EP2899343B1 - Anti-remanence device for electromagnetic lock - Google Patents
Anti-remanence device for electromagnetic lock Download PDFInfo
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- EP2899343B1 EP2899343B1 EP15152125.9A EP15152125A EP2899343B1 EP 2899343 B1 EP2899343 B1 EP 2899343B1 EP 15152125 A EP15152125 A EP 15152125A EP 2899343 B1 EP2899343 B1 EP 2899343B1
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- coil
- voltage
- electromagnetic
- pulse
- current
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- 230000005672 electromagnetic field Effects 0.000 claims 1
- 230000005291 magnetic effect Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 230000005415 magnetization Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 239000011120 plywood Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 2,8-bis(diphenylphosphoryl)dibenzothiophene Chemical compound C=1C=CC=CC=1P(C=1C=C2C3=CC(=CC=C3SC2=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
- E05C17/56—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by magnetic or electromagnetic attraction or operated by electric or electromagnetic means
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
- E05C19/16—Devices holding the wing by magnetic or electromagnetic attraction
- E05C19/166—Devices holding the wing by magnetic or electromagnetic attraction electromagnetic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
- E05B2047/0048—Circuits, feeding, monitoring
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/11—Magnetic
Definitions
- the present invention relates to an electromagnetic lock device for controlling the opening / closing of an opening adapted to a frame of a frame, in particular a door.
- This type of device conventionally comprises an electromagnetic suction cup comprising an electromagnet, generally in the shape of a parallelepiped, in particular rectangle, or prismatic, received in a section in two parts, each part consisting of a U-shaped section, the two sections U-shaped interlocking one within the other receiving the electromagnet within them and secondly a counterplate of a material capable of being attracted by a magnet, in particular a ferromagnetic material, for example a metallic material.
- the counterplate is received in a strip section mounted along the free edge of the door, typically a door, while the electromagnetic lock is received in the frame, typically the door frame.
- the reverse arrangement is also possible.
- the devices of the prior art have provided to insert an anti-remanent electric circuit to send in the coil of the electromagnet an electric current in the opposite direction of the electric current magnetization.
- These devices of the prior art are complex in structure and expensive to manufacture.
- they comprise complex electronic components, such as relays, in particular bistable or of the DPDT type, transistors, or the like.
- These devices moreover, are unreliable and often fail, particularly in the case of use for a door system intended to have a high cycle of use, for example in the case of access door to public places.
- these anti-remanent electrical circuits of the prior art only work in one direction of the polarity of the current source, complicating their implementation in the door system.
- an anti-remanent device which consists of a lug received in a blind hole formed on the surface of the plywood for example and which projects from the hole by being movably mounted so as to be pushed by a spring disposed at the bottom. of the blind hole and which tends to push the lug out of the hole.
- the spur despite the spring, is pushed completely inside the hole.
- the magnetic field is deactivated, there remains a remanent electromagnetic force which is less than the magnetic force in the activated state, and in particular which is lower than the spring biasing force on the pin, the stiffness constant of the spring having been previously selected in this goal. It follows that the lug emerges from the hole and spreads the suction cup, which allows the opening of the door by the user, the remanent electromagnetic force having been overcome by the action of the lug pushed by the spring.
- the present invention aims to overcome the disadvantages of the prior art by proposing a device of the above kind which is simpler and more reliable structure.
- an electromagnetic lock device is as defined in claim 1.
- the energy of the cut-off voltage which is necessarily created when the power supply is cut off in the form of a negative voltage pulse is thus used by damping it on its return to the zero-volt level. to return a current in the coil to fight against the lingering effect.
- DPDT relays Double Poles, Double Lanes
- the use of the pulse current sent into the coil during the breaking ensures a curve giving the intensity of the current in the coil as a function of time which remains continuous, ie without sudden jump or discontinuity that may cause damage to the device.
- means are provided for limiting the maximum absolute value of the cut-off voltage pulse, in particular means in the form of a varistor mounted across the at least one coil.
- the means for limiting the maximum absolute value limit the absolute value of the maximum voltage to a value greater than the supply voltage.
- the electrical circuit is arranged so that the voltage, after having passed once the zero back of the peak of the cut-off pulse, possibly damped by the limiting means, in particular the varistor, oscillates around zero while being damped. , in particular by becoming substantially zero after one or two pulse periods.
- the arrangement is such that the device operates even if the polarity of the current source is reversed.
- the electrical circuit comprises at least one unpolarized capacitor and a series resistor connected in parallel across the at least one coil of the electromagnet.
- the electric circuit comprises a circuit consisting of two series-connected polarized capacitors mounted in parallel to the terminals of the at least one coil of the electro magnet.
- the present invention also relates to a door device comprising an opening and a frame and an electromagnetic lock device according to the invention, one of the two elements of the electromagnetic lock device, namely the electromagnetic lock and the counter plate, being attached to the opening, while the other of the two elements is fixed to the frame.
- the present invention also relates to a module forming anti-remanence device for an electromagnetic lock intended to be integrated in an electromagnetic lock and in particular in the electrical or electronic control circuit of the electromagnetic lock, the module comprising an electric circuit arranged so that the power supply source is mounted directly across the at least one coil so that when the interrupting means cuts off the power supply, a breaking voltage in the form of a pulse is applied to the coil and the electric circuit comprises means for delaying the zero crossing in return of the pulse, in particular of a duration at least equal to 40 thousandths of a second (ms), preferably at least 100 ms, even more preferably greater than 150 ms, for example between 100 ms and 300 ms.
- ms millimeters
- the electrical circuit of the module comprises two capacitors polarized in series, in particular mounted head to tail.
- the electrical circuit of the module comprises an unpolarized capacitor and a series resistor.
- an access opening / closing system comprising an opening, for example a door P, which, depending on its position, closes a door opening delimited by a frame, for example a frame D, or on the contrary, lets access.
- the opening / closing of the door is controlled by an electromagnetic lock, comprising two elements, an electromagnetic suction cup and a counterplate 1.
- the electromagnetic suction cup comprises two U-shaped profiles, nested one inside the other so as to define a closed enclosure inside which is housed an electromagnet 4 intended to create a magnetic field to attract the counterplate 1 against the electromagnetic lock with a force greater than at least the maximum force that a human is able to provide to open the door .
- an electrical control circuit of the electromagnet for example mounted on an electronic card.
- the electrical or electronic circuit comprises a power supply, for example in the form of a battery 2 which, depending on the applications, may have a value Vo which can be between 8 and 64 volts, for example 12 V, 24 V or 48 V , intended to pass in a coil L of inductance of the electromagnet a magnetization current.
- a power supply for example in the form of a battery 2 which, depending on the applications, may have a value Vo which can be between 8 and 64 volts, for example 12 V, 24 V or 48 V , intended to pass in a coil L of inductance of the electromagnet a magnetization current.
- This range of voltage and these voltage values are, however, given by way of example, and other larger values of the voltage may be provided without departing from the scope of the invention.
- the electromagnet is described as having a single inductance coil. However, this is only for the purpose of simplifying the description, and it goes without saying that one can either provide several coils forming an equivalent coil which can then be considered as being said at least one coil of the electromagnet, or provide several coils and consider only one under the said at least one coil.
- a switch 10 allows the circuit break.
- the switch 10 is connected to a control button of the opening of the door.
- a circuit module 22 consisting of two polarized capacitors 20 and 21 connected in series head to tail, is connected in parallel across the inductance L of the electromagnet.
- This module 22 circuit has the function, when the current flowing in the coil is cut by the opening of the switch 10, in a first step to take the energy of the cutoff voltage pulse created by the opening of the switch by charging one of the two capacitors, and discharging the other capacitor to send a current in the coil in the opposite direction of the current flowing in the coil before opening the switch, to cancel or overcome the field magnetic remanent.
- the door When the switch 10 is closed, the door is normally closed and an electric current passes through the coil, which creates a magnetic field. This magnetic field attracts the counterplate in a ferromagnetic material, for example metal, against the sucker and prevents the opening of the door.
- a ferromagnetic material for example metal
- a user When a user comes to open the door, he can for example press a button (possibly after typing an access code) or introduce a smart card or the like to activate a circuit that is connected to the switch. so that the actuation of the button causes the opening of the switch.
- the magnetization current supply by the battery 2 is then cut off. Switching off the power supply by opening the switch creates a cut-off voltage pulse having a value equal to -Vm (see FIG. figure 3 ).
- a varistor V has been mounted across the coil and the module 22 to limit the absolute value Vm of the maximum voltage of the cut-off pulse. However, Vm is limited to a value greater than V0 (as shown in FIG. figure 3 ).
- the capacitors 20 and 21 then perform a charge-discharge cycle which creates a negative transient current in the coil.
- This transient current which typically only lasts a few milliseconds, has the effect of canceling or greatly reducing the remanent magnetic field.
- the user can open the door without having to overcome the electromagnetic force resulting from the remanent magnetic field.
- the two capacitors reverse their respective polarities and are available immediately for a new cycle.
- the current flowing in the coil is 500mA, 250mA and 125mA.
- the internal resistance of the power supply may for example be respectively 25, 100, 400 Ohms, without the invention being limited in any way to this value.
- the two capacitors which may be in particular capacitors of the Jamicon brand, have for example a capacity of 1000 microfarads for a nominal voltage of 25V, without the invention being limited in any way to this value.
- resistor R in the circuit 22. It can be provided to add a resistor R in the circuit 22. however, it is an optional feature. In addition, it is preferable not to place it between the two capacitors 20 and 21.
- the characteristic value of the inductor is for example equal to 2800H / 24Volts, without the invention being limited in any way whatsoever to this value.
- This curve is continuous, that is to say that it does not include discontinuity such as sudden jumps, from the switch off to to.
- Varistor V limits the value Vm.
- modules 22 or 22 "to figures 2 and4, respectively, has the effect of slowing down the rise of the curve (with respect to a conventional cut-off voltage pulse) so that the voltage becomes zero again for the first time only after a time interval ⁇ To which is at least 40 ms, preferably at least 100 ms, still more preferably at least 150 ms, in particular between 120 ms and 300 ms. A current has thus been created in the coil sufficient to cancel the residual magnetism or remanence.
- the electrical circuit (especially in the case where it comprises one of the modules 22 or 22 ") is such that the voltage returns to the value -Vo after a time interval ⁇ to greater than 40ms, especially greater than 70ms.
- the voltage is sinusoidally amortized around zero.
- the half oscillation period ( ⁇ t1- ⁇ To at the figure 3 ) is of the order of 100ms. At the end of a period of oscillation, the voltage is almost zero.
- FIG. 4 there is shown a diagram of another electrical circuit, including electronic control of the current flowing in the coil of the electromagnet.
- a current source is used in the form of a battery 2, with a nominal voltage of for example 12V, 24V or 48V.
- the current flowing in the coil is 500mA, 250mA and 125mA.
- the internal resistance of the power supply may for example be respectively 25, 100, 400 Ohms, without the invention being limited in any way to this value.
- the characteristic value of the inductor is for example equal to 2800H / 24Volts, without the invention being limited in any way whatsoever to this value.
- circuit module 22 in the form of a non-polarized capacitor 34 and a resistor R 'connected in series is mounted across the inductor in parallel with the latter.
- This module 22 circuit has the function, when the current flowing in the coil is cut by the opening of the switch 10, in a first step to take the energy of the cutoff voltage pulse created by the opening of the switch by charging one of the two capacitors, and discharging the other capacitor to send a current in the coil in the opposite direction of the current flowing in the coil before opening the switch, to cancel or overcome the field magnetic remanent.
- the capacitor 34 and the resistor R 'can for example and without the invention being limited to these values, have the characteristic values respectively of 25V / 1000 ⁇ F and 100 Ohms.
- the curve giving the intensity passing through the coil L from a few moments before the opening of the switch is of identical shape to that shown in FIG. figure 3 for the circuit of the figure 2 and has the same characteristics.
- the intensity decreases along a slope such that the current becomes zero after a time interval of a few thousandths of a second.
- the intensity has been canceled, all the energy of the coil has been recovered by the module 22 "and the capacitor 34 discharges through the resistor R 'until the current reaches the lowest point of the curve.
- the remanence is then erased and the door opens without difficulty.Then the same cycle as above starts again, but strongly damped, during a few oscillations, before final extinction of the current.
- the embodiment described provides for fixing the plywood to the opening and the suction cup to the frame.
- the reverse can be provided.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
- Lock And Its Accessories (AREA)
Description
La présente invention se rapporte à un dispositif formant serrure électromagnétique pour commander l'ouverture/fermeture d'un ouvrant adapté à un encadrement d'un dormant, notamment une porte.The present invention relates to an electromagnetic lock device for controlling the opening / closing of an opening adapted to a frame of a frame, in particular a door.
Ce genre de dispositif comporte de manière classique une ventouse électromagnétique comportant un électroaimant, en général en forme de parallélépipède, notamment rectangle, ou prismatique, reçu dans un profilé en deux parties, chaque partie étant constituée d'un profilé en U, les deux profilés en U s'emboîtant l'un dans l'autre en recevant en leur sein l'électroaimant et d'autre part une contreplaque en un matériau susceptible d'être attiré par un aimant, notamment un matériau ferromagnétique, par exemple un matériau métallique.This type of device conventionally comprises an electromagnetic suction cup comprising an electromagnet, generally in the shape of a parallelepiped, in particular rectangle, or prismatic, received in a section in two parts, each part consisting of a U-shaped section, the two sections U-shaped interlocking one within the other receiving the electromagnet within them and secondly a counterplate of a material capable of being attracted by a magnet, in particular a ferromagnetic material, for example a metallic material.
En général, la contreplaque est reçue dans un profilé bandeau monté le long du bord libre de l'ouvrant, classiquement une porte, tandis que la ventouse électromagnétique est reçue dans le dormant, classiquement le cadre de la porte. Cependant, la disposition inverse est également possible.In general, the counterplate is received in a strip section mounted along the free edge of the door, typically a door, while the electromagnetic lock is received in the frame, typically the door frame. However, the reverse arrangement is also possible.
Ces dispositifs formant serrure électromagnétique ont comme inconvénient en particulier de présenter un effet de rémanence, à savoir que lorsque la serrure électromagnétique est désactivée, par exemple par l'appui sur le bouton d'ouverture, l'action magnétique tendant à maintenir la porte fermée par attraction magnétique de la contreplaque sur la ventouse, l'utilisateur ne parvient pas pour autant à ouvrir la porte sans avoir à appliquer une force assez importante correspondant à la force nécessaire pour surmonter la force magnétique liée au champ magnétique rémanent, c'est-à-dire le champ magnétique qui se maintient malgré l'annulation de la cause l'ayant créé, à savoir le courant d'activation.These devices forming an electromagnetic lock have the disadvantage in particular of having a remanence effect, namely that when the electromagnetic lock is deactivated, for example by pressing the opening button, the magnetic action tending to keep the door closed by magnetic attraction of the plywood on the suction cup, the user does not succeed in opening the door without having to apply a large enough force corresponding to the force required to overcome the magnetic force related to the remanent magnetic field, that is to say the magnetic field that is maintained despite the cancellation of the cause that created it, namely the activation current.
Pour résoudre ce problème, les dispositifs de l'art antérieur ont prévu d'insérer un circuit électrique anti-rémanent pour envoyer dans la bobine de l'électroaimant un courant électrique dans le sens inverse du courant électrique d'aimantation.To solve this problem, the devices of the prior art have provided to insert an anti-remanent electric circuit to send in the coil of the electromagnet an electric current in the opposite direction of the electric current magnetization.
Ces dispositifs de l'art antérieur sont de structure complexe et coûteux à fabriquer. En particulier ils comportent des composants électroniques complexes, tels que des relais, notamment bistables ou de type DPDT, des transistors, ou analogues. Ces dispositifs qui plus est sont peu fiables et tombent souvent en panne, en particulier dans le cas d'une utilisation pour un système de porte destiné à avoir un cycle d'utilisation élevé, par exemple dans le cas de porte d'accès à des lieux publics. En outre, ces circuits électriques anti-rémanent de l'art antérieur ne fonctionnent que dans un seul sens de la polarité de la source de courant, compliquant leur mise en oeuvre dans le système de porte.These devices of the prior art are complex in structure and expensive to manufacture. In particular, they comprise complex electronic components, such as relays, in particular bistable or of the DPDT type, transistors, or the like. These devices, moreover, are unreliable and often fail, particularly in the case of use for a door system intended to have a high cycle of use, for example in the case of access door to public places. In addition, these anti-remanent electrical circuits of the prior art only work in one direction of the polarity of the current source, complicating their implementation in the door system.
Des solutions mécaniques ont également été proposées. Il y est prévu un dispositif anti-rémanent qui consiste en un ergot reçu dans un trou borgne formé à la surface de la contreplaque par exemple et qui fait saillie du trou en y étant monté mobile de manière à être poussé par un ressort disposé au fond du trou borgne et qui tend à pousser l'ergot hors du trou. Lorsque la contreplaque et la ventouse viennent en contact mutuel sous l'effet de la force électromagnétique de fermeture de la serrure, l'ergot, malgré le ressort, est repoussé complètement à l'intérieur du trou. Lorsque le champ magnétique est désactivé, il subsiste une force électromagnétique rémanente qui est moindre que la force magnétique à l'état activé, et en particulier qui est inférieure à la force de poussée du ressort sur l'ergot, la constante de raideur du ressort ayant été préalablement choisie dans ce but. Il s'ensuit que l'ergot ressort du trou et écarte la ventouse, ce qui permet l'ouverture de la porte par l'utilisateur, la force électromagnétique rémanente ayant été surmontée par l'action de l'ergot poussé par le ressort.Mechanical solutions have also been proposed. There is provided an anti-remanent device which consists of a lug received in a blind hole formed on the surface of the plywood for example and which projects from the hole by being movably mounted so as to be pushed by a spring disposed at the bottom. of the blind hole and which tends to push the lug out of the hole. When the plywood and the plunger come into mutual contact under the effect of the electromagnetic closing force of the lock, the spur, despite the spring, is pushed completely inside the hole. When the magnetic field is deactivated, there remains a remanent electromagnetic force which is less than the magnetic force in the activated state, and in particular which is lower than the spring biasing force on the pin, the stiffness constant of the spring having been previously selected in this goal. It follows that the lug emerges from the hole and spreads the suction cup, which allows the opening of the door by the user, the remanent electromagnetic force having been overcome by the action of the lug pushed by the spring.
Ces dispositifs de l'art antérieur sont compliqués à fabriquer. En outre, en raison de l'usure notamment sous l'effet de la corrosion, ils présentent une durée de vie limitée. Qui plus est, l'action de poussée de l'ergot dans le trou par la force électromagnétique à l'état activé diminue d'autant la force magnétique disponible pour plaquer les deux éléments de la serrure électromagnétique l'un contre l'autre.These devices of the prior art are complicated to manufacture. In addition, due to the wear especially under the effect of corrosion, they have a limited life. Moreover, the pushing action of the pin in the hole by the electromagnetic force in the activated state decreases by the magnetic force available to press the two elements of the electromagnetic lock against each other.
De
La présente invention vise à surmonter les inconvénients de l'art antérieur en proposant un dispositif du genre ci dessus qui soit de structure plus simple et plus fiable.The present invention aims to overcome the disadvantages of the prior art by proposing a device of the above kind which is simpler and more reliable structure.
Suivant l'invention, un dispositif formant serrure électromagnétique est tel que défini à la revendication 1.According to the invention, an electromagnetic lock device is as defined in
Suivant l'invention, On utilise ainsi l'énergie de la tension de coupure qui se crée nécessairement à la coupure de l'alimentation sous la forme d'une impulsion de tension négative en l'amortissant lors de son retour vers le niveau zéro Volt pour renvoyer un courant dans la bobine pour lutter contre l'effet rémanent. On obtient ainsi un système de structure simple et fiable. En particulier, il n'est plus nécessaire, comme c'était le cas dans les dispositifs de l'art antérieur, d'utiliser des composants électroniques compliqués, tels que des relais DPDT (Double Pôles, Double Voies) pour réaliser une inversion de polarité aux bornes de la bobine afin d'y envoyer un courant dans le sens inverse. On évite ainsi la formation notamment d'étincelles (lors du passage brusque des relais d'une position ouverte à l'autre position fermée) susceptible de détériorer le dispositif, notamment dans le cas d'un cycle d'utilisation élevé. En outre, l'utilisation du courant d'impulsion envoyé dans la bobine lors de la coupure permet d'assurer une courbe donnant l'intensité du courant dans la bobine en fonction du temps qui reste continue, c'est à dire sans saut brusque ou discontinuité pouvant entraîner une détériorations du dispositif.
De préférence, il est prévu des moyens pour limiter la valeur absolue maximale de l'impulsion de tension de coupure, notamment des moyens sous la forme d'une varistance montée aux bornes de la au moins une bobine.According to the invention, the energy of the cut-off voltage which is necessarily created when the power supply is cut off in the form of a negative voltage pulse is thus used by damping it on its return to the zero-volt level. to return a current in the coil to fight against the lingering effect. This gives a simple and reliable structure system. In particular, it is no longer necessary, as was the case in the devices of the prior art, to use complicated electronic components, such as DPDT relays (Double Poles, Double Lanes) to perform a reverse inversion. polarity across the coil to send a current in the opposite direction. This avoids the formation of particular sparks (during the sudden passage of relays from an open position to the other closed position) likely to deteriorate the device, especially in the case of a high duty cycle. In addition, the use of the pulse current sent into the coil during the breaking ensures a curve giving the intensity of the current in the coil as a function of time which remains continuous, ie without sudden jump or discontinuity that may cause damage to the device.
Preferably, means are provided for limiting the maximum absolute value of the cut-off voltage pulse, in particular means in the form of a varistor mounted across the at least one coil.
Suivant l'invention, cependant, les moyens pour limiter la valeur absolue maximale limitent la valeur absolue de la tension maximale à une valeur supérieure à la tension d'alimentation.
De préférence, le circuit électrique est agencé pour que la tension, après avoir passé une fois le zéro en retour du pic de l'impulsion de coupure, éventuellement amortie par les moyens de limitation, notamment la varistance, oscille autour de zéro en étant amortie, notamment en devenant sensiblement nulle après une ou deux périodes d'impulsion.
De préférence, l'agencement est tel que le dispositif fonctionne même si l'on inverse la polarité de la source de courant.
De préférence, le circuit électrique comporte au moins un condensateur non polarisé et une résistance en série, monté en parallèle aux bornes de la au moins une bobine de l'électroaimant.According to the invention, however, the means for limiting the maximum absolute value limit the absolute value of the maximum voltage to a value greater than the supply voltage.
Preferably, the electrical circuit is arranged so that the voltage, after having passed once the zero back of the peak of the cut-off pulse, possibly damped by the limiting means, in particular the varistor, oscillates around zero while being damped. , in particular by becoming substantially zero after one or two pulse periods.
Preferably, the arrangement is such that the device operates even if the polarity of the current source is reversed.
Preferably, the electrical circuit comprises at least one unpolarized capacitor and a series resistor connected in parallel across the at least one coil of the electromagnet.
Suivant un mode de réalisation particulièrement avantageux, notamment par sa simplicité de conception et sa fiabilité, le circuit électrique comporte un circuit constitué de deux condensateurs polarisés en série montés tête-bêche, monté en parallèle aux bornes de la au moins une bobine de l'électroaimant.According to a particularly advantageous embodiment, in particular by its simplicity of design and its reliability, the electric circuit comprises a circuit consisting of two series-connected polarized capacitors mounted in parallel to the terminals of the at least one coil of the electro magnet.
La présente invention se rapporte également à un dispositif formant porte comportant un ouvrant et un dormant et un dispositif formant serrure électromagnétique suivant l'invention, l'un des deux éléments du dispositif formant serrure électromagnétique, à savoir la ventouse électromagnétique et la contreplaque, étant fixé à l'ouvrant, tandis que l'autre des deux éléments est fixé au dormant.The present invention also relates to a door device comprising an opening and a frame and an electromagnetic lock device according to the invention, one of the two elements of the electromagnetic lock device, namely the electromagnetic lock and the counter plate, being attached to the opening, while the other of the two elements is fixed to the frame.
La présente invention se rapporte également à un module formant dispositif d'anti-rémanence pour une serrure électromagnétique destiné à être intégré dans une serrure électromagnétique et notamment dans le circuit électrique ou électronique de commande de la serrure électromagnétique, le module comportant un circuit électrique agencé de sorte que la source d'alimentation en courant est montée directement aux bornes de la au moins une bobine de sorte que, lorsque les moyens d'interruption coupe l'alimentation en courant, une tension de coupure sous la forme d'une impulsion est appliquée à la bobine et le circuit électrique comporte des moyens pour retarder le passage à zéro en retour de l'impulsion, notamment d'une durée au moins égale à 40 millièmes de seconde (ms), de préférence au moins égale à 100 ms, encore plus préférablement supérieure à 150 ms, par exemple comprise entre 100 ms et 300 ms.The present invention also relates to a module forming anti-remanence device for an electromagnetic lock intended to be integrated in an electromagnetic lock and in particular in the electrical or electronic control circuit of the electromagnetic lock, the module comprising an electric circuit arranged so that the power supply source is mounted directly across the at least one coil so that when the interrupting means cuts off the power supply, a breaking voltage in the form of a pulse is applied to the coil and the electric circuit comprises means for delaying the zero crossing in return of the pulse, in particular of a duration at least equal to 40 thousandths of a second (ms), preferably at least 100 ms, even more preferably greater than 150 ms, for example between 100 ms and 300 ms.
Suivant un mode de réalisation particulièrement avantageux, notamment par sa simplicité de conception et sa fiabilité, le circuit électrique du module comporte deux condensateurs polarisés en série, notamment montés tête-bêche.According to a particularly advantageous embodiment, in particular by its simplicity of design and its reliability, the electrical circuit of the module comprises two capacitors polarized in series, in particular mounted head to tail.
Suivant encore un autre mode de réalisation, le circuit électrique du module comporte un condensateur non polarisé et une résistance en série.According to yet another embodiment, the electrical circuit of the module comprises an unpolarized capacitor and a series resistor.
A titre d'exemple uniquement, on décrit des modes de réalisation de l'invention en se reportant aux dessins dans lesquels :
- la figure 1
- est une vue en perspective d'un dispositif de porte comportant une porte formant l'ouvrant et un dormant encadrant l'ouvrant et une serrure électromagnétique pour assurer l'ouverture et/ou la fermeture de la porte ;
- la figure 2
- représente un schéma simplifié du circuit électrique de commande du courant passant dans la bobine de l'électroaimant de la ventouse électromagnétique qui commande l'ouverture/fermeture de la serrure de la
figure 1 ; - la figure 3
- représente la courbe donnant la tension aux bornes de la bobine en fonction du temps, à partir d'un point dans le temps un peu avant l'interruption de l'alimentation; et
- la figure 4
- est un schéma d'un autre mode de réalisation du circuit électrique de commande de la serrure de la
figure 1 .
- Figure 1
- is a perspective view of a door device comprising a door forming the opening and a frame framing the opening and an electromagnetic lock to ensure the opening and / or closing of the door;
- Figure 2
- represents a simplified diagram of the electrical circuit for controlling the current flowing in the coil of the solenoid electromagnet that controls the opening / closing of the lock of the
figure 1 ; - Figure 3
- represents the curve giving the voltage across the coil as a function of time, from a point in time a little before the interruption of the supply; and
- Figure 4
- is a diagram of another embodiment of the electric control circuit of the lock of the
figure 1 .
A la
L'ouverture/fermeture de la porte est commandé par une serrure électromagnétique, comportant deux éléments, une ventouse 3 électromagnétique et une contreplaque 1, La ventouse électromagnétique comporte deux profilés en U, emboîtés l'un dans l'autre de manière à définir une enceinte fermée à l'intérieur de laquelle est logé un électroaimant 4 destiné à créer un champ magnétique pour attirer la contreplaque 1 contre la ventouse électromagnétique avec une force supérieure à au moins la force maximum qu'un humain est capable de fournir pour ouvrir la porte.The opening / closing of the door is controlled by an electromagnetic lock, comprising two elements, an electromagnetic suction cup and a
Dans l'enceinte fermée définie par les deux profilés en U, est également reçu un circuit électrique de commande de l'électroaimant, par exemple monté sur une carte électronique.In the closed enclosure defined by the two U-shaped profiles, is also received an electrical control circuit of the electromagnet, for example mounted on an electronic card.
Le circuit électrique ou électronique comporte une alimentation en courant, par exemple sous la forme d'une pile 2 qui, en fonction des applications peut avoir une valeur Vo qui peut être comprise habituellement entre 8 et 64 Volts, par exemple 12V, 24V ou 48V, destinée à faire passer dans une bobine L d'inductance de l'électroaimant un courant d'aimantation. Cette gamme de tension et ces valeurs de tension ne sont cependant données qu'à titre d'exemple, et on pourra prévoir d'autres valeurs plus grandes de la tension sans sortir de la portée de l'invention.The electrical or electronic circuit comprises a power supply, for example in the form of a
Dans la présente demande, on décrit l'électroaimant comme comportant une seule bobine d'inductance. Cependant, ceci est uniquement dans un but de simplifier la description, et il va de soi que l'on peut soit prévoir plusieurs bobines formant une bobine équivalente qui pourra alors être considérée comme étant ladite au moins une bobine de l'électroaimant, soit prévoir plusieurs bobines et n'en considérer qu'une seule au titre de la dite au moins une bobine.In the present application, the electromagnet is described as having a single inductance coil. However, this is only for the purpose of simplifying the description, and it goes without saying that one can either provide several coils forming an equivalent coil which can then be considered as being said at least one coil of the electromagnet, or provide several coils and consider only one under the said at least one coil.
Un interrupteur 10 permet la coupure du circuit. L'interrupteur 10 est relié à un bouton de commande de l'ouverture de la porte.A
En outre, un module 22 de circuit, constitué de deux condensateurs 20 et 21 polarisés et montés en série tête bêche, est monté en parallèle aux bornes de l'inductance L de l' électroaimant. Ce module 22 de circuit a pour fonction, lorsque le courant passant dans la bobine est coupé par l'ouverture de l'interrupteur 10, dans un premier temps de prélever l'énergie de l'impulsion de tension de coupure créée par l'ouverture de l'interrupteur en chargeant l'un des deux condensateurs, et de décharger l'autre condensateur pour envoyer un courant dans la bobine dans le sens inverse du courant passant dans la bobine avant ouverture de l'interrupteur, pour annuler ou surmonter le champ magnétique rémanent.In addition, a
Lorsque l'interrupteur 10 est fermé, la porte est normalement fermée et un courant électrique passe dans la bobine, ce qui crée un champ magnétique. Ce champ magnétique attire la contreplaque en un matériau ferromagnétique, par exemple métallique, contre la ventouse et empêche l'ouverture de la porte.When the
Lorsqu'un utilisateur se présente pour ouvrir la porte, il peut par exemple appuyer sur un bouton (éventuellement après avoir taper un code d'accès) ou introduire une carte à puce ou analogue pour activer un circuit qui est relié à l'interrupteur de sorte que l'actionnement du bouton entraîne l'ouverture de l'interrupteur. L'alimentation en courant d'aimantation par la pile 2 est alors coupée.
La coupure de l'alimentation par l'ouverture de l'interrupteur créé une impulsion de tension de coupure ayant une valeur égale à - Vm (voir la
De préférence, on a monté une varistance V aux bornes de la bobine et du module 22 pour limiter la valeur absolue Vm de la tension maximale de l'impulsion de coupure. Cependant, on limite Vm à une valeur supérieure à V0 (comme représenté à la
Quasiment simultanément à l'ouverture de l'interrupteur et à la coupure de l'alimentation en courant, les condensateurs 20 et 21 effectuent alors un cycle de charge-décharge qui crée dans la bobine un courant transitoire négatif. Ce courant transitoire, qui classiquement ne dure que quelques millisecondes, a pour effet d'annuler ou de diminuer très fortement le champ magnétique rémanent. Il en résulte que l'utilisateur peut ouvrir la porte sans avoir à surmonter la force électromagnétique résultant du champ magnétique rémanent. Pendant, ce cycle ce charge-décharge, les deux condensateurs inversent leur polarités respectives et sont disponibles immédiatement pour un nouveau cycle.When a user comes to open the door, he can for example press a button (possibly after typing an access code) or introduce a smart card or the like to activate a circuit that is connected to the switch. so that the actuation of the button causes the opening of the switch. The magnetization current supply by the
Switching off the power supply by opening the switch creates a cut-off voltage pulse having a value equal to -Vm (see FIG.
Preferably, a varistor V has been mounted across the coil and the
Almost simultaneously with the opening of the switch and the interruption of the power supply, the
Par exemple, pour une alimentation de 12V, respectivement 24V, respectivement 48V, le courant passant dans la bobine est de 500mA, 250mA et 125mA. La résistance interne de l'alimentation pouvant être par exemple de respectivement 25, 100, 400 Ohms, sans que l'invention soit limitée de quelque façon que ce soit à cette valeur.For example, for a supply of 12V respectively 24V, respectively 48V, the current flowing in the coil is 500mA, 250mA and 125mA. The internal resistance of the power supply may for example be respectively 25, 100, 400 Ohms, without the invention being limited in any way to this value.
Les deux condensateurs, qui peuvent être notamment des condensateurs de la marque Jamicon, ont par exemple une capacité de 1000 microfarads pour une tension nominale de 25V, sans que l'invention soit limitée de quelque façon que ce soit à cette valeur.The two capacitors, which may be in particular capacitors of the Jamicon brand, have for example a capacity of 1000 microfarads for a nominal voltage of 25V, without the invention being limited in any way to this value.
On peut prévoir de rajouter une résistance R dans le circuit 22. cependant, il s'agit d'une caractéristique optionnelle. En outre il est préférable de ne pas la placer entre les deux condensateurs 20 et 21.It can be provided to add a resistor R in the
La valeur caractéristique de l'inductance est par exemple égale à 2800H/24Volts, sans que l'invention soit limitée de quelque façon que ce soit à cette valeur.The characteristic value of the inductor is for example equal to 2800H / 24Volts, without the invention being limited in any way whatsoever to this value.
A la
Cette courbe est continue, c'est à dire qu'elle ne comporte pas de discontinuité telle que des sauts brusques, à partir de la coupure de l'interrupteur à to.This curve is continuous, that is to say that it does not include discontinuity such as sudden jumps, from the switch off to to.
A l'instant to, l'utilisateur appuie sur le bouton d'ouverture de la porte, enclenchant l'interrupteur à l'état ouvert. La tension aux bornes de la bobine chute alors très rapidement en créant une impulsion de tension(de l'ordre de 1ms) jusqu'à une valeur Vm. Il s'agit du phénomène classique de tension de coupure.At instant to, the user presses the door opening button, switching on the switch in the open state. The voltage across the coil then drops very quickly creating a pulse of voltage (of the order of 1ms) up to a value Vm. This is the classic phenomenon of cut-off voltage.
La varistance V limite la valeur Vm.Varistor V limits the value Vm.
L'action des modules 22 ou 22" aux
Dans le cas préférable où Vm est supérieur à Vo (par exemple compris entre 1,5 fois et 3 fois Vo) le circuit électrique (notamment dans le cas où il comporte un des modules 22 ou 22") est tel que la tension repasse à la valeur -Vo au bout d'un intervalle de temps Δto supérieur à 40ms, notamment supérieur à 70ms.In the preferable case where Vm is greater than Vo (for example between 1.5 times and 3 times Vo) the electrical circuit (especially in the case where it comprises one of the
On obtient ainsi une annulation de l'effet de rémanence en un temps de l'ordre du dixième à quelques dixièmes de seconde, imperceptible pour l'utilisateur, qui n'a donc pas l'impression d'avoir une force à surmonter pour ouvrir la porte. Ensuite, l'amortissement de la forme sinusoïdale s'effectue en quelques oscillations, en un temps de quelques millièmes de seconde.This provides a cancellation of the remanence effect in a time of the order of a tenth to a few tenths of a second, imperceptible to the user, which does not have the impression of having a force to overcome to open the door. Then, the damping of the sinusoidal shape takes place in a few oscillations, in a time of a few thousandths of a second.
En outre, après passage au zéro à to+ΔTo, la tension s'amortit de manière sinusoïdale autour de zéro. En particulier, la demi période d'oscillation (Δt1-ΔTo à la
A la
Pour former le courant électrique, on utilise une source de courant sous la forme d'une pile 2, de tension nominale de par exemple 12V, 24V ou 48V. Le courant passant dans la bobine est de 500mA, 250mA et 125mA. La résistance interne de l'alimentation pouvant être par exemple de respectivement 25, 100, 400 Ohms, sans que l'invention soit limitée de quelque façon que ce soit à cette valeur. La valeur caractéristique de l'inductance est par exemple égale à 2800H/24Volts, sans que l'invention soit limitée de quelque façon que ce soit à cette valeur.To form the electric current, a current source is used in the form of a
En outre un module 22" de circuit sous la forme d'une condensateur 34 non polarisé et d'une résistance R' montés en série est monté aux bornes de l'inductance, en parallèle avec celle ci.In addition, a
Ce module 22 de circuit a pour fonction, lorsque le courant passant dans la bobine est coupé par l'ouverture de l'interrupteur 10, dans un premier temps de prélever l'énergie de l'impulsion de tension de coupure créée par l'ouverture de l'interrupteur en chargeant l'un des deux condensateurs, et de décharger l'autre condensateur pour envoyer un courant dans la bobine dans le sens inverse du courant passant dans la bobine avant ouverture de l'interrupteur, pour annuler ou surmonter le champ magnétique rémanent.This
Le condensateur 34 et la résistance R' peuvent, par exemple et sans que l'invention soit limitée à ces valeurs, avoir les valeurs caractéristiques respectivement de 25V/1000µF et 100 Ohms.The
La courbe donnant l'intensité passant dans la bobine L à partir de quelques instants avant l'ouverture de l'interrupteur est de forme identique à celle représentée à la
En particulier, à partir du point to, instant d'ouverture de l'interrupteur, l'intensité diminue suivant une pente telle que le courant devient nulle au bout d'un intervalle de temps de quelques millièmes de seconde. Une fois l'intensité annulée, toute l'énergie de la bobine a été récupérée par le module 22" et le condensateur 34 se décharge par la résistance R' jusqu'à ce que le courant atteigne le point le plus bas de la courbe. A cet instant, d'environ quelques millièmes de seconde, la rémanence est alors effacée et la porte s'ouvre sans difficulté. Ensuite, le même cycle que ci dessus recommence, mais fortement amorti, pendant quelques oscillations, avant extinction finale du courant.In particular, from the point to, moment of opening of the switch, the intensity decreases along a slope such that the current becomes zero after a time interval of a few thousandths of a second. Once the intensity has been canceled, all the energy of the coil has been recovered by the
Aux figures, le mode de réalisation décrit prévoit de fixer la contreplaque à l'ouvrant et la ventouse au dormant. Cependant, suivant un autre mode de réalisation faisant partie de l'étendue de protection de la présente invention, on peut prévoir l'inverse.In the figures, the embodiment described provides for fixing the plywood to the opening and the suction cup to the frame. However, according to another embodiment forming part of the scope of protection of the present invention, the reverse can be provided.
En outre, que ce soit le montage de la
Claims (12)
- Device forming an electromagnetic lock comprising an electromagnetic suction pad (3) comprising an electromagnet (4), a counter plate (1) and an electric circuit comprising a source (2) of current designed to supply at least one coil (L) of the electromagnet of the electromagnetic suction pad with an electric magnetisation current to create an electromagnetic field and an associated electromagnetic force pinning the counter plate and the electromagnetic suction pad against one another to close the lock; switching means (10) designed to disconnect the current supply; and anti-remanent means for dealing with the remanent electromagnetic force which remains when the switching means (10) have disconnected the supply (2) of current to the coil of the electromagnet, wherein the electric circuit is set up such that the source (2) of the current supply is mounted directly at the terminals of the at least one coil (L) such that when the switching means (10) disconnects the supply of current, a disconnection voltage (-Vm) in the form of a pulse, in particular a negative pulse, appears at the terminals of the coil characterised in that the absolute value (Vm) of the disconnection voltage is greater than the absolute value (Vo) of the supply voltage and the electric circuit comprises means (22; 22") for delaying the switchover to zero on return of the pulse, in particular for a duration of at least 40 milliseconds (ms), preferably at least 100 ms, even more preferably more than 150 ms, for example between 100 ms and 300 ms.
- Device according to claim 1, characterised in that means are provided for limiting the maximum absolute value of the voltage disconnection pulse, in particular means in the form of a varistor mounted at the terminals of the at least one coil, the means for limiting the maximum absolute value limit the absolute value of the maximum voltage to a value greater than the supply voltage.
- Device according to one of claims 1 or 2, characterised in that the electric circuit is setup such that the voltage having passed zero once on return from the peak of the disconnection pulse and possibly damped by the limiting means, in particular the varistor, oscillates around zero while being dampened, in particular becoming substantially zero after one or two pulse periods.
- Device according to one of claims 1 to 3, characterised in that the electric circuit comprises at least one capacitor (20, 21; 34).
- Device according to claim 4, characterised in that the electric circuit comprises two polarised capacitors (20, 21) in series mounted head to tail.
- Device according to claim 5, characterised in that the two capacitors (20, 21) in series are mounted in parallel with the power supply (2).
- Device according to claim 5 or 6, characterised in that the two capacitors (20, 21) in series are mounted in parallel with the inductance coil (L) of the electromagnet (4) of the suction pad.
- Device according to claim 4, characterised in that the electric circuit comprises a non-polarised capacitor (34) mounted in series with a resistor (R'), mounted in parallel with the at least one coil (L).
- Module forming an anti-remanent device for an electromagnetic lock designed to be integrated into an electromagnetic lock and in particular into the electric or electronic control circuit of the device according to one of the preceding claims, the module comprising means for delaying the switchover to zero on return of the disconnection voltage pulse coming from the power source of the circuit, in particular for a duration of at least 40 milliseconds (ms), preferably at least 100 ms, more preferably more than 150 ms, for example between 100 ms and 300 ms.
- Module according to claim 9, characterised in that it comprises two polarised capacitors mounted in series.
- Module according to claim 10, characterised in that the two capacitors are mounted head to tail.
- Device forming a door comprising an openable part (P) and a frame (D) and a device forming an electromagnetic lock according to one of claims 1 to 8, one of the two elements of the device forming an electromagnetic lock, namely the electromagnetic suction pad (3) and the counter plate (1), being fixed to the openable part, whereas the other of the two elements is fixed to the frame.
Priority Applications (1)
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PL15152125T PL2899343T3 (en) | 2014-01-24 | 2015-01-22 | Anti-remanence device for electromagnetic lock |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1400153A FR3016913A1 (en) | 2014-01-24 | 2014-01-24 | ANTI-REMANENCE DEVICE FOR ELECTROMAGNETIC LOCK |
FR1400578A FR3016914B1 (en) | 2014-01-24 | 2014-03-10 | ANTI-REMANENCE DEVICE FOR ELECTROMAGNETIC LOCK |
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EP2899343A1 EP2899343A1 (en) | 2015-07-29 |
EP2899343B1 true EP2899343B1 (en) | 2018-10-31 |
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US (1) | US10392840B2 (en) |
EP (1) | EP2899343B1 (en) |
ES (1) | ES2709007T3 (en) |
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US10937262B2 (en) | 2017-08-30 | 2021-03-02 | Sensormatic Electronics, LLC | Door system with power management system and method of operation thereof |
US10968669B2 (en) | 2017-08-30 | 2021-04-06 | Sensormatic Electronics, LLC | System and method for inductive power transfer to door |
US10943415B2 (en) * | 2017-08-30 | 2021-03-09 | Sensormatic Electronics, LLC | System and method for providing communication over inductive power transfer to door |
CN109488091B (en) * | 2018-12-14 | 2024-02-02 | 浙江大学自贡创新中心 | Residual magnetic force counteracting device and stereo garage thereof |
US11434675B2 (en) * | 2019-09-05 | 2022-09-06 | Ford Global Technologies, Llc | Vehicle storage assembly having residual magnetic latching mechanism |
TWI727614B (en) * | 2020-01-17 | 2021-05-11 | 茂旭資訊股份有限公司 | Magnetic lock with elastic pusher to eliminate residual magnetism |
CN112349002B (en) * | 2020-10-20 | 2022-09-02 | 苏州市东挺河智能科技发展有限公司 | Energy-saving magnetic lock with buffering function |
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EP0045197A1 (en) * | 1980-07-28 | 1982-02-03 | Bsg (Security) Limited | Electromagnetic lock |
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2014
- 2014-03-10 FR FR1400578A patent/FR3016914B1/en active Active
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2015
- 2015-01-22 PL PL15152125T patent/PL2899343T3/en unknown
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- 2015-01-22 EP EP15152125.9A patent/EP2899343B1/en active Active
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FR3016914B1 (en) | 2020-04-24 |
US10392840B2 (en) | 2019-08-27 |
PL2899343T3 (en) | 2019-05-31 |
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