EP1003595A1

EP1003595A1 - Safety binding for a snowboard

Info

Publication number: EP1003595A1
Application number: EP98934733A
Authority: EP
Inventors: Roger Marcel Humbel
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-02
Filing date: 1998-08-03
Publication date: 2000-05-31
Also published as: AU8429498A; JP2001511413A; US6428032B1; WO1999006127A1

Abstract

The invention relates to a new safety binding (1) for a snowboard (3) comprising a first part (4) secured to the snowboard and a second part connected to the ski boot or snowboard boot (2). Both parts are joined to each other by means of a locking mechanism which can be released using force. The locking mechanism consists of at least two pressure springs which are arranged substantially parallel to each other and substantially parallel to the snowboard. Each spring has a bolt (21,22,28,29) which engages with a locking member (49;48).

Description

Safety binding for a snowboard

The invention relates to a safety binding for a snowboard according to the preamble of patent claim 1.

Safety bindings are generally known for skis and in various designs. With snowboards, however, it is still very common for a normal binding to be provided for the shoes (hard shell shoes or soft shoes, so-called “soft boots”), which cannot or hardly meet the requirements for a safety binding. They are a few Safety bindings available on the market which can reasonably meet the requirements for snowboards. Among other things, this is a safety binding of the "Meyer" brand, which consists of a spherical cap-shaped disc mounted on the snowboard with snap-in recesses and a snap-on thereon by rotation Carrying plate for the .Snowboard shoe exists. This is clamped onto the support plate with the usual buckles. The support plate has a central circular opening so that it can be centered on the round disc. Furthermore, the support plate has two rounded bolts in the longitudinal direction on diametrically opposite sides of the opening, which are prestressed inwards by means of compression springs and can thus latch into the snap-in recesses of the disk. The clamping force of the individual compression springs can be adjusted using an adjusting screw. For this purpose, an adjustment scale is provided on the support plate. As a rule, the two support plates are attached to the cambered discs by turning and only then are the snowboard boots clamped in with the buckles. If the snowboarder is subjected to an excessive load on the snowboard, which can result from a rotation of the foot around the longitudinal direction of the foot, around the longitudinal direction of the lower leg or through rotation of the ankle or through a combination of these rotations, the support plate is now removed from the disc jump and can thus prevent foot or leg injuries. This known safety binding actually only allows the triggering torque to be adjusted around the longitudinal direction of the lower leg, so that the other directions of rotation of the foot trigger the safety binding in a predetermined relationship to this setting. This means that these tripping torques themselves cannot be set. This can lead to incorrect triggering of the safety binding, which will soon lead experienced snowboarders to do without such a safety binding and only use the usual buckles. The sports injuries caused by extreme driving on mogul slopes or in the more impassable terrain with snowboards will increase, which - apart from the personal inconvenience - is extremely undesirable for the economy.

The present invention is based on the object of creating a safety binding for snowboards which completely eliminates false triggering and thus brings about a substantially greater acceptance by snowboarders.

This object is achieved by a security binding with the features of patent claim 1.

The safety binding according to the invention is characterized in that the locking mechanism between the first part fastened to the snowboard and the second part fastened to the ski or snowboard shoe consists of at least two compression springs arranged essentially parallel to one another and essentially parallel to the snowboard, each at their ends have a pin which engage in a latching element. This triggers the triggering torque when rotating around the lower leg longitudinal direction by the two compression springs, which has a decisive effect on the tripping in the other two directions of rotation. Thus, the possibilities of false triggering by turning the foot, which consists of a combination of the different turns, are largely excluded. In an advantageous development of the safety binding according to the invention, the tensioning springs can be adjusted. This allows individual settings to be made. The setting according to claim 3 with a counter plate, which has a rotatable spacer, in particular a screw, has proven particularly useful. The latching elements are advantageously trough-shaped to allow slight displacements or rotations of the first part to the second part without triggering. It is particularly advantageous if the latching elements are designed as a groove with a recess recessed for each bolt. As a result, the bolts are guided even better when they are engaged. In practice, it has proven particularly useful that the shape of the ramps of the groove and / or the troughs can be adjusted by means of height-adjustable inserts, in particular screws. The design according to claim 7, wherein the compression springs are provided on the first part designed as a fastening plate and the latching elements on the second part designed as a shoe plate, has the great advantage that a great stability of the safety binding is achieved. The compression springs are also excellently protected against snow, dirt and ice in this way. Especially for more demanding snowboard rides, it has proven itself if the fastening plate has an angle of approximately 3 to 10 °, in particular approximately 5 °, with respect to its longitudinal direction and / or with respect to an axis arranged perpendicular to the longitudinal direction an angle of approximately 3 to 10 °, in particular approximately 5 °, can be set at an angle to the level of the snowboard. These settings, which are referred to as "canting" and "heel" under snowboarders, are primarily made for the safety binding of the front foot and can be omitted for the rear foot. These angles are advantageously adjustable according to claim 9 by means of two adjusting screws and rubber-elastic intermediate rings. Furthermore, according to claim 10, it has been particularly distinguished if a stopper is provided on the fastening plate, which can be automatically moved into a stop position when triggered. Further advantages of the invention follow from the dependent patent claims and from the following description, in which the invention is explained in more detail with reference to an embodiment shown in the schematic drawings. It shows:

1 is a perspective view of a two-part safety binding with a snowboard shoe attached to it,

2 is a perspective view of the first part fastened to the snowboard,

Fig. 3 shows the second, connectable to the snowboard shoe in a perspective view.

4 shows a schematic top view in the direction of arrow A in FIG. 2,

Fig. 5 is a schematic side view of the frame part of the mounting plate in the direction of arrow B in Figure 2, and

6 shows a schematic side view of the clamping jaw of the shoe plate in the direction of arrow C in FIG. 3.

In the figures, the same reference numerals have been used for the same elements, and first-time explanations apply to all figures, unless expressly stated otherwise.

1 shows an overall illustration of a safety binding 1 with a snowboard shoe 2, which essentially consists of a first part 4 mounted on the schematically indicated snowboard 3 and a second part 5 strapped onto the snowboard shoe 2. The snowboarder's foot (not shown here) can now be rotated around the longitudinal direction of the foot (X direction), rotated around the ankle (Y direction) or one Make a rotation around the length of the tibia (Z direction). This generates a torque in the X direction M _x , a torque in the Y direction M _y or a torque in the Z direction M _z . With these torques about the three mutually perpendicular axes, each rotation of the foot can be broken down into its components. From the biomechanical point of view, all foot rotations can be clearly assigned.

The first part 4, which is referred to as the fastening plate, can be seen more clearly from FIG. The shim 7 is via a through screw 8 with a 90 ° tiltable rotary folding lever 9 and a nut 10 with corrugated side plates 11 in a U-shaped rail 12 with inwardly projecting L-profiles 13, which are also on the inside can be corrugated, slidable and fixable in a certain position. If the rail 12 is made of a light metal such as aluminum, the corrugation of the L-profiles 13 can be dispensed with. The one-piece washer 7 has on its outer edge 70 two diametrically opposite cams 71 a and 71 b, which serve as pivot bearings for the mounting plate 4 (see FIG. 5). The mounting plate 4 has a central circular opening 14 with corresponding corrugation, in which the adjusting disc 7 is held in a certain position. The correct position and angular position of the fastening plate 4 on the snowboard 3 can thus be set in a known manner, which is why it is not discussed further here. On the mounting plate 4, a frame part 15 is also fastened by means of screw nuts 16, which are screwed onto a threaded pin 16 ', and a plurality of rubber-elastic spacer rings 17, which contains two compression springs 18 and 19 arranged parallel to one another. The pressure springs 18 and 19 press with the right-hand ends seen in the figure against a right-hand pressure plate 20 which carries two rounded bolts 21 and 22 aligned in the axial direction of the pressure springs 18 and 19, respectively. At the left ends of the two compression springs 18 and 19, a left pressure plate 23 is provided which has a screw thread into which an adjusting screw 26 is screwed. A pressure plate 27 is located opposite the pressure plate 23 two rounded bolts 28 and 29 also provided in the axial direction of the compression springs 18 and 19, respectively. The counter plate 27 is pressed against the left inner wall of the frame part 15 by the compression springs 18 and 19 with a predetermined force. For this purpose, a stepped bore is provided in the counterplate 27, in which the stepped screw head 30 of the adjusting screw 26 is supported. By adjusting the set screw 26, the pressure on the four bolts 21, 22, 28 and 29 can thus be set to a specific value. The right or front part of the frame part 15 also has two fork-shaped parallel tines 32, which serve to guide the cleat 5 when entering (see below). On the left in FIG. 2, a so-called stopper 33 is provided on the fastening plate 4, which consists of an omega-shaped wire bracket 34 with bent ends 35 and 36, which pass through correspondingly angled recesses 37 in the fastening plate 4. The free end regions 38 of the wire bow 34 are arranged at an acute angle to the oval-shaped part of the omega, the end regions 38 being located in a plane which is perpendicular to the plane of the oval-shaped part. The wire bracket 34 thus urges the stopper 33 into the triggering position shown through these spring-elastic end regions 38. A pressure plate 90 with a roller 91 and a U-shaped bracket 92 is provided on the wire bracket 34. The compression springs 18 and 19 are covered from above by a cover 40 which is clamped into corresponding grooves (not shown here) in the frame part 15 by means of clamping cams 41. The frame part 15 is thus completely closed off, at least from above and from the side, so that snow, ice and dirt cannot reach the compression springs. Furthermore, the cover 40 has in its longitudinal direction a downwardly projecting rib 42, which extends between the compression springs 18 and 19 and engages in corresponding grooves 43 in the right pressure plate 20, in the left pressure plate 23 and in the counter plate 27.

The cover 40 can also be rotated through 180 °, and thus placed over the compression springs 18 and 19. Since the rib 42 is formed asymmetrically to the longitudinal direction and on both sides somewhat shorter than the length of the cover 40 and a corresponding groove 43 ′ is provided only on the pressure plate 23, the rib 42 serves as a stop for the right pressure plate 20 and the counter plate 27, so that these can no longer be moved inwards, ie that the bolts 21, 22 , 28 and 29 are fixed in the troughs 48 of the cleat 5 (see below). This prevents safety binding 1 from being triggered, which is desirable as a possibility for particularly experienced snowboarders in certain situations.

The second part 5, referred to as the shoe plate, is shown in perspective in FIG. It consists of two counterparts 45 and 46, which are held bridging by a connecting plate 47. The right-hand counterpart 45 has a fixedly arranged clamping jaw 80, the left-hand counterpart 46 has a clamping jaw 81 which is rotatable about its longitudinal direction. The right-hand counterpart 45 also has outer contours such that it fits between the fork-shaped prongs 32 of the frame part 15. The length of the connection plate 47 corresponds approximately to that of the frame part 15, ie it is somewhat longer than this and has the same width. The connecting plate 47 thus completely covers the frame part 15. The two clamping jaws 80 and 81 have an arcuate groove 49 provided with troughs 48 on the side opposite the bolts 21 and 22 or 28 and 19 (only visible on the clamping jaw 80). The bolts 21 and 22 engage in the corresponding troughs 48 when boarding (see below). In order to be able to adjust the triggering torque in the vertical direction, a screw 50 is provided in the groove 49 in addition to the troughs 48 against the inside, which are screwed into a corresponding screw thread (not shown here). Of the screws 50, only the end protruding into the groove 49 can be seen. The force required to detach the shoe plate 5 from the fastening plate 4 in the vertical direction can thus be individually matched to inward and outward foot turns performed by the snowboarder. In the same way, the bolts 28 and 29 engage in the corresponding troughs (not shown further here) of the clamping jaw 81. On the counterparts 45 and 46, a tensioning bracket 51 and 52 are provided, with which the ski or snowboard shoe is strapped on. Laterally are on the counterparts 45 and 46 at an even distance from each other adjustment holes 54 are provided in order to be able to adjust the tensioning brackets 51 and 52 according to the shoe size. As an entry or guide aid, the underside of the connecting plate 47 is provided with a bead 56 which is the same as the cover 40 of the fastening plate 4. Furthermore, the counterparts 45 and 46 each have a sole 58 and 59 on their underside, which consist of a hard plastic rubber with a corresponding profile. This allows the snowboarder to walk with the cleats 5 strapped to the ski or snowboard boots. It should also be noted that the shoe plate 5 has at most the same dimensions as the ski or snowboard shoe.

In Figure 4, the mounting plate 4 is shown in the top view in the direction of arrow A of Figure 2 (without the cover 40). This shows in particular the design of the wire bracket 34 with the two angled end regions 38. The tines 32 are stepped and fastened to the frame part 15 by means of screws (not shown here). The stepped design of the tines 32 makes it possible to use both hard-shell shoes with a smaller width and wider soft snowboard shoes (so-called “soft boots”). FIG. 5 shows a schematic side view of the frame part 15 in the direction of the arrow B in FIG 2. It can be seen from this that the frame part 15 has a fork 90 on the left-hand side seen in FIG. 2, which is rotatably and vertically adjustable on the left cam 71 b. FIG. 6 shows a schematic side view of the clamping jaw 80 in 3 in the direction of arrow C. The opposite side wall of the frame part 15 can be rotated by means of an enclosed recess or bore (not shown), but cannot be adjusted in height on the opposite, right cam 71b, so that the frame part 15 is at an angle is angled from 3 to 10 °, preferably 5 ° (only affects the safety binding 1 for the front F uss).

The rotatable clamping jaw 81 can be brought into two latching positions via a link 85 (see FIG. 3): In the first latching position the is The jaw 81 is arranged in the same way as the jaw 80, ie the shoe plate 5 can be snapped into place. By means of a cable 86, the clamping jaw can be tilted down into the second latching position, so that the shoe plate 5 is no longer held by the bolts 28 and 29 on the fastening plate 4 - the so-called free release.

The following settings can be made with the safety binding 1 for snowboards described above:

- A presetting of the mounting plate 4, which can be tilted slightly by means of the rubber-elastic spacer rings 17 and the screw nuts 16 in a plane around the longitudinal direction by an angle of approximately 3 to 10 °, preferably 5 ° (so-called “canting”).

- A presetting of the mounting plate 4, which is also angled by means of the spacer rings 17 and the screw nuts 16 in a plane about an axis perpendicular to the longitudinal direction by an angle of 3 to 10 °, preferably 5 ° (so-called "heel") Adjustment of "canting" and "heel" allows the optimum level for the sole of the foot to be set, so that no pre-tension is exerted by the foot on the mounting plate 4. This applies above all to the rear foot, the front foot being essentially flat on the Snowboard stands;

- Triggering by rotation about the X axis, i.e. by a torque Mx, by adjusting the pressure of the compression springs 18 and 19 by means of the adjusting screw 26;

triggering by rotation about the Y-axis, ie by a torque M _γ , by adjusting the pressure of the compression springs 18 and 19 by means of the adjusting screw 26; and - Triggering by rotation about the Z axis, ie by a torque M ₂ , by means of one of the adjusting screws 50 in the groove 49 of the clamping jaws 45 or 46.

This enables the triggering torques to be set for the individual snowboarder, so that false triggers can practically be ruled out.

The snowboard boot 2 is now connected to the snowboard 3 via the safety binding 1 as follows:

First, the two cleats 5 are clamped under the snowboard boots 2 with the clamps 51 and 52, and then the cleats 5 are tilted forward with the two recesses 48 of the front jaw 45 latched in via the rounded bolts 21 and 22. The right counterpart 45 is brought between the fork-shaped tines 32 on the frame part 15, which thus serves as an entry aid. The left or rear counterpart 46 is then latched with the heel over the rounded bolts 28 and 29. These bolts 28 and 29 are pressed inwards by the special design of the groove 49 before they jump into the troughs 48. This type of entry is generally known for ski bindings under “step-in”. In contrast to the “Meyer” type of safety binding known from the introduction, the foot therefore does not have to be rotated, but the shoe plate 5 can be snapped onto the fastening plate 4 with the heel to be brought. The bead 42 in the cover 40 of the fastening plate 4 and the uniform bead 56 of the shoe plate 5 also serve as further entry aid. When boarding, the stopper 33 is simultaneously brought into the driving position, i.e. the pressure plate 90 with the roller 91 is pressed down with the heels, the pressure plate 90 being “moved” parallel downward by the U-shaped bracket 92.

FIG. 4 also shows a variant of the omega-shaped wire bracket 34 on the left-hand side, in that the end region 38 'is angled more to the oval-shaped part of the wire bracket 34 is provided. The recess 37 'in the mounting plate 4 is arranged accordingly. As a result, a greater spring force is exerted on the stopper 33, so that it trips faster.

Furthermore, it is understood by the person skilled in the art that the fastening plate 4 can also have the clamping jaws 45 and 46 as latching elements, and the shoe plate 5 the compression springs 18 and 19, in this case two compression springs in the left and right counterpart 45 and 46, respectively are to be arranged. Another design, the connecting plate 47 being higher than the two counterparts 45 and 46, would be less suitable from a practical point of view.

Of course, the shoe plate 5 can also be fastened directly to the snowboard shoe 2 with screws instead of clamping brackets or cast in the sole of the snowboard shoe 2.

In order to be able to easily determine the triggering torques, the fastening plate 4 is removed from the adjusting disk 7 with the rotary folding lever 9 and a threaded rod (not shown here) with a ball fastened thereon is screwed into the screw nut 10. An adapter similar to the frame part 15 with fixed bolts such as bolts 21, 22, 28 and 29 and a pan is then latched into the shoe plate 5. The snowboarder now places the snowboard boots 2 with the pan of the adapter on the ball, so that rotation is more or less possible in all directions. A longer lever arm is also provided on the adapter, to which a spring balance can be attached. The maximum isometric force of the calf muscles for triggering the safety binding can thus be measured directly at any sales or service point and used to set the safety binding.

The triggering moments of the two safety bindings 1 can thus be set individually for each foot, so that simultaneous triggering is always guaranteed without a mechanical connection between the two bindings.

Claims

claims

1. Safety binding (1) for a snowboard (3) with a first part (4) fastened to the snowboard and a second part (5) connected to the ski or snowboard boot, which can be triggered by force

Locking mechanism are connected to one another, characterized in that the locking mechanism consists of at least two compression springs (18, 19) arranged essentially parallel to one another and essentially parallel to the snowboard (3), each of which has a bolt (21, 22, 28, 29) which fit into a latching element (49;

48) intervene.

2. Safety binding according to claim 1, characterized in that the compression springs (18, 19) are adjustable in their clamping force.

3. Safety binding according to claim 2, characterized in that the compression springs (18, 19) of a counter plate (27) by means of a rotatable spacer, in particular a screw (26), are adjustable.

4. Safety binding according to one of claims 1 to 3, characterized in that the latching elements (49) are trough-shaped.

5. Safety binding according to claim 4, characterized in that the latching elements are designed as a groove (49) with a recess (48) recessed for each bolt.

6. Safety binding according to claim 5, characterized in that the ramps of the groove (49) and / or the troughs (48) can be adjusted in shape by means of height-adjustable inserts, in particular screws (50).

7. Safety binding according to one of claims 1 to 6, characterized in that the compression springs (18, 19) on the first part designed as a fastening plate (4) and the latching elements (49; 48) on the second part designed as a shoe plate (5) are provided .

8. Safety binding according to claim 7, characterized in that the fastening plate (4) with respect to its longitudinal direction by an angle of approximately 3 to 10 °, in particular approximately 5 °, and / or with respect to an axis arranged perpendicular to the longitudinal direction by an angle of approximately 3 to 10 °, in particular approximately 5 °, can be set at an angle to the level of the snowboard (3).

9. Safety binding according to claim 8, characterized in that the angle or angles are adjustable by means of two adjusting screws (16 ') and rubber-elastic intermediate rings (17).

10. Safety binding according to one of claims 1 to 9, characterized in that a stopper (33) is provided on the mounting plate (4), which can be moved automatically into a stop position when triggered.