Drive device for a screen winding device

Abstract

The invention relates to a drive device for rotating a winding assembly about a longitudinal axis (X), the drive device including a torque support (34) and a tubular casing (8) in which an electric motor (10) is accommodated, the drive device also comprising a control circuit (14) comprising a module for receiving electromagnetic waves comprising an antenna (17), the torque support having a first longitudinal portion (34.1) mounted in one end of the tubular casing (8) and a second longitudinal portion (34.2) projecting from the tubular casing (8) as an extension thereof, the second longitudinal portion (34.2) having a hollow tubular profile with an external diameter equal to that of the casing (8) and at least partially accommodating the antenna (17) of the module for receiving electromagnetic waves and wherein at least the second longitudinal portion (34.2) includes an area that is permeable to electromagnetic waves.

Description

[0001] Description

[0002] TRAINING DEVICE FOR A SCREEN WINDING DEVICE

[0003] TECHNICAL FIELD AND PREVIOUS ART

[0004] The present invention relates to a drive device for a winding device for a roll-up screen of a blackout installation.

[0005] A shading system includes a motorized drive mechanism that rotates a roller tube onto which a screen is wound and unwound. The screen can be a shutter or a solar protection screen.

[0006] The drive device includes an electromechanical actuator, generally cylindrical in shape, partially inserted into the winding tube. The electromechanical actuator comprises a torque support and a housing containing an electric motor, one or more rechargeable power batteries, and a control circuit for the electromechanical actuator.

[0007] The torque support consists of a first part, called the head, and a body. The head includes an electronic board supporting a human-machine interface (HMI) that allows the user, for example, to program the electromechanical actuator or recharge batteries housed within it. The HMI includes, for example, a connector for a charging cable or a cable connected to an external programming tool for programming the electromechanical actuator, one or more buttons, or an indicator light.

[0008] Traditionally, the head of the electromechanical actuator is partly located outside the body of the electromechanical actuator, in particular partly located outside the winding tube to allow easy access to the human-machine interface by the user.

[0009] The actuator head can be used to house an antenna associated with electromagnetic wave reception devices. This antenna can be wound inside the head or around its periphery, so as to be either fully exposed or only surrounded by a material permeable to electromagnetic waves.

[0010] Figure 1 shows an example of a prior art shading device 4' mounted above an opening O. The screen 2' is partially unrolled. The shading device is fixed at its longitudinal ends 4.1', 4.2' above the opening O to be shading by means of brackets 6.1', 6.2' fixed to the wall. The mounting is achieved, for example, by a mounting accessory connected to the bracket 6.2' at one end and by the torque support of the electromechanical actuator 8' at the other end. The winding tube is mounted freely for rotation on one side on the mounting accessory, which acts as a bearing, and on the other side on a ring mounted freely for rotation on the housing of the electromechanical actuator. A wire-shaped antenna 17' protrudes from the head of the torque support.

[0011] The electromechanical actuator 8' is generally, except for its head section, completely housed within the winding tube, which is itself usually metallic. The dimensions of the head, particularly its thin profile to avoid excessive misalignment between the lateral edge of the screen and the corresponding edge of the opening, do not allow for free positioning of the antenna. In Figure 1, the antenna is indeed external to the head.

[0012] The positioning of the antenna is therefore a critical issue, as it determines the reception range of the receiving means and thus the ability of the electromechanical actuator to receive control orders.

[0013] Therefore, it is desirable to improve the positioning of the antenna.

[0014] STATEMENT OF THE INVENTION

[0015] It is therefore one of the aims of this application to provide a screen drive device, also referred to as an electromechanical actuator, which does not have the disadvantages mentioned above, and which offers more possibilities for positioning an antenna.

[0016] The stated objective is achieved by a drive device for rotating a screen winding assembly. This drive device comprises a torque support and a tubular housing containing an electric motor. The drive device also includes a control circuit comprising an electromagnetic wave receiver module with an antenna. The torque support has a first longitudinal portion mounted in one end of the tubular housing and a second longitudinal portion extending from the tubular housing. This second portion has a diameter substantially equal to the outer diameter of the tubular housing and includes a zone permeable to electromagnetic waves. The antenna is housed within this second longitudinal portion at the level of the electromagnetic wave-permeable zone.In other words, the electromagnetic wave permeable zone of the second longitudinal part is opposite an active portion of the antenna, through which the drive device can transmit and receive control commands.

[0017] Thus the antenna can be housed entirely within the drive device while remaining functional, and in a part intended to be housed within a winding assembly of a drive device.

[0018] The invention eliminates the need for a torque support with a head large enough to house the receiving module. Furthermore, the antenna is positioned at a specific point within the winding mechanism, simplifying the determination of the reception range. Additionally, the concealed antenna improves the overall aesthetics. Moreover, integrating the antenna into the drive unit protects it from damage. Previously, wire antennas protruding from the torque support head could be torn off.

[0019] In an advantageous example, the second longitudinal part is made of material permeable to electromagnetic waves, that is to say, entirely made of material permeable to electromagnetic waves.

[0020] Preferably, the drive device is mounted in a winding assembly of a winding device, the assembly comprising a tube and a ring, the second longitudinal part of the torque support being housed in the ring which also has a zone permeable to electromagnetic waves.

[0021] The invention offers the advantage of requiring little adaptation of the environment of the drive device, and of retaining the existing winding tubes and adapting them to an electromechanical actuator whose second longitudinal part of the torque support houses the antenna in the extension of the tubular housing.

[0022] The present invention relates to a device for rotating a winding assembly around a longitudinal axis, said drive device comprising a torque support and a tubular housing in which an electric motor is housed, the drive device also comprising a control circuit including an electromagnetic wave receiving module comprising an antenna, the torque support having a first longitudinal part mounted in one end of the tubular housing and a second longitudinal part projecting from the tubular housing as an extension thereof, the second longitudinal part having a hollow tubular profile with an outside diameter equal to that of the housing and housing at least partially the antenna of the electromagnetic wave receiving module and at least the second longitudinal part having a zone permeable to electromagnetic waves.

[0023] Preferably, the second longitudinal part is made of a material permeable to electromagnetic waves.

[0024] The drive device advantageously includes means for rotationally locking the torque support relative to the tubular housing.

[0025] In one embodiment, the torque support includes a third longitudinal part extending from the second longitudinal part and whose outside diameter is greater than that of the tubular housing and the second longitudinal part.

[0026] In one embodiment, the antenna is printed on an electronic control circuit board housed at least partially in the second longitudinal part.

[0027] In another example of implementation, the antenna is an electronic component implanted on an electronic board of the control circuit housed at least partially in the second longitudinal part.

[0028] According to another embodiment, the antenna is a cable connected to an electronic control circuit board housed at least partially in the second longitudinal part, the cable being arranged in the second longitudinal part.

[0029] The drive device advantageously includes a human-machine interface housed in the torque support and accessible through the second longitudinal part of the torque support.

[0030] The present invention also relates to a winding device for a roll-up screen of a blackout installation comprising a winding assembly with a longitudinal axis and a drive device for rotating the winding assembly about a longitudinal axis, said drive device being in accordance with any one of the preceding claims, said drive device being at least partially housed in the winding tube, the winding assembly comprising a winding tube and a crown, said crown comprising a first longitudinal part mounted in a longitudinal end of the winding tube and a second longitudinal part projecting from the winding tube as an extension thereof and having an outside diameter equal to that of the winding tube, the second longitudinal part of the crown being opposite the second longitudinal part of the torque support,and the second longitudinal part of the crown contains a zone permeable to electromagnetic waves.

[0031] Preferably, at least the second longitudinal part of the crown is made of a material permeable to electromagnetic waves.

[0032] The crown may include an access area for the human-machine interface.

[0033] The present invention also relates to an occultation installation comprising a winding device according to the invention and a screen fixed to the winding assembly by an upper edge, along an axis parallel to the longitudinal axis of the actuation assembly, but offset on the circumference of the winding assembly substantially by an angle between 90° and 270° with respect to the angular position of the access zone of the crown.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] This application will be better understood with the help of the following description and the attached drawings, which:

[0036] - Figure 1 is a schematic representation of an opening equipped with a state-of-the-art blackout device,

[0037] - Figure 2 is a schematic representation of a front view of an example of a blackout installation according to the invention,

[0038] - Figure 3 is a longitudinal cross-sectional view of part of a drive device according to the invention.

[0039] - Figure 4 is a longitudinal cross-sectional view of part of a winding device comprising the drive device of Figure 3,

[0040] - Figure 5 is a longitudinal cross-sectional view, along a plane orthogonal to the cross-sectional plane of Figure 4, of the entire winding device of Figure 4,

[0041] - Figure 6A is a perspective view of an example of a blackout installation comprising a winding device including a drive device according to another embodiment, with the screen fully unrolled and the human-machine interface accessible,

[0042] - Figure 6B is a view similar to that of Figure 6A, with a charging cable connected to the charging connector of the human-machine interface,

[0043] - Figure 7 is a longitudinal cross-sectional view of part of the winding device of Figure 6A. DETAILED DESCRIPTION OF EMBODIMENTS

[0044] Figure 2 shows a schematic representation of an example of the implementation of a blackout installation according to the invention.

[0045] A shading system SI comprises a winding device DI for a screen and a screen 4. The screen 4 is, for example, a blackout screen, such as a roller shutter, or a solar shading device mounted in front of an opening O (shown in dotted lines). A load bar 5 is mounted along the lower edge of the screen 4.

[0046] The winding device DI extends along a longitudinal axis X and includes a winding assembly 6 with axis X around which the screen 4 is designed to wind and unwind between a fully wound upper position and a fully unwound lower position. The winding assembly is hollow. The screen 4 is fixed by one edge to the winding assembly 6.

[0047] The winding device DI also includes a drive device 7 rotating around the X axis of the winding assembly 6.

[0048] The drive device 7 is configured to be housed at least partially within the winding assembly 6 (Figure 4). Figure 5 shows a cross-sectional view of the entire winding device along a plane orthogonal to the cross-sectional plane of Figures 3 and 4.

[0049] Figure 3 shows part of the drive device 7. This includes a tubular housing 8 and, housed in the housing 8, an electromechanical actuator 7.1 comprising an electric motor 10, a reducer (not visible).

[0050] The electromechanical actuator further includes a control circuit 14 for the electromechanical actuator 7.1. The electronic control circuit 14 is mounted on an electronic board 15, such as a printed circuit board. In the example shown, the actuator is powered by one or more power supplies 12 housed in the tubular casing 8. Alternatively, the actuator is powered by an external power source, for example, it is connected by a cable to the mains power supply.

[0051] The reducer 6 extends into an output shaft 7.2 extending along the X axis and engaging with the winding assembly 6, notably through a coupling accessory (not shown), also called a drive wheel.

[0052] The drive device, in particular the electromechanical actuator 7.1, includes a torque support 34 intended to be fixed to a mounting bracket on the wall or ceiling or to a window frame to take up the torque of the electric motor 10. The torque support 34 closes one end of the housing of the electromechanical actuator 7.1.

[0053] The control circuit 14 includes a command receiving module equipped with an antenna 17, specifically for receiving radio commands emitted by a command transmitter, for example, a remote control. Alternatively, or in addition, the command transmitter is a centralized control unit that controls, for example, all the blinds and shades in a dwelling according to predetermined scenarios. In one embodiment, the antenna is printed on the electronic board 15. In another embodiment, the antenna is an electronic component mounted on the electronic board 15 of the control circuit. In yet another embodiment, the antenna is a cable connected to the electronic board 15 of the control circuit.

[0054] According to the invention, the torque support 34 comprises a first longitudinal part 34.1 housed in an end 8.1 of the housing 8 and a second longitudinal part 34.2 extending from the housing and has an outside diameter substantially equal to that of the housing, thus forming a longitudinal extension of the housing.

[0055] At least the antenna of the receiving module is housed in the second longitudinal section. This second longitudinal section 34.2 is permeable to electromagnetic waves, thus enabling the antenna to receive commands emitted by a transmitter. Preferably, at least the second longitudinal section is made of a material permeable to electromagnetic waves, for example, a plastic material such as unfilled polyamide 6-6 (PA66). The second longitudinal section 34.2 is therefore opposite at least one active portion of the antenna. The active portion of the antenna can receive electromagnetic waves, for example, control commands, through a wall made of a material permeable to electromagnetic waves in the second longitudinal section 34.2.

[0056] In the case where the antenna is printed on the electronic board 15 or is a component implanted in the electronic board 15, at least the part of the electronic board containing the antenna is disposed in the second longitudinal part 34.2. In the case where the antenna is a cable connected to the electronic board 15 of the control circuit, the electronic board is housed at least partially in the second longitudinal part 34.2 of the torque support, and the cable is disposed in the second longitudinal part 34.2.

[0057] Furthermore, according to certain embodiments, the torque support 34 comprises a third part 34.3, forming a head, with a larger diameter than the second part 34.2, and intended for connection to a support fixed to the wall or ceiling. The head may have a thinner profile compared to the heads of prior art actuators, since it has only a mechanical function and does not contain any electronic components such as a receiver module.

[0058] The torque support 34 thus has a sufficiently long axial length and a hollow profile to accommodate at least part of the control circuit 14, including part of the electronic board and the antenna of the receiving module. The torque support 34 is at least partially permeable to electromagnetic waves, allowing the antenna to receive the transmitted commands.

[0059] The winding assembly 6 comprises a winding tube 25 with axis X and a ring 28 mounted at one longitudinal end of the winding tube and extending it.

[0060] In this example, as can be seen in Figure 4, the ring 28 comprises a first longitudinal section 28.1 mounted inside the winding tube 25 and a second longitudinal section 28.2 outside the winding tube 25. The first longitudinal section 28.1 has an outer diameter substantially equal to the inner diameter of the winding tube 25. The second longitudinal section 28.2 has an outer diameter substantially equal to the outer diameter of the winding tube, thus forming a tubular element with a substantially constant outer diameter along its entire length. The screen 2 can therefore be wound onto the second longitudinal section 28.2 of the ring 28. The first longitudinal section 28.1 and the second longitudinal section 28.2 have an inner diameter substantially equal to the outer diameter of the housing 8. The ring 28 forms a rotating bearing for the winding assembly relative to the drive device.

[0061] The second longitudinal part 34.2 of the torque support 34 is housed in the ring 28. The ring 28 is preferably entirely made of material permeable to electromagnetic waves, allowing the passage of electromagnetic waves between the transmitter and the antenna.

[0062] Alternatively, only the second longitudinal section 28.2 of the ring surrounding the second longitudinal section 34.2 of the torque support is made of a material permeable to electromagnetic waves. The ring and the torque support are, for example, made of the same material.

[0063] The first longitudinal part 28.1 and the second longitudinal part 28.2 preferably have a sleeve shape connecting by a shoulder 30 against which an end face of the winding tube can rest.

[0064] Preferably, the winding device includes means for rotationally securing the coil 28 to the winding tube 25. For example, the outer diameter of the first longitudinal portion 28.1 is such that it ensures a friction-retained mounting of the coil 28 within the winding tube and rotationally immobilizes the coil 28 relative to the winding tube. Alternatively, rotational immobilization of the coil 28 relative to the winding tube 25 is achieved through a combination of shapes. For example, the inner cross-section of the winding tube 25 may be hexagonal, or have a rib or groove, and the first longitudinal portion 28.1 of the coil 28 may have a complementary outer profile.

[0065] The translational immobilization of the crown 28 relative to the winding tube 25 is achieved by friction, clipping, or any other suitable means (screw, rivet, etc.). There are few axial forces applied to the winding assembly 6. In particular, the winding device 6 advantageously includes means for axially securing the crown 28 to the drive device 25. Furthermore, the winding tube 25 is axially and rotationally fixed to the output shaft of the electromechanical actuator 7.1. Consequently, the crown 28 and the winding tube 25 are both axially fixed to the electromechanical actuator 7.1 and thus axially fixed relative to each other.

[0066] The translational immobilization between the winding assembly and the drive device can be achieved in various ways. For example, elastic means carried by the crown clip onto the torque support. Such means will be described in more detail below. Alternatively, the third part 34.3 forms an axial stop for the winding assembly.

[0067] Internal zones 28.3, visible in figure 4, forming a bearing between the ring 28 and the drive device can be made along the length of the ring 28, for example by making the internal diameter of the ring 28, along the length of the second longitudinal part 28.2 or only on several point portions of the second longitudinal part 28.2.

[0068] Antenna 17 is kept inside the winding assembly, improving the aesthetic appearance of the installation and limiting the risk of damage to antenna 17.

[0069] The screen is attached to the winding tube 25 and optionally to the ring 28 by any suitable means. In the simplest way, one upper edge of the screen is attached to the winding tube by gluing, for example, using double-sided adhesive. Alternatively, a groove provided in the winding tube 25 accommodates a corresponding bead provided at the end of the screen.

[0070] In a preferred embodiment, the winding tube 25 is made of metal, for example, bent and welded sheet metal, enabling it to bear most of the loads, such as the weight of the fabric and the forces transmitted by the electric motor 10, and the ring 28 is made of plastic, for example, unfilled polyamide 6-6 or other plastics with similar properties. Making the ring 28 from plastic allows, on the one hand, for a lighter winding assembly and therefore a lighter winding device, and, on the other hand, for easier manufacturing, particularly the two longitudinal sections.

[0071] 28.1 and 28.1 and the internal zones 28.3 forming a tier.

[0072] Figures 6A, 6B and 7 show further examples of embodiments in which the drive device includes a human-machine interface 16 allowing a user to interact with the drive device, this interface being accessible through the torque support and the ring gear.

[0073] The human-machine interface 16 is connected to the electronic board 15. In Figures 6A, 6B, and 7, the human-machine interface 16 is integrated into the electronic board 15. Alternatively, several electronic boards are used, one containing the control circuit and another the human-machine interface. The human-machine interface 16 is accessible through at least one window in a side wall of the electromechanical actuator 7.1, specifically a side wall of the torque support in the examples shown in Figures 6A, 6B, and 7.

[0074] The human-machine interface 16 includes, but is not limited to, at least one charging connector 20 and / or at least one button, and / or a digital display and / or at least one indicator light such as a light-emitting diode. The button(s) may, for example, have a programming function.

[0075] In the examples shown, the human-machine interface 16 includes a charging connector 20, a button 22, and an indicator light 23. It includes a window

[0076] 18.1 to access connector 20, a window 18.2 to access button 22 and a window 18.3 to allow viewing of indicator light 23.

[0077] In this example, window 18.1 is oblong and extends perpendicularly to the axis of the device, and windows 18.2 and 18.3 are circular. It should be understood that these shapes are not exhaustive. Furthermore, it should also be understood that one or two windows may be provided to access all elements of the human-machine interface. In addition, transparent or opaque covers may be provided to close the windows, for example, temporarily.

[0078] In a preferred embodiment in which the power supply batteries are rechargeable, the charging connector 20 has at least one function for connecting a cable C of a device for charging the power supply battery(ies). Optionally, the connector 20 can be connected by a cable to a programming tool.

[0079] The charging device can be the electrical grid; in this case, cable C has a connector at one end that plugs into the connector of the human-machine interface 16 and a plug at the other end that plugs into a wall socket. Alternatively, the charging device is a fast-charging device such as a power bank.

[0080] In one embodiment, connector 20 has the additional function of connecting a programming device, for example a laptop or tablet.

[0081] The connector is a standard connector, advantageously a universal serial bus or USB (Universal Serial Bus in Anglo-Saxon terminology) connector, most advantageously a USB-C® type, version 3.0 or higher. Alternatively, the connector is of the inductive type.

[0082] Particularly advantageous, magnetic fastening means between the human-machine interface connector and the charging device cable connector allow for easy connection, especially due to the high position of the shading installation.

[0083] The winding assembly includes a side wall 24 with an access area 26 for the human-machine interface 16. More specifically, the second longitudinal part 28.2 includes the access area for the human-machine interface through the second longitudinal part 34.2 of the torque support.

[0084] In this example, the torque support and the card 8 are assembled by rivets 19.

[0085] Figures 6A and 6B show, in particular, an example of an access zone 26 formed in the side wall of the second part 28.2 of the ring 28. In this example, the access zone 26 has three openings 40.1, 40.2, and 40.3 to allow a user or installer to access the human-machine interface of the electromechanical actuator 7.1, especially when the openings 40.1, 40.2, and 40.3 are aligned with the windows 18.1, 18.2, and 18.3, respectively, and the fabric is unrolled. In one embodiment, one or more removable covers (not shown) may be provided to cover the window(s) and / or the opening(s) when not in use.

[0086] Furthermore, the access area 26 may include a transparent element for viewing the screen and / or indicator lights, the transparent material advantageously forming a light guide over at least part of its surface. Alternatively, the shutter element is partly flexible to allow the buttons to be operated through it. As a further alternative, the shutter element is both flexible and transparent.

[0087] In one example, the crown is made entirely of transparent material.

[0088] The crown 28 comprises a main rigid portion. If the access area includes a flexible portion, the crown can be made of two materials, for example, by co-injection. Alternatively, the flexible portion is bonded to the rigid portion.

[0089] The winding tube is significantly longer than the crown and transmits most of the mechanical forces, particularly those applied by the electric motor and the screen. The motor is connected to the winding tube via the gearbox, output shaft, and drive wheel. Therefore, the winding assembly, with the crown extending from the tube, has little to no impact on the mechanical strength of the winding mechanism.

[0090] The winding assembly and therefore the access area are mobile in rotation relative to the drive device and therefore to the human-machine interface.

[0091] Furthermore, access to the human-machine interface is possible when the screen is fully or almost fully unrolled and reveals the access area 26 of the winding assembly.

[0092] The winding device is configured to ensure the alignment of the access zone 26 and the human-machine interface 16 in a position in which the access zone 26 is accessible.

[0093] In one example, an installer adjusts the angular position of the electromechanical actuator 7.1 and the winding assembly 6 so that, in the fully or almost fully unwound position, the access area and the human-machine interface are aligned, i.e., positioned angularly opposite each other. This preferred position can be stored in the control circuit 14 as a reference position.

Claims

Demands 1. A drive device for rotating a winding assembly about a longitudinal axis (X), said drive device comprising a torque support (34) and a tubular housing (8) in which an electric motor (10) is housed, the drive device also comprising a control circuit (14) comprising an electromagnetic wave receiving module including an antenna (17), the torque support having a first longitudinal portion (34.1) mounted in one end of the tubular housing (8) and a second longitudinal portion (34.2) projecting from the tubular housing (8) as an extension thereof, the second longitudinal portion (34.2) having a hollow tubular profile with an outside diameter equal to that of the housing (8) and housing at least partially the antenna (17) of the electromagnetic wave receiving module and in which at least the second longitudinal portion (34.2) has a zone permeable to electromagnetic waves.

2. A drive device according to claim 1, wherein the second longitudinal part (34.2) is made of a material permeable to electromagnetic waves.

3. Drive device according to claim 1 or 2, comprising means for rotationally locking the torque support (34) relative to the tubular housing (28).

4. A drive device according to any one of claims 1 to 3, wherein the torque support comprises a third longitudinal part (34.3) extending from the second longitudinal part (34.2) and whose outside diameter is greater than that of the tubular housing (8) and the second longitudinal part (34.2).

5. A drive device according to any one of the preceding claims, wherein the antenna is printed on an electronic control circuit board housed at least partially in the second longitudinal part (34.2).

6. A drive device according to any one of claims 1 to 4, wherein the antenna is an electronic component implanted on an electronic control circuit board housed at least partially in the second longitudinal part (34.2).

7. A drive device according to any one of claims 1 to 4, wherein the antenna is a cable connected to an electronic control circuit board housed at least partially in the second longitudinal part (34.2), the cable being disposed in the second longitudinal part (34.2).

8. A drive device according to any one of the preceding claims, comprising a human-machine interface housed in the torque support and accessible through the second longitudinal part of the torque support.

9. Winding device for a roll-up screen of a blackout installation comprising a winding assembly with longitudinal axis (X) and a drive device for rotating the winding assembly about a longitudinal axis (X), said drive device being in accordance with any one of the preceding claims, said drive device being at least partially housed in the winding tube, the winding assembly (6) comprising a winding tube (25) and a ring (28), said ring (28) comprising a first longitudinal part (28.1) mounted in a longitudinal end of the winding tube (25) and a second longitudinal part (28.2) projecting from the winding tube as an extension thereof and having an outside diameter equal to that of the winding tube (25), the second longitudinal part (28.2) of the ring (28) being opposite the second longitudinal part (34).2) of the torque support (34), and in which the second longitudinal part (28.2) of the ring has a zone permeable to electromagnetic waves.

10. Winding device according to the preceding claim, wherein at least the second longitudinal part of the crown is made of a material permeable to electromagnetic waves.

11. Winding device according to claim 9 or 10 in combination with claim 8, wherein the ring comprises an access zone for the human-machine interface.

12. Blackout installation comprising a winding device according to claim 11 and a screen fixed to the winding assembly by an upper edge, along an axis parallel to the longitudinal axis of the actuation assembly, but offset on the circumference of the winding assembly by substantially an angle between 90° and 270° with respect to the angular position of the access zone (26) of the ring (28).

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