse angle to an adjoining rear section 20 of the contact surface 5 of the binding base body 4. The front area 16 is steeper in relation to the ski support surface 22 than the rear area 17 of the elevation 14. The apex area 18 between the front area 16 and the rear area 17 is arcuately curved in the longitudinal section, ie in the section perpendicular to the pivot axis 10.

According to Fig. 4 the elevation 14 on the contact surface 5 is curved in a longitudinal section (ie in a section perpendicular to the pivot axis 10) in an arc shape, in particular in a circular arc shape. As a result, the elevation 14 is formed in the shape of a segment of a cylinder.

According to Fig. 5 the front area 16 and the rear area 17 are each essentially flat, the front area 16 and the rear area 17 being essentially at the same obtuse angle to the front section 19 of the contact area and to the rear section 20 of the contact area 5 on both sides of the elevation 14 are arranged.

Claims (11)

1. Cross-country skiing kit having a cross-country binding (1) and a cross-country boot (2), the cross-country binding (1) being used connect the cross-country boot (2) to a cross-country ski (3) in an articulated manner, comprising

   - a substantially unyielding binding base body (4) that has a standing surface (5) for a sole (6) of the cross-country boot (2),

   - a holding device (7) that has a receptacle (8) for pivotable arrangement of the cross-country boot (2) about a pivot axis (10) extending in the transverse direction of the binding base body (4), and

   - an elastically deformable reset element (13) for resetting the cross-country boot (2) from an upwardly pivoted position in the direction of the standing surface (5) of the binding base body (4), the reset element (13) being arranged on the cross-country binding (1),

   - at least one substantially unyielding elevation (14) being provided on the standing surface (5) of the binding base body (4), behind the pivot axis (10) in the longitudinal direction (4a) of the binding base body (4), by means of which elevation the sole (6) of the cross-country boot (2) is arranged in its unloaded state at a distance from the standing surface (5) of the binding base body (4),

   characterised in that the cross-country boot (2) has a pivot pin (9) for pivotable arrangement in the receptacle (8), and in that, in the unloaded state, the cross-country boot (2) approaches at most an angle other than zero to the standing surface (5) of the binding base body (4), due to the elevation (14).
2. Cross-country skiing kit according to claim 1, characterised in that the elevation (14) on the standing surface (5) is formed in one piece with the binding base body (4).
3. Cross-country skiing kit according to either claim 1 or claim 2, characterised in that the elevation (14) on the standing surface (5) of the binding base body (4) is manufactured from a hard plastics material, in particular from acrylonitrile butadiene styrene copolymers (ABS), polyamide, preferably from fibre-reinforced polyamide, or from polyoxymethylene (POM), or from a metal, in particular aluminium.
4. Cross-country skiing kit according to any of claims 1 to 3, characterised in that the elevation (14) is provided on a lateral edge region (15) of the standing surface (5) of the binding base body (4).
5. Cross-country skiing kit according to claim 4, characterised in that an elevation (14) is provided in each case on the opposite lateral edge regions (15) of the standing surface (5) of the binding base body (4).
6. Cross-country skiing kit according to any of claims 1 to 5, characterised in that the elevation (14) on the standing surface (5) has a front area (16) ascending in the longitudinal direction (4a) of the binding base body (4), a rear area (17) descending in the longitudinal direction of the binding base body (4), and an apex region (18) between the front area (16) and the rear area (17).
7. Cross-country skiing kit according to claim 6, characterised in that the apex area (18) is spaced apart from the pivot axis (10) of the holding device (7) at a longitudinal distance of 3 mm to 9 mm, in particular 5 mm to 7 mm, preferably substantially 6 mm.
8. Cross-country skiing kit according to either claim 6 or claim 7, characterised in that the elevation (14) on the standing surface (5) is curved in an arc shape, in particular a circular arc shape, in the longitudinal cross section.
9. Cross-country skiing kit according to either claim 6 or claim 7, characterised in that the elevation (14) has a substantially flat contact surface in the front area (16), which is arranged at an obtuse angle to an adjoining front section (19) of the standing surface (5) of the binding base body (4), the elevation (14) preferably having a substantially flat flank in the rear area (17), which is arranged at an obtuse angle to an adjoining rear section (20) of the standing surface (5) of the binding base body (4).
10. Cross-country skiing kit according to any of claims 1 to 9, characterised in that the elevation (14) has a maximum extension perpendicular to the primary plane of the standing surface (5) of the binding base body (4) of 0.5 mm to 2.5 mm, preferably 1 mm to 2 mm, in particular substantially 1.5 mm.
11. Cross-country skiing kit according to any of claims 1 to 10, characterised in that the cross-country binding (1) is mounted on a cross-country ski (3).

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