EP0256107B1 - Safety ski binding - Google Patents

Abstract

Safety ski binding, in particular a heel support (2, 102) with a base plate (3, 103) to be secured to the upper surface of the ski and carrying a vertical rotary pin (4, 104). The heel support (2, 102) is provided with a sole support (6, 106) which can be pivoted upwards against a releasable catch and with a support plate (8, 108) which can pivot around a vertical axis, for the heel (10a) of the ski-boot (10, 110). The support plate (8, 108) is subjected to the pressure of a spring (121) in its central position. In order to be able, in such a ski binding, to locate the rotation axis for the ski-boot (10, 110) roughly in the extension of the tibia and at the same time simplify the design of the ski binding, it is proposed that the rotary pin (4), when viewed in the longitudinal direction of the ski, is located between the front jaw (5) and heel support (2), that the support plate (8) is pivotally supported on the rotary pin (4). By means of a guide mechanism formed of a roller (155) and guide curve (156) the heel support (102) is opened in a horizontal release process. According to the invention, the roller (155) is supported by means of its axis running in the longitudinal direction of the ski in the base plate (103), which cooperates with a guide element (156) which can actuate the releasable catch of the heel support (102). In addition, the support plate (8') can also be designed as a sole plate.

Description

The invention relates to a safety ski binding, in particular a heel holder, according to the preamble of claim 1.

Such a heel holder is described in AT-A2-296.111. In this heel holder, a jaw body is rotatably mounted on the pivot, to which a support plate and a sole holder are articulated. This design does not fully take into account the geometric requirements of a ski binding in that the axis of rotation for the ski boot placed on the support plate is not in the extension of the shin axis. However, this means that the maximum permissible torque of the shin cannot be set precisely.

The object of the invention is to eliminate the disadvantages of the known design and to create a safety ski binding in which the axis of rotation for the ski boot extends approximately. Shin axis and is simple in its structure.

Starting from a ski binding according to the preamble of claim 1, this object is achieved by the features of the characterizing part of this claim. The fact that the support plate and not the jaw body is pivotally mounted on the pivot of the base plate ensures an adjustable load on the shin. On the other hand, the role and the control curve allow the course of the return force for the support plate to be adapted more precisely to the respective requirements than is the case with a compression spring arranged in a transverse recess of the support plate (see AT-A2-296.111, Fig. 5).

From DE-A1-34 45 760 the existence of a pivot pin on the base plate between the toe and the heel holder, on which a support plate designed as a continuous sole plate is pivotably mounted, is known. However, this sole plate is formed in two parts, the first part being mounted on the pivot and the two parts of the sole plate being able to be pivoted together about the latter. The second part is frame-like in relation to the first part and can additionally be pivoted up about a transverse axis mounted in the first part. This configuration of the support plate designed as a sole plate is thus costly and labor-intensive.

From DE-A1-23 40 420, which discloses a non-generic heel holder, the control device, which urges the support plate into its central position, in connection with a spring arranged in the longitudinal direction of the ski, as well as a roller, which interacts with a control cam, is known. However, this heel holder has no support plate on which the ski boot would be supported with its sole, at least in the heel area. Rather, in this known embodiment, the separate plate is provided for mounting the heel holder which can be pivoted about a vertical axis; The heel of the ski boot rests on a ski-fixed component in all of the illustrated embodiments of this publication. The control device thus only determines the pivoting capacity of the heel holder in the horizontal plane, the heel of the ski shoe rubbing against the ski-fixed component. A measure to arrange the axis of rotation for the ski boot approximately in the extended shin axis cannot be taken from this document.

From DE-A1-28 51 634 it is in turn known to arrange the role of the control mechanism on a support plate which is designed parallel to the sole plate. However, the axis of this roller runs transversely to the longitudinal axis of the ski, the roller interacting with an exposed, V-shaped control cam. This results in snow, ice or the like. easily contaminants that prevent precise control.

The last part feature of claim 1, which is new in itself, achieves the effect that a relative movement takes place in the longitudinal direction of the ski when the support plate is pivoted laterally between components which are assigned to the support plate and to the bearing block on the one hand. In this way, the heel holder is opened by a purely lateral pivoting of the support plate. This measure can be implemented in various embodiments, as can be seen from the claims that follow later.

The measure of claim 2 determines the position of the heel of the ski boot on the support plate in a particularly advantageous manner, and ensures a defined position of the ski shoe on the support plate during the entire horizontal release process. However, there is also the possibility of having the stop arranged on the support plate engage in a groove in the front region of the sole of the ski boot, as stated in claim 3. The features known from DE-A1-34 45 760 appear in the classifying part of this claim. This construction combines the function of the toe piece with that of the stop.

Various solutions are available for the specific design of the control of the heel holder. According to claims 4, 5 and 7, a heel holder with a suspension fork is used, which heel holder is disclosed, for example, in "Tech 60", technical manual from the company Tyrolia 1979.

The invention thus also relates to the design of a safety ski binding with a base plate fastened to the top of the ski and carrying a vertical pivot, on which a sole plate is pivotably mounted, which is urged into its central position by a spring, which either has a shell jaw at its front end for receiving the front of a shoe or engages with a stop in the shoe sole, and which carries a heel holder of the type mentioned at its rear end.

A binding with a sole plate, which has a non-releasing toe piece at its front end region, is described, for example, in ATPS 330.632. In this binding, a control or locking device is provided for the locking of the heel holder and the sole plate, which is located on an extension of the sole plate. Since the heel holder triggers both a forward fall and a turning fall of the skier, the sole plate must be pivotable both about a vertical axis and also about a transverse axis. However, the tilting movement presents difficulties with regard to the mounting of the sole plate on the vertical axis.

Another disadvantage is that, due to the special design of the control or locking device, there are strict limits to precise adjustment to horizontal and vertical releases. In addition, the construction of the entire binding is somewhat oversized due to the construction (high weight).

The object of the invention is also to eliminate these disadvantages and also to enable a compact structure in the case of a binding of this type.

This object is achieved primarily by the features of claim 4. Because the control element is attached to the suspension fork, the designer can determine the controlled triggering process in a particularly simple manner. Furthermore, this configuration requires a very small amount of friction work to release the binding.

In the solution characterized in claim 5, in which a front jaw provided with a support plate forms the ski binding with said heel holder, the same structural advantages are achieved as in the embodiment according to claim 4.

For the determination of the control of the triggering process, the features of claim 6 can also be used for both embodiments according to claims 4 and 5.

In the variant according to claim 7, the pivoting arrangement of the control element on the suspension fork simplifies its design, furthermore a tension spring is used instead of a compression spring for the return spring for the bearing block. This last makes it possible to reduce the length dimension of the heel holder. Claims 9 and 10 protect advantageous developments of this embodiment. The release of the ski boot in the event of a forward fall is made even easier by the features of claim 10.

In the drawing, for example, embodiments of the subject matter of the invention are shown. Fig. 1 shows the basic structure of a ski binding according to the invention and Fig. 2 shows a variant thereof, each in elevation. In Fig. 3 is a partially sectioned side view of a first specific embodiment of a heel holder controlled according to the invention in the driving position, in Fig. 4 is a section along the line IV-IV in Fig. 3, omitting the details of the spring housing. 5 to 7 show another embodiment of a ski binding in a side view or in a partially sectioned top view (both views in the driving position), and in a partially sectioned top view in the event of a skid of the skier. 5a shows a variant of the embodiment according to FIG. 5. In FIG. 8, the heel holder according to the invention is equipped with a continuous sole plate as a support plate. 9 and 10 another embodiment is shown in a partially sectioned side view.

For the sake of a better overview, the same reference numbers have been used for the individual embodiments, with the exception of FIGS. 2 and 5a, for the same components, but in an increasing order of hundreds. 2 and 5a, reference numerals with a dash (') have been used to differentiate from the embodiment according to FIGS. 1 and 5, respectively.

In Fig. 1, 1 denotes a ski, 5 a toe and 2 a heel holder in its entirety. The latter is fastened to the upper side of the ski la by means of a base plate 3, which is provided with a vertical pivot pin 4, and is equipped with a sole holder 6 and with a step spur 7. On the pivot 4, a support plate 8 is pivotally mounted, on which the heel holder 2 is slidably mounted in the longitudinal direction. The end of the support plate 8 is secured by a hold-down device 9 against lifting from the top la of the ski 1. At the front end of the support plate 8 there is a stop 8a for the heel 10a of the ski boot 10, the toe piece 5 holding the ski boot sole down. The front end of the sole of the ski boot 10 lies on a base plate 11, which is made of low-friction material in a known manner or at least has such a material or material coating on its upper side and is designed as a sliding plate. The support plate 8 is held in its central position by a spring which is not visible in FIG. 1.

The embodiment according to FIG. 2 differs from that shown in FIG. 1 in that the support plate is extended towards the ski tip and forms a kind of sole plate 8 ', the stop 8'a in a groove 10'c of the sole 10'b of the shoe 10 'engages. On the upper side of the ski 1 ', a base plate 11' made of low-friction material and having a hold-down device 9'a is fastened, in which hold-down device 9'a an extension 8 'which is formed at the front end and on the lower side of the sole plate 8' and has a guide. d intervenes.

The function of the entire ski binding according to FIGS. 1 and 2 is in principle the same, with the release of the ski boot 10, 10 'both in the case of a pure forward lunge and also in the case of a pure camber and thus also in the case of a combined one Forward lintel is initiated by the heel holder 2. When the skier falls forward, the heel holder 2 opens in a known manner. In the event of a fall, the support plate 8 or the sole plate 8 'is pivoted about the pivot 4, the heel holder 2 being displaced in the longitudinal direction relative to the support or sole plate 8, 8' and triggered by a control mechanism to be described later.

3 and 4, a base plate 103 and a hold-down device 109 are attached to a ski 101. The base plate 103 carries a pivot 104 which runs perpendicular to the upper side of the ski and on which a support plate 108 is pivotably mounted. The support plate 108 is secured at its rear end by the hold-down device 109 against lifting off from the top of the base plate 103. Furthermore, a leg spring 108e is arranged on the pivot pin 104, which urges the support plate 108 into its central position. The support plate 108 carries at its front end a stop 108a for the heel of the ski shoe 110, the ski shoe tip being held down by a toe, not shown in this figure, similar to the configuration according to FIG. 1. Furthermore, an elongated hole 114 is recessed in the support plate 108, which extends centrally to the longitudinal axis of the support plate 108 and serves to receive a thrust spring 121 to be described in more detail.

The heel holder 102 is of a known type. It has a bearing block 116 with a base 116a and a sole holder 106 which is pivotably mounted in the bearing block 116 about an axis 106b and can be actuated by means of a step spur 107. A suspension fork 145 is also mounted on this axis 106b and receives a detent spring 125 designed as a compression spring. The bearing block 116 has a front wall 116c, against which the end of a locking lever 148, which is mounted in the sole holder 106 on an axis 148a, bears. This locking lever 148 is acted upon on its rear side by a pressure piece 149 which is guided in slots 145b of the spring fork 145 and is acted on by the detent spring 125. Furthermore, the heel holder 102 is provided with a release lever 191 which can be pivoted about the same axis 148a as the locking lever 148. The bias of the detent spring 125 can be changed by means of an adjusting screw 146 in a known and therefore not further described manner. The release lever 191 is articulated to the suspension fork 145 via a bolt 191a, which is guided on the one hand in circular elongated holes 116d of the two side walls of the bearing block 116 and on the other hand in an elongated hole 145c of the suspension fork 145. As a result, the skier can arbitrarily get out of the binding by overcoming the force of the detent spring 125.

The bearing block 116 is guided in a longitudinally displaceable manner by means of its base 116a on the support plate 108, the base 116a enclosing the latter on its two sides. The bearing block 116 also carries, preferably at its base 116a, a downwardly projecting shoulder 120 which engages in the elongated hole 114 and is loaded in a known manner by the thrust spring 121 which is designed as a compression spring and which push the bearing block 116 against the pivot pin 104 seeks. As a result, the ski boot 110 is continuously pressed against the stop 108. A control element 156 is fastened to the suspension fork 145, in the present exemplary embodiment being formed in one piece with the suspension fork 145. As shown in FIG. 3, the control element 156 has a control cam 156a with a convex course and cooperates with a roller 155 which is arranged in bearings 103b of the base plate 103 by means of its axis running in the longitudinal direction of the ski.

In the event of a frontal fall, the left end of the locking lever 148 in FIG. 4 slides along the front wall 116c of the bearing block 116 until the ski boot 110 is released. In order to enable the skier to re-enter with the ski boot 110, the latching lever 148 is held in the open position of the heel holder 102 by a latch.

If the skier falls, the support plate 108 pivots about the pivot pin 104, a relative movement taking place between the roller 155 and the control cam of the control element 156, since the roller 155 is immovably mounted in the base plate 103 in the transverse direction. As a result of this relative movement between roller 155 and control element 156, the latter pushes the spring fork 145 upward, so that the pressure piece 149 is lifted out of the groove which is provided on the rear side of the locking lever 148 mounted on the axle 148a. The locking lever 148 is released and can lift off the front wall 116c of the bearing block 116 without force. As a result, however, the sole holder 106 can also pivot about its axis 106b into its open position, which results in the ski boot 110 being released. Subsequently, the support plate 108 is pivoted back into its starting position by means of the leg spring 108e.

The embodiment of a ski binding shown in FIGS. 5 to 7 differs from the previous ones primarily in that the heel holder 202 is arranged on a support plate 208 which is flat and has no stop for the heel of the ski boot 210. For this reason, a heel holder 202 is assigned to the heel holder 202 on the ski 201 and is equipped with a support plate 251 for the tip of the ski boot 210. The position of the support plate 251 is changed relative to the front jaw 205 about a vertical axis 252. Furthermore, the support plate 208 has upwardly projecting drivers 212 on both sides and in the heel area of the ski shoe 210, which counter the ski shoe 210 onto the support plate 208 unwanted lateral pivoting ensure a secure hold. As a comparison of FIGS. 6 and 7 shows, the support plate 251 pivots with the sole of the ski boot 210 in the event of a fall, so that no relative be between the sole thereof and the support plate 251 movement and therefore no friction occurs. The heel holder 202 can be designed in accordance with the embodiment already discussed. The control mechanism for a horizontal release corresponds to that of FIG. 3, so that no further details will be given.

FIG. 6 shows the position of the binding parts in the driving position and FIG. 7 shows that when the horizontal release process has been initiated, only the support plate 208, the base plate 203 on the ski 201 and the control mechanism being shown in the area of the heel holder.

FIG. 5a illustrates a variant of FIG. 5 in that the support plate 251 'associated with the front jaw 205' carries the drivers 212 'required for the lateral holding of the ski boot 210'. The drivers 212 provided on the support plate 208 in the heel area of the heel holder 202 in FIG. 5 are then correspondingly omitted. Since the design and mode of operation of the heel holder associated with FIG. 5a otherwise corresponds to that according to FIG. 5, it is not necessary to describe and describe this.

8 shows a binding in which the sole plate 308 carrying the ski boot and the heel holder 302 can be pivoted about the pivot pin 304 of the base plate 303 and is held down at both its front and at its rear end by hold-down devices 309a and 309b Top of the base plate 303 or the ski 301 is secured. The structure and mode of operation of this heel holder 302 correspond to the essence of the embodiment according to FIG. 3. For this reason, reference is made to the preceding description in connection with the parts list of both figures.

FIGS. 9 and 10 show a further embodiment of a heel holder 402 on a ski 401. This has a base plate 403 on which a pivot 404 is fastened. A support plate 408 is pivotally mounted on the latter. At its rear end, the base plate 403 carries a flange which is gripped by the end of the support plate 408. At its front end, an angle lever 465 is articulated to the support plate 408 by means of a transverse axis 465a, the upward-pointing lever arm of which forms the stop 408a for the front of the heel of the ski boot 410. The angle lever 465 can be acted upon by a light spring 465c towards its opening direction limited by a stop 465d. In Fig. 10 it can be seen that the angle lever 465 is approximately U-shaped in plan view. The two horizontal legs of the U-s encompass a tapered area of the support plate 408 and have elevations 465b which, by improving the rolling movement, make it easier to get in with the ski boot 410. On the support plate 408, a bearing block 416 is slidably mounted to a limited extent in its longitudinal direction. The bearing block 416 carries at its base 416a a front wall 416c for supporting the latching lever 448 mounted on the axle 448a, and a projection 466 projecting downwards into which a tension spring 467 is suspended, the other end of which is anchored to a projection 403c of the base plate 403 . The heel holder 402 is constantly pulled against the ski boot 410 by the tension spring 467.

In this embodiment too, the sole holder 406 and the suspension fork 445 are pivotably mounted about the common axis 406b. The spring fork 445 is provided with downwardly directed lugs 445a on which a control element 456 is pivotally mounted. A roller 455 is mounted in the base plate 403, the axis of which runs radially to the pivot 404 and to which the control element 456 is assigned.

When the skier falls, the support plate 408 is first deflected from its central position against the force of the tension spring 467 by a predetermined angle. The roller 455 mounted in the base plate 403 rotates the control element 456 articulated on the spring fork 445 until the pressure piece 449 guided in the longitudinal direction of the spring fork 445 comes out of the groove provided on the rear side of the locking lever 448. is highlighted. The sole holder 406 can then pivot about its axis 406b into its open position. The further procedure corresponds to that already described.

Various changes to the illustrated exemplary embodiments are possible without leaving the scope of the invention. For example, the control according to FIGS. 3 to 8, which causes the heel holder to open when triggered horizontally, could also be used in conjunction with an embodiment according to FIG. 9. It would also be conceivable to use the control of the heel holder according to FIG. 9 for the heel holder according to FIG. 3, 5 or 8.

Another possibility is to realize the storage of the heel of the ski boot on an angle lever according to FIGS. 9 and 10 also in the embodiments according to FIGS. 1, 3, 5 or 8.

In all embodiments, there is the further advantage that this binding system releases the ski boot even in the event of a reverse turn.

Claims (10)

1. A safety ski binding, particularly a heel clamp (2, 102) comprising a base plate (3, 103) adapted to be secured on the top surface of the ski and carrying a vertical pivot pin (4,104), said binding, particularly said heel clamp (2, 102), being provided with a sole clamp (6, 106) mounted for pivoting upwards against the force of a first spring (125) acting on a releasable detent mechanism, and with a bearing plate (8, 108) on which the sole of a ski boot (10, 110) inserted into the binding is supported, at least with its heel portion, in any position of said bearing plate (8, 108), said bearing plate (8, 108) being urged into its center position by a further spring (121), characterized in that said pivot pin (4) is located between the front jaws (5) and said heel clamp (2) of the ski binding as viewed in the longitudinal direction of the ski, said bearing plate (8, 108) being pivotally mounted on said pivot pin (4,104), in that a roller (155) associated to a control cam surface (156a) is mounted on an axis extending substantially parallel to said bearing plate (8,108), said roller causing said heel clamp (102) to open by travelling along said control cam surface (156a) in response to lateral pivoting of said bearing plate (108), in that the axis of said roller (155) is mounted in said base plate (103) and extends in the longitudinal direction of said bearing plate (108), and in that said control cam surface (156a) extends transversely of the longitudinal direction of the ski and is formed on a control element provided on a component of the releasable detent mechanism of said heel clamp (2).

2. A ski binding according to claim 1, characterized in that the front end of said bearing plate (8) carries an abutment stop (8a) extending transversely of its longitudinal direction for supporting thereon the front end of the heel portion (10a) of said ski boot (10), said abutment stop (8a) being preferably spaced from said pivot pin (4) by a constant distance as viewed in the longitudinal direction of said bearing plate (8) (fig. 1).

3. A ski binding according to claim 1, wherein said bearing plate is formed as a sole plate (8') carrying at its front end an abutment stop (8'a) extending transversely of its longitudinal direction for engagement with a groove (10'c) formed in the ski boot sole transversely of the longitudinal vertical center plane of said ski boot (10'), characterized in that said abutment stop (8'a) is directed upwards and in the direction towards said heel clamp (2'), and that the ski boot (10') inserted into the ski binding is supported on said abutment stop (8'a) with the rear boundary wall of its groove (10'c) (fig. 2).

4. A ski binding according to claims 1 and 2 or 1 and 3, wherein said heel clamp (102,302) includes a bearing block (116, 316) in which said sole clamp (106, 306) and a spring fork (145, 345) housing said first spring (125, 325) are mounted on a shaft (106b, 306b), said spring (125, 325) being formed as a compression spring, said sole clamp (106, 306) including a further shaft (148a, 348a) supporting a detent lever (148, 348) the detent nose of which is releasably engaged with the front wall (116c, 316c) of said bearing block (116,316) in the riding position of said heel clamp (102, 302), said detent lever (148, 348) being biased by said compression spring (125, 325) through a thrust member (149, 349) engaging a groove in the rear side of said detent lever (148, 348) in the riding position, said groove and said thrust member (149, 349) cooperating to form said releasable detent mechanism for said sole clamp (106, 306), characterized in that said base plate (103, 303) is provided with a bearing (103b, 303b) for mounting the axle of said roller (155, 355) associated to said control element (156, 356) secured to said spring fork (145, 345) (figs. 3, 4 and 8).

5. A ski binding according to claim 1 provided with a front jaw assembly (205, 205') and a heel clamp (202), said front jaw assembly (205, 205') being likewise provided with a bearing plate (251, 251') mounted for pivoting about a vertical axle pin (252, 252') relative to said front jaw assembly (205, 205'), said heel clamp (202) including a bearing block (216) in which said sole clamp (206) and a spring fork (245) housing said first spring (225) are mounted in a shaft (206b), said spring (225) being formed as a compression spring, said sole clamp (206) including a further shaft (248a) mounting a detent lever (248) the detent nose of which is releasably engaged with the front wall (216c) of said bearing block (216) in the riding position of said heel clamp (202), said detent lever (248) being biased by said compression spring (225) through a thrust member (249) received in a groove in the rear side of said detent lever (248) in the riding position, said groove and thrust member (249) cooperating to form said releasable detent mechanism for said sole clamp (206), characterized in that said base plate (203) is provided with a bearing (203b) for the axle of said roller (255), in that said control element (256) is secured to, and preferably formed integrally with, said spring fork (245) of said heel clamp (202), and in that said bearing plate (208 or 251') is provided on both sides thereof with upwards projecting abutments (212 or 212') engaging the heel or sole portion, respectively, of said ski boot (210 or 210') for securing said ski boot (210 or 210') against unintentional lateral pivoting on said bearing plate (208 or 251') (fig. 5 or 5a, respectively).

6. A ski binding according to claim 4 or 5, characterized in that the lower boundary wall of said control element (156) facing towards said roller (155) and formed as said control cam surface (156a) is of convex configuration as viewed in the plane extending transversely of the longitudinal axis of said bearing plate (108) (fig. 4).

7. A ski binding according to claim 1, wherein said heel clamp (402) includes a bearing block (416) having a base portion (416a) formed as a slide member, and in which a sole clamp (406) and a spring fork (445) are mounted on a shaft (406b), said sole clamp (406) including a further shaft (448a) mounting a detent lever (448) the detent nose of which is releasably engaged with the front wall (416c) of said bearing block (416) in the riding position of said heel clamp (402), said detent lever (448) being biased by a compression spring (425) disposed in said spring fork (445) through a thrust member (449), characterized in that said control element (456) is pivotally mounted on downwards directed projections (445a) of said spring fork (445), and in that said bearing block (416) is longitudinally displaceable on said bearing plate (408) and biased in the direction towards said ski boot (410) by a tension spring (467) anchored at one end on a downwards directed projection (466) of said bearing block (416), and at the other end, on a projection (403c) of said base plate (403) (fig. 9).

8. A ski binding according to claim 1 or 2, wherein said heel clamp (402) includes a bearing block (416) having a base portion (416a) formed as a slide member and in which a sole clamp (406) and a spring fork (445) are mounted on a shaft (406b), said sole clamp (406) including a further shaft (448a) mounting a detent lever (448) the detent nose of which is releasably engaged with the front wall (416c) of said bearing block (416) in the riding position of said heel clamp (402), said detent lever (448) being biased by a compression spring disposed in said spring fork (445) through a thrust member (449) characterized in that said control element (468) is pivotally mounted on downwards directed projections (445a) of said spring fork (445), and in that said bearing block (416) is longitudinally displaceable on said bearing plate (408) and biased in the direction towards said ski boot (410) by a tension spring (467) engaged on the one side with a downwards directed projection (466) of said bearing block (416), and on the other side, with a projection (403c) of said base plate (403) (fig. 9).

9. A ski binding according to claim 8, characterized in that said base plate (303) at its rear end carries a flange engaged from below by the end of said bearing plate (308).

10. A ski binding according to claim 2, 4 or 8, characterized in that a crank lever (465) is mounted on a transverse axis (465a) on the front end of said bearing plate (408), the upwards extending arm of said crank lever (465) acting as said abutment stop (408a) for the heel portion of the ski boot (410) inserted into the ski binding, the other arm of said crank lever (465) being horizontal in the riding position and preferably of U-shaped configuration when viewed from above, the upper sides of the two legs of the U-shaped arm being formed with raised portions (465b) on which the heel portion of said ski boot (410) is supported, and in that said crank lever (465) is optionally biased in its release direction by a weak spring (465c) (figs. 9 and 10).

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