EP2953694A1 - Secure attachment of a shoe on a ski - Google Patents

Secure attachment of a shoe on a ski

Info

Publication number
EP2953694A1
EP2953694A1 EP13818762.0A EP13818762A EP2953694A1 EP 2953694 A1 EP2953694 A1 EP 2953694A1 EP 13818762 A EP13818762 A EP 13818762A EP 2953694 A1 EP2953694 A1 EP 2953694A1
Authority
EP
European Patent Office
Prior art keywords
ski
control circuit
parameter
progression
skis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13818762.0A
Other languages
German (de)
French (fr)
Other versions
EP2953694B1 (en
Inventor
Fabrice Devaux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brison SA
Original Assignee
Brison SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brison SA filed Critical Brison SA
Publication of EP2953694A1 publication Critical patent/EP2953694A1/en
Application granted granted Critical
Publication of EP2953694B1 publication Critical patent/EP2953694B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/0802—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings other than mechanically controlled, e.g. electric, electronic, hydraulic, pneumatic, magnetic, pyrotechnic devices; Remote control
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/081—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with swivel sole-plate
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/082—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with swivel heel-plate
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/084—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with heel hold-downs, e.g. swingable
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/085—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with sole hold-downs, e.g. swingable
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C9/00—Ski bindings
    • A63C9/08—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings
    • A63C9/088—Ski bindings yieldable or self-releasing in the event of an accident, i.e. safety bindings with electronically controlled locking devices
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/18—Measuring a physical parameter, e.g. speed, distance
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/24—Processing or storing data, e.g. with electronic chip

Definitions

  • the invention relates to a device for securely fastening a boot on a ski.
  • the bindings of shoes allow a reliable and removable fastening of a shoe on a ski.
  • the separation between the boot and the ski is performed either voluntarily by the user by a mechanical means, or involuntarily in particular when certain forces greater than a predefined threshold are applied to at least one of the elements of the binding, for example in case of skier falling.
  • the predefined threshold of the forces beyond which the shoe disengages from the ski (or loosens) is generally adjustable according to the weight of the individual, his skill level, his physical condition, etc.
  • non-triggering is the main cause of knee sprains.
  • the most common conventional fasteners include a heel and a front stop, the heel pressing on the heel of the shoe, thus pressing the shoe against the front stop.
  • the jaws of the heel and / or of the front stop automatically open or tilt under the effect of forces greater than a predefined threshold in order to release the shoe. It is therefore a purely mechanical means implemented for example with the aid of simple springs.
  • the patent application FR 2 874 833 describes in particular a ski boot binding which improves the safety of the bindings by proposing a heel piece comprising a means for facilitating the rotation of the heel of the boot along a vertical axis by limiting the frictional resistance of the shoe. the sole of the shoe on the binding.
  • the binding must be properly adjusted according to parameters specific to the skier and likely to change over time (weight of the skier, level of skill, physical condition, etc.).
  • US Pat. No. 6,007,086 proposes a ski boot binding device whose purpose is to overcome these disadvantages.
  • Said device comprises in particular a system for attaching a boot to a ski using electromagnets and a processor configured to communicate with said fixing system.
  • This device makes it possible to separate the boot from the ski when forces greater than a predefined threshold are identified by the processor.
  • this device can be completed by a transmitter placed at the front of a first ski and a receiver placed in the same manner on a second ski, each of the skis comprising a transmitter / receiver assembly in communication with the processor.
  • the transmitter of a first ski sends a signal to the receiver of the second ski, the signal being in the form of a unidirectional arc.
  • the processor sends a disconnection signal to the fixing system.
  • a disconnection signal to the fixing system.
  • this device has the major disadvantage of inducing a fallout in non-risky situations or when a pile of snow between the skis momentarily interrupts the signal. Conversely, this system induces a fallout too late in risk situations.
  • a secure fastening device of a boot on a first ski comprising:
  • an attachment member of the boot on the first ski configured to facilitate the separation between the boot and the first ski on receipt of a disconnection signal
  • control circuit configured for:
  • control circuit is configured to:
  • control circuit is configured to:
  • the first and second reference directions correspond to magnetic north.
  • control circuit is configured to evaluate the speed of movement of the first ski.
  • the control circuit further comprises at least one gyroscope and / or at least one accelerometer.
  • the gyroscope can be made by any suitable means.
  • the gyroscope is made by a set of accelerometers connected to a computer continuously integrating accelerations.
  • the control circuit comprises at least one inertial unit and possibly a compass. It can be a two-dimensional compass or a three-dimensional compass. In the case of a three-dimensional compass, the compass indicates the three-dimensional vector that the terrestrial magnetic field makes with respect to the control circuit.
  • the control circuit of each ski comprises a sensor and a calculation circuit configured to calculate the parameter or parameters.
  • the device comprises a piezoelectric blade configured to integrate into the ski and in that the control circuit is configured to discriminate a sliding of the ski and another movement of the ski by controlling the electrical power generated by the piezoelectric blade.
  • the piezoelectric blade is configured to supply the entire secure fastening device.
  • the fixing member comprises a front stop, a heel and at least one pivoting plate placed between the front stop and the ski and / or between the heel and the ski.
  • the turntable is configured to be blocked in the absence of a disconnection signal.
  • the device comprises a first control circuit configured to be associated with a straight ski and a second control circuit configured to be associated with a left ski.
  • control circuit is configured to determine which ski is the right ski and which ski is the left ski relative to the shoe with which each ski is associated.
  • FIG. 1 schematically illustrates, in a top view, a embodiment of a secure fastening device.
  • the device for securely fastening a boot to a ski has an organ fastening 1 of the boot on a first ski configured to facilitate the separation between the boot and the first ski on receiving a decoupling signal.
  • the fastener 1 may be any means for attaching a boot to a ski well known to those skilled in the art.
  • the fixing device comprises a pivoting plate 3 placed between the front stop and the ski and / or between the heel and the ski to allow the shoe to remove more easily and reduce the risk of injury for the skier.
  • the fastener 1 has two different behaviors.
  • it is conventional fasteners comprising a front stop and a heel with which is associated at least one pivoting plate placed between the ski and the stop before and / or between the ski and the heel.
  • conventional fasteners any fastener as described above capable of mechanically fastening the ski boots to the ski and to separate it, especially when forces greater than a predefined threshold are applied to at least one of the elements of the binding.
  • the turntable 3 is configured to rotate, for example more or less 60 °, about a vertical axis relative to the main plane of the ski parallel to the sliding surface of said ski.
  • the turntable 3 comprises an electromechanical mechanism allowing
  • the plate 3 When the plate 3 is immobilized, it is the same for the fixation which is mounted on the plate 3. In this position, the user can ski and the fastener 1 works advantageously as in the prior art.
  • the plate 3 When the plate 3 is released, it can rotate as the attachment. This freedom of rotation allows the boot to remove more easily by escaping laterally relative to the ski to reduce the risk of injury to the skier, including knee injury.
  • the fixing device also comprises a control circuit 2 configured for:
  • the control circuit 2 is configured to lock the fastener 1 in a functional position to ski, for example to lock the turntable 3 in its non-pivoting configuration, in the absence of a disconnection signal.
  • the plate 3 is in the locked position so that in case of failure of the control circuit 2 or in the absence of the signal, the fixing device operates as in the prior art.
  • the user is always protected but less effectively, for example as in the prior art.
  • each ski comprises a fixing device comprising at least one fastener 1 and a control circuit 2.
  • the control circuit 2 of each ski comprises one or more sensors and a calculation circuit for calculating the parameter or parameters.
  • the control circuit 2 of the first ski can be connected to the fixing member 1 by a wire connection. This allows in particular to reduce the power consumption of the fixing device.
  • the control circuit 2 is able to know the spatial configuration of the two skis and to determine if the situation is a risky situation or a non-dangerous situation. In this way, compared with the devices of the prior art, the uncoupling in non-hazardous situations is reduced.
  • a first control circuit 2 is fixed on the first ski so as to determine one or more parameters specific to the first ski.
  • a second control circuit 2 is fixed on the second ski so as to determine one or more parameters specific to the second ski.
  • the use of a control circuit 2 dedicated to each ski makes it easier to calculate the various desired parameters. This, however, generally involves knowing which ski is the right ski and which other ski is the left ski. Such a determination can be made either by an initial predetermination of a right ski and a left ski as soon as the skis are designed, or by a setting of the skis as soon as they are associated with a right shoe or a left shoe.
  • the secure fastening device comprises a first calculation circuit configured to be associated with a straight ski and a second calculation circuit configured to be associated with a left ski and, according to a second embodiment , the control circuit 2 is configured to determine which ski is the right ski and which ski is the left ski relative to the shoe with which each ski is associated.
  • the second embodiment has the advantage of being able to use two identical skis.
  • control circuit 2 of each ski sends the information relating to its ski to a calculation circuit.
  • the calculation circuit is then able to calculate the parameter.
  • the information is transmitted permanently or periodically.
  • the calculation circuit is fixed on one of the skis.
  • each ski has a calculation circuit which receives information from the different sensors.
  • the calculation circuit is connected by a fii link, to the control circuit 2 of his ski, to the possible other sensors and to the attachment member 1 of his ski.
  • control circuit 2 of the first ski communicates periodically or continuously with the control circuit 2 of the second ski.
  • the communication between the two skis is preferentially a wireless communication, for example with a radio frequency link.
  • a fiancial connection by means of a thread integrated in the ski boots and in the pants of the skier.
  • the communication between the two control circuits 2 may, for example, be digitally encoded. It may be more preferably an encrypted radio wave.
  • the secure fastening device further comprises a sensor configured to determine whether the shoe of one of the two skis has loosened.
  • the sensor is configured to determine whether the shoe is fixed or not.
  • said sensor communicates the heave to the sensor or to the control circuit 2 of the other ski and the control circuit 2 of the other ski facilitates the separation of the second shoe .
  • a disconnection signal is then sent to the fixing member 1 of the other ski.
  • the sensor can be made by any means known to those skilled in the art, for example by a magnet system or any other passive system capable of detecting two different signals indicating for example "no shoe", "right shoe” or "left shoe ".
  • the fixing device also comprises a control circuit 2 configured to: determining the angular difference between the first direction of the first ski and the second direction of the second ski, and
  • the control circuit 2 is therefore configured to determine, in addition, the direction of progression of the first and second skis irrespective of the direction of progression of the skis with respect to their longitudinal axis and / or whatever their direction of progression (forward, back, left, right, etc.).
  • This can be achieved by any means well known to those skilled in the art, for example by integrating a geolocation device, at least one accelerometer and / or at least one gyroscope in each ski.
  • the secure fastening device allows a better evaluation of risk situations.
  • the gyroscope can be produced by means of a set of accelerometers connected to a computer which continuously integrates the accelerations. This functionality can be obtained for example by means of a 9-axis sensor.
  • control circuit 2 is able to know the spatial configuration of the two skis and to determine whether the situation is a risk situation or a non-dangerous situation. For example, in some configurations, the skier performs a reverse movement at low speed and stops in a configuration that is considered a risk configuration if the skier advances in the normal direction of progression. In this way, compared with the devices of the prior art, the uncoupling in non-hazardous situations is reduced.
  • control circuit 2 is configured to:
  • the first angle and the second angle are used to determine the angular difference between the two skis. This embodiment is simpler to implement and is also more robust.
  • the control circuit 2 is configured to calculate at least one parameter from the first angle, the second angle, the first direction of progression and the second direction of progression, to compare the parameter with a threshold parameter, and to transmit the signal of uncoupling according to the comparison.
  • the threshold parameter is integrated in the control circuit 2, it can be evaluated by modeling risk situations taking into account some or all the parameters measured by the fixing device.
  • the first reference direction is identical to the second reference direction.
  • one of the reference directions is determined relative to a beacon or relative to the magnetic north.
  • the first and second reference directions correspond to magnetic north.
  • This allows an easy measurement by means of an independent and easily detectable quantity by means of, for example, a simple compass or, preferably, a three-dimensional compass.
  • a simple compass or, preferably, a three-dimensional compass.
  • information on the north direction is provided.
  • the compass also indicates the three-dimensional vector that the earth's magnetic field makes with the control circuit.
  • the determination of the orientations of the skis and the determination of the progression directions of the skis can be carried out by any suitable means, for example by means of a geolocation device such as a GPS. However, it must be ensured that the capabilities of the GPS system are able to distinguish the positions of the two skis.
  • the secure fastening device is configured to be disengaged manually, for example using a remote control.
  • control circuit 2 is configured to cause the separation of the two shoes.
  • the control circuit 2 comprises an inertial unit and the compass of the control circuit 2 allows a recalibration of the inertial unit.
  • the recalibration is performed when the compass is in a normal plane or substantially normal to the radius of the earth.
  • This recalibration is particularly advantageous for a two-dimensional compass.
  • the recalibration can also be performed taking into account the gravity to determine the position of the skis in a plane normal to the ground.
  • the control circuit 2 is configured to be recalibrated periodically.
  • the inertial unit makes it possible to determine the orientation of the ski, especially when the measurement of the compass is very noisy or disturbed by metallic elements. This configuration allows for reliable measurement in a wide variety of configurations.
  • control circuit 2 can also be configured to evaluate the speed of movement of one of the skis such as the first ski or both skis.
  • the control circuit 2 may also comprise at least one accelerometer. The evaluation of the speed makes it possible to better determine the situations at risk. For example, a snowplow where the skis are particularly pushed backwards will result in a separation shoe / ski if the skier is at high speed while the uncoupling will not not at a standstill or at very low speed.
  • the control circuit 2 is configured to discriminate a ski slip on the track and another movement of the ski, for example a trip on a chairlift.
  • skis can be stationary on the chairlift but have a speed of movement that can be important.
  • the ski comprises a film of piezoelectric material or piezoelectric plate 4 preferably integrated in the ski. In this way, when the ski slides on the snow with the skier, the ski deforms and vibrates thus allowing the piezoelectric blade 4 to generate electricity.
  • the control circuit 2 is advantageously configured to control the electric power supplied by the piezoelectric blade 4 to determine if the ski slides on snow or not. In this way, the control circuit 2 is configured to discriminate a slip of the first ski and another action by controlling the electric power produced by the piezoelectric blade 4 in the first ski. When the electric power produced is below a given threshold, the control circuit 2 blocks the fixing member 1 so that the fixing device operates as in the prior art.
  • the piezoelectric blade 4 is also configured to supply at least partially the secure fastening device.
  • the piezoelectric blade 4 supplies the entire secure fastening device.
  • the piezoelectric plate 4 is coupled to super-capacitors or miniature batteries.
  • the piezoelectric blade 4 deforms and generates an electric current which supplies the electronic devices of the fixing device.
  • the fastening device operates in an energy saving mode, in particular in case of separation between the shoes and the fasteners 1 or in the event of absence or low energy production by the fasteners. piezoelectric blades 4. In this case, there is no communication between the skis.
  • control circuit 2 comprises an optionally recalibrated periodically inertial unit with a two-dimensional compass or, preferably, a three-dimensional compass.
  • each ski is continuously monitored by its control circuit 2 which detects a sudden change of direction or a sudden deceleration.
  • the control circuit 2 detects an angular acceleration and / or a linear acceleration or deceleration of the ski greater than a predefined threshold, it emits a disconnection signal to the fixing member 1 of said ski.
  • the threshold of angular acceleration and / or linear acceleration or deceleration of the ski can be set manually or established during a learning mode of the fixing device. Such an embodiment allows the skier to take off immediately as soon as a ski is stopped or deflected by an obstacle, whatever the forces applied to the fastener 1.
  • the control circuit 2 blocks the fixing member 1 so that the fixing device operates as in the prior art.
  • the fixing device comprises a pivoting plate 3, it is in the immobilized position, able to allow skiing, in the absence of communication between the two skis. The user is therefore always protected but less effectively, for example as in the prior art.
  • the control circuit 2 emits no disconnection signal except in the case of an angular acceleration and / or a linear acceleration or deceleration of the ski greater than one. predefined threshold, as previously described.
  • the control circuit 2 comprises at least one inertial unit.
  • An inertial unit is arranged on each ski and the control circuits 2 are configured to perform the calibration of the two inertial units. In this way, during the calibration step, the arrangement of the two skis is determined. When the skier moves, the two inertial units calculate gradually, the displacement and speed components which allows the control circuit 2 to determine the angular difference and direction of orientation of the two skis.
  • the use of an inertial unit is particularly advantageous because it makes it possible to calculate the angle that each ski makes with its reference direction in highly parasitic places. For example, if the reference direction is magnetic north, it is difficult to determine the first and second angles in an area having, for example, buried electric cables.
  • the inertial unit is associated with a two-dimensional compass or, preferably, with a three-dimensional compass.
  • This association makes it possible to use a less efficient inertial unit.
  • This inertial unit is calibrated initially and recalibrated periodically by means of the compass. In this way, the skier does not have to perform initial calibration procedure of the inertial unit and the calculation of the angular difference between the skis is reliable over a long period of time.
  • control circuit 2 is configured to recalibrate the inertial units periodically and to avoid the use of the compass when the ski is heavily displaced which distorts the measurement or, in the case where a two-dimensional compass is used, when the position skiing is too little parallel to the normal plane of the earth.
  • control circuit 2 consists of a set of micromechanical systems (MEMs) which reduces the power consumption of the device.
  • MEMs micromechanical systems
  • the control circuit 2 is configured to include a "learning mode". Such a mode allows a calibration of the control circuit 2 on the first or descents made by the skier.
  • the fastening device is partially activated in the direction where the control device 2 is only configured to determine the threshold parameters (for example threshold of angular acceleration and / or linear acceleration or deceleration of the ski beyond which the control circuit 2 must emit a decoupling signal) related to the specific characteristics of the skier, in particular at his skill level, but does not emit any signal of solidarity.
  • the fixing device can be precalibrated before the first descent in learning mode.
  • the user will indicate his own characteristics, for example his weight and / or his level of competence on a reduced level scale (for example, "beginner” / "average” / “confirmed") which will be integrated by the control circuit 2.
  • the fixing device will then operate, during the first descent, according to the parameters initially indicated by the user while determining, still during this first descent, the actual threshold parameters (for example threshold of angular acceleration and / or linear acceleration or deceleration of the ski beyond which the control circuit 2 must emit a decoupling signal) related to the skill level of the user.
  • the learning mode can be reiterated as many times as necessary, especially if the skier has dropped during the first descent.
  • the learning mode can also be progressive, the skier first making a first descent on a blue track, then a second on a red track, etc.
  • Such an embodiment is particularly interesting in particular because there is regularly an overestimation by the user of his own level of competence.
  • the secure fastening device prevents the risk of injury to the skier while allowing him to ski without removing shoes inappropriately. For example, a position of the snow-type skis backwards (approaching the rear ends and spacing of the front ends of the two skis) will not cause separation between the shoe and the ski if the skier moves towards the rear.
  • the fastening device thus allows skiing without risk of injury and without shoes shoes off when the situation is not a risk situation.
  • the device further allows to be associated with a conventional fixing comprising a purely mechanical secure system. The device thus takes into account, in order to evaluate risk situations, numerous parameters such as the relative position of the skis with each other, the direction of movement, the speed, the weight of the skier, his skill level, etc.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Braking Arrangements (AREA)

Abstract

The device for securely attaching a shoe to a first ski comprises an attachment member for attaching the shoe to the first ski and a control circuit. The attachment member is configured to assist the disengagement of the shoe from the first ski on receipt of a disengagement signal. A control circuit is configured to: · determine an angular offset between a first direction of the first ski and a second direction of a second ski, •determine the forward progression of the first and second skis along the longitudinal axis of each of said skis, •calculating at least one parameter from the angular offset and the forward progressions of the first and second skis, comparing the parameter with a threshold parameter, and transmitting the disengagement signal on the basis of the comparison.

Description

Fixation sécurisée de chaussure sur un ski  Secure shoe attachment on a ski
Domaine technique de l'invention Technical field of the invention
L'invention est relative à un dispositif de fixation sécurisée d'une chaussure sur un ski. The invention relates to a device for securely fastening a boot on a ski.
État de la technique State of the art
Les fixations de chaussures, notamment de chaussures de ski, permettent une solidarisation fiable et amovible d'une chaussure sur un ski. La désolidarisation entre la chaussure et le ski est effectuée soit volontairement par l'utilisateur grâce à un moyen mécanique, soit involontairement notamment lorsque certains efforts supérieurs à un seuil prédéfini sont appliqués sur l'un au moins des éléments de la fixation, par exemple en cas de chute du skieur. The bindings of shoes, especially ski boots, allow a reliable and removable fastening of a shoe on a ski. The separation between the boot and the ski is performed either voluntarily by the user by a mechanical means, or involuntarily in particular when certain forces greater than a predefined threshold are applied to at least one of the elements of the binding, for example in case of skier falling.
Le seuil prédéfini des efforts au-delà desquels la chaussure se désolidarise du ski (ou déchausse) est généralement réglable en fonction du poids de l'individu, de son niveau de compétence, de sa condition physique, etc. The predefined threshold of the forces beyond which the shoe disengages from the ski (or loosens) is generally adjustable according to the weight of the individual, his skill level, his physical condition, etc.
Un mauvais réglage des fixations entraîne : Incorrect adjustment of the fixings leads to:
- un risque accru d'accident par déclenchement (ou déchaussement) inopportun si le réglage est trop faible,  - an increased risk of accident by triggering (or loosening) inappropriate if the adjustment is too low,
- un risque accru de lésion du genou en cas de chute par non-déclenchement (non déchaussement) si le réglage est trop fort. En particulier, le non-déclenchement est le principal responsable des entorses du genou.  - an increased risk of knee injury in the event of a fall by non-release (non-off) if the setting is too strong. In particular, non-triggering is the main cause of knee sprains.
Les fixations conventionnelles les plus courantes comportent une talonnière et une butée avant, la talonnière exerçant une pression sur le talon de la chaussure, pressant ainsi la chaussure contre la butée avant. En cas de chute du skieur, les mâchoires de la talonnière et/ou de la butée avant s'ouvrent ou basculent automatiquement sous l'effet d'efforts supérieurs à un seuil prédéfini afin de libérer la chaussure. Il s'agit donc d'un moyen purement mécanique mis en œuvre par exemple à l'aide de simples ressorts. The most common conventional fasteners include a heel and a front stop, the heel pressing on the heel of the shoe, thus pressing the shoe against the front stop. In the event of a skier's fall, the jaws of the heel and / or of the front stop automatically open or tilt under the effect of forces greater than a predefined threshold in order to release the shoe. It is therefore a purely mechanical means implemented for example with the aid of simple springs.
Les fixations sont sans cesse améliorées. La demande de brevet FR 2 874 833 décrit en particulier une fixation de chaussure de ski qui améliore la sécurité des fixations en proposant une talonnière comprenant un moyen pour faciliter la rotation du talon de la chaussure selon un axe vertical en limitant les résistances par frottement de la semelle de la chaussure sur la fixation. Fixings are constantly improved. The patent application FR 2 874 833 describes in particular a ski boot binding which improves the safety of the bindings by proposing a heel piece comprising a means for facilitating the rotation of the heel of the boot along a vertical axis by limiting the frictional resistance of the shoe. the sole of the shoe on the binding.
Cependant, un tel dispositif n'entraîne pas la désolidarisation de la chaussure et du ski dans des situations potentiellement dangereuses. En particulier, ce type de dispositif ne protège pas le genou dans toutes les situations à risque car il ne présente pas de possibilité de désolidarisation entre la chaussure et le ski quels que soient les couples d'efforts appliqués sur la fixation et notamment quels que soient les axes de ces couples. However, such a device does not cause the separation of the shoe and the ski in potentially dangerous situations. In particular, this type of device does not protect the knee in all risk situations because there is no possibility of separation between the boot and the ski regardless of the torque applied to the attachment and in particular whatever the axes of these couples.
De plus, comme expliqué ci-dessus, pour une bonne efficacité, la fixation doit être convenablement réglée en fonction de paramètres propres au skieur et susceptibles d'évoluer dans le temps (poids du skieur, niveau de compétence, condition physique, etc). In addition, as explained above, for a good efficiency, the binding must be properly adjusted according to parameters specific to the skier and likely to change over time (weight of the skier, level of skill, physical condition, etc.).
Le brevet US 6,007,086 propose un dispositif de fixation de chaussure de ski ayant pour objectif de remédier à ces inconvénients. Ledit dispositif comprend en particulier un système de fixation d'une chaussure sur un ski à l'aide d'électro- aimants et d'un processeur configuré pour communiquer avec ledit système de fixation. Ce dispositif permet de désolidariser la chaussure du ski dès lors que des efforts supérieurs à un seuil prédéfini sont identifiés par le processeur. Par ailleurs, ce dispositif peut être complété par un émetteur placé à l'avant d'un premier ski et un récepteur placé de la même manière sur un deuxième ski, chacun des skis comportant un ensemble émetteur/récepteur en communication avec le processeur. Dans un tel système, l'émetteur d'un premier ski envoie un signal au récepteur du deuxième ski, le signal étant sous la forme d'un arc unidirectionnel. Dès lors que la communication est coupée entre un ensemble émetteur d'un ski/récepteur de l'autre ski, le processeur envoie un signal de désolidarisation au système de fixation. Un tel dispositif permet donc de déchausser dans des situations à risque pour le skieur, notamment lorsque les skis ont un écart angulaire anormal (US 6,007,086, Fig. 5b et 5c). US Pat. No. 6,007,086 proposes a ski boot binding device whose purpose is to overcome these disadvantages. Said device comprises in particular a system for attaching a boot to a ski using electromagnets and a processor configured to communicate with said fixing system. This device makes it possible to separate the boot from the ski when forces greater than a predefined threshold are identified by the processor. Furthermore, this device can be completed by a transmitter placed at the front of a first ski and a receiver placed in the same manner on a second ski, each of the skis comprising a transmitter / receiver assembly in communication with the processor. In such a system, the transmitter of a first ski sends a signal to the receiver of the second ski, the signal being in the form of a unidirectional arc. As soon as the communication is cut between a transmitting assembly of a ski / receiver of the other ski, the processor sends a disconnection signal to the fixing system. Such a device therefore makes it possible to take off in situations at risk for the skier, in particular when the skis have an abnormal angular gap (US 6,007,086, Fig. 5b and 5c).
Cependant, ce dispositif présente l'inconvénient majeur d'induire un déchaussement dans des situations non risquées ou lorsqu'un amas de neige entre les skis interrompt momentanément le signal. Inversement, ce système induit un déchaussement trop tardif lors de situations à risque. However, this device has the major disadvantage of inducing a fallout in non-risky situations or when a pile of snow between the skis momentarily interrupts the signal. Conversely, this system induces a fallout too late in risk situations.
Objet de l'invention Object of the invention
On constate qu'il existe un besoin d'un dispositif de fixation sécurisée d'une chaussure sur un ski qui détecte mieux les situations à risque. It is noted that there is a need for a secure fastening device of a shoe on a ski that better detects risk situations.
On tend à combler ce besoin au moyen d'un dispositif de fixation sécurisée d'une chaussure sur un premier ski comprenant : This need is filled by means of a secure fastening device of a boot on a first ski comprising:
un organe de fixation de la chaussure sur le premier ski configuré pour faciliter la désolidarisation entre la chaussure et le premier ski à réception d'un signal de désolidarisation,  an attachment member of the boot on the first ski configured to facilitate the separation between the boot and the first ski on receipt of a disconnection signal,
un circuit de commande configuré pour :  a control circuit configured for:
déterminer un écart angulaire entre une première direction du premier ski et une deuxième direction d'un deuxième ski,  determining an angular difference between a first direction of the first ski and a second direction of a second ski,
déterminer la progression vers l'avant des premier et deuxième skis selon l'axe longitudinal de chacun desdits skis,  determining the forward progression of the first and second skis along the longitudinal axis of each of said skis,
• calculer au moins un paramètre à partir de l'écart angulaire et des progressions vers l'avant des premier et deuxième skis, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison.  Calculating at least one parameter from the angular deviation and forward progressions of the first and second skis, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
Selon un mode de réalisation préféré, le circuit de commande est configuré pour :According to a preferred embodiment, the control circuit is configured to:
• déterminer un écart angulaire entre une première direction du premier ski et une deuxième direction d'un deuxième ski, Determining an angular difference between a first direction of the first ski and a second direction of a second ski,
• déterminer la première direction de progression du premier ski et la deuxième direction de progression du deuxième ski, • calculer au moins un paramètre à partir de l'écart angulaire, de la première direction de progression et de la deuxième direction de progression, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison. Determine the first direction of progression of the first ski and the second direction of progression of the second ski, Calculating at least one parameter from the angular deviation, the first progression direction and the second progression direction, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
Selon un mode de réalisation encore plus préféré, le circuit de commande est configuré pour : According to an even more preferred embodiment, the control circuit is configured to:
• déterminer un premier angle entre la première direction du premier ski et une première direction de référence fixe,  Determining a first angle between the first direction of the first ski and a first fixed reference direction,
• déterminer un deuxième angle entre la deuxième direction du deuxième ski et une deuxième direction de référence fixe,  Determining a second angle between the second direction of the second ski and a second fixed reference direction,
• calculer au moins un paramètre à partir du premier angle, du deuxième angle, de la première direction de progression et de la deuxième direction de progression.  Calculating at least one parameter from the first angle, the second angle, the first direction of progression and the second direction of progression.
Avantageusement, la première et la deuxième directions de référence correspondent au nord magnétique. Advantageously, the first and second reference directions correspond to magnetic north.
Selon un mode de réalisation particulièrement avantageux, le circuit de commande est configuré pour évaluer la vitesse de déplacement du premier ski. According to a particularly advantageous embodiment, the control circuit is configured to evaluate the speed of movement of the first ski.
Préférentiellement, le circuit de commande comprend en outre au moins un gyroscope et/ou au moins un accéléromètre. Le gyroscope peut être réalisé par tout moyen adapté. Dans un mode de réalisation particulier, le gyroscope est réalisé par un ensemble d'accéléromètres connectés à un calculateur intégrant en continu les accélérations. Plus préférentiellement encore, le circuit de commande comprend au moins une centrale inertielle et, éventuellement, une boussole. Il peut s'agir d'une boussole bidimensionnelle ou d'une boussole tridimensionnelle. Dans le cas d'une boussole tridimensionnelle, la boussole indique le vecteur tridimensionnel que fait le champ magnétique terrestre par rapport au circuit de commande. Preferably, the control circuit further comprises at least one gyroscope and / or at least one accelerometer. The gyroscope can be made by any suitable means. In a particular embodiment, the gyroscope is made by a set of accelerometers connected to a computer continuously integrating accelerations. More preferably still, the control circuit comprises at least one inertial unit and possibly a compass. It can be a two-dimensional compass or a three-dimensional compass. In the case of a three-dimensional compass, the compass indicates the three-dimensional vector that the terrestrial magnetic field makes with respect to the control circuit.
Selon un mode de réalisation avantageux, le circuit de commande de chaque ski comprend un capteur et un circuit de calcul configuré pour calculer le ou les paramètres. Selon un autre mode de réalisation, le dispositif comporte une lame piézoélectrique configurée pour s'intégrer dans le ski et en ce que le circuit de commande est configuré pour discriminer un glissement du ski et un autre déplacement du ski en contrôlant la puissance électrique générée par la lame piézoélectrique. Préférentiellement, la lame piézoélectrique est configurée pour alimenter l'intégralité du dispositif de fixation sécurisée. According to an advantageous embodiment, the control circuit of each ski comprises a sensor and a calculation circuit configured to calculate the parameter or parameters. According to another embodiment, the device comprises a piezoelectric blade configured to integrate into the ski and in that the control circuit is configured to discriminate a sliding of the ski and another movement of the ski by controlling the electrical power generated by the piezoelectric blade. Preferably, the piezoelectric blade is configured to supply the entire secure fastening device.
Avantageusement, l'organe de fixation comprend une butée avant, une talonnière et au moins une platine pivotante placée entre la butée avant et le ski et/ou entre la talonnière et le ski. Préférentiellement, la platine pivotante est configurée pour être bloquée en cas d'absence de signal de désolidarisation. Advantageously, the fixing member comprises a front stop, a heel and at least one pivoting plate placed between the front stop and the ski and / or between the heel and the ski. Preferably, the turntable is configured to be blocked in the absence of a disconnection signal.
Selon un mode de réalisation avantageux, le dispositif comporte un premier circuit de commande configuré pour être associé à un ski droit et une deuxième circuit de commande configuré pour être associé à un ski gauche. According to an advantageous embodiment, the device comprises a first control circuit configured to be associated with a straight ski and a second control circuit configured to be associated with a left ski.
Selon un autre mode de réalisation, le circuit de commande est configuré pour déterminer quel ski est le ski droit et quel ski est le ski gauche par rapport à la chaussure avec laquelle est associé chaque ski. According to another embodiment, the control circuit is configured to determine which ski is the right ski and which ski is the left ski relative to the shoe with which each ski is associated.
Description sommaire des dessins Brief description of the drawings
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés à la figure 1 qui illustre, de manière schématique en vue de dessus, un mode de réalisation d'un dispositif de fixation sécurisée. Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention given by way of non-limiting example and shown in FIG. 1, which schematically illustrates, in a top view, a embodiment of a secure fastening device.
Description de modes de réalisation préférentiels de l'invention DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION
Le dispositif de fixation sécurisée d'une chaussure sur un ski comporte un organe de fixation 1 de la chaussure sur un premier ski configuré pour faciliter la désolidarisation entre la chaussure et le premier ski à réception d'un signal de désolidarisation. The device for securely fastening a boot to a ski has an organ fastening 1 of the boot on a first ski configured to facilitate the separation between the boot and the first ski on receiving a decoupling signal.
L'organe de fixation 1 peut être tout moyen de fixation d'une chaussure sur un ski bien connu de l'homme du métier. The fastener 1 may be any means for attaching a boot to a ski well known to those skilled in the art.
Selon un mode de réalisation particulier, le dispositif de fixation comprend une platine pivotante 3 placée entre la butée avant et le ski et/ou entre la talonnière et le ski afin de permettre à la chaussure de déchausser plus facilement et de réduire le risque de blessure pour le skieur. De cette manière, l'organe de fixation 1 présente deux comportements différents. According to a particular embodiment, the fixing device comprises a pivoting plate 3 placed between the front stop and the ski and / or between the heel and the ski to allow the shoe to remove more easily and reduce the risk of injury for the skier. In this way, the fastener 1 has two different behaviors.
Préférentiellement, il s'agit de fixations conventionnelles comportant une butée avant et une talonnière auxquelles est associée au moins une platine pivotante placée entre le ski et la butée avant et/ou entre le ski et la talonnière. Preferably, it is conventional fasteners comprising a front stop and a heel with which is associated at least one pivoting plate placed between the ski and the stop before and / or between the ski and the heel.
Par « fixations conventionnelles », on entend toute fixation telle que décrite précédemment susceptible de fixer mécaniquement la chaussures au ski et de la désolidariser, notamment lorsque des efforts supérieurs à un seuil prédéfini sont appliqués sur l'un au moins des éléments de la fixation. By "conventional fasteners" is meant any fastener as described above capable of mechanically fastening the ski boots to the ski and to separate it, especially when forces greater than a predefined threshold are applied to at least one of the elements of the binding.
La platine pivotante 3 est configurée pour tourner, par exemple de plus ou moins 60°, autour d'un axe vertical par rapport au plan principal du ski parallèle à la surface de glissement dudit ski. The turntable 3 is configured to rotate, for example more or less 60 °, about a vertical axis relative to the main plane of the ski parallel to the sliding surface of said ski.
Dans un mode de réalisation particulier, la platine pivotante 3 comporte un mécanisme électromécanique permettant In a particular embodiment, the turntable 3 comprises an electromechanical mechanism allowing
soit d'immobiliser la platine 3,  to immobilize the plate 3,
soit, à réception d'un signal de désolidarisation, de laisser la platine 3 pivoter librement avec une certaine amplitude, par exemple de plus ou moins 60° par rapport la position précédente.  or, upon receiving a decoupling signal, to let the plate 3 freely rotate with a certain amplitude, for example more or less 60 ° with respect to the previous position.
Lorsque la platine 3 est immobilisée, il en est de même pour la fixation qui est montée sur la platine 3. Dans cette position, l'utilisateur peut skier et l'organe de fixation 1 fonctionne avantageusement comme dans l'art antérieur. When the plate 3 is immobilized, it is the same for the fixation which is mounted on the plate 3. In this position, the user can ski and the fastener 1 works advantageously as in the prior art.
Lorsque la platine 3 est libérée, elle peut pivoter tout comme la fixation. Cette liberté de rotation permet à la chaussure de déchausser plus facilement en s'échappant latéralement par rapport au ski pour diminuer les risques de lésion pour le skieur, notamment de lésion du genou. When the plate 3 is released, it can rotate as the attachment. This freedom of rotation allows the boot to remove more easily by escaping laterally relative to the ski to reduce the risk of injury to the skier, including knee injury.
Le dispositif de fixation comporte également un circuit de commande 2 configuré pour : The fixing device also comprises a control circuit 2 configured for:
• déterminer un écart angulaire entre une première direction du premier ski et une deuxième direction d'un deuxième ski,  Determining an angular difference between a first direction of the first ski and a second direction of a second ski,
• déterminer la progression vers l'avant des premier et deuxième skis selon l'axe longitudinal de chacun desdits skis,  Determining the forward progression of the first and second skis along the longitudinal axis of each of said skis,
• calculer au moins un paramètre à partir de l'écart angulaire et des progressions vers l'avant des premier et deuxième skis, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison.  Calculating at least one parameter from the angular deviation and forward progressions of the first and second skis, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
Le circuit de commande 2 est configuré pour bloquer l'organe de fixation 1 dans une position fonctionnelle pour skier, par exemple pour bloquer la platine pivotante 3 dans sa configuration non pivotante, en cas d'absence de signal de désolidarisation. The control circuit 2 is configured to lock the fastener 1 in a functional position to ski, for example to lock the turntable 3 in its non-pivoting configuration, in the absence of a disconnection signal.
De cette manière, par défaut, la platine 3 est en position bloquée de sorte qu'en cas de défaillance du circuit de commande 2 ou en l'absence du signal, le dispositif de fixation fonctionne comme dans l'art antérieur. L'utilisateur est toujours protégé mais de manière moins efficace, par exemple comme dans l'art antérieur. In this way, by default, the plate 3 is in the locked position so that in case of failure of the control circuit 2 or in the absence of the signal, the fixing device operates as in the prior art. The user is always protected but less effectively, for example as in the prior art.
La connaissance de l'écart angulaire entre les deux skis et de leur progression vers l'avant permet de discriminer rapidement entre une situation à risque et une situation normale. The knowledge of the angular difference between the two skis and their forward progression makes it possible to quickly discriminate between a situation at risk and a normal situation.
Préférentiellement, chaque ski comprend un dispositif de fixation comprenant au moins un organe de fixation 1 et un circuit de commande 2. Avantageusement, le circuit de commande 2 de chaque ski comprend un ou plusieurs capteurs et un circuit de calcul pour calculer le ou les paramètres. Preferably, each ski comprises a fixing device comprising at least one fastener 1 and a control circuit 2. Advantageously, the control circuit 2 of each ski comprises one or more sensors and a calculation circuit for calculating the parameter or parameters.
Le circuit de commande 2 du premier ski peut être connecté à l'organe de fixation 1 par une connexion filaire. Ceci permet notamment de réduire la consommation électrique du dispositif de fixation. The control circuit 2 of the first ski can be connected to the fixing member 1 by a wire connection. This allows in particular to reduce the power consumption of the fixing device.
Le circuit de commande 2 est en mesure de connaître la configuration spatiale des deux skis et de déterminer si la situation est une situation à risque ou une situation non dangereuse. De cette manière, par rapport aux dispositifs de l'art antérieur, la désolidarisation dans des situations non dangereuses est réduite. The control circuit 2 is able to know the spatial configuration of the two skis and to determine if the situation is a risky situation or a non-dangerous situation. In this way, compared with the devices of the prior art, the uncoupling in non-hazardous situations is reduced.
Selon un mode de réalisation préféré, un premier circuit de commande 2 est fixé sur le premier ski de manière à déterminer un ou plusieurs paramètres spécifiques au premier ski. Un deuxième circuit de commande 2 est fixé sur le deuxième ski de manière à déterminer un ou plusieurs paramètres spécifiques au deuxième ski. L'utilisation d'un circuit de commande 2 dédié à chaque ski permet de faciliter le calcul des différents paramètres recherchés. Cela implique cependant généralement de savoir quel ski est le ski droit et quel autre ski est le ski gauche. Une telle détermination peut être réalisée soit par une prédétermination initiale d'un ski droit et d'un ski gauche dès la conception des skis, soit par un paramétrage des skis dès qu'ils sont associés à une chaussure droite ou à une chaussure gauche. Ainsi, selon un premier mode de réalisation, le dispositif de fixation sécurisée comporte un premier circuit de calcul configuré pour être associé à un ski droit et une deuxième circuit de calcul configuré pour être associé à un ski gauche et, selon un second mode de réalisation, le circuit de commande 2 est configuré pour déterminer quel ski est le ski droit et quel ski est le ski gauche par rapport à la chaussure avec laquelle est associé chaque ski. Le second mode de réalisation présente l'avantage de pouvoir utiliser deux skis identiques. According to a preferred embodiment, a first control circuit 2 is fixed on the first ski so as to determine one or more parameters specific to the first ski. A second control circuit 2 is fixed on the second ski so as to determine one or more parameters specific to the second ski. The use of a control circuit 2 dedicated to each ski makes it easier to calculate the various desired parameters. This, however, generally involves knowing which ski is the right ski and which other ski is the left ski. Such a determination can be made either by an initial predetermination of a right ski and a left ski as soon as the skis are designed, or by a setting of the skis as soon as they are associated with a right shoe or a left shoe. Thus, according to a first embodiment, the secure fastening device comprises a first calculation circuit configured to be associated with a straight ski and a second calculation circuit configured to be associated with a left ski and, according to a second embodiment , the control circuit 2 is configured to determine which ski is the right ski and which ski is the left ski relative to the shoe with which each ski is associated. The second embodiment has the advantage of being able to use two identical skis.
De manière avantageuse, le circuit de commande 2 de chaque ski envoie les informations relatives à son ski vers un circuit de calcul. Le circuit de calcul est alors en mesure de calculer le paramètre. De manière avantageuse, les informations sont transmises en permanence ou de manière périodique. Dans un mode de réalisation avantageux, le circuit de calcul est fixé sur un des skis. De manière encore plus avantageuse, chaque ski comporte un circuit de calcul qui reçoit des informations des différents capteurs. Préférentiellement, le circuit de calcul est relié par une liaison fiiaire, au circuit de commande 2 de son ski, aux éventuels autres capteurs et à l'organe de fixation 1 de son ski. Advantageously, the control circuit 2 of each ski sends the information relating to its ski to a calculation circuit. The calculation circuit is then able to calculate the parameter. Advantageously, the information is transmitted permanently or periodically. In one embodiment Advantageously, the calculation circuit is fixed on one of the skis. Even more advantageously, each ski has a calculation circuit which receives information from the different sensors. Preferably, the calculation circuit is connected by a fii link, to the control circuit 2 of his ski, to the possible other sensors and to the attachment member 1 of his ski.
Avantageusement, le circuit de commande 2 du premier ski communique de manière périodique ou de manière continue avec le circuit de commande 2 du deuxième ski. Advantageously, the control circuit 2 of the first ski communicates periodically or continuously with the control circuit 2 of the second ski.
La communication entre les deux skis est préférentiellement une communication sans fil, par exemple avec une liaison radiofréquence. Cependant, il est également envisageable d'utiliser une connexion fiiaire au moyen d'un fil conducteur intégré dans les chaussures de ski et dans le pantalon du skieur. La communication entre les deux circuits de commande 2 peut, à titre d'exemple, être digitalement encodée. Il peut s'agir plus préférentiellement d'une onde radio cryptée. The communication between the two skis is preferentially a wireless communication, for example with a radio frequency link. However, it is also conceivable to use a fiancial connection by means of a thread integrated in the ski boots and in the pants of the skier. The communication between the two control circuits 2 may, for example, be digitally encoded. It may be more preferably an encrypted radio wave.
Dans un autre mode de réalisation pouvant être combiné avec les modes de réalisation précédents, le dispositif de fixation sécurisée comprend en outre un capteur configuré pour déterminer si la chaussure d'un des deux skis a déchaussé. Le capteur est configuré pour déterminer si la chaussure est fixée ou non. Dans le cas où le capteur détecte qu'une première chaussure a déchaussé, ledit capteur communique le déchaussage au capteur ou au circuit de commande 2 de l'autre ski et le circuit de commande 2 de cet autre ski facilite la désolidarisation de la seconde chaussure. Un signal de désolidarisation est alors envoyé à l'organe de fixation 1 de l'autre ski. Ainsi, dès qu'une chaussure a déchaussé, l'autre chaussure déchausse également. Cette configuration permet de réduire les risques de blessures. Le capteur peut être réalisé par tout moyen connu de l'homme du métier, par exemple par un système aimanté ou tout autre système passif apte à détecter deux signaux différents indiquant par exemple « absence de chaussure », « chaussure droite » ou « chaussure gauche ». In another embodiment that can be combined with the preceding embodiments, the secure fastening device further comprises a sensor configured to determine whether the shoe of one of the two skis has loosened. The sensor is configured to determine whether the shoe is fixed or not. In the case where the sensor detects that a first shoe has loosened, said sensor communicates the heave to the sensor or to the control circuit 2 of the other ski and the control circuit 2 of the other ski facilitates the separation of the second shoe . A disconnection signal is then sent to the fixing member 1 of the other ski. Thus, as soon as one shoe has taken off, the other shoe also takes off. This configuration reduces the risk of injury. The sensor can be made by any means known to those skilled in the art, for example by a magnet system or any other passive system capable of detecting two different signals indicating for example "no shoe", "right shoe" or "left shoe ".
Dans un mode de réalisation avantageux, le dispositif de fixation comporte également un circuit de commande 2 configuré pour : déterminer l'écart angulaire entre la première direction du premier ski et la deuxième direction du deuxième ski, et In an advantageous embodiment, the fixing device also comprises a control circuit 2 configured to: determining the angular difference between the first direction of the first ski and the second direction of the second ski, and
• déterminer une première direction de progression du premier ski et une deuxième direction de progression du deuxième ski,  Determining a first direction of progression of the first ski and a second direction of progression of the second ski,
• calculer au moins un paramètre à partir de l'écart angulaire, de la première direction de progression et de la deuxième direction de progression, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison.  Calculating at least one parameter from the angular deviation, the first progression direction and the second progression direction, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
Selon ce mode de réalisation, le circuit de commande 2 est donc configuré pour déterminer, en plus, le sens de progression des premier et deuxième skis quelle que soit la direction de progression des skis par rapport à leur axe longitudinal et/ou quel que soit leur sens de progression (avant, arrière, gauche, droite, etc). Ceci peut être réalisé par tout moyen bien connu de l'homme du métier, par exemple en intégrant un dispositif de géolocalisation, au moins un accéléromètre et/ou au moins un gyroscope dans chaque ski. Ainsi, grâce à un tel système de commande, le dispositif de fixation sécurisée permet une meilleure évaluation des situations à risque. De manière avantageuse, le gyroscope peut être réalisé au moyen d'un ensemble d'accéléromètres connectés à un calculateur qui intègre en continu les accélérations. Cette fonctionnalité peut être obtenue par exemple au moyen d'un capteur 9 axes. According to this embodiment, the control circuit 2 is therefore configured to determine, in addition, the direction of progression of the first and second skis irrespective of the direction of progression of the skis with respect to their longitudinal axis and / or whatever their direction of progression (forward, back, left, right, etc.). This can be achieved by any means well known to those skilled in the art, for example by integrating a geolocation device, at least one accelerometer and / or at least one gyroscope in each ski. Thus, thanks to such a control system, the secure fastening device allows a better evaluation of risk situations. Advantageously, the gyroscope can be produced by means of a set of accelerometers connected to a computer which continuously integrates the accelerations. This functionality can be obtained for example by means of a 9-axis sensor.
De cette manière, le circuit de commande 2 est en mesure de connaître la configuration spatiale des deux skis et de déterminer si la situation est une situation à risque ou une situation non dangereuse. A titre d'exemple, dans certaines configurations, le skieur réalise un déplacement en marche arrière à faible vitesse et il s'arrête dans une configuration qui est considérée comme une configuration à risque si le skieur avance dans le sens normal de progression. De cette manière, par rapport aux dispositifs de l'art antérieur, la désolidarisation dans des situations non dangereuses est réduite. In this way, the control circuit 2 is able to know the spatial configuration of the two skis and to determine whether the situation is a risk situation or a non-dangerous situation. For example, in some configurations, the skier performs a reverse movement at low speed and stops in a configuration that is considered a risk configuration if the skier advances in the normal direction of progression. In this way, compared with the devices of the prior art, the uncoupling in non-hazardous situations is reduced.
Dans un mode de réalisation particulièrement avantageux, le circuit de commande 2 est configuré pour : In a particularly advantageous embodiment, the control circuit 2 is configured to:
• déterminer un premier angle entre une première direction du premier ski et une première direction de référence fixe, • determine a first angle between a first direction of the first ski and a first fixed reference direction,
• déterminer un deuxième angle entre une deuxième direction du deuxième ski et une deuxième direction de référence fixe.  • determine a second angle between a second direction of the second ski and a second fixed reference direction.
Le premier angle et le deuxième angle servent à déterminer l'écart angulaire qui existe entre les deux skis. Ce mode de réalisation est plus simple à mettre en place et il est également plus robuste. The first angle and the second angle are used to determine the angular difference between the two skis. This embodiment is simpler to implement and is also more robust.
Le circuit de commande 2 est configuré pour calculer au moins un paramètre à partir du premier angle, du deuxième angle, de la première direction de progression et de la deuxième direction de progression, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison. The control circuit 2 is configured to calculate at least one parameter from the first angle, the second angle, the first direction of progression and the second direction of progression, to compare the parameter with a threshold parameter, and to transmit the signal of uncoupling according to the comparison.
Le paramètre seuil est intégré dans le circuit de commande 2, il peut être évalué par modélisation des situations à risque en tenant compte d'une partie ou de tous les paramètres mesurés par le dispositif de fixation. The threshold parameter is integrated in the control circuit 2, it can be evaluated by modeling risk situations taking into account some or all the parameters measured by the fixing device.
Préférentiellement, la première direction de référence est identique à la seconde direction de référence. A titre d'exemple, une des directions de référence est déterminée par rapport à une balise ou par rapport au nord magnétique. Preferably, the first reference direction is identical to the second reference direction. For example, one of the reference directions is determined relative to a beacon or relative to the magnetic north.
Plus préférentiellement encore, la première et la deuxième directions de référence correspondent au nord magnétique. Ceci permet une mesure facile au moyen d'une grandeur indépendante et détectable aisément au moyen, par exemple, d'une simple boussole ou, préférentiellement, d'une boussole tridimensionnelle. Dans le cas d'une boussole bidimensionnelle, une information sur la direction du nord est fournie. Dans le cas d'une boussole tridimensionnelle, la boussole indique également le vecteur tridimensionnel que fait le champ magnétique terrestre avec le circuit de commande. More preferably still, the first and second reference directions correspond to magnetic north. This allows an easy measurement by means of an independent and easily detectable quantity by means of, for example, a simple compass or, preferably, a three-dimensional compass. In the case of a two-dimensional compass, information on the north direction is provided. In the case of a three-dimensional compass, the compass also indicates the three-dimensional vector that the earth's magnetic field makes with the control circuit.
La détermination des orientations des skis et la détermination des directions de progression des skis peuvent être réalisées par tout moyen adapté, par exemple au moyen d'un dispositif de géolocalisation tel qu'un GPS. Cependant, il faut s'assurer que les capacités du système GPS sont en mesure de distinguer les positions des deux skis. The determination of the orientations of the skis and the determination of the progression directions of the skis can be carried out by any suitable means, for example by means of a geolocation device such as a GPS. However, it must be ensured that the capabilities of the GPS system are able to distinguish the positions of the two skis.
Dans un mode de réalisation préféré, le dispositif de fixation sécurisée est configuré pour être désengagé manuellement, par exemple à l'aide d'une télécommande. Ainsi, dans toutes les situations où le skieur ne souhaite pas profiter du dispositif, par exemple lors que le skieur emprunte un télésiège ou pour la pratique du ski extrême, le dispositif peut être complètement mis à l'arrêt. In a preferred embodiment, the secure fastening device is configured to be disengaged manually, for example using a remote control. Thus, in all situations where the skier does not wish to take advantage of the device, for example when the skier takes a chairlift or for the practice of extreme skiing, the device can be completely stopped.
Dans un autre mode de réalisation pouvant être combiné avec les modes de réalisation précédents, le circuit de commande 2 est configuré pour entraîner la désolidarisation des deux chaussures. In another embodiment that can be combined with the previous embodiments, the control circuit 2 is configured to cause the separation of the two shoes.
Selon un mode de réalisation, le circuit de commande 2 comprend une centrale inertielle et la boussole du circuit de commande 2 permet une recalibration de la centrale inertielle. Préférentiellement la recalibration est réalisée lorsque la boussole se trouve dans un plan normal ou sensiblement normal au rayon de la terre. Cette recalibration est particulièrement avantageuse pour une boussole bidimensionnelle. La recalibration peut également être réalisée en tenant compte de la gravité afin de déterminer la position des skis dans un plan normal à la terre. Lorsque la boussole est tridimensionnelle, la recalibration peut s'effectuer quel que soit la position de ladite boussole par rapport au rayon de la terre. Selon un mode particulièrement préféré, le circuit de commande 2 est configuré pour être recalibré périodiquement. La centrale inertielle permet de déterminer l'orientation du ski notamment lorsque la mesure de la boussole est très bruitée ou perturbée par des éléments métalliques. Cette configuration permet d'avoir une mesure fiable dans une très grande variété de configurations. According to one embodiment, the control circuit 2 comprises an inertial unit and the compass of the control circuit 2 allows a recalibration of the inertial unit. Preferably the recalibration is performed when the compass is in a normal plane or substantially normal to the radius of the earth. This recalibration is particularly advantageous for a two-dimensional compass. The recalibration can also be performed taking into account the gravity to determine the position of the skis in a plane normal to the ground. When the compass is three-dimensional, recalibration can be performed regardless of the position of said compass with respect to the radius of the earth. According to a particularly preferred mode, the control circuit 2 is configured to be recalibrated periodically. The inertial unit makes it possible to determine the orientation of the ski, especially when the measurement of the compass is very noisy or disturbed by metallic elements. This configuration allows for reliable measurement in a wide variety of configurations.
Selon un mode de réalisation particulier, le circuit de commande 2 peut également être configuré pour évaluer la vitesse de déplacement d'un des skis tel que le premier ski ou des deux skis. A cette fin, le circuit de commande 2 peut également comprendre au moins un accéléromètre. L'évaluation de la vitesse permet de mieux déterminer les situations à risque. A titre d'exemple, un chasse-neige où les skis sont particulièrement écartés vers l'arrière entraînera une désolidarisation chaussure/ski si le skieur est à vitesse élevée tandis que la désolidarisation n'aura pas lieu à l'arrêt ou à très faible vitesse. According to a particular embodiment, the control circuit 2 can also be configured to evaluate the speed of movement of one of the skis such as the first ski or both skis. For this purpose, the control circuit 2 may also comprise at least one accelerometer. The evaluation of the speed makes it possible to better determine the situations at risk. For example, a snowplow where the skis are particularly pushed backwards will result in a separation shoe / ski if the skier is at high speed while the uncoupling will not not at a standstill or at very low speed.
Selon un mode de réalisation particulier compatible avec les modes précédents, le circuit de commande 2 est configuré pour discriminer un glissement du ski sur la piste et un autre déplacement du ski, par exemple un déplacement sur un télésiège. En effet, les skis peuvent être immobiles sur le télésiège mais présenter une vitesse de déplacement qui peut être importante. De manière avantageuse, le ski comporte un film en matériau piézoélectrique ou lame piézoélectrique 4 préférentiellement intégrée dans le ski. De cette manière, lorsque le ski glisse sur la neige avec le skieur, le ski se déforme et vibre permettant ainsi à la lame piézoélectrique 4 de générer de l'électricité. En revanche, lorsque le ski se déplace dans un télésiège, les déformations du ski sont faibles, il n'existe peu ou pas de torsion ou déformation de la lame piézoélectrique 4 et l'électricité générée par la lame piézoélectrique 4 est alors extrêmement faible. Il est ainsi possible de distinguer ces deux cas de figure en contrôlant la puissance électrique générée par la lame piézoélectrique 4. Le circuit de commande 2 est avantageusement configuré pour contrôler la puissance électrique fournie par la lame piézoélectrique 4 afin de déterminer si le ski glisse sur la neige ou pas. De cette manière, le circuit de commande 2 est configuré pour discriminer un glissement du premier ski et une autre action en contrôlant la puissance électrique produite par la lame piézoélectrique 4 dans le premier ski. Lorsque la puissance électrique produite est inférieure à un seuil donné, le circuit de commande 2 bloque l'organe de fixation 1 de sorte que le dispositif de fixation fonctionne comme dans l'art antérieur. According to a particular embodiment compatible with the previous modes, the control circuit 2 is configured to discriminate a ski slip on the track and another movement of the ski, for example a trip on a chairlift. Indeed, skis can be stationary on the chairlift but have a speed of movement that can be important. Advantageously, the ski comprises a film of piezoelectric material or piezoelectric plate 4 preferably integrated in the ski. In this way, when the ski slides on the snow with the skier, the ski deforms and vibrates thus allowing the piezoelectric blade 4 to generate electricity. On the other hand, when the ski moves in a chairlift, the deformations of the ski are weak, there is little or no torsion or deformation of the piezoelectric plate 4 and the electricity generated by the piezoelectric plate 4 is then extremely low. It is thus possible to distinguish these two cases by controlling the electrical power generated by the piezoelectric blade 4. The control circuit 2 is advantageously configured to control the electric power supplied by the piezoelectric blade 4 to determine if the ski slides on snow or not. In this way, the control circuit 2 is configured to discriminate a slip of the first ski and another action by controlling the electric power produced by the piezoelectric blade 4 in the first ski. When the electric power produced is below a given threshold, the control circuit 2 blocks the fixing member 1 so that the fixing device operates as in the prior art.
Dans un mode de réalisation préférentiel, la lame piézoélectrique 4 est également configurée pour alimenter au moins partiellement le dispositif de fixation sécurisée. Avantageusement, la lame piézoélectrique 4 alimente l'intégralité du dispositif de fixation sécurisée. In a preferred embodiment, the piezoelectric blade 4 is also configured to supply at least partially the secure fastening device. Advantageously, the piezoelectric blade 4 supplies the entire secure fastening device.
Dans un mode de réalisation particulier, la lame piézoélectrique 4 est couplée à des super-condensateurs ou à des batteries miniatures. Lors de son utilisation, la lame piézoélectrique 4 se déforme et génère un courant électrique qui alimente les dispositifs électroniques du dispositif de fixation. Selon un mode avantageux de réalisation, le dispositif de fixation fonctionne selon un mode économie d'énergie en particulier en cas de désolidarisation entre les chaussures et les organes de fixation 1 ou encore en cas d'absence ou de faible production d'énergie par les lames piézoélectriques 4. Dans ce cas de figure, il n'y a pas de communication entre les skis. In a particular embodiment, the piezoelectric plate 4 is coupled to super-capacitors or miniature batteries. In use, the piezoelectric blade 4 deforms and generates an electric current which supplies the electronic devices of the fixing device. According to an advantageous embodiment, the fastening device operates in an energy saving mode, in particular in case of separation between the shoes and the fasteners 1 or in the event of absence or low energy production by the fasteners. piezoelectric blades 4. In this case, there is no communication between the skis.
Selon un mode préféré de réalisation, le circuit de commande 2 comporte, une centrale inertielle éventuellement recalibrée périodiquement à l'aide d'une boussole bidimensionnelle ou, préférentiellement, d'une boussole tridimensionnelle.According to a preferred embodiment, the control circuit 2 comprises an optionally recalibrated periodically inertial unit with a two-dimensional compass or, preferably, a three-dimensional compass.
Avantageusement, chaque ski est suivi continuellement par son circuit de commande 2 qui détecte un changement brusque de direction ou une décélération brutale. Ainsi, dès lors que le circuit de commande 2 détecte une accélération angulaire et/ou une accélération ou décélération linéaire du ski supérieure à un seuil prédéfini, il émet un signal de désolidarisation à l'organe de fixation 1 dudit ski. Le seuil d'accélération angulaire et/ou d'accélération ou décélération linéaire du ski peut être fixé manuellement ou établi lors d'un mode apprentissage du dispositif de fixation. Un tel mode de réalisation permet au skieur de déchausser immédiatement dès qu'un ski est stoppé ou dévié par un obstacle, ceci quels que soient les efforts appliqués sur l'organe de fixation 1 . Advantageously, each ski is continuously monitored by its control circuit 2 which detects a sudden change of direction or a sudden deceleration. Thus, when the control circuit 2 detects an angular acceleration and / or a linear acceleration or deceleration of the ski greater than a predefined threshold, it emits a disconnection signal to the fixing member 1 of said ski. The threshold of angular acceleration and / or linear acceleration or deceleration of the ski can be set manually or established during a learning mode of the fixing device. Such an embodiment allows the skier to take off immediately as soon as a ski is stopped or deflected by an obstacle, whatever the forces applied to the fastener 1.
Selon un mode de réalisation préféré, en cas d'absence de communication entre les deux skis, le circuit de commande 2 bloque l'organe de fixation 1 de sorte que le dispositif de fixation fonctionne comme dans l'art antérieur. Ainsi, lorsque le dispositif de fixation comporte une platine pivotante 3, celle-ci se trouve en position immobilisée, apte à permettre de skier, en cas d'absence de communication entre les deux skis. L'utilisateur est donc toujours protégé mais de manière moins efficace, par exemple comme dans l'art antérieur. Préférentiellement, en cas d'absence de communication entre les deux skis, le circuit de commande 2 n'émet aucun signal de désolidarisation sauf dans le cas d'une accélération angulaire et/ou d'une accélération ou décélération linéaire du ski supérieure à un seuil prédéfini, comme ceci a été décrit précédemment. According to a preferred embodiment, in the absence of communication between the two skis, the control circuit 2 blocks the fixing member 1 so that the fixing device operates as in the prior art. Thus, when the fixing device comprises a pivoting plate 3, it is in the immobilized position, able to allow skiing, in the absence of communication between the two skis. The user is therefore always protected but less effectively, for example as in the prior art. Preferably, in the absence of communication between the two skis, the control circuit 2 emits no disconnection signal except in the case of an angular acceleration and / or a linear acceleration or deceleration of the ski greater than one. predefined threshold, as previously described.
Dans un mode de réalisation particulièrement avantageux, le circuit de commande 2 comprend au moins une centrale inertielle. Une centrale inertielle est disposée sur chaque ski et les circuits de commande 2 sont configurés pour réaliser la calibration des deux centrales inertielles. De cette manière, lors de l'étape de calibration, la disposition des deux skis est déterminée. Lorsque le skieur se déplace, les deux centrales inertielles calculent de proche en proche, les composantes de déplacement et de vitesse ce qui permet au circuit de commande 2 de déterminer l'écart angulaire et les direction d'orientation des deux skis. L'utilisation d'une centrale inertielle est particulièrement avantageuse car cela permet de calculer l'angle que fait chaque ski avec sa direction de référence dans des lieux très parasités. Par exemple, si la direction de référence est le nord magnétique, il est difficile de déterminer les premier et deuxième angles dans une zone présentant par exemple des câbles électriques enterrés. In a particularly advantageous embodiment, the control circuit 2 comprises at least one inertial unit. An inertial unit is arranged on each ski and the control circuits 2 are configured to perform the calibration of the two inertial units. In this way, during the calibration step, the arrangement of the two skis is determined. When the skier moves, the two inertial units calculate gradually, the displacement and speed components which allows the control circuit 2 to determine the angular difference and direction of orientation of the two skis. The use of an inertial unit is particularly advantageous because it makes it possible to calculate the angle that each ski makes with its reference direction in highly parasitic places. For example, if the reference direction is magnetic north, it is difficult to determine the first and second angles in an area having, for example, buried electric cables.
De manière avantageuse, la centrale inertielle est associée à une boussole bidimensionnelle ou, préférentiellement, à une boussole tridimensionnelle. Cette association permet d'utiliser une centrale inertielle moins performante. Cette centrale inertielle est calibrée initialement et recalibrée périodiquement au moyen de la boussole. De cette manière, le skieur n'a pas à effectuer de procédure initiale de calibration de la centrale inertielle et le calcul de l'écart angulaire entre les skis est fiable sur une grande période de temps. Advantageously, the inertial unit is associated with a two-dimensional compass or, preferably, with a three-dimensional compass. This association makes it possible to use a less efficient inertial unit. This inertial unit is calibrated initially and recalibrated periodically by means of the compass. In this way, the skier does not have to perform initial calibration procedure of the inertial unit and the calculation of the angular difference between the skis is reliable over a long period of time.
Avantageusement, le circuit de commande 2 est configuré pour recalibrer les centrales inertielles périodiquement et pour éviter l'utilisation de la boussole lorsque le ski est fortement déplacé ce qui fausse la mesure ou, dans le cas où une boussole bidimensionnelle est utilisée, lorsque la position du ski est trop peu parallèle au plan normal de la terre. Advantageously, the control circuit 2 is configured to recalibrate the inertial units periodically and to avoid the use of the compass when the ski is heavily displaced which distorts the measurement or, in the case where a two-dimensional compass is used, when the position skiing is too little parallel to the normal plane of the earth.
Selon un mode de réalisation préféré, le circuit de commande 2 est constitué d'un ensemble de systèmes micromécaniques (MEMs) ce qui permet de réduire la consommation électrique du dispositif. According to a preferred embodiment, the control circuit 2 consists of a set of micromechanical systems (MEMs) which reduces the power consumption of the device.
Selon un mode de réalisation particulièrement avantageux, le circuit de commande 2 est configuré pour comprendre un « mode apprentissage ». Un tel mode permet un calibrage du circuit de commande 2 sur la ou les premières descentes effectuées par le skieur. Ainsi, lors de la ou des premières descentes, le dispositif de fixation sécurisé est partiellement activé dans le sens ou le dispositif de commande 2 est uniquement configuré pour déterminer les paramètres seuil (par exemple seuil d'accélération angulaire et/ou d'accélération ou décélération linéaire du ski au-delà duquel le circuit de commande 2 doit émettre un signal de désolidarisation) liés aux caractéristiques propres du skieur, notamment à son niveau de compétence, mais n'émet aucun signal de solidarisation. Lors d'un tel mode d'apprentissage, l'utilisateur est toujours protégé mais de manière moins efficace, par exemple comme dans l'art antérieur. Avantageusement, le dispositif de fixation peut être précalibré avant la première descente en mode apprentissage. Dans ce cas, l'utilisateur indiquera ses caractéristiques propres, par exemple son poids et/ou son niveau de compétence sur une échelle de niveau réduite (par exemple, « débutant » / « moyen » / « confirmé ») qui seront intégrées par le circuit de commande 2. Le dispositif de fixation fonctionnera alors, lors de la première descente, selon les paramètres indiqués initialement par l'utilisateur tout en déterminant, toujours lors de cette première descente, les paramètres seuil réels (par exemple seuil d'accélération angulaire et/ou d'accélération ou décélération linéaire du ski au-delà duquel le circuit de commande 2 doit émettre un signal de désolidarisation) liés au niveau de compétence de l'utilisateur. Préférentiellement, le mode apprentissage peut être réitéré autant de fois que nécessaire notamment si le skieur a chuté lors de la première descente. Le mode apprentissage peut également être progressif, le skieur effectuant tout d'abord une première descente sur une piste bleue, puis une seconde sur une piste rouge, etc. Un tel mode de réalisation est particulièrement intéressant notamment parce qu'il est régulièrement constaté une surestimation par l'utilisateur de son propre niveau de compétence. According to a particularly advantageous embodiment, the control circuit 2 is configured to include a "learning mode". Such a mode allows a calibration of the control circuit 2 on the first or descents made by the skier. Thus, during the first or several descents, the fastening device is partially activated in the direction where the control device 2 is only configured to determine the threshold parameters (for example threshold of angular acceleration and / or linear acceleration or deceleration of the ski beyond which the control circuit 2 must emit a decoupling signal) related to the specific characteristics of the skier, in particular at his skill level, but does not emit any signal of solidarity. In such a learning mode, the user is always protected but less effectively, for example as in the prior art. Advantageously, the fixing device can be precalibrated before the first descent in learning mode. In this case, the user will indicate his own characteristics, for example his weight and / or his level of competence on a reduced level scale (for example, "beginner" / "average" / "confirmed") which will be integrated by the control circuit 2. The fixing device will then operate, during the first descent, according to the parameters initially indicated by the user while determining, still during this first descent, the actual threshold parameters (for example threshold of angular acceleration and / or linear acceleration or deceleration of the ski beyond which the control circuit 2 must emit a decoupling signal) related to the skill level of the user. Preferably, the learning mode can be reiterated as many times as necessary, especially if the skier has dropped during the first descent. The learning mode can also be progressive, the skier first making a first descent on a blue track, then a second on a red track, etc. Such an embodiment is particularly interesting in particular because there is regularly an overestimation by the user of his own level of competence.
Le dispositif de fixation sécurisée permet de prévenir les risques de lésion pour le skieur tout en lui permettant de skier sans déchausser de façon inopportune. A titre d'exemple, une position des skis de type chasse neige vers l'arrière (rapprochement des extrémités arrières et écartement des pointes avant des deux skis) n'entraînera pas de désolidarisation entre la chaussure et le ski si le skieur se déplace vers l'arrière. Le dispositif de fixation permet donc une pratique du ski sans risque de blessure et sans que les chaussures ne déchaussent lorsque la situation n'est pas une situation à risque. Le dispositif permet entre outre de pouvoir être associé à une fixation conventionnelle comportant un système sécurisé purement mécanique. Le dispositif prend donc en compte, pour évaluer les situations à risque, de nombreux paramètres tels que la position relative des skis entre eux, le sens de déplacement, la vitesse, le poids du skieur, son niveau de compétence, etc. The secure fastening device prevents the risk of injury to the skier while allowing him to ski without removing shoes inappropriately. For example, a position of the snow-type skis backwards (approaching the rear ends and spacing of the front ends of the two skis) will not cause separation between the shoe and the ski if the skier moves towards the rear. The fastening device thus allows skiing without risk of injury and without shoes shoes off when the situation is not a risk situation. The device further allows to be associated with a conventional fixing comprising a purely mechanical secure system. The device thus takes into account, in order to evaluate risk situations, numerous parameters such as the relative position of the skis with each other, the direction of movement, the speed, the weight of the skier, his skill level, etc.

Claims

Revendications claims
1. Dispositif de fixation sécurisée d'une chaussure sur un premier ski comprenant : un organe de fixation (1 ) de la chaussure sur le premier ski configuré pour faciliter la désolidarisation entre la chaussure et le premier ski à réception d'un signal de désolidarisation, 1. Apparatus for securely fastening a boot to a first ski comprising: a fastener (1) for the boot on the first ski configured to facilitate the separation between the boot and the first ski on receiving a decoupling signal ,
un circuit de commande (2) configuré pour :  a control circuit (2) configured to:
• déterminer un écart angulaire entre une première direction du premier ski et une deuxième direction d'un deuxième ski,  Determining an angular difference between a first direction of the first ski and a second direction of a second ski,
• déterminer la progression vers l'avant des premier et deuxième skis selon l'axe longitudinal de chacun desdits skis,  Determining the forward progression of the first and second skis along the longitudinal axis of each of said skis,
• calculer au moins un paramètre à partir de l'écart angulaire et des progressions vers l'avant des premier et deuxième skis, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison.  Calculating at least one parameter from the angular deviation and forward progressions of the first and second skis, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
2. Dispositif selon la revendication 1 , caractérisé en ce que le circuit de commande (2) est configuré pour : Device according to claim 1, characterized in that the control circuit (2) is configured to:
• déterminer un écart angulaire entre une première direction du premier ski et une deuxième direction d'un deuxième ski,  Determining an angular difference between a first direction of the first ski and a second direction of a second ski,
• déterminer la première direction de progression du premier ski et la deuxième direction de progression du deuxième ski,  Determine the first direction of progression of the first ski and the second direction of progression of the second ski,
• calculer au moins un paramètre à partir de l'écart angulaire, de la première direction de progression et de la deuxième direction de progression, comparer le paramètre à un paramètre seuil, et émettre le signal de désolidarisation en fonction de la comparaison.  Calculating at least one parameter from the angular deviation, the first progression direction and the second progression direction, comparing the parameter with a threshold parameter, and transmitting the uncoupling signal according to the comparison.
3. Dispositif selon l'une ou l'autre des revendications 1 ou 2, caractérisé en ce que le circuit de commande (2) est configuré pour : 3. Device according to either of claims 1 or 2, characterized in that the control circuit (2) is configured to:
• déterminer un premier angle entre la première direction du premier ski et une première direction de référence fixe,  Determining a first angle between the first direction of the first ski and a first fixed reference direction,
• déterminer un deuxième angle entre la deuxième direction du deuxième ski et une deuxième direction de référence fixe,  Determining a second angle between the second direction of the second ski and a second fixed reference direction,
• calculer au moins un paramètre à partir du premier angle, du deuxième angle, de la première direction de progression et de la deuxième direction de progression. • calculate at least one parameter from the first angle, from the second angle, the first direction of progression and the second direction of progression.
4. Dispositif selon la revendication 3, caractérisé en ce que la première et la deuxième directions de référence correspondent au nord magnétique. 4. Device according to claim 3, characterized in that the first and second reference directions correspond to magnetic north.
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le circuit de commande (2) est configuré pour évaluer la vitesse de déplacement du premier ski. 5. Device according to any one of the preceding claims, characterized in that the control circuit (2) is configured to evaluate the speed of movement of the first ski.
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le circuit de commande (2) comprend en outre au moins un gyroscope et/ou au moins un accéléromètre. 6. Device according to any one of the preceding claims, characterized in that the control circuit (2) further comprises at least one gyroscope and / or at least one accelerometer.
7. Dispositif selon la revendication 6, caractérisé en ce que le circuit de commande (2) comprend au moins une centrale inertielle et, éventuellement, une boussole. 7. Device according to claim 6, characterized in that the control circuit (2) comprises at least one inertial unit and, optionally, a compass.
8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le circuit de commande (2) de chaque ski comprend un capteur et un circuit de calcul configuré pour calculer le ou les paramètres. 8. Device according to any one of the preceding claims, characterized in that the control circuit (2) of each ski comprises a sensor and a calculation circuit configured to calculate the parameter or parameters.
9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une lame piézoélectrique (4) configurée pour s'intégrer dans le ski et en ce que le circuit de commande (2) est configuré pour discriminer un glissement du ski et un autre déplacement du ski en contrôlant la puissance électrique générée par la lame piézoélectrique (4). 9. Device according to any one of the preceding claims, characterized in that it comprises a piezoelectric blade (4) configured to integrate into the ski and in that the control circuit (2) is configured to discriminate a slip. ski and another ski displacement by controlling the electric power generated by the piezoelectric blade (4).
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la lame piézoélectrique (4) est configurée pour alimenter l'intégralité du dispositif de fixation sécurisée. 10. Device according to any one of the preceding claims, characterized in that the piezoelectric blade (4) is configured to supply the entire secure fastening device.
11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'organe de fixation (1 ) comprend une butée avant, une talonnière et au moins une platine pivotante (3) placée: 11. Device according to any one of the preceding claims, characterized in that the fixing member (1) comprises a front stop, a heel and at least one pivoting plate (3) placed:
entre la butée avant et le ski et/ou  between the front stop and the ski and / or
- entre la talonnière et le ski. - between the heel and the ski.
12. Dispositif selon la revendication 1 1 , caractérisé en ce que la platine pivotante (3) est configurée pour être bloquée en cas d'absence de signal de désolidarisation. 12. Device according to claim 1 1, characterized in that the pivoting plate (3) is configured to be blocked in the absence of a disconnection signal.
13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte un premier circuit de commande configuré pour être associé à un ski droit et une deuxième circuit de commande configuré pour être associé à un ski gauche. 13. Device according to any one of the preceding claims, characterized in that it comprises a first control circuit configured to be associated with a straight ski and a second control circuit configured to be associated with a left ski.
14. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le circuit de commande (2) est configuré pour déterminer quel ski est le ski droit et quel ski est le ski gauche par rapport à la chaussure avec laquelle est associé chaque ski. 14. Device according to any one of the preceding claims, characterized in that the control circuit (2) is configured to determine which ski is the right ski and which ski is the left ski relative to the shoe with which is associated each ski.
EP13818762.0A 2013-02-11 2013-12-10 Secure attachment of a shoe on a ski Not-in-force EP2953694B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1300294A FR3001898B1 (en) 2013-02-11 2013-02-11 SECURE ATTACHMENT OF SHOE ON A SKI
PCT/FR2013/000329 WO2014122366A1 (en) 2013-02-11 2013-12-10 Secure attachment of a shoe on a ski

Publications (2)

Publication Number Publication Date
EP2953694A1 true EP2953694A1 (en) 2015-12-16
EP2953694B1 EP2953694B1 (en) 2017-04-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13818762.0A Not-in-force EP2953694B1 (en) 2013-02-11 2013-12-10 Secure attachment of a shoe on a ski

Country Status (5)

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US (1) US20160001163A1 (en)
EP (1) EP2953694B1 (en)
JP (1) JP2016506808A (en)
FR (1) FR3001898B1 (en)
WO (1) WO2014122366A1 (en)

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Also Published As

Publication number Publication date
WO2014122366A1 (en) 2014-08-14
JP2016506808A (en) 2016-03-07
EP2953694B1 (en) 2017-04-19
FR3001898B1 (en) 2015-04-03
US20160001163A1 (en) 2016-01-07
FR3001898A1 (en) 2014-08-15

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