EP3608498A1 - Lamellar blind - Google Patents

Abstract

The invention relates to a slat blind which comprises at least one lever mechanism (38) which is set up to translate an essentially linear movement into a tilting movement for adjusting the inclination of a lower rail (18). Furthermore, the slat blind comprises at least one slide (43) which is set up to receive the lever mechanism (38), the slide (43) being movable at least in sections with the lower rail (18) along a guide rail. The lever mechanism (38) comprises a swivel lever (40) and a stop device (60), the swivel lever (40) being articulated at two sections thereof to the lower rail (18) and the slide (43). The stop device (60) is designed to restrict a pivoting range of the pivoting lever (40) in relation to the slide (43) within a predetermined angular range.

Description

The present invention relates to a slat blind according to claim 1 of the present invention.

Louvre blinds are used to protect against sun rays and weather. The slat blinds can be installed in particular on the outside of a building in front of windows and / or doors. Slat blinds are known which contain a blind curtain with a plurality of slats and a bottom rail which closes the blind curtain at the bottom. The slats and the final bottom rail can be guided laterally between the respective guide rails. The slats together with the final bottom rail can be connected by flexible connecting elements, e.g. Cords to be joined together. In addition, the individual slats can be pivoted into different inclination positions in order to regulate the incidence of light. If the blind curtain is lowered to the lowest possible position and the individual slats together with the bottom rail are swiveled out of the horizontal position as far as possible, the incidence of light can be largely shielded or a high degree of darkening can be achieved.

In the publication CH 712 613 A1 a lever mechanism is proposed for pivoting the lower rail and thus also the slats, which in the lower rail a vertical direction swings (incidence of light) or swings down (darkening). The lever mechanism is set up to convert a substantially linear movement into a tilting movement in order to adjust the inclination of the lower rail. There is a problem in the prior art in that the lower rail can be aligned in an imprecise manner. In addition, the lever mechanism can have insufficient stability.

The object of the present invention is to provide a slat blind which does not have the disadvantages mentioned above. This object is achieved by a slat blind with the features according to claim 1. Advantageous design variants are specified in further claims.

According to the invention, a slat blind comprises laterally arranged guide rails, a blind curtain arranged between the guide rails with a plurality of slats, a lower rail closing the blind curtain and at least one elevator device. Furthermore, the slat blind comprises at least one lever mechanism, which is set up to translate an essentially linear movement into a tilting movement for adjusting the inclination of the lower rail. Also included is at least one slide, which is designed to receive the lever mechanism, the slide being movable at least in sections with the lower rail along the guide rail. The Lever mechanism includes a pivot lever and a stop device. Here, the pivot lever is articulated to the lower rail and the slide at two sections thereof, and the stop device is designed to restrict a pivot range of the pivot lever in relation to the slide within a predetermined angular range.

This creates a slat blind with a lever mechanism, via which the lower rail can be pivoted within a definable range. The definable pivoting of the lower rail is achieved by the stop device, which limits the angular range of the pivoting lever in relation to the slide within a predetermined angular range. In this way, predetermined end positions (open position or gathering position) can be exactly maintained. The stability of the lever mechanism is also increased by the stop device.

The lower rail is suspended or mounted eccentrically. Therefore, a greater force has to be applied in order to align or incline the bottom rail horizontally in the freely hanging state. For this purpose, the lever mechanism for power transmission is used, which can be designed, for example, as a toggle lever. The lever mechanism translates an essentially long linear movement into a relatively short tilting movement with translated high force. The lever mechanism can be a any mechanism with high power transmission or torque transmission. The slide can be moved at least in sections along with the lower rail along the guide rail. The lever mechanism thus follows the vertical direction in which the lower rail is moved along the guide rail.

In an advantageous aspect of the slat blind, the stop device contains a substantially arcuate recess, which is formed in the swivel lever or slide, and a projection which engages therein, which is attached in the other of the swivel lever or slide. In a preferred example, the arcuate recess can be formed in the swivel lever and the projection can be attached to the slide, the arcuate recess and the projection being in engagement with one another. In an alternative example, the arcuate recess can be formed in the carriage and the projection can be attached to the pivot lever, the arcuate recess and the projection also being in engagement here. In both examples, the pivot lever can only be pivoted in the area between the stop of the two ends of the arcuate recess on the projection. By i.a. the swivel range can be adjusted by a suitable choice of the extent of the arcuate recess.

In an advantageous aspect of the slat blind, the essentially arcuate recess is one in the swivel lever trained through opening and the projection is a bolt fixed to the carriage, the through opening and the bolt being in mutual engagement. This particularly preferred embodiment can be implemented reliably and also allows simple assembly. Another advantage lies in the simplified manufacture of a swivel lever designed in this way. Furthermore, the bolt is in contact with the entire thickness of the swivel lever and thus a maximum area, which increases the stability.

In an advantageous aspect of the slat blind, the arcuate recess and the projection cooperate in such a way that the projection and one end of the arcuate recess come into mutual contact as soon as the lower rail assumes a substantially vertical orientation in relation to the longitudinal extension of the guide rails. By a suitable choice of the extent of the arcuate cutout, the lower rail can also be moved into the desired position, e.g. vertical position, align or stop if torque should continue to be applied to a pivot axis of the pivot lever.

In an advantageous aspect of the slat blind, the arcuate recess and the projection cooperate in such a way that the projection and one end of the arcuate recess come into mutual contact as soon as the lower rail is pivoted downward in a substantially parallel manner in relation to the longitudinal extension of the guide rails. Through a suitable choice of extension The arcuate recess allows the lower rail to be pivoted downward as desired and then stopped as predetermined if torque should continue to be applied to a pivot axis of the pivoting lever.

In an advantageous aspect of the slat blind, a diameter of the projection engaged in the arcuate recess is equal to a distance between the two longitudinal edges of the arcuate recess. Thus, the arcuate recess (over its two longitudinal edges) is guided on the projection without play. As a result of this interaction, the swivel lever is guided without play in relation to the slide. This increases the stability of the lever mechanism.

In an advantageous aspect of the slat blind, end sections of the lower rail are provided with projecting centering pins which are each guided in an elongated hole formed in the slide. The lower rail contains protruding centering pins on its two longitudinal ends, which are guided vertically in elongated holes, which are each formed in the two slides. Due to the essentially central pivot bearing of the lower rail on the two pivot levers, the lower rail is reliably pivoted according to the principle of a toggle lever.

In an advantageous aspect of the slat blind, the slats each have a closing panel surface and one for this purpose, in the upper section angled upper edge, the angled upper edge being provided with laterally projecting guide pins, via which the slats are pivotably guided in the guide rails, the final panel surface projecting laterally at least in sections over the angled upper edge in such a way that projecting sections of the panel surface can be brought into contact with the guide rails and are at least partially overlapped with the lateral guide rails. This creates a slat blind, which allows almost complete darkening, since the individual slats are brought into contact with the two guide rails in the closed state with their panel surfaces. The end sides of the slats overlap with the guide rails so that there is no gap through which light can enter the interior of the building. This advantage arises because the guide pins are each attached to a section of the lamellae, here defined as the upper edge, which is angled with respect to the panel surface. The upper edge can be angled at an angle in a range from 50 ° to 90 °, preferably essentially 70 °, with respect to the panel surface. During the lifting and lowering of the slats, the lower rail is kept in a horizontal position, so that the stack of slats is also kept in a horizontal position. As soon as the lower rail is in the lowest position, the lower rail can also be swiveled. The slat blind according to the invention allows a precisely definable pivoting of the lower rail by the Stop device the swivel range of the swivel lever is predetermined in relation to the carriage. In this way, desired end positions (closed position or gathering position) can be maintained. In addition, the lever mechanism is stabilized by the stop device. Furthermore, the slat blind allows a degree of blackout when closed, which can be similar to that of a roller shutter - but with a very significant advantage over a roller shutter, namely that the slats can be easily inclined at any time. Here, light can enter the interior of the building and the user is able to look outside almost undisturbed. The light / brightness regulation of the slat blind is greatly improved compared to roller shutters. This creates a slat blind, which with simple means offers almost complete darkening and also a very comprehensive light / brightness regulation. The slat blind also advantageously allows complete privacy from the outside into the building and also has a burglar-resistant appearance because it looks like a roller shutter from the outside when closed. In addition, no beads or bending edges in the visible curtain area disturb the aesthetics.

In an advantageous aspect of the slat blind, mutually vertically adjacent slats are overlapped at least in sections. In this case, lower edge sections of the diaphragm surfaces each lie on upper edge sections of the diaphragm surface from below arranged slats. When the blinds are completely shut down, the overlapping of the adjacent slats can be minimal, but still sufficient to prevent the penetration of light.

It is expressly pointed out that the above design variants can be combined as desired. Only those combinations of design variants are excluded that would lead to contradictions through the combination.

Figuren 1a-f

mehrere Detailansichten von einem Hebelmechanismus einer Lamellenstore gemäss der Erfindung zum Neigen einer Unterschiene zwischen einer Raff-Stellung und einer geschlossenen Stellung; und

Figuren 2a-c

mehrere Detailansichten des Hebelmechanismus der erfindungsgemässen Lamellenstore zur Erläuterung einer Abfolge zum Schwenken der Unterschiene von einer Raff-Stellung in eine geschlossene Stellung.

The present invention is explained in more detail below on the basis of exemplary embodiments illustrated in the drawings. Show:

Figures 1a-f

several detailed views of a lever mechanism of a slat blind according to the invention for tilting a lower rail between a gathering position and a closed position; and

Figures 2a-c

several detailed views of the lever mechanism of the slat blind according to the invention to explain a sequence for pivoting the lower rail from a gathering position into a closed position.

Figures 1a-f show detailed views of a lever mechanism 38 of a slat blind 10 according to the invention for inclining a lower rail 18 between a gathering position and a closed position, and Figures 2a-c show several detailed views of the lever mechanism 38 of the slat blind 10 according to the invention to explain a sequence for pivoting the lower rail 18 from a gathering position into a closed position. The slat blind 10 contains two guide rails 12 (for illustrative reasons is in Fig. 2b only one guide rail 12 shown in sectional view) for vertically guiding a blind curtain (not shown) arranged between the guide rails 12, which in turn contains a plurality of slats (not shown). The blind curtain is closed on its underside by a lower rail 18. The lower rail 18 can be moved up and down by means of a belt drive (not shown) which is integrated in the guide rail 12. When the lower rail 18 is moved up, slats positioned one above the other are picked up sequentially and moved further upwards with the lower rail 18 and slats already taken up, until this slat also receives a previously superordinate slat, and so on (generally known as external venetian blind principle). The individual slats can be pivoted and vertically adjustable in the guide rails 12 via guide pins. For this purpose, the guide rails 12 each have a vertically running recess. The lower rail 18 can be supported in the center by means of a cable connected to it, so that the lower rail 18 will not sag.

The lever mechanism 38 provides leverage to help raise the lower rail 18 from a substantially vertical orientation, also referred to as a closed position, to a substantially horizontal orientation, also referred to as a gathering position. The bottom rail 18 is end-sided, i.e. eccentric, suspended or supported via centering pins 59 on both sides. Therefore, compared to a solution in which a lower rail is mounted essentially in the middle, an increased force must be applied in order to raise the lower rail 18. This is supported by the lever mechanism 38, which, like the principle of a toggle lever, transfers the lower rail 18 into the horizontal position (and vice versa into the vertical position). For this purpose, a pivot lever 40 of the lever mechanism 38 hinges on a central section 42 or pivot point of the lower rail 18 in order to apply an increased pressure force for erecting the lower rail 18 in accordance with the principle of an extended lever arm. Here, the pivot lever 40 is articulated on two sections thereof, in each case via the central section 42, on the lower rail 18 and articulated on the slide 43 via a joint 41. The lever mechanism 38 is received in a carriage 43, via which the lever mechanism 38 can be moved together with the lower rail 18 along the guide rail 12.

According to the invention, the lever mechanism 38 further comprises a stop device 60, which is designed to restrict a pivoting range of the pivoting lever 40 in relation to the slide 43 within a predetermined angular range. In the example shown, the stop device 60 comprises a substantially arcuate recess 62, which is formed in the pivot lever 40, and a projection 64 engaging therein, which is attached to the slide 43. The arcuate recess 62 may be an elongated opening formed in the pivot lever 40, and the projection 64 may be a bolt 64 fixed to the carriage 43. Here, the arcuate recess 62 and the bolt 64 are mutually engaged. Thus, the arcuate recess 62 and the bolt 64 cooperate in such a way that the bolt 64 and one end of the arcuate recess 62 come into contact with one another as soon as the lower rail 18 assumes a desired, substantially vertical alignment in relation to the longitudinal extent of the guide rails. The torque resulting from the force F1 and the lever is absorbed by the lever mechanism 38, as in FIG Figure 1a illustrated by the two opposite arrows X. Likewise, the arcuate recess 62 and the bolt 64 cooperate in such a way that the bolt 64 and the further end of the arcuate recess 62 come into mutual contact as soon as the lower rail 18 has been pivoted downward in a substantially parallel manner in relation to the longitudinal extent of the guide rails 12 , The lever mechanism 38 of the slat blind according to the invention, through its stop device 60, ensures that the lower rail 18 and thus also the slats coupled to it are aligned as desired can, for example, in such a way that an optically flat curtain surface is obtained.

In order to increase the stability, a diameter of the bolt 64 engaged in the arch-shaped recess 62 is equal to a distance between the two longitudinal edges (or edges in the longitudinal direction) of the arch-shaped recess 62. There is therefore no play between the arch-shaped recess 62 and the bolts 64, which increases stability.

As in the sequence in the Figures 2a-c shown, two forces F2 and F3 act in opposite directions when the lower rail is pulled up. The force F2 is applied to a connecting link of the lower rail 18 with a cable drive, for example, and is directed upwards. On the other hand, the gravitational force F3 acts on the lever mechanism 38. In the fully lowered state, the right end of the arcuate recess 62 and the bolt 64 abut each other. Swiveling of the lower rail 18 is thus prevented. In this way, the desired, essentially horizontal alignment of the lower rail 18 can be ensured. When the lower rail 18 is pulled up, the pivot lever 40 pivots clockwise. In the course of pulling up the lower rail 18, the lower rail 18 tilts further and further downward, the left end of the arcuate recess 62 then striking against the bolt 64 when the desired orientation or inclination has been reached. The pivoting lever 40 is pivoted further then stopped and the lower rail 18 remains in the desired inclination.

Claims (9)

Slat blind (10), comprising: - laterally arranged guide rails (12), a blind curtain arranged between the guide rails (12) and having a plurality of slats, - a bottom rail (18) which closes the blind curtain, - at least one elevator device, - At least one lever mechanism (38), configured to translate an essentially linear movement into a tilting movement for adjusting the inclination of the lower rail (18), and at least one slide (43) designed to receive the lever mechanism (38), the slide (43) being movable at least in sections with the lower rail (18) along the guide rail (12), wherein the lever mechanism (38) comprises a swivel lever (40) and a stop device (60), the swivel lever (40) being articulated at two sections thereof to the lower rail (18) and the slide (43), the stop device (60 ) is designed to restrict a pivoting range of the pivoting lever (40) in relation to the slide (43) within a predetermined angular range. Slat blind (10) according to claim 1, wherein the stop device (60) has a substantially arcuate recess (62) which is formed in the pivot lever (40) or slide (43), and a projection (64) engaging therein, which in the other is attached by the pivot lever (40) or carriage (43). Slat blind (10) according to claim 2, wherein the substantially arcuate recess (62) is a through opening formed in the pivot lever (40), and wherein the projection (64) is a bolt (64) fixed to the carriage (43), wherein the through opening (62) and the bolt (64) are mutually engaged. Slat blind (10) according to claim 2 or 3, wherein the arcuate recess (62) and the projection (64) cooperate such that the projection (64) and one end of the arcuate recess (62) come into abutment when the bottom rail (18) assumes a substantially vertical orientation in relation to the longitudinal extent of the guide rails (12). Slat blind (10) according to any one of claims 2 to 4, wherein the arcuate recess (62) and the The projection (64) cooperate in such a way that the projection (64) and one end of the arcuate recess (62) come into mutual contact as soon as the lower rail (18) is pivoted downward in a substantially parallel manner in relation to the longitudinal extent of the guide rails (12) is. Slat blind (10) according to any one of claims 2 to 5, wherein a diameter of the projection (64) engaged in the arcuate recess (62) is equal to a distance between the two longitudinal edges of the arcuate recess (62). Slat blind (10) according to one of the preceding claims, wherein end sections of the lower rail (18) are provided with projecting centering pins (59) which are each guided in an elongated hole formed in the slide (43). Slat blind (10) according to one of the preceding claims, wherein the slats each have a closing panel surface and an upper edge angled to the upper section, the angled upper edge being provided with laterally protruding guide pins via which the slats can pivot in the guide rails (12) are led, the final panel surface protrudes laterally at least in sections over the angled upper edge in such a way that projecting sections of the panel surface can be brought into contact with the guide rails (12) and at least in sections are overlapped with the lateral guide rails (12). Slat blind (10) according to one of the preceding claims, wherein vertically adjacent slats are overlapped at least in sections.

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