EP3870796B1 - Actionneur électromécanique et installation domotique comprenant un tel actionneur - Google Patents

Actionneur électromécanique et installation domotique comprenant un tel actionneur Download PDF

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Publication number
EP3870796B1
EP3870796B1 EP19791263.7A EP19791263A EP3870796B1 EP 3870796 B1 EP3870796 B1 EP 3870796B1 EP 19791263 A EP19791263 A EP 19791263A EP 3870796 B1 EP3870796 B1 EP 3870796B1
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EP
European Patent Office
Prior art keywords
spring
spring brake
rotation
electromechanical actuator
output member
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.)
Active
Application number
EP19791263.7A
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German (de)
English (en)
French (fr)
Other versions
EP3870796A1 (fr
Inventor
Stéphane HEREDIA
Rémi Sourain
Gilles PRADEL
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.)
Somfy Activites SA
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Somfy Activites SA
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Publication of EP3870796A1 publication Critical patent/EP3870796A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive
    • E06B9/72—Operating devices or mechanisms, e.g. with electric drive comprising an electric motor positioned inside the roller
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions
    • E06B2009/905—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions using wrap spring clutches

Definitions

  • the present invention relates to an electromechanical actuator.
  • the electromechanical actuator includes a spring brake. This type of brake is more particularly suitable for a so-called tubular electromechanical actuator.
  • the present invention also relates to a home automation installation for closing or solar protection comprising a screen that can be rolled up on a winding tube driven in rotation by such an electromechanical actuator.
  • the present invention relates to the field of screening devices comprising a motorized drive device that sets a screen in motion between at least a first position and at least a second position.
  • a motorized drive device comprises an electromechanical actuator for a movable closing, shading or solar protection element such as a shutter, a door, a grille, a blind or any other equivalent material, hereinafter called a screen. .
  • the electromechanical actuator includes an electric motor, a gearbox and a spring brake.
  • the spring brake includes a coil spring, a drum, an input member and an output member.
  • the coil spring is formed from a wire.
  • a first end of the coil spring forms a first leg, extending radially relative to an axis of rotation of the spring brake.
  • a second end of the coil spring forms a second leg, extending radially relative to the axis of rotation of the spring brake.
  • the coils of the coil spring are configured to be joined in a resting state of the spring brake.
  • the drum comprises a housing, of cylindrical shape.
  • the drum housing includes an internal friction surface configured to cooperate with at least one coil of the coil spring, in an assembled configuration of the spring brake. In this way, at least one coil of the coil spring is constrained radially by the housing of the drum.
  • the output member includes a first ear and a second ear. Each of the first and second ears includes a recess. The recess of each of the first and second ears comprises a bearing surface configured to cooperate with one of the first and second legs of the coil spring, in the assembled configuration of the spring brake.
  • the input member is configured to be driven in rotation by the motor electric.
  • a drive tooth of the input member is configured to cooperate with one of the first and second legs of the coil spring, so as to drive the coil spring in rotation about an axis of rotation of the spring brake in a first direction of rotation.
  • Such movement releases the spring brake.
  • the friction force between the coils of the coil spring and the inner surface of the housing of the drum is reduced when the coil spring is driven in rotation in the first direction of rotation. In other words, this movement tends to reduce the diameter of the outer casing of the coil spring and therefore to reduce the radial stress between the coil spring and the inner surface of the housing of the drum.
  • One of the first and second lugs of the output member is configured to cooperate with one of the first and second lugs of the coil spring, so as to drive the coil spring in rotation around the axis of rotation of the brake. spring in a second direction of rotation, the second direction of rotation being opposite to the first direction of rotation.
  • Such movement activates the spring brake.
  • the friction force between the coils of the coil spring and the inner surface of the housing of the drum is increased during the rotational drive of the coil spring in the second direction of rotation. In other words, this movement tends to increase the diameter of the outer shell of the coil spring and therefore to increase the radial stress between the coil spring and the inner surface of the housing of the drum.
  • this electromechanical actuator has the disadvantage of generating operating noise and of separating the coils of the helical spring relative to each other, during a braking phase implemented by the spring brake. These phenomena are due to the fact that the bearing surface of the recess of the output member is parallel to the axis of rotation of the spring brake.
  • the braking phase implemented by the spring brake corresponds, more particularly, to a lowering phase of a screen of a concealment device of the installation.
  • the object of the present invention is to solve the aforementioned drawbacks and to propose an electromechanical actuator for a home automation system for closing or solar protection comprising a spring brake, as well as a home automation system for closing or solar protection comprising such an electromechanical actuator. , making it possible to avoid the spacing of the turns of the helical spring from each other others, during a braking phase implemented by the spring brake, as well as to reduce the operating noise of the spring brake, during the rotational drive of an input member and/or an output member with respect to a drum.
  • the first bearing surface of the recess of the output member is inclined relative to an axis of rotation of the spring brake by an angle of inclination of non-zero value.
  • the angle of inclination of the first bearing surface of the recess of the output member relative to the axis of rotation of the spring brake makes it possible to avoid a separation of the turns of the helical spring relative to each other, during a braking phase of the spring brake, and, more particularly, of a first turn of the helical spring relative to a following turn of the helical spring, during a braking phase of the spring brake, as well as to reduce the operating noises of the spring brake, during the rotational drive of the input member and/or of the output member relative to the drum .
  • the angle of inclination of the first bearing surface of the recess of the output member with respect to the axis of rotation of the spring brake makes it possible to guarantee a lateral force on one of the first and second legs of the coil spring, so as to maintain the contiguous turns of the coil spring, during a braking phase of the spring brake.
  • the angle of inclination of the first bearing surface of the recess of the output member relative to the axis of rotation of the spring brake makes it possible to induce a force at the level of one of the first and second lugs of the helical spring and thus to attenuate the vibration of the helical spring, by stabilizing this force at the level of the first turn of the helical spring.
  • the first coil of the coil spring may also be referred to as the end coil of the coil spring connected to one of the first and second legs of the coil spring.
  • the value of the angle of inclination is within a range of values extending between 5° and 45° and is preferably of the order of 20° to 25°.
  • the inclination of the first bearing surface of the recess relative to the axis of rotation of the spring brake is such that this first bearing surface is oriented towards the inside the outlet.
  • the output member comprises a first ear and a second ear.
  • Each of the first and second ears includes a recess.
  • the recess of each of the first and second lugs comprises at least the first bearing surface configured to cooperate with one of the first and second legs of the coil spring, in the assembled configuration of the spring brake.
  • the first bearing surface of at least one of the recesses of the output member is inclined relative to the axis of rotation of the spring brake by an angle of inclination of non-zero value.
  • the recess of the output member comprising the first bearing surface inclined with respect to the axis of rotation of the spring brake is that of the first or the second lug of the output member configured to cooperate with the first or the second lug of the coil spring, during a braking phase of the spring brake.
  • the first bearing surface of each of the recesses of the output member is inclined relative to the axis of rotation of the spring brake by the angle of inclination of value not nothing.
  • each of the first and second lugs of the coil spring extends radially with respect to the axis of rotation of the spring brake.
  • the input member comprises a drive tooth.
  • the first leg of the coil spring is configured to cooperate with a first surface of the drive tooth of the input member and the second leg of the coil spring is configured to cooperate with a second surface of the drive tooth of the input member.
  • the second drive tooth surface opposes the first drive tooth surface.
  • the spring brake also comprises a cover.
  • the input member and the cover are held integral in rotation around the axis of rotation, in the assembled configuration of the spring brake.
  • the recess comprises at least a second bearing surface inclined with respect to the axis of rotation of the spring brake by an angle of inclination of non-zero value.
  • the present invention relates, according to a second aspect, to a home automation installation for closing or solar protection comprising a screen that can be rolled up on a winding tube driven in rotation by an electromechanical actuator according to the invention.
  • This home automation installation has characteristics and advantages similar to those previously described in relation to the electromechanical actuator according to the invention, as mentioned above.
  • FIG. 1 a home automation installation according to a first embodiment of the invention and installed in a building comprising an opening 1, window or door, equipped with a screen 2 belonging to a concealment device 3, in particular a motorized rolling shutter .
  • the concealment device 3 can be a rolling shutter, as illustrated in the figures 1 and 2 , a canvas blind or with adjustable slats, or even a rolling gate.
  • the present invention applies to all types of concealment device.
  • the screen 2 of the screening device 3 is rolled up on a rolling tube 4 driven by a motorized drive device 5 and movable between a rolled up position, in particular high, and an unrolled position, in particular low.
  • the mobile screen 2 of the concealment device 3 is a closing, concealment and/or solar protection screen, being rolled up on the winding tube 4, the internal diameter of which is substantially greater than the external diameter of a electromechanical actuator 11, so that the electromechanical actuator 11 can be inserted into the winding tube 4, when assembling the occultation device 3.
  • the motorized drive device 5 comprises the electromechanical actuator 11, in particular of the tubular type, making it possible to set the winding tube 4 in rotation, so as to unwind or wind the screen 2 of the screening device 3.
  • the dimming device 3 includes the winding tube 4 for winding the screen 2. In the assembled state, the electromechanical actuator 11 is inserted into the winding tube 4.
  • the roller shutter which forms the concealment device 3
  • the roller shutter comprises an apron comprising horizontal slats hinged to each other, forming the screen 2 of the roller shutter 3, and guided by two side slides 6. These slats are contiguous, when the apron 2 of the roller shutter 3 reaches its low unrolled position.
  • the rolled up position corresponds to the bearing of a final end slat 8, for example L-shaped, of the apron 2 of the roller shutter 3 against an edge of a box. 9 of the rolling shutter 3 or when the final end slat 8 stops in a programmed upper end-of-travel position.
  • the unrolled low position corresponds to the resting of the final end slat 8 of the apron 2 of the roller shutter 3 against a threshold 7 of the opening 1 or to the stopping of the final end slat 8 in a programmed bottom end position.
  • the first slat of the apron 2 of the roller shutter 3, opposite the final end slat 8, is connected to the winding tube 4 by means of at least one joint 10, in particular an attachment piece in the form of a band .
  • the winding tube 4 is arranged inside the box 9 of the roller shutter 3.
  • the apron 2 of the roller shutter 3 is rolled up and unrolled around the winding tube 4 and is housed at least in part at the trunk interior 9.
  • the trunk 9 is arranged above the opening 1, or even in the upper part of the opening 1.
  • the motor drive device 5 is controlled by a control unit.
  • the control unit can for example be a local control unit 41, where the local control unit 41 can be connected by wired or wireless link with a central control unit 42.
  • the central control unit 42 can control the local control unit 41, as well as other similar local control units distributed in the building.
  • the central control unit 42 can be in communication with a remote weather station outside the building, including, in particular, one or more sensors that can be configured to determine, for example, a temperature, a luminosity or even a speed of wind.
  • a remote control 43 which can be a type of local control unit, provided with a control keyboard and which comprises selection and display elements, also allows a user to intervene on the electromechanical actuator 11, the local control unit 41 and/or the central control unit 42.
  • the motorized drive device 5 is preferably configured to execute commands for unwinding or rolling up the screen 2 of the screening device 3, which can be issued, in particular, by the remote control 43.
  • the electromechanical actuator 11 comprises at least one electric motor 12, a reducer 14 and a spring brake 15.
  • the electric motor 12 comprises a rotor and a stator, not shown, positioned coaxially around an axis of rotation X, which is also the axis of rotation of the winding tube 4 in the mounted configuration of the motorized drive device 5.
  • Means for controlling the electromechanical actuator 11, allowing the movement of the screen 2 of the concealment device 3, comprise at least one unit control electronics 44.
  • This electronic control unit 44 is able to put the electric motor 12 of the electromechanical actuator 11 into operation and, in particular, allow the supply of electric power to the electric motor 12.
  • the electronic control unit 44 controls, in particular, the electric motor 12, so as to open or close the screen 2, as described previously.
  • the electronic control unit 44 also includes a communication module 55, as illustrated in picture 3 , in particular for receiving control commands, the control commands being transmitted by a command transmitter, such as the remote control 43, intended to control the electromechanical actuator 11, or one of the local control units 41 or central 42.
  • a command transmitter such as the remote control 43
  • the communication module 55 of the electronic control unit 44 is of the wireless type.
  • the communication module 55 is configured to receive radio control commands.
  • the communication module 55 can also allow the reception of control commands transmitted by wired means.
  • the electronic control unit 44 is arranged inside a casing 13 of the electromechanical actuator 11.
  • the control means of the electromechanical actuator 11 comprise hardware and/or software means.
  • the hardware means may comprise at least one microcontroller.
  • the electromechanical actuator 11 is supplied with electrical energy by a mains power supply network, or by means of a battery, which can be recharged, for example, by a photovoltaic panel.
  • the electromechanical actuator 11 makes it possible to move the screen 2 from the concealment device 3.
  • the electromechanical actuator 11 comprises an electric power supply cable 21 allowing it to be supplied with electric power from a mains power supply network.
  • the casing 13 of the electromechanical actuator 11 is preferably cylindrical in shape.
  • the casing 13 is made of a metallic material.
  • the material of the housing of the electromechanical actuator is not limiting and can be different. It may, in particular, be a plastic material.
  • the winding tube 4 is driven in rotation around the axis of rotation X and the housing 13 of the electromechanical actuator 11 supported via two links pivot.
  • the first pivot connection is made at a first end of the winding tube 4 by means of a crown 18 inserted around and at a first end 13a of the casing 13 of the electromechanical actuator 11.
  • the crown 18 thus makes it possible to make a landing.
  • the second pivot link is made at a second end of the winding tube 4.
  • the electromechanical actuator 11 comprises a torque support 19.
  • the torque support 19 projects from the first end 13a of the casing 13 of the electromechanical actuator 11, in particular the end 13a of the casing 13 receiving the crown 18
  • the torque support 19 of the electromechanical actuator 11 thus makes it possible to fix the electromechanical actuator 11 to a frame 20, in particular to a cheek of the trunk 9.
  • the torque support 19 of the electromechanical actuator 11 can make it possible to close the first end 13a of the casing 13.
  • the torque support 19 of the electromechanical actuator 11 can make it possible to support the electronic control unit 44.
  • the electronic control unit 44 can be supplied with electrical energy by means of the electrical supply cable 21 electrically connected to the mains power supply network, or to a battery.
  • the reducer 14 comprises at least one reduction stage.
  • the reduction stage may be an epicyclic type gear train.
  • the type and number of reduction stages of the reducer are not limiting.
  • the reduction stages can be, for example, two or three in number.
  • the electromechanical actuator 11 comprises an output shaft 16. One end of the output shaft 16 projects relative to the casing 13 of the electromechanical actuator 11, in particular relative to a second end 13b of the casing 13 opposite its first end 13a.
  • the output shaft 16 of the electromechanical actuator 11 drives in rotation, in other words is configured to drive in rotation, a connecting element 17 connected to the winding tube 4, in an assembled configuration of the electromechanical actuator 11.
  • connecting element 17 is made in the form of a wheel.
  • the electric motor 12 and the reducer 14 rotate the output shaft 16.
  • the output shaft 16 of the electromechanical actuator 11 rotates the winding tube 4 via the connecting element 17.
  • the winding tube 4 rotates the screen 2 of the concealment device 3, so as to open or close opening 1.
  • the electric motor 12, the reducer 14 and the spring brake 15 are mounted inside the casing 13 of the electromechanical actuator 11.
  • the spring brake 15 is arranged between the electric motor 12 and the reduction gear 14, that is to say at the output of the electric motor 12.
  • the spring brake 15 is arranged between two reduction stages of the reducer 14.
  • the spring brake 15 is arranged at the output of the reducer 14.
  • the electromechanical actuator 11 may also include an end-of-travel and/or obstacle detection device. This detection device can be mechanical or electronic.
  • the spring brake 15 comprises at least a coil spring 22, a drum 23, an input member 24, an output member 25 and, optionally, a cover 33.
  • the drum 23 is held in position in the casing 13 of the electromechanical actuator 11, in particular by means of clearances 28 made on the outer periphery of the drum 23 and cooperating, in other words configured to cooperate, with tabs, not shown. , of a gearbox housing 14, in the assembled configuration of the electromechanical actuator 11.
  • gearbox housing 14 is held in position in the housing 13 of the electromechanical actuator 11, by suitable mechanical elements, for example by cooperation of shapes.
  • the drum 23 comprises a housing 26.
  • housing 26 of the drum 23 is cylindrical in shape.
  • housing 26 of drum 23 opens out.
  • the coil spring 22, the input member 24, the output member 25 and, optionally, the cover 33 are arranged inside the housing 26 of the drum 23, in an assembled configuration of the spring brake 15 .
  • the output member 25 is arranged opposite the input member 24.
  • Coil spring 22 has a plurality of coils. The turns of the coil spring 22 are centered on an axis coinciding with the axis of rotation X, when the spring brake 15 is assembled and then mounted in the electromechanical actuator 11.
  • the input member 24 and the output member 25 are centered on an axis coincident with the axis of rotation X, when the spring brake 15 is assembled and then mounted in the electromechanical actuator 11.
  • each of the members 22, 23, 24, 25, 33 of the spring brake 15 is not represented on the figures 4 to 8 , so as to simplify their reading.
  • the drum 23 comprises a surface, called friction surface 27, cooperating, in other words configured to cooperate, with at least one turn of the helical spring 22, in the assembled configuration of the spring brake 15.
  • the friction surface 27 of the drum 23 is an internal surface of the housing 26 of the drum 23.
  • At least one turn of the coil spring 22 is constrained radially by the housing 26 of the drum 23.
  • the helical spring 22 is mounted tightly inside the housing 26 of the drum 23, so as to secure by friction the helical spring 22 and the drum 23, when the helical spring 22 is at rest, as illustrated in figure 5 .
  • Coil spring 22 is formed from wire 48. A first end of coil spring 22 forms a first leg 29a. A second end of the coil spring 22 forms a second tab 29b. The helical spring 22 is with contiguous turns, in a state of rest of the spring brake 15.
  • the coil spring 22 has two tabs 29a, 29b, respectively visible to figure 4 and 6 .
  • each of the first and second legs 29a, 29b extends radially with respect to the axis of rotation X and, in particular, towards the inside of the coil spring 22.
  • each of the first and second legs 29a, 29b of the coil spring 22 extends radially with respect to the axis of rotation X, in the assembled configuration of the spring brake 15.
  • each of the first and second legs 29a, 29b of the coil spring 22 extends axially relative to the axis of rotation X, in the assembled configuration of the spring brake 15.
  • first and second legs 29a, 29b of the coil spring 22 extend radially relative to the axis of rotation X and towards inside the coil spring 22, in particular from the turns of the coil spring 22 towards the central axis of the coil spring 22, as illustrated in figure 4 .
  • the input member 24 includes a drive tooth 31.
  • the drive tooth 31 extends between the input member 24 and the cover 33, in the assembled configuration of the spring brake 15.
  • the drive tooth 31 of the input member 24 is inserted inside the coil spring 22, in the assembled configuration of the spring brake 15.
  • the input member 24, in particular the drive tooth 31 of the input member 24, cooperates, in other words is configured to cooperate, with at least one of the first and second legs 29a, 29b of the spring coil 22, in the assembled configuration of the spring brake 15, so as to rotate the coil spring 22 around the axis of rotation X in a first direction of rotation.
  • Such a movement releases the spring brake 15 and, more particularly, the coil spring 22 with respect to the drum 23.
  • the friction force between at least one turn of the coil spring 22 and the inner surface 27 of the housing 26 of the drum 23 is reduced when the rotation of the coil spring 22 in the first direction of rotation.
  • this movement tends to reduce the diameter of the outer envelope of the coil spring 22 and therefore to reduce the radial stress between the coil spring 22 and the inner surface 27 of the housing 26 of the drum 23.
  • the movement generated by the electric motor 12 can be transmitted from the input member 24 to the output member 25.
  • the outer envelope of the coil spring 22 is defined by the outer generatrices of the turns of the coil spring 22.
  • Output member 25 includes at least one lug 39a, 39b.
  • the ear 39a, 39b comprises a recess 40.
  • the recess 40 of the ear 39a, 39b comprises at least a first bearing surface 46 configured to cooperate with one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the output member 25 comprises a first lug 39a and a second lug 39b, as illustrated in figure 4 and 6 to 8 .
  • the first and second lugs 39a, 39b of the output member 25 make it possible to produce the output member 25 symmetrically with respect to the axis of rotation X, so as to guarantee balancing of the spring brake 15 , during a rotational movement of the input member 24 relative to the output member 25 around the axis of X rotation.
  • each of the first and second ears 39a, 39b of the output member 25 comprises a recess 40.
  • the recess 40 of each of the first and second lugs 39a, 39b of the output member 25 cooperates, in other words is configured to cooperate, with one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the recess 40 of each of the first and second lugs 39a, 39b comprises at least one first bearing surface 46 cooperating, in other words being configured to cooperate, with one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the first and second lugs 39a, 39b of the output member 25 are inserted, in other words configured to be inserted, inside the coil spring 22, in the assembled configuration of the spring brake 15.
  • the output member 25, in particular one of the first and second lugs 39a, 39b, cooperates, in other words is configured to cooperate, with at least one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15, so as to rotate the coil spring 22 around the axis of rotation X in a second direction of rotation.
  • the second direction of rotation is opposite to the first direction of rotation.
  • Such a movement activates the spring brake 15, that is to say tends to block or brake the rotation of the coil spring 22 inside the housing 26 of the rotary drum 23.
  • the friction force between at least one turn of the coil spring 22 and the internal surface 27 of the housing 26 of the drum 23 is increased during the rotational drive of the coil spring 22 in the second direction of rotation.
  • this movement tends to increase the diameter of the outer casing of the coil spring 22, in particular by bringing together the first and second legs 29a, 29b of the coil spring 22, and therefore to increase the radial stress between the coil spring 22 and the internal surface 27 of the housing 26 of the drum 23.
  • the spring brake 15 comprises a lubricant, not shown, disposed between the coil spring 22 and the friction surface 27 of the drum 23, in particular the internal surface 27 of the housing 26 of the drum 23.
  • the lubricant is preferably of the fat.
  • the input member 24 is driven, in other words is configured to be driven, in rotation by the electric motor 12, in the assembled configuration of the electromechanical actuator 11.
  • the first bearing surface 46 of the recess 40 is inclined relative to the axis of rotation X of the spring brake 15 by an angle of inclination ⁇ of value not zero, as shown in figure 8 .
  • the angle of inclination ⁇ of the first bearing surface 46 of the recess 40, in particular of one of the recesses 40, of the output member 25 with respect to the axis of rotation X of the spring brake 15 makes it possible to prevent the turns of the helical spring 22 from separating from each other, during a braking phase of the spring brake 15, and, more particularly, of a first turn of the helical spring 22 with respect to a following turn of the helical spring 22, during a braking phase of the spring brake 15, as well as to reduce the operating noise of the spring brake 15, during the rotational drive of the body of input 24 and/or output member 25 with respect to drum 23, in particular inside housing 26 of drum 23.
  • a zone of wear of the first bearing surface 46 of each recess 40 of the output member 25 by one of the first and second legs 29a, 29b of the helical spring 22 is centered with respect to the first surface support 46.
  • the angle of inclination ⁇ of the first bearing surface 46 of the recess 40, in particular of one of the recesses 40, of the output member 25 with respect to the axis of rotation X of the spring brake 15 makes it possible to guarantee a lateral force on one of the first and second legs 29a, 29b of the helical spring 22, so as to maintain the contiguous turns of the helical spring 22, during a braking phase of the brake spring loaded 15.
  • the angle of inclination ⁇ of the first bearing surface 46 of one of the recesses 40 of the output member 25 with respect to the axis of rotation X of the spring brake 15 makes it possible to create a bearing of one of the first and second lugs 29a, 29b of the coil spring 22 on the first bearing surface 46 of one of the recesses 40 of the output member 25, so as to create a partially axial force on the coil spring 22.
  • the lateral force of the first inclined bearing surface 46 of one of the recesses 40 of the output member 25 on one of the first and second legs 29a, 29b of the helical spring 22 can be qualified as a partially axial, in the direction of the axis of rotation X of the spring brake 15, since the latter has a non-zero axial component.
  • the angle of inclination ⁇ of the first bearing surface 46 of the recess 40, in particular of one of the recesses 40, of the output member 25 with respect to the axis of rotation X of the spring brake 15 makes it possible to induce a force at the level of one of the first and second legs 29a, 29b of the helical spring 22 and thus to attenuate the vibration of the helical spring 22, by stabilizing this force at the level of the first coil of coil spring 22.
  • the first coil of coil spring 22 may also be referred to as the end coil of coil spring 22 connected to one of the first and second legs 29a, 29b of coil spring 22.
  • the first bearing surface 46 of one of the recesses 40 is inclined with respect to a surface 54 of the first or the second ear 39a, 39b of the organ output 25 of the value of the angle of inclination a, as illustrated in figure 7 and 8 .
  • the first tab 29a of the coil spring 22 cooperates, in other words is configured to cooperate, with a first surface 38a of the drive tooth 31 of the input member 24 and the second tab 29b of the coil spring 22 cooperates, in other words is configured to cooperate, with a second surface 38b of the drive tooth 31 of the input member 24.
  • the second surface 38b of the drive tooth 31 is opposite the first surface 38a of the drive tooth 31.
  • the drive tooth 31 of the input member 24 is disposed between the first and second legs 29a, 29b of the coil spring 22 and cooperates, in other words is configured to cooperate, with one or other of the lugs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15 and according to the direction of rotational drive generated by the electric motor 12.
  • the drive tooth 31 of the input member 24 comprises two drive faces 38a, 38b.
  • Each drive face 38a, 38b of the drive tooth 31 cooperates, in other words is configured to cooperate, with one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15 .
  • the surface 54 of the first or second ear 39a, 39b of the organ of output 25 cooperates, in other words is configured to cooperate, with the first or the second surface 38a, 38b of the drive tooth 31.
  • the surface 54 of the first or second lug 39a, 39b of the output member 25 is parallel to the axis of rotation X of the spring brake 15.
  • the surface 54 of the first or second lug 39a, 39b of output member 25 extends on either side of recess 40.
  • the recess 40 of the output member 25 comprising the first bearing surface 46 inclined with respect to the axis of rotation X of the spring brake 15 is that of the first or second lug 39a, 39b of output member 25 cooperating, in other words configured to cooperate, with first or second lug 29a, 29b of coil spring 22, during a braking phase of the spring brake 15.
  • the tab 29a, 29b of the coil spring 22 and the first bearing surface 46 of the recess 40 of the output member 25 cooperating, in other words configured to cooperate, together, in the assembled configuration of the spring brake 15 are those intended to activate the spring brake 15, that is to say to generate the friction force between at least one turn of the helical spring 22 and the friction surface 27 of the drum 23, in particular the internal surface 27 of the housing 26 of the drum 23, in other words to rotate the coil spring 22 about the axis of rotation X in the second direction of rotation.
  • the inclination of the first bearing surface 46 of the recess 40, in particular of one of the recesses 40, relative to the axis of rotation X of the spring brake 15 is such that the first surface of support 46 is oriented towards the inside of the output member 25.
  • the orientation of the first inclined bearing surface 46 of one of the recesses 40 with respect to the axis of rotation X of the spring brake 15 makes it possible to guarantee the lateral force on one of the first and second tabs 29a, 29b of the coil spring 22, so as to maintain the contiguous turns of the coil spring 22, during a braking phase of the spring brake 15.
  • the value of the angle of inclination ⁇ is within a range of values extending between 5° and 45° and is preferably of the order of 20° to 25°.
  • a first limit of the range of the values is determined as being the limit below which the angle of inclination ⁇ of the first bearing surface 46 of the one of the recesses 40 of the output member 25 with respect to the axis of rotation X of the spring brake 15 does not allow to exercise an axial component of the lateral force sufficient on one of the first and second legs 29a, 29b of the helical spring 22, so as to maintain the contiguous turns of the helical spring 22, during a braking phase of the spring brake 15 .
  • a second limit of the range of the values is determined as being the limit above which the angle of inclination ⁇ of the first support surface 46 of the one of the recesses 40 of the output member 25 with respect to the axis of rotation X of the spring brake 15 induces too great a lateral force on one of the first and second legs 29a, 29b of the coil spring 22, possibly cause the overlapping of one or more turns of the coil spring 22 with respect to the other turns of the coil spring 22, during a braking phase of the spring brake 15.
  • the first bearing surface 46 of each of the recesses 40 of the output member 25 is inclined with respect to the axis of rotation X of the spring brake 15 with an angle of inclination ⁇ of non-zero value.
  • the value of the angle of inclination ⁇ is the same for the first bearing surface 46 of each of the two recesses 40.
  • the electromechanical actuator 11 can be mounted at either of the two ends of the winding tube 4, in other words at a left end or at a right end of the winding tube 4, since the operation of the brake spring 15 is identical in both directions of rotation of the output member 25 relative to the input member 24 inside the housing 26 of the drum 23.
  • the recess 40 comprises at least one second bearing surface 47 inclined with respect to the axis of rotation X of the spring brake 15 by an angle of inclination ⁇ of non-zero value.
  • ⁇ denotes the angle of inclination of the second bearing surface 47 with respect to the axis of rotation X.
  • This angle ⁇ has a non-zero value, which can be, for example, comprised in a range of values comprised between 40° and 100°.
  • the recess 40 of each of the first and second lugs 39a, 39b also comprises a second bearing surface 47 and, optionally, a third support surface, not shown, configured to cooperate with one of the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the second bearing surface 47 is inclined, with respect to the axis of rotation X, in the opposite direction to the first bearing surface 46.
  • first and second bearing surfaces 46, 47 give the recess 40 a re-entrant dihedral shape which extends from the surface 54 of the first or second lug 39a, 39b.
  • the second bearing surface 47 and, possibly, the third bearing surface of the recess 40 of each of the first and second lugs 39a, 39b make it possible respectively to produce a stop, so as to hold the first or second leg 29a, 29b of coil spring 22 within recess 40.
  • the recess 40 of the first ear 39a of the output member 25 cooperates, in other words is configured to cooperate, with the first leg 29a of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the recess 40 of the second lug 39b of the output member 25 cooperates, in other words is configured to cooperate, with the second leg 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the output member 25 is centered with respect to the input member 24 by means of a first shaft 49.
  • the first shaft 49 which is shown in section and hatched on the figure 5 , is inserted, on the one hand, in a bore 50 of the output member 25 and, on the other hand, in a bore 51 of the input member 24, in the assembled configuration of the spring brake 15.
  • a second shaft 37, in particular of the output member 25, makes it possible to receive and transmit a torque coming from the electric motor 12.
  • the second shaft 37 of the output member 25 cooperates, in other words is configured to cooperate, with the reducer 14, in the assembled configuration of the spring brake 15. More particularly, the second shaft 37 is inserted into a housing, not shown, of the reducer 14, in the assembled configuration of the spring brake 15.
  • the second shaft 37 makes it possible to receive and transmit a torque coming from the electric motor 12 to the reducer 14, via the first shaft 49
  • first shaft 49 and the second shaft 37 are respectively centered by relative to the axis of rotation X, in the assembled configuration of the electromechanical actuator 11.
  • the cover 33 includes an opening 53.
  • the opening 53 of the cover 33 is through.
  • the opening 53 of the cover 33 cooperates, in other words is configured to cooperate, with the second shaft 37, in particular of the output member 25, in the assembled configuration of the spring brake 15.
  • the second shaft 37 is inserted into the opening 53 of the cover 33, so as to extend on either side of the cover 33, in the assembled configuration of the spring brake 15.
  • the input member 24 includes a first plate 30.
  • the cover 33 includes a second plate 32.
  • the first leg 29a of the coil spring 22 extends along the first plate 30 of the input member 24 and the second leg 29b of the coil spring 22 extends along the along the second plate 32 of the cover 33.
  • the first plate 30 is integral with the drive tooth 31, preferably in one piece therewith.
  • the coil spring 22 and the output member 25 are held in position axially between the first plate 30 of the input member 24 and the second plate 32 of the cover 33.
  • the input member 24 and, more particularly, the first plate 30 comprises a spacer 34.
  • the spacer 34 extends between the input member 24 and the cover 33, in the assembled configuration of the spring brake 15 .
  • the spacer 34 of the input member 24 makes it possible to maintain an axial separation between the input member 24 and the cover 33 and, more particularly, between the first and second plates 30, 32.
  • the spacer 34 of the input member 24 is arranged diametrically opposite the drive tooth 31 of the input member 24, as illustrated in figures 4 and 5 .
  • the drive tooth 31 of the input member 24 corresponds to another spacer.
  • the drive tooth 31 of the input member 24 also makes it possible to maintain the axial separation between the input member 24 and the cover 33 and, more particularly, between the first and second plates 30, 32 .
  • the cover 33 and, more particularly, the second plate 32 comprises the spacer 34.
  • the spacer 34 then also extends between the input member 24 and the cover 33, in the assembled configuration of the spring brake 15.
  • the spacer 34 of the cover 33 can be arranged diametrically opposite the drive tooth 31 of the input member 24, with respect to the axis of rotation X, in the assembled configuration. spring brake 15.
  • the drive tooth 31 and the spacer 34 make it possible to produce the spring brake 15, in particular the input member 24, symmetrically with respect to the axis of rotation X, so as to guarantee a balancing of the spring brake 15, during a rotational movement of the input member 24 relative to the output member 25 around the axis of rotation X.
  • the first and second plates 30, 32 each comprise a peripheral flange 35, 36.
  • the two peripheral flanges 35, 36 are arranged facing each other along the axis of rotation X, in the spring brake assembly configuration 15.
  • first tab 29a of coil spring 22 is disposed between first surface 38a of drive tooth 31 of input member 24 and spacer 34.
  • the second leg 29b of the coil spring 22 is disposed between the second surface 38b of the drive tooth 31 of the input member 24 and the spacer 34.
  • the input member 24 and the cover 33 and, more particularly, the first and second plates 30, 32 are kept integral in rotation around the axis of rotation X, in the assembled configuration of the spring brake 15.
  • the input member 24 and the cover 33 are fixed to each other by means of fixing elements 52a, 52b.
  • the fixing elements 52a, 52b of the inlet member 24 and of the cover 33 are fixing elements by interlocking and, in particular, studs 52a arranged at the level of the drive tooth 31 and of the spacer 34 and holes 52b formed in the cover 33, in this case in the second plate 32.
  • a first element 52a for fixing the input member 24 is provided at the level of the drive tooth 31 of the input member 24.
  • a second fixing element 52a of the input member 24 is provided at the level of the spacer 34 of the input member 24.
  • the input member 24 comprises two fixing elements 52a and the cover 33 comprises two fixing elements 52b.
  • the number of fastening elements of the inlet member and of the cover is not limiting and may be different, in particular greater than or equal to three.
  • the input member 24 and the cover 33 and, more particularly, the first and second plates 30, 32 can be held together by means of fixing elements by elastic snap-fastening.
  • the output device 25 is configured to be connected to the screen 2 of the concealment device 3.
  • the input member 24 and the output member 25 are made of plastic material.
  • the cover 33 is made of plastic material.
  • the plastic material of the inlet member 24, of the outlet member 25 and of the cover 33 can be poly-butylene terephthalate, also called PBT, or poly-acetal, also called Pom.
  • the output member 25 can be made of zamac (acronym of the names of the metals that compose it: zinc, aluminum, magnesium and copper).
  • the drum 23 is made of steel, in particular of sintered steel.
  • the use of sintered steel to make the drum 23 makes it possible to reduce the resistance to friction of the helical spring 22 against the internal friction surface 27 of the housing 26 of the drum 23.
  • the left and right sides of the figure 9 are reversed relative to the left and right sides of the figure 10 .
  • the coil spring 22, the input member 24 and the output member 25 are arranged around the drum 23, in an assembled configuration of the spring brake 15.
  • the friction surface 27 of the drum 23 is an outer surface of the drum 23.
  • the outer surface 27 of the drum 23, called the friction surface cooperates, in other words is configured to cooperate, with at least one turn of the helical spring 22, in the assembled configuration of the spring brake 15.
  • the helical spring 22 is mounted tightening around the drum 23, so as to secure by friction the helical spring 22 and the drum 23, when the helical spring 22 is at rest, as illustrated in figure 10 .
  • each of the first and second legs 29a, 29b of the coil spring 22 extends radially relative to the axis of rotation X and, in particular, towards the outside of the coil spring 22.
  • the drive tooth 31 of the input member 24 is arranged outside the coil spring 22, in the assembled configuration of the spring brake 15.
  • the frictional force between at least one turn of the coil spring 22 and the outer surface 27 of the drum 23 is reduced when the rotational drive of the coil spring 22 in the first direction of rotation.
  • this movement tends to increase the diameter of the internal envelope of the coil spring 22 and therefore to decrease the radial stress between the coil spring 22 and the outer surface 27 of the drum 23.
  • the friction force between at least one turn of coil spring 22 and outer surface 27 of housing 26 of drum 23 is increased when coil spring 22 is driven in rotation in the second direction of rotation.
  • this movement tends to reduce the diameter of the internal envelope of the coil spring 22, in particular by bringing together the first and second legs 29a, 29b of the coil spring 22, and therefore to increase the radial stress between the coil spring 22 and the outer surface 27 of the housing 26 of the drum 23.
  • the ear 39a, 39b and, more particularly, the first and second ears 39a, 39b of the output member 25 are arranged, in other words configured to be arranged, outside the coil spring 22, in the assembled configuration of the spring brake 15.
  • the housing 26 of the drum 23 is assembled, in other words is configured to be assembled, around a shaft 45 of the cover 33, in the assembled configuration of the spring brake 15.
  • the shaft 45 of the cover 33 makes it possible to support the drum 23, in the assembled configuration of the spring brake 15.
  • the first shaft 49 is inserted, on the one hand, into the bore 50 of the output member 25 in the assembled configuration of the spring brake 15 and, on the other hand, is part integral with the input member 24, so that the first shaft 49 and the input member 24 form a single piece.
  • the second shaft 37 is an integral part of the first shaft 49, so that the second shaft 37 and the first shaft 49 form a single piece.
  • connection between the input member 24 and the output member 25 is implemented by means of a housing 50 of the output member 25 cooperating, in other words being configured to cooperate, with the second shaft 37 of input member 24, in the assembled configuration of spring brake 15.
  • the housing 50 of the output member 25 is made by means of a bore, placed in the center of the output member 25 and, more particularly, centered with respect to the axis of rotation X , in the assembled configuration of the spring brake 15.
  • the second shaft 37 of the input member 24 is made in the form of a pin, arranged in alignment with the first shaft 49. The pin 37 of the input member 24 is therefore also centered with respect to the axis of rotation X, in the assembled configuration of the spring brake 15.
  • pin 37 of input member 24 is inserted into housing 50 of output member 25.
  • the output member 25 is centered with respect to the input member 24, by means of the housing 50 of the output member 25 and the pin 37 of the input member 24.
  • the coil spring 22 and the input member 24 are held in position axially between the output member 25 and the second plate 32 of the cover 33.
  • a dihedral-shaped recess 40 is delimited by two bearing surfaces 46, 47 inclined with respect to the axis of rotation X of the spring brake 15 on each of the lugs 39a, 39b.
  • the recesses 40 receive the first and second legs 29a, 29b of the coil spring 22, in the assembled configuration of the spring brake 15.
  • the angle of inclination of the first bearing surface of the recess of the output member with respect to the axis of rotation of the spring brake allows to prevent the turns of the helical spring from separating from each other, during a braking phase of the spring brake, and, more particularly, of a first turn of the helical spring from a following turn of the spring helical, during a braking phase of the spring brake, as well as to reduce the operating noises of the spring brake, during the rotational drive of the input member and/or of the output member relative to the drum.
  • the angle of inclination of the first bearing surface of the recess of the output member with respect to the axis of rotation of the spring brake makes it possible to guarantee a lateral force on one of the first and second legs of the coil spring, so as to maintain the contiguous turns of the coil spring, during a braking phase of the spring brake.
  • the electronic control unit 44 is arranged outside the casing 13 of the electromechanical actuator 11 and, in particular, mounted on the frame 20 or in the torque support 19.
  • connection between the input member 24 and the output member 25 is not implemented by means of the first shaft 49 but by means of a housing of the input member 24 cooperating, in other words being configured to cooperate, with a second shaft 37 of the output member 25, in the assembled configuration of the spring brake 15.
  • the housing of the input member 24 is made at the means of a bore, placed at the center of the input member 24 and, more particularly, centered with respect to the axis of rotation X, in the assembled configuration of the spring brake 15.
  • the output 25 comprises a pin, arranged in alignment with the shaft 37. The pin of the output member 25 is therefore also centered with respect to the axis of rotation X, in the assembled configuration of the spring brake 15.
  • the pin of the output member 25 is inserted into the housing of the input member 24. In this way, the output member 25 is centered p ar relative to the input member 24, by means of the housing of the input member 24 and the pin of the output member 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Braking Arrangements (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
EP19791263.7A 2018-10-26 2019-10-25 Actionneur électromécanique et installation domotique comprenant un tel actionneur Active EP3870796B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1859917A FR3087817B1 (fr) 2018-10-26 2018-10-26 Actionneur electromecanique et installation domotique comprenant un tel actionneur
PCT/EP2019/079130 WO2020084103A1 (fr) 2018-10-26 2019-10-25 Actionneur électromécanique et installation domotique comprenant un tel actionneur

Publications (2)

Publication Number Publication Date
EP3870796A1 EP3870796A1 (fr) 2021-09-01
EP3870796B1 true EP3870796B1 (fr) 2022-09-07

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EP19791263.7A Active EP3870796B1 (fr) 2018-10-26 2019-10-25 Actionneur électromécanique et installation domotique comprenant un tel actionneur

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US (1) US11293225B2 (ko)
EP (1) EP3870796B1 (ko)
KR (1) KR102381573B1 (ko)
CN (1) CN112912585B (ko)
AU (1) AU2019363720B2 (ko)
FR (1) FR3087817B1 (ko)
WO (1) WO2020084103A1 (ko)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189412A (en) * 1921-11-25 1923-07-06 Alfred Coindet Improvements in and relating to blinds
JPS58143086A (ja) 1982-02-19 1983-08-25 ト−ソ−株式会社 ロ−ルブラインドのクラツチ装置
FR2610668B1 (fr) * 1987-02-09 1990-10-26 Feller Samuel Reducteur-frein notamment pour la manoeuvre de volets roulants et similaires
FR2614359B1 (fr) * 1987-04-24 1989-07-21 Simu Soc Ind Metal Usine Mecanisme reducteur a deux vitesses pour la commande des dispositifs de fermeture a luminosite reglable, du genre des stores orientables et similaires
US6164428A (en) * 1999-08-23 2000-12-26 Joel Berman Associates, Inc. Wrap spring shade operator
KR100695819B1 (ko) * 2004-11-30 2007-03-20 테크노게이트 주식회사 전동식 커튼
FR2943379B1 (fr) * 2009-03-17 2011-04-08 Somfy Sas Frein a ressort pour actionneur d'entrainement d'un ecran domotique et actionneur equipe d'un tel frein
FR2946997B1 (fr) * 2009-06-23 2011-07-08 Somfy Sas Actionneur electrique d'entrainement d'un ecran domotique
FR2995001B1 (fr) * 2012-09-05 2014-09-26 Somfy Sas Actionneur electromecanique d'entrainement d'un ecran domotique
KR20140111909A (ko) * 2013-03-11 2014-09-22 (주)테라솔라 중첩된 양방향 클러치 어셈블리 및 이를 이용한 회전축 구동장치
CN109113555B (zh) * 2013-03-15 2020-06-09 亨特道格拉斯公司 用于辊支撑的建筑覆盖件的位置锁定
CN103746510B (zh) * 2013-12-20 2017-01-11 宁波杜亚机电技术有限公司 静音电机制动结构
FR3022289B1 (fr) * 2014-06-17 2016-06-03 Somfy Sas Actionneur electromecanique et installation domotique comprenant un tel actionneur
CN204419000U (zh) * 2014-09-19 2015-06-24 殷平生 一种弹簧助力装置和电动卷帘
FR3065250B1 (fr) * 2017-04-14 2019-07-05 Somfy Sas Procedes de fabrication d'un tambour et d'un frein a ressort d'un actionneur electromecanique, actionneur electromecanique et installation domotique associes
FR3074516B1 (fr) * 2017-12-01 2019-11-22 Somfy Activites Sa Actionneur electromecanique et installation domotique comprenant un tel actionneur

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Publication number Publication date
EP3870796A1 (fr) 2021-09-01
WO2020084103A1 (fr) 2020-04-30
KR20210056429A (ko) 2021-05-18
AU2019363720A1 (en) 2021-04-29
US20210310305A1 (en) 2021-10-07
CN112912585A (zh) 2021-06-04
AU2019363720B2 (en) 2021-07-22
FR3087817B1 (fr) 2020-11-13
CN112912585B (zh) 2022-01-07
US11293225B2 (en) 2022-04-05
KR102381573B1 (ko) 2022-04-04
FR3087817A1 (fr) 2020-05-01

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