EP1182674B1 - End position adjustment device - Google Patents

Abstract

The device has an adjustment sliding element (16,17) for the relevant end position that works in conjunction with a latching device (39,40) that operates in the adjustment state and a fixing arrangement (21,11) controlled by a restoring arrangement (14,15,10) connected to an indexing plate axle so that it releases the latching element (40) and resets the latched adjustment sliding element (17).

Description

The invention relates to a Endlageneinstellvorrichtung a driven by an electric drive blind according to the preamble of claim 1.

Such Endlageneinstellvorrichtung is for example by the EP-A1-0 844 633 known. The shifter of this known Endlageneinstellvorrichtung are resiliently formed and each carry two spring-mounted in the adjustment pins, pointing in the direction of the switching discs (referred to there as control discs) and have a thickened, free end. On the indexing disks extending over a peripheral region, are continuously deepening and ending in an undercut recesses provided. The thickenings engage in the adjustment in the recesses and then hit the undercuts, so that the switching disc axes are held while the gears can continue to rotate on the slipping clutches. In this way, any desired end position the Endlagenabschaltvorrichtung and thus the upper and lower holding end of the blind can be adjusted individually.

The disadvantage of this known Endlageneinstelleinrichtung is that the Einstellstellschieber must be pressed while continuing to drive the electric drive until the thickening of the bearings mounted in the adjusting slides pins in the undercuts of the discs. This can take a maximum of time until the discs have performed a revolution.

By the DE-C2-19750210 a limit switch device for the drive device of a blind is known, which has a separate actuator, which has a releasably lockable on the shaft actuating lever. How this limit switch device actually works can not be understood from the description.

Furthermore, by the DE-C2-3011706 a shaft end switch is known, which is formed similar to the preamble of claim 1, but without disclosing its characterizing features. There are only holding members provided as a holding means that do not automatically, but must be reset by hand.

The object of the invention is to provide a Endlageneinstellvorrichtung referred to in the preamble of claim 1, in which the adjustment, in particular at a standstill, optionally even when the electric drive, by short-term operation of the corresponding slide and an automatic return of this adjustment slide are possible ,

This object is achieved with the features of claim 1.

The user initiates the adjustment process by briefly pressing the adjusting slide - for example when the electric drive is at a standstill - then switches on the electric drive and moves to the desired end position of the blind. It is essential that the adjusting slide remains independently held in the depressed position. In order to save the end position, the electric drive must be operated in the opposite direction of rotation, whereby the setting slide automatically resets and thus the adjustment process is completed.

According to a further embodiment of the invention, the retaining means for the relevant end position with two on the switching disc axes sitting side by side, separate from the switching discs, substantially circular control discs are formed. As a result, the function of the end position adjustment is physically separated from the function of the end position switch-off; the components of Endlageneinstellvorrichtung can therefore be arranged spatially favorable.

According to an expedient, further embodiment of the invention, the retaining means further comprise for each control disc arranged on the circumference of the control discs with a cam in the one circumferential direction steeply sloping first edge and also for each end position two pivotally connected to the adjusting slide holding lever with two side by side lying, movable and resilient arms tangentially to the control discs are engageable and at their free ends retaining claws for engagement behind the first flanks, wherein the first flanks of the two control discs are arranged so that they are aligned, albeit the notches of the switching discs aligned with each other.

According to an expedient, further embodiment of the invention, the restoring device is gradually formed by in the other circumferential direction of the control discs gradually in the control disc circumference passing second flanks of the cam, each by a running over a part of the control disc circumference rib per control disc and two webs of the adjusting slide, wherein the Ribs on the adjacent peripheral edges of the control discs begin to diverge over a portion of the width of the control disc periphery and terminate at the first flanks, and wherein the two arms of the retaining levers are alignable with the lands for return of the adjustment slide.

Another embodiment of the invention relates to a Endlageneinstellvorrichtung with bearings for the switching disc axes in a housing. According to this embodiment, the control discs are arranged on the other side of the bearings as the side on which the switching discs are arranged. As a result, a more uniform load of the switching disc axes is achieved.

According to an expedient, further embodiment of the invention, the blocking means are formed by a pin of the adjusting slide, which extends into the region of the associated switching arm and locks the switching arm upon actuation of the adjusting slide.

According to an expedient, further embodiment of the invention, the spring-back of the arms of the retaining device is supported by a spring supported on the adjusting slide, which exerts both a spring-back action in the direction of the control discs and a spring action in the direction of the arms towards each other.

According to an expedient, further embodiment of the invention, the latching devices for the two adjusting slides are arranged side by side and biased by a common spring means.

According to a simple further embodiment of the invention, the spring means is a feather pillow, in particular a silicone pillow.

Fig. 1

Eine Stirnansicht eines geöffneten Gehäuses mit einer Endlageneinstellvorrichtung gemäß der Erfindung, wobei kein Einstellschieber der Endlageneinstellvorrichtung betätigt ist.

Fig. 2

Einen Längsschnitt durch das Gehäuse und relevante Teile der Endlageneinstellvorrichtung der Fig. 1, wobei aber die dargestellte äußere Steuerscheibe eine andere Position aufweist.

Fig. 3

Eine Abwicklung der Umfangsflächen der zwei in Fig. 2 dargestellten Steuerscheiben.

Fig. 4

Eine perspektivische Ansicht eines in den Figuren 1 und 2 dargestellten Einstellschiebers und des daran drehbar angebrachten Hebels.

Fig. 5

Eine der Fig. 1 ähnliche Stirnansicht des geöffneten Gehäuses mit der Endlageneinstellvorrichtung, wobei beide Einstellschieber der Endlageneinstellvorrichtung betätigt sind.

Fig. 6

Eine der Fig. 1 ähnliche Stirnansicht des geöffneten Gehäuses mit der Endlageneinstellvorrichtung, wobei der rechte Einstellschieber der Endlageneinstellvorrichtung betätigt ist und die zugeordneten Steuerscheiben mit ihren Nocken fluchten.

Fig. 7

Einen zur Fig. 6 zugehörigen Längsschnitt.

Fig. 8

Eine der Fig. 1 ähnliche Stirnansicht des geöffneten Gehäuses mit der Endlageneinstellvorrichtung, wobei der rechte Einstellschieber der Endlageneinstellvorrichtung gerade zurückgestellt wird und

Fig. 9

Einen zur Fig. 8 zugehörigen Längsschnitt.

The invention will now be explained in more detail with reference to an embodiment. Show it:

Fig. 1

An end view of an open housing with a Endlageneinstellvorrichtung according to the invention, wherein no adjusting slide of the Endlageneinstellvorrichtung is actuated.

Fig. 2

A longitudinal section through the housing and relevant parts of the Endlageneinstellvorrichtung the Fig. 1 but wherein the outer control disk shown has a different position.

Fig. 3

A settlement of the peripheral surfaces of the two in Fig. 2 illustrated control discs.

Fig. 4

A perspective view of one in the FIGS. 1 and 2 illustrated adjusting slide and the rotatably mounted lever.

Fig. 5

One of the Fig. 1 similar end view of the open housing with the Endlageneinstellvorrichtung, wherein both adjusting slide the Endlageneinstellvorrichtung are actuated.

Fig. 6

One of the Fig. 1 similar end view of the open housing with the Endlageneinstellvorrichtung, wherein the right adjusting slide the Endlageneinstellvorrichtung is actuated and the associated control discs are aligned with their cams.

Fig. 7

One to Fig. 6 associated longitudinal section.

Fig. 8

One of the Fig. 1 similar end view of the open housing with the Endlageneinstellvorrichtung, wherein the right adjusting slide the Endlageneinstellvorrichtung is just reset and

Fig. 9

One to Fig. 8 associated longitudinal section.

Out Fig. 1 It can be seen that in a housing 1 on a base plate 2 of the housing 1 centrally driven by an electric motor (not shown) hexagonal rod (not shown) drives a rotatably mounted in the base plate 2, hollow drive pinion 3. The electric motor also drives a blind, not shown. On the other, not visible side of the base plate 2 is also a Endlagenabschaltvorrichtung not directly related to the invention and therefore not shown. This Endlagenabschaltvorrichtung has each end position on a differential gear, wherein for the relevant end position two sitting on each other in progress switching disc axes switching disks are arranged to rotate against each other. The indexing disks are driven at different speeds by the drive pinion 3 by gears equipped with different numbers of teeth. These gears are connected via friction clutches with the switching disc axes. Each two shift discs are adjacent to each other and each have a notch on its circumference, in which a biased to the periphery of the shift discs Schaltarmspitze a switching arm can intervene, which actuates a switching lever a switch plunger of the respective end position associated microswitch. The number of teeth of the gears per end position are slightly different. For example, the one gear each have 40 teeth and the other gears each 41 teeth.

The meshing axes of the shifters also extend to the baseplate side opposite the gears and shifters, which in FIG Fig. 1 is shown and on which the Endlageneinstellvorrichtung is arranged. On the two mutually running switching disc axes are on this base plate side two substantially circular control discs 4, 5 and 6, 7 rotatably attached, in the FIGS. 1 and 2 lie one behind the other. In this case, the outer control discs 4, 6 on the respective inner disc axis, of which the end 8 and 9 in Fig. 1 can be seen, and the inner control discs 5, 7 arranged on the respective outer disc axis (not shown). The control discs 6, 7 are in Fig. 2 shown.

The control discs 4, 6 are mirror-inverted to the control discs 5, 7 on its circumference to a plane lying parallel to the base plate 2, while the control discs 4, 5 to the control discs 6, 7 to a plane perpendicular to the base plate 2 plane formed the same mirror image are. It is therefore sufficient to describe one of the control disks, namely the control disk 7 in more detail. On the circumference of the control disk 7, a cam 10 is arranged, which in the one circumferential direction has a steeply sloping to the control disk circumference first edge 11 and in the other circumferential direction gradually merging into the control disk circumference second edge 12. In the same way, a cam 13 is provided on the circumference of the control disk 7.

The two control discs 6, 7 are further provided on their circumference, each with a circumferentially extending rib 14 and 15, each running over a part (about half) of the control disc circumference. These ribs begin at the adjacent peripheral edges of the control discs, diverge over a portion of the width of the control disc circumference and terminate at the first flanks, such as the flank 11. This is particularly clear from the in Fig. 3 shown settlement of the peripheral surfaces of the control discs 6, 7 to recognize.

The Endlageneinstellvorrichtung further includes for each end position an adjusting slide 16 or 17, each with a mounted in the housing 1 adjustment knob 18 and 19 and also for each end position two limited with the respective adjusting slide 16 or 17 pivotally connected holding lever 20, 20 'and 21st , 21 '. Each of these retaining levers has an arm, such as the arm 22 and 23 in Fig. 2 , on, at the free end of a tangible to the control discs on the adjusting disc holding claw 24 and 25 is located. In Fig. 1 For the two end positions, only the two outer retaining levers 20 and 21 are visible. The two arms 22, 23 are biased by means of an associated adjusting slide 17 supporting wire spring 27 in the direction of the control discs 6, 7, however, are rotationally limited in the direction of rotation by lugs 28, 29, which are in the region of rotation points 30, 31 and are supported on the Einstellschiebern 16 and 17 respectively. The arms 22, 23 but can - even separately - limited spring back. The holding lever 20, 20 ', 21, 21' are made of flexible plastic and have, as in particular Fig. 4 shows, at the foot of their arms 22, 23 each have a film hinge 32 and 33, so that these arms can be bent apart sideways. The wire spring 27 supports the resilience of the arms 22, 23, which is limited by a mandrel 34 of the adjusting slide 17.

The retaining levers 21, 21 'with their two arms 22, 23 and retaining claws 24, 25 and the cams 10, 13 with their first flanks (11) form a retaining device.

The adjusting slide 17 also has two parallel webs 35, 36 (FIG. Figures 2 . 4 ), which point in the direction of the arms 22, 23 and their ends serve as stops for these arms, as will be explained in more detail. The webs 35, 36 together with arms 22, 23, the cam 10, 13 and the ribs 14, 15 a return device.

Further, the adjustment slide is provided with a laterally projecting pin 37 (FIG. Figures 2 . 4 ) provided after Fig. 2 protrudes through a slot 38 of the base plate 2 on the other side of this base plate. This pin is used in a manner not shown to lock in Endlageneinstellzustand the switching arm of the Endlagenabschaltvorrichtung so that its associated Schaltarmspitze does not fall into the notches and not the associated microswitch is actuated. This is a prerequisite that in the Endlageneinstellzustand the electric drive can be moved.

Further, a locking device 39 and 40 is provided for each end position, each consisting of a locking cam 41 and 42 on the adjusting slide 16 and 17 and a spring-loaded locking lever 43 or 44 with an arranged at the end locking lug. These locking levers are mounted side by side on the base plate 2 and together by a flexible spring cushion 45, preferably made of silicone, cushioned against each other.

Incidentally, the elements of the retaining device, the return device and the locking device for the one end position are mirror images of those for other end position formed.

In the FIGS. 1 and 2 are the knobs 18, 19 not pressed. During operation of the blind, the retaining claws (24, 25) of the arms (22, 23) of the retaining levers 20, 20 'of the right end position are released from the control discs 6, 7. The same applies to the left end position. The blind is stopped during operation at preset end positions.

In Fig. 5 both adjusting slides 16, 17 are pressed. Although this setting state does not occur in normal operation, it shows how different the position of the holding levers 20, 20 ', 21, 21' can be at different positions of the control disks 4-7. While the arm 26 and the arm behind it touch a rib-free peripheral part of the control discs 4, 5 and the inner arm 23 of the holding lever 21 'touches a rib-free peripheral part of the control disk 7, the arm 22 hits the cam of the control disk 6. The arm 22 is pushed away against the spring force of the associated wire spring 27 and can avoid it. The adjusting slide 16, 17 can be kept in this setting state because the locking cams 41, 42 pushed past the locking lugs of the locking lever 43, 44 and these locking lugs are engaged behind these locking cams.

In Fig. 6 only the right adjusting slide 16 is actuated. The retaining levers 21, 21 'are with their two holding claws on a rib-free part of the control discs 6, 7 and have optionally held in continuation or new activation of the electric drive, the two control discs (left rotation) by hook behind the associated first edge until the in Fig. 6 shown state is reached, in which both first flanks of the control discs 6, 7 are aligned with each other and thus the two notches of the associated (Not shown) switching discs are aligned. This in Fig. 6 shown setting state is held when now the electric drive continues to run and is turned off in the desired end position. Fig. 7 shows this setting state as well.

The retaining levers 21, 21 'with their holding claws and the cams 10, 13 with their steep first flanks can therefore be referred to as a retaining device.

Now, if the electric drive is turned on in the opposite direction and the blind tapers in the direction of the other end position, the holding lever 21 hits in clockwise rotation of the control discs 6, 7 on the beginning of the ribs 14, 15 (FIG. Figures 2 . 3 ). The arms 22, 23 then run along the outer flanks of the ribs 14, 15 and are pressed apart until they are aligned with the webs 35, 36. Upon further movement of the control discs 6, 7, the cams 10, 13 are reached, the arms 22, 23 press against the webs 35, 36 and thus reset the adjusting slide 17 again. The arms 22, 23 are brought back into disengagement with the ribs 14, 15 and bend back to each other, so that they reach their original position again.

The locking device 40 also returns to its starting position. The state shortly before reaching these initial positions is in the FIGS. 8 and 9 played.

A setting of the other end position takes place in an analogous manner. The retaining devices, the restoring devices and the locking devices can be accommodated in a space-saving small-diameter housing.

Claims (9)

1. End-position adjusting apparatus for a Venetian blind, which is driven by an electric driving mechanism and has an end-position switching-off device with a differential transmission, wherein two switching discs, which are situated on switching disc axles extending into each other, are disposed so as to be pivotable relative to each other for the pertinent end position, which discs are driven at different speeds by toothed wheels which are provided with different numbers of teeth and are connected to the switching disc axles via sliding couplings, wherein the switching discs lie adjacent each other and have a respective notch on their periphery, a switching arm tip of a switching arm being initially tensioned relative to the periphery of the switching discs and being able to engage in said notch, which switching arm thereby actuates a switching ram of a microswitch via a shift lever, with a respective adjustment slider for each end position, which slider is in operative connection with securing means for securing the switching disc axles and with blocking means for preventing the switching tip from falling into the notches during the adjusting process, characterised in that the adjustment slider (16, 17), which is provided for the pertinent end position, is in operative connection with a locking device (39; 40) which acts in the adjusting state, and the securing means (21, 11) are controllable by a resetting means (14, 15, 10, 13), which is in connection with the switching disc axles, and are designed in such a manner that they release the locking device (40) and reset the engaged adjustment slider (17).
2. End-position adjusting apparatus according to claim 1, characterised in that the securing means for the pertinent end position are formed with two substantially circular control discs (4, 5; 6, 7), which are situated adjacent each other on the switching disc axles and are separated from the switching discs.
3. End-position adjusting apparatus according to claim 2, characterised in that the securing means also have, for each control disc, a cam (10, 13), which is disposed on the periphery of the control discs (6, 7) and is provided with a first side wall (11), which descends steeply towards the periphery in the one peripheral direction, and said securing means also have, for each end position, two retaining levers (21, 21'), which are pivotably connected to the adjustment slider (17) and are provided with two adjacently situated, displaceable and springing-back arms (22, 23), which are adjustable tangentially to the control discs (6, 7) and have, at their free ends, retaining claws (24, 25) for engagement behind the first side walls (11), the first side walls (11) of the two control discs (6, 7) being so disposed that they are in alignment with each other, even when the notches of the switching discs are in alignment with each other.
4. End-position adjusting apparatus according to claim 3, characterised in that the resetting device is formed by second side walls (12) of the cams (10, 13), which extend gradually into the control disc periphery in the other peripheral direction of the control discs (6, 7), by a respective rib (14; 15), which extends over a portion of the control disc periphery, per control disc, and by two webs (35, 36) of the adjustment slider (17), the ribs (14, 15) beginning at the adjacent peripheral edges of the control discs, diverging from each other over a portion of the width of the control disc periphery, and terminating at the first side walls (11), and the two arms (22, 23) of the retaining levers (21, 21') being able to be brought into alignment with the webs (35, 36) for the resetting of the adjustment slider (17).
5. End-position adjusting apparatus according to one of claims 2 to 4, having bearings for the switching disc axles in a housing, characterised in that the control discs (4-7) are disposed on the side of the bearings which is not the side on which the switching discs are disposed.
6. End-position adjusting apparatus according to claim 5, characterised in that the blocking means are formed by a pin (37) of the adjustment slider (17), which extends into the region of the associated switching arm and blocks the switching arm upon actuation of the adjustment slider (17).
7. End-position adjusting apparatus according to one of claims 3 to 6, characterised in that the springing-back of the arms (22, 23) of the securing device is assisted by a spring (27), which is supported on the adjustment slider (17) and exerts both a springing-back action in the direction towards the control discs (6, 7) and a springing-back action in the direction of the arms (22, 23) towards each other.
8. End-position adjusting apparatus according to one of claims 1 to 7, characterised in that the locking devices (39, 40) for the two adjustment sliders (16, 17) are disposed adjacent each other and are initially tensioned by a common resilient means (45).
9. End-position adjusting apparatus according to claim 8, characterised in that the resilient means is a resilient cushion (45), more especially a silicone cushion.

Images