Sun protection system especially for windows and doors with a magnetic center locking

Abstract

Sun protection system (10), in particular for windows or doors, comprising a sun protection system (19) with an upper profile rail (17b) and a lower profile rail (17a), which is installed so as to be able to be pulled upwards and / or downwards by means of two lateral tensioning cords (16), characterized in that the sun protection system has a central locking device (32, 33) comprising a first and a second unit, wherein the first unit (32) is installed within the upper profile rail (17b) and the second unit (33) is configured for attachment to a window or door frame, wherein furthermore the two units (32, 33) form a magnetic locking mechanism, so that for an upper position of the upper profile rails (17b), in which the first unit (32) is aligned with the second unit (33) of the central locking mechanism, a magnetic force from a magnetic attraction between the first and the second unit can at least partially compensate for bending loads on the upper profile rail (17b).

Description

[0001] The invention relates to a sun protection system, in particular for windows or doors, comprising a sun protection system with an upper profile rail and a lower profile rail, which is installed so as to be able to be pulled up and / or down by means of two lateral tensioning cords. The sun protection system has a central locking device which comprises a first and a second unit, wherein the first unit is installed within the upper profile rail and the second unit is configured for attachment to a window or door frame. The two units form a magnetic locking device, such that for an upper position of the upper profile rails, in which the first unit is aligned with the second unit of the central locking device, a magnetic force from a magnetic attraction between the first and the second unit can at least partially compensate for bending loads on the upper profile rail. Background and state of the art

[0002] The present invention relates to tensioned sun protection, pleated blinds, or honeycomb blinds. Tensioned pleated or honeycomb blinds comprise two continuous tension cords for operation, which can be pulled up from the bottom up or from the top down over profile rails along the vertical axis of the window (so-called bottom-up, top-down operation).

[0003] Such tensioned sun protection systems are available in various sizes for a wide variety of applications. Especially with sun protection systems with large widths or particularly heavy fabrics, deflection of the upper profile rail, which supports the textile sun protection and guides the tensioning cords, can occur. This deflection is often due to the weight of the sun protection itself and is further amplified by the distance between the rail attachment points and the weight of the sun protection system itself. This problem can be more pronounced with large window openings that require wide or long profile rails, or with particularly heavy fabrics and materials used in the sun protection systems.

[0004] This unwanted deflection of the profile rails leads to a number of negative consequences. Aesthetically, the deflection causes cracks that disrupt the overall appearance of the window treatment and diminish the visual impression of precision and quality. Functionally, the deflection can impair the movement of the pleated blinds, compromising their smooth operation and reliability. This can also impact the longevity of the system, as it can lead to uneven wear on the moving parts. Furthermore, the deflection of an upper profile rail can lead to a gap, which allows unwanted light to enter even when the sun protection system is in place.

[0005] Previous attempts to solve this problem by using standardized U-profiles that can be mounted on straight or rectangular window sills have proven inadequate, especially when they are to be installed on windows with large dimensions.

[0006] Furthermore, there are already products available on the market to counteract the deflection of profile rails. These products are often expensive, which reduces their appeal to customers and installers, or are specifically developed for certain systems or manufacturers. As a result, they are not universally applicable and therefore have only limited market penetration. Since these products are usually intended for initial installation, subsequent installation or retrofitting into existing systems is often not possible or involves disproportionately high costs.

[0007] DE 19 505824 A1 describes a compensation device for freely movable, tensioned pleated and honeycomb blinds, which is integrated into the operating profiles. An aluminum profile within the operating profiles builds up pressure. Connected to a thread, it bulges slightly upward with each rotation, thus compensating for the system's curvature caused by gravity. However, a disadvantage of such a device is that the system is associated with a correspondingly high cost factor and is only available as original equipment. Therefore, it is not possible to retrofit or install the system.

[0008] DE 10 2010 034 614 A1 describes a profile element for minimizing bending loads on a sun protection system. The profile element has a predetermined curvature in the unloaded state, allowing it to be elastically deformed toward a straight line or slightly beyond it under the forces acting upon it. The targeted pre-curvature makes it possible to compensate for deflection under load and ensure a visually appealing and technically advantageous appearance. The disadvantage of such a pre-curved profile element is, on the one hand, its more complex manufacturing process. On the other hand, the targeted plastic deformation can lead to material fatigue. Furthermore, the degree of pre-curvature must be specifically adapted to the weight of the sun protection system, which proves to be complex and impractical in practice.

[0009] In light of the state of the art, there is therefore a need for a tensioned sun protection, pleated blind or honeycomb system that is not only universally applicable and allows visual integration into various window shapes, but also ensures the functional and structural integrity of the sun protection system by effectively compensating for any bending forces on upper profile rails. Object of the invention

[0010] The object of the invention is to provide a sun protection system that eliminates the disadvantages of the prior art. In particular, a sun protection system is to be provided that enables robust and reliable integration of the sun protection system into a window or door frame using simple means, while effectively minimizing, in particular, the deflection of upper profile rails and the associated unwanted light penetration. Summary of the invention

[0011] The object of the invention is achieved by the independent claims. Preferred embodiments are disclosed in the dependent claims.

[0012] In a first aspect, the invention relates to a sun protection system, in particular for windows or doors, comprising a sun protection system with an upper profile rail and a lower profile rail, which is installed so as to be able to be pulled up and / or down by means of two lateral tensioning cords. The sun protection system has a central locking device which comprises a first and a second unit, wherein the first unit is installed within the upper profile rail and the second unit is configured for attachment to a window or door frame. The two units form a magnetic locking device such that for an upper position of the upper profile rails, in which the first unit is aligned with the second unit of the central locking device, a magnetic force from a magnetic attraction between the first and the second unit can at least partially compensate for bending loads on the upper profile rail.

[0013] For the purposes of the invention, the term "sun protection system" is generally understood as a device for shading a window or door opening. A sun protection system can therefore be a pleated blind, a honeycomb blind, a Venetian blind, or even a Roman blind.

[0014] For the purposes of the invention, the term "sun protection" preferably refers to the component of the sun protection system that provides shading. This can be, for example, a pleated blind, i.e., preferably a pre-folded (i.e., pleated) fabric, a Roman blind, or even a Venetian blind, i.e., preferably an arrangement of fixed or movable slats.

[0015] The cord-guided sunshade comprises upper and lower profile rails that extend across the entire width of the sunshade. In particular, the sunshade can be pulled up vertically using the side tensioning cords. The sunshade can be pulled up from bottom to top (bottom up) or from top to bottom (top down). The tensioning cords are preferably located on both sides of the sunshade to facilitate its pulling up. The ends of the tensioning cords preferably run through mounting shoes, whereby the sunshade can be hung on a window or door frame, a wall, or window trim using the side tensioning cords and the mounting shoes.

[0016] In the context of the invention, the term "center locking mechanism" preferably refers to the component of the sun protection system that ensures a fastening and connecting function between an upper profile rail of the sun protection system and the window or door frame. This center locking mechanism is designed as a two-part locking mechanism, with the first unit being specifically designed for installation within the profile rail of the sun protection system and, when installed, preferably positioned centrally within the upper profile rail.

[0017] The second unit of the center lock is designed to be permanently attached to the window or door frame. This unit serves as a stationary anchor point for the entire system. Its construction and fastening method are designed to create a permanent and stable connection to the window or door frame.

[0018] While the first unit is thus attached directly to or within the movable component of the sun protection system (upper profile rail), the second unit forms a counterpart to the first unit, permanently installed on the window or door frame or on the wall.

[0019] When the profile rail with the attached center locking unit is brought close to the unit fixed to the frame, the magnetic force of attraction causes the two parts to automatically and precisely come into contact. Preferably, the second center locking unit is located on the window or door frame in a position that essentially corresponds to the desired position of the upper profile rail with the window or door frame. This enables quick and secure locking of the upper profile rail in its highest position, without cumbersome handling or the risk of inaccurate fastening. The magnetic force ensures a firm hold and advantageously ensures that the profile rail of the sun protection system is stably positioned at the correct height and secured against unwanted movement or deflection.The user can also advantageously perceive this in the form of haptic feedback, as a magnetic snap.

[0020] A window or door frame preferably refers to a surrounding sash frame in which a glass pane is firmly inserted, preferably via corresponding glazing beads. The sash frame is preferably movable relative to a fixed outer (cover) frame. Without being limited to this, it can be, for example, a casement, tilt-and-turn casement, sliding casement, or another movable casement.

[0021] By providing the center locking mechanism, it is advantageously possible to reliably improve the aesthetics and functionality of such sun protection systems using simple means.

[0022] The magnetic center lock offers a simple, effective solution for reducing deflection of the profile rails. The magnetic attraction between the two units of the center lock contributes to the structural integrity of the system without the need for additional, visible support mechanisms. This not only improves the visual appearance of the system by ensuring consistently straight lines, but also increases the service life of the system because less tension is exerted on the components. The balanced bending load leads to improved smooth running of the pleated blinds. By stabilizing the profile rails, they can move more smoothly along their intended path, reducing wear and increasing user comfort.

[0023] Furthermore, the magnetic center locking mechanism also effectively prevents unwanted light penetration, which can occur if the upper profile rails bend.

[0024] Surprisingly, the magnetic center locking mechanism prevented deflection of the upper profile rail, particularly in particularly wide sun protection systems, for example, with widths of 1.5 m or more, or with particularly heavy fabrics. In contrast to known approaches in the prior art, which, for example, require complex stabilization of the upper profile rail from the side, the invention recognized that, when positioning a locking mechanism preferably substantially in the center of an upper profile rail, even relatively low magnetic forces are sufficient to effectively compensate for any bending loads on the upper profile rail.

[0025] In preferred embodiments, the upper profile rail can have a width of more than 1500 mm and / or the sun protection can have a height of more than 1500 mm when pulled up.

[0026] A further advantage of the magnetic center lock is that it is compact and can be integrated into the product during the manufacturing process, preferably in a particularly simple manner, for example, by sliding or clipping. This enables high flexibility and efficiency in production. Furthermore, the design of the center lock offers the possibility of being clipped in retrospectively—after the product has been completed. This means that, in preferred embodiments, users also have the option of installing or replacing the center lock at a later date without the need for major adjustments or modifications. This aspect underscores the adaptability and user-friendliness of the system.

[0027] In a preferred embodiment, the first unit of the center locking device is adapted to the cross-sectional shape of the upper profile rail for sliding use.

[0028] This adjustment allows for a harmonious integration of the center locking mechanism into the profile rail, improving the aesthetic appearance of the overall system. Since the locking unit is seamlessly integrated into the profile, there are no protruding parts that would detract from the design or be noticeable to the touch.

[0029] The sliding insertion of the first unit also offers the advantage of quick and uncomplicated installation. The adaptation of the center locking mechanism to the cross-section of the upper profile rail allows the unit to be inserted into the profile rail without the use of special tools or excessive force. This simplifies the installation process, as well as any maintenance work or the replacement of parts. The adaptation of the locking unit to the profile rail also advantageously minimizes play in the system when installed. This increases the overall quality of the sun protection system, as precise and safe operation is ensured.

[0030] The sliding unit can be moved, in particular, along the profile rail to achieve a desired locking position. Preferably, the first unit is displaced such that it is positioned centrally along the profile rail. For the purposes of the invention, the "center of the upper profile rail" preferably refers to a central position located at a distance of 40% to 60%, preferably approximately 50%, of the total length of the profile rail from a starting or end point of the profile rail.

[0031] The central positioning ensures that the profile rail is supported at its center, precisely where bending would be most severe without appropriate countermeasures. This not only contributes to stability but also prevents the rail from sagging, which would compromise the aesthetic appearance in terms of straight lines and functionality in terms of unwanted light penetration. Central positioning of the magnetic locking mechanism therefore guarantees that the sun protection functions perfectly even under intensive use.

[0032] Preferably, more than one center lock, i.e. more than one first unit, can be used along the profile rail, particularly in wider systems or when the sun protection is made of particularly heavy material. Distributing the bending load across multiple locking units further reduces the risk of deflections. By having each center lock carry part of the load, the stress on individual components is minimized, which reduces the likelihood of material fatigue and resulting damage. In particular, in the case of 2, 3, 4, 5 or more center locks (or a corresponding number of units in the upper profile rail and on the door or window frame), it may be preferable to arrange these substantially centrally or substantially symmetrically around a center of the profile rail. An equidistant arrangement may also be preferred.

[0033] Advantageously, by providing several center locks, positioning of the paired units along the profile rail can be optimized in such a way that deflection is particularly effectively reduced depending on the distribution of the bending load along the profile rail.

[0034] Terms such as substantially, approximately, etc. preferably describe a tolerance range of less than ± 20%, preferably less than ± 10%, particularly preferably less than ± 5%, even more preferably less than ± 1% and in particular include the exact value.

[0035] For the purposes of the invention, "adapting the center locking mechanism to the cross-section of the upper profile rail" preferably means that a cross-section of the center locking mechanism is at least partially congruent with the cross-section of the profile rail. Depending on the shape of the profile rails, the center locking mechanism can preferably be designed to meet the specific requirements and properties of the respective system. For example, the center locking mechanism can be adapted to the Benthin and Cosiflor systems known on the market.

[0036] The Benthin system features horizontally closed rails for tensioned pleated blinds. This system uses a plastic cover that is slid onto the rail after the fabric is attached and secured with end caps.

[0037] In contrast, the Cosiflor system consists of a solid aluminum rail that is punched or milled out on the sides for the end caps. The magnetic center lock can be adapted, particularly in terms of width, to the horizontal sliding rails of these systems, allowing it to be both inserted and clipped in to ensure secure fastening.

[0038] In a preferred embodiment, the first unit of the center lock can be positioned seamlessly on the profile rail with a seamless transition. This results in both a visually appealing integration into the profile rail and the elimination of edges. Because the first unit of the center lock is specifically designed for positive fastening, a particularly tight and precise connection is created between the center lock and the profile rail.

[0039] In a further preferred embodiment, the first unit of the center locking device has a width of 2-10 cm, preferably 4-6 cm, and a depth of 1-2 cm, preferably 1.2 cm-1.8 cm, particularly preferably 1.3 cm-1.6 cm. For the purposes of the invention, the term "width of the first unit of the center locking device" preferably refers to a dimension along the direction in which the first unit is inserted along the profile rail. In contrast, the terms "height" and "depth" of the first unit of the center locking device preferably refer to dimensions in an orthogonal direction thereto, which characterize the cross-section of the profile rail.

[0040] Such a design adapts optimally to a variety of profile rails that are frequently used in practice. With the preferred dimensions, the first unit can be kept compact while simultaneously offering a large contact surface for magnetically connecting it to the second unit, which is fixed in the frame, ensuring particularly firm and secure attachment. These dimensions are therefore large enough to allow effective distribution of bending forces over a larger area of the profile rail, which helps to increase the stability of the entire sun protection system. On the other hand, they are not so large that handling the center locking mechanism would be difficult.

[0041] In a further preferred embodiment, the first unit of the center locking mechanism has at least one recess for receiving a magnetic or ferromagnetic insert, preferably two recesses. Sunshades equipped with lighter fabrics require fewer magnetic or ferromagnetic inserts and consequently a lower attraction force. In contrast, systems with heavier fabrics, such as blackout honeycomb fabrics, require a stronger magnetic attraction force to ensure a secure hold. This is crucial to ensure reliable locking and thus optimal functionality despite the heavier weight of the fabric.

[0042] In a further preferred embodiment, the first unit of the center lock has a recess whose height essentially corresponds to the height or thickness of the plate. By adapting the recess height to the plate, a seamless and smooth finish is achieved and the incidence of light is effectively minimized. The precise coordination with the geometry of the selected profile not only ensures an aesthetically pleasing finish, but also a stable and secure connection between the center lock and the profile. This ensures reliable functionality and a secure hold, even with heavy fabrics. The recess is designed to seamlessly integrate a plate and thus ensures optimal adaptation to the cross-section of the profile. The height of the recess is preferably in a range of 0.5 to 6 mm.A height of 1 to 4 mm is preferred, with a height of about 4 mm being particularly preferred.

[0043] In a further preferred embodiment, the first unit of the center locking mechanism has a rectangular basic shape in cross-section and, extending from the two lateral outer walls, each has a projection that tapers outward. These projections are designed to extend across the entire width of the center locking mechanism and offer functional advantages. Due to the positive design of the projections, they can, in particular, create a stable and secure connection with a corresponding profile rail or the grooves present therein. This ensures optimized connection and anchoring of the first unit of the center locking mechanism to the profile rail.The continuous extension of the projections along the entire width of the first center locking unit can provide even load distribution and increased resistance to lateral forces that may occur during operation of the sun protection system.

[0044] The dimensions of these projections vary depending on the specific shape of the recess. For example, if thicker plates are used and the recess is designed accordingly, the projections extend accordingly in the areas along the width of the first center lock unit that are not traversed by the recess. This enables structural integrity and a stable connection without compromising the functional performance of the recess or the plates.

[0045] If thinner plates are used and the recess is correspondingly smaller, it may also be preferable for the projections to be arranged continuously along the entire width of the first unit of the center locking device.

[0046] Depending on whether the locking mechanism is integrated during production, added as a retrofit, or needs to be adapted for another system, the shape of the first unit of the center locking mechanism can be easily adjusted in height. This allows for a customized solution for different requirements and applications. The height of the first unit of the center locking mechanism is preferably in the range of 4-10 mm, with particularly preferred heights in the spectrum of 4.5-7 mm. This ensures that the locking mechanism functions optimally in a wide variety of scenarios and guarantees a reliable connection.

[0047] The various designs of the center lock have been specifically designed to meet a wide range of loading requirements. Each specific variant of the basic design brings its own structural advantages and is optimized to accommodate specific loads and stresses. This variety in designs means there is a suitable locking solution for almost every conceivable loading situation.

[0048] Systems with heavier fabrics, such as blackout honeycomb, require a stronger magnetic attraction to ensure a secure hold. This is crucial to ensure reliable locking and optimal functionality despite the heavier fabric weight.

[0049] Depending on the specific load or the requirements of the area of application, different sizes of inserts are selected to ensure optimal hold and the desired functionality. The inserts can have a different shape, for example they can be circular, rectangular, triangular or another polygonal shape in cross-section, with a cross-section of the recesses being congruent to the magnetic or ferromagnetic inserts. In preferred embodiments, the inserts are flat, i.e. a thickness or height of the inserts is less than their cross-sectional dimension (length, width or diameter). The inserts with a rectangular, triangular and / or another polygonal shape have a cross-sectional dimension (width or depth) preferably in the range of 2-20 mm, more preferably in the range of -5 to 15 mm, particularly preferably 8 mm - 12 mm.

[0050] The inserts with a circular cross-section preferably have a diameter of 2-20 mm, preferably 5-15 mm, preferably a diameter of 8-12 mm.

[0051] Thicknesses or heights can, for example, range from 0.5 mm to 3 mm.

[0052] A particularly preferred embodiment of these inserts is a flat circular disc.

[0053] In a further preferred embodiment, the recesses have different depths to ensure optimal positioning and retention of the magnets. The preferred depth is in the range of 0.5-3 mm, with a depth of approximately 1 mm being particularly preferred. These depths allow for precise placement of the magnets and ensure that they remain securely and firmly in the intended position.

[0054] To further secure the magnets in the inserts, various fastening materials can be used. These include a suitable adhesive that ensures a permanent and strong connection, as well as clamping elements that provide mechanical security and give the magnets additional stability.

[0055] In another preferred embodiment, the magnets are permanent magnets made of high-quality materials such as neodymium, samarium cobalt, or ferrite. This material selection guarantees high magnetic force and durability, ensuring the functionality and reliability of the entire center locking unit over an extended period of time.

[0056] In a preferred embodiment, the first unit of the center lock is made of a plastic selected from a group including materials such as polyethylene, polylactide, polycarbonate, polypropylene, and polyvinyl chloride. The choice of this plastic offers several advantages over traditional, metallic locking unit designs. First, the use of plastic allows for simplified and more flexible manufacturing. The thermoplastic properties of many of these plastics allow them to be easily formed into the desired shape, which speeds up production and increases the possibilities for customized designs. Furthermore, the cost of manufacturing plastic locks is generally lower than that of metallic alternatives. This results in cost-effectiveness that is beneficial for both manufacturers and end users.

[0057] Another particular advantage is that choosing a plastic material for the first unit of the center lock provides elasticity, which makes it easier to snap into place in the profile rail. The elastic properties of the plastic material enable better adaptation to the contours and structures of the profile rail. When inserting the first unit of the center lock, the elasticity can help the unit to snap effortlessly into the intended position. This not only improves user-friendliness, but also ensures that the first unit of the center lock is securely and stably anchored in the profile rail. In addition, the elasticity of the plastic material allows a certain degree of flexibility when handling the unit during the installation process. This facilitates assembly and compensates for any play.

[0058] Furthermore, plastics are lighter than many metals. This significantly reduces the overall weight of the center locking unit. A lower weight also makes the unit easier to install and handle.

[0059] In a preferred embodiment, the second unit of the center locking device serves as a counterpart to the first unit of the center locking device, wherein preferably in the case of providing at least one magnetic insert in the first unit of the center locking device, the second unit of the center locking device comprises a ferromagnetic plate or a magnetic plate, and wherein in the case of providing at least one ferromagnetic insert, the second unit of the center locking device comprises a magnetic plate.

[0060] If a magnetic insert is provided in the first unit of the center lock, the second unit of the center lock preferably comprises a ferromagnetic plate made of a ferromagnetic material or a magnetic plate that preferably comprises a permanent magnet. The ferromagnetic material can preferably be a ferromagnetic metal such as iron, nickel, or cobalt. Alternatively, the ferromagnetic material can comprise a ferromagnetic alloy, such as AlNiCo, SmCo, Nd2Fe14B, Ni80Fe20 ("permalloy"), or NiFeCo alloys ("mumetal"). The permanent magnet can preferably be made of aluminum-nickel-cobalt, neodymium, samarium-cobalt, and / or a ferrite.

[0061] In a further variant, when a ferromagnetic insert is provided, the second unit of the center locking device preferably comprises a magnetic plate, which preferably comprises a permanent magnet. The permanent magnet can preferably also be made of the aforementioned materials, such as aluminum-nickel-cobalt, neodymium, samarium-cobalt, and / or a ferrite.

[0062] These materials ensure that the plate possesses maximum magnetic properties, increasing the efficiency and security of the entire locking unit. Iron, nickel, and neodymium are known for their strong magnetic properties. Choosing these materials for a ferromagnetic plate ensures that it creates a robust and reliable magnetic connection to the first unit of the center lock when the two units are brought together. This not only guarantees a secure connection but also simple and intuitive assembly and disassembly, significantly facilitating the overall operation and handling of the center lock.

[0063] The second unit of the center locking mechanism, also referred to as the "plate" due to its preferably flat design, is specifically configured to be attached to a window or door frame and can be attached to the window or door frame using various fastening methods, such as a screw connection. The plate, which serves as the counterpart to the first unit of the center locking mechanism, is an essential component of the sun protection system.

[0064] For this purpose, appropriate holes may be provided in the plate. This type of fastening not only ensures secure and permanent installation but also allows for easy installation and, if necessary, trouble-free removal. Depending on the specific requirements and the frame material, alternative fastening methods such as gluing or clamping may also be preferred.

[0065] Attaching the plate to the door or window frame ensures that when the pleated blind is pulled up, the first unit of the center locking mechanism attached to the profile rail comes into direct contact with the second unit on the window or door frame.

[0066] Both the variant with a magnetic insert in the first unit of the center locking mechanism combined with the second unit of the center locking mechanism, designed as a ferromagnetic or magnetic plate, and the variant with a ferromagnetic insert combined with the second unit of the center locking mechanism, designed as a magnetic plate, create a strong magnetic attraction between the first and second units. This attraction ensures that the two units securely lock together.

[0067] The plates are preferably rectangular in shape and are characterized by a height of 0.5 to 6 mm, preferably by a height of 1 to 4 mm, particularly preferably by a height of about 4 mm. The width, which in the installed state preferably corresponds to the dimension of the orientation of the elongated profile rail, extends in the range of 1 to 6 cm, preferably in the range 2 to 5 cm, particularly preferably about 4 cm, while the depth (dimension orthogonal to the width) extends in the range between 0.5 and 2 cm, preferably 1 and 2 cm, particularly preferably about 1.5 cm. The result of this magnetic locking is that the profile rail is held effectively and securely in position, with the center lock being flush with the upper pleated blind rail. This magnetic holding force offers the decisive advantage of considerably reducing bending loads that could act on the rail.This not only reduces the risk of deformation or damage to the profile rail, but also ensures improved longevity and stability of the entire sun protection system.

[0068] In a preferred embodiment, the sun protection system comprises two vertical side profiles between which the sun protection is installed with the upper profile rail and lower profile rail. The side profiles fasten the sun protection in a vertical or longitudinal direction (i.e. vertically). The vertical length of the side profiles preferably depends on the height or length of the sun protection, i.e. in particular the height or length of a fully extended sun protection, for example a pleated blind in an almost unfolded state. The sun protection itself has upper and lower profile rails, wherein the sun protection, for example a pleated blind, is opened by pulling the profile rails apart or by gripping the profile rails. The upper and lower profile rails preferably extend over the entire width of the sun protection (e.g. a pleated blind).

[0069] In a further preferred embodiment, the side profiles each have two inner walls between which a gap remains, and wherein the sun protection is installed in such a way that the lateral tensioning cords (within the side profiles) can be guided inaccessibly behind the inner walls. Preferably, the gap provided between the inner walls is large enough that, for example, a cord guide can protrude into the side profile, but not a hand or finger of children or toddlers. For example, it may be preferred that the gap is less than 10 mm, preferably less than 8 mm, less than 5 mm. At the same time, it may be preferred that the gap is at least 2 mm, preferably at least 2 mm wide.

[0070] When installing the sun protection, the tensioning cords are preferably laid through the gap behind the inner walls of the side profiles so that the tensioning cords are not accessible to children, for example. The tensioning cords are preferably located on both sides of the sun protection to allow the sun protection to be pulled up within the side profiles and are therefore also referred to as side tensioning cords. The safety of the application is further increased by the internal design of the tensioning cords within the side profiles. Since the cords are hidden behind the inner walls and thus inaccessible to children, the risk of injury or strangulation is minimized. This is a particularly important aspect in households with small children, as safety in the home is a high priority.

[0071] In a preferred embodiment, the sun protection system is characterized in that the inner walls each extend inwards from a front and a rear outer wall of the side profile towards each other without touching, so that the gap remains. The front and rear outer walls preferably denote surfaces of the side profile which lie parallel to the plane in which the sun protection (e.g. the pleated blind) is stretched. In this case, a rear outer wall of the side profile can, for example, face a window or door frame, while a front outer wall of the side profile faces the interior. The side profiles preferably surround the sun protection on both sides in such a way that the respective gaps in the side profiles left by the inner walls face each other and enclose the sun protection.An outer wall of the side profile facing away from the gap preferably represents a lateral, outer boundary of the sun protection system.

[0072] The vertical side profiles preferably specify a maximum extension along their height, along which the sunshade can be extended. The width, on the other hand, preferably measures the lateral, unchangeable extension of the sunshade and defines the spacing between the side profiles installed on both sides of the sunshade.

[0073] The inner walls within the side profiles are preferably arranged orthogonally to the front and / or rear outer wall and therefore preferably run parallel to those outer walls of the side profile which laterally delimit the sun protection system.

[0074] The inner walls are preferably directed toward each other, so that the inner walls are aligned in a straight line or flush. However, the inner walls do not touch each other, but rather leave a gap, as described.

[0075] The height of the inner walls (and thus of the gap) preferably corresponds to the height of the outer walls of the side profile, which, as described, is preferably related to the height of the sun protection in a fully extended or opened state.

[0076] For the purposes of the invention, a height or length preferably refers to a dimension along the direction in which the sunshade can be pulled up and / or down, while a width preferably refers to a dimension in an orthogonal direction that lies in the plane of the extended sunshade. The sunshade therefore preferably spans a surface whose height can be changed by pulling it up and down accordingly, while the width of the surface remains unchanged.

[0077] The vertical side profiles preferably specify a maximum extension along which the sunshade can be extended. The width preferably measures the lateral, unchangeable extension of the sunshade and defines the spacing between the side profiles installed on both sides of the sunshade.

[0078] A depth, on the other hand, preferably refers to a dimension orthogonal to the height and width. The depth of the side profiles therefore preferably measures the distance between a front and rear outer wall of the side profile. The depth of the gap preferably corresponds to the distance between the vertical inner walls.

[0079] In a preferred embodiment of the invention, end caps are attached to the ends of the side profiles, with the sunshade being suspended between the end caps by means of the lateral tension cords. The end caps are preferably attached to an upper and lower end of the side profiles, so that the end caps represent an upper and lower limit of the vertical side profiles.

[0080] For this purpose, the end caps can have, at least in sections, a cross-section congruent with the side profiles and integrated rail inserts, which enables the end caps to be fitted onto the ends of the side profiles.

[0081] In preferred embodiments, the side profiles are made of a material comprising metal, preferably aluminum or plastic, wherein the side profiles preferably have a wall thickness between 0.5 mm and 1 mm.

[0082] The end caps can also be made of metal, such as steel or aluminum, or of plastic and preferably fit snugly onto the side profiles.

[0083] The side tensioning cords are preferably attached directly or indirectly to the end caps to allow the sunshade to be suspended within the side profiles. For this purpose, the end caps can have an integrated mounting base onto which a mounting bracket or mounting shoe for the sunshade can be slid.

[0084] In a further preferred embodiment, the sun protection itself has upper and lower profile rails, wherein the sun protection, for example a pleated blind, is opened by pulling the profile rails apart or by gripping the profile rails, as described. The upper and lower profile rails preferably extend across the entire width of the sun protection (e.g. a pleated blind), wherein laterally projecting cord guides are preferably arranged on the upper and lower profile rails. The cord guides preferably project laterally beyond the profile rails of the sun protection and are therefore also referred to as projecting cord guides and make it possible to increase the distance between the tensioning cords on the sides of the sun protection.

[0085] The tension cords are guided from the cord guides of the profile rails, preferably vertically, to the corresponding front cord guides of the respective mounting shoes into a channel in the mounting shoes. The tension cords can preferably be fixed to the mounting shoes using adjusting screws. The mounting shoes, on the other hand, are preferably attached to the mounting base of the end cap via the respective mounting slots, with the tension cords each extending through the gap in the inner walls into the side profile in such a way that the tension cords are guided behind the inner walls, inaccessible, especially to children.

[0086] The cord guides projecting to the side thus make it particularly easy to bring the lateral tensioning cords behind the inner walls, while the tensioning cords are necessarily aligned vertically for proper top-down and bottom-up operation.

[0087] Preferably, the tension cords are automatically or inevitably correctly aligned by the corresponding cord guides, with the tension cords running vertically behind the inner walls from the cord guides to the end caps, preferably to a mounting shoe, via a cord guide channel mounted on a base of the end cap. The tension cords can be attached to the mounting shoe using a fastening element. The tension cords are preferably fixed using adjusting screws.

[0088] Such an arrangement also advantageously avoids any installation errors, since correct installation of the sun protection by sliding the mounting bracket onto the end caps inevitably leads to correct positioning of the tension cords.

[0089] In the case of incorrect installation, where the tension cords are in front of the interior walls, they are not guided vertically, so that the sun protection cannot be pulled up properly. CHARACTERSShort description of the characters Fig. 1 Schematic representation of a preferred embodiment of the sun protection system according to the invention with a first unit of the central locking Fig. 2 Schematic representations of a preferred embodiment of a center locking unit according to the invention: perspective view (A), top view (B), side view (C), front view (D) Fig. 3 Schematic representations of a preferred embodiment of a center locking unit according to the invention: perspective view (A), top view (B), side view (C), front view (D) Fig. 4 Schematic representations of a preferred embodiment of a center locking unit according to the invention: perspective view (A), top view (B), side view (C), front view (D) Fig. 5 Schematic representations of a preferred embodiment of a center locking unit according to the invention used in a profile rail: perspective view (A), front view (B) Fig. 6 Schematic representations of a preferred embodiment of a center locking unit according to the invention used in a profile rail: perspective view (A), front view (B) Detailed description of the characters

[0090] Fig. 1 shows a schematic representation of a preferred embodiment of a sun protection system 10 according to the invention. The sun protection system 10 comprises a sun protection 19, which is installed so as to be pulled up and / or down by means of two lateral tensioning cords 16.

[0091] The cord-guided sun protection 19 comprises upper profile rails 17b and lower profile rails 17a, which extend across the entire width of the sun protection 19. In particular, the sun protection 19 can be pulled up in a vertical longitudinal direction by means of the lateral tensioning cords 16. The sun protection 19 can be pulled up both from bottom to top (bottom up) and from top to bottom (top down). The tensioning cords 16 are preferably located on both sides of the sun protection 19 to enable the sun protection 19 to be pulled up. The ends of the tensioning cords 16 preferably run through mounting shoes 18, wherein the sun protection 19 can be hung on a wall, window frame, or door frame by means of the lateral tensioning cords 16 via the mounting shoes 18.

[0092] The upper profile rail 17 is equipped with a first center locking unit 32 that is inserted into the profile rail 17. The shown first center locking unit 32 has two circular recesses that are specifically designed to receive inserts. To securely attach the inserts to the center locking unit 32, they can be glued or clamped, for example, as explained elsewhere herein. For higher loads, such as with blackout pleated fabrics, it is possible to attach additional first units 32 to the upper profile rail 17. When the pleated blind is pulled upwards over the upper profile rail 17, the first center locking unit 32 comes into contact with the second center locking unit 33. The second unit 33, which is not shown here, can comprise a plate, for example.The first unit of the center lock 32 can, for example, comprise one or more magnetic inserts, while the second unit of the center lock 33 is configured as a ferromagnetic plate. An inverted arrangement is also conceivable, in which the first unit of the center lock 32 comprises one or more ferromagnetic inserts, while the second unit of the center lock 33 is configured as a magnetic plate.

[0093] The interaction between the insert in the first unit 32 and the plate in the second unit 33 creates a magnetic attraction that ensures that the two units are securely locked together.

[0094] The magnetic center lock thus offers a simple, effective solution for reducing deflection of the profile rails. The magnetic attraction between the two units of the center lock contributes to the structural integrity of the system without the need for additional, visible support mechanisms. This not only increases the service life of the system, as less stress is exerted on the components, but the balanced bending load also leads to improved smooth operation of the pleated blinds. Furthermore, the magnetic center lock also effectively prevents unwanted light penetration, which can occur if the upper profile rails deflect.The magnetic center locking mechanism can advantageously prevent the upper profile rail from sagging, particularly in the case of particularly wide sun protection systems, for example with widths of 1.5 m or more or particularly heavy fabrics.

[0095] Fig. Figure 2 shows various views of a preferred embodiment of a first unit 32 of the center locking mechanism. The center locking mechanism 32 has a rectangular basic shape in cross-section and, extending from each of the two lateral outer walls, has a projection 36 that tapers outwardly. These projections are designed to extend along the entire width of the lateral outer wall or the width of the first unit 32 of the center locking mechanism. The center locking mechanism has two recesses 35 configured to receive magnetic or ferromagnetic inserts, which are not shown in detail.

[0096] Fig. Figure 3 shows various views of a preferred embodiment of a first unit 32 of the center locking mechanism. The first unit of the center locking mechanism has a recess 34 whose height corresponds exactly to the height or thickness of the plate. The center locking mechanism has two recesses 35 for inserts configured to receive magnetic or ferromagnetic plates, which are not shown in detail. Compared to the embodiment of Fig. 2, the recesses 35 have a larger diameter, which depends on the load to be supported. In this embodiment, the central locking unit 32 has a rectangular basic shape along its cross-section and, starting from the two lateral outer walls, two projections 36 each, which taper outward along the width of the first central locking unit 32. If, for example, thicker plates are used and the recess 34 is designed accordingly, the projections run accordingly in the areas along the width of the first central locking unit 32 that are not traversed by the recess.

[0097] Fig. 4 shows various views of a preferred embodiment of a first unit 32 of the central locking mechanism. The first unit 32 of the central locking mechanism has a recess 34 whose height corresponds exactly to the height or thickness of the plate. In this embodiment, the first unit 32 of the central locking mechanism has a stepped basic shape along its cross-section and a projection 36 extending from the two lateral outer walls. The projection 36 tapers outward. In this embodiment, the unit 32 has only one recess 35 for magnetic or ferromagnetic plates.

[0098] Fig. 5 and Fig.6 each show a profile rail 17, into which a first unit 32 of the center locking mechanism is inserted. Due to the positive design of the rail inserts 34 and the projections 36, they can establish a stable and secure connection with a corresponding profile rail 17. This ensures optimized connection and anchoring of the center locking mechanism 32 to the profile rail 17. Depending on whether the locking mechanism 32 is already integrated during production, added as a retrofit solution, or needs to be adapted for another system, the shape of the first locking unit 32 can be easily adapted. LIST OF REFERENCE SYMBOLS 10 Sun protection system 16 tension cord 17 upper profile rail 17a lower profile rail 18 Mounting shoe 19 Sun protection 28 Magnet 29 Handle 31 cord guides 32 first unit of the center locking 33 second unit of the center locking 34 recess 35 Deepening 36 lead QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 19 505824 A1

[0007] DE 10 2010 034 614 A1

[0008]

Claims

[1] Sun protection system (10), in particular for windows or doors, comprising a sun protection system (19) with an upper profile rail (17b) and a lower profile rail (17a), which is installed so as to be able to be pulled upwards and / or downwards by means of two lateral tensioning cords (16), characterized by , that the sun protection system has a central locking device (32, 33) comprising a first and a second unit, wherein the first unit (32) is installed within the upper profile rail (17b) and the second unit (33) is configured for attachment to a window or door frame, wherein furthermore the two units (32, 33) form a magnetic locking mechanism, so that for an upper position of the upper profile rails (17b), in which the first unit (32) is aligned with the second unit (33) of the central locking mechanism, a magnetic force from a magnetic attraction between the first and the second unit can at least partially compensate for bending loads on the upper profile rail (17b). [2] Sun protection system (10) according to the previous claim characterized by that the upper profile rail (17b) has a width of more than 1500 mm and / or the sun protection (19) has a height of more than 1500 mm when pulled up. [3] Sun protection system (10) according to one of the preceding claims characterized by that the first unit of the central locking device (32) is adapted to the cross-sectional shape of the upper profile rail (17b) for sliding use. [4] Sun protection system (1) according to one of the preceding claims characterized by that the first unit of the central locking device (32) has rail inserts (34) for positive fastening to the profile rail (17), wherein the rail inserts (34) extend laterally outwards and preferably have a thickness of 0.5 mm to 5 mm. [5] Sun protection system (1) according to one of the preceding claims characterized by that the first unit of the central locking device (32) is made of a plastic, wherein the plastic is preferably selected from the group consisting of polyethylene, polylactide, polycarbonate, polypropylene and polyvinyl chloride. [6] Sun protection system (1) according to one of the preceding claims characterized by that the first unit of the central locking (32) has a width of 2-10 cm, preferably 4-6 cm and a depth of 1-2 cm, preferably 1.2 cm - 1.8 cm, particularly preferably 1.3 cm - 1.6 cm. [7] Sun protection system (1) according to one of the preceding claims characterized by that the first unit of the central locking device (32) has at least one recess (35) for receiving a magnetic or ferromagnetic insert, preferably two recesses (35). [8] Sun protection system (1) according to the previous claim characterized by that the at least one recess (35) has a depth of 1-3 mm, particularly preferably a depth of 1 mm. [9] Sun protection system (1) according to one of the two preceding claims characterized by that the magnetic or ferromagnetic insert is introduced into the recess (35), preferably by means of a fastening means, wherein the fastening means preferably comprises an adhesive and / or a clamping element. [10] Sun protection system (1) according to one of the preceding claims 7-9 characterized bythat the magnetic insert is a permanent magnet, wherein the permanent magnet preferably comprises aluminum-nickel-cobalt, neodymium, samarium-cobalt and / or a ferrite. [11] Sun protection system (1) according to one of the preceding claims 7-9 characterized by that the ferromagnetic insert comprises a ferromagnetic material, wherein the ferromagnetic material preferably comprises a ferromagnetic metal, for example iron, nickel or cobalt, or wherein the ferromagnetic material preferably comprises a ferromagnetic alloy, for example AlNiCo, SmCo, Nd2Fe14B, Ni80Fe20 (“Permalloy”), or NiFeCo alloys (“Mumetal”). [12] Sun protection system (1) according to one of the preceding claims characterized by , that the second unit of the central locking device (33) acts as a counterpart to the first unit of the central locking device (32), wherein preferably in the case of providing at least one magnetic insert in the first unit of the central locking device (32), the second unit of the central locking device (33) comprises a ferromagnetic or magnetic plate and wherein, in the case of providing at least one ferromagnetic insert in the first unit of the central locking device (32), the second unit of the central locking device (33) comprises a magnetic plate. [13] Sun protection system (1) according to the previous claim characterized by that the ferromagnetic plate comprises a ferromagnetic material, wherein the ferromagnetic material preferably comprises a ferromagnetic metal, for example iron, nickel or cobalt, or wherein the ferromagnetic material preferably comprises a ferromagnetic alloy, for example AlNiCo, SmCo, Nd2Fe14B, Ni80Fe20 (“Permalloy”), or NiFeCo alloys (“Mumetal”). [14] Sun protection system (1) according to one of the two preceding claims characterized by that the magnetic plate is a permanent magnet, wherein the permanent magnet preferably comprises aluminum-nickel-cobalt, neodymium, samarium-cobalt and / or a ferrite. [15] Sun protection system (1) according to one of the preceding claims characterized by that the sun protection system (1) has mounting shoes (18) so that the sun protection (19) can be suspended by means of the lateral tensioning cords (16) via the mounting shoes (18), for example on a window or door frame, a wall or a window decoration.

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