Land vehicles – Skates – Shoe attaching means
Patent
1992-11-03
1993-11-02
Focarino, Margaret A.
Land vehicles
Skates
Shoe attaching means
280628, A63C 908
Patent
active
052577988
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a front jaw of a ski binding.
BACKGROUND OF THE INVENTION
Such a front jaw is for example described in EP-A2-0 408 855. The release plate is designed flat in the vertical direction in this known solution. The bearing part has in its lower end section a rearwardly extending projection against which the release plate rests.
This solution is by all means practical, however, it has been found that the flat design of the release plate results in a regressive release behavior of the ski binding when a vertical force is applied. An object of the invention is to provide a front jaw of the above-mentioned type such that the release behavior of the ski binding is linear or slightly progressive.
SUMMARY
The objects and purposes of this invention are met by providing a front jaw for a ski binding having a housing in which is housed a release spring. The release spring loads a pull rod extending through the release spring, which pull rod acts onto the shorter lever arms of two toggle levers through a release plate, which toggle levers are pivotal about vertical axes on a bearing part and the longer lever arms of which toggle levers are designed as sole holders. The bearing part has a through opening for the pull rod and has at its lower end section a rearwardly directed projection for abutment against the release plate. The release plate has at a lower section thereof on a side opposing the bearing part a control surface which, when viewed in a longitudinal cross section, extends upwardly and forwardly. The rearwardly directed projection on the bearing part engages a control surface when an upwardly directed force to the sole holders occurs.
Due to o the fact that the lower section of the release plate has a control surface on its side facing the bearing part and that the control surface, viewed in a side longitudinal cross section, extends upwardly and forwardly, a course of the force action line, which course is favorable for a linear or slightly progressive release behavior of the ski binding, is achieved in cooperation with the rearwardly directed projection of the bearing part. It is possible to design the control surface as a forwardly rising flat surface, however, it has proven to be advantageous to design the control surface of the release plate continuously curved.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages, characteristics and details of the front jaw of the invention will now be described in greater detail in connection with the drawings, in which:
FIG. 1 is a longitudinal cross-sectional view of the front jaw of the invention in the position of the ski binding ready to be stepped into,
FIG. 2 is a cross-sectional view of a detail of the front jaw taken along the line II--II of FIG. 1,
FIG. 3 is an illustration similar to FIG. 2 with a laterally swiveled bearing part,
FIG. 4 is a longitudinal cross-sectional view of part of the front jaw in a slightly upwardly swiveled state,
FIG. 5 is an illustration like FIG. 4, with the sole holders being swiveled farther upwardly, and
FIGS. 4a and 5a each show details of FIGS. 4 and 5 in an enlarged scale.
DETAILED DESCRIPTION
FIG. 1 illustrates a front jaw of the invention in a position in which it is ready to be stepped into. The front jaw has a housing 2 which is fastened to a ski 50 by means of screws 51, which are only schematically indicated. A release spring 40 is housed in the housing 2, the initial tension of which spring can be adjusted in a conventional manner by an adjusting device 43. The release spring 40 is arranged between a spring plate 41 and, with an interpositioning of a bearing sleeve 42, a vertically extending rear crosswall 3 of the housing 2. A pull rod 10 extends coaxially through the center of the release spring 40, one end 11 of the pull rod cooperating with the adjusting device 43 and the other end 12 of the pull rod being connected to an essentially vertically extending release plate 13. The release plate 13 has a control surface 15 at its lower end 14, which control surfa
REFERENCES:
patent: 4372574 (1983-02-01), Svoboda et al.
patent: 4572541 (1986-02-01), Bernard et al.
patent: 5033768 (1991-07-01), Stritzl
patent: 5149124 (1992-09-01), Wittman et al.
Janisch Andreas
Stritzl Karl
Wladar Helmut
Wuerthner Hubert
English Peter C.
Focarino Margaret A.
HTM Sport-und Freizeitgeraete Gesellschaft m.b.H.
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