Electromechanical actuator for a screening device, and screening device comprising such an electromechanical actuator

Abstract

Disclosed is an electromechanical actuator comprising an electric motor, a coupling element and a monostable clutch (23a). The clutch (23a) comprises a central shaft (43), a mobile member (44) and a coil (45), which generates a magnetic field when this coil is powered, so as to cause the member (44) to move relative to the shaft (43). The shaft (43) comprises a core (46), a ring gear (47) and a ring (52), arranged between the core (46) and the ring gear (47). The core (46) and the ring gear (47) are in contact with the member (44) only in a second position, so as to rotate the shaft (43) as a result of grip. Furthermore, the supply to the coil (45) is implemented continuously, only while the member (44) is moving between a first position and the second position, and while the member (44) is being held in the second position.

Description

[0001] Electromechanical actuator for a shading device and shading device comprising such an electromechanical actuator

[0002] The present invention relates to an electromechanical actuator for a blackout device, in other words an electromechanical actuator of a blackout device.

[0003] The present invention also relates to a blackout device comprising a screen driven in movement by such an electromechanical actuator.

[0004] In general, the present invention relates to the field of blackout devices comprising a motorized drive device moving a screen, between at least a first position and at least a second position and, optionally, between at least a third position and at least a fourth position.

[0005] More specifically, the present invention relates to the field of shading devices comprising at least one screen, a first movable bar, a second movable bar, and a motorized drive device. In an assembled configuration of the shading device, the first movable bar is positioned between the upper part of a window or door and the second movable bar. The second movable bar is positioned between the first movable bar and the lower part of the window or door. The screen is positioned between the first and second movable bars. The screen is configured to be driven by the motorized drive device.The motorized drive device sets in motion, on the one hand, the first movable bar connected to the screen, between at least a first position and at least a second position, and, on the other hand, the second movable bar connected to the screen, between at least a third position and at least a fourth position.

[0006] A motorized drive device includes an electromechanical actuator of a movable shading or sun protection element, such as a blind or any other equivalent material, hereafter referred to as a screen.

[0007] We already know of document WO 2021 / 123176 A1, which describes an electromechanical actuator for a blinding device. The electromechanical actuator comprises an electric motor, a first coupling element, a second coupling element, a first clutch, and a second clutch. The first clutch is engaged or disengaged so as to lock or unlock the first coupling element in rotation with respect to the electric motor. The second clutch is engaged or disengaged so as to lock or unlock the second coupling element in rotation with respect to the electric motor. Each of the first and second clutches comprises a central shaft, a moving part, and a coil. The moving part is free to move in translation relative to the central shaft, between a first position and a second position, along a direction of rotation of the first or second clutch.The first position is a disengaged position of either the first or second clutch, and the second position is an engaged position of either the first or second clutch. When electrically powered, the coil generates a magnetic field, causing the moving part to move relative to the central shaft between the first and second positions. This electromechanical actuator generally performs satisfactorily.

[0008] However, this electromechanical actuator has the disadvantage that the first and second clutches are of the bistable type.

[0009] Therefore, each of the first and second clutches comprises a significant number of components and a complex construction, resulting in a high acquisition cost.

[0010] In addition, the connection between the central shaft and the moving part for engaging or disengaging each of the first and second clutches is implemented by means of dog clutches.

[0011] Consequently, this connection between the central shaft and the moving part generates, unintentionally, a blockage of each of the first and second clutches when moving from the second position to the first position.

[0012] Furthermore, the electrical power supply to the coil of each of the first and second clutches is implemented by an electrical impulse to move the moving part in translation relative to the central shaft, between the first position and the second position, and vice versa.

[0013] Therefore, the value of an electric current of the electrical impulse, necessary to move the moving part from its first position to its second position, or vice versa, is high.

[0014] The present invention aims to resolve the aforementioned drawbacks and to provide an electromechanical actuator for a shuttering device, as well as a shuttering device comprising such an electromechanical actuator, allowing the construction of a clutch to be simplified, so as to improve its operational reliability.

[0015] In this respect, the present invention relates, according to a first aspect, to an electromechanical actuator for a blackout device, the electromechanical actuator comprising at least:

[0016] - an electric motor, - a first coupling element, and

[0017] - a first clutch, the first clutch being engaged or disengaged, so as to lock or unlock, at least in rotation, the first coupling element with respect to the electric motor, the first clutch comprising at least:

[0018] - a central tree,

[0019] - a moving part, the moving part being movable in translation relative to the central shaft, between a first position and a second position, along a direction of an axis of rotation of the first clutch, the first position being a disengaged position of the first clutch and the second position being an engaged position of the first clutch, and

[0020] - a coil, the coil generating a magnetic field, when it is supplied with electrical energy, so as to cause a displacement of the moving part relative to the central shaft, between the first position and the second position.

[0021] According to the invention, the first clutch is of the monostable type.

[0022] The central tree includes at least:

[0023] - a nucleus,

[0024] - a crown, and

[0025] - a ring, the ring being positioned between the core and the crown, in a direction radial to the axis of rotation.

[0026] The core and the crown are in contact with the moving part only in the second position, so as to drive the central shaft in rotation by the moving part, around the axis of rotation, by adhesion.

[0027] In addition, the electrical power supply to the coil is implemented continuously, only when the moving part is moving relative to the central shaft, between the first and second positions and when the moving part is held in position relative to the central shaft in the second position.

[0028] Thus, the construction of the first clutch is simplified, notably by minimizing the number of components, in order to improve its operational reliability.

[0029] In this way, the cost of obtaining the first clutch and, consequently, the electromechanical actuator is minimized.

[0030] Furthermore, the connection between the central shaft and the moving part for engaging or disengaging the first clutch is achieved through friction. Consequently, this connection between the central shaft and the moving part prevents the first clutch from locking up unexpectedly when shifting from second to first gear.

[0031] Furthermore, the electrical power supply to the coil of the first clutch is implemented continuously to move the moving part in translation relative to the central shaft, between the first position and the second position, and to maintain the moving part in position relative to the central shaft in the second position.

[0032] Therefore, the value of an electric current from the electrical power supply to the coil is reduced.

[0033] According to an advantageous feature of the invention, the core and the ring are made of a magnetic material. Furthermore, the ring is made of a non-magnetic material, so as to guide the flow of a magnetic flux generated by the coil through the moving part and to prevent the flow of magnetic flux directly between the core and the ring.

[0034] According to another advantageous feature of the invention, the first clutch further comprises a cylinder head. The cylinder head is made of a magnetic material. Moreover, when the coil is supplied with electrical energy, the magnetic flux is channeled into the cylinder head, the core, the ring gear, and the moving member, so as to cause the moving member to move relative to the central shaft between the first and second positions.

[0035] According to another advantageous feature of the invention, in the first position, a non-zero axial air gap is present between, on the one hand, the core and the ring and, on the other hand, the moving member, along the direction of the axis of rotation. Furthermore, in the second position, the core and the ring are pressed against the moving member, along the direction of the axis of rotation.

[0036] According to another advantageous feature of the invention, the central shaft further comprises a first bore. The first clutch further comprises a piston and a spring return element, the piston and spring return element being mounted inside the first bore of the central shaft. Furthermore, the spring return element exerts a force against the piston, and when the coil is not energized, the piston presses against the moving part, so as to hold the moving part in the first position or to move the moving part translationally from the second position to the first position, along the direction of the axis of rotation.

[0037] According to another advantageous feature of the invention, the moving part further comprises a second bore. The piston further comprises a centering pin. Moreover, the piston's centering pin is inserted into the second bore of the moving part.

[0038] The present invention relates, according to a second aspect, to a blocking device, the blocking device comprising at least:

[0039] - a screen, the screen comprising a first end and a second end, the second end being opposite the first end,

[0040] - a first movable bar, the first end of the screen being connected to the first movable bar, and

[0041] - a motorized drive device, the motorized drive device being configured to drive the screen in motion, the motorized drive device comprising at least:

[0042] - an electromechanical actuator according to the invention and as mentioned above, the electromechanical actuator being configured to drive the first moving bar in motion.

[0043] This obscuring device has characteristics and advantages similar to those described previously, in relation to the electromechanical actuator according to the invention.

[0044] According to another advantageous feature of the invention, the obscuring device further comprises:

[0045] - a first cord or a first chain,

[0046] - a second cord or a second chain,

[0047] - a first drive arrangement, the first drive arrangement being configured to cooperate with the first cord or chain, and

[0048] - a second drive arrangement, the second drive arrangement being configured to cooperate with the second cord or second chain.

[0049] In addition, the electromechanical actuator is configured to drive the first moving bar by means of the first and second cords or chains.

[0050] According to another advantageous feature of the invention, the blackout device further comprises a second movable bar, the second end of the screen being connected to the second movable bar.

[0051] The electromechanical actuator also includes:

[0052] - a second coupling element, and

[0053] - a second clutch, the second clutch being engaged or disengaged, so as to connect or disconnect, at least in rotation, the second coupling element with respect to the electric motor, the second clutch being identical to the first clutch.

[0054] In addition, the electromechanical actuator is configured to drive the second moving bar.

[0055] According to another advantageous feature of the invention, the obscuring device further comprises:

[0056] - a third cord or a third chain,

[0057] - a fourth cord or a fourth chain,

[0058] - a third drive arrangement, the third drive arrangement being configured to cooperate with the third cord or the third chain, and

[0059] - a fourth drive arrangement, the fourth drive arrangement being configured to cooperate with the fourth cord or the fourth chain.

[0060] In addition, the electromechanical actuator is configured to drive the second moving bar by means of the third and fourth cords or chains.

[0061] Other features and advantages of the invention will become apparent in the following description, made with reference to the attached drawings, given by way of non-limiting examples and in which:

[0062] [Fig 1] Figure 1 is a schematic perspective view of an installation comprising a blackout device according to an embodiment of the invention; [Fig 2] Figure 2 is a schematic perspective view of an electromechanical actuator of a motorized drive device of the blackout device illustrated in Figure 1, where a cover has been removed;

[0063] [Fig 3] Figure 3 is a schematic exploded and perspective view of a clutch of the electromechanical actuator illustrated in Figure 2;

[0064] [Fig 4] Figure 4 is a schematic cross-sectional view of the clutch illustrated in Figure 3, in a disengaged position;

[0065] [Fig 5] Figure 5 is a view analogous to Figure 4, where the clutch is in an engaged position;

[0066] [Fig 6] Figure 6 is a schematic perspective view of a central shaft of the clutch illustrated in Figures 3 to 5;

[0067] [Fig 7] Figure 7 is a schematic front view of a clutch coil illustrated in Figures 3 to 5; and [Fig 8] Figure 8 is a schematic perspective view of a coil support illustrated in Figure 7.

[0068] First, with reference to Figure 1, we describe an installation 1 comprising a closure, shading, or solar protection device 3 according to an embodiment of the invention. This installation 1, installed in a building (not shown), includes an opening (not shown) in which a window or door (not shown) is located. This installation 1 is equipped with a screen 2 belonging to the closure, shading, or solar protection device 3, in particular a motorized blind. The screen 2 is configured to at least partially obscure the opening in a wall of the building.

[0069] The closing, shading, or sun protection device 3 is hereinafter referred to as the "shading device." The shading device 3 comprises the screen 2.

[0070] Here, screen 2 can be formed, for example, from a pleated or honeycomb fabric or from blades that can be oriented.

[0071] The screen 2 includes a first end 2a, in particular an upper end, and a second end 2b, in particular a lower end, the second end 2b being opposite the first end 2a.

[0072] With reference to figure 1, a blind conforming to the embodiment of the invention is described.

[0073] The occultation device 3 includes a first movable bar 8a, in particular an upper movable bar. The first end 2a of the screen 2 is connected to the first movable bar 8a.

[0074] Here, the occultation device 3 further includes a second movable bar 8b, specifically a lower movable bar. The second end 2b of the screen 2 is connected to the second movable bar 8b.

[0075] Thus, screen 2 is positioned, or rather configured to be deployed, between the first and second moving bars 8a, 8b. Depending on the relative position of the first and second moving bars 8a, 8b, screen 2 is more or less deployed.

[0076] Here, the second movable bar 8b is identical to the first movable bar 8a.

[0077] As an alternative, not shown, the second movable bar 8b is different from the first movable bar 8a.

[0078] The blackout device 3 includes a motorized drive device 5. The motorized drive device 5 is configured to drive, in other words, drives, the screen 2.

[0079] Advantageously, the shading device 3 further includes a housing 7. Here, the motorized drive device 5 is mounted, that is to say, housed, in the housing 7, in particular in an assembled configuration of the shading device 3.

[0080] More specifically, the housing 7 is mounted, or rather configured to be mounted, in the upper part or above the opening, particularly in an assembled configuration of the shading device 3 in installation 1. The housing 7 is generally called a rail and, more specifically, a top rail.

[0081] Advantageously, the housing 7 includes at least one bottom wall 7a and two side walls 7b.

[0082] Here, each of the side walls 7b is connected to the bottom wall 7a of the housing 7. In addition, each of the side walls 7b is perpendicular to the bottom wall 7a of the housing 7.

[0083] In other words, case 7 has a "U" shaped cross-section.

[0084] The housing 7 comprises a first end 7c and a second end 7d. The second end 7d is opposite the first end 7c.

[0085] The motorized drive device 5 includes at least one electromechanical actuator 11.

[0086] Here, the electromechanical actuator 11 is mounted, in other words is housed, inside the casing 7, in particular in the assembled configuration of the occulting device 3.

[0087] Advantageously, the electromechanical actuator 11 comprises a first end 11a and a second end 11b, the second end 11b being opposite the first end 11a.

[0088] Here, in installation 1, an upper limit position corresponds to a position in which the first moving bar 8a can no longer move upwards, particularly when approaching the housing 7. The upper limit position can be either predetermined or correspond to the first moving bar 8a pressing against the housing 7. Furthermore, a lower limit position corresponds to a position in which the second moving bar 8b can no longer move downwards, particularly when moving away from the housing 7 or the first moving bar 8a. The lower limit position can be either predetermined or correspond to the second moving bar 8b pressing against a threshold of the opening, or correspond to the complete extension of the screen 2.

[0089] Advantageously, the motorized drive device 5 further comprises at least one drive shaft 9a, 9b. In addition, the electromechanical actuator 11 is configured to drive the drive shaft 9a, 9b in rotation, so as to move one or both of the first and second movable bars 8a, 8b. Here, the motorized drive device 5 comprises a first drive shaft 9a and a second drive shaft 9b. The electromechanical actuator 11 is configured to drive the first drive shaft 9a in rotation, so as to move the first movable bar 8a. In addition, the electromechanical actuator 11 is configured to drive the second drive shaft 9b in rotation, so as to move the second movable bar 8b.

[0090] Advantageously, the first and second drive shafts 9a, 9b are parallel to each other.

[0091] Here, the first and second drive shafts 9a, 9b are located on the same side of the electromechanical actuator 11, as illustrated in Figure 1.

[0092] Advantageously, the shading device 3 comprises a first cord 4a, a second cord 4b, a first drive arrangement 6a, and a second drive arrangement 6b. The first drive arrangement 6a is configured to cooperate with the first cord 4a. The second drive arrangement 6b is configured to cooperate with the second cord 4b. Furthermore, the electromechanical actuator 11 is configured to drive the first moving bar 8a via the first and second cords 4a and 4b.

[0093] Advantageously, the first drive arrangement 6a is configured to wind and unwind, i.e., winds and unwinds, the first cord 4a. Furthermore, the second drive arrangement 6b is configured to wind and unwind, i.e., winds and unwinds, the second cord 4b.

[0094] Thus, when the first and second cords 4a, 4b are wound by means of the first and second drive arrangements 6a, 6b, the first movable bar 8a is raised towards the housing 7. Furthermore, when the first and second cords 4a, 4b are unwound by means of the first and second drive arrangements 6a, 6b, the first movable bar 8a is lowered away from the housing 7.

[0095] Advantageously, each of the first and second cords 4a, 4b is attached to the first movable bar 8a.

[0096] Here, the occulting device 3 further comprises a third cord 4c, a fourth cord 4d, a third drive arrangement 6c, and a fourth drive arrangement 6d. The third drive arrangement 6c is configured to cooperate with the third cord 4c. Furthermore, the fourth drive arrangement 6d is configured to cooperate with the fourth cord 4d. In addition, the electromechanical actuator 11 is configured to drive the second moving bar 8b via the third and fourth cords 4c and 4d.

[0097] Advantageously, the third drive arrangement 6c is configured to wind and unwind, that is, winds and unwinds, the third cord 4c. Furthermore, the fourth drive arrangement 6d is configured to wind and unwind, that is, winds and unwinds, the fourth cord 4d.

[0098] Thus, when the third and fourth cords 4c, 4d are wound by means of the third and fourth drive arrangements 6c, 6d, the second movable bar 8b is raised towards the housing 7. Furthermore, when the third and fourth cords 4c, 4d are unwound by means of the third and fourth drive arrangements 6c, 6d, the second movable bar 8b is lowered away from the housing 7.

[0099] Advantageously, each of the third and fourth cords 4c, 4d is attached to the second movable bar 8b.

[0100] Thus, the first, second, third and fourth cords 4a, 4b, 4c, 4d connect the first and second drive shafts 9a, 9b to the first and second moving bars 8a, 8b.

[0101] In this way, the first, second, third and fourth cords 4a, 4b, 4c, 4d support screen 2.

[0102] Here, the third and fourth training arrangements 6c, 6d are respectively identical to the first and second training arrangements 6a, 6b.

[0103] The first, second, third and fourth drive arrangements 6a, 6b, 6c, 6d can also be referred to as first, second, third and fourth winders.

[0104] Advantageously, the first, second, third and fourth drive arrangements 6a, 6b, 6c, 6d each include at least one pulley configured to wind or unwind one of the first, second, third and fourth cords 4a, 4b, 4c, 4d.

[0105] Advantageously, the first and second drive arrangements 6a, 6b, respectively the third and fourth drive arrangements 6c, 6d, are mounted, in other words are housed, inside the casing 7, in particular in the assembled configuration of the occulting device 3.

[0106] The drive device 5 is thus configured to drive, in other words, to drive, in particular in a vertical direction, the first and second movable bars 8a, 8b of the shading device 3, via the first, second, third and fourth cords 4a, 4b, 4c, 4d, by means of the electromechanical actuator 11. Advantageously, the first and second movable bars 8a, 8b are parallel to each other, particularly in the assembled configuration of the shading device 3. Furthermore, the first and second drive shafts 9a, 9b are parallel to the first and second movable bars 8a, 8b, particularly in the assembled configuration of the shading device 3.

[0107] In an alternative, not shown, the first drive shaft 9a is coupled to the second moving bar 8b and the second drive shaft 9b is coupled to the first moving bar 8a, instead of the first drive shaft 9a being coupled to the first moving bar 8a and the second drive shaft 9b being coupled to the second moving bar 8b, as explained above.

[0108] Advantageously, the motorized drive device 5 and, more particularly, the electromechanical actuator 11 is controlled by a control unit. The control unit can be, for example, a local control unit 12 or a central control unit 13.

[0109] Advantageously, the local control unit 12 can be connected, via wired or wireless connection, to the central control unit 13.

[0110] Advantageously, the central control unit 13 can control the local control unit 12, as well as other similar local control units distributed throughout the building.

[0111] The motorized drive device 5 is preferably configured to execute movement commands, including deployment or retraction, of the screen 2, which may be issued, in particular, by the local control unit 12 or by the central control unit 13.

[0112] Installation 1 comprises either the local control unit 12, or the central control unit 13, or the local control unit 12 and the central control unit 13.

[0113] We now describe in more detail and with reference to figure 2 the motorized drive device 5, including the electromechanical actuator 11, belonging to the installation 1 and, more particularly, to the occulting device 3 illustrated in figure 1, according to the embodiment of the invention.

[0114] The electromechanical actuator 11 includes an electric motor 16. The electric motor 16 is represented by its casing in Figure 2, without details on its internal constituent elements.

[0115] Here, the electromechanical actuator 11 comprises a single electric motor 16. Advantageously, the electric motor 16 of the electromechanical actuator 11 comprises a rotor 21 and a stator, not shown, positioned coaxially around a rotation axis X16.

[0116] Advantageously, the electric motor 16 of the electromechanical actuator 11 can be of the electronically commutated brushless type, also called "BLDC" (acronym for the Anglo-Saxon term BrushLess Direct Current) or "permanent magnet synchronous", or of the direct current type.

[0117] Advantageously, the rotor 21 of the electric motor 16 comprises a first end, not shown, i.e., a first output, and a second end 21b, i.e., a second output. The second end 21b is opposite the first end.

[0118] Control means for the electromechanical actuator 11, enabling the movement of the screen 2, include at least one control unit 15, in particular an electronic control unit, shown in Figure 2.

[0119] Here, the electromechanical actuator 11 further includes the control unit 15.

[0120] Alternatively, not shown, the control unit 15 is located outside the electromechanical actuator 11 and, for example, is located inside the housing 7. In this case, the control unit 15 is electrically connected at least to the electric motor 16 via an electrical connection.

[0121] The control unit 15 is capable of starting the electric motor 16 and, in particular, of enabling the supply of electrical energy to the electric motor 16.

[0122] Thus, the control unit 15 commands, in particular, the electric motor 16, so as to deploy or fold the screen 2 and, more particularly, so as to raise or lower the first movable bar 8a and, consequently, the upper part of the screen 2, and so as to raise or lower the second movable bar 8b and, consequently, the lower part of the screen 2.

[0123] Advantageously, the control unit 15 includes hardware and / or software means.

[0124] By way of non-limiting example, the material means of the control unit 15 include at least one microcontroller 31.

[0125] Advantageously, the control unit 15 further includes a first communication module 27, in particular for receiving control orders, the control orders being issued by an order transmitter, such as the local control unit 12 or the central control unit 13, these orders being intended to control the electromechanical actuator 11.

[0126] Advantageously, the first communication module 27 is wireless. In particular, the first communication module 27 is configured to receive radio control commands.

[0127] As an alternative or in addition, the first communication module 27 can allow the reception of command orders transmitted by wired means.

[0128] Advantageously, the control unit 15, the local control unit 12 and / or the central control unit 13 can be in communication with a weather station, not shown, located inside the building or outside the building, including, in particular, one or more sensors that can be configured to determine, for example, a temperature, a brightness, or a wind speed, in the case where the weather station is located outside the building.

[0129] Advantageously, the control unit 15, the local control unit 12 and / or the central control unit 13 can also be in communication with a server 28, so as to control the motorized drive device 5 and, more particularly, the electromechanical actuator 11, according to data made available remotely via a communication network, in particular an Internet network that can be connected to the server 28.

[0130] Control unit 15 can be controlled from the local control unit

[0131] 12 or the central control unit 13. The local control unit 12 or the central control unit 13 is equipped with a control keypad. The control keypad includes one or more selection elements 14 and, optionally, one or more display elements 34.

[0132] By way of example, and not limited to these examples, selection elements may include push buttons and / or touch-sensitive keys. Display elements may include light-emitting diodes and / or a display, for example LCD (Liquid Crystal Display) or TFT (Thin Film Transistor). Selection and display elements may also be implemented using a touchscreen.

[0133] Advantageously, the local control unit 12 or the central control unit

[0134] 13 includes, in addition, at least one second communication module 36.

[0135] Thus, the second communication module 36 is configured to transmit, in other words, sends out, command orders, in particular by wireless means, for example radioelectric, or by wired means.

[0136] Furthermore, the second communication module 36 can also be configured to receive commands, in particular via the same means. Advantageously, the second communication module 36 of the local control unit 12 or the central control unit 13 is configured to communicate with the first communication module 27 of the control unit 15.

[0137] Thus, the second communication module 36 of the local control unit 12 or of the central control unit 13 exchanges control orders with the first communication module 27 of the control unit 15, either unidirectionally or bidirectionally.

[0138] Advantageously, the local control unit 12 is a control point, which can be fixed or mobile. A fixed control point can be a control box intended to be mounted on a building wall or on the face of a window or door frame. A mobile control point can be a remote control, a smartphone, or a tablet.

[0139] Advantageously, the local control unit 12 or the central control unit 13 further includes a controller 35.

[0140] The motorized drive device 5, in particular the control unit 15, is preferably configured to execute command commands for movement, including retraction and deployment, of the screen 2. These command commands can be issued, in particular, by the local control unit 12 or by the central control unit 13.

[0141] The motorized drive device 5 can be controlled by the user, for example by receiving a command order corresponding to a press on the or one of the selection elements 14 of the local control unit 12 or of the central control unit 13.

[0142] Advantageously, installation 1 also includes at least one sensor, not shown.

[0143] Advantageously, the sensor includes at least one second communication module 36, such as that described with reference to the local control unit 12 or the central control unit 13. In addition, the second communication module 36 of the sensor is configured to communicate, that is to say, communicates, with the first communication module 27 of the control unit 15.

[0144] Advantageously, the sensor can be, for example, a light sensor, a temperature sensor, a humidity sensor or a wind sensor.

[0145] Thus, the motorized drive unit 5 can also be automatically controlled by receiving a command corresponding to at least one signal from the sensor. Alternatively, the motorized drive unit 5 can also be automatically controlled by receiving a command corresponding to at least one signal from a clock (not shown) of the control unit 15, in particular the microcontroller 31.

[0146] In addition or as an alternative, the sensor and / or the clock can be integrated into the local control unit 12 or the central control unit 13.

[0147] Advantageously, the electromechanical actuator 11 further comprises a housing 17, in particular of parallelepiped shape.

[0148] Advantageously, the electric motor 16 is mounted, in other words is housed, inside the casing 17, particularly in an assembled configuration of the electromechanical actuator 11.

[0149] Advantageously, the housing 17 comprises a first end 17a and a second end 17b, the second end 17b being opposite the first end 17a.

[0150] The first end 17a of the housing 17 is oriented towards the side of the first end 11a of the electromechanical actuator 11, while the second end 17b of the housing 17 is oriented towards the side of the second end 11b of the electromechanical actuator 11. The viewing angles of figures 1 and 2 are opposite.

[0151] Here, the housing 17 is made of a plastic material.

[0152] The material of the casing is not limited and can be different. In particular, it can be a metallic material.

[0153] Advantageously, the housing 17 comprises a base 17c and a cover 17d, which is shown only in Figure 1. In addition, the cover 17d is fixed, or rather configured to be fixed, to the base 17c by means of fixing elements, not shown, particularly in the assembled configuration of the electromechanical actuator 11.

[0154] Here, the fasteners are fixing screws, specifically six of them. The fixing screws pass through through holes (not shown) in the cover 17d and are screwed into screw holes 18 in the base 17c. The number of through holes and the number of screw holes are equal to the number of fixing screws. Only three of the screw holes 18 are visible in Figure 2.

[0155] The type and number of fasteners are not limited and may vary. They may include, for example, elastic snap fasteners or a combination of different fasteners, including screw and elastic snap fasteners.

[0156] Here, the control unit 15 comprises a first and a second electronic board 30. Advantageously, each of the first and second electronic boards 30 is mounted, in other words is housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0157] Advantageously, the first electronic board 30 is configured to control the electric motor 16. Furthermore, the second electronic board 30 is configured to, among other things, access parameter settings and / or configuration functions of the electromechanical actuator 11, by means of selection and, optionally, display devices, not shown. In addition, the second electronic board 30 is configured to allow the charging of a rechargeable battery 24.

[0158] Alternatively, not shown, the control unit 15 comprises a single electronic board 30. Advantageously, in this case, the single electronic board 30 is mounted, in other words is housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0159] The electromechanical actuator 11 is powered by electrical energy from an electrical power supply source 29.

[0160] Advantageously, the electrical power supply source 29 is constituted by the battery 24. The battery 24 is represented by its casing in Figure 1, without details on its internal constituent elements.

[0161] Thus, the battery 24 is configured to supply electrical energy, in other words supplies electrical energy, to the electromechanical actuator 11 and, more particularly, to the electric motor 16, as well as to the control unit 15.

[0162] Advantageously, the battery 24 is mounted, in other words is housed, inside the casing 7, particularly in the assembled configuration of the occultation device 3.

[0163] Here, the motorized drive unit 5 also includes the battery 24.

[0164] Alternatively, not shown, the battery 24 is mounted, in other words is housed, in the casing 17, in particular in the assembled configuration of the electromechanical actuator 11, which itself is mounted inside the housing 7, in particular in the assembled configuration of the occulting device 3.

[0165] In another variant, not shown, the battery 24 is mounted outside the housing 7, in particular in the assembled configuration of the blackout device 3. In this case, the battery 24 can be fixed against one of the side walls 7b of the housing 7, in particular by means of at least one fixing element, such as, for example, at least one retaining bracket, while being disposed outside the housing 7.

[0166] Advantageously, the battery 24 includes one or more electrical energy storage elements, not shown. The electrical energy storage elements may be, in particular, accumulators, in the case shown in the figures where the battery 24 is of the rechargeable type, or cells, in the case not shown where the battery 24 is not rechargeable and where the second electronic board 30 is not used to recharge it.

[0167] Advantageously, the control unit 15 includes charging elements configured to charge the battery 24 from electrical energy supplied by an external power source, not shown. The charging elements include, at least, an electrical connector, not shown, in the case where the battery 24 is of the rechargeable type. The external power source is configured to be electrically connected to the electrical connector via a power cable, not shown.

[0168] Advantageously, the external electrical power supply source is a charger, which can be plugged into a wall outlet, so as to recharge the battery 24, from an electrical power supply network, in particular from the mains.

[0169] Alternatively, the external electrical power supply source can be an auxiliary battery or a photovoltaic panel.

[0170] Alternatively, and not shown, the electrical power supply 29 consists of an electrical power supply network, in particular mains power or "PoE" (acronym for Power over Ethernet). In this case, the motorized drive unit 5 also includes a transformer, either in addition to or as a replacement for the battery 24.

[0171] Advantageously, the motorized drive device 5 further includes a power supply cable 37. In addition, the power supply cable 37 supplies electrical energy, in other words, is configured to supply electrical energy, to the electromechanical actuator 11 from the power supply source 29. In other words, the electromechanical actuator 11 is electrically connected to the power supply source 29 and, more particularly, to the battery 24 or the transformer, via the power supply cable 37.

[0172] Here, the power supply cable 37 includes an electrical connector 38, which is arranged at one of its ends, as illustrated in Figure 1, to connect with an electrical connector 39 of the power supply source 29, in this case the battery 24.

[0173] Alternatively, not shown, the power supply cable 37 includes an electrical connector at each end, on the one hand, to connect with an electrical connector 39 of the power supply 29 and, on the other hand, to connect with an electrical connector of the electromechanical actuator 11. Alternatively, not shown, the power supply cable 37 is a flat cable, in other words a flat cable, provided with electrical connectors, in particular of the RJ45 type (acronym for the Anglo-Saxon term "Registered Jack"), in the case where the electromechanical actuator 11 is powered by electrical energy from the battery 24 or, possibly, from a power supply network known as "PoE".

[0174] Alternatively, not shown, the power supply cable 37 is a cord, in the case where the electromechanical actuator 11 is supplied with electrical energy from a mains power supply network, which may have, for example, a supply voltage of 110 Volts or 230 Volts.

[0175] Advantageously, the electromechanical actuator 11 is located at the first end 7c of the housing 7. The battery 24 and / or the transformer is located at the second end 7d of the housing 7.

[0176] The electromechanical actuator 11 further comprises at least one coupling element 20a, 20b, in other words an output shaft.

[0177] Here, the electromechanical actuator 11 includes a first coupling element 20a, in other words a first output shaft, and a second coupling element 20b, in other words a second output shaft.

[0178] Thus, the electromechanical actuator 11 is a two-output electromechanical actuator.

[0179] Advantageously, the first and second coupling elements 20a, 20b are arranged at the first end 11a of the electromechanical actuator 11.

[0180] Thus, the two outputs of the electromechanical actuator 11 are arranged on the same side of the electromechanical actuator 11, in particular of the housing 17.

[0181] In addition, the first and second drive shafts 9a, 9b are arranged on the same side of the electromechanical actuator 11 as the first and second coupling elements 20a, 20b.

[0182] Advantageously, the first coupling element 20a is rotatable about a first axis of rotation Xa within the housing 7. The second coupling element 20b is rotatable about a second axis of rotation Xb within the housing 7. The first drive shaft 9a is fixed to the first coupling element 20a, which is rotatable about the first axis of rotation Xa, specifically at one end of the first coupling element 20a. Furthermore, the second drive shaft 9b is fixed to the second coupling element 20b, which is rotatable about the second axis of rotation Xb, specifically at one end of the second coupling element 20b.

[0183] Thus, the electric motor 16 is configured to drive in rotation, in other words drives in rotation, on the one hand, the first coupling element 20a, so as to drive in rotation the first drive shaft 9a, and, on the other hand, the second coupling element 20b, so as to drive in rotation the second drive shaft 9b.

[0184] Here, the first and second coupling elements 20a, 20b are arranged on the same side of the electric motor 16.

[0185] Here, the first and second coupling elements 20a, 20b are identical.

[0186] Advantageously, the first and second axes of rotation Xa, Xb are arranged in the same horizontal plane P. In this case, plane P is parallel to the lower wall 7a of the housing 7.

[0187] Alternatively, and not shown, the first and second axes of rotation Xa, Xb are arranged in the same vertical plane. In this case, the plane is perpendicular to the lower wall 7a of the housing 7.

[0188] In another variant, not shown, the first and second axes of rotation Xa, Xb are arranged in a staggered pattern along an oblique plane. In this case, the plane is inclined relative to the lower wall 7a of the housing 7 by a value between 0° and 90° or between 90° and 180°.

[0189] Regardless of the position of the first and second axes of rotation Xa, Xb relative to the housing 7, the first and second drive shafts 9a, 9b are arranged in the same way as the first and second coupling elements 20a, 20b relative to the housing 7.

[0190] Advantageously, the electromechanical actuator 11 further includes at least one reducer 19a, 19b.

[0191] Here, the electromechanical actuator 11 comprises a first reducer 19a and a second reducer 19b. Each of the first and second reducers 19a, 19b is represented by its envelope in figure 2, in particular by means of a housing 48 common to the first and second reducers 19a, 19b, without details on its internal constituent elements.

[0192] Each of the first and second reducers 19a, 19b comprises at least one reduction stage. The reduction stage may be, for example, an epicyclic gear train.

[0193] The type and number of reduction stages in each of the first and second reducers are not limited. The number of reduction stages can be, for example, three, but also two or four.

[0194] Advantageously, the first reducer 19a is configured to transmit, or rather, drives, motion generated by the electric motor 16 to the first coupling element 20a and, consequently, to the first drive shaft 9a. Furthermore, the second reducer 19b is configured to transmit motion generated by the electric motor 16 to the second coupling element 20b and, consequently, to the second drive shaft 9b.

[0195] Each of the first and second reducers 19a, 19b includes an input tree and an output tree, not shown.

[0196] Here, the input shaft of each of the first and second reducers 19a, 19b is a shaft of a solar pinion of a first stage of reduction.

[0197] Advantageously, the input shaft of each of the first and second reducers 19a, 19b has a non-circular cross-section.

[0198] Here, the input shaft of each of the first and second reducers 19a, 19b includes a flat.

[0199] The number of flats on the input shaft of each of the first and second reducers is not limited and can be different. It can be, for example, two or more.

[0200] Advantageously, the first and second reducers 19a, 19b are mounted, in other words are housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0201] Here, the first and second reducers 19a, 19b are identical.

[0202] The electromechanical actuator 11 further includes at least one clutch 23a, 23b.

[0203] Here, the electromechanical actuator 11 includes a first clutch 23a and a second clutch 23b.

[0204] Each of the first and second clutches 23a, 23b is of the monostable type.

[0205] Here, each of the first and second clutches 23a, 23b is a friction clutch, in other words, by adhesion.

[0206] Advantageously, the first and second clutches 23a, 23b are mounted, in other words are housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0207] Here, the first and second clutches 23a, 23b are identical. Thus, figures 3 to 8 represent one or the other of these clutches.

[0208] The first clutch 23a is configured to be engaged or disengaged, in other words, is engaged or disengaged, so as to connect or disconnect, at least in rotation, the first coupling element 20a and, consequently, the first drive shaft 9a with respect to the electric motor 16, in particular at the first end of the rotor 21 of the electric motor 16. Furthermore, the second clutch 23b is configured to be engaged or disengaged, in other words, is engaged or disengaged, so as to connect or disconnect, at least in rotation, the second coupling element 20b and, consequently, the second drive shaft 9b with respect to the electric motor 16, in particular at the first end of the rotor 21 of the electric motor 16.

[0209] Thus, each of the first and second clutches 23a, 23b is configured to be switched either into an engaged position or into a disengaged position.

[0210] Advantageously, the engagement and disengagement of the first and second clutches 23a, 23b is controlled by the control unit 15.

[0211] Advantageously, as illustrated in figures 3 to 5, each of the first and second clutches 23a, 23b comprises an input shaft 25 and an output shaft 41.

[0212] Advantageously, at least a portion of the output shaft 41 of each of the first and second clutches 23a, 23b has a non-circular cross-section.

[0213] Here and as illustrated in figures 3 and 6, the output shaft 41 of each of the first and second clutches 23a, 23b comprises two flats 41a, only one of which is shown in figure 6.

[0214] The number of flats on the output shaft of each of the first and second clutches is not limited and can vary. It can be, for example, one or strictly more than two.

[0215] By "engaging", we mean the implementation of a clutch, at the level of each of the first and second clutches 23a, 23b, to mechanically couple its input shaft 25 and its output shaft 41 and transmit a rotational movement between this input shaft 25 and this output shaft 41.

[0216] By "disengaging", we mean the implementation of a disengagement, at the level of each of the first and second clutches 23a, 23b, to decouple its input shaft 25 and its output shaft 41 and not transmit any movement between this input shaft 25 and this output shaft 41.

[0217] Advantageously, when the electric motor 16 is electrically activated and only one of the first and second clutches 23a, 23b is engaged, only one of the first and second coupling elements 20a, 20b and, consequently, only one of the first and second drive shafts 9a, 9b is driven in rotation by the electric motor 16. Furthermore, when the electric motor 16 is electrically activated and the first and second clutches 23a, 23b are engaged, the first and second coupling elements 20a, 20b and, consequently, the first and second drive shafts 9a, 9b are driven in rotation by the electric motor 16. Thus, the first clutch 23a enables a first transmission, in other words, a first mechanical connection, between the electric motor 16 and the first coupling element 20a and, consequently, the first drive shaft 9a.In addition, the second clutch 23b allows for a second transmission, in other words a second mechanical link, between the electric motor 16 and the second coupling element 20b and, consequently, the second drive shaft 9b.

[0218] Advantageously, the first reducer 19a is connected, or is configured to be connected, to the rotor 21 of the electric motor 16, via the first clutch 23a, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the second reducer 19b is connected, or is configured to be connected, to the rotor 21 of the electric motor 16, via the second clutch 23b, particularly in the assembled configuration of the electromechanical actuator 11.

[0219] Advantageously, the first clutch 23a includes a first housing 49. Similarly, the second clutch 23b includes a second housing 49, which is distinct from the first housing 49 of the first clutch 23a.

[0220] Advantageously, the electromechanical actuator 11 further includes at least one brake.

[0221] Here, the electromechanical actuator 11 includes a first brake and a second brake, not shown.

[0222] By way of non-limiting examples, each of the first and second brakes can be a spring brake, a cam brake, a magnetic brake or an electromagnetic brake.

[0223] Advantageously, the first brake is configured to brake and / or block in rotation, in other words brakes and / or blocks in rotation, the first coupling element 20a and, consequently, the first drive shaft 9a, so as to regulate the speed of movement of the first movable bar 8a, during a movement of the screen 2, and to hold the first movable bar 8a in position, when the electromechanical actuator 11 is electrically deactivated and / or when the first clutch 23a is disengaged.Furthermore, the second brake is configured to brake and / or lock the rotation of the second coupling element 20b and, consequently, the second drive shaft 9b, so as to regulate the speed of the second moving bar 8b during the movement of the screen 2, and to hold the second moving bar 8b in position when the electromechanical actuator 11 is electrically deactivated and / or when the second clutch 23b is disengaged. Here, the first brake is configured to be located, particularly in the assembled configuration of the electromechanical actuator 11, between the first reducer 19a and the first coupling element 20a, that is, at the output of the first reducer 19a.In addition, the second brake is configured to be disposed, in other words is disposed, in particular in the assembled configuration of the electromechanical actuator 11, between the second reducer 19b and the second coupling element 20b, in other words at the output of the second reducer 19b.

[0224] Alternatively, not shown, each of the first and second brakes is respectively configured to be arranged, in other words is respectively arranged, in particular in the assembled configuration of the electromechanical actuator 11:

[0225] - between two reduction stages of the first reducer 19a, or between two reduction stages of the second reducer 19b, or

[0226] - between the first clutch 23a and the first reducer 19a, in other words at the output of the first clutch 23a, or between the second clutch 23b and the second reducer 19b, in other words at the output of the second clutch 23b.

[0227] Advantageously, the first and second brakes are mounted, or rather housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0228] Here, the first and second brakes are identical.

[0229] Advantageously, the electromechanical actuator 11 further includes a limit switch and / or obstacle detection device, which can be mechanical or electronic.

[0230] Advantageously, the end-of-travel and / or obstacle detection device of the electromechanical actuator 11 is implemented by means of the microcontroller 31 of the control unit 15 and, in particular, by means of an algorithm implemented by this microcontroller 31.

[0231] Advantageously, the end-of-travel and / or obstacle detection device of the electromechanical actuator 11 is implemented by means of a measurement of a current flowing through the electric motor 16.

[0232] Advantageously, the electromechanical actuator 11 further comprises at least one counting device 32a, 32b. Each of the first and second counting devices 32a, 32b is represented by its envelope in Figure 2, without details on its internal constituent elements.

[0233] Here, the electromechanical actuator 11 comprises a first counting device 32a and a second counting device 32b. Advantageously, the first counting device 32a is housed inside a first housing 50a. Similarly, the second counting device 32b is housed inside a second housing 50b, which is separate from the first housing 50a of the first counting device 32a.

[0234] Alternatively, but not shown, the first counting device 32a and the first clutch 23a are housed within the same casing. Similarly, the second counting device 32b and the second clutch 23b are housed within the same casing.

[0235] Each of the first and second counting devices 32a, 32b is configured to cooperate, that is to say, cooperates, with the control unit 15. In addition, each of the first and second counting devices 32a, 32b is configured to, in cooperation with the control unit 15, determine respectively a position, which can be called "current", of the first drive shaft 9a or the second drive shaft 9b and, consequently, of the first moving bar 8a or the second moving bar 8b.

[0236] Advantageously, the control unit 15 is configured to monitor at least one signal from each of the first and second counting devices 32a, 32b at a predetermined frequency, in particular depending on the position of the first moving bar 8a or the second moving bar 8b.

[0237] Each of the first and second counting devices 32a, 32b is of the magnetic type.

[0238] Each of the first and second counting devices 32a, 32b includes an encoder wheel, not shown, and one or more sensors, not shown, for detecting the position, in this case angular, of the encoder wheel, in particular one or more Hall effect sensors.

[0239] In one embodiment, each of the first and second counting devices 32a, 32b comprises two sensors.

[0240] The number of sensors on each counting device is not limited and can vary. It can be, for example, one or three.

[0241] The encoder wheel of each of the first and second counting devices 32a, 32b is connected to the output shaft 41 of the first clutch 23a or the second clutch 23b.

[0242] Thus, each of the first and second counting devices 32a, 32b allows respectively to determine the number of revolutions made by the output shaft 41 of the first clutch 23a or of the second clutch 23b.

[0243] Advantageously, the sensor(s) of the first and second counting devices 32a, 32b are mounted on an electronic board of the control unit 15, in particular on an additional electronic board, not shown. In one embodiment, the electromechanical actuator 11 comprises a single additional electronic board on which the sensor(s) of the first and second counting devices 32a, 32b are mounted.

[0244] Thus, the electromechanical actuator 11 includes an additional electronic board common to the first and second counting devices 32a, 32b.

[0245] Alternatively, and not shown, the electromechanical actuator 11 includes an additional electronic board for each of the first and second counting devices 32a, 32b. In this case, the sensor(s) of each of the first and second counting devices 32a, 32b are mounted respectively on one of the additional electronic boards. Thus, the electromechanical actuator 11 comprises two additional electronic boards.

[0246] Advantageously, each additional electronic card is held in position, or is configured to be held in position, inside the housing 17 by means of mounting elements, not shown, particularly in the assembled configuration of the electromechanical actuator 11.

[0247] In one example of the embodiment, the mounting elements are studs made in the casing 17, of which there are three.

[0248] The number and shape of the mounting elements are not limited and may vary. For example, there may be two or more, and they may be achieved using snap-fit ​​or push-fit fasteners. These mounting elements may also be incorporated, for example, into each of the first and second housings of the first and second counting devices.

[0249] Advantageously, each additional electronic card is electrically connected to the electronic card(s) 30 by means of an electrical link cable, not shown.

[0250] Here, the electrical connecting cable extends between the first and second counting devices 32a, 32b, in particular the additional electronic board, and the control unit 15, in particular one of the electronic boards 30, being disposed between the housing 17, in particular the base 17c of the housing 17, and the housings of other organs of the electromechanical actuator 11, such as, for example, the housings 49 of the first and second clutches 23a, 23b and a housing 51 of a coupling device 33.

[0251] In this case, one or both of the first and second housings 50a, 50b of the first and second counting devices 32a, 32b include an opening, not shown, to allow the passage of the electrical connecting cable between the housing 17, in particular the base 17c of the housing 17, and the housings of other components of the electromechanical actuator 11. Advantageously, the electrical connecting cable is a flat cable, provided with electrical connectors. Furthermore, each additional electronic board includes at least one electrical connector, not shown. Similarly, one or more of the electronic boards 30 includes at least one electronic connector, not shown.The electrical connectors of the electrical link cable are plugged in, or configured to be plugged in, with the electrical connector(s) of the additional electronic board(s) and with the electrical connector(s) of the electronic board(s) 30.

[0252] Alternatively, not shown, each of the first and second counting devices 32a, 32b allows respectively to determine the number of turns made by the output shaft of the first reducer 19a or of the second reducer 19b.

[0253] In another variant, not shown, each of the first and second counting devices 32a, 32b allows respectively to determine the number of turns made by the first coupling element 20a or the second coupling element 20b.

[0254] Each of the first and second counting devices 32a, 32b also allows respectively to determine the direction of rotation of the first coupling element 20a or the second coupling element 20b and / or to manage the end-of-stroke positions of the first moving bar 8a or the second moving bar 8b.

[0255] Here, the first and second counting devices 32a, 32b are identical.

[0256] Here, the first counting device 32a is configured to be positioned, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, between the first clutch 23a and the first reducer 19a. Furthermore, the second counting device 32b is configured to be positioned, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, between the second clutch 23b and the second reducer 19b.

[0257] Alternatively, not shown, the first counting device 32a is configured to be disposed, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, inside the first clutch 23a. Furthermore, the second counting device 32b is configured to be disposed, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, inside the second clutch 23b.

[0258] In another variant, not shown, the first counting device 32a is configured to be disposed, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, inside the first reducer 19a. Furthermore, the second counting device 32b is configured to be disposed, that is to say, is arranged, particularly in the assembled configuration of the electromechanical actuator 11, inside the second reducer 19b.

[0259] Advantageously, the electromechanical actuator 11 further includes at least one torque transmission device 10a, 10b.

[0260] Here, the electromechanical actuator 11 comprises a first torque transmission device 10a and a second torque transmission device 10b. Each of the first and second torque transmission devices 10a and 10b is represented by its outer casing in Figure 2, without details of its internal components. The first torque transmission device 10a is connected, on the one hand, to the electric motor 16, specifically by means of the first reduction gear 19a and the first clutch 23a, and, on the other hand, to the first drive shaft 9a, specifically by means of the first coupling element 20a. Furthermore, the second torque transmission device 10b is connected, on the one hand, to the electric motor 16, specifically by means of the second reduction gear 19b and the second clutch 23b, and, on the other hand, to the second drive shaft 9b, specifically by means of the second coupling element 20b.

[0261] Here, the first reducer 19a, in particular the output shaft of the first reducer 19a, is coupled, that is to say, is configured to be coupled, in particular in the assembled configuration of the electromechanical actuator 11, with the first coupling element 20a via the first torque transmission device 10a. Furthermore, the second reducer 19b, in particular the output shaft of the second reducer 19b, is coupled, that is to say, is configured to be coupled, in particular in the assembled configuration of the electromechanical actuator 11, with the second coupling element 20b via the second torque transmission device 10b.

[0262] Advantageously, the first and second torque transmission devices 10a, 10b are mounted, or rather housed, inside the casing 17, especially in the assembled configuration of the electromechanical actuator 11.

[0263] Here, the first and second torque transmission devices 10a, 10b are identical.

[0264] Alternatively, not shown, the first and second torque transmission devices 10a, 10b are different.

[0265] Here, the first reducer 19a and the first torque transmission device 10a are housed inside the same casing 48 as the first and second reducers 19a, 19b. Similarly, the second reducer 19b and the second torque transmission device 10b are housed inside the same casing 48.

[0266] Advantageously, the electromechanical actuator 11 further comprises the coupling device 33. This coupling device 33 is represented by its housing in Figure 2, without details on its internal constituent elements.

[0267] Advantageously, the coupling device 33 includes the housing 51.

[0268] Advantageously, the coupling device 33 includes a plurality of gears, not shown, in particular four in number.

[0269] The number of gears in the coupling device is not limited and can vary, preferably being even. It can be, for example, two or six.

[0270] Advantageously, the coupling device 33 further comprises an input shaft, which is connected to the first end of the rotor 21, and two output shafts, which are respectively connected to the input shaft 25 of the first clutch 23a and to the input shaft 25 of the second clutch 23b.

[0271] Advantageously, the sprockets are configured to be disposed, or are otherwise disposed, between the input shaft and the output shafts of the coupling device 33, particularly in an assembled configuration of the coupling device 33.

[0272] Here, the input shaft and one of the output shafts of the coupling device 33 are connected by one of the gears. Furthermore, the input shaft and the other output shaft of the coupling device 33 are connected by all the gears.

[0273] Here, the coupling device 33 is mounted, in other words is housed, in particular in the assembled configuration of the electromechanical actuator 11, inside the housing 17.

[0274] Here, the coupling device 33 is arranged between the electric motor 16, in particular the first end of the rotor 21 of the electric motor 16, and the first and second clutches 23a, 23b, in particular the input shaft 25 of each of the first and second clutches 23a, 23b.

[0275] In an alternative, not shown, the coupling device 33 is mounted, in other words is housed, in particular in the assembled configuration of the occulting device 3, inside the housing 7, while being disposed outside the housing 17. In this case, the coupling device 33 can be disposed at the second end 7d of the housing 7.

[0276] Advantageously, the coupling device 33 has a ratio of one, i.e. neither reduction nor amplification of a rotational speed of the rotor 21 of the electric motor 16. Advantageously, the housings of the various components of the electromechanical actuator 11, in particular the housing 51 of the coupling device 33, the housings 49 of the first and second clutches 23a, 23b, the first and second housings 50a, 50b of the first and second housings 32a, 32b and the housing 48 of the first and second reducers 19a, 19b and of the first and second torque transmission devices 10a, 10b, are assembled together by means of fastening elements, in particular by elastic snap-fit.

[0277] Advantageously, a first set 22 of a first part of the members 10a, 10b, 15, 16, 19a, 19b, 20a, 20b, 23a, 23b, 32a, 32b of the electromechanical actuator 11 are aligned along a first axis of rotation X22 and a second set 26 of a second part of the members 10a, 10b, 15, 16, 19a, 19b, 20a, 20b, 23a, 23b, 32a, 32b of the electromechanical actuator 11 are aligned along a second axis of rotation X26. In addition, the first and second axes of rotation X22, X26 are parallel.

[0278] Advantageously, the first assembly 22 includes the first clutch 23a, the first counting device 32a, the first reducer 19a, the first brake, and the first coupling element 20a. Furthermore, the second assembly 26 includes the second clutch 23b, the second counting device 32b, the second reducer 19b, the second brake, and the second coupling element 20b.

[0279] Here, the electric motor 16 is an integral part of the first assembly 22 and is also aligned along the first axis of rotation X22. In other words, the axes of rotation X16 and X22 coincide.

[0280] Alternatively, not shown, the electric motor 16 is an integral part of the second assembly 26 and is also aligned along the second axis of rotation X26.

[0281] Alternatively, not shown, the first end of the rotor 21 of the electric motor 16 is directly connected to the first clutch 23a. In addition, the first end of the rotor 21 of the electric motor 16 is connected to the second clutch 23b via the coupling device 33.

[0282] Alternatively, and not shown, the coupling device 33 comprises an input shaft, which is connected to the second end 21b of the rotor 21, and an output shaft, which is connected to the input shaft 25 of one of the first and second clutches 23a, 23b. The first end of the rotor 21 of the electric motor 16 is directly connected to the first clutch 23a. Furthermore, the second end 21b of the rotor 21 of the electric motor 16 is connected to the second clutch 23b via the coupling device 33. In this case, the electromechanical actuator 11 may further comprise a connecting shaft.Furthermore, particularly in the assembled configuration of the electromechanical actuator 11, the connecting shaft is coupled, or rather configured to be coupled, on the one hand, to the coupling device 33, in particular to the output shaft of the coupling device 33, and, on the other hand, to the second clutch 23b, in particular to the input shaft 25 of the second clutch 23b. Advantageously, the connecting shaft is a rigid shaft. Advantageously, the electromechanical actuator 11 further comprises at least one first universal joint and one second universal joint. The coupling device 33 is assembled, particularly in the assembled configuration of the electromechanical actuator 11, with the connecting shaft by means of the first universal joint. In addition, the second clutch 23b is assembled, in particular in the assembled configuration of the electromechanical actuator 11, with the connecting shaft by means of the second cardan joint.Thus, the first and second cardan joints ensure torque transmission between the coupling device 33 and the second clutch 23b via the connecting shaft, while accommodating positioning variations between the output shaft of the coupling device 33 and the input shaft 25 of the second clutch 23b. Advantageously, along the second axis of rotation X26, at least a portion of the control unit 15 is disposed between the coupling device 33 and the second clutch 23b, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the connecting shaft extends, along the second axis of rotation X26, through a region of the electromechanical actuator 11 comprising the control unit 15. This region of the electromechanical actuator 11 is defined, along the second axis of rotation X26, between the coupling device 33 and the second clutch 23b.

[0283] A motion generated by the electric motor 16 is transmitted to the first drive shaft 9a, via the first clutch 23a, the first reduction gear 19a, and the first coupling element 20a, if the first clutch 23a is in the engaged position. This same motion generated by the electric motor 16 is also transmitted to the second drive shaft 9b, via the coupling device 33, the second clutch 23b, the second reduction gear 19a, and the second coupling element 20a, if the second clutch 23b is in the engaged position.

[0284] Thus the electromechanical actuator 11 allows, with the help of this single electric motor 16 and the control unit 15, to drive the screen 2 according to several possibilities.

[0285] When the first and second clutches 23a, 23b are engaged and the electric motor 16 is activated, the motion generated by the electric motor 16 is transmitted to the first and second drive shafts 9a, 9b, which are then driven to rotate around the first and second axes of rotation Xa, Xb, respectively. In this case, the first and second movable bars 8a, 8b simultaneously perform the same vertical movement. This allows the position of a blackout zone in the opening to be selected.

[0286] When only the first clutch 23a is engaged and the electric motor 16 is activated, the movement generated by the electric motor 16 is transmitted only to the first drive shaft 9a. In this case, only the first movable bar 8a moves vertically, while the second movable bar 8b remains in position, i.e., is stationary. Thus, it is the height of the shading area that is changed relative to the opening.

[0287] Similarly, when only the second clutch 23b is engaged and the electric motor 16 is activated, the movement generated by the electric motor 16 is transmitted only to the second drive shaft 9b. In this case, only the second movable bar 8b moves vertically, while the first movable bar 8a remains in position, i.e., is stationary. Thus, it is the height of the shading area that is changed relative to the opening.

[0288] The first and second movable bars 8a, 8b can therefore be moved vertically by the electromechanical actuator 11 separately or simultaneously.

[0289] Advantageously, the electromechanical actuator 11 further comprises at least one coupling member. The coupling member(s) is configured to mechanically connect, or couple, a first transmission shaft to a second transmission shaft. The first transmission shaft is configured to be driven in rotation by the electric motor 16.

[0290] Here, the electromechanical actuator 11 includes a first coupling member, not shown, and a second coupling member, also not shown.

[0291] Here, the first transmission shaft of the first coupling member is the output shaft 41 of the first clutch 23a and the second transmission shaft is the input shaft of the first reducer 19a. Similarly, the first transmission shaft of the second coupling member is the output shaft 41 of the second clutch 23b and the second transmission shaft is the input shaft of the second reducer 19b.

[0292] Alternatively, not shown, the first drive shaft is the first end of rotor 21, respectively the second end 21b of rotor 21, and the second drive shaft is either the input shaft of the first reducer 19a, respectively of the second reducer 19b, or the input shaft 25 of the first clutch 23a, respectively of the second clutch 23b.

[0293] In another variant, not shown, the first transmission shaft is the output shaft of the first reducer 19a, respectively of the second reducer 19b, and the second transmission shaft is either the first end of the first coupling element 20a, respectively the first end of the second coupling element 20b, or the first end of the first torque transmission device 10a, respectively the first end of the second torque transmission device 10b.

[0294] In one embodiment, the first coupling member and the second coupling member are identical.

[0295] Advantageously, the first and second clutches 23a, 23b are mounted, in other words are housed, inside the casing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0296] Similarly, the first and second counting devices 32a, 32b, the first and second coupling members, the first and second reducers 19a, 19b and the coupling device 33 are mounted, that is to say, housed, inside the casing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0297] The first clutch 23a according to the embodiment of the invention is now described in more detail with reference to Figures 3 to 8. This description also applies to the second clutch 23b.

[0298] We note X23 as an axis of rotation of the first clutch 23a.

[0299] Advantageously, the first clutch 23a includes a cylinder head 76. In addition, the cylinder head 76 is mounted, that is to say, housed, inside the first housing 49, particularly in an assembled configuration of the first clutch 23a.

[0300] The first clutch 23a further comprises a central shaft 43.

[0301] Advantageously, the central shaft 43 comprises a first end 43a and a second end 43b. The second end 43b is opposite the first end 43a. The central shaft 43 includes the output shaft 41 at its first end 43a.

[0302] Advantageously, the central shaft 43 is mounted, in other words is housed, inside the cylinder head 76 and, consequently, the first housing 49, especially in the assembled configuration of the first clutch 23a.

[0303] Here, only part of the output shaft 41 protrudes, or rather extends beyond, the first housing 49, particularly in the assembled configuration of the first clutch 23a.

[0304] The first clutch 23a further comprises a movable part 44. In addition, the movable part 44 is translationally movable, in other words is configured to be translationally movable, in the direction of the axis of rotation X23, relative to the central shaft 43 and, in this case, relative to the cylinder head 76 and the first housing 49, between a first position and a second position.

[0305] The first position is the so-called "disengaged" position of the first clutch 23a. Furthermore, the second position is the so-called "engaged" position of the first clutch 23a.

[0306] Advantageously, the moving part 44 includes the input shaft 25.

[0307] Advantageously, the movable part 44 further comprises a flat ring 44a.

[0308] Here, the flat ring 44a and the shaft 25 form a single piece, In other words, the moving part 44 is a single piece.

[0309] Alternatively, not shown, the input shaft 25 is supported by the flat ring 44a, in other words is assembled or fixed on the flat ring 44a.

[0310] Advantageously, the moving part 44 is connected, in other words is configured to be connected, to the rotor 21 of the electric motor 16 and is movable in rotation, in other words is configured to be movable in rotation, relative to the cylinder head 76 and, consequently, to the first housing 49, especially in the assembled configuration of the first clutch 23a.

[0311] Thus, the moving part 44 is driven in rotation, in other words is configured to be driven in rotation, by the rotor 21 of the electric motor 16, in particular through the coupling device 33.

[0312] Advantageously, the central shaft 43 is connected, or rather configured to be connected, to the first coupling element 20a and is rotationally mobile, or rather configured to be rotationally mobile, relative to the cylinder head 76 and, consequently, to the first housing 49, especially in the assembled configuration of the first clutch 23a.

[0313] Thus, the central shaft 43 drives in rotation, in other words is configured to drive in rotation, the first coupling element 20a, in particular via the first reducer 19a.

[0314] The first clutch 23a also includes a coil 45.

[0315] Here, coil 45 is annular in shape.

[0316] Here, the central shaft 43, the moving part 44, the coil 45 and, possibly, the cylinder head 76 are centered on the axis of rotation X23, especially in the assembled configuration of the first clutch 23a.

[0317] Advantageously, the coil 45 is fixed relative to the cylinder head 76 and, consequently, to the first housing 49, especially in the assembled configuration of the first clutch 23a.

[0318] Advantageously, the coil 45 is mounted, in other words is housed, inside the cylinder head 76 and, consequently, the first housing 49, especially in the assembled configuration of the first clutch 23a.

[0319] The coil 45 generates, or is configured to generate, a magnetic field when it is supplied with electrical energy, so as to cause a displacement of the moving part 44 relative to the central shaft 43, between the first position and the second position.

[0320] Here, the electrical power supply to coil 45 is provided by control unit 15.

[0321] Advantageously, the first clutch 23a is by default in the first position, known as "disengaged". In other words, as long as the coil 45 is not supplied with electrical energy, the first clutch 23a is by default in the first position.

[0322] Advantageously, the first clutch 23a is in the second position, known as "engaged," as long as the coil 45 is supplied with electrical energy. In other words, the first clutch 23a is in the second position only during a period when the coil 45 is supplied with electrical energy.

[0323] Thus, as soon as the electrical power supply to the coil 45 is interrupted, the first clutch 23a switches from the second position to the first position.

[0324] The central shaft 43 comprises a core 46, a ring 47 and a bushing 52.

[0325] The ring 52 is disposed, in other words arranged or located, between the core 46 and the crown 47, in a direction radial to the axis of rotation X23, in particular in the assembled configuration of the first clutch 23a.

[0326] Thus, the ring 52 allows the crown 47 to be mechanically connected to the core 46 of the central shaft 43.

[0327] Here, the central shaft 43 is a component obtained by assembling the core 46, the ring 47 and the bushing 52.

[0328] The core 46 and the ring 47 are in contact, in other words are configured to be in contact, with the moving member 44 only in the second position, so as to drive the central shaft 43 by the moving member 44, around the axis of rotation X23, by adhesion.

[0329] Thus, in the second position of the first clutch 23a, the central shaft 43 and the moving member 44 are coupled and the first clutch 23a transmits a rotational movement between its input shaft 25 and its output shaft 41, given that the central shaft 43 is driven in rotation by the moving member 44, around the axis of rotation X23.

[0330] Furthermore, in the first position, the core 46 and the crown 47 are not in contact with the moving part 44.

[0331] Thus, in the first position of the first clutch 23a, the central shaft 43 and the moving member 44 are decoupled and the first clutch 23a does not transmit rotational motion between its input shaft 25 and its output shaft 41, since the central shaft 43 is not driven in rotation by the moving member 44, around the axis of rotation X23.

[0332] Advantageously, the core 46 and the ring 47 are made of a magnetic material, in particular a metallic, i.e., ferromagnetic. Furthermore, the ring 52 is made of a non-magnetic, i.e., non-magnetic, i.e., metallic, material, so as to guide the flow of a magnetic flux M generated by the coil 45 and to prevent the flow of the magnetic flux M directly between the core 46 and the ring 47. A simplified representation of the magnetic flux M, which is induced by the magnetic field generated by the coil 45, is shown in Figure 5.

[0333] Thus, the magnetic flux M generated by the coil 45 flows from the core 46 to the ring 47 through the moving part 44.

[0334] In this way, this circulation of the magnetic flux M generated by the coil 45 causes the movement of the moving part 44 relative to the central shaft 43, between the first position and the second position, and, more particularly, the bearing of the moving part 44 against the core 46 and the ring 47 of the central shaft 43.

[0335] Here, the core 46 and crown 47 are made of steel. Furthermore, the ring 52 is made of aluminum.

[0336] Advantageously, the 76 cylinder head is made of a magnetic material, in particular metallic.

[0337] Here, the material of the cylinder head 76 is steel.

[0338] Advantageously, the first 49 case is made of an insulating material, in other words, non-electrically conductive.

[0339] Here, the material of the first case 49 is a plastic material, such as, for example, Poly-Butylene Terephthalate, also called PBT, poly-acetal, also called POM, PolyAmide 6, also called polycaprolactam or PA 6, PolyAmide 6.6, also called polyhexamethylene adipamide or PA 6.6.

[0340] Advantageously, when the coil 45 is supplied with electrical energy, the magnetic flux M is channeled into the cylinder head 76, the core 46, the ring 47 and the moving member 44, so as to cause the moving member 44 to move relative to the central shaft 43, between the first position and the second position.

[0341] Thus, the construction of the first clutch 23a is simplified, in particular by minimizing the number of components, in order to improve its operational reliability.

[0342] In this way, the cost of obtaining the first clutch 23a and, consequently, the electromechanical actuator 11, is minimized. Furthermore, the connection between the central shaft 43 and the moving part 44 for engaging or disengaging the first clutch 23a is achieved through friction.

[0343] Therefore, this link between the central shaft 43 and the moving part 44 makes it possible to avoid an untimely blockage of the first clutch 23a when moving from the second position to the first position.

[0344] The electrical power supply to the coil 45 is implemented continuously, only when the moving part 44 relative to the central shaft 43 moves between the first and second positions, and when the moving part 44 is held in position relative to the central shaft 43 in the second position.

[0345] In other words, the electrical power supply to the coil 45 of the first clutch 23a is used only to move the moving part 44 relative to the central shaft 43 between the first and second positions, and to hold the moving part 44 in position relative to the central shaft 43 in the second position. During the movement of the moving part 44 and while it is held in position, the electrical power supply to the coil 45 is continuous.

[0346] By "continuous implementation", it is understood that the coil 45 is supplied with electric current for the entire period of movement of the moving member 44 or for the entire period of maintenance of the moving member 44 in the second position, under the effect of the magnetic flux M.

[0347] Therefore, the value of an electric current from the electrical power supply of coil 45 is reduced, in particular compared to the value of an electric current from the electrical power supply by electrical pulse.

[0348] Advantageously, in the first position, a non-zero axial air gap Ja is present between, on the one hand, the core 46 and the ring 47 and, on the other hand, the moving member 44, along the direction of the axis of rotation X23. Furthermore, in the second position, the core 46 and the ring 47 are pressed against the moving member 44, along the direction of the axis of rotation X23.

[0349] Thus, in the second position, the axial air gap Ja is canceled by the translational displacement of the moving member 44 relative to the central shaft 43 from the second position to the first position, along the direction of the axis of rotation X23 and in the direction of the central shaft 43.

[0350] Here, and in no way limitingly, the value of the axial air gap Ja is on the order of two to three tenths of a millimeter. Advantageously, a radial air gap Jr of a non-zero value is present between, on the one hand, the core 46 and the ring 47 and, on the other hand, the yoke 76, in a direction radial to the axis of rotation X23.

[0351] Here, and in no way limitingly, the value of the radial air gap Jr is on the order of two to three tenths of a millimeter.

[0352] Advantageously, the coil 45 comprises at least one winding 53 and a support 54. In addition, the winding 53 is made by winding a metal wire 55 around the support 54.

[0353] Here, the metal wire 55 of the winding 53 is made of copper.

[0354] The material of the wire is not limited and can vary. It can be, for example, aluminum.

[0355] Here, the metal wire 55 of the winding 53 is covered with a layer of enamel.

[0356] Advantageously, the support 54 includes at least a first flange 56, a second flange 57, and a winding area 58. The winding area 58 is arranged between the first and second flanges 56, 57, along a direction of a longitudinal axis X45 of the coil 45. Furthermore, the metal wire 55 of the winding 53 is wound, or is configured to be wound, in the winding area 58, particularly in the assembled configuration of the first clutch 23a.

[0357] Here and as illustrated in figure 8, the winding zone 58 is defined by a first cylinder 59, which is connected to the first and second flanges 56, 57. The winding zone 58 thus corresponds to a winding drum provided between the first and second flanges 56, 57.

[0358] Advantageously, the coil 45 is electrically connected to the control unit 15 via an electrical cable 60.

[0359] Advantageously, the electrical cable 60 includes electrical conductors, not shown, an electrical insulation sheath and an electrical connector 82.

[0360] Here, the number of electrical conductors in the 60 electrical cable is two.

[0361] Advantageously, the electric current from the power supply to the coil 45 has any direction of flow, that is to say from a positive polarity to a negative polarity or from a negative polarity to a positive polarity.

[0362] Therefore, the direction of flow of the magnetic flux M through the cylinder head 76, the core 46, the ring 47 and the moving part 44 is arbitrary.

[0363] Thus, the operation of the first clutch 23a is independent of the direction of flow of the electric current from the power supply to the coil 45 and, consequently, of the direction of flow of the magnetic flux M through the cylinder head 76, the core 46, the ring 47 and the moving part 44.

[0364] In this way, the electrical connection of the electrical conductors of the electrical cable 60, on the one hand, to the first clutch 23a and, on the other hand, to the control unit 15 can be implemented in any direction, unlike the first and second bistable type clutches described in document WO 2021 / 123176 A1, which require identifying the electrical conductors of the electrical cable, so as to circulate the electrical current from the electrical power supply of the coil in the desired direction to reach either the first position, known as "disengaged", or the second position, known as "engaged".

[0365] Advantageously, the support 54 further comprises a third flange 61 and an electrical connection area 62. The third flange 61 is disposed outside the winding area 58 and is parallel to the first flange 56. The electrical connection area 62 is disposed between the third flange 61 and the first flange 56, along the direction of the longitudinal axis X45 of the coil 45. In addition, the electrical conductors of the power cable 60 are electrically connected to the ends of the wire 55 of the winding 53.

[0366] Advantageously, the support 54 further includes a barrel 63, as illustrated in Figure 8. The barrel 63 is provided on the third flange 61 of the support 54. The electrical cable 60 includes a cap 77. The cylinder head 76 includes an opening 64, which is, in particular, through-hole. The cap 77 of the electrical cable 60 is mounted, that is to say, inserted, onto the barrel 63 of the support 54, particularly in the assembled configuration of the first clutch 23. Furthermore, the cap 77 of the electrical cable 60 is mounted, that is to say, housed, inside the opening 64 of the cylinder head 76, particularly in the assembled configuration of the first clutch 23a.

[0367] Thus, the insertion of the barrel 63 and, more particularly, of the cap 77 of the electrical cable 60 inside the opening 64 of the breech 76 allows the support 54 to be indexed in rotation relative to the breech 76 and, consequently, to the first housing 49, around the axis of rotation X23.

[0368] In addition, the shaft 63 allows the electrical cable 60 to be guided from the outside of the support 54 to the electrical connection area 62 of the support 54.

[0369] Furthermore, the cap 77 helps to protect the electrical cable 60 from the support 54 and the cylinder head 76.

[0370] Here, the electrical connection area 62 is defined by a second cylinder 65, which is connected to the first and third flanges 56, 61. The electrical connection area 62 thus corresponds to a groove formed in the support 54 between the first and third flanges 56, 61. The first and second cylinders 59, 65 can have the same outside diameter or different outside diameters.

[0371] Advantageously, the central shaft 43 also includes a first bore 66.

[0372] Advantageously, the first clutch 23a further comprises a piston 67 and an elastic return element 68. In addition, the piston 67 and the elastic return element 68 are mounted, that is to say, are housed, inside the first bore 66 of the central shaft 43, particularly in the assembled configuration of the first clutch 23a.

[0373] Advantageously, the elastic return element 68 comprises a first end 68a and a second end 68b. The second end 68b is opposite the first end 68a. The first end 68a of the elastic return element 68 is supported, that is, configured to bear against, a bottom wall 66a of the first bore 66, particularly in the assembled configuration of the first clutch 23a. Furthermore, the second end 68b of the elastic return element 68 is supported, that is, configured to bear against, the piston 67, particularly a shoulder 67c of the piston 67, particularly in the assembled configuration of the first clutch 23a.

[0374] Here, the elastic return element 68 is a spring, in particular, a compression spring and, more specifically, a spiral spring.

[0375] Advantageously, the elastic return element 68 exerts a force F against the piston 67. This force F is such that, when the coil 45 is not supplied with electrical energy, that is to say when no electrical voltage is applied to the terminals of the coil 45, the piston 67 presses, in other words is configured to press, against the moving member 44, so as to maintain the moving member 44 in the first position, which corresponds to a rest position of the first clutch 23a, or to move the moving member 44 in translation from the second position to the first position, according to the direction of the axis of rotation X23.

[0376] Thus, following the interruption of the electrical power supply to the coil 45, the first clutch 23a switches from the second position to the first position under the action of the elastic return element 68 and the piston 67.

[0377] In this way, the force F exerted by the elastic return element 68 via the piston 67 makes it possible to overcome a residual magnetic field present in the cylinder head 76, the core 46 and the ring 47, so as to return the moving part 44 to its rest position relative to the central shaft 43.

[0378] Advantageously, the piston 67 comprises a first end 67a and a second end 67b. The second end 67b is opposite the first end 67a. Advantageously, the piston 67 comprises a guide pin 69. The elastic return element 68 comprises a central recess 70. Furthermore, the guide pin 69 of the piston 67 is inserted, or rather configured to be inserted, inside the central recess 70 of the elastic return element 68, particularly in the assembled configuration of the first clutch 23a.

[0379] Thus, the guide pin 69 of the piston 67 guides the elastic return element 68 relative to the piston 67, according to the direction of the axis of rotation X23.

[0380] Here, the guide pin 69 is disposed, in other words arranged or located, at the level of the first end 67a of the piston 67.

[0381] Advantageously, the moving part 44 also includes a second bore 71.

[0382] Advantageously, the piston 67 further includes a centering pin 72. In addition, the centering pin 72 of the piston 67 is inserted, or rather configured to be inserted, into the second bore 71 of the moving member 44, in particular in the assembled configuration of the first clutch 23a.

[0383] Thus, the centering pin 72 of the piston 67 centers the moving part 44 relative to the piston 67, according to the direction of the axis of rotation X23.

[0384] Here, the centering pin 72 is disposed, in other words arranged or located, at the level of the second end 67b of the piston 67.

[0385] Advantageously, the first clutch 23a further comprises a first bearing 73 and a second bearing 74. In addition, the first and second bearings 73, 74 support in rotation, in other words are configured to support in rotation, the central shaft 43 inside the cylinder head 76 and, consequently, of the first housing 49, particularly in the assembled configuration of the first clutch 23a.

[0386] Here, in particular in the assembled configuration of the first clutch 23a, the first bearing 73 supports in rotation, in other words is configured to support in rotation, the output shaft 41 and the second bearing 74 supports in rotation, in other words is configured to support in rotation the core 46 of the central shaft 43, in particular in the assembled configuration of the first clutch 23a.

[0387] Advantageously, the first and second bearings 73, 74 are mounted, in other words are housed, inside the cylinder head 76, particularly in the assembled configuration of the first clutch 23a.

[0388] Advantageously, the first and second bearings 73, 74 are fixed relative to the cylinder head 76.

[0389] Here and in no way limiting, the first bearing 73 has an outer section of triangular shape and the second bearing 74 has an outer section of circular shape, as seen in figure 3. In addition, a first section of the cylinder head 76 at the level of the area of ​​fitting of the first bearing 73 in the cylinder head 76 and a second section of the cylinder head 76 at the level of the area of ​​fitting of the second bearing 74 in the cylinder head 76 are of circular section.

[0390] Advantageously, the first clutch 23a further comprises an axial stop element 75. In addition, the axial stop element 75 limits, in other words is configured to limit, the displacement of the moving member 44 from the second position to the first position, according to the direction of the axis of rotation X23.

[0391] Thus, when the moving part 44 is in the first position, called "disengaged", the moving part 44 is in contact with the axial stop element 75.

[0392] Advantageously, the axial stop element 75 is mounted, in other words is housed, inside the first housing 49, particularly in the assembled configuration of the first clutch 23a.

[0393] Advantageously, the axial stop element 75 is fixed relative to the first housing 49.

[0394] Advantageously, the first clutch 23a further includes a connecting element 78. In addition, the connecting element 78 is fixed, that is to say, is configured to be fixed, to the first housing 49, in particular in the assembled configuration of the first clutch 23a.

[0395] Advantageously, the connecting element 78 is, moreover, fixed, in other words is configured to be fixed, to the first reducer 19a, in particular in the assembled configuration of the first clutch 23a.

[0396] Advantageously, the attachment of the connecting element 78 to the first housing 49 and / or the attachment of the connecting element 78 to the first reducer 19a is implemented by means of fixing elements 79, in particular by elastic snap-fit.

[0397] Advantageously, the connecting element 78 further comprises at least one elastic return element 80. In addition, the elastic return element or each of the elastic return elements 80 is supported against the cylinder head 76, in particular in the assembled configuration of the first clutch 23a.

[0398] Thus, the elastic return element 80 of the linking element 78 makes it possible to compensate for axial operating clearances, according to the direction of the axis of rotation X23, between the different components of the first clutch 23a, other than the axial air gap Ja.

[0399] Here, the connecting element 78 comprises two elastic return elements 80, only one of which is shown in figure 3.

[0400] The number of elastic return elements is not limited and can vary. It can be, for example, one or more than three. Here, each elastic return element 80 of the connecting element 78 is implemented in the form of an elastic tab.

[0401] Advantageously, the attachment of the first housing 49 to the coupling device 33 is implemented by means of fastening elements 81, in particular by elastic snap-fit.

[0402] Here, the 81 fixing elements are in the form of hooks.

[0403] Thanks to the present invention, the construction of the first clutch and, possibly, the second clutch is simplified, in particular by minimizing the number of components, so as to improve the reliability of its operation.

[0404] Numerous modifications can be made to the embodiment examples described above, without departing from the scope of the invention as defined by the claims.

[0405] As an alternative, not shown, the first and second clutches 23a, 23b are different.

[0406] Alternatively, not shown, the occultation device 3 comprises only one movable bar, namely either the first movable bar 8a or the second movable bar 8b.

[0407] Alternatively, not shown, the occultation device 3 comprises a number of movable bars greater than or equal to three, which can all be moved by means of the electromechanical actuator 11, respectively by means of a clutch and, optionally, a reducer, a torque transmission device, a counting device and a brake.

[0408] Alternatively, and not shown, the first and second cords 4a, 4b, as well as the third and fourth cords 4c, 4d, particularly their ends, are fixed to a window or door frame or to a building wall, specifically by means of retaining elements. Thus, the shading device 3 may be without a housing, i.e., a rail, positioned at the top or above the opening. In this case, the retaining elements are configured to be fixed, i.e., are attached, to the window or door frame or to the building wall by means of fixing screws, not shown. The fixing screws pass through holes provided in the retaining elements and are screwed either into plugs, not shown, embedded in the window or door frame or in the building wall, or directly into the window or door frame or into the building wall.Furthermore, the lengths of the first, second, third, and fourth cords 4a, 4b, 4c, 4d are designed so that they remain permanently taut relative to the window or door structure or the building wall, thus allowing the first and second movable bars 8a, 8b to move along them. In this case, the motorized drive device 5, in particular the electromechanical actuator 11, is mounted, or rather housed, inside one of the movable bars 8a, 8b, especially in the assembled configuration of the shading device 3.

[0409] In another variant, not shown, the first, second, third and fourth cords 4a, 4b, 4c, 4d can be kept taut by means of one or more elastic return elements, such as, for example, one or more springs.

[0410] In another variant, the first and second drive shafts 9a, 9b are coaxial. In this case, the first and second drive shafts 9a, 9b are located on either side of the electromechanical actuator 11. That is, the first coupling element 20a is located at the first end 11a of the electromechanical actuator 11, and the second coupling element 20b is located at the second end 11b of the electromechanical actuator 11. Thus, the two outputs of the electromechanical actuator 11 are located on either side of the electromechanical actuator 11, specifically of the housing 17. Furthermore, the first and second drive shafts 9a, 9b are located on either side of the electromechanical actuator 11 in the same way as the first and second coupling elements 20a, 20b.

[0411] Alternatively, the electric motor 16 of the electromechanical actuator 11 can be of the asynchronous type.

[0412] Alternatively, and not shown, the electromechanical actuator 11 further comprises at least one other electric motor. Thus, the electromechanical actuator 11 comprises the electric motor 16, which can be called the first electric motor, and a second electric motor, in particular identical ones. In this case, the electromechanical actuator 11 lacks a coupling device 33.Thus, the first electric motor 16 is configured to drive, in other words, rotates, the first coupling element 20a, via the first clutch 23a and, optionally, the first reduction gear 19a and / or the first torque transmission device 10a, and the second electric motor is configured to drive, in other words, rotates, the second coupling element 20b, via the second clutch 23b and, optionally, the second reduction gear 19b and / or the second torque transmission device 10b. In this case, the first assembly 22 comprises the first electric motor 16, which is aligned along the first axis of rotation X22, and the second assembly 26 comprises the second electric motor, which is aligned along the second axis of rotation X26.

[0413] Regardless of the method of implementation, one or each of the first, second, third and fourth cords 4a, 4b, 4c, 4d can be replaced by a chain.

[0414] Furthermore, the envisaged embodiments and variants can be combined to generate new embodiments of the invention, without departing from the scope of the invention as defined by the claims.

Claims

1. DEMANDS 1. Electromechanical actuator (11) for a blackout device (3), the electromechanical actuator (11) comprising at least: - an electric motor (16), - a first coupling element (20a), and - a first clutch (23a), the first clutch (23a) being engaged or disengaged so as to lock or unlock, at least in rotation, the first coupling element (20a) with respect to the electric motor (16), the first clutch (23a) comprising at least: - a central tree (43), - a movable part (44), the movable part (44) being movable in translation relative to the central shaft (43) between a first position and a second position, along a direction of an axis of rotation (X23) of the first clutch (23a), the first position being a disengaged position of the first clutch (23a) and the second position being an engaged position of the first clutch (23a), and - a coil (45), the coil (45) generating a magnetic field, when supplied with electrical energy, so as to cause a displacement of the moving part (44) relative to the central shaft (43), between the first position and the second position, characterized in that the first clutch (23a) is of the monostable type, in that the central shaft (43) comprises at least: - a nucleus (46), - a crown (47), and - a ring (52), the ring (52) being disposed between the core (46) and the ring (47), in a direction radial to the axis of rotation (X23), in that the core (46) and the ring (47) are in contact with the moving member (44) only in the second position, so as to drive the central shaft (43) by the moving member (44), around the axis of rotation (X23), by adhesion, and in that the supply of electrical energy to the coil (45) is implemented continuously, only during the movement of the moving member (44) relative to the central shaft (43), between the first position and the second position, and during the holding in position of the moving member (44) relative to the central shaft (43) in the second position.

2. Electromechanical actuator (11) for a blackout device (3) according to claim 1, characterized in that the core (46) and the ring (47) are made of a magnetic material, and in that the ring (52) is made of a non-magnetic material, so as to guide a flow of a magnetic flux (M) generated by the coil (45) through the moving member (44) and to prevent the flow of the magnetic flux (M) directly between the core (46) and the ring (47).

3. Electromechanical actuator (11) of a blackout device (3) according to claim 2, characterized in that the first clutch (23a) further comprises a cylinder head (76), in that the cylinder head (76) is made of a magnetic material, and in that, when the coil (45) is supplied with electrical energy, the magnetic flux (M) is channeled into the cylinder head (76), the core (46), the ring (47) and the moving member (44), so as to cause the moving member (44) to move relative to the central shaft (43), between the first position and the second position.

4. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 3, characterized in that, in the first position, an axial air gap (Ja) of a non-zero value is present between, on the one hand, the core (46) and the ring (47) and, on the other hand, the moving member (44), along the direction of the axis of rotation (X23), and in that, in the second position, the core (46) and the ring (47) are pressed against the moving member (44), along the direction of the axis of rotation (X23).

5. Electromechanical actuator (11) for a shutter device (3) according to any one of claims 1 to 4, characterized in that the central shaft (43) further comprises a first bore (66), in that the first clutch (23a) further comprises a piston (67) and a spring return element (68), the piston (67) and the spring return element (68) being mounted inside the first bore (66) of the central shaft (43), and in that the spring return element (68) exerts a force (F) against the piston (67) and, when the coil (45) is not electrically powered, the piston (67) presses against the moving member (44), so as to maintain the moving member (44) in the first position or to move in translation the moving part (44) from the second position to the first position, according to the direction of the axis of rotation (X23).

6. Electromechanical actuator (11) of a blackout device (3) according to any one of claims 1 to 5, characterized in that the moving member (44) further comprises a second bore (71), in that the piston (67) further comprises a centering pin (72), and in that the centering pin (72) of the piston (67) is inserted into the second bore (71) of the moving member (44).

7. Shading device (3), the shading device (3) comprising at least: - a screen (2), the screen (2) comprising a first end (2a) and a second end (2b), the second end (2b) being opposite the first end (2a), - a first movable bar (8a), the first end (2a) of the screen (2) being connected to the first movable bar (8a), and - a motorized drive device (5), the motorized drive device (5) being configured to drive the screen (2) in motion, the motorized drive device (5) comprising at least: - an electromechanical actuator (11) according to any one of claims 1 to 6, the electromechanical actuator (11) being configured to drive the first movable bar (8a) in displacement.

8. A blocking device (3) according to claim 7, characterized in that the blocking device (3) further comprises: - a first cord or a first chain (4a), - a second cord or a second chain (4b), - a first drive arrangement (6a), the first drive arrangement (6a) being configured to cooperate with the first cord or the first chain (4a), and - a second drive arrangement (6b), the second drive arrangement (6b) being configured to cooperate with the second cord or second chain (4b), and in that the electromechanical actuator (11) is configured to drive the first movable bar (8a) in movement by means of the first and second cords or chains (4a, 4b).

9. A blocking device (3) according to claim 7 or claim 8, characterized in that the blocking device (3) further comprises: - a second movable bar (8b), the second end (2b) of the screen (2) being connected to the second movable bar (8b), in that the electromechanical actuator (11) further comprises: - a second coupling element (20b), and - a second clutch (23b), the second clutch (23b) being engaged or disengaged, so as to connect or disconnect, at least in rotation, the second coupling element (20b) with respect to the electric motor (16), the second clutch (23b) being identical to the first clutch (23a), and in that the electromechanical actuator (11) is configured to drive the second movable bar (8b) in movement.

10. A blocking device (3) according to claim 9, characterized in that the blocking device (3) further comprises: - a third cord or a third chain (4c), - a fourth cord or a fourth chain (4d), - a third drive arrangement (6c), the third drive arrangement (6c) being configured to cooperate with the third cord or the third chain (4c), and - a fourth drive arrangement (6d), the fourth drive arrangement (6d) being configured to cooperate with the fourth cord or chain (4d), and in that the electromechanical actuator (11) is configured to drive the second moving bar (8b) in displacement by means of the third and fourth cords or chains (4c, 4d).

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