shading device

Abstract

To provide a shading device with variable shading effect. [Solution] The present invention relates to a shading device comprising a shading curtain (24) and a pulling device (22). The shading curtain comprises a first shading layer and a second shading layer, each having at least two types of light-transmitting regions with different light transmittances. The pulling device comprises a first pulling member and a second pulling member, wherein the first pulling member is connected to the first pulling layer and configured to pull the first pulling layer, and the second pulling member is connected to the second pulling layer and configured to pull the second pulling layer. The first and second pulling members are movable relative to each other between a first relative position and a second relative position, and the first and second shading layers move parallel to each other. In the first relative position, the shading curtain has a first light transmittance, and in the second relative position, the shading curtain has a second light transmittance. This shading device reliably achieves a variable shading effect.

Description

[Technical Field]

[0001] The present invention relates to a light blocking device that blocks light. The light blocking device may be applied to a vehicle, for example, a side window, a windshield, a back window, or a sunroof of a passenger car. [Background technology]

[0002] Some known vehicles are provided with a shading device. The shading device is used to block light, such as sunlight, on sunny summer days, which may be energy-efficient and improve passenger comfort. The shading device may comprise a blackout curtain. Conventional vehicle blackout curtains comprise a single layer with substantially constant transparency. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE INVENTION It is an object of the present invention to provide a shading device that can reliably achieve a variable shading effect. [Means for solving the problem]

[0004] To solve this problem, a shading device has been proposed, which comprises: a light-blocking curtain having a first light-blocking layer and a second light-blocking layer each having at least two types of light-transmitting regions with different light transmittances; a pulling device having a first pulling member and a second pulling member, the first pulling member being connected to the first light-blocking layer and configured to pull the first light-blocking layer, and the second pulling member being connected to the second light-blocking layer and configured to pull the second light-blocking layer; Equipped with The first and second pulling members are movable relative to each other between a first relative position and a second relative position, the first and second light-shielding layers move parallel to each other, and the light-shielding curtain has a first light-transmitting property at the first relative position and a second light-transmitting property at the second relative position.

[0005] In the shading device of the present invention, the light transmittance of the shading curtain may be adjusted as needed. For example, the shading curtain may be switched to its maximum light transmittance state to allow external light into the vehicle or to allow viewing of the exterior from inside the vehicle. For example, the shading curtain may also be switched to a minimum light transmittance state, such as an opaque state, to block out hot sunlight or to ensure greater privacy.

[0006] In some embodiments, the blackout curtains may be switched between an inactivated, retracted state and an activated, deployed state, while in other embodiments, the blackout curtains may be permanently held in the activated, deployed state.

[0007] In some embodiments, the pulling device can be configured to pull the blackout curtain from an inactivated, retracted state to an activated, deployed state.

[0008] In some embodiments, the direction of deployment of the blackout curtains may be the same as the direction of movement of the first and second pull members relative to each other, which is particularly user-friendly in deploying the blackout curtains and switching the light-transmitting state of the blackout curtains.

[0009] In some embodiments, the shading device may comprise a drive configured to drive the pulling device, for example the drive may be an electric motor or a hydraulic drive.

[0010] In some embodiments, the driver may be configured to drive the puller such that the puller collectively moves to at least one of deploy and retract the blackout curtain. Alternatively or additionally, the driver may be configured to drive the puller such that the first and second pull members move linearly relative to one another.

[0011] In some embodiments, the drive device may be configured to allow the first and second pull members to be switched to any relative position between the first and second relative positions. In other embodiments, the drive device may be configured to allow the first and second pull members to be switched to either the first or second relative position.

[0012] In an embodiment, the driver may be configured to drive one of the pulling members of the pulling device.

[0013] In one embodiment, the drive device may be configured to drive the same one pull member of the pull device, such as the first or second pull member, during the unfolding movement of the blackout curtain and during the relative movement of the first pull member 221 and the second pull member relative to each other following the unfolding movement.

[0014] In an embodiment, the drive device can drive the pulling device, for example a first pulling member of the pulling device, by means of the support rod.

[0015] In some embodiments, the support bar can move in a plane.

[0016] In some embodiments, the shading device may include a guide rail configured to receive and guide the support rod.

[0017] In one embodiment, the drive device can drive the support bar by a Bowden cable.

[0018] In some embodiments, the guide rail may be further configured to receive and guide the long sides of the blackout curtain.

[0019] In one embodiment, the first and second pulling members 221 and 222 are holdable in one of the first and second relative positions under the action of a holding force and are switchable to the other first and second relative positions in response to the holding force.

[0020] For example, the holding force can be achieved by a releasable snap connection, magnetic forces of mutually attractive or mutually repelling magnets, static friction forces or elastic deformation forces.

[0021] In some embodiments, the first and second pull members can be held in one relative position by the retaining force of a resilient element.

[0022] In one embodiment, the resilient element may be a spring element that biases one pulling member to a first relative position with respect to the other pulling member, and the one pulling member is capable of translationally moving to a second relative position with respect to the other pulling member against the spring force of the spring element through a predetermined displacement.

[0023] In some embodiments, the spring element can be at least one of a tension spring, a pressure spring, and a torsion spring.

[0024] In some embodiments, the first and second relative positions of the first and second pulling members may be determined by a pair of stops on the pulling device, respectively.

[0025] In some embodiments, the first and second pull members may include stops at their ends for the second relative position.

[0026] In one embodiment, the spring element may have an end that applies a force to a first stop of the first pull member against a first opposing position that is stationary relative to the other pull member, and may be fixed with its other end to the other pull member.

[0027] In some embodiments, the pulling device may include a spring seat disposed between the first pulling member 221 and the second pulling member, wherein the spring element is received in the spring seat.

[0028] In an embodiment, the spring seat may have a first counter stop.

[0029] In some embodiments, the pulling device may include a linear guide that defines a direction of relative movement of the first and second pulling members.

[0030] In an embodiment, the linear guide may include a guide groove on one of the first and second pull members and a protrusion on the other of the first and second pull members, where the protrusion may be guided within the guide groove.

[0031] In one embodiment, when viewed in the height direction of the pulling device, which is perpendicular to the relative movement direction of the first pulling member and the second pulling member, the linear guide portion may include a pair of guide grooves and a pair of protrusions.

[0032] In one embodiment, the spring element may be centrally located between the pair of guide grooves and the pair of protrusions when viewed in the height direction of the pulling device.

[0033] In some embodiments, the protrusions may be hook-shaped.

[0034] In one embodiment, the hook-shaped protrusion may be held in engagement with the guide groove by a retaining plate that may be positioned between the first and second pull members and may be connected to one of the pull members.

[0035] In some embodiments, one of the first and second pull members may have a curved edge that surrounds the other of the first and second pull members around its entire circumference or, alternatively, around its circumference excluding the backside.

[0036] In some embodiments, the first translucency and the second translucency can correspond to the same or different amounts of translucency of the blackout curtain.

[0037] In some embodiments, the first translucency may correspond to one of the maximum and minimum translucency of the blackout curtain, preferably the maximum translucency, and the second translucency may correspond to the other of the maximum and minimum translucency of the blackout curtain, preferably the minimum translucency, in particular an opaque state.

[0038] In one embodiment, each light-shielding layer may have at least one of first and second light-transmitting regions distributed therein. For example, the first and second light-transmitting regions may be alternately and periodically arranged, and preferably, the extending direction of the first and second light-transmitting regions is perpendicular to the unfolding direction of the light-shielding curtain.

[0039] In one embodiment, at least one of the area size of each of the first light-transmitting areas is equal to or smaller than the area size of each of the second light-transmitting areas, and the light transmittance of the first light-transmitting areas is greater than that of the second light-transmitting areas.

[0040] In one embodiment, At the first relative position, the first light-transmitting regions of the first and second light-shielding layers overlap, and the second light-transmitting regions of the first and second light-shielding layers overlap; At the second relative position, the first light-transmitting region of the first light-shielding layer overlaps with the second light-transmitting region of the second light-shielding layer, and the second light-transmitting region of the first light-shielding layer overlaps with the first light-transmitting region of the second light-shielding layer. At least one of the following is true.

[0041] In some embodiments, the first and second light-shielding layers may each be made of a flexible material.

[0042] In some embodiments, the first and second light-shielding layers may be flush with each other.

[0043] In some embodiments, the shading device may be configured for a vehicle such as an automobile, particularly a passenger car. The shading device may be configured for a side window, a windshield, a back window, or a sunroof of the automobile.

[0044] In some embodiments, the blackout curtain may be configured to be deployed from one side of the front and rear of the side window to the other.

[0045] In some embodiments, the blackout curtains may be adapted to be rolled up.

[0046] In some embodiments, the shading device may comprise a return spring that acts on the shading curtain in a rolling direction.

[0047] In an embodiment, the first and second light-shielding layers may each include a reel and a return spring acting on the reel in the winding direction.

[0048] In some embodiments, the shading device may comprise a housing within which the shading curtain is wound and which may house a reel and return spring for the shading curtain.

[0049] In some embodiments, the housing may include a first guiding edge for the first light blocking layer and a second guiding edge for the second light blocking layer.

[0050] In some embodiments, the shading device may include a first guide rail having a groove configured to receive and guide a first long side of the blackout curtain, such that when the blackout curtain is in a partially or finally deployed state, the deployed area of ​​the first long side of the blackout curtain is at least partially received within the groove.

[0051] In some embodiments, the first longitudinal side may have a support member, which allows the first longitudinal side to be received and guided within the groove.

[0052] In the shading device, the first longitudinal side of the shading curtain is received and guided by the groove of the first guide rail, which may provide a relatively stable shading effect, or may at least reduce annoying noise caused by collisions between components of the shading device, or may at least reduce light leakage that may occur in the first longitudinal direction.

[0053] In some embodiments, the groove may be U-shaped.

[0054] In some embodiments, the first light-shielding layer may have a first support member.

[0055] In some embodiments, the second light-shielding layer may have a second support member.

[0056] In some embodiments, the axis of the blackout curtain may be a substantially vertical line, so that the blackout curtain can be pulled laterally or unfolded and rolled up in a direction generally perpendicular to the vertical line.

[0057] In some embodiments, the axis of the blackout curtain may be at an angle of no more than 30 degrees to the vertical, such as about 5 degrees, about 10 degrees, or about 15 degrees.

[0058] In some embodiments, the first longitudinal side may be the upper longitudinal side and the second longitudinal side may be the lower longitudinal side.

[0059] In comparison, in known shading devices, the axis of the shading curtain is horizontal, allowing the shading curtain to be pulled up or down.

[0060] In some embodiments, the support member is configured to slide along the groove.

[0061] In one embodiment, the width of the groove of the blackout curtain together with the support member and the width of the first long side may match each other, so that the first long side of the blackout curtain together with the support member forms a gap (clearance) that fits into the groove.

[0062] In the above study, the inventors of the present invention found that the upper longitudinal side of a blackout curtain that can be pulled laterally is more susceptible to external interference, such as vehicle vibration, than a blackout curtain that can be pulled vertically. Furthermore, the inventors found that reinforcing the upper longitudinal side of the blackout curtain may be detrimental to the shape stability of the blackout curtain during the unfolding process and in the final unfolded position due to increased gravity. Surprisingly, the shape stability of the blackout curtain during the unfolding process and in the final unfolded position can be improved by properly receiving and guiding the support member in the first guide rail. By adapting to the aforementioned clearance, the shape stability of the blackout curtain can be further enhanced. For example, the blackout curtain can maintain good flatness and stable light-blocking performance during the unfolding process and in the final unfolded position.

[0063] In some embodiments, a support member may be disposed on a side of the first long side of each light-shielding layer.

[0064] In some embodiments, the support members may form edges on a first long side of each light-blocking layer.

[0065] In some embodiments, the support member and the first guide rail may generate at least one of a magnetic attractive force and a magnetic repulsive force.

[0066] When the blackout curtain can be pulled sideways, it can be further ensured that the blackout curtain always maintains good flatness and stable blackout performance during the deployment process and in the final deployed position, especially in combination with magnetic force and adaptation to the aforementioned clearance.

[0067] In some embodiments, the support member is configurable to generate at least one of a magnetic attractive force and a magnetic repulsive force on at least one of the sidewall and the bottom of the first guide rail.

[0068] In one embodiment, the support member comprises a magnet or is at least partially made of a magnetic material, and the first guide rail comprises a magnet or is at least partially made of a magnetic material.

[0069] In an embodiment, the first support member may be configured to generate a magnetic attractive force with the first groove wall of the first guide rail.

[0070] In an embodiment, the second support member may be configured to generate a magnetic attractive force with a second groove wall of the first guide rail that faces the first groove wall.

[0071] In some embodiments, the first support member may be configured to generate a magnetic attractive force with the bottom of the first guide rail.

[0072] In some embodiments, the second support member may be configured to generate a magnetic attractive force with the bottom of the first guide rail.

[0073] In one embodiment, the first and second support members may be configured to maintain a spacing between the deployed areas of the first and second shading layers during at least one of movement of the shading curtain and when the shading curtain is stationary.

[0074] In some embodiments, the shading device may include a second guide rail with a groove.

[0075] In some embodiments, the groove in the second rail may be configured to receive and guide the second long side of the blackout curtain.

[0076] In some embodiments, the second longitudinal side may have a support member that allows the second longitudinal side to be received and guided in a groove in the second guide rail.

[0077] In some embodiments, the support members of the second longitudinal side and the second guide rail are capable of generating at least one of a magnetic attractive force and a magnetic repulsive force.

[0078] In one embodiment, the support member on the second longitudinal side may be configured to cooperate, particularly with the support member on the first longitudinal side, to maintain the spacing between the deployed areas of the first and second shading layers during at least one of movement of the shading curtain and when the shading curtain is in a stationary state.

[0079] In some embodiments, the support member may be a continuous member extending along the first long side of the blackout curtain, or may be a plurality of members distributed along the first long side of the blackout curtain.

[0080] In some embodiments, the support members may be an integral part of each longitudinal side, or may be attached to each longitudinal side as separate attachment members.

[0081] In one embodiment, one of the first and second light-shielding layers of the light-shielding curtain may have a support member on the first longitudinal side, while the other light-shielding layer may not have a support member on the first longitudinal side, and at least one of the first and second light-shielding layers may be received and guided in the groove of the second guide rail by the support member.

[0082] In some embodiments, the second guide rail and second long side may include the same or similar magnet arrangement as the first guide rail and first long side.

[0083] The individual technical features described above, the individual technical features described below, and the individual technical features obtained from the drawings may be combined with each other arbitrarily as long as the combined technical features are not contradictory.

[0084] Next, an embodiment of the present invention will be described with reference to the accompanying drawings. [Brief explanation of the drawings]

[0085] [Figure 1A] FIG. 1A is a perspective view of a vehicle door equipped with a light blocking device according to one embodiment of the present invention. [Figure 1B]FIG. 1B is a perspective view of a vehicle door equipped with a light blocking device according to one embodiment of the present invention. [Figure 1C] FIG. 1C is a perspective view of a vehicle door equipped with a light blocking device according to one embodiment of the present invention. [Figure 2A] FIG. 2(a) is a side view of the puller of the shading device of FIGS. 1A to 1C. [Figure 2B] FIG. 2B is a cross-sectional view of the pulling device along section line AA of FIG. 2A in one state. [Figure 2C] FIG. 2C is a cross-sectional view of the pulling device taken along section line AA of FIG. 2A in an alternative state. [Figure 2D] FIG. 2D is a longitudinal cross-sectional view of the pulling device taken along section line BB of FIG. 2A. [Figure 2E] FIG. 2E is a partial enlarged view of FIG. 2D. [Figure 3A] FIG. 3A is a cross-sectional view of a two-guide rail structure for a shading device. [Figure 3B] FIG. 3B is a cross-sectional view of a two-rail guide structure for a shading device. [Figure 4A] 4A is a schematic diagram of different states of the shading curtain of the shading device of FIG. 1A. [Figure 4B] 4B is a schematic diagram of different states of the shading curtain of the shading device of FIG. 1B. [Figure 4C] 4C is a schematic diagram of different states of the shading curtain of the shading device of FIG. 1C. [Figure 5] FIG. 5 is a schematic diagram of another embodiment of an individual light-blocking layer for a light-blocking curtain. [Figure 6] FIG. 6 is a schematic diagram of another embodiment of an individual light-blocking layer for a light-blocking curtain. [Figure 7] FIG. 7 is a schematic cross-sectional view of the housing of the shading device of FIGS. 1A to 1C. DETAILED DESCRIPTION OF THE INVENTION

[0086] In order to make the objects, features, and advantages of the present invention more easily understandable, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details are set forth to provide a thorough understanding of the present invention. However, the present invention may be embodied in other ways different from those described herein, and those skilled in the art may make modifications without departing from the meaning of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0087] It should be noted that the singular in the text also includes the plural unless expressly excluded. Furthermore, as used herein, components, steps, operations and elements "comprise" or "include" means that at least one other component, step, operation and element may be present or added. The terms "first" and "second" in the text are used for convenience to describe and distinguish different components with the same name, and do not indicate an order or a primary and secondary relationship between these components.

[0088] 1A to 1C are perspective views of a vehicle door 1 equipped with a shading device 20 according to one embodiment of the present invention, as viewed from the inside of the vehicle. Here, Fig. 1A shows an inactive retracted state (e.g., a predetermined final retracted state) of the shading device 20, Fig. 1B shows an intermediate state of the shading device 20 during the deployment process, and Fig. 1C shows an active deployed state (predetermined final deployed state) of the shading device 20, and the shading device 20 can at least partially block light from outside the vehicle window into the interior of the vehicle.

[0089] The vehicle door 1 has a side window 2 having a window frame 3 and a window glass 4 attached to the window frame. The side window 2 is provided with a shading device 20 that may be arranged in the interior of the vehicle, in other words, on the inside of the side window 2. The shading device 20 includes a shading curtain 24. The shading device 20 may include a housing 21 that may be attached, for example, to the rear end region of the side window 2. Here, the shading curtain 24 may be rolled up and housed in the housing 21, and then pulled out of the housing 21 by a pulling device 22 until it reaches the front end region of the side window 2 opposite the rear end region, i.e., it is activated to reach the deployed state.

[0090] The shading device 20 may further include a drive device 23. The drive device 23 may be arranged, for example, on a sheet metal portion of a vehicle door and may be covered by a door trim panel. The drive device 23 may be, for example, an electric motor. The drive device 23 may be configured to drive the pulling device 22 so as to move the pulling device 22 as a whole and at least one of deploying and retracting the shading curtain 24. The transmission between the drive device 23 and the pulling device 22 may be designed appropriately as needed. For example, the drive device 23 may drive a Bowden cable capable of driving an operating rod 5 capable of operating the pulling device 22. For example, the drive device 23 may drive an endless wire rope transmission capable of driving an operating element such as the operating rod 5 capable of operating the pulling device 22.

[0091] The shading device may comprise a guide rail 26 in which an operating element, such as an operating rod 5 and / or a Bowden cable, may be guided. For this purpose, the guide rail 26 may have a groove, for example. The drive device 23 drives the operating element, such as the operating rod 5, to move in the groove of the guide rail. Advantageously, the operating rod 5 can move in a plane. It is particularly advantageous if the operating rod 5 can be tilted at a predetermined angle from its inoperative, retracted position, i.e., a substantially vertical position, at a predetermined extension displacement of the shading curtain 24, and if, after tilting, the angular position of the operating rod 5 remains unchanged during the subsequent extension displacement of the shading curtain 24. Additionally, the long sides of the shading curtain 24 (the lower long sides of the shading curtain in Figures 1A to 1C) can be received and guided in the groove of the guide rail 26.

[0092] The shading device may include a guide rail 25 arranged against the other long side of the shading curtain 24 (the upper long side of the shading curtain in Figures 1A to 1C). The arrangement of the upper guide rail of the shading device is explained in more detail below with reference to Figures 3A and 3B.

[0093] 1A to 1C are illustrative examples of how the shading device 20 can be used. In an alternative embodiment, the deployed length of the shading curtain 24 can correspond to a portion of the length of the side window 2, for example half of that length. In an alternative embodiment, the housing of the shading device can be located in the lower region of the side window 2, and the shading curtain can be deployed upward toward the upper region of the side window 2. In an alternative embodiment, the shading device 20 can be maintained in its final deployed state.

[0094] The light-blocking curtain 24 may include a first light-blocking layer 241 and a second light-blocking layer 242, each of which may include at least two types of light-transmitting regions having different light transmittances. The light-blocking curtain 24 will be described in more detail below with reference to Figures 4A to 4C, 5 and 6.

[0095] The pulling device 22 according to one embodiment will be described in detail with reference to Figures 2A to 2E. Figure 2A is a side view of the pulling device as seen from inside the vehicle. Figures 2B and 2C are cross-sectional views of the pulling device in different states taken along the cross-sectional line AA in Figure 2A. Figure 2D is a longitudinal cross-sectional view of the pulling device taken along the cross-sectional line BB in Figure 2A. Figure 2E is a partially enlarged view of Figure 2D.

[0096] The pulling device 22 may include a first pulling member 221 and a second pulling member 221, 222. The first pulling member 221 may be connected to the first light-shielding layer 241 and configured to pull the first light-shielding layer 241. For example, an end region of the first light-shielding layer 241 may be fixed to the first pulling member 221. The second pulling member 222 may be connected to the second light-shielding layer 242 and configured to pull the second light-shielding layer 242. For example, an end region of the second light-shielding layer 242 may be fixed to the second pulling member 222.

[0097] The first and second pull members 221 and 222 can move relative to each other between a first and a second relative position. The first relative position of the first and second pull members 221 and 222 is shown in FIG. 2B, and the second relative position of the first and second pull members 221 and 222 is shown in FIG. 2C. When the first and second pull members 221 and 222 move from the first relative position to the second relative position, which may be achieved by driving the driving device 23, the first and second light-shielding layers 241 and 242 can move relatively parallel to each other. In this case, it is beneficial for the optical performance of the light-shielding curtain that the first and second light-shielding layers 241 and 242 do not separate from each other in the normal direction of the light-shielding curtain or that their relative positions do not change. When the first and second pull members 221 and 222 are in the first relative position, the light-shielding curtain 24 has a corresponding first light-transmitting property. In the second relative position of the first and second pull members 221, 222, the blackout curtain 24 has a corresponding second light transmittance. In the illustrated embodiment, the unfolding direction of the blackout curtain 24 may be the same as the direction R of movement of the first and second pull members 221, 222 relative to each other.

[0098] The pulling device 22 may include a spring element 223, which in the illustrated embodiment is configured as a pressure spring. The pulling device 22 may include a spring seat 224 disposed between the first and second pulling members 221, 222, and the spring element 223 is received in the spring seat. As shown in Figures 2B and 2C, the first pulling member 221 may include a first stop 22c, and the spring seat 224 may include an associated first counter stop 22d. The spring element 223 is supported at its end by the second stop 222 and exerts pressure on the first pulling member 221 at another end, so that the first stop 22c abuts against the first counter stop 22d, thereby determining the relative positions of the first pulling member 221 and the second pulling member 221, as shown in Figure 2B. The driving device 23 can drive the first stop member 221, for example, via the operating rod 5. While the blackout curtain 24 is driven from the inoperative retracted state to the operative deployed state, the first pulling member 221 drives the second pulling member 222 to move together by the spring force of the spring element. After the blackout curtain 24 reaches the activated deployed state, the second pull member 222 is stopped. When the first stop member 221 is further driven, for example by the operating rod 5, the spring force of the spring element 223 can be overcome, and thus the spring element 223 can be further compressed, and the first pull member 221 can continue to move forward in the direction of movement R with respect to the second pull member 222 at a displacement d1 until it reaches a second relative position as shown in Figure 2C. In the second relative position, the stop portion 22a of the first pull member 221 and the stop portion 22b of the second pull member 222 meet each other. 2C additionally shows a window frame 3 and glass 4 of a vehicle door. The window frame 3 may be provided with a receiving portion for receiving the pulling device 22. As an alternative to a pressure spring, an extension spring or a torsion spring or a combination of several spring elements may also be considered. As an alternative to a mechanical spring element, a resilient element made of an elastomer may also be considered. In an embodiment not shown, the holding force between the two pulling members may be realized by a releasable snap connection, magnetic force, or static friction force. In an embodiment not shown, only the second pulling device 222 of the two pulling members may be driven by the driving device 23, or the two pulling members may be driven by the driving device 23 at different times.

[0099] As can be seen in Figures 2D and 2E, the pulling device 22 may be flat. Here, the two pulling members 221, 222 may each have a flat body. The two pulling members may be arranged side by side in the thickness direction. Here, the second pulling member 222 may have an edge that curves toward the first pulling member 221. This curved edge may surround the first pulling member 221. The curved edge may extend over the entire circumference or may cover the circumference except for the back side. The curved edge may form a stop 22b on the front side. Such a pulling device 22 has a particularly compact configuration.

[0100] The pulling device 22 may include a linear guide portion, which may define the relative movement direction R of the first pulling member 221 and the second pulling member 222. In the illustrated embodiment, the linear guide portion includes a pair of guide grooves 226 in the first pulling member 221 and a pair of protrusions 227 in the second pulling member 222, which are guided within the guide grooves. When viewed from the height direction of the pulling device 22, which is perpendicular to the relative movement direction R of the first pulling member 221 and the second pulling member 222 and perpendicular to the thickness direction of the first pulling member 221 and the second pulling member 222, the pair of guide grooves 226 and the pair of protrusions 227 may be arranged symmetrically with respect to the spring element 223. In order to easily hold the two pulling members, the protrusions 227 are , protection The guide groove 226 may be engaged and held by the support plate 225. Alternatively, the holding plate 225 may be disposed between the first and second pulling members 221, 222. Alternatively, it may be connected to the first pulling member 221.

[0101] Two different embodiments of the upper guide rail structure of the shading device 20 will now be described with reference to Figures 3A and 3B. Here, two shading layers 241, 242 are partially illustrated in the height direction perpendicular to the unfolding direction. The guide rail 25 may be configured to receive and guide the upper longitudinal sides of the shading curtain 24 of the shading device 20. The guide rail 25 may have a groove 251. The upper longitudinal sides of the two shading layers 241, 242 of the shading curtain 20 can be at least partially received and guided by the groove 251 at least occasionally during the unfolding and retracting process of the shading curtain. The two shading layers 241, 242 may have support members 243, 244 on their longitudinal sides, respectively, or may be guided into the groove 251 by the support members. In the embodiment shown in FIG. 3A, the support members 243, 244 are arranged on the upper longitudinal outer surfaces of the light-shielding layers 241, 242, while in the embodiment shown in FIG. 3B, the support members 243, 244 are arranged at the end portions of the upper longitudinal sides of the light-shielding layers 241, 242.

[0102] Advantageously, the support members 243, 244 and the guide rail 25 can generate a mutual magnetic force, such as a magnetic attractive force and / or a magnetic repulsive force. For example, the support members 243, 244 can be magnets or at least partially made of a magnetic material, and the guide rail 25 can be magnets or at least partially made of a magnetic material.

[0103] In the embodiment shown in Fig. 3A, the guide rail 25 has two magnets 252, 253 that each interact with one of the support members 243, 244, and in the embodiment shown in Fig. 3B, the guide rail 25 has a common magnet 254 that interacts with the two support members 243, 244. The upper longitudinal sides of the two shading layers 241, 242 of the shading curtain 20 will be well received and guided in the grooves 251 of the guide rail 25 through the interaction of the magnets. When a vehicle equipped with the shading device 20 is traveling, vibrations may occur. Through the interaction of the magnets, the shading curtain 20 will obviously not be affected by the vibrations of the vehicle, and therefore will maintain good optical performance. A magnetic attractive force may be generated between the magnets of the guide rail 25 and the magnets of the blackout curtain. Alternatively, a magnetic repulsive force may be generated between the magnets of the guide rail 25 and the magnets of the blackout curtain. A combination of magnetic attractive and magnetic repulsive forces is also possible. A configuration in which only one of the support members is a magnet and the other support member is not a magnet is also possible. Another possibility is a configuration in which the support member 243 and the magnet 252 generate a magnetic attractive force, and the support member 244 and the magnet 253 generate a magnetic attractive force. Another possibility is a configuration in which the support member 243 and the magnet 252 generate a magnetic attractive force, while the support member 244 and the magnet 253 generate a magnetic repulsive force, and the support member 244 is disposed on the upper inner surface of the second shielding layer 242 in the longitudinal direction facing the first shielding layer 241.

[0104] In addition, the guide rail 26 may likewise be provided with grooves, and the guide rail 26 and the lower longitudinal sides of the blackout curtain 24 may be provided with magnet arrangements in the same or similar manner. In order to avoid repetition, reference may be made to the above description of the guide rail 25 and the upper longitudinal sides, unless otherwise stated.

[0105] 4A to 4C are schematic diagrams illustrating different states of the shading curtain 24 of the shading device 20 of FIGS. 1A to 1C. Here, the shading curtain 24 is viewed from the outside of the vehicle. In the illustrated embodiment, the two shading layers 241, 242 of the shading curtain 24 may be identically designed. To more clearly illustrate the two shading layers, they are shown offset in the height direction. In practice, the two shading layers may completely overlap in the height direction. Each shading layer 241, 242 may have first light-transmitting regions 241a, 242a and second light-transmitting regions 241b, 242b that are alternately and periodically arranged. Each light-transmitting area may extend transversely to the unfolding direction of the light-blocking curtain and may have a constant width. Advantageously, the first light-transmitting area 241 a, 242 a may be transparent or translucent, while the second light-transmitting area 241 b, 242 b may be opaque. Advantageously, the first light-transmitting area may have a smaller width than the second light-transmitting area. The light-blocking layer may be made of a flexible material such as fabric.

[0106] 4A shows the blackout curtain 24 in a first state. The first state may correspond to a first relative position of the first pull element 221 and the second pull element, in which the first light-transmitting regions 241a, 242a of the first and second light-blocking layers 241, 242 overlap and the second light-transmitting regions 241b, 242b of the first and second light-blocking layers 241, 242 overlap. This situation corresponds to the maximum light-transmitting state of the blackout curtain 24.

[0107] 4B shows the blackout curtain 24 in a second state, which may correspond to an intermediate position between the first and second relative positions. Here, the first light-transmitting regions 241a, 242a of the first and second light-blocking layers 241, 242 are displaced by a displacement d2 that is smaller than the relative movement displacement d1 of the first and second pull members 221, 222, and the second light-transmitting regions 241b, 242b of the first and second light-blocking layers 241, 242 are displaced by a displacement d2. This situation corresponds to an intermediate light-transmitting state of the blackout curtain 24.

[0108] 4C shows the blackout curtain 24 in a third state, which may correspond to a second relative position of the first and second pull members 221 and 222. The first blackout layer moves relative to the second blackout layer by a displacement d3, which may be equal to the relative movement displacement d1 of the first and second pull members 221 and 222. The first light-transmitting region 241a of the first blackout layer overlaps the second light-transmitting region 242b of the second blackout layer, and the second light-transmitting region 241b of the first blackout layer overlaps the first light-transmitting region 242a of the second blackout layer. This state corresponds to the minimum light-transmitting state of the blackout curtain 24.

[0109] In the embodiment shown in Figures 4A to 4C, the blackout curtain 24 continuously switches from the maximum light-transmitting state to the minimum light-transmitting state while the first and second pull members 221 and 222 are switching from the first relative position to the second relative position. In an embodiment not shown, the blackout curtain 24 may continuously switch from the minimum light-transmitting state to the maximum light-transmitting state when the first and second pull members 221 and 222 are switching from the first relative position to the second relative position. In an embodiment not shown, the blackout curtain 24 may continuously switch from the first light-transmitting state to the minimum light-transmitting state and then from the minimum light-transmitting state to the maximum light-transmitting state when the first and second pull members 221 and 222 are switching from the first relative position to the second relative position. This situation may correspond to a "larger relative motion displacement" between two blackout layers, or two pull members as they may be called.

[0110] FIG. 5 is a schematic diagram of another embodiment of the individual light-blocking layers 241, 242 for the blackout curtain 24. The two light-blocking layers may be identically configured. Each light-blocking layer has a grid-like transparent or semi-transparent first light-transmitting region 241a, 242a and an opaque second light-transmitting region 241b, 242b in the form of horizontal and vertical stripes. FIG. 6 is a schematic diagram of another embodiment of the individual light-blocking layers 241, 242 for the blackout curtain 24. The two light-blocking layers may be identically configured. Each light-blocking layer may have a continuous transparent or semi-transparent first light-transmitting region 241a, 242a and a regularly distributed plurality of circular opaque second light-transmitting regions 241b, 242b.

[0111] In some embodiments not shown, the blackout curtain includes a third blackout layer that may be configured the same as or different from at least one of the first and second blackout layers, and the third blackout layer may be configured to be movable or immovable relative to at least one of the first and second blackout layers. To this end, for example, the pulling device may have a third pulling member, or one pulling member may be configured to pull two of the three blackout layers together.

[0112] FIG. 7 is a schematic cross-sectional view of the housing 21 of the light-blocking device of FIGS. 1A to 1C. Two reels 13, 14 are arranged side by side within the housing 21, each provided with a return spring (not shown) acting in the winding direction. The first light-blocking layer 241 may be wound on the first reel 13 and guided onto the first guide edge 11 of the housing 21. The second light-blocking layer 242 may be wound on the second reel 14 and guided onto the second guide edge 12 of the housing 21. In an embodiment not shown, the two reels 13, 14 may be arranged one above the other in the cross-section of the housing 21, for example, they may completely or partially overlap. In an embodiment not shown, the first light-blocking layer 241 and the second light-blocking layer may be wound on a common reel.

[0113] It is understood that the present invention is described with reference to the above specific embodiments. However, the present invention is not limited thereto. Those skilled in the art can make modifications based on the disclosure in this application, and all such modifications will not depart from the scope of protection of the present invention. Individual technical features introduced in this application may be arbitrarily combined with each other, even if they are introduced in different paragraphs of the description or in different embodiments, as long as they are not contradictory. The present application provides the following aspects, for example: [Point 1] A shading device (20) including a shading curtain (24) having a first shading layer (241) and a second shading layer (242), the shading curtain (24) having at least two types of light-transmitting regions each having different light transmittance, a pulling device having a first pulling member (221) and a second pulling member (222), the first pulling member being connected to and configured to pull a first pulling layer, and the second pulling member being connected to and configured to pull a second pulling layer; the first pull member (221) and the second pull member (222) are movable relative to each other between a first relative position where the light-blocking curtain (24) has a first light-transmitting property and a second relative position where the light-blocking curtain (24) has a second light-transmitting property; The first light-shielding layer (241) and the second light-shielding layer (242) move parallel to each other. A shading device (20) characterized by: [Point 2] The blackout curtain (24) is switchable between an inoperative retracted state and an operative deployed state, and preferably the pulling device (22) is configured to pull the blackout curtain (24) from the inoperative retracted state to the operative deployed state; Preferably, the shading device (20) according to aspect 1 is characterized in that the unfolding direction of the shading curtain (24) is the same as the direction (R) in which the first pull member 221 and the second pull member move relative to each other. [Point 3] The shading device (20) comprises a driving device (23) configured to drive the pulling device (22); Preferably, the drive is an electric motor; Preferably, the driving device (23) is configured to drive the pulling device (22) so that the pulling device (22) moves as a whole to at least one of deploying and retracting the blackout curtain (24) and the first pulling member (221) and the second pulling member (222) move linearly relative to each other; Preferably, the shading device (20) according to aspect 1 or 2 is characterized in that the drive device (23) is configured so that the first pulling member 221 and the second pulling member (221, 222) can be switched to any intermediate relative position between the first relative position and the second relative position. [Point 4] The driving device (23) is configured to drive one of the pulling members of the pulling device (22), and preferably, the driving device (23) is configured to drive the same one pulling member of the pulling device (22) together during the unfolding movement of the light-shielding curtain (24) and during the movement of the first pulling member (221) and the second pulling member (222) following the unfolding movement. A shading device (20) according to aspect 3, characterized in that: [Point 5] The driving device (23) can drive the pulling device (22) by means of a support rod (5), and preferably, the support rod (5) can move in a plane; Preferably, the shading device comprises a guide rail (26) configured to receive and guide the support rod (5), and the drive device (23) is capable of driving the support rod (5) by a Bowden cable; More preferably, the guide rail (26) is further configured to receive and guide the longitudinal sides of the blackout curtain (24). A shading device (20) according to aspect 3 or 4, characterized in that: [Point 6] the first pulling member (221) and the second pulling member (222) can be held in one of the first relative position and the second relative position by the action of a holding force, and can be switched to the other of the first relative position and the second relative position by the holding force; Preferably, the first pulling member (221) and the second pulling member (222) can be held in one relative position by the holding force of the elastic element. A shading device (20) according to any one of aspects 1 to 5, characterized in that [Point 7] The elastic element is a spring element (223) that applies a force to one of the pull members relative to the other pull member in a first relative position, and the one pull member is translatable to a second relative position relative to the other pull member against the spring force of the spring element (223) with a predetermined displacement (d1). A shading device (20) according to aspect 6, characterized in that: [Point 8] the first and second relative positions of the first and second pulling members (221, 222) are determined by a pair of stops (22a, 22b, 22c, 22d) of the pulling device (22), respectively; Preferably, the first pulling member (221) and the second pulling member (221, 222) have stop portions (22a, 22b) at both ends for the second relative position. A shading device (20) according to any one of aspects 1 to 7, characterized in that [Point 9] the spring element (223) fixes, together with its other end, the first stop (22c) of the one pulling member to the other pulling member by applying a force against a first relative position on a first counter stop (22d) that is stationary relative to the other pulling member; Preferably, the pulling device (22) comprises a spring seat (224) disposed between the first pulling member (221) and the second pulling member (222); The spring element (223) is received in the spring seat (224), the spring seat (224) having a first counter stop (22d). A shading device (20) according to aspect 7 or 8, characterized in that [Point 10] The pulling device (22) has a linear guide portion that defines a direction (R) in which the first pulling member (221) and the second pulling member (222) move relative to each other, Preferably, the linear guide unit includes a guide groove (226) on one of the first pulling member (221) and the second pulling member (222), and a protrusion (227) on the other of the first pulling member (221) and the second pulling member (221, 222), and the protrusion can be guided along the guide groove; Preferably, the linear guide includes a pair of guide grooves (226) and a pair of protrusions (227) in a height direction of the pulling device (22) perpendicular to a direction (R) in which the first and second pulling members move relative to each other, and the spring element (223) is disposed at a center between the pair of guide grooves (226) and the pair of protrusions (227), and the spring element applies a force to the first pulling member and the second pulling member so that they are in the first relative position, Preferably, the protrusion (227) is a hook-shaped protrusion that engages with the guide groove (226) and is held by the holding plate (225), The holding plate (225) is disposed between the first pulling member (221) and the second pulling member (222) and is connected to one of the pulling members. A shading device (20) according to any one of aspects 1 to 9, characterized in that [Point 11] One of the first and second pulling members (221, 222) has a curved edge (26, 228) that surrounds the other of the first and second pulling members (221, 222). A shading device (20) according to any one of aspects 1 to 10, characterized in that: [Point 12] The first light transmittance corresponds to one of the maximum light transmittance and the minimum light transmittance of the light-blocking curtain (24), and the second light transmittance corresponds to the other of the maximum light transmittance and the minimum light transmittance of the light-blocking curtain (24), Preferably, each light-shielding layer includes first light-transmitting regions (241a, 242a) and second light-transmitting regions (241b, 242b) that are alternately and periodically arranged; Preferably, at least one of the area of ​​each first light-transmitting region is equal to or smaller than the area of ​​each second light-transmitting region, and the light transmittance of the first light-transmitting region is greater than the area of ​​the second light-transmitting region, Preferably, At the first relative position, the first light-transmitting regions of the first light-shielding layer (241) and the second light-shielding layer (242) overlap, and the second light-transmitting regions of the first light-shielding layer (241) and the second light-shielding layer (242) overlap; At the second relative position, at least one of the first light-transmitting region of the first light-shielding layer overlaps the second light-transmitting region of the second light-shielding layer and the second light-transmitting region of the first light-shielding layer overlaps the first light-transmitting region of the second light-shielding layer. 12. A shading device (20) according to any one of aspects 1 to 11, characterized in that: [Point 13] A shading device (20) according to any one of aspects 1 to 12, characterized in that the first shading layer (241) and the second shading layer (242) are each made of a flexible material and are in surface contact with each other. [Point 14] The shading device is configured for use in a vehicle, Preferably, the shading device is configured for a side window of a motor vehicle, Preferably, the blackout curtain (24) is configured to be deployed from one side of the front and the other side of the side window. A shading device (20) according to any one of aspects 1 to 4, characterized in that [Point 15] The shading curtain (24) is configured to be rolled up, and the shading device includes a return spring that acts on the shading curtain in the rolling direction. Preferably, the first light-shielding layer (241) and the second light-shielding layer (242) are provided with a reel and a return spring acting on the reel in the winding direction, respectively; Preferably, the shading device comprises a housing, in which the shading curtain (24) can be rolled up, and in which the reel and the return spring of the shading curtain (24) are housed; Preferably, the housing comprises a first guide edge (11) for the first light-shielding layer and a second guide edge (12) for the second light-shielding layer. A shading device (20) according to any one of aspects 1 to 14, characterized in that [Point 16] A shading device (20) according to any one of aspects 1 to 15, characterized in that the shading device comprises a guide rail (25) configured to receive and guide the longitudinal sides of the shading curtain. [Point 17] The guide rail has a groove (251), and the first and second light-shielding layers (241, 242) of the light-shielding curtain (24) have support members (243, 244) on their longitudinal sides. A shading device (20) according to aspect 16, characterized in that the first shading layer and the second shading layer are guideable by being received in grooves in a guide rail, the support member is a magnet, and the guide rail is provided with magnets (252, 253, 254) that cooperate with the magnets in the shading layers.

Claims

1. A shading device (20) including a shading curtain (24) having a first shading layer (241) and a second shading layer (242), the shading curtain (24) having at least two types of light-transmitting regions each having different light transmittances, The method further comprises a pulling device having a first pulling member (221) and a second pulling member (222), wherein the first pulling member is connected to a first pulling layer and configured to pull the first pulling layer, and the second pulling member is connected to a second pulling layer and configured to pull the second pulling layer; The first pull member (221) and the second pull member (222) are movable relative to each other between a first relative position where the light-blocking curtain (24) has a first light-transmittance and a second relative position where the light-blocking curtain (24) has a second light-transmittance that is lower than the first light-transmittance; The first light-shielding layer (241) and the second light-shielding layer (242) move parallel to each other, The at least two types of light-transmitting regions of each of the first light-shielding layer and the second light-shielding layer are a transparent or semi-transparent first light-transmitting region; an opaque second light-transmitting region; Equipped with A light-shielding device (20) in which the second light-transmitting regions are a plurality of circles arranged in a grid or regular distribution, and the first light-transmitting regions are the first light-shielding layer and the second light-shielding layer excluding the second light-transmitting regions.

2. The blackout curtain (24) is switchable between an inoperative retracted state and an operative deployed state; the pulling device (22) is configured to pull the blackout curtain (24) from the inoperative retracted state to the operative deployed state; 2. The shading device (20) of claim 1, wherein the deployment direction of the shading curtain (24) is the same as the direction (R) in which the first and second pull members move relative to each other.

3. The shading device (20) is characterized in that it comprises a driving device (23) configured to drive the pulling device (22), the drive device is an electric motor; The driving device (23) is configured to drive the pulling device (22) so that the pulling device (22) moves as a whole to at least one of deploying and retracting the blackout curtain (24) and the first pulling member (221) and the second pulling member (222) move linearly relative to each other; The shading device (20) according to claim 1 or 2, wherein the drive device (23) is configured so that the first pull member and the second pull member (221, 222) can be switched to any intermediate relative position between the first relative position and the second relative position.

4. the drive device (23) is configured to drive one of the pulling members of the pulling device (22), The shading device (20) of claim 3, wherein the drive device (23) is configured to drive the same one pull member of the pulling device (22) to each other during the unfolding movement of the shading curtain (24) and during the movement of the first pull member (221) and the second pull member (222) following the unfolding movement.

5. The driving device (23) is capable of driving the pulling device (22) by a support rod (5), The support rod (5) is movable in a plane; The shading device comprises a guide rail (26) configured to receive and guide the support rod (5), and the drive device (23) is capable of driving the support rod (5) by a Bowden cable; 5. The shading device (20) of claim 3 or 4, wherein the guide rail (26) is further configured to receive and guide the longitudinal sides of the shading curtain (24).

6. the first pulling member (221) and the second pulling member (222) can be held in one of the first relative position and the second relative position by the action of a holding force, and can be switched to the other of the first relative position and the second relative position by the holding force, 6. The shading device (20) according to any one of claims 1 to 5, wherein the first pull member (221) and the second pull member (222) are holdable in one relative position by the holding force of an elastic element.

7. The elastic element is a spring element (223) that applies a force to one of the pull members relative to the other pull member in the first relative position; 7. The shading device (20) of claim 6, wherein the one pull member is translatable to the second relative position with respect to the other pull member against the spring force of the spring element (223) with a predetermined displacement (d1).

8. The first relative position and the second relative position of the first pulling member (221) and the second pulling member (222) are determined by a pair of stops (22a, 22b, 22c, 22d) of the pulling device (22), respectively; 8. The shading device (20) according to any one of claims 1 to 7, wherein the first pull member (221) and the second pull member (221, 222) have stops (22a, 22b) at both ends for the second relative position.

9. the spring element (223) fixes, together with its other end, the first stop (22c) of the one pulling member to the other pulling member by applying a force against the first relative position on a first counter stop (22d) that is stationary with respect to the other pulling member; The pulling device (22) comprises a spring seat (224) disposed between the first pulling member (221) and the second pulling member (222); A shading device (20) according to claim 7 or claim 8 relying on claim 7, wherein the spring element (223) is received in the spring seat (224), the spring seat (224) being provided with a first counter stop (22d).

10. the pulling device (22) has a linear guide portion that defines a direction (R) in which the first pulling member (221) and the second pulling member (222) move relative to each other; A The linear guide unit has a guide groove (226) on one of the first pulling member (221) and the second pulling member (222), and a protrusion (227) on the other of the first pulling member (221) and the second pulling member (221, 222), and the protrusion can be guided along the guide groove; or B. In the height direction of the pulling device (22), the linear guide portion has a pair of guide grooves (226) and a pair of protrusions (227) perpendicular to the direction (R) in which the first pulling member and the second pulling member move relative to each other, and the spring element (223) is disposed at the center between the pair of guide grooves (226) and the pair of protrusions (227), and the spring element applies a force so that the first pulling member and the second pulling member are in the first relative position; The protrusion (227) is a hook-shaped protrusion that engages with the guide groove (226) and is held by the holding plate (225), The shading device (20) according to claim 7, or claim 8 or claim 9 which relies on claim 7, wherein the retaining plate (225) is arranged between the first pull member (221) and the second pull member (222) and is connected to one of the pull members.

11. A shading device (20) as described in any one of claims 1 to 10, characterized in that one of the first pulling member (221) and the second pulling member (222) has a curved edge portion (26, 228) that surrounds the other of the first pulling member (221) and the second pulling member (222).

12. The first light transmittance corresponds to a maximum light transmittance of the blackout curtain (24), and the second light transmittance corresponds to a minimum light transmittance of the blackout curtain (24), At the first relative position, the first light-transmitting regions of the first light-shielding layer (241) and the second light-shielding layer (242) overlap, and the second light-transmitting regions of the first light-shielding layer (241) and the second light-shielding layer (242) overlap; At the second relative position, the first light-transmitting region of the first light-shielding layer overlaps the second light-transmitting region of the second light-shielding layer, and the second light-transmitting region of the first light-shielding layer overlaps the first light-transmitting region of the second light-shielding layer.

12. The shading device (20) according to any one of claims 1 to 11, wherein the shading device (20) is at least one of:

13. A shading device (20) described in any one of claims 1 to 12, characterized in that the first shading layer (241) and the second shading layer (242) are each made of a flexible material and are in surface contact with each other.

14. The shading device is configured for a vehicle, The shading device is configured for a side window of a motor vehicle, The blackout curtain (24) is configured to be deployed from one side of the front and the other side of the side window. A shading device (20) according to any one of claims 1 to 4, characterized in that it comprises:

15. The shading curtain (24) is configured to be rolled up, and the shading device includes a return spring that acts on the shading curtain in the rolling direction. The first light-shielding layer (241) and the second light-shielding layer (242) each include a reel and a return spring acting on the reel in the winding direction; The shading device includes a housing, in which the shading curtain (24) can be wound up, and in which the reel and the return spring of the shading curtain (24) are housed; 15. The shading device (20) according to any one of the preceding claims, wherein the housing comprises a first guiding edge (11) for the first shading layer and a second guiding edge (12) for the second shading layer.

16. A shading device (20) according to any one of claims 1 to 15, characterized in that the shading device comprises guide rails (25) adapted to receive and guide the longitudinal sides of the shading curtain.

17. The guide rail has a groove (251), and the first and second light-shielding layers (241, 242) of the light-shielding curtain (24) have support members (243, 244) on their longitudinal sides; The shading device (20) of claim 16, wherein the first and second shading layers are guideable by being received in the grooves of the guide rail, the support member is a magnet, and the guide rail is provided with magnets (252, 253, 254) that cooperate with the magnets of the first and second shading layers.

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