EP2211012A2 - Drive and turning device for the lamellae of a blind - Google Patents

Abstract

The device (1) has a rotation mechanism (6) for tilting lamellas, and a stopper flange for fixing an angle end position for the lamellas. An actuating element (15) is connected with the rotation mechanism by a play mechanism for locking the lamellas in an operating position during lowering a jalousie. Winding coils (5, 5'), a rotation mechanism (6), a stopper flange (11), the actuating element and a play mechanism (12) are arranged in common bearing housings (4, 4'). The actuating element is provided with a base element. An independent claim is also included for a method for swiveling lamellas of a shutter.

Description

The invention relates to a drive and turning device for the slats of a blind, with a bearing housing, a winding spool for a fastener tape, a turning mechanism for tilting the slats, a stop flange for fixing the Winkelendstellung for the slats and one by means of a lost motion mechanism with the turning mechanism in operative connection bringable actuator for locking the slats in a working position when lowering the blind.

Venetian blinds with a drive and turning device are well known, for example from the WO 2004/059 117 A1 or the EP 10 52 365 B1 , It allows the so-called working position, in which the slats are locked in an intermediate angle position to lower the blinds in a different than in the closed state, the backlash mechanism to ensure that the actuator after a reversal of the drive shaft after a predetermined number of revolutions is activated.

As a disadvantage of the previously known solutions for the realization of a working position, the combination of the bearing housing with a the backlash mechanism and the actuator-containing attachment module conditional component size of the blind storage has been found. Another problem is in the previously known constructions ensuring that the actuator is actually brought into operative connection with the turning mechanism or disengaged. This assurance takes place in the previously known solutions by acting on the actuating element with a spring, which is again negatively affects the space required for it.

Based on this prior art, it has the object of the invention to provide a drive and turning device for the slats of a blind, which represents a structurally simple solution with respect to the prior art significantly reduced space requirement while avoiding the disadvantages described above.

The invention solves this problem by at least the winding spool, the turning mechanism, the stop flange, the actuator and the lost motion mechanism are arranged in a common bearing housing.

A structurally simple and also stable solution can be achieved if, according to a further embodiment of the invention, the bearing housing for rotatably receiving a drivable, the bearing housing passing drive shaft is formed, the turning mechanism for moving the slats between the Winkelendstellurigen defined by Anschiagflansches at least one turning element and a stop member releasably engageable with the turning member, and the operating member is movable between an engaging position locking the stopper member in an angular intermediate position and a releasing position, wherein at least the winding reel, the turning mechanism and the lost motion mechanism are rotatable in the bearing housing by the drive shaft substantially therefrom completely enclosed, are arranged.

With such an arrangement, in particular by the arrangement of the actuating element and the lost motion mechanism in the one common bearing housing, a kurzbauendes blinds storage longitudinal extension compared to the known from the prior art Venetian blind with the same function is reduced by more than a third.

In order to have low the overall height of the usually substantially cylindrical bearing housing, which simultaneously corresponds to the housing for the entire blinds in the invention, is provided according to a further embodiment of the invention that in a conventional manner at least the reel spool, the turning mechanism and the lost motion mechanism are arranged coaxially in the bearing housing.

An essential basic idea of the invention is thus to arrange the entire mechanism, which is required for lifting, lowering, turning and locking the slats in a working position in a common bearing housing, so that the size of the drive and turning device according to the invention with work position function of size a blind storage without work function corresponds.

In practice, this means that the difference between a standard bearing without a work function and a blind bearing with working position function is merely adding or omitting the actuator, while in the solutions of the prior art, the difference between the standard bearings without work function and the blinds position with working position function in the arrangement of a longitudinal extension of the standard bearing substantially enlarging additional module in which the lost motion mechanism and the actuator are arranged, is located.

According to a further embodiment of the invention, it is provided that the actuating element has a base element and at least two engagement elements arranged thereon, of which a first engagement element is in operative connection with the turning mechanism and / or a second engagement element in operative connection with the lost motion mechanism or can be brought.

In order to bring the first or the second engagement element of the actuating element with the turning mechanism or the lost motion mechanism in operative connection, a change in position of the actuating element in the bearing housing is necessary. For this purpose, according to a preferred embodiment of the invention provides that the actuating element is movable by converting a rotational movement of the drive shaft in an axial movement in the direction of the axis of rotation between the release and the engaged position, wherein a reliable operation can be achieved when the actuating element at least during the movement between the release and the engagement position, and vice versa, free from a stored-force application, in particular spring action is.

In contrast to the prior art, in which this movement of the actuating element is achieved just by applying an energy storage, the change of the actuating element between the release and input position in the invention by rotating the drive shaft, whereby malfunction on the one hand, the use of elastic Force accumulators can occur, be avoided and on the other hand, a material-friendly solution is given.

The invention further relates to a drive and turning device for the slats of a blind, with a bearing housing in which at least one winding spool for a fastener tape and a turning mechanism for tilting the slats between defined Winkelendstellungen are rotatably supported by a drive shaft, and one with the turning mechanism in Actuating engageable actuator for locking the slats in a working position when lowering the blind, wherein the actuating element between a stop member in an angular intermediate position arresting engagement position and a release position is movable.

In the solutions known from the prior art, it is necessary due to the structural arrangement of the lost motion mechanism and the actuating element in a separate additional module to apply the actuating element by means of an elastic force accumulator to ensure a change of the actuating element between the engaged and released position. This arrangement of an additional energy storage is reflected in addition to the increased space required additionally negatively on the cost of a Venetian blind bearing work function down.

To circumvent this problem, a further embodiment of the invention therefore provides that the actuating element to the rotation axis R is arranged substantially parallel movable in the bearing housing, wherein the movement of the actuating element between the release and the engagement position by means of the turning mechanism.

It is therefore dispensed with the arrangement of an additional actuator acting on the energy storage and ensured the necessary movement of the actuator in a simple manner with the already existing turning mechanism.

For this purpose, a preferred embodiment of the invention provides that the actuating element to the rotation axis R is arranged substantially parallel pivotable in the bearing housing. As favorable, it has turned out, if that Actuator is pivotally mounted on the bearing housing about an axis of rotation R substantially normal.

This preferred pivotable arrangement of the actuating element in the bearing housing allows a particularly short design and is due to the rotational support of the actuating element is a particularly smooth variant.

According to an alternative embodiment of the invention, it is provided that the actuating element is arranged linearly displaceable in the bearing housing substantially parallel to the axis of rotation R. A continuously guided, translatory movement can be achieved if a guide element is arranged or formed on the actuating element, by means of which the actuating element is guided in a linear manner displaceable in a corresponding guide formed on the bearing housing. As low has been found, when the guide is formed by a formed in the wall of the bearing housing passage opening.

According to a further embodiment of the invention, it is further provided that the stop element of the turning mechanism is disc-shaped and has on its outer peripheral surface at least one deflecting element and a locking element, which cooperate with the actuating element, wherein a secure locking of the actuating element on the stop element can then be achieved when the locking element is V-shaped.

Such a design of the peripheral surface of the stop element, the stop element can serve not only as in the prior art for locking the slats of an intermediate angle position, but also cause the movement of the actuating element between the release and engaged position and vice versa.

For this purpose, according to a further embodiment of the invention, it is provided that the actuating element is driven during its movement between the release and the engagement position by means of a corrugated wheel, wherein the shaft of the corrugated wheel of the drive shaft and the wheel of the wave wheel from the stop element of Turning mechanism is formed and the conversion of the rotational movement of the stop element takes place in a direction of rotation R axial movement of the actuating element substantially by means of the least one arranged on the peripheral surface of the stop element deflecting element.

In other words, therefore, the engagement elements of the actuating element on the peripheral surface of the stop element are reciprocated substantially linearly in the axial direction of the drive shaft depending on the direction of rotation of the drive shaft.

With regard to the design of the lost motion mechanism, the invention is subject only to the restriction that the lost motion mechanism is housed in the one common bearing housing.

For this purpose, a preferred embodiment of the invention provides that the lost motion mechanism is formed at least in two parts and has a disc-shaped, rotatable by means of the drive shaft body with a spiral guide track for cooperation with the actuator and a coupling element for cooperation with the drive shaft. In terms of a compact design, it has been found to be particularly advantageous if the lost motion mechanism has exactly one main body and a coupling element.

The transmission of the rotational movement of the coupling element to the actuating element takes place by means of the disk-shaped base body, wherein the coupling element is annular according to an embodiment of the invention and on its inner circumferential surface at least one cam-shaped projection, via which the coupling element is mounted in a formed on the winding spool guide groove , having.

Thus, the transmission of the rotational movement of the drive shaft can be done on the actuating element while ensuring a freewheel with only one coupling element and a body, provides a further embodiment of the invention, that the coupling element is arranged and designed as a wobble ring. A stable and structurally simple solution can provide that the inner circumferential surface of the coupling element has an elliptical outline.

The transmission of the rotational movement of the coupling element to the base body is ensured according to a further embodiment in that the coupling element has at least one to its main plane substantially normal arranged driver element for engagement in the spiral guide track of the disk-shaped main body of the lost motion mechanism.

With a thus configured lost motion mechanism, in particular the formation of the coupling element according to the invention, the number of parts required for the lost motion mechanism can be reduced to two, while in the solutions according to the prior art usually three circular rings for transmitting the rotational movement and ensuring the freewheel needed.

Of course it is - as an alternative embodiment of the invention provides - even with the subject of the application quite conceivable that the lost motion mechanism is formed at least three parts and three annular coupling elements, of which a coupling element cooperates with the actuator has.

A further embodiment of the invention provides that the stop flange, as known per se, is designed to receive a plurality of stop pins in different positional positions, wherein the different position positions each define different angle end positions.

The invention further relates to a blind with a drive and turning device according to the invention.

Furthermore, a method for pivoting the slats of a blind with a drive and turning device according to the invention, in which the slats during lowering of the blind in an angle between two angle end positions intermediate position, in which the stop element of the turning mechanism cooperates with the actuating element, are specified become.

According to the innovation, it is provided that the actuating element is brought from its release position into the effective range of the turning mechanism as a result of rotation of the drive shaft from the main body of the lost motion mechanism and the actuator with continued rotation of the drive shaft from the stop element of the turning mechanism, the principle of a corrugated wheel following, to the axis of rotation R in Is moved substantially in parallel until the actuating element has reached its engaged position, in which it is engaged with the arranged on the outer peripheral surface of the stop element locking element.

In contrast to the prior art, therefore, the movement of the actuating element is no longer by means of an actuating element acting elastic force, but - as a preferred embodiment of the invention provides - according to step b) exclusively by converting the rotational movement of the drive shaft in an axial axis of rotation R movement wherein the force transmission on the outer peripheral surface of the stop element, at least partially by means of at least one deflection element arranged thereon, which is in operative connection with the first engagement element of the actuating element, takes place.

Fig. 1 a bis 1d'

unterschiedliche Stellungen der Lamellen beim Senken und Heben der Jalousie,

Fig. 2

eine erfindungsgemäße Antriebs- und Wendevorrichtung in perspektivischer Darstellung,

Fig. 3

eine Explosionsdarstellung eines ersten Ausführungsbeispieles der Erfindung,

Fig. 4

einen Längsschnitt durch das Ausführungsbeispiel gemäß Fig. 3,

Fig. 5

einen Querschnitt entlang der Schnittlinie S-S' aus Fig. 4,

Fig. 6

eine Ansicht eines Koppelelementes des Totgangmechanismus,

Fig. 7

eine Ansicht eines Grundkörpers des Totgangmechanismus,

Fig. 8

das Betätigungselement gemäß Ausführungsbeispiel 3,

Fig. 9

in einer Explosionsdarstellung ein weiteres Ausführungsbeispiel der Erfindung,

Fig. 10

einen Längsschnitt durch das Ausführungsbeispiel gemäß Fig. 9,

Fig. 11

einen Querschnitt entlang der Schnittlinie S-S' aus Fig. 10 und

Fig. 12

das Betätigungselement gemäß Ausführungsbeispiel nach Fig. 9.

Further advantages and details of the invention will be explained in more detail with reference to the following description of the figures with reference to the embodiments illustrated in the drawings. It shows:

1 a to 1 d '

different positions of the slats when lowering and lifting the blind,

Fig. 2

a drive and turning device according to the invention in a perspective view,

Fig. 3

an exploded view of a first embodiment of the invention,

Fig. 4

a longitudinal section through the embodiment according to Fig. 3 .

Fig. 5

a cross section along the section line SS 'from Fig. 4 .

Fig. 6

a view of a coupling element of the lost motion mechanism,

Fig. 7

a view of a main body of the lost motion mechanism,

Fig. 8

the actuating element according to embodiment 3,

Fig. 9

in an exploded view, another embodiment of the invention,

Fig. 10

a longitudinal section through the embodiment according to Fig. 9 .

Fig. 11

a cross section along the section line SS 'from Fig. 10 and

Fig. 12

the actuator according to the embodiment according to Fig. 9 ,

The 1a to 1d ' show the functional principle of a Venetian blind bearing with working position function.

While in conventional blinds, the slats only between two angle end positions A, B, the blinds usually in the closed state (Winkelendstellung B) is lowered and lifted in the half-open state (Winkelendstellung A), can be pivoted, have drive and turning devices with a working position function lying between the angle end positions A, B angle intermediate position in which the slats in the open state, usually about 50 ° open to the outside, can be locked, so that the blind in this working position of the slats, ie can be lowered with incident daylight.

The Fig. 1a and 1a ' show this work position function, in which the slats 2 are held in the intermediate angle position C and the blind 3 is lowered by turning the drive shaft to the right in the arrow direction.

For complete closing of the blind 3, the working position, ie the locking of the slats 2 in the intermediate angle position C is first canceled by a change of direction of rotation of the slats 2 are pivoted by a further change in direction over the intermediate angle position C in the Winkelendstellung B, so that the blind is completely closed ( Fig. 1b, 1b ' ).

To lift the blind, as in 1c, 1c ' shown, the slats 2 of the blind 3 turned by changing the direction of rotation of the Winkelendstellung B in the Winkelendstellung A, so that at startup ( Fig. 1d, 1d ' ) the slats 2 are held in one of the Winkelendstellung A corresponding open position.

In Fig. 2 perspective view of a drive and turning device 1 according to the invention is shown, the bearing housing 4, 4 'of the size according to a standard bearing according to the prior art without working position function corresponds. In the illustrated embodiment, the bearing housing has a bearing body 4 and a bearing cap 4 ', which are made of plastic, in particular by injection molding, and are positively connected to one another. The bearing housing 4, 4 'is designed for rotatably receiving a drive shaft, not shown, which passes through the bearing body 4 and is rotatable about the axis of rotation R.

In the first embodiment according to Fig. 3 are in the bearing body 4 coaxial with each other and about the rotation axis R rotatable from left to right, the reel spool 5, the turning mechanism 6, the lost motion mechanism 12 and the stop element 8 are arranged.

The winding spool 5 is cylindrical and has a disk-shaped, non-rotatably mounted flange and a passage opening for the drive shaft. At the winding spool 5, the coil disc 5 'is mounted on the left of the disc-shaped flange rotatably. The coil disc 5 'has, in addition to a passage opening for the drive shaft, a hole for receiving a lanyard pin 17, which serves for attachment of the wound on the reel spool 5 (not shown).

On the right side of the disk-shaped flange, the transmitting element 7 and the stop element 8 of the turning mechanism 6 are rotatably arranged on the winding spool 5. Between the turning element 7 and the stop element 8, the turning spring 9 is arranged in a conventional manner. The reversing cord 10 is connected to the turning element 7 or rests on this and is - not shown here - connected to the individual slats 2.

Between the stop element 8 of the turning mechanism 6 and the stop flange 11, which simultaneously forms an end wall of the bearing body 4, 4 'in the embodiment shown, the backlash mechanism 12 is also arranged coaxially rotatable about the axis of rotation R. The lost motion mechanism 12 is formed in two parts and has a disc-shaped base body 13 with a passage opening for the drive shaft and a helical guide track 25 and a disc-ring-shaped coupling element 14. The coupling element 14 and the Base body 13 are also mounted in the assembled state on the reel spool 5, wherein the cam-shaped projection 27 is mounted on the inner circumferential surface of the coupling element 14 in the guide groove 31 on the reel spool 5.

The stop flange 11 forms, as already mentioned above, an end face of the bearing body 4 and is rotatably connected thereto.

The adapter sleeve 29, which is arranged in the passage opening of the stop flange 11, serves to center the drive shaft, whereby it would of course also be possible to adapt the passage opening for the adapter shaft in the stop flange 11 directly to the cross-sectional area of the drive shaft and thus the drive shaft directly above the stop flange 11 to center.

By means of the stop pins 16, which are inserted into through holes 32 of the stop flange 11, the angle end positions A, B, between which the slats 2 can be tilted defined.

In other words, in the bearing housing 4, 4 ', one end of which is formed by stop flange 11, an elongated winding coil 5 in the form of a hollow shaft is arranged, wherein on the hollow shaft winding bobbin 5, which is rotatable by means of the drive shaft, the turning mechanism 6 and the Totgangmechanismus 12 are stored.

The actuating element 15 is in this embodiment about the rotational axis a, which is substantially normal to the axis of rotation R, pivotally mounted in the bearing body 4 and the first engaging member 20 with the stop element 8 of the turning mechanism 6 and the second engaging member 19 with the main body 13th the lost motion mechanism 12 can be brought into engagement.

Fig. 4 shows a longitudinal section through the embodiment according to Fig. 3 from which in particular the short construction of the drive and turning device 1 according to the invention can be seen. This small longitudinal extent is due to the inventive arrangement of the items 13, 14 of the lost motion mechanism 12th and the actuating element 15 between the turning mechanism 7 and the stop flange 11 is possible.

From the Fig. 5 the disc-shaped design of the coupling element 14 is particularly well visible, wherein the inner contour line is elliptical ( Fig. 6 ). On the inner peripheral surface 26, a cam-shaped projection 27 is arranged, with which the coupling element 14 is mounted positively in the guide groove 31 on the winding spool 5. Furthermore, on the coupling element 14 a to the main plane of the coupling element 14 substantially normal arranged driver element 28 is formed, which in the assembled state in the spiral guide track 25 of the base body 13 (FIGS. Fig. 7 ) intervenes. On the outer circumferential surface of the main body 13 of the backlash mechanism 12, a locking element 30 is formed, which cooperates with the second engagement element 19 of the actuating element 15.

The operation of the lost motion mechanism 12 will be described below. Upon rotation of the reel spool 5 by means of the drive shaft, the coupling element 14 rotates due to its storage by means of the cam-shaped projection 27 in the guide groove 31 of the reel spool 5 with this. In this case, the driver element 28 of the coupling element 14 is moved in the spiral guide track 25 of the base body 13 until it abuts one end of the guide track 25. In a further rotational movement of the drive shaft, the coupling element 14 takes with the base body 13 so that it also rotates in the direction of rotation of the drive shaft. As a result of the rotation, the locking element 30 is moved so that it subsequently engages with the second engagement element 19 of the actuating element 15, as a result of which the actuating element 15 is pivoted such that the first actuating element 20 engages with the deflection element arranged on the outer peripheral surface of the stop element 8 23 engages and is further moved by this until it locks with the locking element 22. In a further rotational movement of the drive shaft then the turning element 7 of the turning mechanism 6 via the turning spring 9 and the then fixed stop element 8 in a position in which the slats 2 are in an intermediate angle position C, locked.

Another embodiment of the invention is in the Fig. 9 to 12 shown. This embodiment differs from the embodiment according to Fig. 3 only in the different shape of the actuating element 15. The same parts have been given the same reference numerals, which is why a further detailed description is omitted.

Fig. 9 shows this second embodiment in an exploded view, wherein, in contrast to the embodiment according to Fig. 3 the actuating element 115 is arranged linearly substantially parallel to the axis of rotation R in the bearing body 4. In addition the in Fig. 12 shown actuating member 115 on an elongated base member 118, are formed on the guide elements 121, by means of which the actuating element 115 translationally guided in a formed on the bearing body 4 corresponding guide, which may be formed for example by a slot, is movable.

As in the first embodiment, the actuating element 115 via the second engagement member 119 with the main body 13 of the lost motion mechanism 12 and via, the second engagement member 120 with the stopper element 8 of the turning mechanism 6 operatively connected.

How out Fig. 9 can be seen, the stop element 8 next to the deflecting element 23 and the locking element 22 (FIG. Fig. 3 ) Furthermore, a stop element 24, with which the angle of rotation of the stop element 8 by means of the stop pins 16 which define the Winkelendstellung A, B of the slats 2, is limited.

Although the invention has been described in detail with reference to the embodiments shown, it goes without saying that the subject of the application is not limited to the illustrated embodiments. Rather, measures and modifications that serve to implement the inventive idea, quite conceivable and desirable. Thus, for example, the lost motion mechanism could be designed in several parts and comprise three annular coupling elements. In principle, it would also be conceivable to form the lost motion mechanism, for example in the form of a planetary gear. In this case, it would be useful to arrange the lost motion mechanism in a separate, connectable to the bearing body essay.

A basic idea of the invention in any case is to arrange the actuator to ensure the working position of the slats of a blind within the bearing body, so that the blinds for a standard solution without working position and the blinds for a solution with working position are essentially the same and the same size and a change between these two types of blinds can easily be done by adding or omitting the actuator.

Claims (16)

Driving and turning device for the slats of a blind, with a bearing housing, a winding spool for a lanyard, a turning mechanism for tilting the slats, a stop flange for setting the Winkelendstellung for the slats and a means of a lost motion mechanism with the turning mechanism operatively engageable actuator for locking the lamellae in a working position when lowering the blind, characterized in that at least the winding coil (5, 5 '), the turning mechanism (6), the stop flange (11), the actuating element (15) and the lost motion mechanism (12) in a common Bearing housing (4, 4 ') are arranged. Driving and turning device according to claim 1, characterized in that the bearing housing (4, 4 ') for rotatably receiving a drivable, the bearing housing (4, 4') passing through the drive shaft is formed, the turning mechanism (6) for moving the slats (2 ) between the by means of the stop flange (11) defined Winkelendstellungen (A, B) at least one turning element (7) and releasably engageable with the turning element stop element (8) and the actuating element (15) between a stop element (8) in an angle intermediate position (C) arresting engagement position and a release position is movable, wherein at least the winding spool (5, 5 '), the turning mechanism (6) and the lost motion mechanism (12) by means of the drive shaft rotatably in the bearing housing (4, 4'), of this essentially completely enclosed, are arranged. Driving and turning device according to claim 1 or 2, characterized in that at least the winding spool (5, 5 '), the turning mechanism (6) and the lost motion mechanism (12) are arranged coaxially in the bearing housing. Driving and turning device according to one of claims 1 to 3, characterized in that the actuating element (15) has a base element (18) and at least two engagement elements arranged thereon (19, 20), of which a first engagement element (20) in operative connection with the turning mechanism (6) and / or a second engagement element (19) is in operative connection with the lost motion mechanism (12) or can be brought. Driving and turning device according to claim 4, characterized in that the actuating element (15) by converting a rotational movement of the drive shaft in an axial movement in the direction of the axis of rotation (R) between the release and the engagement position is movable. Driving and turning device according to claim 4 or 5, characterized in that the actuating element (15), at least during the movement between the release and the engagement position, and vice versa, free from a stored-force actuation, in particular spring action is. Driving and turning device (1) for the slats (2) of a blind (3), with a bearing housing (4, 4 '), in which at least one winding spool (5, 5') for a fastener tape and a turning mechanism (6) for Tilting of the slats (2) between defined Winkelendstellungen (A, B) are rotatably supported by a drive shaft, and one with the turning mechanism (6) operatively engageable actuator (15) for locking the slats (2) in a working position when lowering the blind (3), wherein the actuating element (15) between a stop element (8) in an angular intermediate position (C) arresting engagement position and a release position is movable, in particular according to one of claims 1 to. 6, characterized in that the actuating element (15) to the rotation axis (R) is arranged substantially parallel movable in the bearing housing (4, 4 '), wherein the movement of the actuating element (15) between the release and the engagement position by means of the turning mechanism ( 7). Drive and turning device according to one of claims 1 to 7, characterized in that the stop element (8) of the turning mechanism (6) is disk-shaped and on its outer peripheral surface at least one deflecting element (23) and a locking element (22) with the Actuate (15) cooperate, has. Driving and turning device according to claim 8, characterized in that the actuating element (15) is driven during its movement between the release and the engagement position by means of a corrugated wheel, wherein the shaft of the corrugated wheel of the drive shaft and the wheel of the wave wheel from the stop element (8 ) of the turning mechanism (6) is formed and the conversion of the rotational movement of the stop element (8) in an axial movement of the actuating element (15) in the direction of the axis of rotation (R) substantially by means of at least one on the peripheral surface of the stop element (8) arranged deflecting element ( 23). Driving and turning device according to one of claims 1 to 9, characterized in that the lost motion mechanism (12) is formed at least in two parts and a disc-shaped, rotatable by means of the drive shaft body (13) with a spiral guide track (25) for cooperation with the actuating element ( 15) and a coupling element (14) for cooperation with the drive shaft. Driving and turning device according to claim 10, characterized in that the coupling element (14) is annular and has on its inner peripheral surface (26) at least one cam-shaped projection (27) which is arranged and configured for engagement with the drive shaft. Driving and turning device according to claim 11, characterized in that the coupling element (14) at least one to its main plane substantially normally arranged driver element (28) for engagement in the Spiral guide track (25) of the disk-shaped base body (13) of the lost motion mechanism (12). Driving and turning device according to one of claims 1 to 12, characterized in that the lost motion mechanism (12) is formed at least in three parts and three annular coupling elements, of which a coupling element with the actuating element (15) cooperates. Venetian blind with a drive and turning device according to one of claims 1 to 13. A method for pivoting the slats (2) of a blind (3) according to claim 14, wherein the slats (2) during the lowering of the blind (3) in an intermediate angle position (C) between two angle end positions (A, B), in the the stop element (8) of the turning mechanism (12) cooperates with the actuating element (15), can be locked, characterized in that a) the actuating element (15) is brought as a result of rotation of the drive shaft from the main body (13) of the lost motion mechanism (12) from its release position in the effective range of the turning mechanism (6) and b) the actuator (15) with continued rotation of the drive shaft from the stop element (8) of the turning mechanism (6), the principle of operation of a corrugated wheel following, to the rotation axis (R) is moved substantially parallel to c) the actuating element (15) its engagement position in which it is in engagement with the arranged on the outer peripheral surface of the stop element (8) locking element (22) has reached. A method according to claim 15, characterized in that the movement of the actuating element according to step b) exclusively by converting the rotational movement of the drive shaft into an axial movement in the direction of the axis of rotation (R) takes place, wherein the power transmission to the outer Peripheral surface of the stop element (8), at least partially by means of at least one deflection element (23) arranged thereon, which is in operative connection with the first engagement element (20) of the actuating element (15), takes place.

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