The invention relates to an arrangement for changing the hardness, elasticity or rigidity of a sliding device for snow, which sliding device has a level of convexity which is predetermined during manufacture, having a stiffening device which can be fitted on the sliding device and can be changed, in terms of its action on the sliding device, by a control mechanism. The aim of the invention is, by changing the level of convexity, to be able to adapt the travelling properties of the sliding device to the respective skiing/snowboarding conditions in a particularly effective manner. This aim is achieved according to the invention in that a two-part stiffening device is arranged on the upper side of the sliding device, the sections of said stiffening device being connected to one another at the point of division by means of a spring system, and one section of the stiffening device being in engagement with a control mechanism by means of which the level of convexity of the sliding device, in relation to the non-loaded state thereof, can be set manually in two directions.
A longitudinal-adjusting device (1) for a ski-binding part (7) consists of a guide rail (2) fastened on a ski (3), on which an adjusting plate (5) is guided movably and lockably, which adjusting plate carries the ski-binding part (7). A locking part (10) is supported movably transversely with respect to the longitudinal direction of the ski in the adjusting plate (5), which locking part has locking teeth (12) on the underside, which teeth engage locking teeth (13) on the upper side of the guide rail (2). The locking part (10) is loaded by a spring (15) and has an operating member (18) with two surfaces (22, 23), which rest on a lateral section (21) of the adjusting plate (5).
A front jaw for a safety binding comprising a housing (2,3), which can be fastened on a ski, the housing having a lower part (3) and an upper part (2), and at least one adjustable release spring (4), with two essentially horizontally swingable sole holders (14a, 14b) being arranged in the upper part (2) of the housing, which sole holders are supported on a common, essentially vertically oriented bolt (13), which bolt is loaded by the release spring (4) and is movably guidably arranged in the housing (2, 3) along a rearwardly enlarging guide surface (130) aligned in a longitudinal direction.
A front jaw for a safety binding comprising a lower part (3) of a housing, which lower part can be fastened to a ski, and an upper part (2) of a housing having at least one adjustable release spring (4) and two pivotal sole holders (14a, 14b) biassed by this release spring, with the upper part (2) of the housing being pivotal in the position of use of the front jaw about a transverse axis (Q) extending essentially normally with respect to the central longitudinal axis (L) of the front jaw, and the swivelling capability of the upper part of the housing relative to the lower part of the housing being limited by a locking piece (15, 115) having at least one stop surface (32a.sub.1, 32b.sub.1, 32a.sub.2, 32b.sub.2, 32a.sub.3, 32b.sub.3, 32a.sub.4, 32b.sub.4), which locking piece is supported horizontally movably in the lower part (3) or the upper part (2) of the housing, with this locking piece (15, 115), in the position of use of the ski binding, cooperating with a stop (29a, 29b) provided on the upper part or lower part of the housing, so that the swivelling movement of the upper part of the housing relative to the lower part of the housing is limited in this position.
A front jaw which includes a housing adapted to be fastened to a ski. A release spring is housed in the housing. A spring extends through a pull rod loaded by the release spring. The pull rod acts through a release plate onto the shorter lever arms of two toggle levers pivotally arranged about vertical axes on a bearing part, and the longer lever arms of which are constructed as sole holders for a ski shoe. The bearing part has a through opening for the pull rod and a front facing support surface which rests at least partially on a rear facing crosswall of the housing. The crosswall is contiguous with an approximately horizontally rearwardly extending section, with the front support surface of the bearing part having two sections adjoining one another in elevational direction, the lower section of which defines an obtuse angle (.alpha.) with the upper section, with the rear facing crosswall of the housing extending essentially vertically and with a rearwardly and downwardly inclined surface being contiguous with the upper section of the front support surface. The bearing part consists of an upper element and a lower element, which elements are in the assembled state of use connected form-lockingly with one another, with the support surface being provided on the front side of both elements of the bearing part. The two toggle levers are supported on the lower element.