EP3845736B1 - Locking device, venetian blind device and method of operating the locking device - Google Patents

Description

The invention relates to a locking device for a plurality of slats which are arranged together in a venetian blind device, a corresponding venetian blind device and a method for actuating the locking device for locking or unlocking the slats of such an external venetian blind device according to the invention.

It is known from the prior art to attach venetian blinds for sun and heat protection outside in front of windows; these venetian blinds are also referred to as venetian blinds (with slats that can be pushed together) and such slatted venetian blinds or slatted blinds are the subject matter of the invention. Such venetian blinds usually have ladder tapes for supporting, spacing and turning the slats and a lift tape for raising and lowering the slats. Appropriate drive and power transmission elements can be accommodated in a head rail, which can be attached to the wall by means of brackets and brackets. A lower rail forms the lower end of the plate pack. The slats of an external venetian blind can be manually operated using a lift belt or roller chain, or they can be raised and lowered electrically using the aforementioned drive.

The EP 1 118 746 A2 describes a slatted blind, the slats of which are guided with their ends in lateral rails by means of a slat carrier. To close the blind, the slats are individually removed from a slat pack arranged in an upper or lower area with the help of the slat carrier from below or above using the slat carrier and guided downwards or upwards. The drive device disclosed there has a revolving conveying element with recesses for receiving the disk carriers. Due to the fact that the slat carriers are fixed in the conveying element, the slats lifted from the stack are held in their position when the blind is partially or fully extended and cannot be displaced. The conveying element is therefore burglar-resistant, since it is not possible to open the blind by force without destroying it.

The U.S. 2,205,156 A discloses a roller blind that is designed to be burglar-proof. It has lockable slats for this purpose.

The U.S. 5,282,514 A discloses a blind that also has lockable slats.

Based on this prior art, it is an object of the present invention to provide a simplified locking device suitable for retrofitting, e.g. B. to provide burglar resistance for a Venetian blind with slats.

This object is achieved by a locking device having the features of claim 1.

The further object of providing a burglar-resistant venetian blind that can be secured against the slats being pushed up is achieved by the venetian blind device with the features of independent claim 9 .

A method for actuating a locking device in order to be able to prevent the slats from being pushed up to prevent burglary is disclosed by the features of claim 11 .

Further developments are set out in the respective dependent claims.

According to a first embodiment of a locking device according to the invention, which is designed to be arranged in a venetian blind device with a plurality of slats, each slat on both sides (slats usually have an elongated, rectangular shape and "both sides" here means terminally on the two short sides facing away from each other ) each has a slat holder parallel to a longitudinal axis of the slat with a sliding head and neck section, the invention provides that the locking device advantageously has a profile rail with an open long side and a plurality of recesses on one of the edges that delimit the open long side.

The profile rail can be transferred between an unlocked position and a locked position by a rotary movement about a longitudinal axis of the profile rail. In this case, in the unlocked position, the neck section of each slat extends through the open longitudinal side and each slat is guided in the profile rail with the sliding head and can be moved along the profile rail. In the locked position is the neck portion of each slat arranged in one of the recesses and each slat is arranged with the sliding head in the profile rail in a position determined by the respective recess along the profile rail immovably with respect to the rail longitudinal axis. "Unmovable" means here that the slat is simply temporarily locked against being pushed up or pulled out of the profile rail as long as the rail with the neck sections of the slat holder lying in the recesses grips the sliding heads in a blocking manner. A simple device advantageously prevents the slats from being undesirably pushed apart or upwards (in relation to a window on which the external venetian blind will be arranged during use) and an intruder could be granted access to the window. The locking device has an actuating element for triggering the rotational movement of the profile rail, which is preferably provided by an end section of the profile rail at a first end or which is formed by a first pin end piece which is non-rotatably connected to the profile rail at a first end of the profile rail, wherein the end section or the first pin end piece has a thread-like link groove which adjoins the open long side of the profile rail and which extends in a circumferential direction corresponding to the arrangement of the recesses on the profile rail and in which an actuating pin can be guided. This extends laterally from a lower rail of the external venetian blind device and can be moved in a positively guided manner on the lower rail in a slat plane defined by the majority of the slats, in which the longitudinal axes of the slats lie, so that the actuating pin guided in the link groove controls the rotary movement of the first pin end piece and thus the Profile rail triggers.

The expression "blade holder parallel to a longitudinal axis of the blade" refers herein to the orientation of the blade holder with respect to its neck portion, which defines a pivot axis for pivoting or turning movement of the respective blade and connects the sliding head to a holder portion on which the slat is attached. The pivot axis can be identical to the longitudinal axis of the blade if the neck portion of the blade holder is aligned with the axis of symmetry, ie the central longitudinal axis, of the blade, so that the expression "blade holder parallel to a longitudinal axis of the blade" means "blade holder aligned with the longitudinal axis of the blade". should include.

According to a further embodiment of the locking device according to the invention, it is provided that the spacing and the position of the recesses on the profile rail correspond to the spacing and the position of the slats in a fully extended state of the external venetian blind device. A "fully extended" blind is understood here to mean that position of the blind in which the lower rail is at its lowest position, i. H. at a maximum distance from the head rail and the slats of the external venetian blind thus occupy a maximum area.

The length and inclination of the link groove is suitably matched to the depth and spacing of the recesses, taking into account the location of the bottom rail in relation to the slats. The rotation can thus be performed by a predetermined angle in a range of, for example, approximately 40° to 90° (depending on the depth of the recesses, among other things).

According to yet another embodiment of the locking device according to the invention, it can have a securing element for the profile rail in the locking position. In one embodiment, in which the neck section of the slat holder defines a pivot axis for turning the slats between an open position, in which the surfaces of the slats are positioned parallel to one another, and a shading position, in which the surfaces of the slats lie next to one another, the securing element is formed at least one predetermined blade holder on at least one predetermined blade. The sliding head of this lamella holder designed as a securing element has a latching element which has a latching direction perpendicular to the surface of the lamella or to the surface of the lamella holder section. The latching element is designed as a kind of locking bar for engaging in a latching recess which is present on the profile rail at a predetermined circumferential position which is selected in relation to a circumferential position of that recess which is assigned to the predetermined lamella in such a way that engagement of the latching element in the Recess is provided when the profile rail is in the locked position and the slat in the shading position.

The burglar resistance already provided by the locking device in the lock can be effectively reinforced by the security element, which prevents the profile rail from twisting into the unlocked position. The formation of a blade holder as a securing element is structurally simple and does not require any additional drive or clutch components. When the slats are in the open position, e.g. B. for retracting and extending the slats, the locking element on the sliding head of the predetermined slat holder due to the locking direction perpendicular to the slat surface in the longitudinal direction of the profile rail, so that the extension and retraction of the slats is not prevented. Even during the transition to the locking position, for which the profile rail is rotated about its longitudinal axis so that the neck sections of the slat holders are received in the corresponding recesses, the slats are in the open position, so that the latching element still points in the longitudinal direction of the profile rail and the locking does not handicapped.

Securing is finally achieved by turning the slats into the shading position around the slat pivot axis, with the slat holders being rotated with the slats accordingly, so that the latching element on the sliding head of the predetermined slat holder in the shading position points in a radial direction of the profile rail perpendicular to the slat pivot axis and in can engage in the locking recess provided for this purpose on the profile rail. The positioning of the locking recess required for engagement with the locking element can be predetermined with the position of the locking element on the pivoted sliding head based on the assignment to the recess in which the predetermined blade holder is accommodated. The locking recess on the profile rail is preferably adapted to the width of the locking element in the circumferential direction, so that a rotary movement of the profile rail into the unlocked position is prevented.

In one embodiment, the latching element can be designed as an immovable projection on the sliding head, with the latching recess being dimensioned larger than the length of the latching element in the longitudinal direction of the profile rail, so that the latching element can be moved into and out of the latching recess by pivoting the lamellae without the locking element touches the inner wall of the profile rail when the sliding head rotates.

However, the latching element is preferably designed as a spring-loaded latching element which can be transferred from a latching position against the force of a spring element into a transfer position in which the latching element has at least partially penetrated the sliding head. The latching element can thus move back into the transfer position during the rotation of the sliding head when it comes into contact with the profile rail or the inner wall of the profile rail.

This also enables securing by engaging the latching element in a latching recess which is dimensioned to match the length of the latching element in the longitudinal direction of the profile rail. Because the spring-loaded locking element deviates when pressure is exerted on the locking element against the provided spring force in the transfer position in which the locking element z. B. can be aligned with the contour of the slider or at least does not protrude beyond this contour. For this purpose, a locking head of the locking element can be rounded on the sides, especially in the pivoting or rotational direction, so that when the sliding head rotates in the profile rail, a smooth transition is achieved when the locking element makes contact with the inner wall of the profile rail, as a result of which increasing pressure is exerted on the locking element is exerted against the spring force until the latching element is pushed back into the transfer position. Due to the spring force, the latching element can automatically penetrate into the latching recess when there is no longer any contact with the inner wall. Accordingly, unlocking takes place in that the detent element comes into contact with the profile rail with the rounded edges in the pivoting direction during the rotation of the sliding head with the profile rail, whereby the detent element is pressed against the spring force into the sliding head. With the turning of the slats into the open position, the corresponding rotation of the sliding head takes place, with the locking element returning to the locking position when the contact with the inner wall of the profile rail decreases or ceases.

Expediently, the predetermined slat has on both sides a slat holder designed as a securing element with the latching element on the sliding head for engagement in a corresponding latching recess on the respective profile rail. The predetermined slat can preferably be the uppermost slat of the plurality of slats arranged in the external venetian blind device, since the securing device is thus concealed behind an upper covering of the external venetian blind and manipulation of this slat is therefore the most difficult, if not impossible. However, several slats can also be predetermined to have slat holders designed as securing elements, each of which can engage with a latching element in a corresponding latching recess on the respective profile rail.

In an alternative embodiment of the locking device according to the invention, it can have a securing element for the profile rail in the locking position, which is formed by a second pin end piece which is non-rotatably connected to the profile rail at a second end of the profile rail and the one Has locking recess at a predetermined circumferential position. This latching recess is designed to engage with a latching bolt that can be moved between a latching position and a retracted position, the predetermined circumferential position of the latching recess being selected in relation to a circumferential position of the recesses on the profile rail in such a way that the latching bolt engages in the latching recess when the profile rail is in the locking position is present.

According to another embodiment of the locking device according to the invention, the locking bolt is in the locking position, acted upon by a compression spring, and the locking device has an unlocking device with which the locking bolt can be moved into the retracted position against the spring force of the compression spring.

Furthermore, an embodiment can provide that the profile rail has a polygonal or continuous, angular or rounded cross-sectional profile (square or polygonal, U-shaped or preferably circular arc-shaped C-profile), with the sliding head of the slat holder having a shape adapted to the selected cross-sectional profile is designed so that the sliding head present in the profile rail can be guided along the profile rail and can be rotated around the neck section. Additionally or alternatively, the sliding head is designed to engage behind the recess.

An embodiment of a venetian blind device according to the invention, which has a plurality of slats, a head rail, a bottom rail and lateral guide rails, with each slat having on both sides a slat holder parallel to or aligned with a longitudinal axis of the slat with a sliding head and neck section, which has a pivot axis for turning the slats between an open position, in which the surfaces of the slats are positioned parallel to one another, and a shading position, in which the surfaces of the slats lie side by side, and which extends through an open longitudinal side of the respective lateral guide rail for guiding the sliding head in the lateral guide rail , provides that the blind device comprises the locking device also according to the invention as claimed herein.

According to a further embodiment of the external venetian blind device according to the invention, at least one profile rail of the locking device is rotatably arranged in at least one of the lateral guide rails. For this purpose, the venetian blind device can, for example, have a head mount at the upper end and a bearing pedestal arrangement at the lower end have, with which the profile rail is rotatably mounted in relation to the lateral guide rail. In the unlocked position, the open longitudinal side of the profile rail points in the direction of the open side of the lateral guide rail, and in the locked position the profile rail with the recesses points in the direction of the open side of the lateral guide rail. Although it is conceivable for a locking device to be provided in only one guide rail, there is preferably a locking device in both lateral guide rails.

The locking device according to the invention for locking or unlocking a plurality of slats of an external venetian blind device can be operated according to a method also according to the invention, in that the profile rail is rotated into the unlocked position for unlocking, in which the open long side faces the slats, so that the neck section of each Slat extends through the open longitudinal side and each slat can move along the profile rail by guiding the sliding head in the profile rail. For locking, the profile rail is rotated into the locking position, taking the neck section of each slat in one of the recesses so that the sliding head engages behind the recess and each slat with the sliding head in the profile rail in a position determined by the respective recess along the profile rail is arranged immovably.

• zum Drehen der Profilschiene Führen eines Betätigungsstifts, der sich seitlich von einer Unterschiene der Raffstorevorrichtung erstreckt und der an der Unterschiene in einer durch die Mehrzahl der Lamellen definierten Lamellenebene, in der die Längsachsen der Lamellen liegen, zwangsgeführt bewegbar ist, in einer gewindeartigen Kulissennut. Diese schließt sich an die offene Längsseite der Profilschiene an und erstreckt sich in eine Richtung entsprechend der Anordnung der Ausnehmungen an der Profilschiene und liegt in einem Endabschnitt an einem ersten Ende der Profilschiene oder in einem ersten Zapfenendstück vor, das an einem ersten Ende der Profilschiene drehfest mit der Profilschiene verbunden ist. Dabei wird der Betätigungsstift
  1. a) zum Entriegeln aus der gewindeartigen Kulissennut in Richtung der offenen Längsseite der Profilschiene bewegt, sodass die Profilschiene in die Entriegelungsstellung gedreht wird, und
  2. b) zum Verriegeln aus der offenen Seite der Profilschiene in die gewindeartige Kulissennut bewegt, sodass die Profilschiene in die Verriegelungsstellung gedreht wird.

The method further includes the steps:

• for rotating the profile rail, guiding an actuating pin, which extends laterally from a lower rail of the external venetian blind device and which can be moved in a positively guided manner on the lower rail in a slat plane defined by the plurality of slats, in which the longitudinal axes of the slats lie, in a thread-like link groove. This connects to the open long side of the profile rail and extends in a direction corresponding to the arrangement of the recesses on the profile rail and is present in an end section at a first end of the profile rail or in a first pin end piece which is non-rotatably at a first end of the profile rail connected to the rail. The actuating pin
  1. a) moved for unlocking from the thread-like link groove in the direction of the open long side of the profile rail, so that the profile rail is rotated into the unlocked position, and
  2. b) moved from the open side of the profile rail into the thread-like link groove for locking, so that the profile rail is rotated into the locking position.

Alternatively or additionally, the method can include securing the locking position of the profile rail.

The locking position of the profile rail can preferably be secured by turning the slats from an open position, in which the surfaces of the slats are positioned parallel to one another, into a shading position, in which the surfaces of the slats lie next to one another. This is because a latching element, which on the sliding head of at least one slat holder predetermined as a securing element has a latching direction perpendicular to the surface of the slat on at least one predetermined slat, can engage with a latching recess which is on the profile rail at a predetermined circumferential position in relation to a circumferential position of the recess associated with the predetermined blade. The engagement of the latching element in the latching recess is thus provided when the profile rail is in the locking position and the slats are in the shading position.

Alternatively, securing can be accomplished by moving a detent pin from a retracted position to a detented position. In the latching position, the latching bolt engages with a latching recess, which is present at a circumferential position of a second pin end piece, which is predetermined in relation to a circumferential position of the recesses on the profile rail and is non-rotatably connected to the profile rail at a second end of the profile rail, so that the engagement of the Locking bolt is provided in the locking recess when the rail is in the locked position.

Other embodiments, as well as some of the advantages associated with these and other embodiments, will become apparent and better understood from the following detailed description with reference to the accompanying figures. Items or parts thereof that are substantially the same or similar may be given the same reference numbers. The figures are only a schematic representation of an embodiment of the invention.

Fig. 1

perspektivische Ansichten einer erfindungsgemäßen Verriegelungsvorrichtung in Entriegelungsstellung und Verriegelungsstellung,

Fig. 2

eine Querschnittansicht durch einen Raffstore in einer erfindungsgemäßen Ausführungsform in Verriegelungsstellung mit Angabe einer Längsschnittlinie B-B und zweier Detailausschnitte X1 und X2,

Fig. 3

in a) eine Querschnittansicht des Detailausschnitts X1 aus Fig. 2, der eine Ausführungsform eines Sicherungselements am oberen Ende der Profilschiene in Verriegelungsstellung zeigt, und in b) eine entsprechende perspektivische Ansicht,

Fig. 4

in a) eine Seitenschnittansicht durch Schnittlinie B-B aus Fig. 2 mit Angabe eines Detailausschnitts X3, in b) eine Seitenschnittansicht des Detailausschnitts X3 aus Fig. 4a, der eine Ausführungsform eines Betätigungselements am unteren Ende der Profilschiene in Verriegelungsstellung zeigt, in c) eine Querschnittansicht des Detailausschnitts X2 aus Fig. 2 und in d) eine entsprechende perspektivische Ansicht,

Fig. 5

eine Querschnittansicht durch einen Raffstore in einer erfindungsgemäßen Ausführungsform in Entriegelungsstellung mit Angabe einer Längsschnittlinie FF und zweier Detailausschnitte X7 und X8,

Fig. 6

in a) eine Querschnittansicht des Detailausschnitts X7 aus Fig. 5, der das Sicherungselement am oberen Ende der Profilschiene in Entriegelungsstellung zeigt, und in b) eine entsprechende perspektivische Ansicht,

Fig. 7

in a) eine Seitenschnittansicht durch Schnittlinie F-F aus Fig. 5 mit Angabe eines Detailausschnitts X9, in b) eine Seitenschnittansicht des Detailausschnitts X9 aus Fig. 7a, der das Betätigungselement am unteren Ende der Profilschiene in Entriegelungsstellung zeigt, in c) eine Querschnittansicht des Detailausschnitts X8 aus Fig. 5 und in d) eine entsprechende perspektivische Ansicht,

Fig. 8

eine perspektivische Explosionsansicht eines Raffstores in der erfindungsgemäßen Ausführungsform von Fig. 1 und 5,

Fig. 9

eine perspektivische Ansicht eines Raffstores in einer weiteren erfindungsgemäßen Ausführungsform mit in Offenposition hochgezogenen Lamellen sowie einen vergrößerten Detailausschnitt X10,

Fig. 10

eine perspektivische Ansicht eines als Sicherungselement ausgebildeten Lamellenhalters einer weiteren erfindungsgemäßen Ausführungsform,

Fig. 11

eine perspektivische Explosionsansicht des Lamellenhalters aus Fig. 10,

Fig. 12

in a) eine Seitenansicht des Lamellenhalters aus Fig. 10 mit dem Rastelement in Rastposition mit Angabe einer Querschnittlinie G-G, in b) eine Seitenteilschnittansicht mit dem Rastelement in Überführungsposition und in c) eine Querschnittansicht durch Schnittlinie G-G

Fig. 13

in a) eine perspektivische Ansicht des Raffstores aus Fig. 9 in vollständig ausgefahrenem Zustand/Verriegelungsstellung mit Lamellen in Offenposition und in b) eine Querschnittansicht des Raffstores aus Fig. 13a mit Angabe einer Längsschnittlinie H-H,

Fig. 14

in a) eine Seitenschnittansicht durch Schnittlinie H-H aus Fig. 13b mit Angabe eines Detailausschnitts X11, in b) eine Seitenschnittansicht des Detailausschnitts X11 aus Fig. 14a, der den als Sicherungselement ausgebildeten Lamellenhalter der obersten Lamelle in Offenstellung zeigt,

Fig. 15

in a) eine perspektivische Ansicht des Raffstores aus Fig. 13 mit Lamellen in Verschattungsposition und in b) eine Querschnittansicht des Raffstores aus Fig. 15a mit Angabe einer Längsschnittlinie I-I,

Fig. 16

in a) eine Seitenschnittansicht durch Schnittlinie I-I aus Fig. 15b mit Angabe eines Detailausschnitts X12, in b) eine Seitenschnittansicht des Detailausschnitts X12 aus Fig. 16a, der den als Sicherungselement ausgebildeten Lamellenhalter der obersten Lamelle in Verschattungsstellung zeigt,

Fig. 17

eine perspektivische Detailschnittansicht der Anordnung des als Sicherungselement ausgebildeten Lamellenhalters in der Profil- und seitlichen Führungsschiene des Raffstores in Verriegelungsstellung und den Lamellen in Verschattungsposition,

Fig. 18

eine perspektivische Detailansicht der Kopfhalterung und der Anordnung des als Sicherungselement ausgebildeten Lamellenhalters in der Profilschiene des Raffstores in Verriegelungsstellung mit Lamellen in Verschattungsposition,

Fig. 19

eine perspektivische Detailansicht der Profilschiene mit aufgenommenen Lamellenhaltern in Verriegelungsstellung und den Lamellen in Verschattungsposition,

Fig. 20

eine perspektivische Detailansicht der Anordnung der Unterschiene am Endabschnitt der Profilschiene in Verriegelungsstellung und den Lamellen in Verschattungsposition,

Fig. 21

eine Ansicht entsprechend Fig. 20 ohne Unterschiene und die beiden untersten Lamellen,

Fig. 22

eine Ansicht entsprechend Fig. 21 ohne Endkappe aus anderer Perspektive,

Fig. 23

eine perspektivische Seitenansicht der Anordnung des Kopfes des Betätigungsstifts auf einer Lagersockelanordnung,

Fig. 24

eine perspektivische Unteransicht auf die in der seitlichen Führungsschiene angeordnete Lagersockelanordnung.

show:

1

perspective views of a locking device according to the invention in the unlocked position and locked position,

2

a cross-sectional view through an external venetian blind in an embodiment according to the invention in the locked position with indication of a longitudinal section line BB and two detail sections X1 and X2,

3

in a) a cross-sectional view of the detail section X1 2 , which shows an embodiment of a securing element at the upper end of the profile rail in the locking position, and in b) a corresponding perspective view,

4

in a) a side sectional view through section line BB 2 with specification of a detail section X3, in b) a side sectional view of the detail section X3 Figure 4a , which shows an embodiment of an actuating element at the lower end of the profile rail in the locking position, in c) a cross-sectional view of detail X2 from FIG 2 and in d) a corresponding perspective view,

figure 5

a cross-sectional view through an external venetian blind in an embodiment according to the invention in the unlocked position, indicating a longitudinal section line FF and two detail sections X7 and X8,

6

in a) a cross-sectional view of detail X7 figure 5 , which shows the securing element at the upper end of the profile rail in the unlocked position, and in b) a corresponding perspective view,

7

in a) a side sectional view through section line FF figure 5 with specification of a detail section X9, in b) a side sectional view of the detail section X9 Figure 7a , which shows the actuating element at the lower end of the profile rail in the unlocked position, in c) a cross-sectional view of detail X8 figure 5 and in d) a corresponding perspective view,

8

12 is an exploded perspective view of a venetian blind in the embodiment of FIG 1 and 5 ,

9

a perspective view of a venetian blind in a further embodiment according to the invention with slats raised in the open position and an enlarged detail X10,

10

a perspective view of a lamella holder designed as a securing element of a further embodiment according to the invention,

11

an exploded perspective view of the blade holder 10 ,

12

in a) a side view of the blade holder 10 with the latching element in the latching position with indication of a cross-section line GG, in b) a partial side sectional view with the locking element in the transfer position and in c) a cross-sectional view through section line GG

13

in a) a perspective view of the external venetian blind 9 in the fully extended state/locked position with slats in the open position and in b) a cross-sectional view of the external venetian blind 13a with specification of a longitudinal section line HH,

14

in a) a side sectional view through section line HH Figure 13b with specification of a detail section X11, in b) a side sectional view of the detail section X11 14a , which shows the slat holder designed as a safety element for the top slat in the open position,

15

in a) a perspective view of the external venetian blind 13 with slats in the shading position and in b) a cross-sectional view of the external venetian blind Figure 15a with specification of a longitudinal section line II,

16

in a) a side sectional view through section line II Figure 15b with specification of a detail section X12, in b) a side sectional view of the detail section X12 16a , which shows the slat holder designed as a safety element for the top slat in the shading position,

17

a perspective detailed sectional view of the arrangement of the slat holder designed as a safety element in the profile and lateral guide rail of the external venetian blind in the locking position and the slats in the shading position,

18

a perspective detailed view of the head mount and the arrangement of the slat holder designed as a securing element in the profile rail of the external venetian blind in the locking position with slats in the shading position,

19

a detailed perspective view of the profile rail with recorded slat holders in the locking position and the slats in the shading position,

20

a detailed perspective view of the arrangement of the lower rail on the end section of the profile rail in the locking position and the slats in the shading position,

21

a view accordingly 20 without bottom rail and the two bottom slats,

22

a view accordingly 21 without end cap from another perspective,

23

a perspective side view of the arrangement of the head of the actuating pin on a bearing socket assembly,

24

a perspective view from below of the bearing base arrangement arranged in the lateral guide rail.

The device according to the invention relates to a locking device for preventing burglary in external venetian blind devices that have movable slats.

The locking device, which can be integrated into a venetian blind device, but can also be retrofitted into an existing venetian blind, can be actuated into an unlocked and a locked position. In the unlocked position the locking device allows the slats to be displaced and in the locked position the locking device blocks the slats so that they cannot be slid up without being destroyed, thus providing burglar resistance.

1 shows the principle of a locking device according to the invention using a slat 1 as an example, one side end of which is shown, to which a slat holder 2 is attached, which is used to guide the slat 1 laterally in an in 1 not shown lateral guide rail 5 is provided. Of course, each slat 1 has such a slat holder 2 on both side ends, such as e.g. in 2 and 5 can be seen, in which the lateral guide rails 5 of the venetian blind device 100 shown as an example can also be seen. The lamella holder 2 has a sliding head 2a, a neck section 2b and a holder section 2c at which the lamella holder 2 is connected to the lamella 1. According to the invention, the locking device has a profile rail 10 which has an open long side 11 and which is a C-profile rail 10 in the illustrated embodiment. A recess 12 can be seen on one of the edges that delimit the open longitudinal side 11, which is dimensioned such that the neck section 2b of the blade holder 2 can be arranged for locking in the recess 12 by rotating the profile rail 10 about its longitudinal axis (left representation in 1 ).

The sliding head 2a of the slat holder 2 engages behind this recess 12, so that the slat 2 cannot only be immovable in the longitudinal direction of the profile rail 10, but it is also not possible to pull the slat holder 2 out of the profile rail 10 in the longitudinal direction of the slat in order to release the blockage. Depending on the shape of the sliding head 2a can, as in the example of 1 to see, pivoting the slats 1 into a shading position can be useful for locking, in order to provide a more effective engagement of the sliding head 2a behind the recess 12. In principle, the pivoting of each slat of an external venetian blind between a shading and an open position is known, with the slats being positioned parallel to one another in an open position and thus being stackable to save space when raised, and in a shading position being next to one another, i.e. one of the individual slats, as is known created area to shade the window area behind. The pivot axis of each slat is defined by the neck section 2b of the slat holder.

To unlock, the profile rail 10 is rotated about its longitudinal axis in the opposite direction, so that the neck section 2b of the blade holder 2 transitions from the recess 12 to the open longitudinal side 11 (right illustration in Fig 1 ), in which the slat 1, now turned into the open position, can be moved in the longitudinal direction of the profile rail 10 by guiding the sliding head 2a.

The profile rail 10 of a locking device according to the invention usually has a plurality of recesses 12 which are formed on one of the edges which delimit the open longitudinal side 11, since external venetian blinds usually have a plurality of slats 1. Figures 2 to 8 show an example of a venetian blind device 100 according to the invention, which has a plurality of slats 1, of which the top one is designated. Figures 2 to 4 show the venetian blind device 100 or parts thereof in the locked position and Figures 5 to 7 in unlocked position.

The blind device 100 shown has, as usual, a head rail 3 with which the blind device 100 can be connected to a cover 8 by means of a head support 29 and fastening bracket 29' and in which drive and power transmission elements such as shaft 6, which is a square shaft 6 here, and tape reel bearings 7 are housed. Not shown are ladder belts for carrying, keeping your distance and turning the slats 1 and an elevator belt for raising and lowering the slats. The bottom end of the slats 1 is formed by a lower rail 4 which, like the slats 1, is guided in the lateral guide rails 5.

The Venetian blind device 100 has a profile rail 10 of a locking device according to the invention in each of the two lateral guide rails 5 , the number of recesses 12 in each profile rail 10 corresponding to the number of slats 1 . A distance between the recesses 12 and their positioning along the profile rail 10 corresponds to the distance and the positioning of the slats 1 or the slat holder 2 in a fully extended state of the external venetian blind device 100.

Since the external venetian blind device 100 is constructed mirror-symmetrically with two profile rails 10 in the two lateral guide rails 5, the locking device is described below using only one side. Of course, the explanations for the other side apply in a corresponding manner.

The profile rail 10 is rotatably arranged in the lateral guide rail 5 in such a way that the open longitudinal side 11 of the profile rail 10 in the unlocked position points in the direction of the open longitudinal side 5' of the lateral guide rail 5 (cf. Figure 7a ), so that the slats 1 can be moved along the open longitudinal sides 11, 5' of the profile rail 10 and the lateral guide rail 5. This is because the neck section 2b of the slat holder 2 extends from the sliding head 2a guided in the profile rail 10 through the open longitudinal sides 11, 5' of the profile rail 10 and the lateral guide rail 5.

By rotating it about its longitudinal axis by a predetermined angle, which depends, among other things, on the depth of the recesses 12 and can be in a range of 40° to 80°, for example, the profile rail 10 is transferred into the locking position in which the profile rail 10 with the Recesses 12 point in the direction of the open side 5' of the lateral guide rail 5 (cf. Figure 4a ). This means that the slats 1 can no longer be moved in the longitudinal direction of the profile rail 10 and the lateral guide rail 5 .

To explain further details of the locking device according to the invention, which is shown in the overall views of the venetian blind device 100 from 2 (locked position) and figure 5 (unlocked position) are not recognizable, in the following reference is primarily made to the corresponding detailed and sectional views in Figures 3 and 4 for the locked position and in figures 6 and 7 taken for the unlocked position.

4 and 7 each show an overall longitudinal sectional view a) of the external venetian blind device 100, as well as a detailed longitudinal sectional view b), detailed cross-sectional view c) and a perspective view b) of a first pin end piece 13 at the lower end of the profile rail 10, which is an actuating element of the locking device for triggering the rotary movement of the profile rail 10 represents.

For this purpose, the first pin end piece 13 is non-rotatably connected to the profile rail 10 in order to transmit the rotary actuation to the profile rail 10, and is mounted in a cover 20 which closes the lower end of the lateral guide rail 5 (cf. 8 ), wherein the trunnion end piece 13 forms a bearing socket assembly 400 with the cover 20. The spigot end 13 has a thread-like link groove 13', which connects to the open side 11 of the profile rail 10, which is particularly good in Figure 7d you can see. An actuating pin 14, which is fixed laterally in the bottom rail 4 of the venetian blind device 100, is guided in the thread-like link groove 13', which extends in a circumferential direction corresponding to the arrangement of the recesses 12 on the profile rail 10. In the example shown, the lateral ends of the bottom rail 4 have a cap 28 in which the actuating pin 14 is fastened by means of a threaded pin 28'. Of course, an actuating pin can also be attached to the lower rail in a different way. Furthermore, it can also be provided that the cap and the actuating pin can be designed in one piece, etc.

The bottom rail 4 and thus the actuating pin 14 is positively guided in a slat plane defined by the slats 1, in which the longitudinal axes of the slats 1 lie, so that the pin end piece 13 - and thus the connected profile rail 10 - by guiding the actuating pin 14 in the thread-like Link groove 13' is rotated accordingly. For locking, the actuating pin 14 is moved out of the open side 11 of the profile rail 10 into the thread-like link groove 13' to an end position, with the profile rail 10 moving into the locking position ( 4 ) is rotated. In the end position, the actuating pin 14 has reached the closed end of the thread-like connecting link groove 13' and the external venetian blind is fully extended. In a motor-driven blind device 100, the end position can be determined by a setting of the motor by the motor for extending the blind, z. B. after a predetermined time is stopped. This time is then coordinated with the fact that the external venetian blind is then fully extended, and the bottom rail 4 has reached the lowest position and corresponding to the actuating pin the end of the link groove 13 ', so that the Profile rail 10 is rotated into the locking position when the lower rail 4 reaches the lowest position. Conversely, the profile rail 10 is moved into the unlocked position ( 7 ) rotated by the actuating pin 14 is moved from the end position through the thread-like link groove 13 'in the direction of the open side 11 of the profile rail 10. The length and inclination of the link groove 13' determine the angle of rotation of the profile rail 10 and are matched to a depth and a spacing of the recesses 12, taking into account the relative arrangement of the lower rail 4 in relation to the slats 1.

In Figures 4a, 4b (as well as 7a, 7b ) and also in 8 It can also be seen that the lateral guide rail 5 has a side profile 50 for receiving mounting elements 26 for fastening the external venetian blind device 100 and on the edges that delimit the open longitudinal side 5' of the lateral guide rail 5, two guide profiles 50', in each of which a Guide bar 27 is added.

3 and 6 each show a sectional view a) and a perspective view b) of a securing element of the locking device in order to keep the profile rail 10 in the locking position ( 3 ) to secure. In the example shown, the securing element has a second pin end piece 15, which is connected to the upper end of the rail 10 in a torque-proof manner with the rail 10 and is mounted in a cover 20 by means of a lock 20', which closes the lateral guide rail 5 at the upper end, wherein the second pivot end piece 15 and the cover 20 form a head mount 300 (cf. 8 ). The pin end piece 15 has a latching recess 15 ′ at a circumferential position which corresponds to that of the recesses 12 on the profile rail 10 . A locking bolt 16 is provided in a corresponding arrangement in the head rail 3 for engagement with the locking recess 15' when the profile rail 10 is arranged in the locking position. The locking bolt 16 is mounted in a sleeve 18 within a bearing housing 21 in the upper rail 3 and is preloaded against the upper pin end piece 15 by a compression spring 17 arranged in the sleeve 18 and fixed with a threaded pin 19, so that the locking bolt 16 as a result of the Prestressing is driven by the compression spring 17 into the locking recess 15' when the pin end piece 15 assumes the locking position with the profile rail 10 ( 3 ).

To unlock the locking bolt 16, a connection via a clutch to a driver 9 is provided, which is arranged on the square shaft 6. The clutch has a clutch disk 23 on the bearing housing side and a clutch disk 24 on the driver side, which are connected to the bearing housing 21 via a fitting screw and nut 22 . Compression springs 17' between the clutch disks 23, 24 ensure that the clutch disk 24 on the driver side is prestressed against the driver 9, which in the example shown has two guide grooves 9' (cf. 8 ) with a corresponding depth profile, in which two pins 25 are guided, which extend from the clutch disc 24 on the driver side. In locked position ( Figure 3a ) the pins 25 are located at the point with the smallest depth of the guide grooves 9', so that the sleeve 18, the disk-shaped head of which is guided in a circumferential groove 24' of the clutch disk 24 on the driver side, is in an advanced position in which an engagement of the locking bolt 16 with the recess 15 'is possible.

The unlocking ( 6 ) of the security element takes place at the beginning of the raising of the external venetian blind, in that the driver 9 is rotated by rotating the square shaft 6 in such a way that the pins 25 are present at the point of greatest depth of the guide grooves 9 ′ ( Figure 6a ) so that the driver-side clutch disc 24 is spaced from the clutch disc 23 and the sleeve 18, which follows the movement of the driver-side clutch disc 24, and thus the detent pin 16 are in a retracted position which disengages the detent pin 16 from the detent recess 15' , so that the profile rail 10 can be rotated (by raising the lower rail 4) for unlocking.

Contrary to what is shown, a locking recess could also be in a different circumferential position if a locking bolt is provided elsewhere, as long as the predetermined circumferential position of the locking recess is selected in relation to the circumferential position of the recesses on the profile rail in such a way that the engagement of the locking bolt in the locking recess is provided when the rail is in the locked position.

In the example described, locking and unlocking, together with locking and unlocking, take place automatically with motor-controlled full extension and raising of the venetian blind. Manual actuation for turning the profile rail and for securing by means of locking bolts can of course also be provided.

Further embodiments of an external venetian blind 100 according to the invention, which has an alternative actuating element for triggering the rotary movement of the profile rail, are described with reference to the examples in FIGS. 9 to 26 . In addition, the external venetian blind 100 shown there has an alternative security element which, unlike the security with the security bolt according to FIG 3 and 6 to release the fuse does not require a complex connection via a coupling to a driver.

9 shows an external venetian blind 100 with slats 1, 1′ in the raised state, in which the slats 1, 1′ are in the open position as a stack in the region of the head rail 3 and are at least partially covered by the cladding 8. For the sake of a better overview, only one of the same type of elements is designated, such as e.g. B. head carrier 29, mounting bracket 29 'and bracket 26. Also from the slat stack, which is closed at the bottom by the bottom rail 4, only the top slat 1' and any other slat 1 are designated. For a better view of the slat holder 2, in particular in detail X10, only one guide bar 27 is shown on the left side of the external venetian blind 100, which together with another guide bar 27 forms a boundary on both sides for guiding the slat holder 2, 2' along the lateral guide rail 5 (see. 17 ), which has a corresponding guide profile 50' on both sides of the longitudinal opening 5' for receiving the guide strips 27.

Detail X10 illustrates an embodiment of the blade holder 2, in which the sliding head 2a is designed as a disc with an elongated crescent shape, which is defined by two parallel linear side sections and two parallel arc sections. This shape of the sliding head 2a allows on the one hand a close stacking of the slats 1 in the open position and on the other hand a rotation of the head section 2a around the neck section 2b within the profile rail 10, not shown here, for turning the slats 1 in the extended state into the shading position. In addition, the elongated crescent-shaped sliding head 2a provides the effective gripping behind the recess 12 in the profile rail 10 (cf. e.g. 19 , 22 ). The actuating pin 14 accommodated in the end cap 28 of the lower rail 4 can also be seen in the detail section X10, the head section 140 of which has a spherical shape that is flattened at the top and bottom. With that can the head section 140 of the actuating pin 14 can also be guided in the profile rail 10 in order to bring about the rotary movement of the profile rail 10 when it enters the link groove 13' at the lower end. In the fully extended locking position, the head portion 140 of the actuator pin 14 is positioned above the bearing pedestal assembly 400 located on the left side of the venetian blind 100 in FIG 9 can be seen and below in connection with Figures 20 to 24 will be described in more detail. In the 9 at the upper end of the lateral guide rail 5 to be seen on the right head mount 300 is associated with figures 14 , 16 and 18 described in more detail.

in the in 9 In the example shown, the uppermost slat 1' is intended to have a slat holder 2' designed as a securing element on both sides--hereinafter also referred to as a securing slat holder--for which an exemplary embodiment is shown in FIG 10, 11 and 12 is shown. Like a "normal" slat holder 2, the securing slat holder 2' has a holder section 2c, to which the slat 1' is attached, and a neck section 2b, which extends between the guide rails 27 through the open longitudinal sides 5', 11 of the guide rail 5 and the profile rail 10 and is arranged in the locking position of a corresponding recess 12, 12'.

The sliding head 2a' of the fuse blade holder 2' is, as in Figures 10 to 12 can be seen, is approximately spherical and has a latching element 210 which is held by a spring element 211 in a latching position ( Figures 10, 12a and 12c ) is held, in which the latching element 210 protrudes beyond the contour of the sliding head 2a' in a latching direction which is perpendicular to the plane defined by the surface of the holder section 2c. The latching element 210 has a latching head 215 with rounded edges, two hook elements 216 extending from the rear side of which, on which the spring element 211 rests, in order to engage behind a shoulder 213 in the receiving opening 212 of the sliding head 2a' and thus hold the latching element 210 against the To keep spring pressure in the receiving opening 212. For the spring element 211, which is flanked by the hook elements 216, the sliding head 2a' has a bearing surface 214 in the receiving opening 212, from which a section 212' of the receiving opening 212 extends on both sides as a displacement path for the hook elements 216, so that the hook elements 216 enter these sections 212' when pressure is applied to the latch head 215 and latch member 210 is pushed into the sliding head 2a' against the spring force (transfer position, Figure 12b ).

13a and b show the external venetian blind 100 9 after actuation of the tape reel bearings 7 in the almost fully extended state of the slats 1, 1', the slats 1, 1' being in the open position in which the surfaces of the slats 1, 1' are positioned parallel to one another. Also here the uppermost blade 1' is the predetermined blade 1', which is equipped with fuse blade holders 2'. When the actuating pin 14 on the lower rail 4 approaches the bearing base arrangement 400, with the actuating pin 14 entering the link groove 13', the professional rail 10 is transferred to the locking position, in which the neck sections 2b of the blade holders 2, 2' move through the recesses 12, 12', as in Figures 18 to 22 with slats 1, 1' is shown in the shading position.

A design of the head mount 300 for mounting the rotatable profile rail 10 at the upper end and an arrangement of the safety blade holder 2 'is in 14a and b illustrates, which is a side sectional view HH of the in Figure 13b blinds 100 shown and a detailed view X11 of the upper portion of the locking device within the panel 8 show. The head mount 300 comprises a receiving plug 301, which encompasses the upper end of the profile rail 10, and a profile receiving element 302, which encompasses the upper end of the lateral guide rail 5 including the side profile 50 and (here by means of connecting pins 306 and nuts 306') with a terminating top Holder plate 303 is connected. The receiving plug 301 is rotatably mounted with a bolt 304 in the profile receiving element 302 and secured by a securing element 305 , the assembly of which is made possible by a correspondingly positioned assembly opening 307 in the holder plate 303 . Modifications of the example shown with the head mount 300 are of course conceivable in order to mount the profile rail 10 rotatably in the lateral guide rail 5 .

The recesses 12, 12' on the profile rail 10, through which the neck sections 2b of the blade holders 2, 2' extend, cannot be seen here and are in front of the plane of the drawing. The locking recess 120 is offset by approximately 90° in relation to the recess 12', which is assigned to the predetermined blade 1' with the fuse blade holder 2' (cf. 18 ), so that the sliding head 2a 'level with the recess 120 is when the neck portion 2b of the fuse blade holder 2' is received in the recess 12'. With the slats 1, 1' in the open position during the extension and retraction of the slats 1, 1', the locking element 210 of the sliding head 2a' of the safety slat holder 2' points in the longitudinal direction of the profile rail 10 and is therefore in the unloaded locking position, so that the Guidance of the sliding head 2a 'along the rail 10 and the transfer into the locking position by rotation of the rail 10 are not affected.

To secure the locking position, the slats 1, 1' are turned into the shading position, which in Figure 15a and b , in which the surfaces of the lamellae 1, 1' are essentially next to one another, with the lamellae being able to be present slightly overlapping and forming a closed or almost closed surface as it were. Apart from the shading position, the representations differ in 15a,b from Figures 13a and b in that the slats 1, 1' are now fully extended so that the locking position is present. The side sectional view II of the in Figure 15b Venetian blinds shown 100 in 16 a and the detail view X12 in Figure 16b from the depictions in 14a and b in the position of the lamella holder 2, 2' and the actuating pin 14 along the profile rail 10 and the rotational position of the lamella holder 2, 2'.

Since the slat holders 2, 2' are rotated with the turning of the slats 1, 1' in the shading position around the pivot axis defined by the neck section 2b, the rotational position of the sliding heads 2a, 2a' within the profile rail 10 also changes. The rotation angle of the sliding heads 2a, 2a' in the profile rail 10 is approximately 90° C., corresponding to the turning movement of the slats 1, 1' between the open and shading positions. The latching element 210 on the sliding head 2a' of the fuse blade holder 2' then points in the shading position in a radial direction of the profile rail 10 and thus extends through the correspondingly arranged latching recess 120.

Advantageously, the spherically designed sliding head 2a' of the safety blade holder 2' is positively accommodated in the arcuate cross section of the profile rail 10, so that the correct engagement of the locking element 210 with the locking recess 120 in the profile rail 10 is also ensured when weather-related thermal expansions or contractions occur of the fuse lamella 1' occur in the longitudinal direction would. In order to avoid mechanical stresses being generated as a result of thermal expansion or contraction of the lamella 1' as a result of the play-free arrangement of the spherical sliding head 2a' in the profile rail in the safety lamella 1', a compensation element or compensator can be installed in the safety lamella 1'. and/or the blade holder 2' or as a fastening element between the holder section 2c and the securing blade 1'. In the case of the other slats 1, mechanical stresses as a result of thermal expansion or shrinkage are prevented by the disk-shaped sliding head 2a having sufficient play within the profile rail 10.

The width of the latching recess 120 (extension along the circumference of the profile rail 10) is adapted to the latching element 210 (cf. 18 ), so that the profile rail is prevented from rotating about its longitudinal axis as long as the latching element 210 is engaged in the latching recess 120. The length of the locking recess 120, on the other hand, can be selected to be significantly larger than the dimensions of the locking element 210 require, so that the locking element 210 does not have to be pressed against the spring force in order to move the sliding head 2a' when the slats 1, 1 '(And vice versa) to rotate in the rail 10. If a latching recess is dimensioned in terms of its longitudinal extent in such a way that it is not necessary to press in the latching element to rotate the sliding head, since the length of the latching recess means that there is no contact with the inner rail wall, the latching element can, in contrast to what is shown, simply be used as an immovable locking projection be formed on the sliding head.

With the spring-loaded latching element 210, in particular with the rounded edges on the latching head 215, however, an embodiment of the latching recess 120, not shown here, is also permitted, which corresponds to the dimensions of the latching element 210 or has only a slightly larger longitudinal extent. This is because the rounded edges of the locking head 215 allow the locking element 210 to move back against the spring pressure when the sliding head 2a' rotates due to the contact of the locking element 210 on the inner wall of the profile rail 10. This contact causes sufficient pressure on the locking element 210 against the force of the spring element 211 , to hold the latching element 210 in the transfer position.

In 17 is a part of the external venetian blind 100 Figure 15a with lateral guide rail 5 and profile rail 10 and the slat holders 2, 2' of the slats 1, 1' guided therein Shading position shown. The guidance of the neck sections 2b of the slat holders 2.2' by the two guide rails 27, which are accommodated with a profile section in the guide profiles 50' on both sides of the open long side 5' of the lateral guide rail 5, is clearly visible. The profile rail 10 is in the locking position, so that it is not the open longitudinal side 11 of the profile rail 10 but the recesses 12, 12' adjoining one edge there (cf. 19 ) point to the open long side 5' of the lateral guide rail 5, so that the neck sections 2b of the blade holders 2, 2' are received in the respective recess. Due to the shading position of the slats 1, 1', the latching element 210 on the sliding head 2a' of the securing slat holder 2', which is assigned to the topmost slat 1', points in a radial direction of the profile rail 10 perpendicular to the slat plane and extends through the latching recess 120 , which is present in the profile rail 10 at the corresponding position, as in 18 is shown, which dispenses with the representation of the lateral guide rail 5 and the front guide rail 27 .

Furthermore, in 18 the headgear 300 shown in connection with 14 has already been described. Unlike there, it can be seen here that the holder plate 303 extends in the direction of the head rail 3 and has elongated holes 307' for attachment thereto. Of course, alternative fastening variants can also be provided for this.

Figures 20 to 22 illustrate the alternative design of the actuating element for triggering the rotary movement of the profile rail 10 for transfer to the illustrated locking position by means of the actuating pin 14 guided in the twisted link groove 13', which is accommodated with an end cap section in the end cap 28 of the lower rail 4. In contrast to the example in Figures 1 to 8 the link groove 13' is not present in a pin end piece 13 which is connected to the profile rail 10, but is worked out in an end section 130 of the profile rail 10 and is therefore manufactured in one piece. But here, too, the thread-like link groove 13' extends from the open long side 11 of the profile rail 10 in a circumferential direction corresponding to the arrangement of the recesses 12, 12', with the length and inclination of the link groove 13' determining the angle of rotation of the profile rail 10 and to a depth and a spacing of the recesses 12, 12', taking into account the relative arrangement of the lower rail 4 in relation to the slats 1.

The fact that the bottom slat 1 and thus the bottom slat holder 2 are not fully pivoted results from the given distance to the bottom rail 4, through which the bottom slat 1 rests on the bottom rail 4, which is not turned, before the complete turning of the bottom slat 1 has been rotated by 90°C. However, this should still be understood as a shading position, since the bottom slat 1 that is not completely turned also contributes to a closed overall slat surface that provides the shading. Of course, this should also include variants that allow the bottom slat to be turned completely by 90° into the shading position when the bottom rail is arranged differently and the link groove is designed in a different way when it is fully extended.

In 20 the bearing base arrangement 400 is shown at the lower end section 130 of the profile rail 10, which is shown in 22 and 23 can be seen in more detail. The bearing pedestal assembly 400 in the illustrated example has a stopper 401 which is disposed in the lateral guide rail 5 closing the lower end, as shown in FIG 24 is made clear. The stopper 401 has a cross section based on a rectangular shape which, corresponding to the inner profile of the lateral guide rail 5, has a rear groove 401c, which encloses a longitudinal rib (not labeled) on the inside of the guide rail 5 pointing to the open longitudinal side 5', and a front shoulder 401b, which extends into the open longitudinal side 5' of the lateral guide rail 5. In the example shown, fastening also takes place there by means of a fastening element 401d. Lateral notches 401a allow the stopper 401 to be gripped, for example for disassembly or repair. In a modification that is not shown, such a stopper can have profiled longitudinal grooves on both sides of shoulder 401b for receiving a section of the guide rails 27 accommodated in the guide profile 50', which, as in FIG 17 can be seen, extends into the interior of the guide rail 5 . However, the guide rails 27 can also end above the bearing base arrangement 400 .

On the stopper 401 is, as in 23 1, a bearing element 402 is fastened with a cylinder pin 403 which is arranged centrally in relation to the profile rail 10 and on which a plug 404 is rotatably arranged, which has a hollow-cylindrical section 407 for accommodation in the profile rail 10. The hollow cylinder section 407 is through a formed cylindrical body having a centrally arranged cavity for receiving the cylindrical pin 403. Otherwise, the hollow cylinder section 407 can be solid or have additional cavities that can be provided, for example, to compensate for imbalance. Such an imbalance can be caused, for example, by positive-locking elements 405 on the circumference of the hollow cylinder section 407, of which the plug 404 shown here has two. When the plug 404 is arranged in the profile rail 10, the form-fitting elements 405 engage with correspondingly shaped form-fitting recesses 13" on the profile rail 10 and thus provide a non-rotatable connection of the profile rail 10 with the plug 404. Deviating from the example shown, only one form-fitting element or more than two form-fitting elements can be provided.Alternatively, the non-rotatable connection of the plug 404 to the profile rail 10 can be produced by a connection technique that is alternative to the form-fitting connection, for example by a non-positive clamping or screw connection or a material-to-material bonded or welded connection.

A cone section 406 adjoins the hollow cylinder section 407 of the plug 404, the head section 140 of the actuating pin 14 being positioned above the cone section 406 when the external venetian blind 100 is in the fully extended state. The head section 140, the top and bottom of which is flattened or arched here, does not touch the cone section 406. If the travel path in the guide groove 13' is longer, the head section 140 could be designed differently from the example shown, for example also spherical. The cone section 406 has the function of allowing water that may be in the profile rail 10 to flow off downwards, in that the cavities in the plug 404 are designed as through-holes that extend through the hollow cylinder section and the cone section. This prevents water from accumulating in the profile rail 10 and from freezing in winter.

Similar to the slat holder 2, 2', the actuating pin 14 has, in addition to the head section 140, which is designed for guidance in the profile rail 10, a neck section 141 which, depending on the extended position of the external venetian blind, extends through the connecting link groove 13' or the open longitudinal sides 5'. , 11 of the guide or profile rail 5, 10 extends. The end cap portion 142 of the actuator pin 14 is contoured for receipt within the end cap 28 .

Of course, embodiments that deviate from the illustrated and described examples for the bearing base arrangement and actuating pin are conceivable, which fulfill the same task and function.

Furthermore, the scope of protection is not limited to the examples in their illustrated and described embodiments; because a venetian blind according to the invention can also arbitrarily combine the different detailed solutions regarding the operating elements and the safety elements from the examples described and/or have modifications of the indicated constructive details that have the same function and effect, while remaining within the scope of protection of the appended claims

Furthermore, in addition to the uppermost slat, other slats and more than one slat can also be equipped with the slat holders designed as securing elements. Although not preferred, solutions are also included in which a predetermined lamella is only equipped with a safety element on one side. Of course, a locking device according to the invention can also have a profile rail with a profile deviating from a C-profile, which can be round, square or rounded corners. It is only important that the profile rail can be rotated by the predetermined angle about its longitudinal axis when arranged in the lateral guide rail, and that the sliding head of the slat holder can be moved along the profile rail and rotated about the pivot axis. Profiles are preferred in which the width of the open long side is narrower than the profile width, so that the sliding head guided in the profile rail cannot be pulled out through the open long side. In order to allow the sliding head to be guided and rotated in the profile rail, the sliding head can be designed to match the profile of the profile rail, with a venetian blind being able to have different sliding heads, for example when a slat holder is designed as a securing element with a locking element.

REFERENCE LIST

1, 1'

Slat, predetermined slat

2, 2a, 2b, 2c

Slat holder, sliding head, neck section, holder section

2', 2a'

Fuse blade holder, locking sliding head

3

head rail

4

bottom rail

5, 5'

lateral guide rail, open long side

6

square shaft

7

tape reel storage

8th

disguise

9, 9'

Driver, guide groove

10

profile rail

11

open long side

12, 12'

recess

13

Pin end actuation

13'

link groove

13"

interlocking recess

14

actuating pin

15, 15'

Pin end piece securing, locking recess

16

detent bolt

17, 17'

compression spring (locking pin), compression spring (clutch)

18

sleeve

19

grub screw

20, 20'

cover, lock washer

21

bearing housing

22

fitted screw/nut

23

clutch disc

24, 24'

Clutch disc on driver side, circumferential groove

25

Pen

26

bracket

27

guide bar

28, 28'

cap, threaded pin

29, 29'

Head carrier, mounting bracket

50, 50`

side profile, guide profile

100

venetian blind device

120

recess

130

End section of the profile rail

140

head section

141

neck section

142

end cap section

210

locking element

211

Resilient pressure piece

212, 212'

receiving opening, opening section

213

Unit volume

214

In stock

215

locking head

216

hook element

300

head mount

301

receiving plug

302

profile receiving element

303

holder plate

304

bolt

305

fuse element

306, 306'

connecting pin, nut

307, 307'

opening, slotted hole

400

bearing socket

401

stopper

401a,b,c,d

Notch, shoulder, groove, fastener

402

storage element

403

straight pin

404

Plug

405

interlocking element

406

cone section

407

hollow cylinder section

Claims (13)

1. A locking device formed for arrangement in a venetian blind device (100), which has a plurality of lamellae (1, 1'), wherein each lamella (1, 1') has, on both sides, a respective lamella bracket (2, 2') parallel to a longitudinal axis of the lamella (1, 1') comprising sliding head (2a, 2a') and neck portion (2b), and wherein the locking device has a profile rail (10), which

   - has an open longitudinal side (11) and a plurality of recesses (12, 12') on one of the edges, which limit the open longitudinal side (11), and which

   - can be transferred between an unlocked position and a locked position by means of a rotational movement about a longitudinal axis of the profile rail (10), wherein

   - in the unlocked position, the neck portion (2b) of each lamella (1, 1') extends through the open longitudinal side (11) and each lamella (1, 1') is movable along the profile rail (10), guided with the sliding head (2a, 2a') in the profile rail (10), and

   - in the locked position, the neck portion (2b) of each lamella (1, 1') is arranged in a respective one of the recesses (12, 12'), and each lamella (1, 1') is immovably arranged along the profile rail (10) with the sliding head (2a, 2') in the profile rail (10) in a position determined by the respective recess (12, 12'),
   wherein

   the locking device has an actuating element for triggering the rotational movement of the profile rail (10), which is preferably provided by an end portion (130) of the profile rail (10) on a first end or which is formed by a first journal end piece (13), which is connected in a rotationally fixed manner to the profile rail (10) on a first end of the profile rail (10),

   characterised in that the end portion (130) or the first journal end piece (13) has a thread-like cam groove (13'),

   - which adjoins the open longitudinal side (11) of the profile rail (10) and

   - extends in a circumferential direction corresponding to the arrangement of the recesses (12, 12') on the profile rail (10) and

   - in which an actuating pin (14) can be guided, which extends laterally from a bottom rail (4) of the venetian blind device (100) and which is movable in a positively driven manner on the bottom rail (4) in a lamella plane, which is defined by the plurality of the lamellae (1, 1') and in which the longitudinal axes of the lamellae (1, 1') lie, so that the actuating pin (14) guided in the cam groove (13') triggers the rotational movement of the first journal end piece (13) and thus of the profile rail (10).
2. The locking device according to claim 1,
   characterised in that
   a distance and a position of the recesses (12, 12') on the profile rail (10) correspond to a distance and a position of the lamellae (1, 1') in a completely extended state of the venetian blind device (100).
3. The locking device according to at least any one of claims 1 or 2,
   characterised in that

   the locking device has a securing element for securing the profile rail (10) in the locked position, and

   the neck portion (2b) of the lamella bracket (2, 2') defines a pivot axis for turning the lamellae (1, 1') between an open position, in which the surfaces of the lamellae (1, 1') are positioned parallel to one another, and a shading position, in which the surfaces of the lamellae (1, 1') are located next to one another.
4. The locking device according to claim 3,
   characterised in that
   the securing element is formed by at least one predetermined lamella bracket (2') of at least one predetermined lamella (1'), the sliding head (2a') of which has a latching element (210), which has a latching direction perpendicular to the surface of the lamella (1') and is formed for engagement with a latching recess (120), which is present on the profile rail (10) at a predetermined circumferential position, which is selected in such a way with respect to a circumferential position of the recess (12'), which is assigned to the predetermined lamella (1') that an engagement of the latching element (210) with the latching recess (120) is provided when the profile rail (10) is present in the locked position and the lamella (1') in the shading position.
5. The locking device according to claim 4,
   characterised in that

   the latching element (210) is a spring-loaded latching element (210), which can be transferred from a latched position against the force of a spring element (211) into a transfer position, in which the latching element (210) is present having penetrated at least partially into the sliding head (2a'),
   and/or

   the predetermined lamella (1') has, on both sides, a respective lamella holder (2') comprising the spring-loaded latching element (210) on the sliding head (2a') for engagement with the latching recess (120) on the respective profile rail (10), wherein the predetermined lamella (1') is preferably the uppermost lamella (1') of the plurality of lamellae (1, 1') arranged in the venetian blind device (100).
6. The locking device according to at least any one of the preceding claims,
   characterised in that
   the locking device has a securing element for securing the profile rail (10) in the locked position, wherein the securing element is formed by a second journal end piece (15), which is connected in a rotationally fixed manner to the profile rail (10) on a second end of the profile rail (10) and has a latching recess (15') at a predetermined circumferential position, wherein the latching recess (15') is formed for engagement with a latching bolt (16), which is movable between a latched position and a retracted position, and wherein the predetermined circumferential position of the latching recess (15') is selected in such a way with respect to a circumferential position of the recesses (12) on the profile rail (10) that the engagement of the latching bolt (16) with the latching recess (15') is provided when the profile rail (10) is present in the locked position.
7. The locking device according to claim 6,
   characterised in that
   the latching bolt (16) is present in the latched position so as to be acted on by a pressure spring (17), and the locking device has a release device, by means of which the latching bolt (16) is movable into the retracted position against the spring force of the pressure spring (17).
8. The locking device according to at least any one of claims 1 to 7,
   characterised in that

   the profile rail (10) has a polygonal or continuous, angular, or rounded cross-sectional profile, which is preferably a C-profile, wherein the sliding head (2a, 2a') of the lamella bracket (2, 2') is formed with a shape, which is suitably adapted for the selected cross-sectional profile, so that the sliding head (2a, 2a'), which is present in the profile rail (10), can be guided along the profile rail (10) and can be rotated about the neck portion (2b),
   and/or

   the sliding head (2a, 2a') is formed for engaging behind the recess (12).
9. A venetian blind device (100), which has a plurality of lamellae (1, 1'), a head rail (3), a bottom rail (4), and lateral guide rails (5), wherein each lamella (1, 1') has, on both sides, a respective lamella bracket (2, 2') parallel to a longitudinal axis of the lamella (1, 1') or aligned therewith comprising sliding head (2a, 2a') and neck portion (2b), which

   - defines a pivot axis for turning the lamellae (1, 1') between an open position, in which the surfaces of the lamellae (1, 1') are positioned parallel to one another, and a shading position, in which the surfaces of the lamellae (1, 1') are located next to one another, and

   - extends through an open longitudinal side (5') of the respective lateral guide rail (5) for guiding the sliding head (2a, 2a') in the lateral guide rail (5), wherein the venetian blind device (100) has a locking device,

   characterised in that
   the locking device is a locking device according to at least any one of claims 1 to 8.
10. The venetian blind device (100) according to claim 9,
    characterised in that

    at least one profile rail (10) of the locking device is rotatably arranged in at least one of the lateral guide rails (5), wherein

    - in the unlocked position, the open longitudinal side (11) of the profile rail (10) points in the direction of the open longitudinal side (5') of the lateral guide rail (5),
    and

    - in the locked position, the profile rail (10) points with the recesses (12, 12') in the direction of the open longitudinal side (5') of the lateral guide rail (5),

    wherein the venetian blind device (100) preferably has a head bracket (300) for rotatably supporting the profile rail (5) on the upper end with respect to the lateral guide rail (5), and a bearing pedestal arrangement (400) for rotatably supporting the profile rail (5) on the lower end with respect to the lateral guide rail (5).
11. A method for actuating a locking device according to at least any one of claims 1 to 8 for locking or unlocking a plurality of lamellae (1, 1') of a venetian blind device (100) according to claim 9 or 10,
    comprising the steps of

    - for unlocking purposes, rotating the profile rail (10) into the unlocked position, in which the open longitudinal side (11) points to the lamellae (1), so that the neck portion (2b) of each lamella (1, 1') extends through the open longitudinal side (11) and a moving of each lamella (1, 1') is permitted by guiding the sliding head (2a, 2a') along the profile rail (10) in the profile rail (10),
    and

    - for locking purposes, rotating the profile rail (10) into the locked position and thereby receiving the neck portion (2b) of each lamella (1, 1') in a respective one of the recesses (12, 12'), so that the sliding head (2a, 2a') engages behind the recess (12, 12') and each lamella (1, 1') is immovably arranged along the profile rail (10) with the sliding head (2a, 2a') in the profile rail (10) in a position determined by the respective recess (12, 12'), wherein

    - for rotating the profile rail (10), the guiding of an actuating pin (14) takes place, which extends laterally from a bottom rail (4) of the venetian blind device (100) and which is movable in a positively driven manner on the bottom rail (4) in a lamella plane, which is defined by the plurality of the lamellae (1, 1') and in which the longitudinal axes of the lamellae (1, 1') are located, in a thread-like cam groove (13'), which adjoins the open longitudinal side (11) of the profile rail (10) and which extends in a direction according to the arrangement of the recesses (12, 12') on the profile rail (10) and is present in an end portion (130) on a first end of the profile rail (10) or in a first journal end piece (13), which is connected in a rotationally fixed manner to the profile rail (10) on a first end of the profile (10),

    wherein the actuating pin (14)

    a) for unlocking purposes, is moved out of the thread-like cam groove (13') in the direction of the open longitudinal side (11) of the profile rail (10), so that the profile rail (10) is rotated into the unlocked position; and

    b) for locking purposes, is moved from the open longitudinal side (11) of the profile rail (10) into the thread-like cam groove (13'), so that the profile rail (10) is rotated into the locked position.
12. The method according to claim 11,
    comprising the step of

    - securing the locked position of the profile rail (10) by turning the lamellae (1, 1') from an open position, in which the surfaces of the lamellae (1, 1') are positioned parallel to one another, into a shading position, in which the surfaces of the lamellae (1, 1') are located next to one another, wherein a latching element (210), which, on the sliding head (2a') of at least one predetermined lamella bracket (2') on at least one predetermined lamella (1') has a latching direction perpendicular to the surface of the lamella (1'), engages with a latching recess (120), which is present on the profile rail (10) at a predetermined circumferential position with respect to a circumferential position of the recess (12'), which is assigned to the predetermined lamella (1'), so that the engagement of the latching element (210) with the latching recess (120) is provided when the profile rail (10) is present in the locked position and the lamella (1') in the shading position.
13. The method according to claim 11 or 12,
    comprising the step of

    - securing the locked position of the profile rail (10) by moving a latching bolt (16) from a retracted position into a latched position, in which the latching bolt (16) engages with a latching recess (15'), which is present at a circumferential position, which is predetermined with respect to a circumferential position of the recesses (12) on the profile rail (10), of a second journal end piece (15), which is connected in a rotationally fixed manner to the profile rail (10) on a second end of the profile rail (10), so that the engagement of the latching bolt (16) with the latching recess (15') is provided when the profile rail (10) is present in the locked position.

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