Cord tensioning device and sun protection system with a cord tensioning device

Abstract

The invention relates to a cord tensioning device (20) for tensioning and deflecting a tensioning cord (102) of a sun protection system (100), comprising a spring element (24) and a receiving unit (21) on which the spring element (24) is fixed, wherein the receiving unit (21) can be at least partially inserted into a profile rail (103, 104) of the sun protection system (100) and fixed to the profile rail (103, 104), wherein the cord tensioning device (20) has at least one deflection point (30), preferably at least two deflection points (30), for deflecting the tensioning cord (102), and wherein the spring element (24) applies a tensioning force to the tensioning cord (102) so that the tensioning cord (102) is taut, in particular after fixing the receiving unit (21) within the profile rail (103, 104).Furthermore, the invention relates to a sun protection system (10) with a profile rail (103, 104), with a tension cord (102), with a sun protection curtain (101) and with a cord tensioning device (20).

Description

[0001] The invention relates to a cord tensioning device for tensioning and deflecting a tensioning cord of a sun protection system according to the preamble of claim 1. Furthermore, the invention relates to a sun protection system with at least one such cord tensioning device.

[0002] Sun protection systems, particularly blinds or pleated blinds, are known in various forms from the prior art. In these systems, the sun protection fabric, which may comprise several slats or be designed as a fabric with numerous pleats, can be held vertically slidable by tension cords. For example, the upper and lower ends of the sun protection fabric can each be attached to a profile rail, which can be moved independently of each other along the tension cords to change the size of the sun protection fabric. It has proven advantageous for the tension cords of the sun protection system to run through the system under tension. This tension allows the profile rails to be moved and ensures they remain in the desired position after movement.This adjustable size of the sunshade allows for customized sun protection as needed. Adjusting the shaded area by enlarging or reducing the size of the sunshade and sliding the profile rails is achieved along the pre-tensioned cords. To mount the tension cords, a suitable fastening device, such as a tensioning shoe with appropriate fasteners, is typically required on the frame of a window or door. From the tensioning shoe, the tension cords can be inserted into the profile rail, for example, at the end. A cord tensioner keeps each cord taut, regardless of the profile rail's position. With most sunshade systems, one cord tensioner is required for each tension cord.Furthermore, cord tensioners of this type are relatively complex to install and equip with the tensioning cord. It is also known from the prior art to close the sliding profile rails with an end cap that includes a cover plate, in order to ensure an aesthetically pleasing appearance and to protect the functional components housed within the profile rail from contamination. Thus, the end cap and cord tensioner are regularly attached at different, spaced-apart positions on the keder of a profile rail, which significantly increases the effort involved in the manufacture and installation of a sun protection system. Furthermore, the potential for errors during installation is increased, as each tensioning cord must be individually wound through its assigned cord tensioner. Manual retensioning is also necessary if required, which further increases the installation effort.Furthermore, the separate design of the cord tensioner and end cap with cover is disadvantageous, as it not only increases the assembly effort but also requires a large amount of space within the profile rail.

[0003] Based on this prior art, the object of the present invention is therefore to propose a new cord tensioning device that enables the tensioning of a tensioning cord of a sun protection system and can be integrated into a profile rail with minimal space requirements, as well as being easy to manufacture and assemble. Furthermore, the cord tensioning device should be universally adaptable, in particular to different sun protection systems, and provide an aesthetically pleasing finish to a profile rail.

[0004] This problem is solved in a surprisingly simple yet effective manner by a cord tensioning device according to independent claim 1. Furthermore, a sun protection system with a cord tensioning device according to the invention is proposed.

[0005] According to the invention, a cord tensioning device for tensioning and deflecting a tensioning cord of a sun protection system is proposed, which has a spring element and a receiving unit on which the spring element is fixed.

[0006] The cord tensioning device is characterized in that the receiving unit can be inserted, preferably pushed, into a profile rail of a sun protection system and can be fixed to the profile rail either directly or indirectly. The receiving unit can be fixed to the profile rail indirectly via a base element that can be fixed to the profile rail or via a keder that can be fixed to the profile rail. It is also conceivable that the receiving unit can be fixed directly to the profile rail, for example, by means of a snap-fit ​​connection. Furthermore, the cord tensioning device according to the invention has at least one deflection point, preferably at least two deflection points, for deflecting the tensioning cord. According to the invention, the tensioning cord is guided over the deflection point in such a way that a deflection of the tensioning cord occurs at the deflection point in the form of a change in the direction of the tensioning cord's course.It was discovered that deflecting the tension cord by 360° at a deflection point increases the frictional force to such an extent that ease of use is significantly reduced. The spring element is positioned to apply a tension force to the tension cord. This tightens the tension cord, particularly after the mounting unit is fixed within the profile rail.

[0007] Within the scope of the invention, the term "keder" relates to a stabilizing element to which a sunshade curtain of a sun protection system can be attached, so that the sunshade curtain can be held in its geometric shape and position. At the same time, the keder can serve as a cover for a profile rail of a sun protection system.

[0008] With the cord tensioning device according to the invention, the tensioning cord is spring-mounted, either indirectly, for example via a sliding element, or directly, so that the tensioning cord can be easily deflected by the spring force of the spring element, which causes tension in the tensioning cord. Thus, the tensioning cord is tensioned against the spring force of the spring element. The spring element or a spring-mounted sliding element presses against the tensioning cord, so that, advantageously, the tension of the tensioning cord is self-regulating due to the spring force of the spring element, and readjustment or readjustment is unnecessary. Advantageously, the cord tensioning device according to the invention can accommodate, deflect, and tension up to four tensioning cords. Preferably, the cord tensioning device is designed to accommodate and tension two cords.

[0009] Furthermore, the proposed cord tensioning device is easy to install, as the tensioning cord simply needs to be wrapped around the spring element or a sliding element and does not require the complex threading of a conventional cord tensioner. Additionally, the tensioning cord can be inserted into the cord tensioning device outside the profile rail, and the cord tensioning device can then be inserted into the profile rail, further reducing installation effort. If a sun protection system has multiple tensioning cords, for example, up to four, this number of cords can be tensioned using the proposed cord tensioning device without requiring at least one cord tensioner per cord, as is typically the case.However, it is also conceivable that not all tensioning cords are tensioned in a single cord tensioning device, but rather that a first number of tensioning cords are tensioned in a first cord tensioning device, and a second number of tensioning cords are guided past the first cord tensioning device and tensioned in a second cord tensioning device. Up to four cord tensioning devices can be arranged on a sun protection system, preferably forming the lateral end of two profile rails. Preferably, a sun protection system according to the invention has two or four cord tensioning devices. The number of cord tensioning devices can correspond to the number of tensioning cords of the sun protection system, or the number of tensioning cords can exceed the number of cord tensioning devices.

[0010] Within the scope of the invention, the term "tension cord" refers in particular, but by no means exclusively, to tension cords, tension bands, tension cables, tension wires, and / or tension ropes. Preferably, a tension cord is guided both through the profile rail and through openings in the sunshade fabric that are parallel to the profile rail. The tension cords serve, on the one hand, to support the sunshade fabric and, on the other hand, to ensure that the profile rails are in a horizontal position before or after operation of the sunshade system, which is preferably designed as a pleated blind system. The manner in which a tension cord is guided through the profile rail and the fabric structure is, in principle, arbitrary. Guides in C and Z shapes are known from the prior art and are also preferably used within the scope of the invention.

[0011] The tension cord is preferably guided through a labyrinthine passage by the cord tensioning device. This creates higher friction due to the frequent redirection of the cords. More preferably, the tension cord is guided through the cord tensioning device in an S-shape. This means that the tension cord is preferably redirected by 180° at least twice within the cord tensioning device. Within the scope of the invention, a redirection of 180° means that the tension cord is guided over one of the redirection points in such a way that the tension cord changes direction by approximately 180°. More preferably, the sun protection system according to the invention, which will be described in more detail elsewhere, has an even number of tension cords.

[0012] The cord tensioning device can preferably be arranged on the end face of a profile rail of a sun protection system. Preferably, the cord tensioning device can be attached to the profile rail and secured to the profile rail by means of a clamping connection and / or a snap-fit ​​connection.

[0013] Advantageous embodiments of the invention are the subject of the dependent claims. The scope of the invention also includes all combinations of at least two features disclosed in the description, the claims, and / or the figures. It is understood that the embodiments described for the cord tensioning device apply equivalently to the sun protection system according to the invention, without being specifically mentioned for the latter. In particular, it is understood that common linguistic transformations or a meaningful substitution of the respective terms within the scope of usual linguistic practice, especially the use of synonyms supported by generally accepted linguistic literature, are included in the present disclosure without being explicitly mentioned in their respective formulations.

[0014] According to an advantageous embodiment, the receiving unit can have a retaining recess for securing the spring element, wherein the spring element is bent multiple times and forms a deflection point at least at one free end for redirecting the tensioning cord. Depending on the pressure applied by the tensioning cord to the deflection point at the free end of the spring element, and thus depending on the tension force of the tensioning cord, the free end of the spring element can be moved, in particular towards the keder, so that the length of the tensioning cord is released. The spring element is preferably a wire loop. The spring element can have a plurality of deflection points, preferably two or three, over which the tensioning cord can be guided. Furthermore, the spring element can have a support surface with which the spring element can be supported on the profile rail, the keder, or the receiving unit.The support ensures the required tension of the spring element. Within the scope of the invention, the term "wire bracket" refers to a spring bent from spring wire, which is in the form of a bracket or arc with a plurality of bending points.

[0015] It has proven advantageous to have a deflection point for redirecting the tension cord at each of the two free ends of the spring element. The spring element can be fixed to the receiving unit between its free ends. If the spring element has two free ends, the cord tensioning device according to the invention can release more cord length, particularly twice the cord length, compared to an embodiment with only one free end of the spring element. The tension cord is guided over the free ends, which form a deflection point for redirecting the tension cord, in such a way that pressure is applied to the free ends of the spring element when the cord is tensioned. Preferably, the tension cord is guided in a meandering or S-shaped manner within a cord tensioning device with a spring element that has two free ends for redirecting the tension cord.The cord tensioning device can have at least three deflection points, of which at least two are formed by the free ends of the spring element and a further deflection point can be formed on the receiving unit. The spring element can be fixed to the receiving unit by means of a retaining recess into which the spring element engages, or by means of a retaining projection, for example, a bolt, which extends through the spring element. It is conceivable that a retaining projection extending through the spring element interacts with a protective channel, for example, by the protective channel being attached to the receiving unit, in particular to the retaining projection of the receiving unit. It is also conceivable that the protective channel has a retaining projection for holding the spring element, by means of which the spring element is fixed to the receiving unit between its free ends.The spring element, which has a deflection point at each of its two free ends for redirecting the tension cord, can preferably be designed as a wire loop or spring plate. Preferably, the spring element is designed as a multiply bent spring plate, in particular as a spring plate with three bends. The bent spring plate can be manufactured easily and offers a larger contact surface for the tension cord(s) than, for example, a spring wire.

[0016] It has proven advantageous to connect a protective channel to the receiving unit. The tension cord can then be guided within the protective channel, which may include a deflection point for the tension cord. Within the protective channel and the receiving unit, the tension cords can be guided in a defined and organized manner, thus significantly simplifying assembly. In particular, the connection between the receiving unit and the protective channel prevents the tension cords from jamming during assembly. Preferably, the protective channel has at least two outer walls, between which the spring element is at least partially arranged and the tension cord is at least partially guided. For example, the protective channel can be essentially U-shaped or C-shaped. Furthermore, it has been found that the receiving unit and the protective channel can be connected in a particularly simple manner by means of a positive fit.In particular, the protective channel can be slid onto the receiving unit and preferably inserted, together with the receiving unit, into a profile rail of a sun protection system. The receiving unit and protective channel can be connected, for example, by means of a tongue-and-groove connection. For instance, a tongue can be formed on the receiving unit and / or the base element, which engages in a groove of the protective channel when it is slid onto the receiving unit. It is also conceivable that the protective channel is formed integrally with the receiving unit and / or with a base element.

[0017] According to a further embodiment of the cord tensioning device, a sliding element can be guided linearly on the receiving unit, and the spring element can be supported with a first contact section on the sliding element and with a second contact section on the receiving unit. If the spring element is designed as a helical and / or cylindrical tension or compression spring, a first end of the tension or compression spring forms the first contact section supported on the sliding element, and the second end of the tension or compression spring forms the second contact section supported on the receiving unit. According to the first embodiment, the sliding element is movably guided on the receiving unit of the cord tensioning device. Due to the spring force of the spring element, the sliding element is linearly displaceable along this guide.The tension cord can be placed around the sliding element, whereby the spring force of the spring element can be transferred via the sliding element to the tension cord, thereby tensioning the tension cord.

[0018] The sliding element of the cord tensioning device is movably mounted on the receiving unit. Furthermore, at least one spring element is included for tensioning at least one tensioning cord, the sliding element being linearly displaceable against the spring force of the spring element. To tension the at least one tensioning cord, a force is applied to the tensioning cord by means of the sliding element, which is linearly displaceable against the spring force of the spring element, causing tension in the tensioning cord. In other words, the spring-loaded sliding element comes into contact with the tensioning cord, so that the tensioning cord is deflected by a certain distance by the sliding element due to the spring force of the spring element, which causes tension in the tensioning cord. Thus, the sliding element is tensioned against the tensioning cord by the spring force of the spring element.The spring-loaded sliding element presses against the tensioning cord, so that the tension of the tensioning cord is advantageously self-regulating due to the spring force of the spring element, and readjustment or readjustment is unnecessary. Preferably, the spring element is designed as a tension or compression spring, in particular as a helical and / or cylindrical tension or compression spring, wherein the sliding element is linearly displaceable along the longitudinal axis of the spring element. If the cord tensioning device has two parallel springs, one spring element can be arranged laterally to the longitudinal axis of the sliding element. However, it is also conceivable that a single spring element is arranged along, and in particular on, the longitudinal axis of the sliding element. The spring-loaded sliding element preferably has a working travel of 5 mm to 22 mm. More preferably, the sliding element has a working travel of 8 mm to 12 mm, and most preferably a working travel of 10 mm.

[0019] To tension the tension cord, it can be provided that the tension cord is at least partially wrapped around the spring element or the sliding element. At a minimum, the tension cord encompasses an end section of the sliding element, which forms a deflection point, such that the direction of the tension cord changes, preferably by 180°, at the deflection point. Thus, tension can be applied to the tension cord in a simple manner by means of the spring-loaded sliding element and its displacement in the direction or against the spring force of the spring element.

[0020] The cord tensioning device can have a base element connected to the receiving unit. The base element can be fixed to a profile rail of a sun protection system. Preferably, the base element can be fixed directly to a profile rail of a sun protection system. However, it is also conceivable that the base element can be fixed indirectly to the profile rail via the receiving unit due to its connection with the receiving unit. The receiving unit can be pivotally connected to the base element, connected to the base element by means of a snap-fit ​​connection, and / or formed integrally with the base element. According to a preferred embodiment, the receiving unit is fixed to the profile rail via the base element. That is to say,In other words, the base element is fixed to the profile rail and the receiving unit is connected to the base element, so that the receiving unit is also indirectly fixed to the profile rail via the base element.

[0021] According to an advantageous embodiment, the base element can form a cover for the lateral termination of a profile rail of a sun protection system. The base element thus forms the termination of the profile rail in the manner of an end cap. This allows the profile rail of a sun protection system to be terminated in an aesthetically pleasing manner by the base element and sealed to protect it from contamination. The cover can be slotted and / or have a recess for the passage of a tension cord. Due to the design of an end cap on the cord tensioning device, the proposed cord tensioning device eliminates the need for a bore within the profile rail, since, unlike generic designs, an end cap with a cover and a separate cord tensioner do not need to be arranged within the profile rail.This advantageous design also minimizes the variety of parts and reduces manufacturing and assembly costs.

[0022] According to a further advantageous embodiment of the cord tensioning device, the device for tensioning and deflecting a tension cord has a receiving unit comprising a pivot frame element. The pivot frame element is pivotably mounted on the base element, and the sliding element is linearly movable on the pivot frame element. To simplify the assembly of the tension cords on the cord tensioning device, the pivot frame element can thus advantageously be pivoted relative to the base element, and the sliding element is also linearly movable relative to the pivot frame element. The pivot frame element is preferably pivotable by at least 90°, and more preferably by at least 180°. The pivot axis runs through the base element perpendicular to the longitudinal axis of the base element. More preferably, the pivot axis runs perpendicular to the longitudinal axis of a spring element designed as a compression spring.The pivoting frame element of the receiving unit can have a receptacle for a spring element. Preferably, two spring elements are arranged parallel and received in the pivoting frame element. The tension cord can be guided through the pivoting frame element parallel to the longitudinal axis of the spring element. Preferably, the tension cord can be guided at least partially between or along the two parallel spring elements. Because the pivoting frame element is pivotably mounted on the base element, at least one tension cord can be easily arranged on the pivoting frame element and deflected and tensioned by pivoting the pivoting frame element. Because the sliding element is linearly movable and linearly displaceable against the spring force of the spring element, the spring force of the spring element can be transferred to the tension cord by means of the sliding element to tension the tension cord.By pivoting the swivel frame element, the desired S-shaped course of the tension cord can be easily achieved by the cord tensioning device. The spring-loaded sliding element preferably has a travel of 5 mm to 20 mm. More preferably, the sliding element has a travel of 8 mm to 12 mm, and most preferably, a travel of 10 mm. If a swivel frame element is provided, it has proven advantageous if the spring element is designed as a compression spring and has a length of 15 mm to 35 mm. More preferably, the spring element designed as a compression spring has a length of 20 mm to 30 mm, and most preferably, a length of 25 mm.

[0023] The spring element can be cylindrical and / or spiral. Preferably, the spring element is cylindrical along its entire length. The spring element can have at least one recess, preferably two. The receiving unit and / or the sliding element can engage in a recess to fix and support the spring element. Preferably, the recess is designed as a circumferential groove. The spring element can be designed as a compression spring or a tension spring. Furthermore, it is conceivable that the spring element is housed in a sleeve to protect the spring element and the tension cord. If the spring element has at least one recess for fixation and support, it can be designed without a spring eye. Omitting the spring eye eliminates the need to consider it during assembly, which significantly simplifies the process.In particular, this allows the cord tensioning device to be fully pre-assembled automatically. If the spring element has two recesses, preferably one recess forms the first contact section, which is supported on the sliding element, and a second recess forms the second contact section, which is supported on the receiving unit. Preferably, the spring element is designed as a cylindrical tension spring with two recesses, so that the spring element has two so-called trumpet ends.

[0024] For easy assembly, and especially for easy insertion of the tensioning cords into the cord tensioning device, the swivel frame element can be pivoted between an extended insertion position and a folded-in mounting position. In the extended insertion position, the swivel frame element is preferably pivoted 180° away from the base element. This means that in the extended insertion position, the spatial extent of the cord tensioning device in the direction of the longitudinal axis of the base element is increased compared to the folded-in mounting position. In the mounting position, the swivel frame element is folded in, and the sliding element can come into contact with the base element. By moving the swivel frame element from the insertion position to the mounting position after inserting the tensioning cord, the tensioning cord is deflected according to the desired S-shaped path within the cord tensioning device and is also tensioned due to the spring force of the spring element.

[0025] Within the scope of the invention, the term "insertion position" refers to the position of the pivot frame element or the sliding element in which simple insertion of the cords is possible, but the cord tensioning device may not yet be functional, in particular not yet configured to tension the tensioning cord. The term "assembly position," on the other hand, refers to the position of the pivot frame element or the sliding element in which the tensioning cord is inserted into the cord tensioning device for tensioning. That is to say, if the pivot frame element and / or sliding element are in the assembly position, the cord tensioning device is functional and can be inserted into the profile rail to tension the tensioning cord.

[0026] For ease of assembly, and in particular for easy insertion of the tensioning cords into the cord tensioning device, the sliding element can be displaceable between an insertion position and a mounting position. Preferably, the sliding element is displaceable in the direction of the base element to move from the insertion position to the mounting position.

[0027] The sliding element can be guided linearly within a recess of the receiving unit, particularly within a recess of the swivel frame element. The recess can limit the movement of the sliding element against the spring force of the spring element. Thus, the recess can serve as a stop for the sliding element, allowing it to travel a definable maximum distance and preventing it from sliding out of the swivel frame element.

[0028] In the mounting position, a snap-fit ​​connection can be formed between the base element and the pivot frame element of the mounting unit. This snap-fit ​​connection is a mechanical connection that allows the mounting unit and the base element to be connected simply by snapping them into place. A particular advantage of this snap-fit ​​connection is that it can be formed without tools, which simplifies the assembly process, especially at the installation site of a sun protection system. After moving the pivot frame element into the mounting position and securing it to the base element using the snap-fit ​​connection, the cord tensioning device can be easily inserted into a profile rail of a sun protection system. Furthermore, for space-saving and damage-free transport, it is conceivable that the pivot frame element can be moved into the mounting position and secured to the base element using the snap-fit ​​connection.Additionally or alternatively, in the mounting position, the sliding element can engage in a guide of the receiving unit. In the insertion position, the sliding element can be arranged on the receiving unit, preferably above it, such that it does not engage in the guide. By moving the sliding element towards the base element to the mounting position, it can engage in the guide of the receiving unit at a defined point and is subsequently linearly displaceable along this guide against the spring force of the spring element. Advantageously, this transition from the insertion position to the mounting position can be achieved without tools, which simplifies the assembly process, particularly at the installation site of a sun protection system.After transferring the sliding element into the mounting position and securing it to the guide of the receiving unit, the cord tensioning device can be inserted particularly easily into a profile rail of a sun protection system.

[0029] To simplify the insertion of the tension cord, the base element and / or the sliding element can have at least one insertion opening for the tension cord. The insertion opening is preferably designed as an undercut slot, allowing the tension cord to be easily inserted into the slot and held in place by the undercut. This simplifies threading the tension cord and also secures it near the base element or sliding element. Preferably, the clear width or diameter of the insertion opening is larger than the diameter of the tension cord. The insertion opening can have a clear width or diameter of at least 1 mm.

[0030] Within the scope of the invention, it has proven advantageous if the tensioning cord can be guided through the cord tensioning device in an S-shape. For this purpose, the cord tensioning device can comprise at least two deflection points. Preferably, the cord tensioning device comprises three deflection points. In particular, it is advantageous if the tensioning cord is guided through the cord tensioning device in an S-shape in the mounting position of the pivot frame element and / or in the mounting position of the sliding element.

[0031] To achieve an S-shaped guide for the tension cord through the cord tensioning device, it has proven advantageous to have a deflection point for the tension cord on the sliding element, and / or on the base element, and / or on the spring element, and / or on the receiving unit. Preferably, at least one deflection point can be formed on the sliding element, and at least one further deflection point can be formed on the base element or the receiving unit. More preferably, one deflection point is formed on the base element, another deflection point is formed on the receiving unit, and a third deflection point is formed on the sliding element. Even more preferably, the tension cord is deflected by 180° at at least one deflection point, and most preferably at two deflection points.However, it is also conceivable that the spring element has two, preferably three, deflection points. Furthermore, according to an advantageous embodiment, one deflection point can be formed on the receiving unit, and two further deflection points can be formed on the spring element.

[0032] For easy attachment of the cord tensioning device or a profile rail on which a cord tensioning device according to the invention is arranged, to a tensioning shoe fixed in a frame element of a window or door, the cord tensioning device can have a magnet and / or a magnet receptacle for a magnet. The magnet of the cord tensioning device can then exert a magnetic holding force, for example on another magnet arranged in a tensioning shoe, thereby enabling reliable magnetic retention of the cord tensioning device or a profile rail on a tensioning shoe. Preferably, the magnet can be inserted into a recess provided in the cord tensioning device. More preferably, the magnet is arranged on the base element. The magnet can be inserted into a magnet receptacle provided in the base element.The magnet receptacle, designed as a recess, is preferably designed to be complementary to the magnet and has at least one retaining rib so that the magnet can be held within the recess.

[0033] For particularly simple and secure attachment of the cord tensioning device, the base element and / or the mounting unit can be connected to a profile rail of a sun protection system by means of a clamping connection and / or a snap-fit ​​connection. The base element and / or the mounting unit can have at least one snap-fit ​​arm, preferably two. A snap-fit ​​connection with a profile rail of a sun protection system can be formed by means of the at least one snap-fit ​​arm. Preferably, the snap-fit ​​arm has snap hooks that engage in a cutout in the profile rail. Additionally or alternatively, the base element and / or the mounting unit can have a rising snap wedge to form a snap-fit ​​connection with a profile rail. The snap wedge can engage in a notch in the profile rail. Preferably, the base element and / or the mounting unit has two laterally arranged snap wedges.For example, the cord tensioning device can be inserted into the profile rail in one direction, with the locking wedge rising in the opposite direction of insertion. It is also conceivable that a locking connection is formed between the base element and the receiving unit by means of a rising locking wedge that engages in a notch. For example, the base element can be at least partially slid onto the receiving unit, with a locking wedge on the receiving unit rising in the opposite direction of insertion and engaging in a notch on the base element. It has proven advantageous if the locking or clamping connection can be released manually to prevent unwanted loosening of the connection between the profile rail and the cord tensioning device and at the same time to ensure easy opening of the connection.However, it is also conceivable, particularly to meet regulatory requirements, that a force of at least 90 N is necessary to open the latching or clamping connection.

[0034] To guide the tension cords in an orderly manner, a comb element can be included into which at least one tension cord can be inserted. The comb element has a plurality of comb teeth, between each of which a tension cord can be arranged and passed. The comb teeth are preferably spaced such that the distance between two teeth corresponds to the diameter of the tension cord or is slightly larger than the diameter of the tension cord. More preferably, the distance between two comb teeth is smaller than the diameter of two tension cords, so that it can be ensured that only one tension cord can be arranged between two comb teeth. Preferably, the comb element is designed to accommodate four tension cords, so that the comb element can have four spaces and five comb teeth. It is conceivable that the comb element is arranged on the base element and / or on the sliding element.To simplify manufacturing and assembly, and to increase the stability of the cord tensioning device, the comb element can be formed integrally with the base element and / or integrally with the sliding element of the cord tensioning device.

[0035] In a second aspect, the invention relates to a sun protection system comprising at least one profile rail, a tension cord, a sun protection curtain and at least one cord tensioning device, as described elsewhere.

[0036] The sun protection system can have at least one profile rail, preferably a top rail and a bottom rail, with the adjustable sunshade fabric arranged on the profile rail. Preferably, the sunshade fabric is arranged between the top rail and the bottom rail. The profile rails can be arranged to be freely displaceable from one another in the vertical direction on the tension cords. The sunshade fabric and the profile rail can be mounted, for example, on at least one tension cord, such that the profile rail can be displaced by a force exerted by the user. It is also conceivable that the profile rail is fixed in its position when unloaded, i.e., without force being exerted by a user.The profile rail designed as the bottom rail is preferably arranged vertically below the sunshade, and the profile rail designed as the top rail is preferably arranged vertically above the sunshade. This means that the sunshade is arranged between the top rail and the bottom rail, whereby the top rail and the bottom rail can be freely or guidedly displaceable transversely to their longitudinal extent, particularly in the vertical direction.

[0037] Within the scope of the invention, it is conceivable that the sun protection system is designed in the manner of a Venetian blind or a pleated blind. A sun protection system designed in the manner of a Venetian blind can have a sunshade fabric with a plurality of parallel sun protection elements arranged as slats. A sun protection system designed in the manner of a pleated blind can have a sunshade fabric with a plurality of parallel pleats, wherein, within the scope of the invention, each pleat forms a sun protection element of the sunshade fabric. The tension cord preferably runs from the bottom rail through the sunshade fabric to the top rail. Preferably, the tension cord can be attached to a frame of a window or door opening, which is to be covered or shaded by the sun protection system.

[0038] The profile rails are preferably closed laterally by cord tensioning devices; in other words, a cord tensioning device is arranged at each longitudinal end of the profile rail. The cord tensioning device can be inserted or pushed into the profile rail. Furthermore, a snap-fit ​​connection can be formed between the cord tensioning device and the profile rail to secure the cord tensioning device within the profile rail. According to a preferred embodiment of the sun protection system, the sun protection system has two profile rails, one serving as the upper rail and the other as the lower rail. Furthermore, according to this embodiment, the sun protection system comprises four cord tensioning devices, each arranged at one end of the profile rails.The at least one tension cord runs through the sunshade fabric, the profile rails, and the cord tensioning device, with the tension cord being deflected, preferably multiple times, within the cord tensioning device. The tension cords serve, on the one hand, to support the fabric and, on the other hand, to ensure that the bottom rails are in a vertical position before or after the profile rails are actuated. The way in which a tension cord is guided through the profile rails and the fabric is, in principle, arbitrary. Guides in C and Z shapes are known from the prior art and are also preferred within the scope of the invention. For securing the tension cord, it has been found advantageous to arrange a fastening device, which may, for example, include a tensioning shoe and / or a retaining element, above and / or below the profile rails.The mounting device can be fixed to the window or door frame. Additionally or alternatively, the mounting device can be attached to a side profile, provided the sun protection system has a side profile. The mounting device allows the tension cords to be easily held and, in combination with the cord tensioning device according to the invention, tensioned.

[0039] According to an advantageous embodiment, the tension cord enters the end face of the cord tensioning device and thus also the profile rail, is deflected within the cord tensioning device, and then exits the profile rail in the direction of the sunshade. After exiting the first profile rail, which is designed, for example, as the bottom rail, the tension cord continues through the sunshade and enters another profile rail, which is designed, for example, as the top rail. At the entry point, it is deflected towards a cord tensioning device of the profile rail and, after at least one further deflection within the cord tensioning device, exits the profile rail again at its end face. After exiting the profile rail at its end face, or before entering the profile rail at its end face via the cord tensioning device, the tension cord can be guided to at least one fastening device and secured thereto.

[0040] It is conceivable that the sunshade fabric of the sun protection system is attached to a keder (seam). The keder can be a cover strip of a profile rail and is inserted into it. It is conceivable that the tension cord enters and exits the profile rail through an opening in the keder, which may be a circular recess. The keder can be made of a metal strip, which makes it particularly stable and durable, while also ensuring a high-quality and visually appealing finish to the profile rail. The opening in the keder can advantageously be reinforced by an eyelet that surrounds it. The eyelet can be simply pressed into the base of the keder and / or formed by shaping the base of the keder in the area of ​​the opening.

[0041] It is understood that the aforementioned and subsequently explained embodiments and exemplary embodiments can be implemented not only individually, but also in any combination with one another, without departing from the scope of the present invention. It is also understood that the aforementioned and subsequently explained embodiments and exemplary embodiments relate in an equivalent or at least similar manner to the sun protection system according to the invention, without being specifically named for it.

[0042] Embodiments of the invention are shown schematically in the drawings and are explained below by way of example.

[0043] They show: Fig. 1 a first embodiment of a cord tensioning device according to the invention in mounting position in isometric view from above; Fig. 2the cord tensioning device according to the invention in an unfolded insertion position in an isometric view from above; Fig. 3 the cord tensioning device according to Fig. 1 in folded mounting position in isometric view from below; Fig. 4 the cord tensioning device according to Fig. 1 in unfolded insertion position in isometric view from below; Fig. 5 the cord tensioning device according to Fig. 1 in folded mounting position, viewed from below; Fig. 6 the section view according to section line AA from Fig. 5 ; Fig. 7 the cord tensioning device according to Fig. 1 in unfolded insertion position, viewed from below; Fig. 8 the cord tensioning device according to Fig. 1 in unfolded insertion position in top view; Fig. 9 The cord tensioning device in its unfolded insertion position in sectional view along section line BB. Fig. 8 ; Fig. 10 the cord tensioning device according to Fig. 1in mounting position in isometric view from above; Fig. 11 the cord tensioning device according to Fig. 1 in folded mounting position together with a keder in isometric view from below; Fig. 12 a second embodiment of a cord tensioning device with tensioning cords inserted therein in an isometric view from above; Fig. 13 the cord tensioning device according to Fig. 12 in isometric view from above; Fig. 14 the cord tensioning device according to Fig. 12 in isometric view from below; Fig. 15 the cord tensioning device according to Fig. 12 View from above; Fig. 16 a sectional view of the cord tensioning device according to Fig. 12 along the intersection line AA from Fig. 15 ; Fig. 17 a sun protection system according to the invention; Fig. 18 a third embodiment of a cord tensioning device with a tensioning cord inserted therein in isometric view; Fig. 19a sectional view of the cord tensioning device according to Fig. 18 ; Fig. 20 a fourth embodiment of a cord tensioning device with a tensioning cord inserted therein in isometric view; Fig. 21 a sectional view of the cord tensioning device according to Fig. 20 ; Fig. 22 a fifth embodiment of a cord tensioning device with a tensioning cord inserted therein in isometric view; Fig. 23 a sectional view of the cord tensioning device according to the fifth embodiment; Fig. 24 a sixth embodiment of a cord tensioning device in isometric view; Fig. 25 the sixth embodiment of a cord tensioning device with tensioning cord and base element inserted therein in isometric view; Fig. 26 a sectional view of the cord tensioning device according to Fig. 25 ; Fig. 27 a seventh embodiment of a cord tensioning device in isometric view; and Fig. 28a sectional view of the cord tensioning device according to Fig. 27 .

[0044] The Figures 1 to 11 Figure 1 shows, in combination, a first embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 comprises a base element 23 and a receiving unit 21 for tensioning and deflecting a tensioning cord 102 of a sun protection system 100 (not shown here). The base element 23 forms the cover 35 for the lateral termination of a profile rail 103, 104. The cord tensioning device 20, within which the tensioning cord 102 is deflected for tensioning, comprises a sliding element 22 and a receiving unit 21, which is designed as a pivot frame element 27. The pivot frame element 27 is pivotably arranged on the base element 23, and the sliding element 22 is linearly movable within the pivot frame element 27.

[0045] The Figures 1 and 3Figure 1 shows the cord tensioning device 20 with the swivel frame element 27 in a folded-in mounting position. In the folded-in mounting position, the swivel frame element 27 is folded in, and the sliding element 22 comes to rest against the base element 23. In contrast, the figures show Figures 2 and 4 as well as 7 to 9 The swivel frame element 27 in the insertion position, in which the swivel frame element 27 is swivelled away from the base element 23 by 180°. It is from a combination of the Figures 1 to 9 It is clearly evident that in the unfolded insertion position, the spatial extent of the cord tensioning device 20 in the direction of the longitudinal axis L of the base element 23 is increased compared to the folded mounting position. Furthermore, it is evident from a comparison of the figures that the base element 23 has an insertion opening 29 through which the tensioning cords 102 can be inserted into and removed from the cord tensioning device 20.

[0046] Especially from Figure 2 , As the cord tensioning device 20 is shown in the insertion position, it is evident that the tensioning cords 102, after being inserted into the cord tensioning device 20, are guided further towards the pivot frame element 27 via the insertion opening 29. Starting from the insertion opening 29, the tensioning cords 102, with respect to the Figure 2 The illustration shows the tension cords 102 passing below the pivot axis S of the pivot frame element 27 and then through the sliding element 22, which is received in the pivot frame element 27. By folding in the pivot frame element 27, the tension cords 102 can be deflected multiple times within the cord tensioning device 20. This multiple deflection, which causes the tension cords 102 to follow an S-shaped course within the cord tensioning device 20, is particularly evident from the fact that the tension cords 102 are guided ... Fig. 6The cross-sectional view of the cord tensioning device 20 shows it in its folded-in mounting position. To achieve this S-shaped profile, the cord tensioning device 20 has two deflection points 30a and 30b, at which the tensioning cords 102 are deflected by 180°. Deflection point 30a is located on the sliding element 22, and deflection point 30b is located on the base element 23 of the cord tensioning device 20. It is also evident that another deflection point 30c is located on the base element 23 in the area of ​​the insertion opening 29, at which the tensioning cords 102 are deflected by 90°. Deflection point 30b on the base element 23 is located in the area of ​​the pivot bearing or is formed by the pivot bearing, by means of which the pivot frame element 27 is pivotally mounted on the base element 23. For the orderly introduction or execution of the tension cords 102 from the cord tensioning device 20, a comb element 25 is arranged on the base element 23 in the area of ​​the insertion opening 29.A tension cord 102 can be inserted between each pair of tines of the comb element 25 and thus be inserted unhindered into the cord tensioning device 20 without getting caught or stuck.

[0047] The sliding element 22 is spring-mounted within the pivot frame element 27 and guided linearly within the pivot frame element 27 against the spring force of the two spring elements 24. Due to the passage of the tension cords 102 through the sliding element 22 and the pressure exerted on the sliding element 22 by the spring elements 24, tension can be applied to the tension cords 102. The sliding element 22 is guided linearly within the recess 28 of the pivot frame element 27, such that the recess 28 limits the movement of the sliding element 22 against the spring force of the spring element 24 within the recess 28. In other words, the sliding element 22 can only be moved linearly within the recess 28 of the pivot frame element 27 until it reaches the end of the recess 28. Thus, the recess 28 can serve as a stop for the sliding element 22. Furthermore, a summary of the Figures 1 to 11, especially the Figures 1 to 4 , 10 and 11 It can be seen that locking arms 31 are arranged on the base element 23. The two locking arms 31 are arranged laterally to the side of the pivot frame element 27 in the insertion position. The locking lugs of the locking arms 31 can engage in a locking recess of a profile rail 103, 104 (not shown here) to form a locking connection between the profile rail 103, 104 and the cord tensioning device 20 after the cord tensioning device 20 has been inserted into the profile rail 103, 104.

[0048] To secure the cord tensioning device 20, together with a profile rail 103, 104 into which the cord tensioning device 20 can be inserted, to a door or window frame, the cord tensioning device 20, according to the first embodiment, has a magnetic receptacle 32 for receiving a magnet 26. The magnet 26 allows a magnetic connection to be established between a fastening device 105, which can be attached to the frame of a window or door opening, and the cord tensioning device 20. The magnetic receptacle 32 is designed according to the Figures 2 and 8The base element 23 is designed as a circular cylindrical recess for receiving a circular cylindrical magnet 26. The magnet 26 can be easily inserted from below into the magnet receptacle 32, which is integrated into the base element 23. Retaining ribs can be arranged within the magnet receptacle 32 to secure the magnet 26, so that the magnet 26 is held in place by the retaining ribs within the magnet receptacle 32.

[0049] The Figures 12 to 16Figure 1 shows a second embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 according to the second embodiment also has a receiving unit 21, a base element 23, and a sliding element 22, wherein the receiving unit 21 is formed integrally with the base element 23. The base element 23 is designed in the form of an end cap and has a cover 35 which, after insertion of the cord tensioning device 20, as already described in the first embodiment, provides a secure and visually appealing closure for a profile rail 103, 104, which is located in the Figures 12 to 16 Not shown, this is possible. The sliding element 22 is spring-mounted on the receiving unit 21 and is linearly displaceable against the spring force of the two spring elements 24 relative to the receiving unit 21 and the base element 23. A deflection point 30a is provided on the sliding element 22, as shown in particular from Figure 12The sliding element 22 is designed to deflect the tension cords 102 by 90°. A comb element 25 is arranged on the sliding element 22 for the orderly guidance of the tension cords 102, with the sliding element 22 and the comb element 25 being formed in one piece. A tension cord 102 can be inserted between each pair of teeth of the comb element 25, and it is evident that, according to the Figures 12 to 16 In the embodiment shown, up to four tension cords 102 can be inserted into the comb element 25. For easy insertion of the tension cord 102, the base element 23 has an insertion opening 29 through which the tension cords 102, in this case two tension cords 102, are inserted at their ends into the cord tensioning device 20 and thus also into the profile rails 103, 104, which are located in the Figures 12 to 16which are not shown, can be inserted. In the area of ​​the insertion opening 29, the tension cords 102 are deflected by 90° at the deflection point 30a, which is formed by the sliding element 22. From the deflection point 30a, the tension cords 102 continue along the longitudinal extent of the sliding element 22 to the comb element 25, which is arranged on the upper side of the sliding element 22, and then exit the cord tensioning device 20. After leaving the cord tensioning device 20, the tension cords 102 continue in the further course, which consists of the Figures 12 to 16 It is not apparent from the profile rail 104, whereby a further deflection of the tension cords by 90° can occur at the exit from the profile rail 104. Because the sliding element 22 is spring-mounted at one end and has the deflection point 30a for the tension cords 102 at the other end, the spring elements 24 exert a tension pressure on the tension cords 102. As can be seen in particular from the Figure 16As can be seen in the sectional view shown, a contact section 33 for the two spring elements 24 is formed on the receiving unit 21 at the end of the cord tensioning device 20 opposite the aperture 35. A further contact section 34 for the spring elements 24, designed in the form of a downwardly projecting rib, is arranged on the sliding element 22, so that the two spring elements 24 are received between the two contact sections 33 and 34. Furthermore, the base element 23 of the cord tensioning device 20, according to the second embodiment, also has a magnet receptacle 32 for receiving a magnet 26. By combining the aperture 35, which is formed by the base element 23 of the cord tensioning device 20, and the cord tensioning device 20 with sliding element 22 and receiving unit 21, considerable installation space can be saved compared to a separate design of the cord tensioning device and the end cap with aperture.

[0050] Figure 17Figure 1 shows the basic structure of a pleated sun protection system 100 according to the invention, comprising a pleated sun protection curtain 101. A profile rail 103, designed as a top rail, is provided at the upper end of the sun protection curtain 101, and a profile rail 104, designed as a bottom rail, is provided at the lower end of the sun protection curtain 101. The top rail 103 and the bottom rail 104 are aligned parallel to the pleats of the sun protection curtain 101. The profile rail 103 and the profile rail 104 are displaceable transversely to their longitudinal extent during operation of the sun protection system 100. A handle 106 is attached to each of the profile rails 103 and 104 for easy operation. According to the illustrated embodiment, the profile rail 103 and the profile rail 104 can be moved due to the guidance along the tension cords 102 emerging laterally from the profile rails 103, 104.Furthermore, the tension cords 102 can be used to return the profile rails 103, 104 to a straight position, i.e. predominantly a horizontal position, after the sun protection system 100 has been activated, and the sun protection curtain 101 can be supported. The tension cords 102 can be held on a fastening device 105 designed as a tension shoe and run through the profile rail 104 designed as a bottom rail, exit the bottom rail 104 through an opening in the profile rail 104, in particular through a passage 11 of the keder 10, in the direction of the sunshade 101, continue through the openings arranged in the sunshade 101 in the direction of the profile rail 103 designed as a top rail, enter the profile rail 103 through an opening in the profile rail 103, in particular through a passage 11 of the keder 10 of the profile rail 103 and run inside the top rail to a further cord tensioning device 20.After passing through the cord tensioning device 20, in which the tensioning cords 102 undergo at least one, preferably multiple, deflection, the tensioning cords 102 exit the profile rail 103 at the end face and run to a further fastening device 105 designed as a tensioning shoe. Figure 17 It is evident that the sun protection system 100 has a total of four cord tensioning devices 20, each cord tensioning device 20 closing off an end face of the profile rails 103, 104. Thus, the cord tensioning device 20 according to the invention can not only securely and attractively close off the end faces of the profile rails 103, 104, but also simultaneously tension the tensioning cords 102 by means of guidance via a spring-loaded sliding element 22.

[0051] The Figures 18 and 19Figure 1 shows a third embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 according to the third embodiment has a base element 23 and a receiving unit 21 with a spring element 24. After insertion of the cord tensioning device 20, as already described in the first embodiment, the base element 23 forms a cover 35 for a secure and visually appealing closure of a profile rail 103, 104, which is located in the Figures 18 and 19 not shown. The recording unit 21 is formed integrally with the base element 23, wherein the recording unit 21 is in Figs. 18 and 19 The figure is shown as a dotted line. The spring element over which the tension cord 102 is guided has three deflection points 30a, 30b, 30c, as can be seen in particular from the diagram. Figure 19The base element 23 is designed to redirect the tension cord 102. For easy insertion of the tension cord 102, the base element 23 has an insertion opening 29 through which the tension cord 102 can be inserted into the cord tensioning device 20 and thus also into the profile rails 103, 104, which are located in the Figures 18 and 19 which are not shown, can be introduced.

[0052] Especially from Figure 19 It is evident that the tension cord 102, after being inserted into the cord tensioning device 20, is guided further towards the spring element 24 via the insertion opening 29. Starting from the insertion opening 29, the tension cord 102, with respect to the Figure 19 The illustration shows the tension cord 102 passing below the base element 23 and then through the spring element 24, which is designed as a wire loop. The multiple deflections, which cause the tension cord 102 to assume an S-shaped course within the cord tensioning device 20, are particularly evident from the... Fig. 19The sectional view of the cord tensioning device 20 shows the following: To achieve this S-shaped profile, the spring element 24 has three deflection points 30a, 30b, and 30c, at which the tensioning cord 102 is deflected. It is also evident that in the area of ​​the insertion opening 29, another deflection point 30d is formed on the base element 23, at which the tensioning cord 102 is deflected by 90°. The tensioning cord 102 is thus inserted into the cord tensioning device 20 via the insertion opening, guided over the deflection points 30a-d, and, after passing deflection point 30a, exits the section formed by the Figures 18 and 19 which is not apparent, from the keder 10 of the profile rail, whereby a further deflection of the tension cord by 90° can take place at the exit from the profile rail.

[0053] Because the tension cord is guided over the spring element 24, the spring element 24, particularly at its free end 43, exerts a tension pressure on the tension cord 102. The receiving unit 21 has a retaining recess 40 into which the spring element 24 is hooked, thus securing the spring element 24 to the receiving unit 21. Furthermore, the spring element 24 can be supported on the keder 10 by a support surface 42.

[0054] To fix the cord tensioning device 20, together with a profile rail 103, 104 into which the cord tensioning device 20 can be inserted, to a door or window frame, the cord tensioning device 20, according to the third embodiment, has a magnetic receptacle 32 for receiving a magnet inserted into the Figs. 18 and 19The magnet 26 (not shown) is used to create a magnetic connection between a fastening device 105, which can be attached to the frame of a window or door opening, and the cord tensioning device 20. To fix the magnet 26, retaining ribs can be arranged within the magnet receptacle 32, which is preferably cylindrical, so that the magnet 26 is held within the receptacle 32 by the retaining ribs. By combining the cover plate 35, which is formed by the base element 23, and the cord tensioning device 20 with spring element 24, considerable installation space can be saved and the number of parts minimized compared to separate designs of the cord tensioning device and end cap with cover plate.

[0055] The Figures 20 and 21Figure 1 shows a fourth embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 according to the fourth embodiment has a base element 23 and a receiving unit 21 with a spring element 24. After the cord tensioning device 20 is inserted into a profile rail, as already described in the first embodiment, the base element 23 forms a cover 35 for a secure and visually appealing closure of a profile rail 103, 104, which is located in the Figures 20 and 21 not shown. The recording unit 21 is formed integrally with the base element 23, wherein the recording unit 21 is in Figs. 20 and 21The spring element 24 is shown as a dotted line. It is indirectly fixed to the receiving unit 21 via the protective channel 39, which is positively connected to the receiving unit 21. The cord guide can be protected, at least partially, within the protective channel 39 and the receiving unit 21. Furthermore, the spring element 24 is at least partially received within the protective channel 39. To secure the spring element 24, the protective channel 39 has a retaining recess 40 into which the spring element 24 engages. According to the illustrated embodiment, the protective channel 39 can be slid onto the receiving unit 21, with a groove in the protective channel 39 receiving a spring in the receiving unit 21 to form a tongue-and-groove connection. It is also conceivable that the protective channel 39 can be partially slid onto the base element 23 and / or secured to the base element 23 with a snap-fit ​​connection.

[0056] The spring element 24, over which the tension cord 102 is guided, has four deflection points 30a, 30b, 30b', 30c, as can be seen in particular from Figure 21 The base element 23 is designed to redirect the tension cord 102. For easy insertion of the tension cord 102, the base element 23 has an insertion opening 29 through which the tension cord 102 can be inserted into the cord tensioning device 20 and thus also into the profile rails 103, 104, which are located in the Figures 20 and 21 which are not shown, can be introduced. In particular from Figure 21 It is evident that the tension cord 102, after being inserted into the cord tensioning device 20, is guided further towards the spring element 24 via the insertion opening 29. Starting from the insertion opening 29, the tension cord 102, with respect to the Figure 21The illustration shows the tension cord 102 passing below the base element 23 and then over the spring element 24, which is designed as a wire loop. The multiple deflections, which cause the tension cord 102 to assume an S-shaped course within the cord tensioning device 20, are particularly evident from the... Fig. 21The sectional view of the cord tensioning device 20 shows the following: To achieve this S-shaped profile, the spring element 24 has deflection points 30a and 30c, and the receiving unit 21 has deflection points 30b and 30b', at which the tensioning cord 102 is deflected. It is further evident that another deflection point 30d is formed on the base element 23 in the area of ​​the insertion opening 29, at which the tensioning cord 102 is deflected. A further deflection point 30e can be provided between deflection point 30d and deflection point 30c, but this only causes a slight deflection of the tensioning cord 102, the deflection at deflection point 30e being less than 45° from the vertical in the illustration shown. The tension cord 102 is thus inserted into the cord tensioning device 20 via the insertion opening, guided at least over the deflection points 30a-d, and, after passing the deflection point 30a, emerges from the Figures 20 and 21which is not apparent, from the keder 10 of the profile rail, whereby a further deflection of the tension cord by 90° can take place at the exit from the profile rail.

[0057] Because the tension cord is guided over the spring element 24, the spring element 24, particularly via its two free ends 43, exerts a tension pressure on the tension cord 102. The receiving unit 21, which is designed as a retaining arm projecting away from the base element 23, has a retaining recess 40 in which the spring element 24 is hooked, thus fixing the spring element 24 to the receiving unit 21. In addition, the spring element 24 can be supported on the keder 10 by a support surface 42.

[0058] To fix the cord tensioning device 20, together with a profile rail 103, 104 into which the cord tensioning device 20 can be inserted, to a door or window frame, the cord tensioning device 20 also has, according to a third embodiment, a magnetic receptacle 32 for receiving a magnet inserted into the Figs. 18 and 19The magnet 26 (not shown) is used to create a magnetic connection between a fastening device 105, which can be attached to the frame of a window or door opening, and the cord tensioning device 20. To fix the magnet 26, retaining ribs can be arranged within the magnet receptacle 32, which is preferably cylindrical, so that the magnet 26 is held within the receptacle 32 by the retaining ribs. The combination of the cover plate 35, formed by the base element 23, and the cord tensioning device 20 with spring element 24 and protective channel 39 allows for significant space savings compared to separate designs of the cord tensioning device and end cap with cover plate, and ensures reliable and secure assembly.

[0059] The Figures 22 and 23 show a fifth embodiment of a cord tensioning device 20 according to the invention. The illustrations in the Figures 22 and 23The cord tensioning device 20 shown largely corresponds to that shown in the Figures 20 and 21 Therefore, to avoid repetition, reference is made to the corresponding description. The cord tensioning device 20 according to the fifth embodiment differs from the cord tensioning device 20 according to the fourth embodiment in that the spring element 24 is designed as a spring plate instead of a wire clip and is fixed to the receiving unit 21 by means of a retaining projection 41 of the protective channel 39. To fix the spring element 24, the protective channel 39, which is located in Figure 22 Not shown, the unit has a retaining projection 41 that extends through the spring element 24. Furthermore, the receiving unit 21 only has deflection points 30b, 30e, 30f and not, as provided in the fourth embodiment, a deflection point 30b'. In particular, Figure 23It is evident that the tension cord 102, after being inserted into the cord tensioning device 20, is guided further towards the spring element 24 via the insertion opening 29. Starting from the insertion opening 29, the tension cord 102, with respect to the Figure 23 The illustration shows the tension cord 102 passing below the base element 23 and then over the spring element 24, which is designed as a spring plate. The multiple deflections, which cause the tension cord 102 to assume an S-shaped course within the cord tensioning device 20, are particularly evident from the... Fig. 23The sectional view of the cord tensioning device 20 shows the following: To achieve this S-shaped profile, the spring element 24 has deflection points 30a and 30c, and the receiving unit 21 has deflection points 30b, 30e, and 30f, at which the tensioning cord 102 is deflected. The tensioning cord 102 is thus inserted into the cord tensioning device 20 via the insertion opening 29, guided at least over the deflection points 30a-d, and, after passing the deflection points 30a and 30f, enters the section formed by the Figures 22 and 23It is not apparent from the keder 10 of the profile rail, whereby a further deflection of the tension cord by 90° can occur at the exit from the profile rail. According to the fifth embodiment, a further deflection point 30e can be provided between the deflection point 30d and the deflection point 30c, and a deflection point 30f can be provided further along after the deflection point 30a, so that the tension cord is guided from the insertion opening 29 via the deflection points 30d, 30e, 30c, 30b, 30a and 30f and then exits the cord tensioning device 20. According to the fifth embodiment, the spring element 24 can be at least partially located between two opposing side walls 44 of the receiving unit 21, which are in the Figures 22 and 23 The dotted line represents the area to be recorded.

[0060] The Figures 24 to 26The figures together show a sixth embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 comprises a receiving unit 21, a spring element 24, and a sliding element 22 for tensioning and deflecting a tensioning cord 102 of a sun protection system 100 (not shown here). The sliding element 22 is arranged to be linearly movable on the receiving unit 21, wherein the receiving unit 21 is Figs. 24 to 26 The diagram is shown with dotted lines. In particular, the sliding element 22 can be moved linearly along lateral guides 45 of the receiving unit 21 in the manner of a slide. Figures 24 to 26Figure 1 shows the cord tensioning device 20 with the sliding element 22 in the mounting position. In the mounting position, the sliding element 22 is engaged in the guides 45 of the receiving unit 21. In the insertion position (not shown here), the sliding element 22 is not engaged in the guides 45 of the receiving unit 21 to facilitate the insertion of the tensioning cord 102.

[0061] The Figures 25 and 26 Figure 1 shows the cord tensioning device 20 with a base element 23 slid onto the receiving unit 21. The base element 23 forms the cover 35 for the lateral termination of a profile rail 103, 104 (not shown here). In particular, from Figure 26 It is evident that the tension cord 102, after being inserted into the cord tensioning device 20, is guided further towards the receiving unit 21 via the insertion opening 29. Starting from the insertion opening 29, the tension cord 102, with respect to the Figure 26The illustration shows the cord being guided below the base element 23 and then through the sliding element 22, which is mounted on the receiving unit 21, and being deflected several times within the cord tensioning device. This multiple deflection, which causes the tensioning cord 102 to assume an S-shaped course within the cord tensioning device 20, is particularly evident from the Fig. 26The cross-sectional view of the cord tensioning device 20 shows the following. To achieve this S-shaped profile, the cord tensioning device 20 has two deflection points 30a and 30b, at which the tensioning cord 102 is deflected by 180°. Deflection point 30a is formed on the sliding element 22, and deflection point 30b is formed on the receiving unit 21 of the cord tensioning device 20. It is also evident that another deflection point 30d is formed on the base element 23 in the area of ​​the insertion opening 29, at which the tensioning cord 102 is deflected. Deflection point 30b on the receiving unit 21 is formed in the area of ​​the end of the receiving unit 21 furthest from the aperture 35. The sliding element 22 is spring-mounted on the receiving unit 21 and guided to move linearly against the spring force of the spring element 24, which is preferably designed as a tension spring.Due to the passage of the tension cord 102 through the sliding element 22 and the force applied to the sliding element 22 by the spring element 24, tension can be achieved on the tension cord 102.

[0062] Furthermore, a summary of the Figures 24 to 26It can be seen that locking wedges 36 are arranged on the receiving unit 21. The two locking wedges 36 are arranged laterally on the receiving unit 21 and can each engage in a recess 37 of the base element 23 to form a locking connection between the base element 23 and the receiving unit 21 after the receiving unit 21 has been slid onto the base element 23. Furthermore, a positioning rib 46 is arranged laterally on each side of the receiving unit 21, which can interact with internal longitudinal ribs of a profile rail to simplify the insertion of the cord tensioning device 20 into the profile rail. The positioning rib 46 can have a ramp for further improved guidance during the insertion of the cord tensioning device 20.The spring element 24 is cylindrical and has two recesses 38 for securing the spring element 24 on one side to an undercut of the sliding element 22 and on the other side to an undercut of the receiving unit 21, wherein a first recess 38 forms the first contact section of the spring element 24, which is supported on the sliding element 22, and a second recess 38 forms the second contact section, which is supported on the receiving unit 21.

[0063] To secure the cord tensioning device 20, together with a profile rail 103, 104 into which the cord tensioning device 20 can be inserted, to a door or window frame, the cord tensioning device 20 can have a magnetic receptacle 32 for receiving a magnet 26. The magnet 26 establishes a magnetic connection between a fastening device 105, which can be attached to the frame of a window or door opening, and the cord tensioning device 20. The magnet 26 can be easily inserted into the magnetic receptacle 32, which is integrated into the base element 23. Retaining ribs can be arranged within the magnetic receptacle 32 to secure the magnet 26, holding it in place.

[0064] The Figures 27 and 28Figure 1 shows, taken together, a seventh embodiment of a cord tensioning device 20 according to the invention. The cord tensioning device 20 comprises a receiving unit 21, a spring element 24, and a sliding element 22 for tensioning and deflecting a tensioning cord 102 of a sun protection system 100 (not shown here). The sliding element 22 is linearly movable and fixed to the receiving unit 21 by means of the spring element 24. In particular, a first end of the spring element 24 is mounted on the sliding element 22, and the other end of the spring element 24 is mounted on the receiving unit 21. Preferably, the sliding element 22 is guided and movable within the receiving unit 21.

[0065] The Figures 27 and 28 Figure 1 shows the cord tensioning device 20 with a base element 23 manufactured in one piece with the receiving unit 21, wherein the receiving unit 21 is in Figs. 27 and 28The base element 23 forms the cover 35 for the lateral termination of a profile rail 103, 104 (not shown here). Furthermore, the cover 35 can have a recessed grip 47, which can be designed to complement a recessed grip on the profile rail 103, 104 (not shown here). In particular, from Figure 28 It is evident that the tension cord 102, after being inserted into the cord tensioning device 20, is guided through the insertion opening 29a into the receiving unit 21. Starting from the insertion opening 29 and the deflection point 30a, the tension cord 102 is guided around the sliding element 22, which is received in the receiving unit 21, and then guided out of the receiving unit 21 again via the deflection point 30c. The tension cord is deflected multiple times by means of the deflection points 30a, 30b, 30c, 30d, this multiple deflection being particularly due to the Fig. 28The section view of the cord tensioning device 20 shows the following: For deflecting the tensioning cord 102, the sliding element 22 has a deflection point 30b, at which the tensioning cord 102 is deflected by 180°. It is further evident that two additional deflection points 30a and 30c are formed in the area of ​​the insertion opening 29a, at which the tensioning cord 102 is deflected. The deflection point 30d is formed in the area of ​​the insertion opening 29b, whereby the tensioning cord 102, after passing the deflection points 30a, 30b and 30c and after being led out of the receiving unit 21, is inserted via deflection point 30d into a profile rail 103, 104 (not shown here). The sliding element 22 is spring-mounted and connected to the receiving unit 21 and is guided in a linearly movable manner against the spring force of the spring element 24, which is preferably designed as a tension spring with recesses 38.By wrapping the tension cord 102 around the sliding element 22 and applying force to the sliding element 22 by the spring element 24, tension can be achieved on the tension cord 102. The spring element 24 is cylindrical and has two recesses 38 for securing the spring element 24, one on an undercut of the sliding element 22 and the other on an undercut of the receiving unit 21. A first recess 38 of the spring element 24 forms the first contact section of the spring element 24, which is supported on the sliding element 22, and a second recess 38 of the spring element 24 forms the second contact section, which is supported on the receiving unit 21.

[0066] To secure the cord tensioning device 20, together with a profile rail 103, 104 into which the cord tensioning device 20 can be inserted, to a door or window frame, the cord tensioning device 20 can have a magnetic receptacle 32 for receiving a magnet 26. A magnetic connection can be established between a fastening device 105, which can be attached to the frame of a window or door opening, and the cord tensioning device 20 using the magnet 26 (not shown here). Retaining ribs can be arranged within the magnetic receptacle 32 to secure the magnet 26, so that the magnet 26 is held within the magnetic receptacle 32 by the retaining ribs. Reference symbol list

[0067] 10 Keder 11 Keder passage 12 Eyelet 20 Cord tensioning device 21 Mounting unit 22 Sliding element 23 Base element 24 Spring element 25 Comb element 26 Magnet 27 Swivel frame element 28 Recess in swivel frame element 29 Insertion opening 30a Deflection point 30b Deflection point 30c Deflection point 30d Deflection point 30e Deflection point 30f Deflection point 31 Locking arm 32 Magnet mount 33 Spring element mounting section 34 Spring element mounting section 35 Cover plate 36 Locking wedge 37 Base element notch 38 Spring element recess 39 Protective channel 40 Retaining recess 41 Retaining projection 42 Spring element support surface 43 Free end of spring element 44 Side wall 45 Guide for sliding element 46 Positioning bar 47 Recessed grip 100 Sun protection system 101 Sun protection curtain 102 Tension cord 103 Profile rail, top rail 104 Profile rail, bottom rail 105 Fastening device 106 Handle Longitudinal axis, base element, swivel axis

Claims

1. Cord tensioning device (20) for tensioning and deflecting a tensioning cord (102) of a sun protection system (100) comprising a spring element (24) and a receiving unit (21) to which the spring element (24) is attached, characterized by that the receiving unit (21) can be at least partially inserted into a profile rail (103, 104) of the sun protection system (100) and fixed to the profile rail (103, 104), wherein the cord tensioning device (20) has at least one deflection point (30), preferably at least two deflection points (30), for deflecting the tensioning cord (102), and wherein the spring element (24) applies a tension force to the tensioning cord (102) so that the tensioning cord (102) is taut, in particular after fixing the receiving unit (21) within the profile rail (103, 104).

2. Cord tensioning device according to claim 1, characterized by thatthe receiving unit (21) has a retaining recess (40) for securing the spring element (24), which is preferably a wire loop, wherein the spring element (24) is bent several times and forms at least at one free end (43) a deflection point (30) for deflecting the tension cord (102).

3. Cord tensioning device according to claim 1 or 2, characterized by that At each of the two free ends (43) of the spring element (24) a deflection point (30) is formed for deflecting the tension cord (102), wherein the spring element (24) is fixed between the free ends (43) on the receiving unit (21).

4. Cord tensioning device according to one of claims 1 to 3, characterized by that a protective channel (39) is connected to the receiving unit (21), wherein the tension cord (102) is guided inside the protective channel (39) and / or the protective channel (39) has a deflection point (30).

5. Cord tensioning device according to claim 1, characterized by thata sliding element (22) is included which is guided linearly movable on the receiving unit (21), wherein the spring element (24) is supported with a first contact section (33) on the sliding element (22) and with a second contact section (34) on the receiving unit (21), and wherein the sliding element (22) is linearly displaceable against the spring force of the spring element (24).

6. Cord tensioning device according to claims 1 to 5, characterized by that a base element (23) connected to the receiving unit (21) is included, wherein the base element (23) can be fixed to a profile rail (103, 104) of a sun protection system (100).

7. Cord tensioning device according to claim 6, characterized by that the base element (23) forms a cover (35) for the lateral termination of a profile rail (103, 104) of a sun protection system (100).

8. Cord tensioning device according to claim 6 or 7, characterized by thatthe receiving unit (21) comprises a pivoting frame element (27), wherein the pivoting frame element (27) is pivotably arranged on the base element (23) and the sliding element (22) is linearly movable within the pivoting frame element (27).

9. Cord tensioning device according to one of the preceding claims, characterized by that the spring element (24) is preferably cylindrical over its entire length and preferably has two recesses (38).

10. Cord tensioning device according to one of the preceding claims, characterized by that the pivoting frame element (27) is pivotable between an unfolded insertion position and a folded-in mounting position and / or the sliding element (22) is displaceable between an insertion position and a mounting position, preferably in the direction of the base element (23).

11. Cord tensioning device according to claim 10 characterized by thatin the assembly position a locking connection is formed between the base element (23) and the swivel frame element (27) and / or the sliding element (22) engages in a guide of the receiving unit (21).

12. Cord tensioning device according to one of the preceding claims, characterized by that the base element (23) has at least one insertion opening (29) and / or the sliding element (22) has at least one insertion opening (29) for inserting the tension cord (102).

13. Cord tensioning device according to one of the preceding claims, characterized by that at least two deflection points (30) are included, which are arranged such that a tension cord (102) can be guided through the cord tensioning device (20) in an S-shape.

14. Cord tensioning device according to one of the preceding claims, characterized by thata deflection point (30) for a tension cord (102) is formed on the sliding element (22) and / or a deflection point (30) for a tension cord (102) is formed on the base element (23) and / or a deflection point (30) for a tension cord (102) is formed on the spring element (24) and / or a deflection point (30) for a tension cord (102) is formed on the receiving unit (21).

15. Cord tensioning device according to one of the preceding claims, characterized by that the base element (23) and / or the receiving unit (21) can be connected to a profile rail (103, 104) of a sun protection system (100) by means of a clamping connection and / or a snap connection.

16. Cord tensioning device according to claim 15, characterized by thatthe base element (23) and / or the receiving unit (21) has at least one locking arm (31) or an ascending locking wedge, which is preferably arranged laterally on the base element (23) and / or the receiving unit (21), for forming the locking connection with a profile rail (103, 104) of a sun protection system (100).

17. Sun protection system (10) comprising a profile rail (103, 104), a tension cord (102), a sun protection curtain (101) and a cord tensioning device (20) according to one of claims 1 to 16.

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