Electromechanical actuator, shading device comprising such an actuator and associated calibration method

Abstract

The invention relates to an actuator comprising a motor and a control unit (15), which comprises a microcontroller (30) and a device (39) for determining a power supply disconnection time from a power source (24), fitted with first and second switching elements (40, 45) and a timing circuit (41). The circuit (41) comprises a first component (42), configured so that the microcontroller (30) determines a period of time elapsed between two instants on the basis of a variation in a voltage supplied by the first component (42), and a second component (44), which discharges the first component (42) when the first switching element (40) is open. The second switching element (45) is switched to its open state when the actuator (11) is not supplied with power by the power source (24). In addition, the second switching element (45) is connected to the circuit (41) and to an input port (32) of the microcontroller (30).

Description

[0001] TITLE: Electromechanical actuator, shading device comprising such an actuator and associated calibration method

[0002] The present invention relates to an electromechanical actuator for a blackout device, in other words an electromechanical actuator of a blackout device, as well as a blackout device comprising a screen driven in movement by such an electromechanical actuator.

[0003] The present invention also relates to a method for calibrating a device for determining a power cut-off time period belonging to 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.

[0005] A motorized drive device includes an electromechanical actuator of a movable closing, obscuring or sun protection element such as a shutter, a door, a grille, a blind or any other equivalent material, hereafter referred to as a screen.

[0006] We already know of document EP 1 591 612 A1, which describes an electromechanical actuator for a blinding device. The electromechanical actuator is configured to be connected to an electrical power supply. The electromechanical actuator includes an electric motor and a control unit. The control unit controls the electric motor. The control unit includes a microcontroller and a device for determining a power-off time period, during which the electromechanical actuator is not supplied with electrical power from the power supply. The microcontroller includes an input port. The time-off device includes a switching element and a timing circuit. The switching element is configured to switch between an open state and a closed state, and vice versa.The switching element is switched to its open state when the electromechanical actuator is not receiving power from the power supply. The switching element is electrically connected to the timing circuit. The timing circuit is powered when the switching element is switched to its closed state by the microcontroller. The timing circuit comprises a first passive component and a second passive component. The first passive component is configured so that the microcontroller determines the elapsed time between two instants based on a change in the voltage supplied by the first passive component. Furthermore, the first passive component is discharged by the second passive component when the first switching element is switched to its open state. This electromechanical actuator generally performs satisfactorily.

[0007] The determination of the power outage time period is implemented by means of a value of electrical energy stored by the first passive component and a relationship of the discharge of the first passive component as a function of time.

[0008] However, this electromechanical actuator has the disadvantage that the timing circuit is electrically connected directly to the microcontroller.

[0009] Thus, the direct electrical connection between the timing circuit and the microcontroller results in an additional discharge of the first passive component, which is added to the discharge of the first passive component through the second passive component. This additional discharge of the first passive component is not controlled, just like the discharge through the second passive component, because it depends on intrinsic characteristics of the microcontroller and its operation.

[0010] Therefore, the determined power outage time period is incorrect.

[0011] Furthermore, the actual value of the timing circuit during the loading of the first passive component is altered during a measurement performed via a measuring device and the microcontroller, particularly when power is supplied to the electromechanical actuator. This alteration of the measured timing circuit value is due to additional resistance arising from the microcontroller's operation during the measurement.

[0012] US patent 2023 / 0198254 A1 is also known, describing an electromechanical actuator for a blinding device. The electromechanical actuator is configured to be connected to an electrical power supply. It comprises an electric motor and a control unit. The control unit controls the electric motor and includes a microcontroller. The electromechanical actuator is configured to switch between a first operating mode, activated by a first switch, in which the control unit powers the electric motor from batteries, and a second operating mode, activated by a second switch, in which the control unit powers the electric motor from an energy storage element.

[0013] We also know of document CN 117 039 809 A, which describes a portable power tool with adjustable speed. The power tool is battery-powered. The power tool includes an electric motor and an undervoltage protection circuit. The undervoltage protection circuit includes a microcontroller with an input port.

[0014] The present invention aims to resolve the aforementioned drawbacks and to provide an electromechanical actuator for a blackout device, a blackout device comprising such an electromechanical actuator, and a method for calibrating a device for determining a power outage time period belonging to such an electromechanical actuator, enabling the reliability and accuracy of the determination of the power outage time period, during which the electromechanical actuator is not supplied with electrical energy by an electrical power supply source.

[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, and

[0017] - a control unit, the control unit controlling the electric motor, the control unit comprising at least:

[0018] - a microcontroller, the microcontroller comprising at least one input port, and

[0019] - a device for determining a power outage period during which the electromechanical actuator is not supplied with electrical energy by the power supply, the determining device comprising at least:

[0020] - a first switching element, the first switching element being configured to be switched between an open state and a closed state, and conversely, the first switching element being switched to its open state, when the electromechanical actuator is not supplied with electrical energy by the electrical power supply source, and

[0021] - a timing circuit, the first switching element being electrically connected to the timing circuit, the timing circuit being supplied with electrical energy, when the first switching element is switched to its closed state by the microcontroller, the timing circuit comprising at least:

[0022] - a first passive component, the first passive component being configured so that the microcontroller determines a period of time elapsed between two instants from a variation of a voltage supplied by the first passive component, and

[0023] - a second passive component, the first passive component being discharged by the second passive component, when the first switching element is switched into its open state.

[0024] According to the invention, the determining device further comprises at least one second switching element. This second switching element is configured to switch between an open state and a closed state, and vice versa. The second switching element is switched to its open state when the electromechanical actuator is not receiving electrical power from the power supply. Furthermore, the second switching element is electrically connected, on one side, to the timing circuit and, on the other side, to the microcontroller's input port.

[0025] Thus, the electrical disconnection of the timing circuit from the microcontroller, when the electromechanical actuator is not supplied with electrical energy by the power supply source, makes it possible to avoid an additional discharge of the first passive component caused by the operation of the microcontroller, which is added to the discharge of the first passive component through the second passive component.

[0026] In this way, the discharge of the first passive component is controlled, since it only occurs through the second passive component.

[0027] Therefore, the control unit ensures the reliability and accuracy of determining a power outage time period, during which the electromechanical actuator is not supplied with electrical energy by the electrical power supply source.

[0028] According to an advantageous feature of the invention, the timing circuit further comprises a first connection point, a second connection point, and a third connection point. The control unit further comprises a reference ground. The first connection point is electrically connected, on one side, to the first switching element and, on the other side, to the second connection point. The second connection point is electrically connected, on one side, to the second switching element and, on the other side, to the first connection point. Furthermore, the third connection point is electrically connected to the first passive component, the second passive component, and the reference ground of the control unit. According to another advantageous feature of the invention, the first passive component is a capacitor. The second passive component is a first resistor.In addition, the second passive component is mounted in parallel with the first passive component.

[0029] According to another advantageous feature of the invention, the first and second switching elements are switched respectively in their closed state by the microcontroller.

[0030] According to another advantageous feature of the invention, the determination device further comprises a third switching element and a fourth switching element. The first switching element is switched to its closed state by the microcontroller via the third switching element. Furthermore, the second switching element is switched to its closed state by the microcontroller via the fourth switching element.

[0031] According to another advantageous feature of the invention, the determination device further comprises a measuring device, the measuring device being disposed between the second switching element and the input port of the microcontroller.

[0032] According to another advantageous feature of the invention, the determining device further comprises at least one diode. The diode is electrically connected, on the one hand, to the first switching element and, on the other hand, to the timing circuit. Furthermore, the diode conducts from the first switching element to the timing circuit and blocks from the timing circuit to the first switching element.

[0033] According to another advantageous feature of the invention, the microcontroller further comprises a first output port and a second output port, the first output port being configured to enable and disable a load control signal, and the second output port being configured to enable and disable a read control signal. Enabling the load control signal switches the first switching element from its open state to its closed state. Disabling the load control signal switches the first switching element from its closed state to its open state. Enabling the read control signal switches the second switching element from its open state to its closed state. Furthermore, disabling the read control signal switches the second switching element from its closed state to its open state.

[0034] According to another advantageous feature of the invention, when the electromechanical actuator is not supplied with electrical energy from the power supply source, the timing circuit is electrically isolated from the other components of the control unit, by means of the first switching element and the second switching element switching respectively in their open state.

[0035] The present invention relates, according to a second aspect, to a blocking device, the blocking device comprising at least:

[0036] - a screen, and

[0037] - an electromechanical actuator, according to the invention and as mentioned above, the screen being driven in movement by the electromechanical actuator.

[0038] This obscuring device has characteristics and advantages similar to those described previously, in relation to the electromechanical actuator according to the invention.

[0039] According to a third aspect, the present invention relates to a method for calibrating a device for determining a power cut-off time period belonging to an electromechanical actuator, according to the invention and as mentioned above, the method comprising at least the following steps: a) a step of receiving a command order from the electromechanical actuator; b) a first step of activating the read command signal, by the microcontroller through the second output port, causing the second switching element to switch to its closed state; c) a first step of measuring an initial voltage value supplied by the timing circuit, by the measuring device;d) a first step of reading the initial voltage value measured in step c) by the microcontroller through its input port; e) a first step of storing the initial voltage value measured in a memory of the microcontroller; f) a first step of deactivating the read control signal by the microcontroller, causing the second switching element to switch to its open state; g) a second step of activating the charge control signal by the microcontroller through the first output port, causing the first switching element to switch to its closed state; h) a step of charging the first passive component from the power supply to a predetermined charging voltage; i) a step of discharging the first passive component through the second passive component for a first predetermined period of time;j) a second step of deactivating the charge control signal, by the microcontroller, for a second predetermined time period, causing the first switching element to switch to its open state; k) a third step of activating the read control signal, by the microcontroller through its second output port, causing the second switching element to switch to its closed state; l) a second step of measuring a post-discharge voltage value provided by the timing circuit, using the measuring device; m) a second step of reading the measured post-discharge voltage value, by the microcontroller through its input port; n) a second step of storing the measured post-discharge voltage value in the microcontroller's memory; o) a first step of calculating an actual value of a constant of the timing circuit according to the formula:; p) a second step of calculating a reset voltage value for a predetermined inhibition time period according to the formula: q) a third step of storing the reset voltage value in the microcontroller's memory.

[0040] 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:

[0041] [Fig 1] Figure 1 is a schematic cross-sectional 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 the installation illustrated in Figure 1;

[0042] [Fig 3] Figure 3 is a schematic perspective view of a motorized drive device of the installation illustrated in Figures 1 and 2, this motorized drive device comprising an electromechanical actuator according to the invention and a winding tube;

[0043] [Fig 4] Figure 4 is a schematic cross-sectional view of the electromechanical actuator illustrated in Figure 3, along a cutting plane passing through an axis of rotation of the electromechanical actuator, this schematic cross-sectional view being locally interrupted at two parts of the electromechanical actuator; and

[0044] [Fig 5] Figure 5 is a schematic view illustrating part of an electrical diagram of an electromechanical actuator control unit, illustrated in Figures 3 and 4.

[0045] First, with reference to Figures 1 and 2, we describe an installation 6 comprising a closing, shading, or solar protection device 3 according to an embodiment of the invention. This installation 6, installed in a building B, has an opening 1, in which a window or door (not shown) is located. This installation 6 is equipped with a screen 2 belonging to the closing, shading, or solar protection device 3, in particular a motorized blind.

[0046] The closing, shading, or sun protection device 3 is hereinafter referred to as the "shading device." The shading device 3 comprises the screen 2.

[0047] The blackout device 3 may be a blind, in particular a blind comprising a roller fabric, a blind comprising a pleated or honeycomb screen, a blind with adjustable slats, or a roller shutter. The present invention applies to all types of blackout devices.

[0048] Here, installation 6 includes the blackout device 3.

[0049] With reference to figures 1 and 2, a roller blind conforming to an embodiment of the invention is described.

[0050] The obscuring device 3 includes a motorized drive device 5. The motorized drive device 5 includes an electromechanical actuator 11 illustrated in figures 3 and 4.

[0051] The screen 2 is configured to be moved, or is moved, by means of the motorized drive device 5 and, more particularly, the electromechanical actuator 11. Advantageously, the motorized drive device 5 and, consequently, the shading device 3 further comprises a winding tube 4. In addition, the winding tube 4 is arranged so as to be driven in rotation by the electromechanical actuator 11.

[0052] Here, screen 2 can be rolled up onto the winding tube 4.

[0053] Thus, the screen 2 of the occultation device 3 is wound on the winding tube 4 or unwound around it, the winding tube 4 being driven by the motorized drive device 5, in particular by the electromechanical actuator 11.

[0054] In this way, screen 2 is mobile between a rolled-up position, particularly high, and an unrolled position, particularly low, and vice versa.

[0055] The screen 2 of the shading device 3 is a closing, shading and / or sun protection screen, rolling and unrolling around the winding tube 4, the inner diameter of which is greater than the outer diameter of the electromechanical actuator 11, so that the electromechanical actuator 11 can be inserted into the winding tube 4, when assembling the shading device 3.

[0056] Advantageously, the occultation device 3 includes a holding device 9, 23.

[0057] Advantageously, the retaining device 9, 23 can include two supports 23. One support 23 is disposed at each end of the winding tube 4, particularly in an assembled configuration of the blackout device 3.

[0058] Thus, the winding tube 4 is held by means of the supports 23. Only one of the supports 23 is visible in figure 1 and they are not shown in figure 2. The supports 23 allow the blackout device 3 to be mechanically linked to the structure of building B, in particular to a wall M of building B.

[0059] Advantageously, the retaining device 9, 23 can include a box 9. In addition, the winding tube 4 and at least part of the screen 2 are housed inside the box 9, particularly in the assembled configuration of the blackout device 3.

[0060] Generally, the box 9 is positioned above the opening 1, or in the upper part of the opening 1.

[0061] Here and as illustrated in figure 1, the supports 23 are also housed inside the box 9.

[0062] Advantageously, the box 9 includes two cheeks 10, as illustrated in Figure 2. One cheek 10 is arranged at each end of the box 9, in particular in the assembled configuration of the blackout device 3. Alternatively, shown in Figure 2, the winding tube 4 is held via the box 9, in particular via the cheeks 10 of the box 9, without using supports, such as the supports 23 mentioned above.

[0063] Advantageously, the blackout device 3 can also include two side guides 26, as illustrated only in Figure 2. Each side guide 26 includes a groove 29. Each groove 29 of one of the side guides 26 cooperates, or is configured to cooperate, with a side edge 2a of the screen 2, particularly in the assembled configuration of the blackout device 3, so as to guide the screen 2, when the screen 2 is wound and unwound around the winding tube 4.

[0064] The electromechanical actuator 11 is, for example, of the tubular type. This allows the winding tube 4 to be rotated around an axis of rotation X, so as to move, in particular unwind or wind up, the screen 2 of the occulting device 3.

[0065] In an assembled state of the occulting device 3, the electromechanical actuator 11 is inserted into the winding tube 4.

[0066] Advantageously, the occultation device 3 further includes a load bar 8 for exerting tension on the screen 2. The load bar 8 can also be called the end end blade.

[0067] The roller blind, which forms the blackout device 3, comprises a fabric, forming the screen 2 of the roller blind 3. A first end of the screen 2, in particular the upper end of the screen 2, in the assembled configuration of the blackout device 3, is fixed to the roller tube 4. In addition, a second end of the screen 2, in particular the lower end of the screen 2, in the assembled configuration of the blackout device 3, is fixed to the weight bar 8.

[0068] Here, the canvas forming screen 2 is made from a textile material.

[0069] In one embodiment, not shown, the first end of the screen 2 has a hem through which a rod, particularly made of plastic, is inserted. This hem at the first end of the screen 2 is created by stitching the fabric forming the screen 2. When assembling the screen 2 onto the roller tube 4, the hem and the rod at the first end of the screen 2 are slid into a groove, not shown, formed on the outer face of the roller tube 4, in particular along the entire length of the roller tube 4, so as to secure the screen 2 to the roller tube 4 and to allow the screen 2 to be wound and unwound around the roller tube 4. The method of attaching the screen 2 to the roller tube 4 is not limiting and may be different.It can be implemented, for example, by means of an adhesive or one or more joints fixed, in particular by screwing or riveting, to the winding tube 4.

[0070] Regardless of the embodiment, the first end of the screen 2 is positioned at the level of the retaining device 9, 23.

[0071] In the case of a roller blind, the rolled-up high position corresponds to a predetermined upper limit position, or to the weight bar 8 of the screen 2 being pressed against an edge of the casing 9 of the roller blind 3, and the rolled-up low position corresponds to a predetermined lower limit position, or to the weight bar 8 of the screen 2 being pressed against a threshold 7 of the opening 1, or to the complete unrolling of the screen 2.

[0072] Advantageously, the motorized drive device 5 is controlled by a control unit. The control unit can be, for example, a local control unit 12 or a central control unit 13.

[0073] Advantageously, the local control unit 12 can be connected, via wired or wireless connection, to the central control unit 13.

[0074] Advantageously, the central control unit 13 can control the local control unit 12, as well as other similar local control units distributed throughout building B.

[0075] The motorized drive device 5 is preferably configured to execute movement commands, including unwinding or rolling, of the screen 2 of the shading device 3, which may be issued, in particular, by the local control unit 12 or the central control unit 13.

[0076] Installation 6 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.

[0077] Control means for the electromechanical actuator 11, enabling the movement of the screen 2 of the occulting device 3, consist of at least one control unit 15, in particular an electronic control unit.

[0078] This control unit 15 belongs to the motorized drive device 5 and, more particularly, to the electromechanical actuator 11. It is capable of starting an electric motor 16 of the electromechanical actuator 11 and, in particular, of enabling the supply of electrical energy to the electric motor 16.

[0079] Thus, the control unit 15 controls, in particular, the electric motor 16, so as to open or close the screen 2, as described previously.

[0080] The control means for the electromechanical actuator 11 include hardware and / or software means.

[0081] As a non-limiting example, the hardware may include at least one microcontroller 30, as illustrated in Figure 2.

[0082] Here, the control unit 15 includes the microcontroller 30.

[0083] Advantageously, the control unit 15 further includes a first communication module 27, as illustrated in Figure 2, 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 motorized drive device 5.

[0084] Advantageously, the first communication module 27 of the control unit 15 is wireless. In particular, the first communication module 27 is configured to receive radio control commands.

[0085] Advantageously, the first communication module 27 can, as a complement or alternative, allow the reception of command orders transmitted by wired means.

[0086] 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 building B or outside building B, 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 building B.

[0087] 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, as illustrated in Figure 2, so as to control 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.

[0088] The control unit 15 can be operated from the local control unit 12 and / or the central control unit 13. The local control unit 12 and / or the central control unit 13 are equipped with a control keypad. The control keypad of the local control unit 12 or the central control unit 13 includes one or more selection elements 14 and, optionally, one or more display elements 34. By way of non-limiting example, the selection elements may be pushbuttons and / or touch-sensitive keys. The display elements may be light-emitting diodes and / or a display, for example, LCD (Liquid Crystal Display) or TFT (Thin Film Transistor). The selection and display elements may also be implemented using a touchscreen.

[0089] Advantageously, the local control unit 12 and / or the central control unit 13 includes at least one second communication module 36.

[0090] Thus, the second communication module 36 of the local control unit 12 or of the central control unit 13 is configured to transmit, in other words, sends out, control orders, in particular by wireless means, for example radioelectric, and / or by wired means.

[0091] In addition, the second communication module 36 of the local control unit 12 or of the central control unit 13 can also be configured to receive, in other words receives, control orders, in particular through the same means.

[0092] Advantageously, the second communication module 36 of the local control unit 12 or of the central control unit 13 is configured to communicate, in other words, communicates, with the first communication module 27 of the control unit 15.

[0093] 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.

[0094] 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 fixed to a wall M of building B or to the face of a window or door frame. A mobile control point can be a remote control, a smartphone, or a tablet.

[0095] Advantageously, the local control unit 12 and / or the central control unit 13 further includes a controller 35.

[0096] The motorized drive device 5, in particular the control unit 15, is preferably configured to execute movement commands, including closing and opening, of the screen 2 of the shading device 3. These commands can be issued, in particular, by the local control unit 12 or by the central control unit 13.

[0097] 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.

[0098] Advantageously, the occultation installation 6 also includes at least one sensor, not shown.

[0099] As an addition or alternative, the sensor can be integrated into the weather station.

[0100] 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.

[0101] Advantageously, the sensor can be, for example, a light sensor, a temperature sensor, a humidity sensor or a wind sensor.

[0102] Thus, the motorized drive device 5 can also be controlled automatically by receiving a command order corresponding to at least one signal from the sensor.

[0103] In addition or alternatively, the motorized drive device 5 can also be controlled automatically by receiving a command order corresponding to at least one signal from a clock, not shown, of the control unit 15, in particular the microcontroller 30.

[0104] 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.

[0105] We now describe in more detail and with reference to figures 3 to 5 the motorized drive device 5, including the electromechanical actuator 11, belonging to the installation 6 and, more particularly, to the occulting device 3 illustrated in figures 1 and 2.

[0106] The electromechanical actuator 11 includes the electric motor 16.

[0107] The electric motor 16 comprises a rotor 16a and a stator 16b, as illustrated in Figure 4. Here, the rotor 16a and the stator 16b are positioned coaxially around the axis of rotation X, which is also the axis of rotation of the winding tube 4 in the mounted configuration of the motorized drive device 5.

[0108] Advantageously, the electric motor 16 can be of the electronically commutated brushless type, also called "BLDC" (acronym for the Anglo-Saxon term BrushLess Direct Current) or "permanent magnet synchronous", of the direct current type or of the asynchronous type.

[0109] Advantageously, the rotor 16a of the electric motor 16 includes a shaft 53.

[0110] Advantageously, the tree 53 comprises a first end 53a and a second end 53b. The second end 53b is opposite the first end 53a.

[0111] Advantageously, the electromechanical actuator 11 further includes a reducer 19.

[0112] The reducer 19 is coupled, in other words is configured to be coupled, with the electric motor 16, in particular in an assembled configuration of the electromechanical actuator 11.

[0113] Advantageously, the electromechanical actuator 11 further includes a torque transmission device 31.

[0114] Here, the torque transmission device 31 consists of a single-piece component, which can also be called a cardan joint.

[0115] Here, an input shaft 43 of the reducer 19 is coupled, or rather configured to be coupled, with the rotor 16a of the electric motor 16, in particular with the shaft 53, via the torque transmission device 31, in particular in the assembled configuration of the electromechanical actuator 11.

[0116] Advantageously, the reducer 19 includes one or more reduction stages 37, 38. The reduction stage 37, 38, one of the reduction stages 37, 38 or each of the reduction stages 37, 38 may be of epicycloidal type.

[0117] The number of reduction stages in the reducer is not limited. The number of reduction stages can be one, two, or three or more.

[0118] Advantageously, the electromechanical actuator 11 further comprises a housing 17, in particular tubular.

[0119] Here, the electric motor 16 and, possibly, the reducer 19 and the torque transmission device 31 are housed, in other words mounted, inside the casing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0120] Here, the housing 17 is hollow. The housing 17 comprises a first end 17a and a second end 17b. The second end 17b is opposite the first end 17a.

[0121] Here, the housing 17 of the electromechanical actuator 11 is cylindrical in shape, in particular of revolution around the axis of rotation X, and is open at each of its ends 17a, 17b.

[0122] Advantageously, the housing 17 is a tube with a circular cross-section.

[0123] Here, the housing 17 is made of a metallic material.

[0124] The material of the electromechanical actuator housing is not limited and can vary. In particular, it can be a plastic material.

[0125] Advantageously, the electromechanical actuator 11 further includes a crown, not shown, which can also be called a sleeve.

[0126] The crown is disposed, or rather configured to be disposed, in the vicinity of the first end 17a of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0127] The electromechanical actuator 11 is configured to be electrically connected, that is to say, is electrically connected, to at least one electrical power supply source 24, as illustrated in Figure 5.

[0128] Advantageously, one or more of the sources of electrical power supply 24 is, for example, a mains electrical power supply network.

[0129] Alternatively, the or one of the electrical power supply sources 24 is an electrical power supply network known as "PoE" (acronym for the Anglo-Saxon term Power over Ethernet), and / or a battery, which can be rechargeable, in particular by means of a photovoltaic panel and / or a charger, not shown, or through the electrical power supply network.

[0130] Advantageously, the motorized drive device 5 and, more particularly, the electromechanical actuator 11 further includes an electrical power cable 18, as illustrated in Figures 2 and 3.

[0131] Advantageously, the control unit 15 can be supplied with electrical power by means of the power cable 18 electrically connected to the or one of the electrical power supply sources 24.

[0132] Thus, the power supply cable 18 enables the electromechanical actuator 11, in particular the control unit 15 and the electric motor 16, to be supplied with electrical energy from the power supply source 24. Advantageously, the electromechanical actuator 11 further comprises an output shaft 20. In addition, the output shaft 20 of the electromechanical actuator 11 is disposed, or is configured to be disposed, in the vicinity of the second end 17b of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0133] Advantageously, the output shaft 20 of the electromechanical actuator 11 is disposed inside the winding tube 4 and at least partly outside the housing 17 of the electromechanical actuator 11.

[0134] Advantageously, one end of the output shaft 20 of the electromechanical actuator 11 is projecting from the housing 17 of the electromechanical actuator 11, in particular from the second end 17b of the housing 17.

[0135] Advantageously, the output shaft 20 of the electromechanical actuator 11 is configured to drive a connecting element, not shown, which is attached to the winding tube 4. The connecting element is, for example, in the form of a wheel. This connecting element is rotationally fixed, around the axis of rotation X, to both the output shaft 20 and the winding tube 4.

[0136] When the electromechanical actuator 11 is switched on, the electric motor 16 and the reducer 19 drive the output shaft 20 of the electromechanical actuator 11 in rotation around the axis of rotation X. In addition, the output shaft 20 of the electromechanical actuator 11 drives the winding tube 4 in rotation around the axis of rotation X via the connecting element.

[0137] Thus, the winding tube 4 causes the screen 2 of the occulting device 3 to rotate, so as to open or close the opening 1.

[0138] Advantageously, the electromechanical actuator 11 further includes a brake 25.

[0139] The brake 25 is configured to brake and / or to lock in rotation the output shaft 20 of the electromechanical actuator 11, so as to regulate the rotational speed of the winding tube 4, during a movement of the screen 2, and to keep the winding tube 4 locked, when the electromechanical actuator 11 is electrically deactivated.

[0140] Advantageously, the brake 25 is housed, in other words mounted, inside the casing 17 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11.

[0141] Here, brake 25 is a spring brake.

[0142] Alternatively, and not shown, the brake 25 is a cam brake, a magnetic brake, or an electromagnetic brake. Here, and as illustrated in Figure 4, the brake 25 is configured to be disposed, or rather is disposed, particularly in the assembled configuration of the electromechanical actuator 11, between two reduction stages 37, 38 of the reducer 19, specifically between a first reduction stage 37 and a second reduction stage 38 of this reducer 19.

[0143] In an alternative, not shown, the brake 25 is configured to be disposed, in other words is disposed, in particular in the assembled configuration of the electromechanical actuator 11, between the control unit 15 and the electric motor 16, in other words at the input of the electric motor 16, or between the reducer 19 and the output shaft 20 of the electromechanical actuator 11, in other words at the output of the reducer 19, or again between the electric motor 16 and the reducer 19, that is to say at the output of the electric motor 16.

[0144] Advantageously, the electromechanical actuator 11 and, more particularly, the control unit 15 further includes a device, not shown, for detecting end of travel and / or obstacle, during the movement of the screen 2. This detection device can be mechanical or electronic.

[0145] Advantageously, the end-of-travel and / or obstacle detection device is implemented by means of the microcontroller 30 of the control unit 15 and, in particular, by means of an algorithm implemented by this microcontroller 30.

[0146] The winding tube 4 is driven in rotation around the axis of rotation X and the housing 17 of the electromechanical actuator 11, supported by two pivot joints. The first pivot joint is located at one end of the winding tube 4 by means of the ring. The ring thus provides a bearing. The second pivot joint, not shown, is located at the other end of the winding tube 4, opposite the first end.

[0147] The crown forms, in other words is configured to form or constitute, a bearing for the rotational guidance of the winding tube 4, around the housing 17 of the electromechanical actuator 11, in particular in an assembled configuration of the motorized drive device 5 and, consequently, of the occulting device 3.

[0148] Advantageously, the electromechanical actuator 11 further includes a torque support 21.

[0149] Here, the torque support 21 is arranged at the first end 17a of the housing 17 of the electromechanical actuator 11, in particular in the assembled configuration of the electromechanical actuator 11.

[0150] The torque support 21 allows the forces exerted by the electromechanical actuator 11 to be absorbed, in particular the torque exerted by the electromechanical actuator 11, with respect to the structure of building B. The torque support 21 advantageously allows the forces exerted by the winding tube 4 to be absorbed, in addition, in particular the weight of the winding tube 4, the electromechanical actuator 11 and the screen 2, and ensures that these forces are absorbed by the structure of building B.

[0151] Thus, the torque support 21 allows the electromechanical actuator 11 to be fixed on the retaining device 9, 23, in particular to one of the supports 23 or to one of the cheeks 10 of the casing 9.

[0152] Advantageously, the torque support 21 protrudes at the first end 17a of the housing 17 of the electromechanical actuator 11.

[0153] Advantageously, the torque support 21 closes, in other words is configured to close, the first end 17a of the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0154] Furthermore, the torque support 21 of the electromechanical actuator 11 can support at least part of the control unit 15.

[0155] Advantageously, the torque support 21 is fixed to the housing 17 by means of one or more fasteners, not shown, particularly in the assembled configuration of the electromechanical actuator 11. The fastener(s) may be, in particular, bosses, fixing screws, snap-fit ​​fasteners, grooves fitted into notches or a combination of these different fasteners.

[0156] Advantageously, the torque support 21 comprises a first part 21a, which can also be called a "fixed point", and a second part 21b, which can also be called an "actuator head".

[0157] Advantageously, the first part 21a of the torque support 21 is assembled, or rather configured to be assembled, with the housing 17, particularly in the assembled configuration of the electromechanical actuator 11. Furthermore, the second part 21b of the torque support 21 is configured to be assembled, or rather is assembled, with the retaining device 9, 23, particularly in an assembled configuration of the electromechanical actuator 11 in the concealing device 3.

[0158] In one embodiment, the second part 21b of the torque support 21 is assembled, or rather configured for assembly, onto the first part 21a of the torque support 21, particularly in the assembled configuration of the electromechanical actuator 11. In this case, the second part 21b of the torque support 21 is assembled onto the first part 21a of the torque support 21 by means of assembly elements. Thus, the torque support 21 consists of at least two separate parts, each forming the first and second parts 21a and 21b of the torque support 21, respectively.

[0159] In this way, the second part 21b of the torque support 21 can be interchangeable with the first part 21a of the torque support 21, in particular depending on the shape and type of the retaining elements, not shown, of the retaining device 9, 23.

[0160] In another embodiment, not shown, the torque support 21 can be made of a single piece, in other words a single piece, forming the first and second parts 21a, 21b of the torque support 21.

[0161] Advantageously, the second part 21b of the couple support 21 can have different external shapes, including a fluted shape, known as "star-shaped", as illustrated in Figure 4, i.e. including reliefs on its contour, or a round shape, i.e. without reliefs on its contour, as illustrated in Figure 3.

[0162] Advantageously, at least a portion of the first part 21a of the torque support 21 is generally cylindrical in shape and is disposed, or rather configured to be disposed, inside the housing 17, particularly in the assembled configuration of the electromechanical actuator 11.

[0163] Advantageously, an outside diameter 021 of at least a portion of the second part 21b of the torque support 21 is greater than an outside diameter 017 of the housing 17.

[0164] Advantageously, the torque support 21 further includes a stop 33. In addition, the stop 33 is supported, that is to say, is configured to be supported, against the housing 17, at the level of the first end 17a of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11.

[0165] Thus, the stop 33 of the torque support 21 allows the sinking of the first part 21a of the torque support 21 into the housing 17, along the direction of the axis of rotation X.

[0166] Here, the stop 33 of the torque support 21 includes a shoulder. More specifically, it is made in the form of a collar, in particular cylindrical in shape and with a straight generatrix.

[0167] In one embodiment, the ring is disposed or inserted, in other words is configured to be disposed or inserted, around the torque support 21, in particular the first part 21a of the torque support 21, especially in the assembled configuration of the electromechanical actuator 11. In this case, the ring is mounted freely to rotate around the torque support 21, in particular the first part 21a of the torque support 21.

[0168] Alternatively, not shown, the crown is disposed or inserted, in other words is configured to be disposed or inserted, around a part of the housing 17, in particular in the assembled configuration of the electromechanical actuator 11. In this case, the crown is mounted freely to rotate around the housing 17.

[0169] In another variant, not shown, the ring is disposed or inserted, in other words is configured to be disposed or inserted, on the one hand, around the torque support 21 and, on the other hand, around a part of the housing 17 of the electromechanical actuator 11, in particular the first end 17a of the housing 17, especially in the assembled configuration of the electromechanical actuator 11. In such a case, the ring can be mounted freely in rotation, on the one hand, around the torque support 21 and, on the other hand, around the housing 17 of the electromechanical actuator 11.

[0170] Advantageously, the torque support 21 further includes a cover 22, as illustrated only in Figure 3. The cover 22 is mounted, or rather configured to be mounted, on the torque support 21, in particular on the second part 21b of the torque support 21, especially in the assembled configuration of the electromechanical actuator 11.

[0171] Advantageously, the control unit 15 is disposed at least partly inside the housing 17 of the electromechanical actuator 11.

[0172] Furthermore, the control unit 15 can be disposed at least partly outside the housing 17 of the electromechanical actuator 11 and, in particular, mounted in the torque support 21 or in one of the supports 23.

[0173] Advantageously, the control unit 15 comprises a first electronic board 15a and a second electronic board, not shown.

[0174] Here, the first electronic board 15a of the control unit 15 is arranged inside the housing 17 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11. In addition, the second electronic board is arranged inside the torque support 21 of the electromechanical actuator 11, particularly in the assembled configuration of the electromechanical actuator 11.

[0175] Advantageously, the first electronic board 15a is configured to control the electric motor 16. In addition, the second electronic board is configured to, in particular, access parameterization and / or configuration functions of the electromechanical actuator 11, by means of selection devices 57, only one of which is shown in Figure 3, and, possibly, display devices, not shown.

[0176] Here, the control unit 15, in particular each of the first and second electronic boards 15a and equivalent, is supplied with electrical energy by means of the power supply cable 18.

[0177] Advantageously, the torque support 21 includes, or rather integrates, at least one selection device 57, as illustrated in Figure 3, in particular a button, which may be, for example, of the push-button or magnetic type. Furthermore, the selection device or devices 57 are configured, in particular, to adjust the electromechanical actuator 11 through one or more configuration modes, to pair one or more control units 12, 13 with the electromechanical actuator 11, to reset one or more parameters, which may be, for example, a limit switch position, to reset the paired control unit(s) 12, 13, or to control the movement of the screen 2.

[0178] Advantageously, the torque support 21 includes, or rather integrates, at least one display device, not shown. Furthermore, the display device(s) is configured, in particular, to display a visual indication, which may, for example, represent an operating mode of the electromechanical actuator 11, in particular a configuration mode or a control mode, or a state of a component of the motorized drive device 5.

[0179] Advantageously, the electromechanical actuator 11 further includes a counting device 59. The counting device 59 is configured to cooperate, that is to say, cooperates, with the control unit 15. In addition, the counting device 59 and the control unit 15 are configured to determine a position, which may be called "current", of the screen 2.

[0180] Advantageously, the control unit 15 is configured to monitor at least one signal from the counting device 59 at a predetermined frequency, notably depending on the position of the screen 2.

[0181] Here, the counting device 59 is of the magnetic type.

[0182] In such a case, the counting device 59 may include an encoder wheel 60 and one or more sensors 61, in particular Hall effect sensors.

[0183] Here, the encoder wheel 60 is connected to the shaft 53 of the rotor 16a of the electric motor 16, specifically at the first end 53a of the shaft 53. Furthermore, the sensor(s) 61 are mounted on an electronic board of the control unit 15, specifically on a third electronic board 15c, or, alternatively, on the first electronic board 15a. Thus, the counting device 59 allows the number of revolutions made by the rotor 16a of the electric motor 16 to be determined.

[0184] Here, the counting device 59 includes three sensors 61, of which only two are visible in figure 4.

[0185] The number of sensors is not limited and can vary. It can be, for example, one or two.

[0186] Alternatively, not shown, the counting device 59 may be without sensors 61. In this case, the counting device 59 is configured to, in cooperation with the control unit 15, analyze the control signals for supplying electrical power to the electric motor 16 and determine a position, which may be called "current", of the rotor 16a of the electric motor 16 and, consequently, of the output shaft 20 of the electromechanical actuator 11 and the winding tube 4.

[0187] Alternatively, not shown, the counting device 59 allows the number of revolutions made by the output shaft 20 of the electromechanical actuator 11 to be determined.

[0188] In another variant or as an addition, the ring gear includes, on its inner face, teeth (not shown) configured to cooperate with a pinion (not shown) installed inside the torque support 21 or, alternatively, inside the housing 17 of the electromechanical actuator 11. In this variant, the encoder wheel 60 is connected to the pinion, in particular by means of a shaft. Thus, the teeth of the ring gear are configured to drive the pinion in rotation, so as to count the number of revolutions of the winding tube 4. In this case, the teeth of the ring gear and the pinion form part of the counting device 59.

[0189] The counting device 59 also allows the direction of rotation of the winding tube 4 to be determined and / or the end-of-travel positions of the screen 2 to be managed.

[0190] The type of counting device is not limiting and can be different, in particular optical, for example an encoder equipped with one or more optical sensors, or time-based.

[0191] Advantageously, when the electromechanical actuator 11 is supplied with electrical energy from the power supply 24 and when the first communication module 27 of the control unit 15 receives a succession of control commands from at least one of the control units 12, 13, the electric motor 16 can only be electrically activated for a predetermined maximum operating time period Ton. By way of non-limiting example, a threshold value for the predetermined maximum operating time period Ton during which the electric motor 16 is electrically activated is several minutes, in particular on the order of six minutes.

[0192] The threshold value of the predetermined maximum operating time period Ton corresponds to a thermal operating limit of the electric motor 16.

[0193] In one example of an implementation, the predetermined maximum operating time period Ton is a continuous time period, in other words without interruption.

[0194] Alternatively, the predetermined maximum operating time period Ton is a succession of electrical activation time periods of the electric motor 16, which are interrupted, for a predetermined time interval.

[0195] Advantageously, when the electromechanical actuator 11 is supplied with electrical energy from the power supply 24, and if the threshold value of the predetermined maximum operating time period Ton is reached, the control unit 15 inhibits the operation of the electric motor 16 for a predetermined inhibition time period Toff. The inhibition of the electric motor 16 by the control unit 15 consists of not executing a command to the electromechanical actuator 11 received by the first communication module 27 of the control unit 15, during the predetermined inhibition time period Toff, so as to protect the electromechanical actuator 11.

[0196] A current value for the operating time period of the electric motor 16 corresponds to an estimated temperature value of the electric motor 16, in particular of its winding.

[0197] Estimating the temperature value of the electric motor 16 via the current value of the operating time period of the electric motor 16 eliminates the need for a sensor to measure the temperature value of the electric motor 16.

[0198] Thus, in the case where the current value of the operating time period of the electric motor 16 is greater than or equal to the threshold value of the predetermined maximum operating time period Ton, the control unit 15 inhibits the operation of the electric motor 16 during the predetermined inhibition time period Toff.

[0199] Advantageously, the threshold value of the predetermined maximum operating time period Ton is defined so that the temperature of the electric motor 16, in particular of its winding, remains below, in other words does not reach, a maximum operating temperature of the latter.

[0200] Furthermore, when the predetermined inhibition time period Toff has elapsed and when the first communication module 27 of the control unit 15 receives a new command order, the electric motor 16 is electrically activated, so as to execute this command order.

[0201] Furthermore, as long as the threshold value of the predetermined maximum operating time period Ton is not reached, the control unit 15 authorizes the operation of the electric motor 16. The authorization of the operation of the electric motor 16 by the control unit 15 consists of executing a command order of the electromechanical actuator 11 received by the first communication module 27 of the control unit 15.

[0202] Thus, in the case where the current value of the operating time period of the electric motor 16 is strictly less than the threshold value of the predetermined maximum operating time period Ton, the control unit 15 authorizes the operation of the electric motor 16. The authorization of the operation of the electric motor 16 by the control unit 15 consists of executing a command order of the electromechanical actuator 11 received by the first communication module 27 of the control unit 15.

[0203] Advantageously, in the case where the threshold value of the maximum predetermined operating time period Ton is reached and when the electromechanical actuator 11 is not supplied with electrical energy from the electrical power supply source 24, the control unit 15 implements, by means of a determining device 39, a determination of a power cut-off time period, during which the electromechanical actuator 11 is not supplied with electrical energy by the electrical power supply source 24.

[0204] Here, control unit 15 includes determination device 39.

[0205] The predetermined inhibition time period Toff corresponds to a thermal time counter, in other words to a predetermined cooling time period of the electric motor 16.

[0206] Here, a value of the predetermined time period of inhibition Toff during which the operation of the electric motor 16 is inhibited is several minutes, in particular greater than or equal to ten minutes.

[0207] Advantageously, the determining device 39 is implemented in the case where the electromechanical actuator 11 is supplied with electrical energy non-permanently, that is to say, is not supplied with electrical energy for certain periods of time. Such a configuration arises, in particular, in the case where the electromechanical actuator 11 is electrically connected to the local control unit 12 and where the local control unit 12 has a switching position in which the local control unit 12 is disconnected from the electrical power supply source 24, in particular from the mains power supply network, and, consequently, the electromechanical actuator 11 is also disconnected from the electrical power supply source 24.Another case where a power outage of the electromechanical actuator 11 from the electrical power supply source 24 can occur is when the electrical power supply source 4 is faulty.

[0208] Alternatively, the determining device 39 is implemented in the case where the electromechanical actuator 11 is continuously supplied with electrical energy, that is, supplied with electrical energy regardless of the time period. Such a configuration occurs, in particular, when the electromechanical actuator 11 is directly connected to the electrical power supply 24. However, a power outage affecting the electromechanical actuator 11 from the electrical power supply 24 can occur if the electrical power supply 24 fails.

[0209] With reference to Figure 5, we now describe part of an electrical diagram of the control unit 15, in particular the determination device 39, of the electromechanical actuator 11 illustrated in Figures 3 and 4, according to an embodiment of the invention.

[0210] The microcontroller 30 includes at least one input port 32.

[0211] Advantageously, the 30 microcontroller also includes a memory, not shown.

[0212] The determination device 39 includes at least a first switching element 40 and a timing circuit 41.

[0213] Advantageously, the first switching element 40 is a PNP type bipolar transistor (acronym for Positive-Negative-Positive).

[0214] Alternatively, not shown, the first switching element 40 is a field-effect transistor, in particular of the MOSFET type (acronym for the Anglo-Saxon expression "Metal Oxide Semiconductor Field Effect Transistor").

[0215] In another variant, not shown, the first switching element 40 is an NPN (Negative-Positive-Negative) bipolar transistor. The first switching element 40 is configured to be switched, that is, toggled, between an open state and a closed state, and vice versa. The first switching element 40 is switched to its open state when the electromechanical actuator 11 is not receiving electrical power from the power supply 24.

[0216] The first switching element 40 is electrically connected to the timing circuit 41. The timing circuit 41 is supplied with electrical energy when the first switching element 40 is switched to its closed state by the microcontroller 30.

[0217] The timing circuit 41 includes at least a first passive component 42 and a second passive component 44. In other words, each of the first and second passive components 42, 44 does not require an electrical power supply.

[0218] The first passive component 42 is configured so that the microcontroller 30 determines a period of time elapsed between two instants t1, t2, from a variation of a voltage supplied by the first passive component 42. In other words, the microcontroller 30 times the period of time elapsed between the two instants t1, t2.

[0219] The first passive component 42 is unloaded, or is configured to be unloaded, by the second passive component 44, when the first switching element 40 is switched into its open state.

[0220] The elapsed time period is defined by a first instant t1, corresponding to an instant of power cut to the electromechanical actuator 11 from the electrical power supply source 24, and by a second instant t2, corresponding to an instant of power supply to the electromechanical actuator 11 from the electrical power supply source 24. The second instant t2 is consecutive to the first instant t1.

[0221] The determination device 39 further includes at least one second switching element 45.

[0222] Advantageously, the second switching element 45 is a field-effect transistor, in particular of the MOSFET type.

[0223] Alternatively, not shown, the second switching element 45 is a bipolar transistor, either of the PNP or NPN type.

[0224] Advantageously, the second switching element 45 comprises:

[0225] - a first pin 62, which can also be called "source",

[0226] - a second pin 63, which can also be called the "drain", and

[0227] - a third pin 64, which can also be called the "gate". The second switching element 45 is configured to be switched, that is, toggled, between an open state and a closed state, and vice versa. The second switching element 45 is switched to its open state when the electromechanical actuator 11 is not receiving electrical power from the power supply 24.

[0228] In addition, the second switching element 45 is electrically connected, on the one hand, to the timing circuit 41 and, on the other hand, to the input port 32 of the microcontroller 30.

[0229] Thus, the electrical disconnection of the timing circuit 41 from the microcontroller 30, when the electromechanical actuator 11 is not supplied with electrical energy by the electrical power supply source 24, makes it possible to avoid an additional discharge of the first passive component 42 caused by the operation of the microcontroller 30, which is added to the discharge of the first passive component 42 through the second passive component 44.

[0230] In this way, the discharge of the first passive component 42 is controlled, since it only occurs through the second passive component 44.

[0231] Therefore, the control unit 15 ensures the reliability and accuracy of determining a power outage time period, during which the electromechanical actuator 11 is not supplied with electrical energy by the electrical power supply source 24.

[0232] Advantageously, the first passive component 42 is a capacitor and the second passive component 44 is a first resistor. The second passive component 44 is connected in parallel with the first passive component 42.

[0233] Advantageously, the capacitor is of the chemical type, in particular of the electrolytic type.

[0234] Advantageously, the first and second switching elements 40, 45 are switched respectively into their closed state by the microcontroller 30.

[0235] Advantageously, the first and second switching elements 40, 45 are switched respectively by default in their open state in the absence of an electrical control signal from the microcontroller 30, in particular in the case of a power outage of the electromechanical actuator 11 from the electrical power supply source 24.

[0236] Advantageously, the control unit 15, in particular a printed circuit board of the control unit 15, further includes a reference mass 75.

[0237] Advantageously, the timing circuit 41 further comprises a first connection point 76, a second connection point 77, and a third connection point 78. The first connection point 76 is electrically connected, on the one hand, to the first switching element 40 and, on the other hand, to the second connection point 77. The second connection point 77 is electrically connected, on the one hand, to the second switching element 45 and, on the other hand, to the first connection point 76. In addition, the third connection point 78 is electrically connected to the first passive component 42, the second passive component 44, and the reference ground 75 of the control unit 15.

[0238] Advantageously, the determining device 39 further comprises at least one diode 46. The diode 46 is electrically connected, on the one hand, to the first switching element 40 and, on the other hand, to the timing circuit 41 and, more particularly, to the first passive component 42. The diode 46 is forward-biased from the first switching element 40 to the timing circuit 41 and reverse-biased from the timing circuit 41 to the first switching element 40.

[0239] Thus, the diode 46 allows, in other words is configured to, protect the first switching element 40 from the discharge of the first passive component 42, in other words to prevent a return of electrical energy from the first passive component 42 to the first switching element 40, in particular during a power outage of the electromechanical actuator 11 from the electrical power supply source 24.

[0240] Advantageously, the determining device 39 further comprises at least one resistor 47, which may also be called a second resistor. The first switching element 40 is electrically connected to the timing circuit 41 through the second resistor 47 and the diode 46.

[0241] Thus, the second resistor 47 allows, in other words is configured to, limit a current value coming out of the first switching element 40.

[0242] Here, the second resistor 47 is arranged between the first switching element 40 and the diode 46.

[0243] Alternatively, not shown, the second resistor 47 is placed between diode 46 and timing circuit 41 and, more specifically, between diode 46 and the first passive component 42.

[0244] Advantageously, the determination device 39 further includes a measuring device 48. The measuring device 48 is disposed between the second switching element 45 and the input port 32 of the microcontroller 30.

[0245] Thus, the measuring device 48 allows for the measurement, or is configured to measure, at least one voltage value output from the second switching element 45. Advantageously, the measuring device 48 includes at least one voltage divider bridge 58.

[0246] Here, the voltage divider bridge 58 includes two resistors 49 and 50, which can also be called the third resistor 49 and the fourth resistor 50. The third resistor 49 is electrically connected to the fourth resistor 50. The voltage divider bridge 58 includes a midpoint 51. The midpoint 51 is located between the third resistor 49 and the fourth resistor 50.

[0247] Thus, the third and fourth resistors 49, 50 of the voltage divider bridge 58 allow us to measure, in other words to determine, a voltage value coming out of the second switching element 45, in particular through its second pin 63.

[0248] Here, the third resistor 49 is electrically connected to the second switching element 45, specifically to its second pin 63. In addition, the fourth resistor 50 is electrically connected to the reference ground 75 of the control unit 15.

[0249] Here, the input port 32 of the microcontroller 30 is a port for reading a voltage value coming out of the second switching element 45, which is measured by the measuring device 48. In other words, the input port 32 of the microcontroller 30 is configured to read, in other words, reads, a voltage value coming out of the second switching element 45, which is measured by the measuring device 48.

[0250] Advantageously, input port 32 of microcontroller 30 includes an analog-to-digital converter, not shown. In this case, the analog-to-digital converter is integrated into microcontroller 30.

[0251] Alternatively, and not shown, the input port 32 of the microcontroller 30 is electrically connected to an analog-to-digital converter. In this case, the analog-to-digital converter is a separate component from the microcontroller 30.

[0252] Advantageously, the determination device 39 further comprises a third switching element 52 and a fourth switching element 54. The first switching element 40 is switched to its closed state by the microcontroller 30 through the third switching element 52. In addition, the second switching element 45 is switched to its closed state by the microcontroller 30 through the fourth switching element 54.

[0253] Advantageously, each of the third and fourth switching elements 52, 54 is a bipolar transistor, in particular of the NPN type.

[0254] Alternatively, not shown, each of the third and fourth switching elements 52, 54 is a PNP type bipolar transistor.

[0255] Advantageously, each of the first, third, and fourth switching elements 40, 52, 54 comprises:

[0256] - a first pin 40a, 52a, 54a, which can also be called "base" or "control pin",

[0257] - a second pin 40b, 52b, 54b, which can also be called the "collector" or "input pin", and

[0258] - a third pin 40c, 52c, 54c, which can also be called "emitter" or "output pin".

[0259] Advantageously, the determination device 39 further comprises a first biasing circuit 65 and a second biasing circuit 66.

[0260] Here, each of the first and second bias circuits 65, 66 includes two resistors 67, 68, 69, 70, called bias resistors.

[0261] Advantageously, the first biasing circuit 65 includes a fifth resistor 67 and a sixth resistor 68. The fifth resistor 67 is electrically connected to the sixth resistor 68. The first biasing circuit 65 further includes a connection point 71, which can also be called the fourth connection point. The fourth connection point 71 is located between the fifth resistor 67 and the sixth resistor 68.

[0262] Advantageously, the second biasing circuit 66 includes a seventh resistor 69 and an eighth resistor 70. The seventh resistor 69 is electrically connected to the eighth resistor 70. The second biasing circuit 66 further includes a connection point 72, which can also be called the fifth connection point. The fifth connection point 72 is located between the seventh resistor 69 and the eighth resistor 70.

[0263] Advantageously, the microcontroller 30 further includes a first output port 55, which can also be called a load control port, and a second output port 56, which can be called a read control port. The first output port 55 is configured to enable and disable a load control signal. Furthermore, the second output port 56 is configured to enable and disable a read control signal.

[0264] Advantageously, the determination device 39 further includes a ninth resistor 73. The ninth resistor 73 is electrically connected, on the one hand, to the third switching element 52, in particular to its first pin 52a, and, on the other hand, to the first output port 55 of the microcontroller 30.

[0265] Advantageously, the first pin 52a of the third switching element 52 is electrically connected to the first output port 55 of the microcontroller 30. The second pin 52b of the third switching element 52 is electrically connected to the first pin 40a of the first switching element 40, via the sixth resistor 68. In addition, the third pin 52c of the third switching element 52 is electrically connected to the reference ground 75 of the control unit 15.

[0266] Here, the first pin 52a of the third switching element 52 is configured to control, or command, the third switching element 52, from a load control signal from the first output port 55 of the microcontroller 30.

[0267] Here, activating the load control signal switches the first switching element 40 from its open state to its closed state, specifically by switching the third switching element 52 from its open state to its closed state. Furthermore, deactivating the load control signal switches the first switching element 40 from its closed state to its open state, specifically by switching the third switching element 52 from its closed state to its open state.

[0268] Advantageously, the determination device 39 further includes a tenth resistor 74. The tenth resistor 74 is electrically connected, on the one hand, to the fourth switching element 54, in particular to its first pin 54a, and, on the other hand, to the second output port 56 of the microcontroller 30.

[0269] Advantageously, the first pin 54a of the fourth switching element 54 is electrically connected to the second output port 56 of the microcontroller 30. The second pin 54b of the fourth switching element 54 is electrically connected to the third pin 64 of the second switching element 45, via the eighth resistor 70. In addition, the third pin 54c of the fourth switching element 54 is electrically connected to the reference ground 75 of the control unit 15.

[0270] Here, the first pin 54a of the fourth switching element 54 is configured to control, or command, the fourth switching element 54, from a read control signal from the second output port 56 of the microcontroller 30.

[0271] Advantageously, when the read control signal is activated by the microcontroller 30, a measurement of a voltage value coming out of the second switching element 45 is implemented by the measuring device 48.

[0272] Here, activating the read control signal switches the second switching element 45 from its open state to its closed state, specifically by switching the fourth switching element 54 from its open state to its closed state. Furthermore, deactivating the read control signal switches the second switching element 45 from its closed state to its open state, specifically by switching the fourth switching element 54 from its closed state to its open state.

[0273] Thus, the second switching element 45 is switched to its closed state only when the read control signal is activated, in other words when a measurement of a voltage value coming out of the second switching element 45 is implemented by the measuring device 48.

[0274] In this way, the second switching element 45 is switched to its open state as soon as the read control signal is deactivated, in other words as soon as the electromechanical actuator 11 is supplied with electrical energy and as long as the read control signal is not activated.

[0275] Advantageously, the third pin 40c of the first switching element 40 is electrically connected to the power supply 24 and to the fifth resistor 67. The second pin 40b of the first switching element 40 is electrically connected to the first passive component 42 and, more specifically, to the second resistor 47. Furthermore, the first pin 40a of the first switching element 40 is electrically connected to the third switching element 52, in this case to its second pin 52b, and, more specifically, to the fifth and sixth resistors 67, 68.

[0276] Thus, the first pin 40a of the first switching element 40 is supplied with electrical energy as soon as a voltage is present in the first biasing circuit 65, that is, as soon as the load control signal is emitted by the microcontroller 30 from its first output port 55, which causes the third switching element 52 to close.

[0277] In this way, supplying electrical power to the first pin 40a of the first switching element 40 causes the first switching element 40 to close.

[0278] Therefore, the first passive component 42 is supplied with electrical energy from the electrical power supply source 24 through the first switching element 40.

[0279] Advantageously, the first pin 62 of the second switching element 45 is electrically connected, on the one hand, to the first switching element 40, in particular through the second resistor 47, the diode 46 and at least one branch of the timing circuit 41, and, on the other hand, to the ninth resistor 69. The second pin 63 of the second switching element 45 is electrically connected to the measuring device 48 and, more particularly, to the third resistor 49. Furthermore, the third pin 64 of the second switching element 45 is electrically connected to the fourth switching element 54, in this case to its second pin 54b, and, more particularly, to the ninth and tenth resistors 69, 70.

[0280] Thus, the third pin 64 of the second switching element 45 is supplied with electrical energy as soon as a voltage is present in the second biasing circuit 66, that is, as soon as the read control signal is emitted by the microcontroller 30 from its second output port 56, which causes the fourth switching element 54 to close.

[0281] In this way, the supply of electrical energy to the third pin 64 of the second switching element 45 causes the second switching element 45 to close.

[0282] Therefore, the input port 32 of the microcontroller 30 is supplied with electrical energy from the second passive component 42 through the second switching element 45, so as to measure the voltage value delivered by the second passive component 42.

[0283] Furthermore, the measurement of the voltage value delivered by the second passive component 42 is not altered by an additional resistance from the operation of the microcontroller 30 during the measurement.

[0284] As long as the electromechanical actuator 11 is supplied with electrical energy from the electrical power supply source 24 and the first switching element 40 is in its closed state, the first passive component 42 is kept charged at a voltage value.

[0285] Furthermore, when the electromechanical actuator 11 is not supplied with electrical energy from the electrical power supply source 24, the timing circuit 41 is electrically isolated from the other components of the control unit 15, by means of the first switching element 40 and the second switching element 45 switching respectively in their open state.

[0286] In this way, when the electromechanical actuator 11 is not supplied with electrical energy from the power supply 24, the first passive component 42 is only electrically connected to the second passive component 44, since the first and second switching elements 40, 45 electrically disconnect the other components of the control unit 15 from the first and second passive components 42, 44. Therefore, the electrical connection of the second passive component 44 to the first passive component 42, without the other components of the control unit 15 being electrically connected, constitutes a discharge circuit of the first passive component 42, whose discharge relationship of the first passive component 42 is predetermined and controlled, in particular by knowledge of the characteristics of the second passive component 44.

[0287] Following the restoration of power to the electromechanical actuator 11 from the electrical power supply source 24, the voltage value supplied by the first passive component 42 is measured by the measuring device 48, converted into an electrical signal and then read by the microcontroller 30, through its input port 32.

[0288] Thus, the value of the power cut-off time period, in other words the period of time elapsed between the first and second instants t1, t2, is determined by the microcontroller 30.

[0289] Next, the determined power cut-off time period value is compared to the predetermined Toff inhibition time period threshold value.

[0290] In the case where the threshold value of the predetermined maximum operating time period Ton has been determined to be reached before the interruption of the power supply to the electromechanical actuator 11 from the electrical power supply source 24 and where the value of the determined power interruption time period is strictly less than the threshold value of the predetermined inhibition time period Toff, the control unit 15 maintains the inhibition of the operation of the electric motor 16, in other words maintains the non-execution of a control order received by the first communication module 27 of the control unit 15, until the end of the flow of the predetermined inhibition time period Toff.

[0291] Here, the inhibition of the electric motor 16 is implemented by activating the read control signal, by the microcontroller 30 through its second output port 56, while keeping the load control signal deactivated, by the microcontroller 30 through its first output port 55, for the predetermined inhibition time period Toff.

[0292] Advantageously, following the elapsed predetermined inhibition time period Toff, the voltage supplied by the timing circuit 41 reaches a reset voltage value U2 of the current value of the predetermined inhibition time period Toff.

[0293] Thus, the reset voltage value U2 supplied by the timing circuit 41 corresponds to a voltage value allowing the operation of the electric motor 16, in particular the execution of a control order received by the first communication module 27 of the control unit 15.

[0294] Furthermore, in the event that the value of the determined power cut-off time period is greater than or equal to the threshold value of the predetermined inhibition time period Toff, the control unit 15 allows the operation of the electric motor 16, in particular the execution of a control command received by the first communication module 27 of the control unit 15.

[0295] Here and in no way limiting, the reset voltage value U2 supplied by the timing circuit 41 is greater than or equal to 1.5 volts.

[0296] We now describe a method of executing a calibration process for the determination device 39, illustrated in figure 5.

[0297] The calibration procedure includes at least the following steps, preferably performed in the order mentioned:

[0298] - a stage of receiving a command order from the electromechanical actuator 11, in particular by the first communication module 27 of the control unit 15,

[0299] - a first step of activating the read control signal, by the microcontroller 30 through its second output port 56, causing the second switching element 45 to switch to its closed state, in particular by switching the fourth switching element 54 to its closed state,

[0300] - a first step of measuring an initial voltage value supplied by the timing circuit 41, by the measuring device 48,

[0301] - a first step of reading the initial voltage value measured in the previous step, by the microcontroller 30 through its input port 32,

[0302] - a first step of memorizing the initial voltage value measured in the memory of microcontroller 30,

[0303] - a first step of deactivating the read control signal, by the microcontroller 30, causing the second switching element 45 to switch to its open state, in particular by switching the fourth switching element 54 to its open state,

[0304] - a second activation stage of the load control signal, by the microcontroller 30 through its first output port 55, causing the first switching element 40 to switch to its closed state, in particular by switching the third switching element 52 to its closed state,

[0305] - a charging step of the first passive component 42 from the electrical power supply 24, up to a predetermined charging voltage U o ,

[0306] - a discharge stage of the first passive component 42, through the second passive component 44, for a first predetermined period of time,

[0307] - a second step of deactivating the load control signal, by the microcontroller 30, for a second predetermined time period T, causing the first switching element 40 to switch to its open state, in particular by switching the third switching element 52 to its open state,

[0308] - a third activation step of the read control signal, by the microcontroller 30 through its second output port 56, causing the second switching element 45 to switch to its closed state, in particular by switching the fourth switching element 54 to its closed state,

[0309] - a second step of measuring a voltage value after discharge UT provided by the timing circuit 41, by the measuring device 48,

[0310] - a second step of reading the measured voltage value after discharge UT, by the microcontroller 30 through its input port 32,

[0311] - a second step of memorizing the voltage value after discharge UT measured in the memory of the microcontroller 30,

[0312] - a first step in calculating the actual value of an RC constant of the timing circuit 41 according to the following formula:

[0313] - a second step of calculating the reset voltage value U2 of the predetermined inhibition time period Toff according to the following formula:

[0314] - T off

[0315] U2 = U0 - RC , And

[0316] - a third step of memorizing the reset voltage value U2 in the memory of the microcontroller 30. Thus, the reset voltage value U2 corresponds to a discharge time period of the timing circuit 41 as a function of the actual value of the RC constant of the timing circuit 41.

[0317] Here, and in no way limitingly, the predetermined value of the charging voltage U o The voltage of the first passive component 42 is 0.7 volts. The predetermined inhibition time period Toff is twelve minutes.

[0318] ​Thanks to the present invention, the electrical disconnection of the timing circuit from the microcontroller, when the electromechanical actuator is not supplied with electrical energy by the power supply source, makes it possible to avoid an additional discharge of the first passive component caused by the operation of the microcontroller, which is added to the discharge of the first passive component through the second passive component.

[0319] In this way, the discharge of the first passive component is controlled, since it only occurs through the second passive component.

[0320] Therefore, the control unit ensures the reliability and accuracy of determining a power outage time period, during which the electromechanical actuator is not supplied with electrical energy by the electrical power supply source.

[0321] Numerous modifications can be made to the example embodiment and variants described above, without departing from the scope of the invention as defined by the claims.

[0322] 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

39 DEMANDS 1. Electromechanical actuator (11) for a shading device (3), the electromechanical actuator (11) being configured to be connected to at least one electrical power supply (24), the electromechanical actuator (11) comprising at least: - an electric motor (16), and - a control unit (15), the control unit (15) controlling the electric motor (16), the control unit (15) comprising at least: - a microcontroller (30), the microcontroller (30) comprising at least one input port (32), and - a device for determining (39) a period of power interruption during which the electromechanical actuator (11) is not supplied with electrical energy by the electrical power supply source (24), the determining device (39) comprising at least: - a first switching element (40), the first switching element (40) being configured to be switched between an open state and a closed state, and conversely, the first switching element (40) being switched to its open state, when the electromechanical actuator (11) is not supplied with electrical energy by the electrical power supply source (24), and - a timing circuit (41), the first switching element (40) being electrically connected to the timing circuit (41), the timing circuit (41) being supplied with electrical energy, when the first switching element (40) is switched to its closed state by the microcontroller (30), the timing circuit (41) comprising at least: - a first passive component (42), the first passive component (42) being configured so that the microcontroller (30) determines a period of time elapsed between two instants (t1, t2) from a variation of a voltage supplied by the first passive component (42), and - a second passive component (44), the first passive component (42) being discharged by the second passive component (44), when the first switching element (40) is switched to its open state, characterized 40 in that the determining device (39) further comprises at least one second switching element (45), the second switching element (45) being configured to be switched between an open state and a closed state, and conversely, the second switching element (45) being switched into its open state, when the electromechanical actuator (11) is not supplied with electrical energy by the electrical power supply source (24), and in that the second switching element (45) is electrically connected, on the one hand, to the timing circuit (41) and, on the other hand, to the input port (32) of the microcontroller (30).

2. Electromechanical actuator (11) for a blackout device (3) according to claim 1, characterized in that the timing circuit (41) further comprises a first connection point (76), a second connection point (77) and a third connection point (78), in that the control unit (15) further comprises a reference ground (75), in that the first connection point (76) is electrically connected, on the one hand, to the first switching element (40) and, on the other hand, to the second connection point (77), in that the second connection point (77) is electrically connected, on the one hand, to the second switching element (45) and, on the other hand, to the first connection point (76), and in that the third connection point (78) is electrically connected to the first passive component (42), the second passive component (44) and the reference ground (75) of the control unit (15).

3. Electromechanical actuator (11) for a blackout device (3) according to claim 1 or according to claim 2, characterized in that the first passive component (42) is a capacitor, in that the second passive component (44) is a first resistor, and in that the second passive component (44) is mounted in parallel with the first passive component (42).

4. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 3, characterized in that the first and second 41 switching elements (40, 45) are switched respectively into their closed state by the microcontroller (30).

5. Electromechanical actuator (11) for a blackout device (3) according to claim 4, characterized in that the determining device (39) further comprises a third switching element (52) and a fourth switching element (54), in that the first switching element (40) is switched in its closed state by the microcontroller (30) through the third switching element (52), and in that the second switching element (45) is switched in its closed state by the microcontroller (30) through the fourth switching element (54).

6. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 5, characterized in that the determining device (39) further comprises a measuring device (48), the measuring device (48) being disposed between the second switching element (45) and the input port (32) of the microcontroller (30).

7. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 6, characterized in that the determining device (39) further comprises at least one diode (46), in that the diode (46) is electrically connected, on the one hand, to the first switching element (40) and, on the other hand, to the timing circuit (41), and in that the diode (46) is conducting from the first switching element (40) to the timing circuit (41) and blocking from the timing circuit (41) to the first switching element (40).

8. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 7, characterized in that the microcontroller (30) further comprises a first output port (55) and a second output port (56), the first output port (55) being configured to activate and deactivate a load control signal, and the second output port (56) being configured to activate and deactivate a read control signal, in that the activation of the load control signal switches the first switching element (40) from its open state to its closed state and the deactivation of the load control signal switches the first switching element (40) from its closed state to its open state, and in that the activation of the read control signal switches the second switching element (45) from its open state to its closed state and the deactivation of the read control signal switches the second switching element (45) from its closed state to its open state.

9. Electromechanical actuator (11) for a blackout device (3) according to any one of claims 1 to 8, characterized in that when the electromechanical actuator (11) is not supplied with electrical energy from the electrical power supply source (24), the timing circuit (41) is electrically isolated from the other components of the control unit (15), by means of the first switching element (40) and the second switching element (45) switching respectively in their open state.

10. Shading device (3), the shading device (3) comprising at least: - a screen (2), and - an electromechanical actuator (11), the screen (2) being driven in movement by the electromechanical actuator (11), characterized in that the electromechanical actuator (11) conforms to any one of claims 1 to 9.

11. Method for calibrating a device for determining (39) a power outage time period belonging to an electromechanical actuator (11) according to claim 6 and claim 8, the method comprising at least the following steps: a) a step of receiving a command order from the electromechanical actuator (11); b) a first step of activating the read command signal, by the microcontroller (30) through the second output port (56), causing the second switching element (45) to switch to its closed state; c) a first step of measuring an initial voltage value supplied by the timing circuit (41), by the measuring device (48); d) a first step of reading the initial voltage value measured in step c), by the microcontroller (30) through its input port (32); e) a first step of storing the measured initial voltage value in a memory of the microcontroller (30); f) a first step of deactivating the read control signal, by the microcontroller (30), causing the second switching element (45) to switch to its open state; g) a second step of activating the load control signal, by the microcontroller (30) through the first output port (55), causing the first switching element (40) to switch to its closed state;h) a charging step of the first passive component (42) from the electrical power supply source (24), up to a predetermined charging voltage (U; o); i) a step of discharging the first passive component (42), through the second passive component (44), for a first predetermined period of time; j) a second step of deactivating the charge control signal, by the microcontroller (30), for a second predetermined period of time (T), causing the first switching element (40) to switch to its open state; k) a third step of activating the read control signal, by the microcontroller (30) through its second output port (56), causing the second switching element (45) to switch to its closed state; l) a second step of measuring a post-discharge voltage value (U0) provided by the timing circuit (41), by means of the measuring device (48); m) a second step of reading the measured post-discharge voltage value (U0), by the microcontroller (30) through its input port (32);n) a second step of memorizing the measured voltage value after discharge (UO in the microcontroller memory (30); o) a first step of calculating a real value of a constant (RC) of the timing circuit (41) according to the formula:; p) a second step of calculating a reset voltage value (U2) for a predetermined inhibition time period (Toff) according to the formula: - T off U2 = U0 - <e RC ; and q) a third step of storing the reset voltage value (U2) in the microcontroller memory (30).

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