LAMELLENSTORE

Description

[0001] The invention relates to a louvre blind according to the preamble of claim 1. The louvre blind is a blind with movable slats for sun and weather protection, as well as privacy and, if necessary, security. The louvre blind is also referred to as a venetian blind or a slatted blind.

[0002] Slatted blinds with side guides, slats, and a bottom rail are used to close and open building openings, such as windows and doors. The bottom rail is lowered and raised using lifting straps, for example. The angle of the slats is adjusted using adjusting cords, for example, which are attached to the edges of the slats on both sides of the slats' longitudinal axis. By appropriately positioning the end rail located below the slats, slatted blinds allow for complete opening, covering an upper area, and completely covering building openings. When the end rail is lowered from its upper end position, the angle of the slats can be adjusted to a horizontal plane. The same drive mechanism is used for the upward and downward movements of the end rail and for adjusting the slat angle.

[0003] EP 1 213 437 A2 describes slatted blinds that can expose an upper area of ​​a building opening while covering the remaining lower area. Such a slatted blind comprises a top rail, slats, a bottom rail, two guides, and two drive devices arranged at the guides for moving the top rail or the bottom rail and for adjusting the inclination of the top rail. When installed, the guides and drive devices extend over a vertical range at the opposite longitudinal ends of the top rail and the bottom rail. The drive devices comprise closed chains, each with two supporting elements, running around an upper and a lower deflection device.The support elements enable two head rail brackets, with the head rail arranged between them, to be moved along the guides between an upper and a lower head rail end position, or end rail brackets, with the end rail arranged between them, to be moved between an upper and a lower end rail end position. The end rail is at the lower end rail end position when the head rail is moved, and the head rail is at the upper top rail end position when the end rail is moved. When the head rail is positioned at the upper top rail end position, in the solution according to EP 1 213 437 A2, the inclination of the slats that are not stacked on the end rail can be adjusted by adjusting the inclination of the head rail. For this purpose, adjusting cords on both sides of the longitudinal axis of the head rail lead from the head rail edges to the corresponding slat edges attached to the adjusting cords at equal intervals.

[0004] When the head rail is lowered and thus positioned below the upper end position, the solution according to EP 1 213 437 A2 does not allow the slats to be tilted to any desired angle. During the downward movement of the head rail, an inclination of approximately 45° to the horizontal plane is specified so that the slats can be smoothly deposited on the end rail positioned at the lower end position or on the slats resting on it during the lowering movement. During the upward movement of the head rail, the slats are in the open position with an inclination of approximately 0°.

[0005] It has now been shown that there are buildings and users of these buildings for whom it is important that, when the top rail is lowered, the slats above the stack of slats resting on the end rail can be set to any inclination, in particular to an inclination of approximately 90° to the horizontal plane, i.e. to a closed state.

[0006] The object of the invention is to find a solution in which the slats above the stack on the end rail can be adjusted between an open orientation that deviates only slightly from the horizontal orientation and a substantially vertical or closed orientation when the top rail is positioned below the upper top rail end position.

[0007] This object is achieved by a slatted blind having the features of claim 1. The dependent claims describe alternative or advantageous Versions that solve further tasks.

[0008] Based on the solution according to EP 1 213 437 A2, it was recognized as a first inventive step that the top rail holders, which hold the top rail and move it along the guides, must enable a functional change from moving the top rail to adjusting the inclination of the top rail, or vice versa, at any position between an upper and a lower top rail end position. After a movement of the top rail in a first direction, reversing the direction of movement of the drive devices or their support elements, which carry the top rail holders, should not move the top rail along the guides in the opposite direction, but rather adjust the inclination of the top rail. The top rail should only be moved after the inclination of the top rail has been adjusted to a predetermined closed or open state.

[0009] As part of a second inventive step, it was recognized that the functional change when changing the direction of movement of the support elements can be achieved if the head rail holders comprise inclination adjustment devices with clamping devices. The clamping devices can be clamped to the guides to adjust the inclination of the head rail and can be moved along the guides to move the head rail. The two states, "clampable" and "movable," are achieved with a device that can apply and release a braking force or a holding force between the head rail holders and the guides. The clamping devices can be designed as braking devices or, if necessary, as latching devices, and the clamping thus includes frictional contacts and engagement contacts.

[0010] The tilt adjustment is completed by adjusting the clamping devices after a predetermined distance, resulting from the movement of the support elements, and the associated release of the clamping on the guides. After the clamping is released, further movement of the support elements causes the top rail brackets and thus the top rail to move along the guides.

[0011] In an advantageous embodiment, both top rail brackets comprise guide parts that are slidably guided along the guides and on which the clamping devices of the tilt adjustment devices are movably arranged between two end positions. When the clamping devices are clamped to the guides, the support elements move the guide parts along the guides, and the clamping devices movably arranged on the guide parts cannot be moved along with them, but remain at the clamping points on the guides.

[0012] The clamping devices remain in the guide positions determined by the clamping until the guide elements are moved relative to the clamped clamping devices to such an extent that further movement of the guide elements results in an adjustment of the clamping devices. This adjustment causes the clamping on the guides to be released and the guide parts, together with the clamping devices, to move along the guides.

[0013] The clamping devices are designed in such a way that the described change of function can be achieved for both directions of movement of the top rail holders and for both pivoting directions of the inclination adjustment.

[0014] Preferably, the clamping and displaceability of the clamping devices on the guides depend on the position of the clamping devices relative to the guide parts. When the clamping devices are positioned in a range between two end positions on the guide parts that limit the range of relative movement, the clamping is established, and when the clamping devices are positioned at one of the two end positions on the guide parts, the displaceability is established.

[0015] In advantageous top rail mounts, the clamping devices each comprise a base plate on the guide part that can be moved in the direction of the associated guide, and two movable clamping elements on the base plate. The two movable clamping elements are pre-tensioned to clamp onto the associated guide for one of the two directions of movement of the guide. The clamping elements can be designed as braking elements or, if necessary, as locking elements, and the clamping thus comprises frictional contact or engagement contact with the associated guide.

[0016] Based on the frictional contact or engagement between a clamping element and the associated guide achieved by the preload, a minimal movement of the clamping element relative to the guide increases the frictional force or engagement achieved during clamping, so that further movement is prevented. At the two end positions of the clamping devices on the guide parts, the movable clamping elements can be adjusted against the preload by a release device on the guide part to release the clamping. Once the clamping is released, the base plate with the guide part can be moved by the support element along the guide. The two end positions of the clamping devices or base plates on the guide parts determine the maximum range of relative movement.

[0017] If the base plate is clamped to the guide with one of the movable clamping elements and the guide part is moved along the guide by the support element, the relative movement between the guide part and the base plate can be used to adjust the inclination of the head rail. For this purpose, the guide parts comprise inclination adjusters connected to the head rail, which are movably mounted on the guide parts and can be adjusted via a coupling on the guide parts depending on the relative position between the guide part and the base plate. With this adjustability, the inclination of the head rail can be set as desired from fully open to fully closed. As soon as the desired inclination is reached when adjusting the inclination, the movement of the support elements and the guide parts moved with them is stopped.

[0018] The coupling translates the relative movement between the guide parts and the base plates guided thereon into a movement of the tilt adjusters. In an advantageous embodiment, the coupling on the clamping devices, in particular on the base plate, comprises curved guides, and the tilt adjusters are rotatable about a rotation axis running parallel to the longitudinal axis of the top rail. The couplings also comprise pivot arms that are firmly connected to the tilt adjusters and are guided on the curved guide with a guide engagement spaced from the rotation axis.

[0019] The relative movement between the guide parts and the base plates guided by them results in a movement of the guide engagements along the curved guides. The pivot arms, the curved guides, and the end positions of the base plates on the guide parts are designed relative to the position of the tilt adjuster's rotation axis in such a way that the rotational movement of the tilt adjusters required for tilt adjustment between open and closed positions can be achieved.

[0020] In a further advantageous embodiment, the support elements on the top rail brackets engage in holding arms that are movably attached to the pivot arms of the couplings. The holding arms include receptacles at their free ends for receiving the support elements. To allow the holding arms to be suspended from supports at the upper ends of the guides, the holding arms include suspension elements at their free ends.

[0021] The support elements are arranged on the enclosed drive elements that run around an upper and lower deflection device. When the support elements move the holding arms of the top rail brackets in accordance with the movement of the drive elements up to the upper deflection device, around which they move and slightly downwards, the holding arms are hooked onto the guide supports with the suspension elements at the end of this movement. Upon further movement of the drive elements, the support elements are moved downward and exit the holders on the holding arms. The top rail remains at the upper end of the guides.

[0022] When the head rail brackets are moved slightly downward after moving around the upper deflection device, the clamping devices are clamped to the guides, and the tilt adjustment devices adjust the tilt of the head rail. The position of the supports relative to the upper deflection devices is selected so that the tilt adjustment devices align the head rail at a predetermined tilt during the downward movement of the head rail brackets, leading to the hooking. This predetermined tilt of the head rail corresponds to the desired working position of the slats during the movement of the end rail.

[0023] In an advantageous embodiment, the retaining arms are provided with anti-lift devices that prevent the support elements from dislodging their receptacles when the top rail is manually lifted. These devices include, for example, locking plates that only allow the support elements to be removed from their receptacles when the upper deflection device is in place.

[0024] The support elements for moving the end rail are arranged opposite the support elements for moving the top rail on the closed drive elements. When the support elements for moving the top rail are at the upper deflection device, the end rail is at the lower end rail end position, and the support elements for moving the end rail are at the lower deflection device.

[0025] When the drive elements continue to move in the same direction, the end rail support elements engage with the end rail brackets and move the end rail upward along the guides. If the direction of movement of the drive elements is reversed while the end rail is raised, the end rail moves downward. During the end rail movement, the top rail does not change its inclination, and the slats remain in the working position as long as the end rail is above the lower end rail position, or as long as the top rail is held by the support arms on the supports.

[0026] The end rail brackets comprise guide sections guided along the guides and end rail supports connected to the end rails. To ensure that the end rail supports can only be moved upwards by the support elements or drive elements, an advantageous design incorporates anti-lift devices. These anti-lift devices prevent the end rail from being pushed upwards by hand.

[0027] With an advantageous high-impact protection device, the end rail supports are held on the guide areas so that they can move in the direction of the guides between a lower and an upper stop. When the end rail supports are positioned at a distance from the lower stop, the high-impact protection device is activated. When the end rail brackets or the guide areas are moved upwards by the support elements, the end rail supports are at the lower stop, the high-impact protection device is deactivated, and the end rail, with the end rail brackets moved upwards, is moved from the lower end rail end position toward the upper end rail end position.

[0028] An advantageous anti-lift device comprises at least one spring element on each end rail bracket. When the end rail support is positioned at a distance from the lower stop, the spring elements are resiliently deflected from release positions into engagement positions by deflection areas of the guide areas. In the engagement positions, if an attempt is made to push upwards, the spring elements engage the securing elements firmly connected to the guides, preventing further upward movement. In the release positions, the support elements can move the end rail brackets upward because the spring elements do not engage the securing elements.

[0029] The invention is described in more detail below with reference to some figures. Figure 1a perspective view of a slatted blind with lowered top rail, Figure 2a section of Fig. 1, Figure 3 a perspective view of a closed slatted blind, Figure 4 a section of Fig. 3 , Figure 5a perspective view of a slatted blind with raised end rail, Figure 6a section of Fig. 5 , Figure 7 a schematic representation of the slatted blinds with drive devices, Figure 8 a schematic representation of the slatted blinds with drive devices, Figure 9 a perspective representation of a head rail holder with two clamping elements in clamping position, Figure 10 a perspective representation of a head rail holder with a clamping element in release position, Figure 11 a perspective representation of a head rail holder with a clamping element in release position, Figure 12 an exploded view of the head rail holder according to Fig. 9, Figure 13 a perspective view of a guide, Figure 14 a section of the guide with the top rail holder arranged therein, Figure 15 a perspective view of the upper end of the guide, Figure 16 a perspective view of a drive chain with the holding arm of a top rail holder held thereon, Figure 17 an exploded view of the end rail holder, Figure 18 a perspective view of the end rail holder, and Figure 19 a perspective view of the high impact protection device.

[0030] The Figures 1 to 6 show a slatted blind 1 in different positions. In the position according to the Figures 1 and 2 An upper area of ​​a building opening is exposed and the remaining lower area is covered. In the application position according to the Figures 3 and 4 The entire building opening is covered. In the application position according to the Figures 5 and 6an upper area of ​​a building opening is covered and the remaining lower area is open.

[0031] The slatted blind 1 comprises a top rail 2, slats 3, an end rail 4, two guides 5, and two drive devices 6 arranged at the guides 5 for moving the top rail 2 or the end rail 4 and for adjusting the inclination of the top rail 2. In the assembled state, the guides 5 and the drive devices 6 extend over a vertical range at the opposite longitudinal ends of the top rail 2 and the end rail 4. The drive devices 6 each comprise closed drive elements 9, for example chains, each with two support elements 10, running around an upper and a lower deflection device 7 and 8, respectively.

[0032] In the illustrated embodiment, the two guides 5 are connected at the upper end with a connecting profile V. The connecting profile contains a drive motor and a shaft for driving the two drive devices 6, which drives the drive elements 9 of the two upper deflection devices 7. It goes without saying that the shaft can also be driven via a manually operated crank.

[0033] The support elements 10 make two head rail holders 11 with the head rail 2 arranged therebetween displaceable between an upper and a lower head rail end position or end rail holders 12 with the end rail 4 arranged therebetween displaceable between an upper and a lower end rail end position along the guides 5, wherein the end rail 4 is at the lower end rail end position when the head rail 2 is moved and the head rail 2 is at the upper head rail end position when the end rail 4 is moved.

[0034] The upper rail holders 11 comprise inclination adjustment devices 13, which make the inclination of the upper rail 2 adjustable when the upper rail 2 is in a position spaced from the upper upper rail end position and when the drive devices 6 are moved, wherein the inclination adjustment devices 13 comprise clamping devices 14, which can be clamped to the guides 5 for adjusting the inclination of the upper rail 2 and are displaceable along the guides 5 for moving the upper rail 2.

[0035] The Figures 7 and 8 show that the support elements 10 for moving the end rail 4 are arranged opposite the support elements 10 for moving the upper rail 2 on the closed drive elements 9. Fig. 7shows the upper rail 2 slightly below the upper deflection device 7. Retaining arms 15 with receptacles 16 formed at their free ends are suspended from the supporting elements 10. The retaining arms 15 are movably attached to the upper rail brackets 11.

[0036] If holding arms 15 and thus head rail holders 11 are held on the support elements 10, the end rail is at the lower end rail end position, the head rail can be moved upwards or downwards and the inclination of the head rail 2 can be adjusted. Fig. 7 shows that the slats 3 are closed when the head rail 2 changes to the upward movement and opened when the head rail 2 changes to the downward movement. The desired inclination of the slats 3 is set by stopping the movement of the head rail 2 at the desired inclination. During the continuous downward movement, the slats 3 are open, and during the continuous upward movement, they are closed.

[0037] In the illustrated embodiment, the inclination of the top rail 2 is transmitted via adjusting cords S to the slats 3, which are not part of the stack on the end rail 4. The adjusting cords S lead on both sides of the longitudinal axis of the top rail 2 from the top rail edges to the corresponding slat edges attached to the adjusting cords at equal intervals.

[0038] When the support elements 10 have moved the holding arms 15 of the upper rail holders 11 held thereon over the upper deflection devices 7, the holding arms 15 are suspended with their arm ends 17 on supports 18 of the guides 5 (cf. Fig. 8During the brief downward movement of the top rail brackets 11 leading to the hooking, the clamping devices 14 are clamped to the guides 5, and the top rail 2 is aligned at a predetermined inclination by the inclination adjustment devices 13. This predetermined inclination of the top rail 2, corresponding to the length of the downward movement, corresponds to the desired working position of the slats 3 during the movement of the end rail 4.

[0039] After hanging, a further movement of the drive elements 10 in the same direction causes the support elements 10 to move downward, thereby exiting the receptacles 16 of the holding arms 15. The top rail 2 remains at the upper end of the guides 5.

[0040] Fig. 8shows that the support elements 10 for moving the end rail 4 are at the lower deflection device 8 when the support elements 10 for moving the upper rail 2 are at the upper deflection device 7. Upon further movement of the drive elements 9 in the same direction of rotation, the end rail 4 is moved upwards by the holding elements 10 engaging in the end rail holders 12.

[0041] If the direction of movement of the drive elements 9 is reversed while the end rail 4 is raised, the end rail 4 moves downwards again. During the upward and downward movements of the end rail 4, the upper rail 2 does not change its inclination, and thus the slats 3 remain in the working position as long as the upper rail 2 is held by the support arms 15 on the supports 18.

[0042] When the top rail 2 is lifted from its suspended position on the supports 18 by retaining elements 10, which enter the receptacles 16 of the retaining arms 15 from below, the top rail brackets 11 move slightly upward at the upper deflection devices 7. This allows the clamping devices 14 to clamp onto the guides 5, and the top rail 2 is moved into the closed position by the tilt adjustment device 13. After passing over the upper deflection devices 7, the top rail brackets 11 are moved downward, the clamping brackets 14 are clamped onto the guides 5, and the tilt adjustment devices 13 move the top rail 2 into the open position.

[0043] Fig. 9 to 16show the details and functionality of the head rail brackets 11 of an advantageous embodiment. The head rail brackets 11 comprise guide parts 19, which are slidably guided on the guides 5. The clamping devices 14 of the tilt adjustment devices 13 are movably arranged on the guide parts 19 between two end positions. When the clamping devices 14 are clamped to the guides 5, the support elements 10 move the guide parts 19 along the guides 5, and the clamping devices 14 movably arranged on the guide parts 19 cannot be moved along with them, but remain at the clamping points on the guides 5.

[0044] The clamping devices 14 remain in the positions of the guides 5 determined by the clamping until the guide elements 19 are moved relative to the clamped clamping devices 14 to such an extent that further movement of the guide elements 19 results in an adjustment of the clamping devices 14. This adjustment causes the clamping on the guides 5 to be released and a movement of the guide parts 19 together with the clamping devices 14 along the guides 5.

[0045] The clamping devices 14 are designed so that the described function change for both

[0046] directions of movement of the top rail brackets 11 and for both pivoting directions of the inclination adjustment.

[0047] In the illustrated top rail holders 11, the clamping devices 14 each comprise a base plate 20 displaceable on the guide part 19 in the direction of the associated guide 5 and two movable clamping elements 21 on the base plate 20, preferably pivotable about pivot axes. The two movable clamping elements 21 are pre-tensioned by a spring 22 for clamping to the associated guide 5 for each of the two directions of movement of the guide 5. A guide 5 according to Fig. 13 For example, it comprises a web 23 which, according to Fig. 14 between two clamping projections 24 of the clamping elements 21.

[0048] Based on the frictional contact or engagement achieved by the preload between a clamping element 21, or the clamping projections 24, and the associated guide 5, or the web 23, a minimal movement of the clamping element 21 relative to the guide 5 causes an increase in the frictional force or engagement achieved during clamping, so that further movement is prevented.

[0049] At the two end positions of the clamping devices 14 on the guide parts (cf. Figs. 10 and 11 ), the movable clamping elements 21 are adjustable against the preload by a release device 25 of the guide part 19 to release the clamping. Once the clamping is released, the base plate 20 with the guide part 19 can be moved by the support element 10 along the guide 5. The two end positions of the clamping devices 14 or base plates 20 on the guide parts 19 determine the maximum range of relative movement.

[0050] When the base plate 20 is clamped to the guide 5 with one of the movable clamping elements 21 and the guide part 19 is moved by the support element 10 along the guide 5, the relative movement between the guide part 19 and the base plate 20 can be used to adjust the inclination of the top rail 2. For this purpose, the guide parts 19 comprise inclination adjusters 26 connected to the top rail 2, which are movably mounted on the guide parts 19 and can be adjusted via a coupling according to the relative position between the guide part 19 and the base plate 20 on the guide parts 19. With this adjustability, the inclination of the top rail 2 can be set as desired from fully open to fully closed. As soon as the desired inclination is reached during the adjustment of the inclination, the movements of the support elements 10 and the guide parts 19 moved thereby are stopped.

[0051] The coupling translates the relative movement between the guide parts 19 and the base plates 20 guided thereon into a movement of the tilt adjusters. In the illustrated embodiment, the coupling on the base plates comprises curved guides 27, and the tilt adjusters 26 are rotatable about a rotation axis running parallel to the longitudinal axis of the top rail 2. The couplings also comprise pivot arms 28, which are rigidly connected to the tilt adjusters 26 and guided by a guide engagement 29 on the curved guide 27 spaced from the rotation axis.

[0052] The relative movement between the guide parts 19 and the base plates 20 guided thereon leads to a movement of the guide engagements 29 along the curved guides 27. The pivot arms 28, the curved guides 27 and the end positions of the base plates 20 on the guide parts 19 are designed relative to the position of the axis of rotation of the inclination adjusters 26 in such a way that the rotational movement of the inclination adjusters 26 required for the inclination adjustment between open and closed can be achieved.

[0053] In the illustrated embodiment, the support elements 10 engage with the support arms 15 at the top rail brackets 11, which are movably attached to the pivot arms 28 of the couplings. The support arms 15 include receptacles 16 at their free ends for receiving the support elements 10. To allow the support arms 15 to be suspended from supports 18 at the upper ends of the guides 5, the guides 5 include suspension elements 30 at their free ends.

[0054] Fig. 17 to 19 show advantageous end rail brackets 12 with a guide area 31 guided along the guides 5 and with an end rail support 32 connected to an end rail 4. To ensure that the end rail support 32 can only be moved upwards by a support element 10 or a drive element 9, the illustrated embodiment includes a push-up safety device. The push-up safety device prevents the end rail 4 from being pushed upwards by hand.

[0055] The high-impact protection is achieved by the end rail support 32 being held on the guide area 31 so that it can move between a lower and an upper stop in the direction of the guides 5. When the end rail support is positioned at a distance from the lower stop, the high-impact protection is activated. When the end rail holder 32 or the guide area 31 is moved upward by a support element 10, the end rail support 32 is at the lower stop, the high-impact protection is deactivated, and the end rail 4, with the end rail holder 32 moved upward, is moved from the lower end rail end position toward the upper end rail end position.

[0056] In the illustrated anti-lift device, the end rail holder 12 comprises at least one spring element 33. When the end rail support 32 is positioned at a distance from the lower stop, the spring elements 33 are resiliently deflected from the release position into the engaged position by deflection regions 34 of the guide regions 31. In the engaged position, when an attempted upward push is made, engagement regions 35 of the spring elements 33 engage with securing elements 36 firmly connected to the guides 5, preventing further upward push. In the release position, the support elements 10 can move the end rail holders 12 upward because the spring elements 33 do not engage with the securing elements 36.

[0057] In an advantageous embodiment, the holding arms 15 are provided with anti-release devices 37, which prevent the support elements 10 from dislodging the receptacles 16 when the upper rail 2 is manually lifted. The anti-release devices 37 comprise, for example, securing plates that allow the support elements to be removed from the receptacles only at the upper deflection device 7.

Claims

1. Venetian blind (1) for building openings, comprising an upper rail (2), two upper-rail mounts (11), slats (3), an end rail (4), two end-rail mounts (12), two guides (5) and, at each guide (5), comprising a drive device (6) for moving the upper rail (2) or the end rail (4) and for adjusting the inclination of the upper rail (2) and accordingly at least one of the slats (3), the guides (5) and the drive devices (6) extending, when installed, over a height range at the longitudinal ends of the upper rail (2) and the end rail (4) that face away from one another, and the drive devices (6) each comprising drive elements (9) that run around a top and a bottom deflection device (7, 8) and each comprise two support elements (10), which support elements (10) make the upper-rail mounts (11) having the upper rail (2) arranged therebetween displaceable between a top and a bottom upper-rail end position or make the end-rail mounts (12) having the end rail (4) arranged therebetween displaceable along the guides (5) between a top and a bottom end-rail end position, the end rail (4) being in the bottom end-rail end position when the upper rail (2) is moved and the upper rail (2) being in the top upper-rail end position when the end rail (4) is moved, the upper-rail mounts (11) comprising inclination-adjusting devices (13) which make the inclination of the upper rail (2) adjustable in positions of the upper rail (2) in which it is spaced apart from the top upper-rail end position and when the drive devices (6) are causing a movement, characterized in that the inclination-adjusting devices (13) comprise clamping devices (14), which can be clamped to the guides (5) for adjusting the inclination of the upper rail (2) and can be displaced along the guides (5) for moving the upper rail (2).

2. Venetian blind (1) according to Claim 1, characterized in that both upper-rail mounts (11) comprise guide parts (19), which are displaceably guided on the guides (5) and on which the clamping devices (14) of the inclination-adjusting devices (13) are arranged so as to be movable between two end positions.

3. Venetian blind (1) according to Claim 2, characterized in that the clamping and displaceability of the clamping devices (14) on the guides (5) can be set depending on the position of the clamping devices (14) relative to the guide parts (19): if the clamping devices (14) are positioned on the guide parts (19) in a region between the two end positions, the clamping is set, and if the clamping devices (14) are positioned on the guide parts (19) in one of the two end positions, the displaceability is set.

4. Venetian blind according to Claim 3, characterized in that the clamping devices (14) each comprise a base plate (20) that is displaceable on the guide part (19) in the direction of the associated guide (5) and two movable clamping elements (21) on the base plate (20), each of the two movable clamping elements (21) being preloaded for one of the two movement directions of the associated guide (5) in order to clamp to the guide (5) and, in the two end positions of the clamping devices (14), being adjustable by a release device (25) of the guide part (19) in order to remove the clamping counter to the preload.

5. Venetian blind (1) according to any one of Claims 2 to 4, characterized in that the guide parts (19) comprise inclination adjusters (26) which are connected to the upper rail (2), are movably mounted on the guide parts (19) and are adjustable on the guide parts (19) via a coupling according to the position of the clamping devices (14), the inclinations of the upper rail (2) being able to be set from fully open to fully closed and, for adjusting the inclination, the clamping devices (14) being clamped to the guides (5) and the guide parts (19) being moved by the drive devices (6).

6. Venetian blind (1) according to Claim 5, characterized in that the clamping devices (14) comprise curved guides (27), the inclination adjusters (26) are rotatable about an axis of rotation extending in parallel with the longitudinal axis of the upper rail (2), and the couplings comprise pivot arms (28), which are rigidly connected to the inclination adjusters (26) and are guided on the curved guide (27) by a guide engager (29), which is spaced apart from the axis of rotation.

7. Venetian blind (1) according to Claim 6, characterized in that retaining arms (15) are movably fastened to the pivot arms (28) of the couplings, the retaining arms (15) comprising receptacles (16) at their free ends for receiving the support elements (10) and comprising mounting elements (30) for mounting on brackets (18) at the upper ends of the guides (5).

8. Venetian blind (1) according to any one of Claims 1 to 7, characterized in that the end-rail mounts (12) comprise guide regions (31) guided on the guides (5) and end-rail supports (32) connected to the end rails (4).

9. Venetian blind (1) according to any one of Claims 1 to 8, characterized in that the end-rail supports (32) are retained on the guide regions (31) so as to be movable in the direction of the guides (5) between a bottom and a top stop of the guide regions (31) and, in a position spaced apart from the bottom stop, activate safety locking devices of the end-rail mounts (12) such that, when the end-rail mounts (4) are moved upwards, the end rail (4) is movable from the bottom end-rail end position to the top end-rail end position, but can be raised by hand from the bottom end-rail end position only as far as a height predetermined by the safety locking device.

10. Venetian blind (1) according to Claim 9, characterized in that the safety locking devices each comprise at least one spring element (33), which spring elements (33), in the position of the end-rail support (4) in which it is spaced apart from the bottom stop, can be deflected in a sprung manner from released positions into engagement positions by deflection regions (34) of the guide regions (31), engagement regions (35) engaging in securing elements (36) that are rigidly connected to the guides (5) in the engagement positions.